Entergy Operations, Inc.; Grand Gulf Nuclear Station, Unit 1, 41814-41824 [2012-17228]
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Federal Register / Vol. 77, No. 136 / Monday, July 16, 2012 / Notices
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Dated: Dated this 18th day of June 2012.
For the Nuclear Regulatory Commission.
Victor M. McCree,
Regional Administrator.
[FR Doc. 2012–17227 Filed 7–13–12; 8:45 am]
BILLING CODE 7590–01–P
NUCLEAR REGULATORY
COMMISSION
[Docket No. 50–416; NRC–2012–0105]
Entergy Operations, Inc.; Grand Gulf
Nuclear Station, Unit 1
Nuclear Regulatory
Commission.
ACTION: Final environmental assessment
and finding of no significant impact;
issuance.
AGENCY:
The U.S. Nuclear Regulatory
Commission (NRC or the Commission)
is considering issuance of an
amendment to Facility Operating
License No. NPF–29, issued to Entergy
Operations, Inc. (Entergy, the licensee),
for operation of the Grand Gulf Nuclear
Station, Unit 1 (GGNS Unit 1), located
in Claiborne County, Mississippi, in
accordance with NRC’s regulations.
Therefore, the NRC has prepared this
final environmental assessment (EA)
and finding of no significant impact
(FONSI) for the proposed action.
ADDRESSES: Please refer to Docket ID
NRC–2012–0105 when contacting the
NRC about the availability of
information regarding this document.
You may access information related to
this document, which the NRC
SUMMARY:
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possesses and are publicly available,
using any of the following methods:
• Federal Rulemaking Web site: Go to
https://www.regulations.gov and search
for Docket ID NRC–2012–0105. Address
questions about NRC dockets to Carol
Gallagher; telephone: 301–492–3668;
email: Carol.Gallagher@nrc.gov.
NRC’s Agencywide Documents Access
and Management System (ADAMS):
You may access publicly available
documents online in the NRC Library at
https://www.nrc.gov/reading-rm/
adams.html. To begin the search, select
‘‘ADAMS Public Documents’’ and then
select ‘‘Begin Web-based ADAMS
Search.’’ For problems with ADAMS,
please contact the NRC’s Public
Document Room (PDR) reference staff at
1–800–397–4209, 301–415–4737, or by
email to pdr.resource@nrc.gov. The
ADAMS accession number for each
document referenced in this notice (if
that document is available in ADAMS)
is provided the first time that a
document is referenced. Entergy
Operations, Inc. (Entergy, the licensee),
application for amendment is dated
September 8, 2010, and supplemented
by letters dated November 18, 2010,
November 23, 2010, February 23, 2011
(four letters), March 9, 2011 (two
letters), March 22, 2011, March 30,
2011, March 31, 2011, April 14, 2011,
April 21, 2011, May 3, 2011, May 5,
2011, May 11, 2011, June 8, 2011, June
15, 2011, June 21, 2011, June 23, 2011,
July 6, 2011, July 28, 2011, August 25,
2011, August 29, 2011, August 30, 2011,
September 2, 2011, September 9, 2011,
September 12, 2011, September 15,
2011, September 26, 2011, October 10,
2011 (two letters), October 24, 2011,
November 14, 2011, November 25, 2011,
November 28, 2011, December 19, 2011,
February 6, 2012, February 15, 2012,
February 20, 2012, March 13, 2012,
March 21, 2012, April 5, and April 18,
2012 (two letters), April 26, 2012, May
9, 2012, and June 12, 2012. Portions of
the letters dated September 8 and
November 23, 2010, and February 23,
April 21, May 11, July 6, July 28,
September 2, October 10, November 14,
November 25, and November 28, 2011,
and February 6, February 15, February
20, March 13, March 21, April 5, April
18, 2012 (two letters), April 26, 2012,
and May 9, 2012, contain sensitive
unclassified non-safeguards information
(proprietary) and, accordingly, have
been withheld from public disclosure.
The licensee’s letters are publicly
available in ADAMS at the accession
numbers listed in the table below:
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Document date
Accession No.
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11/18/2010 ............................................................
11/23/2010 ............................................................
2/23/2011 ..............................................................
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5/11/2011 ..............................................................
ML120660409
ML103260003
ML103330093
ML110540534
ML110540540
ML110540545
ML110550318
ML110680507
ML110730025
ML110820262
ML110900275
ML110900586
ML111050134
ML11112A098
ML111240288
ML111250552
ML111320263
• NRC’s PDR: You may examine and
purchase copies of public documents at
the NRC’s PDR, Room O1–F21, One
White Flint North, 11555 Rockville
Pike, Rockville, Maryland 20852.
FOR FURTHER INFORMATION CONTACT:
Alan B. Wang, Project Manager, Plant
Licensing Branch IV, Division of
Operating Reactor Licensing, Office of
Nuclear Reactor Regulation, U.S.
Nuclear Regulatory Commission,
Washington, DC 20555–0001; telephone:
301–415–1445; email:
AlanWang@nrc.gov.
SUPPLEMENTARY INFORMATION:
I. Background
The NRC published a notice in the
Federal Register requesting public
review and comment on a draft EA and
FONSI for the proposed action on May
11, 2012 (77 FR 27804), and established
June 11, 2012, as the deadline for
submitting public comments. The NRC
has received no comments regarding the
draft EA.
II. Environmental Assessment
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Plant Site and Environs
The GGNS Unit 1 site is located in
Claiborne County, Mississippi, on the
east bank of the Mississippi River at
River Mile (RM) 406, approximately 25
miles south of Vicksburg, Mississippi,
and 37 miles north-northeast of
Natchez, Mississippi. The GGNS Unit 1
site consists of approximately 2,100
acres, comprised primarily of
woodlands and former farms as well as
two lakes, Hamilton Lake and Gin Lake.
The land in the vicinity of GGNS is
mostly rural. GGNS Unit 1 is a General
Electric Mark 3 boiling-water reactor.
Identification of the Proposed Action
By application dated September 8,
2010, as supplemented, the licensee
requested an amendment for an
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Document date
6/8/2011
6/15/2011
6/21/2011
6/23/2011
7/6/2011
7/28/2011
8/25/2011
8/29/2011
8/30/2011
9/2/2011
9/9/2011
9/12/2011
9/15/2011
9/26/2011
10/10/2011
10/10/2011
10/24/2011
Accession No.
ML111590836
ML111670059
ML111730235
ML111750244
ML111880138
ML112101485
ML112370770
ML112410566
ML112420169
ML112490050
ML112521284
ML112550495
ML112580223
ML112690143
ML112840155
ML112840171
ML112980113
extended power uprate (EPU) for GGNS
Unit 1 to increase the licensed thermal
power level from 3,898 megawatts
thermal (MWt) to 4,408 MWt, which
represents an increase of approximately
13 percent above the current licensed
thermal power and approximately 15
percent over the original licensed
thermal power level of 3833 MWt. This
change in core thermal power level
requires the NRC to amend the facility’s
operating license. The operational goal
of the proposed EPU is a corresponding
increase in net electrical output of 178
megawatts electric (MWe). The
proposed action is considered an EPU
by the NRC because it exceeds the
typical 7 percent power increase that
can be accommodated with only minor
plant changes. EPUs typically involve
extensive modifications to the nuclear
steam supply system.
The licensee plans to make several
extensive physical modifications to
systems necessary to generate and/or
accommodate the increased feedwater
and steam flow rates to achieve EPU
power levels during a refueling outage
currently scheduled for 2012. In
addition, there will be land disturbance
involving installation of a new radial
well system. The actual power uprate, if
approved by the NRC, would occur
following the refueling outage in 2012.
The Need for the Proposed Action
The proposed action provides GGNS
Unit 1 with the flexibility to increase its
potential electrical output and to supply
additional electrical generation to the
State of Mississippi and the surrounding
region.
Environmental Impacts of the Proposed
Action
As part of the licensing process for
GGNS Unit 1, the NRC published a
Final Environmental Statement (FES) in
1981, Final Environmental Statement
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Document date
11/14/2011
11/25/2011
11/28/2011
12/19/2011
2/6/2012
2/15/2012
2/20/2012
3/13/2012
3/21/2012
4/5/2012
4/18/2012
4/18/2012
4/26/2012
5/9/2012
6/12/2012
Accession No.
ML113190403
ML113290137
ML113320403
ML113530656
ML12039A071
ML120470138
ML12054A038
ML120740083
ML12082A025
ML12097A055
ML12109A308
ML12109A290
ML12118A145
ML12131A535
ML12165A250
for the Operation of the Grand Gulf
Nuclear Station Units 1 and 2 (NUREG–
0777). The FES provides an evaluation
of the environmental impacts associated
with the construction and operation of
GGNS Units 1 and 2 (Unit 2 has since
been cancelled) over their licensed
lifetimes. The NRC staff used
information from the licensee’s license
amendment request and the FES to
perform its EA for the proposed EPU.
There will be extensive changes made
to the steam supply system of GGNS
Unit 1 related to the EPU action, but no
new construction is planned outside of
existing facilities. No extensive changes
are anticipated to existing buildings or
plant systems that directly or indirectly
interface with the environment. All
necessary modifications would be
performed in existing buildings at
GGNS Unit 1 with the exception of the
installation of a new radial well and
additional cooling units being added to
the auxiliary cooling tower.
Modifications to the steam supply
system of GGNS Unit 1 include the
following: replacing the reactor feed
pump turbine rotors; replacing the main
generator current transformers,
replacing the high pressure turbine;
replacing the moisture separator
reheater shell and internals; replacing
the steam dryer; and other modifications
to upgrade the plant service water heat
removal system.
The sections below describe the nonradiological and radiological impacts to
the environment that may result from
the proposed EPU.
Non-Radiological Impacts
Land Use and Aesthetic Impacts
Potential land use and aesthetic
impacts from the proposed EPU include
impacts from plant modifications at the
GGNS site. The licensee states that any
land disturbance activities, including
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those associated with EPU, are reviewed
in accordance with Entergy procedures
to ensure that necessary environmental
protection measures are implemented
during the project. Entergy states that
these measures would include
provisions to protect such things as
threatened and endangered species,
cultural resources, wetland areas, water
quality, etc.
The licensee’s analysis concluded that
additional cooling tower make-up water
is projected to be needed (∼3,200 gallons
per minute (gpm)) due to the increase in
heat load generated as a result of the
EPU, which will also results in an
increase in water loss through
evaporation, blowdown, and drift. A
new radial well has been installed to
ensure sufficient cooling water is
available to support the higher EPU
power level because GGNS’s existing
radial wells have degraded over time
and thus cannot perform at their design
capacity. Activities to support the well
construction include clearing and
grubbing of trees, construction of a
working pad using engineered fill, and
excavation of trenches for supply piping
to the plant service water header,
discharge piping into the river, and
electrical equipment feeders. The
proposed working pad is designed to
contain all the equipment needed for
construction of the well and to provide
an area for material laydown and
parking. Activities conducted in
wetland areas would be managed under
a Section 404 permit issued by the
United States Army Corps of Engineers
(USACE). The remaining non-wetland
areas would be managed under
Mississippi Department of
Environmental Quality (MDEQ)
stormwater permitting program (Permit
Number MSR15) and associated best
management practices.
Improvements are also being made to
the Heavy Haul Road, which connects
the site to the barge slip area, to support
activities associated with the
installation of the new radial well and
potential delivery of heavy equipment
as discussed below. These
improvements consist of refurbishing
the existing road and road base in low
areas or areas that have become washed
out over the years. These refurbishment
activities would occur within the plant
site boundary with appropriate best
management practices applied and in
accordance with GGNS’ National
Pollutant Discharge Elimination System
(NPDES) Permit MSR000883 and
associated Stormwater Pollution
Prevention Plan to control silt and
erosion.
Entergy used the Port of Claiborne for
delivery of new transformers and other
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heavy equipment associated with the
proposed EPU. As such Entergy did not
need to conduct any dredging activities
in the existing barge slip area to
accommodate delivery of such
equipment.
While some plant components would
be modified, most changes related to the
proposed EPU would occur within
existing structures, buildings, and
fenced equipment yards housing major
components within the developed part
of the site. Existing parking lots, road
access, equipment lay-down areas,
offices, workshops, warehouses, and
restrooms would be used during plant
modifications. Therefore, land use
conditions would not change at the
GGNS site. Also, there would be no land
use changes along transmission line
corridors, and no new transmission
lines would be required.
Since land use conditions would not
change at the GGNS Unit 1 site, and
because any land disturbance would
occur within previously disturbed areas,
and those activities will be conducted in
accordance with State and Federal
permits to ensure the potential impacts
are not significant, there would be little
or no impact to aesthetic resources in
the vicinity of GGNS Unit 1. Therefore,
there would be no significant impact
from EPU-related plant modifications on
land use and aesthetic resources in the
vicinity of the GGNS Unit 1 site.
Air Quality Impacts
Major air pollution emission sources
at the GGNS site are regulated by the
MDEQ in accordance with GGNS Air
Permit 0420–00023. Nonradioactive
emission sources at GGNS Unit 1 result
primarily from periodic testing of diesel
generators and fire water pump diesel
engines, and operation of the cooling
towers. There will be no changes to the
emissions from these sources as a result
of the EPU.
Some minor and short duration air
quality impacts would occur during
implementation of the EPU at the GGNS
site. The main source of air emissions
would come from the vehicles driven by
outage workers needed to implement
the EPU. However, this source will be
short term and temporary. The majority
of the EPU activities would be
performed inside existing buildings and
would not cause additional atmospheric
emissions. Therefore, there would be no
significant impact on air quality during
and following implementation of the
proposed EPU.
The licensee also evaluated the
potential for an increase in particulate
emissions that could occur as a result of
the modification to the auxiliary cooling
tower and the addition of two 60-gallon
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lube oil tanks associated with the new
radial well pumps. These sources will
result in some minor emissions of
volatile organic compounds (VOC). By
letter dated September 9, 2011 (ADAMS
Accession No. ML112521284), the
licensee informed the NRC that based
on the determination that the
modification to increase circulating
water flow is not needed to support EPU
conditions, the particulate emissions
will not change significantly. In
addition, the emission impact due to the
lube oil tanks associated with the new
radial wells is minor. Therefore, no
change is required to the GGNS Air
Permit 0420–00023 to the MDEQ prior
to these activities occurring.
Upon completion of the proposed
EPU, non-radioactive air pollutant
emissions would increase slightly due
to the modification of the auxiliary
cooling tower and the addition of two
60-gallon lube oil tanks for the new
radial well pumps but will be regulated
in accordance with the GGNS Air
Permit with MDEQ and there would be
no significant impact on air quality in
the region during and following
implementation of the proposed EPU.
Water Use Impacts
Surface Water
The western boundary of the GGNS
site is defined by the Mississippi River’s
eastern bank. At the site, the Mississippi
River is about 0.5 miles wide at low
flow and about 1.4 miles during a
typical annual high flow period. The
massive nature of the Mississippi River
makes the liquid effluent discharges
from the GGNS facility undetectable
within the overall flow regime, and any
changes in the quality are small and
localized compared to the overall
volume of water in the river. Hamilton
and Gin are lakes on the GGNS site.
These lakes are what remain of the
former river channel after the
Mississippi River moved to the west.
Hamilton and Gin lakes are relatively
small (Hamilton Lake is approximately
64 acres, and Gin Lake is approximately
55 acres) and shallow with an average
depth of 8 to 10 feet. There is no
effluent discharged or water drawn from
these lakes for plant operations.
Limitations and monitoring
requirements for plant effluent
discharges are specified in the NPDES
Permit. Discharges directly to the
Mississippi River are required to be
monitored continuously. Modifications
of the nonradiological drain systems or
other systems conveying wastewaters
are not required for the EPU, and
biocide/chemical discharges would be
within existing permit limits. Although
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it is estimated that blowdown (the
release of liquid effluent to clean the
water in the system) would increase
slightly (∼825 gpm) based on
evaporation, the EPU is not introducing
any new contaminants or pollutants and
is not increasing the amount of those
potential contaminants presently
allowed for release by GGNS Unit 1.
Chemical and biocide wastes are
produced from processes used to control
the pH in the coolant, to control scale,
to control corrosion, and to clean and
defoul the condenser. These waste
liquids are typically combined with
cooling water discharges in accordance
with the site’s NPDES Permit
MS0029521. Sanitary wastewater from
all plant locations are regulated by
GGNS NPDES Permit MS0029521, and
flow to an onsite sewage treatment plant
prior to discharge into the Mississippi
River. Solids associated with treatment
of the sanitary wastewater are placed in
drying beds and then managed
appropriately for eventual offsite
disposal.
Surface water and wastewater
discharges are regulated by the MDEQ
via the NPDES permit. The permits are
reviewed by the MDEQ on a 5-year
basis. The current GGNS NPDES permit,
which has been administratively
continued by the MDEQ based on
Entergy’s timely submittal of the permit
renewal application, authorizes
discharges from 11 outfalls into the
Mississippi River. None of the NPDES
permit limits would require a
modification to support or implement
the EPU.
Total surface water withdrawals in
Claiborne County are predominantly for
agricultural use (livestock and
irrigation), with no surface water usage
reported for public supply, domestic
self-supplied systems, mining,
hydroelectric power, thermoelectric
power, or industrial or commercial uses.
The nearest downstream user of
Mississippi River water is the Southeast
Wood Fiber company located at the
Claiborne County Port facility, 0.8 miles
downstream of the GGNS site. The
maximum intake requirement for this
facility is less than 0.9 million gallons
per day (mgd). There are only three
public water supply systems in the State
of Mississippi that use surface water as
a source, and none of these are located
within 50 miles of the GGNS site.
Based on the above, the NRC staff
concludes that the proposed EPU will
not have a significant impact on surface
water in the area of GGNS, and
operation under EPU conditions would
not cause a water use conflict with other
surface water users in the GGNS area.
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Groundwater
There are 16 groundwater wells
currently used for withdrawal purposes
at the GGNS site. Groundwater is used
for domestic water, once-through
cooling for plant air conditioners, and
for regenerating the water softeners at
the Energy Services Center.
There are currently four radial wells
which supply water to the plant service
water system. Since additional cooling
tower make-up water is projected to be
needed (∼3,200 gpm) due to the increase
in heat load generated as a result of the
EPU, and an increase in water loss
through evaporation, blowdown, and
drift, a new radial well was installed to
provide additional water needed during
EPU operating conditions. The new
radial well was completed and made
operational during the spring 2012
refueling outage. As previously
discussed, the existing radial wells have
degraded over time and thus cannot
perform at their full design capacity.
Although water being utilized for
cooling tower make-up is projected to
increase from current levels, the
estimated EPU cooling tower makeup
flow value of 27,860 gpm (62 cubic feet
per second (cfs)) is less than the
estimated 42,636 gpm (95 cfs) value
identified in the GGNS FES; therefore,
groundwater consumption remains
lower than the value analyzed in the
GGNS FES.
Public water supply wells in
Claiborne County (excluding GGNS) are
supplied by the Catahoula Formation
with well depths ranging from 166 to
960 feet. Aside from GGNS Unit 1, the
primary use of groundwater in
Claiborne County is for public supply
purposes with a small percentage used
for domestic water, irrigation, and
livestock. Within a two-mile radius of
the plant site, essentially all
groundwater is used for domestic
purposes.
GGNS groundwater is supplied from
the Mississippi River Alluvium (radial
wells) and the Upland Complex (potable
wells) aquifers. Residents within the
vicinity of GGNS are served by CS&I
Water Association which withdraws
water from the Miocene aquifer. Since
the GGNS withdraws groundwater from
the Mississippi River Alluvium and
Upland Complex aquifers, the Miocene
aquifers, including the Catahoula
Formation, are unaffected.
The impact to offsite groundwater
users from the withdrawal of water by
GGNS Unit 1 is limited by the recharge
boundary created by the river, and thus,
is not expected to extend to the west
beyond the river. Based on estimates of
the radius of anticipated drawdown of
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41817
the GGNS radial wells, drawdown at the
GGNS property boundaries would have
minimal impact on potential offsite use
in the Mississippi River Alluvium
aquifer. This is a conservative estimate
of aquifer capacity impact, as aquifer
recharge from sources other than the
river (flooding and rainfall events) was
not considered. GGNS’s potable water
wells are the closest wells withdrawing
groundwater in the vicinity (although
not from the Mississippi River
Alluvium) and have operated to supply
adequate water supply to the GGNS site
without noticeable impact from the
operation of the radial wells. There are
no known withdrawals from the
Mississippi River Alluvium aquifer
other than GGNS Unit 1 between the Big
Black River to the north, and Bayou
Pierre River to the south.
Water rights and allocations of
groundwater are regulated by MDEQ.
Therefore, all existing GGNS Unit 1
groundwater withdrawals, including
those from the radial wells, are
regulated by a groundwater allocation
permitting program. These permits were
granted considering their identified
potential impact on other uses in the
area and considering those withdrawals
in the recharge area of the Mississippi
River Alluvium aquifer. Based on the
above, there are no groundwater use
conflicts between GGNS and other local
groundwater users.
Approximately 40 percent of the
GGNS site is bottomland, including
forested, shrub, and emergent marsh
wetlands. As stated above, the
groundwater in the alluvium in the
floodplain is in close hydraulic
communication with the river. The
groundwater contour figures reveal that
the impact of the cone of depression
surrounding the radial wells is
dependent upon river stage. This impact
is limited also by recharge to the
alluvium derived from infiltration of
precipitation, westward flow of
groundwater across the terrace alluvium
contact at the bluffs, and the flooding of
the Mississippi River during high river
stages. Thus, based on the localized
influence of the drawdown zone
surrounding the wells, the
groundwater’s hydraulic connection
with the river, recharge from seasonal
flooding and additional recharge from
the Upland Terrace aquifer east of the
bluffs, the impact of radial well
groundwater withdrawal in the
floodplain is of limited extent. Even
though there is potentially greater
impact to groundwater levels at the
lowest river stages than at higher river
stages, the low river stages are generally
temporary. Therefore, the impact of the
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radial wells on nearby wetlands is
minimal.
Plant operation at the proposed EPU
power level is not expected to cause
impacts significantly greater than
current operations. As previously
discussed, groundwater withdrawals
would continue to be lower than the
values analyzed in the GGNS FES as a
result of EPU and continued operational
activities. The installation of an
additional radial well is expected to
reduce the per-well withdrawal rates
without an increase in overall
groundwater impacts. No major
construction is planned, so additional
groundwater withdrawals will not be
required. Based on the above, the NRC
staff concludes that the EPU will not
have a significant impact on
groundwater in the underlying aquifers,
and operation under EPU conditions
would not cause a water use conflict
with other groundwater users in the
GGNS area.
Aquatic Resources Impacts
The potential impacts to aquatic biota
from the proposed action could include
thermal and chemical discharge effects.
GGNS does not have an intake structure
that withdraws surface water directly
from a body of water, therefore, no
entrainment or impingement of
organisms would occur.
GGNS uses groundwater from a series
of radial wells to supply its plant
service water system, as discussed in
the Water Use Impacts section. The
circulating water system is a closed
system utilizing a natural draft cooling
tower and a mechanical draft auxiliary
cooling tower. The natural draft cooling
tower is designed to operate alone or in
conjunction with the auxiliary cooling
tower to dissipate all excess heat
removed from the main condensers.
Additional cooling units will be added
to the auxiliary cooling tower, as
discussed in the Land Use and
Aesthetics section. Makeup water, to
compensate for drift, blowdown, and
evaporation losses from the cooling
towers, is supplied from the plant
service water system by means of the
radial wells. A new radial well will be
installed to handle the increase in heat
load associated with the EPU, as
discussed in the Water Use section.
The circulating water system is
designed to supply the main condenser
with cooling water at temperatures
ranging from 2.8 degrees Celsius (°C) (37
degrees Fahrenheit (°F)) to 36.1 °C (97
°F) when the mechanical draft auxiliary
cooling tower is not in service, and less
than 32.2 °C (90 °F) with the natural
draft and auxiliary cooling towers both
in service. The licensee states that the
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auxiliary cooling towers remain in
service year round, with the exception
of a short period (i.e., hours) when they
are taken out of service for cleaning.
Therefore, water being supplied to the
condenser is anticipated to be less than
32.2 °C (90 °F) year round.
Thermal effluents associated with
cooling tower blowdown are combined
with other plant effluents and
discharged into the Mississippi River.
The conditions associated with thermal
discharges as outlined in GGNS’s MDEQ
NPDES permit state that the receiving
water shall not exceed a maximum
water temperature change of 2.8 °C (5.0
°F) and that the maximum water
temperature shall not exceed 32.2 °C (90
°F), except when ambient temperatures
approach or exceed that number.
GGNS is required by the MDEQ
NPDES Permit to conduct thermal
monitoring during the winter and
summer months preceding the submittal
year of the permit renewal application
and include those results in the
submittal. Based on previous years of
operational experience, GGNS has not
violated the thermal conditions outlined
in the permit.
Based on the above, the NRC staff
concludes that although the heat load
would increase as a result of the
proposed EPU, the thermal discharge
associated with GGNS operations would
continue to remain at or slightly below
current operating temperatures due to
the additional cooling units being
installed in the auxiliary cooling tower.
As stated by the licensee, the auxiliary
cooling towers operate in conjunction
with the natural draft cooling tower year
round. Consequently, the temperature of
the cooling water being supplied to the
condenser is not increasing, which
ensures that the thermal conditions
outlined in the GGNS MDEQ NPDES
permit continue to be met. Therefore,
the NRC staff concludes there would be
no significant adverse impacts to
aquatic biota from thermal discharges.
The plant service water system for
GGNS is treated with sodium
hypochlorite and biocides to control the
pH in the coolant, to control scale, to
control corrosion, and to clean and
defoul the condenser. The liquid wastes
produced from this process are
combined with cooling water discharges
in accordance with the site’s MDEQ
NPDES permit and discharged into the
Mississippi River. Due to the additional
cooling units being added to the
auxiliary cooling tower, additional
sodium hypochlorite injection will be
needed to control biological fouling
effectively. However, the liquid waste
stream is dechlorinated with sodium
bisulfite prior to being discharged to the
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Mississippi River. Consequently,
effluent concentrations would be
slightly higher but continue to be below
the NPDES permit limits specified by
MDEQ. The licensee has noted that it
will maintain compliance with the
MDEQ NPDES permit held currently by
the plant as a function of the proposed
EPU. Therefore, the NRC staff concludes
there would be no significant adverse
impacts to aquatic biota from chemical
discharges.
As the delivery of transformers and
other heavy equipment associated with
the proposed EPU were made at the
Claiborne County Port facility, no
dredging activities were needed at the
existing barge slip area.
Terrestrial Resources Impacts
The GGNS site is bisected by a
prominent bluff line that runs parallel to
the Mississippi River. Areas below the
bluff line are seasonally flooded, except
for two oxbow lakes which are
permanently inundated and are
considered wetland areas. Above the
bluff line, the two prominent habitat
types are upland field and upland forest
with the vast majority upland forest.
One small area of wetland has been
defined on the north side of the plant as
permanently flooded. Most of the
previously developed areas are in
upland habitat; however, approximately
400 acres of upland forest remains onsite.
The impacts that could potentially
affect terrestrial resources include loss
of habitat, construction and
refurbishment-related noise and
lighting, and sediment transport or
erosion. Most of the activities associated
with the EPU would occur on the
developed portion of the site, would not
directly affect any natural terrestrial
habitats, and would not result in loss of
habitat. As discussed in Land Use and
Aesthetic Impacts section above,
activities associated with installation of
the new radial well would be managed
in accordance with the Section 404
Permit and MDEQ’s stormwater
permitting program (Permit Number
MSR15), as appropriate. Although there
is no habitat present on the Heavy Haul
Road, refurbishment activities
associated with the road would be
managed in accordance with the terms
and conditions in State and Federal
permits. Noise and lighting would not
impact terrestrial species beyond what
would be experienced during normal
operations because refurbishment and
construction activities would take place
during outage periods, which are
already periods of heightened activity.
Based on the above, the NRC staff
concludes that the proposed EPU would
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have no significant effect on terrestrial
resources.
Threatened and Endangered Species
Impacts
The licensee corresponded with the
U.S. Fish and Wildlife Service (USFWS)
during the preparation of the
Environmental Report for the EPU to
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ensure that the proposed EPU would not
adversely affect any species protected
under the Endangered Species Act. The
following Table 1 identifies federally
listed and candidate species that are in
the vicinity of GGNS Unit 1.
TABLE 1—FEDERALLY LISTED SPECIES IN THE VICINITY OF GGNS UNIT 1
Name
Status (a)
red-cockaded woodpecker .........................................................
least tern (interior pop.) .............................................................
E
E
fat pocketbook ............................................................................
rabbitsfoot ..................................................................................
E
C
bayou darter ...............................................................................
gulf sturgeon ..............................................................................
pallid sturgeon ............................................................................
T
T
E
Louisiana black bear ..................................................................
T
Scientific
Birds:
Picoides borealis ..................................................................
Sterna antillarum ..................................................................
Clams:
Potamilus capax ..................................................................
Quadrula cylindrica cylindrica ..............................................
Fish:
Etheostoma rubrum .............................................................
Acipenser oxyrinchus desoto ...............................................
Scaphirhynchus albus ..........................................................
Mammals:
Ursus americanus luteolus ..................................................
(a)
C = candidate; E = endangered; T = threatened
Data source: [FWS] U.S. Fish and Wildlife Service. 2011. Find Endangered Species Database. Available at https://www.fws.gov/endangered/
(accessed 13 December 2011).
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As discussed in the Land Use and
Aesthetic Impacts section, the only EPU
activities involving land disturbance are
the installation of a new radial well and
Heavy Haul Road improvements. These
activities would be handled in
accordance with the terms and
conditions in State and Federal permits.
The licensee states that procedures
are in place at GGNS Unit 1 to ensure
that threatened and endangered species
would be adequately protected, if
present, during the outage and during
plant operations. Any traffic and worker
activity on the plant site during its 2012
refueling outage would be on the
developed portion of the site and would
not affect any federally listed species.
As stated above, the licensee
consulted with the USFWS regarding
threatened and endangered species in
the vicinity of GGNS Unit 1. No issues
were identified that would impact any
of the federally listed species as a result
of the proposed EPU. Therefore, the
NRC staff concludes that the proposed
EPU would have no significant impacts
on any Federally listed threatened or
endangered species for the proposed
action.
Historic and Archaeological Resources
Impacts
The licensee states that at the
recommendation of the Mississippi
Department of Archives and History
(MDAH), a Phase I archaeological
survey was conducted in 2007 on two
onsite study areas. Eleven
archaeological sites and eight isolated
finds/small artifact scatters were
identified during this survey. One
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historic site within the study area and
located south of the plant in a wooded
area, was identified as having the
potential to be eligible for the National
Register of Historic Places (NRHP). The
remaining sites were determined to be
ineligible for listing on the NRHP. The
MDAH required no further actions from
GGNS provided that no construction
activities occurred in this specific area.
As discussed in Land Use and
Aesthetic Impacts section, the only EPU
activities involving land disturbance is
the installation of a new radial well and
Heavy Haul Road improvements.
Entergy has a procedure in place,
applicable to all of its power plants, for
management of cultural resources ahead
of any future ground-disturbing
activities. This procedure, which
requires reviews, investigations, and
consultations, as needed, ensures that
existing or potentially existing cultural
resources are adequately protected and
assists Entergy in meeting State and
Federal expectations.
As previously discussed, EPU-related
plant modifications would take place
within existing buildings and facilities
at GGNS, except for the addition of the
cooling units being added to the
auxiliary cooling tower which will be
installed on an existing foundation.
Since ground disturbance or
construction-related activities would
not occur in any areas with the potential
to be eligible for the NRHP, and that
Entergy has procedures in place for
management of cultural resources, the
NRC staff concludes that there would be
no significant impact from the proposed
EPU on historic and archaeological
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Sfmt 4703
resources in the vicinity of GGNS Unit
1.
Socioeconomic Impacts
Potential socioeconomic impacts from
the proposed EPU include temporary
increases in the size of the workforce at
GGNS, and the associated increased
demand for goods, public services, and
housing in the region. The proposed
EPU also could generate increased tax
revenues for the State and surrounding
counties.
Currently, approximately 690 fulltime employees work at GGNS. During
regularly scheduled refueling outages,
the workforce is typically increased by
additional 700–900 persons. Refueling
outages usually last 25–30 days every 18
months, although GGNS plans to change
to a 24-month refueling cycle in the
future. Entergy estimates that operating
at the proposed EPU power level would
not affect the size of the regular
workforce. The 2012 outage workforce
will be larger than previous outages due
to the EPU modifications but would be
of short duration. Once EPU-related
plant modifications have been
completed, the size of the refueling
outage workforce at GGNS would return
to normal levels and would remain
similar to pre-EPU levels, with no
significant increases during future
refueling outages. Entergy expects most
of the temporary workers expected for
the EPU related work will temporarily
reside in Claiborne County. This will
result in short-term increases in the
local population along with increased
demands for public services and
housing. Because plant modification
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work would be short term and
temporary, most workers are expected to
stay in available rental homes,
apartments, mobile homes, and campertrailers. The 2010 American Community
Survey 1-year estimate for vacant
housing units reported 783 vacant
housing units in Claiborne County; that
could potentially ease the demand for
local rental housing. Therefore, the NRC
expects that the temporary increase in
plant employment for a short duration
would have little or no noticeable effect
on the availability of housing in the
region.
The additional number of outage
workers and material and equipment
deliveries needed to support EPUrelated plant modifications would cause
short-term level of service impacts
(restricted traffic flow and higher
incident rates) on secondary roads in
the immediate vicinity of GGNS. As
EPU-related plant modifications would
occur during a normal refueling outage,
there could be noticeable short-term
(during certain hours of the day), levelof-service traffic impacts beyond what is
experienced during normal outages.
Nuclear power plants in Mississippi
currently pay the Mississippi
Department of Revenue a sum based on
the assessed value of the plant. Based
upon this assessment, nuclear power
plants are then taxed 2 percent of its
assessed value, or a maximum of
$20,000,000. GGNS currently pays
$20,000,000 annually to the Mississippi
Department of Revenue. Tax revenue is
distributed in proportion to the amount
of electric energy consumed by the retail
customers in each county, with no
county receiving an excess of 20 percent
of the funds. Ten percent of the
remainder of the tax payment is then
transferred from the Mississippi
Department of Revenue to the General
Fund of the State. The increased
property value of GGNS as a result of
the EPU and increased power generation
could affect future tax payments by
GGNS.
Due to the short duration of EPUrelated plant modification activities,
there would be little or no noticeable
effect on tax revenues generated by
temporary workers residing in Claiborne
County. In addition, GGNS is currently
paying the maximum tax on the
assessed value of the plant. Therefore,
the NRC expects no significant
socioeconomic impacts from EPUrelated plant modifications and
operations under EPU conditions in the
vicinity of GGNS.
Environmental Justice Impacts
The environmental justice impact
analysis evaluates the potential for
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disproportionately high and adverse
human health and environmental effects
on minority and low-income
populations that could result from
activities associated with the proposed
EPU at GGNS. Such effects may include
human health, biological, cultural,
economic, or social impacts. Minority
and low-income populations are subsets
of the general public residing around
GGNS, and all are exposed to the same
health and environmental effects
generated from activities at GGNS.
NRC considered the demographic
composition of the area within a 50-mile
(mi) (80.5-kilometer (km)) radius of
GGNS to determine whether minorities
may be affected by the proposed action.
The NRC examined the distribution of
minority populations within 50 mi (80.5
km) of GGNS using the U.S. Census
Bureau (USCB) data for 2010.
According to the 2010 Census data
using the University of Missouri’s
Circular Area Profiling System, an
estimated 316,387 people live within a
50-mi (80.5-km) radius of GGNS.
Minority populations within 50 mi (80.5
km) comprise 53.2 percent (168,166
persons). The largest minority group
was Black or African-American
(approximately 157,707 persons or 49.8
percent), followed by Hispanic or Latino
(of any race) (approximately 6,115
persons or 1.9 percent). Minority
populations within Claiborne County
comprise 85.2 percent of the total
population with the largest minority
group being Black or African-American
at 84.6 percent.
NRC examined low-income
populations within Claiborne County
using the 2006–2010 American
Community Survey 5-Year Estimates.
According to census data,
approximately 35 percent of the
population (3,186 individuals) residing
within Claiborne County was
considered low-income, defined as
living below the 2010 Federal poverty
threshold. Approximately 27.6 percent
of families were determined to be living
below the Federal poverty threshold in
Claiborne. The 2010 Federal poverty
threshold was $22,314 for a family of
four and $11,139 for an individual. The
median household income for Claiborne
County was approximately $24,150,
which is 51 percent lower than the
median household income
(approximately $47,031) for Mississippi.
Potential impacts to minority and
low-income populations would mostly
consist of environmental and
socioeconomic effects (e.g., noise, dust,
traffic, employment, and housing
impacts). Radiation doses from plant
operations after the EPU are expected to
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continue to remain well below
regulatory limits.
Noise and dust impacts would be
temporary and limited to onsite
activities. Minority and low-income
populations residing along site access
roads could experience increased
commuter vehicle traffic during shift
changes. Increased demand for
inexpensive rental housing during the
EPU-related plant modifications could
disproportionately affect low-income
populations; however, due to the short
duration of the EPU-related work and
the availability of housing properties,
impacts to minority and low-income
populations would be of short duration
and limited. According to the 2010
census information, there were
approximately 783 vacant housing units
in Claiborne County.
Based on this information and the
analysis of human health and
environmental impacts presented in this
EA, the proposed EPU would not have
disproportionately high and adverse
human health and environmental effects
on minority and low-income
populations residing in the GGNS
vicinity.
Non-Radiological Cumulative Impacts
The NRC considered potential
cumulative impacts on the environment
resulting from the incremental impact of
the proposed EPU when added to other
past, present, and reasonably
foreseeable future actions. For the
purposes of this analysis, past actions
include the construction and licensing
of GGNS Unit 1. Present actions include
operations and maintenance activities
associated with operations under the
current NRC operating license through
the date of that license’s expiration
(November 1, 2024). Reasonably
foreseeable future actions are discussed
below.
Entergy submitted an application to
the NRC for license renewal on October
28, 2011 (ADAMS Accession No.
ML113080132). The NRC is currently in
the process of reviewing this application
and intends to publish a draft
supplement to NUREG–1437, ‘‘Generic
Environmental Impact Statement for
License Renewal of Nuclear Plants,’’ in
December 2012. If the NRC grants
Entergy a new license, that license
would authorize Entergy to operate
GGNS Unit 1 for an additional 20 years
(through November 1, 2044). For
purposes of this analysis, the proposed
license renewal is considered a
reasonably foreseeable future action. In
its Environmental Report for the
proposed license renewal, Entergy
concludes that cumulative impacts
during the proposed license renewal
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term would be small to moderate for
land use and ecological resources but
that these impacts would be effectively
mitigated. Cumulative impacts to air
quality and socioeconomics would be
beneficial and small to moderate in
scale, and the impacts to the remaining
resources areas would be small.
However, the draft supplement to
NUREG–1437 will document the NRC’s
independent National Environmental
Policy Act (NEPA) analysis and
consider potential cumulative impacts
of the proposed license renewal.
Entergy submitted a combined license
(COL) application to the NRC for an
Economic Simplified Boiling Water
Reactor (designated as ‘‘Grand Gulf,
Unit 3’’) on February 27, 2008 (ADAMS
Accession No. ML083570119). Entergy’s
COL application submission does not
commit Entergy to build a new nuclear
power unit; the application also does
not constitute NRC’s approval of the
proposal. The NRC initiated a NEPA
review as part of the review of Entergy’s
COL application. However, on January
9, 2009 (ADAMS Accession No.
ML090130174), Entergy informed the
NRC that it was considering alternate
reactor design technologies and
requested that the NRC stop its COL
application review until further notice.
The NRC suspended its review
associated with the COL application
(including the NEPA review) and, to
date, has not resumed that review. The
NRC was in the process of preparing an
environmental impact statement (EIS) to
evaluate the environmental impacts of
the proposed Grand Gulf, Unit 3.
However, because the review was
suspended, the NRC did not publish the
EIS. At this time, NRC does not consider
licensing of Grand Gulf, Unit 3 to be a
reasonably foreseeable future action
because Entergy has not requested NRC
to reinitiate its COL review to date. If in
the future, Entergy submits a revised
reactor design to the NRC for Grand
Gulf, Unit 3, the NRC will evaluate the
merits of that COL application and will
decide whether to approve or deny the
license after considering and evaluating
the environmental and safety
implications of the proposal. The
environmental impacts of constructing
and operating a new unit will depend
on the unit’s actual design
characteristics, construction plans, and
operations procedures. These impacts,
including cumulative impacts, would be
assessed by the NRC in a separate NEPA
document.
Previous to the COL application, the
NRC issued an Early Site Permit (ESP)
for Grand Gulf on April 5, 2007
(ADAMS Accession No. ML070780457).
Entergy submitted its ESP application
for the Grand Gulf site to the NRC on
October 16, 2003 (ADAMS Accession
No. ML032960373). The NRC published
NUREG–1817, ‘‘Environmental Impact
Statement for an Early Site Permit (ESP)
41821
at the Grand Gulf ESP Site, Final
Report,’’ in April 2006 (ADAMS
Accession No. ML060900037), to
document its NEPA analysis associated
with the ESP application review.
Chapter 7 of NUREG–1817 addresses
cumulative impacts and concludes that
impacts would range from small to
moderate depending on the particular
resource area, but that in several cases
(land use, water use and water quality,
terrestrial ecosystems, nonradiological
health, radiological impacts of operation
of non-light-water reactor designs, and
decommissioning), information was not
available to determine the level of
impact. In these cases, the NRC noted
that a future COL application would be
required for the staff to determine the
specific impacts based on proposed
design characteristics, construction
plans, and operations procedures.
However, as discussed above, Entergy
has requested that NRC suspend its COL
application review, and thus, NRC does
not have the information required to
make determinations on the cumulative
impacts that would result from a new
reactor.
Non-Radiological Impacts Summary
As previously discussed, the
proposed EPU would not result in any
significant non-radiological impacts.
Table 2 summarizes the nonradiological environmental impacts of
the proposed EPU at GGNS.
TABLE 2—SUMMARY OF NON-RADIOLOGICAL ENVIRONMENTAL IMPACTS
Land Use .......................................................
Air Quality ......................................................
Water Use .....................................................
Aquatic Resources ........................................
Terrestrial Resources ....................................
Threatened and Endangered Species ..........
Historic and Archaeological Resources ........
Socioeconomics ............................................
Environmental Justice ...................................
Cumulative Impacts .......................................
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Radiological Impacts
Radioactive Gaseous and Liquid
Effluents and Solid Waste
GGNS Unit 1 uses waste treatment
systems to collect, process, recycle, and
dispose of gaseous, liquid, and solid
wastes that contain radioactive material
in a safe and controlled manner within
NRC and EPA radiation safety
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The proposed EPU is not expected to cause a significant impact on land use conditions and aesthetic resources in the vicinity of the GGNS.
The proposed EPU is not expected to cause a significant impact to air quality.
The proposed EPU is not expected to cause impacts significantly greater than current operations.
No significant impact on groundwater or surface water resources.
The proposed EPU is not expected to cause impacts significantly greater than current operations.
No significant impact to aquatic resources due to additional chemical or thermal discharges.
The proposed EPU is not expected to cause impacts significantly greater than current operations.
No significant impact to terrestrial resources.
The proposed EPU would have no effect on Federally threatened and endangered species.
The proposed EPU would have no significant impact to historic and archaeological resources on
site or in the vicinity of the GGNS.
The proposed EPU would have no significant socioeconomic impacts from EPU-related temporary
increase in workforce.
The proposed EPU would have no disproportionately high and adverse human health and environmental effects on minority and low-income populations in the vicinity of the GGNS site.
The proposed EPU would not cause impacts significantly greater than current operations.
standards. The licensee’s evaluation of
plant operation under the proposed EPU
conditions shows that no physical
changes would be needed to the
radioactive gaseous, liquid, or solid
waste systems.
Radioactive Gaseous Effluents
The gaseous waste management
systems include the ventilation systems
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of normally and potentially radioactive
components, building ventilation
systems, the off-gas system, and the
mechanical vacuum pump system. The
licensee’s evaluation concluded that the
proposed EPU is expected to increase
the production and activity of gaseous
effluents approximately 13 percent;
however, the increase would be below
the design basis values the system is
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designed to handle. The licensee’s
evaluation concluded that the proposed
EPU would not change the radioactive
gaseous waste system’s design function
and reliability to safely control and
process the waste. The projected
gaseous releases following
implementation of the EPU would
remain within the values analyzed in
the FES for GGNS Unit 1. The existing
equipment and plant procedures that
control radioactive releases to the
environment will continue to be used to
maintain radioactive gaseous releases
within the dose limits of 10 CFR
20.1302 and the as low as is reasonably
achievable (ALARA) dose objectives in
Appendix I to 10 CFR part 50.
Radioactive Liquid Effluents
The liquid waste management system
collects, processes, and prepares
radioactive liquid waste for disposal.
Radioactive liquid wastes include
liquids from various equipment drains,
floor drains, chemical wastes, and
miscellaneous plant equipment
subsystems, and alternative liquid
radioactive waste processing equipment.
Entergy is installing a condensate full
flow filter (CFFF)—iron control system
upstream of the condensate
demineralizers to reduce the corrosion
product loading on the demineralizer
resins. The addition of iron control to
the CFFF would prevent iron from being
deposited on the demineralization resin.
The amount of liquid waste generated
by the condensate demineralizer system
is expected to remain unchanged or
even decrease. The licensee’s evaluation
shows that the proposed EPU
implementation would not significantly
increase the inventory of liquid
normally processed by the liquid waste
management system. This is because the
system functions are not changing, and
the volume inputs remain the same. The
proposed EPU would result in a 13
percent increase in the equilibrium
radioactivity in the reactor coolant
which in turn would impact the
concentrations of radioactive nuclides
in the liquid waste disposal systems.
Since the composition of the
radioactive material in the waste and
the volume of radioactive material
processed through the system are not
expected to significantly change, the
current design and operation of the
radioactive liquid waste system will
accommodate the effects of the
proposed EPU. The projected liquid
effluent release following EPU
implementation would remain within
the values analyzed in the FES for
GGNS Unit 1. The existing equipment
and plant procedures that control
radioactive releases to the environment
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will continue to be used to maintain
radioactive liquid releases within the
dose limits of 10 CFR 20.1302 and
ALARA dose standards in Appendix I to
10 CFR part 50.
Radioactive Solid Wastes
The solid radwaste system is designed
to provide solidification and packaging
for radioactive wastes that are produced
during shutdown, startup, and normal
operation, and to store these wastes
until they are shipped offsite for burial.
Solid radwaste is processed on a batch
basis and would increase slightly,
resulting in an increase in batch
processing. The licensee’s evaluation
concluded that the annual volume of
solid waste is expected to increase from
152.83 cubic meters (m3) at current
licensed thermal power to 153.65 m3
per year, or 0.82 m3 per year. Although
EPU implementation increases the
amount of solid waste produced, the
design capability of the solid radwaste
system and the total volume capacity for
handling solid waste are unaffected, and
the system will be able to handle the
additional waste without any
modifications. The equipment is
designed and operated to process the
waste into a form that minimizes
potential harm to the workers and the
environment. Waste processing areas are
monitored for radiation, and there are
safety features to ensure worker doses
are maintained within regulatory limits.
The proposed EPU would not generate
a new type of waste or create a new
waste stream.
The licensee manages low level
radioactive waste (LLRW) contractually
with an offsite vendor and expects to
continue to ship LLRW offsite for
processing and disposal. Entergy
currently transports radioactive waste to
licensed processing facilities in
Tennessee, including Duratek (owned
by EnergySolutions) or Race (owned by
Studsvik), where the wastes are
processed prior to being sent for
disposal at EnergySolutions in Clive,
Utah.
Based on the above, the NRC staff
concludes that the impact from the
proposed EPU on the management of
radioactive solid waste would not be
significant.
Occupational Radiation Dose at EPU
Power Levels
The licensee stated that the in-plant
radiation sources are expected to
increase approximately linearly with the
proposed increase in core power level.
To protect the workers, the licensee’s
radiation protection program monitors
radiation levels throughout the plant to
establish appropriate work controls,
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Fmt 4703
Sfmt 4703
training, temporary shielding, and
protective equipment requirements so
that worker doses will remain within
the dose limits of 10 CFR part 20 and
ALARA.
The licensee states that GGNS Unit 1
has been designed using an extremely
conservative basis for water and steam
radionuclide concentrations such that
changes in actual concentrations as a
result of EPU are well within the
original design limits. Inside
containment, the radiation levels near
the reactor vessel are assumed to
increase by 13 percent. However, the
reactor vessel is inaccessible during
operation, and because of the margin in
the shielding around the reactor vessel,
an increase of 13 percent would not
measurably increase occupational doses
during power operation. The radiation
levels due to spent fuel are anticipated
to increase by 13 percent. Expected
increases in these values would occur
primarily in fuel handling operations
during refueling outages. However, a
review of existing radiation zoning
design concluded that no changes in the
radiation zone designations or shielding
requirements would need to be made as
a result of EPU, and operation under
EPU conditions would have no
significant effect on occupational and
onsite radiation exposure.
Based on the above, the NRC staff
concludes that the proposed EPU is not
expected to significantly affect radiation
levels within the plants and, therefore,
there would not be a significant
radiological impact to the workers.
Offsite Doses at EPU Power Levels
The licensee states that normal
operational gaseous activity levels may
increase slightly. The increase in
activity levels is generally proportional
to the percentage increase in core
thermal power, which is approximately
13 percent. However, this slight increase
does not affect the large margin to the
offsite dose limits established by 10 CFR
part 20, allowing GGNS to operate well
below the regulatory limits even at the
higher power level.
The sources of offsite dose to
members of the public from GGNS Unit
1 are radioactive gaseous and liquid
effluents and direct radiation. As
previously discussed, operation at the
proposed EPU conditions will not
change the radioactive waste
management systems’ abilities to
perform their intended functions. Also,
there would be no change to the
radiation monitoring system and
procedures used to control the release of
radioactive effluents in accordance with
NRC radiation protection standards in
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Federal Register / Vol. 77, No. 136 / Monday, July 16, 2012 / Notices
10 CFR part 20 and Appendix I to 10
CFR part 50.
Based on the above, the NRC staff
concluded that the offsite radiation dose
to members of the public from the
proposed EPU would continue to be
within the NRC and EPA regulatory
limits.
Spent Nuclear Fuel
Spent fuel from GGNS Unit 1 is stored
in the plant’s spent fuel pool and in dry
casks in the independent spent fuel
storage installation. The current typical
average enrichment of a batch of fuel at
GGNS is approximately 4 percent by
weight uranium-235. The additional
energy requirements for the EPU are met
by an increase in fuel enrichment, an
increase in the reload fuel batch size,
and/or changes in the fuel loading
pattern to maintain the desired plant
operating cycle length. The equilibrium
core evaluated for the EPU has an
average enrichment well below 4.5
percent uranium-235 by weight.
Entergy’s EPU evaluation also
considered a possible future change to
a 24-month refueling cycle; the
combination of the EPU and the longer
cycle length could result in an increase
in fuel bundle assembly size from 312
to about 380 assemblies. The maximum
average burnup level of any fuel rod
would continue to be less than 62,000
megawatt-days per metric tonne (MWd/
MTU), and reload design goals would
maintain the GGNS Unit 1 fuel cycles
within the burnup and enrichment
limits bounded by the impacts analyzed
in 10 CFR part 51, Table S–3—Table of
Uranium Fuel Cycle Environmental
Data, and Table S–4—Environmental
Impact of Transportation of Fuel and
Waste to and from One Light-WaterCooled Nuclear Power Reactor, as
supplemented by NUREG–1437,
Volume 1, Addendum 1, ‘‘Generic
Environmental Impact Statement for
License Renewal of Nuclear Plants,
Main Report. Section 6.3—
Transportation Table 9.1, Summary of
findings on NEPA issues for license
renewal of nuclear power plants.’’
Therefore, the NRC staff concludes that
there would be no significant impacts
resulting from spent nuclear fuel.
Postulated Design-Basis Accident Doses
Postulated design-basis accidents are
evaluated by both the licensee and the
NRC to ensure that GGNS Unit 1 can
withstand normal and abnormal
transients and a broad spectrum of
postulated accidents without undue
hazard to the health and safety of the
public.
The NRC staff is reviewing the
applicant’s analyses to independently
verify the applicant’s calculated doses
under accident conditions. The NRC
staff’s evaluation results will be
contained in the safety evaluation that
will be issued concurrently with the
proposed EPU amendment, if so
approved by the NRC staff. However, for
the purpose of this EA, the NRC staff
concludes that, based on the
information provided by the licensee,
the proposed EPU would not
significantly increase the radiological
consequences of postulated accidents.
Radiological Cumulative Impacts
The radiological dose limits for
protection of the public and workers
have been developed by the NRC and
EPA to address the cumulative impact
of acute and long-term exposure to
radiation and radioactive material.
These dose limits are codified in 10 CFR
part 20 and 40 CFR part 190.
The cumulative radiation dose to the
public and workers are required to be
within the limits set forth in the
regulations cited above. The public dose
limit of 25 millirem (mrem) (0.25
millisievert (mSv)) in 40 CFR part 190
applies to all reactors that may be on a
site and also includes any other nearby
nuclear facilities. Currently, there is no
other nuclear power reactor or uranium
fuel cycle facility located near GGNS
Unit 1. However, as previously
discussed, Entergy is considering the
construction of an additional nuclear
41823
power reactor at the GGNS site. The
NRC staff reviewed several years of
radiation dose data contained in the
licensee’s annual radioactive effluent
release reports for GGNS Unit 1. The
data demonstrate that the dose to
members of the public from radioactive
effluents is within the limits of 10 CFR
part 20 and 40 CFR part 190. To
evaluate the projected dose at EPU
power levels for GGNS Unit 1, the NRC
staff increased the actual dose data
contained in the reports by 13 percent.
The projected doses for GGNS Unit 1 at
EPU power level remained within
regulatory limits. The NRC staff expects
continued compliance with NRC’s and
EPA’s public dose limits during
operation at the proposed EPU power
level and at the proposed new reactor,
if it is constructed and operated.
Therefore, the NRC staff concludes that
there would not be a significant
cumulative radiological impact to
members of the public from increased
radioactive effluents from GGNS Unit 1
at the proposed EPU operation and the
proposed new reactor.
As previously discussed, the licensee
has a radiation protection program that
maintains worker doses within the dose
limits in 10 CFR part 20 during all
phases of GGNS Unit 1 operations. The
NRC staff expects continued compliance
with NRC’s occupational dose limits
during operation at the proposed EPU
power level and at the proposed new
reactor, if it is constructed and operated.
Therefore, the NRC staff concludes
that operation of GGNS Unit 1 at the
proposed EPU power level and the
proposed new reactor would not result
in a significant impact to the worker’s
cumulative radiological dose.
Radiological Impacts Summary
As discussed above, the proposed
EPU would not result in any significant
radiological impacts. Table 3
summarizes the radiological
environmental impacts of the proposed
EPU at GGNS Unit 1.
TABLE 3—SUMMARY OF RADIOLOGICAL ENVIRONMENTAL IMPACTS
Radioactive Gaseous Effluents ..........................
srobinson on DSK4SPTVN1PROD with NOTICES
Radioactive Liquid Effluents ...............................
Occupational Radiation Doses ...........................
Offsite Radiation Doses ......................................
Radioactive Solid Waste .....................................
Spent Nuclear Fuel .............................................
Postulated Design-Basis Accident Doses ..........
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Amount of additional radioactive gaseous effluents generated would be handled by the existing
system.
Amount of additional radioactive liquid effluents generated would be handled by the existing
system.
Occupational doses would continue to be maintained within NRC limits.
Radiation doses to members of the public would remain below NRC and EPA radiation protection standards.
Amount of additional radioactive solid waste generated would be handled by the existing system.
The spent fuel characteristics will remain within the bounding criteria used in the impact analysis in 10 CFR part 51, Table S–3, and Table S–4.
Calculated doses for postulated design-basis accidents would remain within NRC limits.
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Fmt 4703
Sfmt 4703
E:\FR\FM\16JYN1.SGM
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41824
Federal Register / Vol. 77, No. 136 / Monday, July 16, 2012 / Notices
TABLE 3—SUMMARY OF RADIOLOGICAL ENVIRONMENTAL IMPACTS—Continued
Cumulative Radiological .....................................
Alternatives to the Proposed Action
As an alternative to the proposed
action, the NRC staff considered denial
of the proposed EPU (i.e., the ‘‘noaction’’ alternative). Denial of the
application would result in no change
in the current environmental impacts.
However, if the EPU were not approved
for GGNS Unit 1, other agencies and
electric power organizations may be
required to pursue other means, such as
fossil fuel or alternative fuel power
generation, to provide electric
generation capacity to offset future
demand. Construction and operation of
such a fossil-fueled or alternative-fueled
plant could result in impacts in air
quality, land use, and waste
management greater than those
identified for the proposed EPU for
GGNS Unit 1.
Alternative Use of Resources
The action does not involve the use of
any different resources than those
previously considered in the GGNS FES.
III. Finding of No Significant Impact
srobinson on DSK4SPTVN1PROD with NOTICES
On the basis of the details provided in
the EA, the NRC concludes that granting
the proposed EPU license amendment is
not expected to cause impacts
significantly greater than current
operations. Therefore, the proposed
action of implementing the EPU for
GGNS Unit 1 will not have a significant
effect on the quality of the human
environment because no significant
permanent changes are involved, and
the temporary impacts are within
previously disturbed areas at the site
and the capacity of the plant systems.
As discussed in the EA, if any new land
disturbances are required to support the
proposed EPU, those activities will be
conducted in accordance with State and
Federal permits to ensure the potential
impacts are not significant. Accordingly,
the NRC has determined not to prepare
an environmental impact statement for
the proposed action.
For the Nuclear Regulatory Commission.
Dated at Rockville, Maryland, this 9th day
of July 2012.
Michael T. Markley,
Chief, Plant Licensing Branch IV, Division
of Operating Reactor Licensing, Office of
Nuclear Reactor Regulation.
Radiation doses to the public and plant workers would remain below NRC and EPA radiation
protection standards.
SECURITIES AND EXCHANGE
COMMISSION
[Release No. 34–67371; File No. SR–
NYSEMKT–2012–04]
Self-Regulatory Organizations; NYSE
MKT LLC; Notice of Filing and
Immediate Effectiveness of Proposed
Rule Change Deleting NYSE MKT LLC
Rule 428(a), Which Addresses
Telephone Solicitation, and Amending
NYSE MKT LLC Rule 429, Which
Addresses Telemarketing, To Adopt
New Rule Text To Conform to FINRA’s
Telemarketing Rule
July 10, 2012.
Pursuant to Section 19(b)(1) 1 of the
Securities Exchange Act of 1934 (the ’’
Exchange Act’’) 2 and Rule 19b–4
thereunder,3 notice is hereby given that
on June 25, 2012, NYSE MKT LLC (the
‘‘Exchange’’ or ‘‘NYSE MKT’’) filed with
the Securities and Exchange
Commission (the ‘‘Commission’’) the
proposed rule change as described in
Items I, II and III below, which Items
have been prepared by the Exchange.
The Commission is publishing this
notice to solicit comments on the
proposed rule change from interested
persons.
I. Self-Regulatory Organization’s
Statement of the Terms of Substance of
the Proposed Rule Change
The Exchange proposes to delete Rule
428(a), which addresses telephone
solicitation, and amend Rule 429, which
addresses telemarketing, to adopt new
rule text that is substantially similar to
FINRA Rule 3230. The text of the
proposed rule change is available on the
Exchange’s Web site at www.nyse.com,
at the principal office of the Exchange,
and at the Commission’s Public
Reference Room.
II. Self-Regulatory Organization’s
Statement of the Purpose of, and
Statutory Basis for, the Proposed Rule
Change
In its filing with the Commission, the
Exchange included statements
concerning the purpose of, and basis for,
the proposed rule change and discussed
any comments it received on the
proposed rule change. The text of those
statements may be examined at the
[FR Doc. 2012–17228 Filed 7–13–12; 8:45 am]
16:32 Jul 13, 2012
Jkt 226001
U.S.C. 78s(b)(1).
U.S.C. 78a.
3 17 CFR 240.19b–4.
2 15
BILLING CODE 7590–01–P
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1 15
PO 00000
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Fmt 4703
Sfmt 4703
places specified in Item IV below. The
Exchange has prepared summaries, set
forth in sections A, B, and C below, of
the most significant parts of such
statements.
A. Self-Regulatory Organization’s
Statement of the Purpose of, and the
Statutory Basis for, the Proposed Rule
Change
1. Purpose
The Exchange proposes to delete Rule
428(a), which addresses telephone
solicitation, and amend Rule 429, which
addresses telemarketing, to adopt new
rule text that is substantially similar to
FINRA Rule 3230.4
Proposed Rule Change
The Exchange proposes to delete Rule
428(a), amend Rule 429, and adopt new
rule text to Rule 429 to conform to the
changes adopted by FINRA for
telemarketing. FINRA adopted NASD
Rule 2212 as FINRA Rule 3230, taking
into account FINRA Incorporated New
York Stock Exchange LLC (‘‘NYSE’’)
Rule 440A and NYSE Interpretation
440A/01. FINRA Rule 3230 adds
provisions that are substantially similar
to Federal Trade Commission (‘‘FTC’’)
rules that prohibit deceptive and other
abusive telemarketing acts or practices.
NASD Rule 2212 and Rules 428 and
429 are similar rules that require
members, among other things, to
maintain do-not-call lists, limit the
hours of telephone solicitations and
prohibit members from using deceptive
and abusive acts and practices in
connection with telemarketing. The
Commission directed FINRA and the
Exchange to enact these telemarketing
rules in accordance with the
Telemarketing Consumer Fraud and
Abuse Prevention Act of 1994
(‘‘Prevention Act’’).5 The Prevention Act
requires the Commission to promulgate,
or direct any national securities
exchange or registered securities
association to promulgate, rules
substantially similar to the FTC rules to
prohibit deceptive and other abusive
telemarketing acts or practices.6
In 2003, the FTC and the Federal
Communications Commission (‘‘FCC’’)
4 See Securities Exchange Act Release No. 66279
(January 30, 2012), 77 FR 5611 (February 3, 2012)
(SR–FINRA–2011–059). FINRA’s rule change will
become effective on July 9, 2012. See FINRA
Regulatory Notice 12–17.
5 15 U.S.C. 6101–6108.
6 15 U.S.C. 6102.
E:\FR\FM\16JYN1.SGM
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Agencies
[Federal Register Volume 77, Number 136 (Monday, July 16, 2012)]
[Notices]
[Pages 41814-41824]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2012-17228]
-----------------------------------------------------------------------
NUCLEAR REGULATORY COMMISSION
[Docket No. 50-416; NRC-2012-0105]
Entergy Operations, Inc.; Grand Gulf Nuclear Station, Unit 1
AGENCY: Nuclear Regulatory Commission.
ACTION: Final environmental assessment and finding of no significant
impact; issuance.
-----------------------------------------------------------------------
SUMMARY: The U.S. Nuclear Regulatory Commission (NRC or the Commission)
is considering issuance of an amendment to Facility Operating License
No. NPF-29, issued to Entergy Operations, Inc. (Entergy, the licensee),
for operation of the Grand Gulf Nuclear Station, Unit 1 (GGNS Unit 1),
located in Claiborne County, Mississippi, in accordance with NRC's
regulations. Therefore, the NRC has prepared this final environmental
assessment (EA) and finding of no significant impact (FONSI) for the
proposed action.
ADDRESSES: Please refer to Docket ID NRC-2012-0105 when contacting the
NRC about the availability of information regarding this document. You
may access information related to this document, which the NRC
possesses and are publicly available, using any of the following
methods:
Federal Rulemaking Web site: Go to https://www.regulations.gov and search for Docket ID NRC-2012-0105. Address
questions about NRC dockets to Carol Gallagher; telephone: 301-492-
3668; email: Carol.Gallagher@nrc.gov.
NRC's Agencywide Documents Access and Management System (ADAMS):
You may access publicly available documents online in the NRC Library
at https://www.nrc.gov/reading-rm/adams.html. To begin the search,
select ``ADAMS Public Documents'' and then select ``Begin Web-based
ADAMS Search.'' For problems with ADAMS, please contact the NRC's
Public Document Room (PDR) reference staff at 1-800-397-4209, 301-415-
4737, or by email to pdr.resource@nrc.gov. The ADAMS accession number
for each document referenced in this notice (if that document is
available in ADAMS) is provided the first time that a document is
referenced. Entergy Operations, Inc. (Entergy, the licensee),
application for amendment is dated September 8, 2010, and supplemented
by letters dated November 18, 2010, November 23, 2010, February 23,
2011 (four letters), March 9, 2011 (two letters), March 22, 2011, March
30, 2011, March 31, 2011, April 14, 2011, April 21, 2011, May 3, 2011,
May 5, 2011, May 11, 2011, June 8, 2011, June 15, 2011, June 21, 2011,
June 23, 2011, July 6, 2011, July 28, 2011, August 25, 2011, August 29,
2011, August 30, 2011, September 2, 2011, September 9, 2011, September
12, 2011, September 15, 2011, September 26, 2011, October 10, 2011 (two
letters), October 24, 2011, November 14, 2011, November 25, 2011,
November 28, 2011, December 19, 2011, February 6, 2012, February 15,
2012, February 20, 2012, March 13, 2012, March 21, 2012, April 5, and
April 18, 2012 (two letters), April 26, 2012, May 9, 2012, and June 12,
2012. Portions of the letters dated September 8 and November 23, 2010,
and February 23, April 21, May 11, July 6, July 28, September 2,
October 10, November 14, November 25, and November 28, 2011, and
February 6, February 15, February 20, March 13, March 21, April 5,
April 18, 2012 (two letters), April 26, 2012, and May 9, 2012, contain
sensitive unclassified non-safeguards information (proprietary) and,
accordingly, have been withheld from public disclosure. The licensee's
letters are publicly available in ADAMS at the accession numbers listed
in the table below:
[[Page 41815]]
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Document date Accession No. Document date Accession No. Document date Accession No.
--------------------------------------------------------------------------------------------------------------------------------------------------------
9/8/2010........................... ML120660409.............. 6/8/2011 ML111590836............. 11/14/2011 ML113190403
11/18/2010......................... ML103260003.............. 6/15/2011 ML111670059............. 11/25/2011 ML113290137
11/23/2010......................... ML103330093.............. 6/21/2011 ML111730235............. 11/28/2011 ML113320403
2/23/2011.......................... ML110540534.............. 6/23/2011 ML111750244............. 12/19/2011 ML113530656
2/23/2011.......................... ML110540540.............. 7/6/2011 ML111880138............. 2/6/2012 ML12039A071
2/23/2011.......................... ML110540545.............. 7/28/2011 ML112101485............. 2/15/2012 ML120470138
2/23/2011.......................... ML110550318.............. 8/25/2011 ML112370770............. 2/20/2012 ML12054A038
3/9/2011........................... ML110680507.............. 8/29/2011 ML112410566............. 3/13/2012 ML120740083
3/9/2011........................... ML110730025.............. 8/30/2011 ML112420169............. 3/21/2012 ML12082A025
3/22/2011.......................... ML110820262.............. 9/2/2011 ML112490050............. 4/5/2012 ML12097A055
3/30/2011.......................... ML110900275.............. 9/9/2011 ML112521284............. 4/18/2012 ML12109A308
3/31/2011.......................... ML110900586.............. 9/12/2011 ML112550495............. 4/18/2012 ML12109A290
4/14/2011.......................... ML111050134.............. 9/15/2011 ML112580223............. 4/26/2012 ML12118A145
4/21/2011.......................... ML11112A098.............. 9/26/2011 ML112690143............. 5/9/2012 ML12131A535
5/3/2011........................... ML111240288.............. 10/10/2011 ML112840155............. 6/12/2012 ML12165A250
5/5/2011........................... ML111250552.............. 10/10/2011 ML112840171............. ........................
5/11/2011.......................... ML111320263.............. 10/24/2011 ML112980113............. ........................
--------------------------------------------------------------------------------------------------------------------------------------------------------
NRC's PDR: You may examine and purchase copies of public
documents at the NRC's PDR, Room O1-F21, One White Flint North, 11555
Rockville Pike, Rockville, Maryland 20852.
FOR FURTHER INFORMATION CONTACT: Alan B. Wang, Project Manager, Plant
Licensing Branch IV, Division of Operating Reactor Licensing, Office of
Nuclear Reactor Regulation, U.S. Nuclear Regulatory Commission,
Washington, DC 20555-0001; telephone: 301-415-1445; email:
AlanWang@nrc.gov.
SUPPLEMENTARY INFORMATION:
I. Background
The NRC published a notice in the Federal Register requesting
public review and comment on a draft EA and FONSI for the proposed
action on May 11, 2012 (77 FR 27804), and established June 11, 2012, as
the deadline for submitting public comments. The NRC has received no
comments regarding the draft EA.
II. Environmental Assessment
Plant Site and Environs
The GGNS Unit 1 site is located in Claiborne County, Mississippi,
on the east bank of the Mississippi River at River Mile (RM) 406,
approximately 25 miles south of Vicksburg, Mississippi, and 37 miles
north-northeast of Natchez, Mississippi. The GGNS Unit 1 site consists
of approximately 2,100 acres, comprised primarily of woodlands and
former farms as well as two lakes, Hamilton Lake and Gin Lake. The land
in the vicinity of GGNS is mostly rural. GGNS Unit 1 is a General
Electric Mark 3 boiling-water reactor.
Identification of the Proposed Action
By application dated September 8, 2010, as supplemented, the
licensee requested an amendment for an extended power uprate (EPU) for
GGNS Unit 1 to increase the licensed thermal power level from 3,898
megawatts thermal (MWt) to 4,408 MWt, which represents an increase of
approximately 13 percent above the current licensed thermal power and
approximately 15 percent over the original licensed thermal power level
of 3833 MWt. This change in core thermal power level requires the NRC
to amend the facility's operating license. The operational goal of the
proposed EPU is a corresponding increase in net electrical output of
178 megawatts electric (MWe). The proposed action is considered an EPU
by the NRC because it exceeds the typical 7 percent power increase that
can be accommodated with only minor plant changes. EPUs typically
involve extensive modifications to the nuclear steam supply system.
The licensee plans to make several extensive physical modifications
to systems necessary to generate and/or accommodate the increased
feedwater and steam flow rates to achieve EPU power levels during a
refueling outage currently scheduled for 2012. In addition, there will
be land disturbance involving installation of a new radial well system.
The actual power uprate, if approved by the NRC, would occur following
the refueling outage in 2012.
The Need for the Proposed Action
The proposed action provides GGNS Unit 1 with the flexibility to
increase its potential electrical output and to supply additional
electrical generation to the State of Mississippi and the surrounding
region.
Environmental Impacts of the Proposed Action
As part of the licensing process for GGNS Unit 1, the NRC published
a Final Environmental Statement (FES) in 1981, Final Environmental
Statement for the Operation of the Grand Gulf Nuclear Station Units 1
and 2 (NUREG-0777). The FES provides an evaluation of the environmental
impacts associated with the construction and operation of GGNS Units 1
and 2 (Unit 2 has since been cancelled) over their licensed lifetimes.
The NRC staff used information from the licensee's license amendment
request and the FES to perform its EA for the proposed EPU.
There will be extensive changes made to the steam supply system of
GGNS Unit 1 related to the EPU action, but no new construction is
planned outside of existing facilities. No extensive changes are
anticipated to existing buildings or plant systems that directly or
indirectly interface with the environment. All necessary modifications
would be performed in existing buildings at GGNS Unit 1 with the
exception of the installation of a new radial well and additional
cooling units being added to the auxiliary cooling tower. Modifications
to the steam supply system of GGNS Unit 1 include the following:
replacing the reactor feed pump turbine rotors; replacing the main
generator current transformers, replacing the high pressure turbine;
replacing the moisture separator reheater shell and internals;
replacing the steam dryer; and other modifications to upgrade the plant
service water heat removal system.
The sections below describe the non-radiological and radiological
impacts to the environment that may result from the proposed EPU.
Non-Radiological Impacts
Land Use and Aesthetic Impacts
Potential land use and aesthetic impacts from the proposed EPU
include impacts from plant modifications at the GGNS site. The licensee
states that any land disturbance activities, including
[[Page 41816]]
those associated with EPU, are reviewed in accordance with Entergy
procedures to ensure that necessary environmental protection measures
are implemented during the project. Entergy states that these measures
would include provisions to protect such things as threatened and
endangered species, cultural resources, wetland areas, water quality,
etc.
The licensee's analysis concluded that additional cooling tower
make-up water is projected to be needed (~3,200 gallons per minute
(gpm)) due to the increase in heat load generated as a result of the
EPU, which will also results in an increase in water loss through
evaporation, blowdown, and drift. A new radial well has been installed
to ensure sufficient cooling water is available to support the higher
EPU power level because GGNS's existing radial wells have degraded over
time and thus cannot perform at their design capacity. Activities to
support the well construction include clearing and grubbing of trees,
construction of a working pad using engineered fill, and excavation of
trenches for supply piping to the plant service water header, discharge
piping into the river, and electrical equipment feeders. The proposed
working pad is designed to contain all the equipment needed for
construction of the well and to provide an area for material laydown
and parking. Activities conducted in wetland areas would be managed
under a Section 404 permit issued by the United States Army Corps of
Engineers (USACE). The remaining non-wetland areas would be managed
under Mississippi Department of Environmental Quality (MDEQ) stormwater
permitting program (Permit Number MSR15) and associated best management
practices.
Improvements are also being made to the Heavy Haul Road, which
connects the site to the barge slip area, to support activities
associated with the installation of the new radial well and potential
delivery of heavy equipment as discussed below. These improvements
consist of refurbishing the existing road and road base in low areas or
areas that have become washed out over the years. These refurbishment
activities would occur within the plant site boundary with appropriate
best management practices applied and in accordance with GGNS' National
Pollutant Discharge Elimination System (NPDES) Permit MSR000883 and
associated Stormwater Pollution Prevention Plan to control silt and
erosion.
Entergy used the Port of Claiborne for delivery of new transformers
and other heavy equipment associated with the proposed EPU. As such
Entergy did not need to conduct any dredging activities in the existing
barge slip area to accommodate delivery of such equipment.
While some plant components would be modified, most changes related
to the proposed EPU would occur within existing structures, buildings,
and fenced equipment yards housing major components within the
developed part of the site. Existing parking lots, road access,
equipment lay-down areas, offices, workshops, warehouses, and restrooms
would be used during plant modifications. Therefore, land use
conditions would not change at the GGNS site. Also, there would be no
land use changes along transmission line corridors, and no new
transmission lines would be required.
Since land use conditions would not change at the GGNS Unit 1 site,
and because any land disturbance would occur within previously
disturbed areas, and those activities will be conducted in accordance
with State and Federal permits to ensure the potential impacts are not
significant, there would be little or no impact to aesthetic resources
in the vicinity of GGNS Unit 1. Therefore, there would be no
significant impact from EPU-related plant modifications on land use and
aesthetic resources in the vicinity of the GGNS Unit 1 site.
Air Quality Impacts
Major air pollution emission sources at the GGNS site are regulated
by the MDEQ in accordance with GGNS Air Permit 0420-00023.
Nonradioactive emission sources at GGNS Unit 1 result primarily from
periodic testing of diesel generators and fire water pump diesel
engines, and operation of the cooling towers. There will be no changes
to the emissions from these sources as a result of the EPU.
Some minor and short duration air quality impacts would occur
during implementation of the EPU at the GGNS site. The main source of
air emissions would come from the vehicles driven by outage workers
needed to implement the EPU. However, this source will be short term
and temporary. The majority of the EPU activities would be performed
inside existing buildings and would not cause additional atmospheric
emissions. Therefore, there would be no significant impact on air
quality during and following implementation of the proposed EPU.
The licensee also evaluated the potential for an increase in
particulate emissions that could occur as a result of the modification
to the auxiliary cooling tower and the addition of two 60-gallon lube
oil tanks associated with the new radial well pumps. These sources will
result in some minor emissions of volatile organic compounds (VOC). By
letter dated September 9, 2011 (ADAMS Accession No. ML112521284), the
licensee informed the NRC that based on the determination that the
modification to increase circulating water flow is not needed to
support EPU conditions, the particulate emissions will not change
significantly. In addition, the emission impact due to the lube oil
tanks associated with the new radial wells is minor. Therefore, no
change is required to the GGNS Air Permit 0420-00023 to the MDEQ prior
to these activities occurring.
Upon completion of the proposed EPU, non-radioactive air pollutant
emissions would increase slightly due to the modification of the
auxiliary cooling tower and the addition of two 60-gallon lube oil
tanks for the new radial well pumps but will be regulated in accordance
with the GGNS Air Permit with MDEQ and there would be no significant
impact on air quality in the region during and following implementation
of the proposed EPU.
Water Use Impacts
Surface Water
The western boundary of the GGNS site is defined by the Mississippi
River's eastern bank. At the site, the Mississippi River is about 0.5
miles wide at low flow and about 1.4 miles during a typical annual high
flow period. The massive nature of the Mississippi River makes the
liquid effluent discharges from the GGNS facility undetectable within
the overall flow regime, and any changes in the quality are small and
localized compared to the overall volume of water in the river.
Hamilton and Gin are lakes on the GGNS site. These lakes are what
remain of the former river channel after the Mississippi River moved to
the west. Hamilton and Gin lakes are relatively small (Hamilton Lake is
approximately 64 acres, and Gin Lake is approximately 55 acres) and
shallow with an average depth of 8 to 10 feet. There is no effluent
discharged or water drawn from these lakes for plant operations.
Limitations and monitoring requirements for plant effluent
discharges are specified in the NPDES Permit. Discharges directly to
the Mississippi River are required to be monitored continuously.
Modifications of the nonradiological drain systems or other systems
conveying wastewaters are not required for the EPU, and biocide/
chemical discharges would be within existing permit limits. Although
[[Page 41817]]
it is estimated that blowdown (the release of liquid effluent to clean
the water in the system) would increase slightly (~825 gpm) based on
evaporation, the EPU is not introducing any new contaminants or
pollutants and is not increasing the amount of those potential
contaminants presently allowed for release by GGNS Unit 1.
Chemical and biocide wastes are produced from processes used to
control the pH in the coolant, to control scale, to control corrosion,
and to clean and defoul the condenser. These waste liquids are
typically combined with cooling water discharges in accordance with the
site's NPDES Permit MS0029521. Sanitary wastewater from all plant
locations are regulated by GGNS NPDES Permit MS0029521, and flow to an
onsite sewage treatment plant prior to discharge into the Mississippi
River. Solids associated with treatment of the sanitary wastewater are
placed in drying beds and then managed appropriately for eventual
offsite disposal.
Surface water and wastewater discharges are regulated by the MDEQ
via the NPDES permit. The permits are reviewed by the MDEQ on a 5-year
basis. The current GGNS NPDES permit, which has been administratively
continued by the MDEQ based on Entergy's timely submittal of the permit
renewal application, authorizes discharges from 11 outfalls into the
Mississippi River. None of the NPDES permit limits would require a
modification to support or implement the EPU.
Total surface water withdrawals in Claiborne County are
predominantly for agricultural use (livestock and irrigation), with no
surface water usage reported for public supply, domestic self-supplied
systems, mining, hydroelectric power, thermoelectric power, or
industrial or commercial uses.
The nearest downstream user of Mississippi River water is the
Southeast Wood Fiber company located at the Claiborne County Port
facility, 0.8 miles downstream of the GGNS site. The maximum intake
requirement for this facility is less than 0.9 million gallons per day
(mgd). There are only three public water supply systems in the State of
Mississippi that use surface water as a source, and none of these are
located within 50 miles of the GGNS site.
Based on the above, the NRC staff concludes that the proposed EPU
will not have a significant impact on surface water in the area of
GGNS, and operation under EPU conditions would not cause a water use
conflict with other surface water users in the GGNS area.
Groundwater
There are 16 groundwater wells currently used for withdrawal
purposes at the GGNS site. Groundwater is used for domestic water,
once-through cooling for plant air conditioners, and for regenerating
the water softeners at the Energy Services Center.
There are currently four radial wells which supply water to the
plant service water system. Since additional cooling tower make-up
water is projected to be needed (~3,200 gpm) due to the increase in
heat load generated as a result of the EPU, and an increase in water
loss through evaporation, blowdown, and drift, a new radial well was
installed to provide additional water needed during EPU operating
conditions. The new radial well was completed and made operational
during the spring 2012 refueling outage. As previously discussed, the
existing radial wells have degraded over time and thus cannot perform
at their full design capacity. Although water being utilized for
cooling tower make-up is projected to increase from current levels, the
estimated EPU cooling tower makeup flow value of 27,860 gpm (62 cubic
feet per second (cfs)) is less than the estimated 42,636 gpm (95 cfs)
value identified in the GGNS FES; therefore, groundwater consumption
remains lower than the value analyzed in the GGNS FES.
Public water supply wells in Claiborne County (excluding GGNS) are
supplied by the Catahoula Formation with well depths ranging from 166
to 960 feet. Aside from GGNS Unit 1, the primary use of groundwater in
Claiborne County is for public supply purposes with a small percentage
used for domestic water, irrigation, and livestock. Within a two-mile
radius of the plant site, essentially all groundwater is used for
domestic purposes.
GGNS groundwater is supplied from the Mississippi River Alluvium
(radial wells) and the Upland Complex (potable wells) aquifers.
Residents within the vicinity of GGNS are served by CS&I Water
Association which withdraws water from the Miocene aquifer. Since the
GGNS withdraws groundwater from the Mississippi River Alluvium and
Upland Complex aquifers, the Miocene aquifers, including the Catahoula
Formation, are unaffected.
The impact to offsite groundwater users from the withdrawal of
water by GGNS Unit 1 is limited by the recharge boundary created by the
river, and thus, is not expected to extend to the west beyond the
river. Based on estimates of the radius of anticipated drawdown of the
GGNS radial wells, drawdown at the GGNS property boundaries would have
minimal impact on potential offsite use in the Mississippi River
Alluvium aquifer. This is a conservative estimate of aquifer capacity
impact, as aquifer recharge from sources other than the river (flooding
and rainfall events) was not considered. GGNS's potable water wells are
the closest wells withdrawing groundwater in the vicinity (although not
from the Mississippi River Alluvium) and have operated to supply
adequate water supply to the GGNS site without noticeable impact from
the operation of the radial wells. There are no known withdrawals from
the Mississippi River Alluvium aquifer other than GGNS Unit 1 between
the Big Black River to the north, and Bayou Pierre River to the south.
Water rights and allocations of groundwater are regulated by MDEQ.
Therefore, all existing GGNS Unit 1 groundwater withdrawals, including
those from the radial wells, are regulated by a groundwater allocation
permitting program. These permits were granted considering their
identified potential impact on other uses in the area and considering
those withdrawals in the recharge area of the Mississippi River
Alluvium aquifer. Based on the above, there are no groundwater use
conflicts between GGNS and other local groundwater users.
Approximately 40 percent of the GGNS site is bottomland, including
forested, shrub, and emergent marsh wetlands. As stated above, the
groundwater in the alluvium in the floodplain is in close hydraulic
communication with the river. The groundwater contour figures reveal
that the impact of the cone of depression surrounding the radial wells
is dependent upon river stage. This impact is limited also by recharge
to the alluvium derived from infiltration of precipitation, westward
flow of groundwater across the terrace alluvium contact at the bluffs,
and the flooding of the Mississippi River during high river stages.
Thus, based on the localized influence of the drawdown zone surrounding
the wells, the groundwater's hydraulic connection with the river,
recharge from seasonal flooding and additional recharge from the Upland
Terrace aquifer east of the bluffs, the impact of radial well
groundwater withdrawal in the floodplain is of limited extent. Even
though there is potentially greater impact to groundwater levels at the
lowest river stages than at higher river stages, the low river stages
are generally temporary. Therefore, the impact of the
[[Page 41818]]
radial wells on nearby wetlands is minimal.
Plant operation at the proposed EPU power level is not expected to
cause impacts significantly greater than current operations. As
previously discussed, groundwater withdrawals would continue to be
lower than the values analyzed in the GGNS FES as a result of EPU and
continued operational activities. The installation of an additional
radial well is expected to reduce the per-well withdrawal rates without
an increase in overall groundwater impacts. No major construction is
planned, so additional groundwater withdrawals will not be required.
Based on the above, the NRC staff concludes that the EPU will not have
a significant impact on groundwater in the underlying aquifers, and
operation under EPU conditions would not cause a water use conflict
with other groundwater users in the GGNS area.
Aquatic Resources Impacts
The potential impacts to aquatic biota from the proposed action
could include thermal and chemical discharge effects. GGNS does not
have an intake structure that withdraws surface water directly from a
body of water, therefore, no entrainment or impingement of organisms
would occur.
GGNS uses groundwater from a series of radial wells to supply its
plant service water system, as discussed in the Water Use Impacts
section. The circulating water system is a closed system utilizing a
natural draft cooling tower and a mechanical draft auxiliary cooling
tower. The natural draft cooling tower is designed to operate alone or
in conjunction with the auxiliary cooling tower to dissipate all excess
heat removed from the main condensers. Additional cooling units will be
added to the auxiliary cooling tower, as discussed in the Land Use and
Aesthetics section. Makeup water, to compensate for drift, blowdown,
and evaporation losses from the cooling towers, is supplied from the
plant service water system by means of the radial wells. A new radial
well will be installed to handle the increase in heat load associated
with the EPU, as discussed in the Water Use section.
The circulating water system is designed to supply the main
condenser with cooling water at temperatures ranging from 2.8 degrees
Celsius ([deg]C) (37 degrees Fahrenheit ([deg]F)) to 36.1 [deg]C (97
[deg]F) when the mechanical draft auxiliary cooling tower is not in
service, and less than 32.2 [deg]C (90 [deg]F) with the natural draft
and auxiliary cooling towers both in service. The licensee states that
the auxiliary cooling towers remain in service year round, with the
exception of a short period (i.e., hours) when they are taken out of
service for cleaning. Therefore, water being supplied to the condenser
is anticipated to be less than 32.2 [deg]C (90 [deg]F) year round.
Thermal effluents associated with cooling tower blowdown are
combined with other plant effluents and discharged into the Mississippi
River. The conditions associated with thermal discharges as outlined in
GGNS's MDEQ NPDES permit state that the receiving water shall not
exceed a maximum water temperature change of 2.8 [deg]C (5.0 [deg]F)
and that the maximum water temperature shall not exceed 32.2 [deg]C (90
[deg]F), except when ambient temperatures approach or exceed that
number.
GGNS is required by the MDEQ NPDES Permit to conduct thermal
monitoring during the winter and summer months preceding the submittal
year of the permit renewal application and include those results in the
submittal. Based on previous years of operational experience, GGNS has
not violated the thermal conditions outlined in the permit.
Based on the above, the NRC staff concludes that although the heat
load would increase as a result of the proposed EPU, the thermal
discharge associated with GGNS operations would continue to remain at
or slightly below current operating temperatures due to the additional
cooling units being installed in the auxiliary cooling tower. As stated
by the licensee, the auxiliary cooling towers operate in conjunction
with the natural draft cooling tower year round. Consequently, the
temperature of the cooling water being supplied to the condenser is not
increasing, which ensures that the thermal conditions outlined in the
GGNS MDEQ NPDES permit continue to be met. Therefore, the NRC staff
concludes there would be no significant adverse impacts to aquatic
biota from thermal discharges.
The plant service water system for GGNS is treated with sodium
hypochlorite and biocides to control the pH in the coolant, to control
scale, to control corrosion, and to clean and defoul the condenser. The
liquid wastes produced from this process are combined with cooling
water discharges in accordance with the site's MDEQ NPDES permit and
discharged into the Mississippi River. Due to the additional cooling
units being added to the auxiliary cooling tower, additional sodium
hypochlorite injection will be needed to control biological fouling
effectively. However, the liquid waste stream is dechlorinated with
sodium bisulfite prior to being discharged to the Mississippi River.
Consequently, effluent concentrations would be slightly higher but
continue to be below the NPDES permit limits specified by MDEQ. The
licensee has noted that it will maintain compliance with the MDEQ NPDES
permit held currently by the plant as a function of the proposed EPU.
Therefore, the NRC staff concludes there would be no significant
adverse impacts to aquatic biota from chemical discharges.
As the delivery of transformers and other heavy equipment
associated with the proposed EPU were made at the Claiborne County Port
facility, no dredging activities were needed at the existing barge slip
area.
Terrestrial Resources Impacts
The GGNS site is bisected by a prominent bluff line that runs
parallel to the Mississippi River. Areas below the bluff line are
seasonally flooded, except for two oxbow lakes which are permanently
inundated and are considered wetland areas. Above the bluff line, the
two prominent habitat types are upland field and upland forest with the
vast majority upland forest. One small area of wetland has been defined
on the north side of the plant as permanently flooded. Most of the
previously developed areas are in upland habitat; however,
approximately 400 acres of upland forest remains on-site.
The impacts that could potentially affect terrestrial resources
include loss of habitat, construction and refurbishment-related noise
and lighting, and sediment transport or erosion. Most of the activities
associated with the EPU would occur on the developed portion of the
site, would not directly affect any natural terrestrial habitats, and
would not result in loss of habitat. As discussed in Land Use and
Aesthetic Impacts section above, activities associated with
installation of the new radial well would be managed in accordance with
the Section 404 Permit and MDEQ's stormwater permitting program (Permit
Number MSR15), as appropriate. Although there is no habitat present on
the Heavy Haul Road, refurbishment activities associated with the road
would be managed in accordance with the terms and conditions in State
and Federal permits. Noise and lighting would not impact terrestrial
species beyond what would be experienced during normal operations
because refurbishment and construction activities would take place
during outage periods, which are already periods of heightened
activity. Based on the above, the NRC staff concludes that the proposed
EPU would
[[Page 41819]]
have no significant effect on terrestrial resources.
Threatened and Endangered Species Impacts
The licensee corresponded with the U.S. Fish and Wildlife Service
(USFWS) during the preparation of the Environmental Report for the EPU
to ensure that the proposed EPU would not adversely affect any species
protected under the Endangered Species Act. The following Table 1
identifies federally listed and candidate species that are in the
vicinity of GGNS Unit 1.
Table 1--Federally Listed Species in the Vicinity of GGNS Unit 1
------------------------------------------------------------------------
Scientific Name Status \(a)\
------------------------------------------------------------------------
Birds:
Picoides borealis.......... red-cockaded E
woodpecker.
Sterna antillarum.......... least tern (interior E
pop.).
Clams:
Potamilus capax............ fat pocketbook........ E
Quadrula cylindrica rabbitsfoot........... C
cylindrica.
Fish:
Etheostoma rubrum.......... bayou darter.......... T
Acipenser oxyrinchus desoto gulf sturgeon......... T
Scaphirhynchus albus....... pallid sturgeon....... E
Mammals:
Ursus americanus luteolus.. Louisiana black bear.. T
------------------------------------------------------------------------
\(a)\ C = candidate; E = endangered; T = threatened
Data source: [FWS] U.S. Fish and Wildlife Service. 2011. Find Endangered
Species Database. Available at https://www.fws.gov/endangered/
(accessed 13 December 2011).
As discussed in the Land Use and Aesthetic Impacts section, the
only EPU activities involving land disturbance are the installation of
a new radial well and Heavy Haul Road improvements. These activities
would be handled in accordance with the terms and conditions in State
and Federal permits.
The licensee states that procedures are in place at GGNS Unit 1 to
ensure that threatened and endangered species would be adequately
protected, if present, during the outage and during plant operations.
Any traffic and worker activity on the plant site during its 2012
refueling outage would be on the developed portion of the site and
would not affect any federally listed species.
As stated above, the licensee consulted with the USFWS regarding
threatened and endangered species in the vicinity of GGNS Unit 1. No
issues were identified that would impact any of the federally listed
species as a result of the proposed EPU. Therefore, the NRC staff
concludes that the proposed EPU would have no significant impacts on
any Federally listed threatened or endangered species for the proposed
action.
Historic and Archaeological Resources Impacts
The licensee states that at the recommendation of the Mississippi
Department of Archives and History (MDAH), a Phase I archaeological
survey was conducted in 2007 on two onsite study areas. Eleven
archaeological sites and eight isolated finds/small artifact scatters
were identified during this survey. One historic site within the study
area and located south of the plant in a wooded area, was identified as
having the potential to be eligible for the National Register of
Historic Places (NRHP). The remaining sites were determined to be
ineligible for listing on the NRHP. The MDAH required no further
actions from GGNS provided that no construction activities occurred in
this specific area.
As discussed in Land Use and Aesthetic Impacts section, the only
EPU activities involving land disturbance is the installation of a new
radial well and Heavy Haul Road improvements. Entergy has a procedure
in place, applicable to all of its power plants, for management of
cultural resources ahead of any future ground-disturbing activities.
This procedure, which requires reviews, investigations, and
consultations, as needed, ensures that existing or potentially existing
cultural resources are adequately protected and assists Entergy in
meeting State and Federal expectations.
As previously discussed, EPU-related plant modifications would take
place within existing buildings and facilities at GGNS, except for the
addition of the cooling units being added to the auxiliary cooling
tower which will be installed on an existing foundation. Since ground
disturbance or construction-related activities would not occur in any
areas with the potential to be eligible for the NRHP, and that Entergy
has procedures in place for management of cultural resources, the NRC
staff concludes that there would be no significant impact from the
proposed EPU on historic and archaeological resources in the vicinity
of GGNS Unit 1.
Socioeconomic Impacts
Potential socioeconomic impacts from the proposed EPU include
temporary increases in the size of the workforce at GGNS, and the
associated increased demand for goods, public services, and housing in
the region. The proposed EPU also could generate increased tax revenues
for the State and surrounding counties.
Currently, approximately 690 full-time employees work at GGNS.
During regularly scheduled refueling outages, the workforce is
typically increased by additional 700-900 persons. Refueling outages
usually last 25-30 days every 18 months, although GGNS plans to change
to a 24-month refueling cycle in the future. Entergy estimates that
operating at the proposed EPU power level would not affect the size of
the regular workforce. The 2012 outage workforce will be larger than
previous outages due to the EPU modifications but would be of short
duration. Once EPU-related plant modifications have been completed, the
size of the refueling outage workforce at GGNS would return to normal
levels and would remain similar to pre-EPU levels, with no significant
increases during future refueling outages. Entergy expects most of the
temporary workers expected for the EPU related work will temporarily
reside in Claiborne County. This will result in short-term increases in
the local population along with increased demands for public services
and housing. Because plant modification
[[Page 41820]]
work would be short term and temporary, most workers are expected to
stay in available rental homes, apartments, mobile homes, and camper-
trailers. The 2010 American Community Survey 1-year estimate for vacant
housing units reported 783 vacant housing units in Claiborne County;
that could potentially ease the demand for local rental housing.
Therefore, the NRC expects that the temporary increase in plant
employment for a short duration would have little or no noticeable
effect on the availability of housing in the region.
The additional number of outage workers and material and equipment
deliveries needed to support EPU-related plant modifications would
cause short-term level of service impacts (restricted traffic flow and
higher incident rates) on secondary roads in the immediate vicinity of
GGNS. As EPU-related plant modifications would occur during a normal
refueling outage, there could be noticeable short-term (during certain
hours of the day), level-of-service traffic impacts beyond what is
experienced during normal outages.
Nuclear power plants in Mississippi currently pay the Mississippi
Department of Revenue a sum based on the assessed value of the plant.
Based upon this assessment, nuclear power plants are then taxed 2
percent of its assessed value, or a maximum of $20,000,000. GGNS
currently pays $20,000,000 annually to the Mississippi Department of
Revenue. Tax revenue is distributed in proportion to the amount of
electric energy consumed by the retail customers in each county, with
no county receiving an excess of 20 percent of the funds. Ten percent
of the remainder of the tax payment is then transferred from the
Mississippi Department of Revenue to the General Fund of the State. The
increased property value of GGNS as a result of the EPU and increased
power generation could affect future tax payments by GGNS.
Due to the short duration of EPU-related plant modification
activities, there would be little or no noticeable effect on tax
revenues generated by temporary workers residing in Claiborne County.
In addition, GGNS is currently paying the maximum tax on the assessed
value of the plant. Therefore, the NRC expects no significant
socioeconomic impacts from EPU-related plant modifications and
operations under EPU conditions in the vicinity of GGNS.
Environmental Justice Impacts
The environmental justice impact analysis evaluates the potential
for disproportionately high and adverse human health and environmental
effects on minority and low-income populations that could result from
activities associated with the proposed EPU at GGNS. Such effects may
include human health, biological, cultural, economic, or social
impacts. Minority and low-income populations are subsets of the general
public residing around GGNS, and all are exposed to the same health and
environmental effects generated from activities at GGNS.
NRC considered the demographic composition of the area within a 50-
mile (mi) (80.5-kilometer (km)) radius of GGNS to determine whether
minorities may be affected by the proposed action. The NRC examined the
distribution of minority populations within 50 mi (80.5 km) of GGNS
using the U.S. Census Bureau (USCB) data for 2010.
According to the 2010 Census data using the University of
Missouri's Circular Area Profiling System, an estimated 316,387 people
live within a 50-mi (80.5-km) radius of GGNS. Minority populations
within 50 mi (80.5 km) comprise 53.2 percent (168,166 persons). The
largest minority group was Black or African-American (approximately
157,707 persons or 49.8 percent), followed by Hispanic or Latino (of
any race) (approximately 6,115 persons or 1.9 percent). Minority
populations within Claiborne County comprise 85.2 percent of the total
population with the largest minority group being Black or African-
American at 84.6 percent.
NRC examined low-income populations within Claiborne County using
the 2006-2010 American Community Survey 5-Year Estimates. According to
census data, approximately 35 percent of the population (3,186
individuals) residing within Claiborne County was considered low-
income, defined as living below the 2010 Federal poverty threshold.
Approximately 27.6 percent of families were determined to be living
below the Federal poverty threshold in Claiborne. The 2010 Federal
poverty threshold was $22,314 for a family of four and $11,139 for an
individual. The median household income for Claiborne County was
approximately $24,150, which is 51 percent lower than the median
household income (approximately $47,031) for Mississippi.
Potential impacts to minority and low-income populations would
mostly consist of environmental and socioeconomic effects (e.g., noise,
dust, traffic, employment, and housing impacts). Radiation doses from
plant operations after the EPU are expected to continue to remain well
below regulatory limits.
Noise and dust impacts would be temporary and limited to onsite
activities. Minority and low-income populations residing along site
access roads could experience increased commuter vehicle traffic during
shift changes. Increased demand for inexpensive rental housing during
the EPU-related plant modifications could disproportionately affect
low-income populations; however, due to the short duration of the EPU-
related work and the availability of housing properties, impacts to
minority and low-income populations would be of short duration and
limited. According to the 2010 census information, there were
approximately 783 vacant housing units in Claiborne County.
Based on this information and the analysis of human health and
environmental impacts presented in this EA, the proposed EPU would not
have disproportionately high and adverse human health and environmental
effects on minority and low-income populations residing in the GGNS
vicinity.
Non-Radiological Cumulative Impacts
The NRC considered potential cumulative impacts on the environment
resulting from the incremental impact of the proposed EPU when added to
other past, present, and reasonably foreseeable future actions. For the
purposes of this analysis, past actions include the construction and
licensing of GGNS Unit 1. Present actions include operations and
maintenance activities associated with operations under the current NRC
operating license through the date of that license's expiration
(November 1, 2024). Reasonably foreseeable future actions are discussed
below.
Entergy submitted an application to the NRC for license renewal on
October 28, 2011 (ADAMS Accession No. ML113080132). The NRC is
currently in the process of reviewing this application and intends to
publish a draft supplement to NUREG-1437, ``Generic Environmental
Impact Statement for License Renewal of Nuclear Plants,'' in December
2012. If the NRC grants Entergy a new license, that license would
authorize Entergy to operate GGNS Unit 1 for an additional 20 years
(through November 1, 2044). For purposes of this analysis, the proposed
license renewal is considered a reasonably foreseeable future action.
In its Environmental Report for the proposed license renewal, Entergy
concludes that cumulative impacts during the proposed license renewal
[[Page 41821]]
term would be small to moderate for land use and ecological resources
but that these impacts would be effectively mitigated. Cumulative
impacts to air quality and socioeconomics would be beneficial and small
to moderate in scale, and the impacts to the remaining resources areas
would be small. However, the draft supplement to NUREG-1437 will
document the NRC's independent National Environmental Policy Act (NEPA)
analysis and consider potential cumulative impacts of the proposed
license renewal.
Entergy submitted a combined license (COL) application to the NRC
for an Economic Simplified Boiling Water Reactor (designated as ``Grand
Gulf, Unit 3'') on February 27, 2008 (ADAMS Accession No. ML083570119).
Entergy's COL application submission does not commit Entergy to build a
new nuclear power unit; the application also does not constitute NRC's
approval of the proposal. The NRC initiated a NEPA review as part of
the review of Entergy's COL application. However, on January 9, 2009
(ADAMS Accession No. ML090130174), Entergy informed the NRC that it was
considering alternate reactor design technologies and requested that
the NRC stop its COL application review until further notice. The NRC
suspended its review associated with the COL application (including the
NEPA review) and, to date, has not resumed that review. The NRC was in
the process of preparing an environmental impact statement (EIS) to
evaluate the environmental impacts of the proposed Grand Gulf, Unit 3.
However, because the review was suspended, the NRC did not publish the
EIS. At this time, NRC does not consider licensing of Grand Gulf, Unit
3 to be a reasonably foreseeable future action because Entergy has not
requested NRC to reinitiate its COL review to date. If in the future,
Entergy submits a revised reactor design to the NRC for Grand Gulf,
Unit 3, the NRC will evaluate the merits of that COL application and
will decide whether to approve or deny the license after considering
and evaluating the environmental and safety implications of the
proposal. The environmental impacts of constructing and operating a new
unit will depend on the unit's actual design characteristics,
construction plans, and operations procedures. These impacts, including
cumulative impacts, would be assessed by the NRC in a separate NEPA
document.
Previous to the COL application, the NRC issued an Early Site
Permit (ESP) for Grand Gulf on April 5, 2007 (ADAMS Accession No.
ML070780457). Entergy submitted its ESP application for the Grand Gulf
site to the NRC on October 16, 2003 (ADAMS Accession No. ML032960373).
The NRC published NUREG-1817, ``Environmental Impact Statement for an
Early Site Permit (ESP) at the Grand Gulf ESP Site, Final Report,'' in
April 2006 (ADAMS Accession No. ML060900037), to document its NEPA
analysis associated with the ESP application review. Chapter 7 of
NUREG-1817 addresses cumulative impacts and concludes that impacts
would range from small to moderate depending on the particular resource
area, but that in several cases (land use, water use and water quality,
terrestrial ecosystems, nonradiological health, radiological impacts of
operation of non-light-water reactor designs, and decommissioning),
information was not available to determine the level of impact. In
these cases, the NRC noted that a future COL application would be
required for the staff to determine the specific impacts based on
proposed design characteristics, construction plans, and operations
procedures. However, as discussed above, Entergy has requested that NRC
suspend its COL application review, and thus, NRC does not have the
information required to make determinations on the cumulative impacts
that would result from a new reactor.
Non-Radiological Impacts Summary
As previously discussed, the proposed EPU would not result in any
significant non-radiological impacts. Table 2 summarizes the non-
radiological environmental impacts of the proposed EPU at GGNS.
Table 2--Summary of Non-Radiological Environmental Impacts
----------------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------
Land Use....................................... The proposed EPU is not expected to cause a significant impact
on land use conditions and aesthetic resources in the vicinity
of the GGNS.
Air Quality.................................... The proposed EPU is not expected to cause a significant impact
to air quality.
Water Use...................................... The proposed EPU is not expected to cause impacts significantly
greater than current operations. No significant impact on
groundwater or surface water resources.
Aquatic Resources.............................. The proposed EPU is not expected to cause impacts significantly
greater than current operations. No significant impact to
aquatic resources due to additional chemical or thermal
discharges.
Terrestrial Resources.......................... The proposed EPU is not expected to cause impacts significantly
greater than current operations. No significant impact to
terrestrial resources.
Threatened and Endangered Species.............. The proposed EPU would have no effect on Federally threatened
and endangered species.
Historic and Archaeological Resources.......... The proposed EPU would have no significant impact to historic
and archaeological resources on site or in the vicinity of the
GGNS.
Socioeconomics................................. The proposed EPU would have no significant socioeconomic
impacts from EPU-related temporary increase in workforce.
Environmental Justice.......................... The proposed EPU would have no disproportionately high and
adverse human health and environmental effects on minority and
low-income populations in the vicinity of the GGNS site.
Cumulative Impacts............................. The proposed EPU would not cause impacts significantly greater
than current operations.
----------------------------------------------------------------------------------------------------------------
Radiological Impacts
Radioactive Gaseous and Liquid Effluents and Solid Waste
GGNS Unit 1 uses waste treatment systems to collect, process,
recycle, and dispose of gaseous, liquid, and solid wastes that contain
radioactive material in a safe and controlled manner within NRC and EPA
radiation safety standards. The licensee's evaluation of plant
operation under the proposed EPU conditions shows that no physical
changes would be needed to the radioactive gaseous, liquid, or solid
waste systems.
Radioactive Gaseous Effluents
The gaseous waste management systems include the ventilation
systems of normally and potentially radioactive components, building
ventilation systems, the off-gas system, and the mechanical vacuum pump
system. The licensee's evaluation concluded that the proposed EPU is
expected to increase the production and activity of gaseous effluents
approximately 13 percent; however, the increase would be below the
design basis values the system is
[[Page 41822]]
designed to handle. The licensee's evaluation concluded that the
proposed EPU would not change the radioactive gaseous waste system's
design function and reliability to safely control and process the
waste. The projected gaseous releases following implementation of the
EPU would remain within the values analyzed in the FES for GGNS Unit 1.
The existing equipment and plant procedures that control radioactive
releases to the environment will continue to be used to maintain
radioactive gaseous releases within the dose limits of 10 CFR 20.1302
and the as low as is reasonably achievable (ALARA) dose objectives in
Appendix I to 10 CFR part 50.
Radioactive Liquid Effluents
The liquid waste management system collects, processes, and
prepares radioactive liquid waste for disposal. Radioactive liquid
wastes include liquids from various equipment drains, floor drains,
chemical wastes, and miscellaneous plant equipment subsystems, and
alternative liquid radioactive waste processing equipment. Entergy is
installing a condensate full flow filter (CFFF)--iron control system
upstream of the condensate demineralizers to reduce the corrosion
product loading on the demineralizer resins. The addition of iron
control to the CFFF would prevent iron from being deposited on the
demineralization resin. The amount of liquid waste generated by the
condensate demineralizer system is expected to remain unchanged or even
decrease. The licensee's evaluation shows that the proposed EPU
implementation would not significantly increase the inventory of liquid
normally processed by the liquid waste management system. This is
because the system functions are not changing, and the volume inputs
remain the same. The proposed EPU would result in a 13 percent increase
in the equilibrium radioactivity in the reactor coolant which in turn
would impact the concentrations of radioactive nuclides in the liquid
waste disposal systems.
Since the composition of the radioactive material in the waste and
the volume of radioactive material processed through the system are not
expected to significantly change, the current design and operation of
the radioactive liquid waste system will accommodate the effects of the
proposed EPU. The projected liquid effluent release following EPU
implementation would remain within the values analyzed in the FES for
GGNS Unit 1. The existing equipment and plant procedures that control
radioactive releases to the environment will continue to be used to
maintain radioactive liquid releases within the dose limits of 10 CFR
20.1302 and ALARA dose standards in Appendix I to 10 CFR part 50.
Radioactive Solid Wastes
The solid radwaste system is designed to provide solidification and
packaging for radioactive wastes that are produced during shutdown,
startup, and normal operation, and to store these wastes until they are
shipped offsite for burial. Solid radwaste is processed on a batch
basis and would increase slightly, resulting in an increase in batch
processing. The licensee's evaluation concluded that the annual volume
of solid waste is expected to increase from 152.83 cubic meters (m\3\)
at current licensed thermal power to 153.65 m\3\ per year, or 0.82 m\3\
per year. Although EPU implementation increases the amount of solid
waste produced, the design capability of the solid radwaste system and
the total volume capacity for handling solid waste are unaffected, and
the system will be able to handle the additional waste without any
modifications. The equipment is designed and operated to process the
waste into a form that minimizes potential harm to the workers and the
environment. Waste processing areas are monitored for radiation, and
there are safety features to ensure worker doses are maintained within
regulatory limits. The proposed EPU would not generate a new type of
waste or create a new waste stream.
The licensee manages low level radioactive waste (LLRW)
contractually with an offsite vendor and expects to continue to ship
LLRW offsite for processing and disposal. Entergy currently transports
radioactive waste to licensed processing facilities in Tennessee,
including Duratek (owned by EnergySolutions) or Race (owned by
Studsvik), where the wastes are processed prior to being sent for
disposal at EnergySolutions in Clive, Utah.
Based on the above, the NRC staff concludes that the impact from
the proposed EPU on the management of radioactive solid waste would not
be significant.
Occupational Radiation Dose at EPU Power Levels
The licensee stated that the in-plant radiation sources are
expected to increase approximately linearly with the proposed increase
in core power level. To protect the workers, the licensee's radiation
protection program monitors radiation levels throughout the plant to
establish appropriate work controls, training, temporary shielding, and
protective equipment requirements so that worker doses will remain
within the dose limits of 10 CFR part 20 and ALARA.
The licensee states that GGNS Unit 1 has been designed using an
extremely conservative basis for water and steam radionuclide
concentrations such that changes in actual concentrations as a result
of EPU are well within the original design limits. Inside containment,
the radiation levels near the reactor vessel are assumed to increase by
13 percent. However, the reactor vessel is inaccessible during
operation, and because of the margin in the shielding around the
reactor vessel, an increase of 13 percent would not measurably increase
occupational doses during power operation. The radiation levels due to
spent fuel are anticipated to increase by 13 percent. Expected
increases in these values would occur primarily in fuel handling
operations during refueling outages. However, a review of existing
radiation zoning design concluded that no changes in the radiation zone
designations or shielding requirements would need to be made as a
result of EPU, and operation under EPU conditions would have no
significant effect on occupational and onsite radiation exposure.
Based on the above, the NRC staff concludes that the proposed EPU
is not expected to significantly affect radiation levels within the
plants and, therefore, there would not be a significant radiological
impact to the workers.
Offsite Doses at EPU Power Levels
The licensee states that normal operational gaseous activity levels
may increase slightly. The increase in activity levels is generally
proportional to the percentage increase in core thermal power, which is
approximately 13 percent. However, this slight increase does not affect
the large margin to the offsite dose limits established by 10 CFR part
20, allowing GGNS to operate well below the regulatory limits even at
the higher power level.
The sources of offsite dose to members of the public from GGNS Unit
1 are radioactive gaseous and liquid effluents and direct radiation. As
previously discussed, operation at the proposed EPU conditions will not
change the radioactive waste management systems' abilities to perform
their intended functions. Also, there would be no change to the
radiation monitoring system and procedures used to control the release
of radioactive effluents in accordance with NRC radiation protection
standards in
[[Page 41823]]
10 CFR part 20 and Appendix I to 10 CFR part 50.
Based on the above, the NRC staff concluded that the offsite
radiation dose to members of the public from the proposed EPU would
continue to be within the NRC and EPA regulatory limits.
Spent Nuclear Fuel
Spent fuel from GGNS Unit 1 is stored in the plant's spent fuel
pool and in dry casks in the independent spent fuel storage
installation. The current typical average enrichment of a batch of fuel
at GGNS is approximately 4 percent by weight uranium-235. The
additional energy requirements for the EPU are met by an increase in
fuel enrichment, an increase in the reload fuel batch size, and/or
changes in the fuel loading pattern to maintain the desired plant
operating cycle length. The equilibrium core evaluated for the EPU has
an average enrichment well below 4.5 percent uranium-235 by weight.
Entergy's EPU evaluation also considered a possible future change to a
24-month refueling cycle; the combination of the EPU and the longer
cycle length could result in an increase in fuel bundle assembly size
from 312 to about 380 assemblies. The maximum average burnup level of
any fuel rod would continue to be less than 62,000 megawatt-days per
metric tonne (MWd/MTU), and reload design goals would maintain the GGNS
Unit 1 fuel cycles within the burnup and enrichment limits bounded by
the impacts analyzed in 10 CFR part 51, Table S-3--Table of Uranium
Fuel Cycle Environmental Data, and Table S-4--Environmental Impact of
Transportation of Fuel and Waste to and from One Light-Water-Cooled
Nuclear Power Reactor, as supplemented by NUREG-1437, Volume 1,
Addendum 1, ``Generic Environmental Impact Statement for License
Renewal of Nuclear Plants, Main Report. Section 6.3--Transportation
Table 9.1, Summary of findings on NEPA issues for license renewal of
nuclear power plants.'' Therefore, the NRC staff concludes that there
would be no significant impacts resulting from spent nuclear fuel.
Postulated Design-Basis Accident Doses
Postulated design-basis accidents are evaluated by both the
licensee and the NRC to ensure that GGNS Unit 1 can withstand normal
and abnormal transients and a broad spectrum of postulated accidents
without undue hazard to the health and safety of the public.
The NRC staff is reviewing the applicant's analyses to
independently verify the applicant's calculated doses under accident
conditions. The NRC staff's evaluation results will be contained in the
safety evaluation that will be issued concurrently with the proposed
EPU amendment, if so approved by the NRC staff. However, for the
purpose of this EA, the NRC staff concludes that, based on the
information provided by the licensee, the proposed EPU would not
significantly increase the radiological consequences of postulated
accidents.
Radiological Cumulative Impacts
The radiological dose limits for protection of the public and
workers have been developed by the NRC and EPA to address the
cumulative impact of acute and long-term exposure to radiation and
radioactive material. These dose limits are codified in 10 CFR part 20
and 40 CFR part 190.
The cumulative radiation dose to the public and workers are
required to be within the limits set forth in the regulations cited
above. The public dose limit of 25 millirem (mrem) (0.25 millisievert
(mSv)) in 40 CFR part 190 applies to all reactors that may be on a site
and also includes any other nearby nuclear facilities. Currently, there
is no other nuclear power reactor or uranium fuel cycle facility
located near GGNS Unit 1. However, as previously discussed, Entergy is
considering the construction of an additional nuclear power reactor at
the GGNS site. The NRC staff reviewed several years of radiation dose
data contained in the licensee's annual radioactive effluent release
reports for GGNS Unit 1. The data demonstrate that the dose to members
of the public from radioactive effluents is within the limits of 10 CFR
part 20 and 40 CFR part 190. To evaluate the projected dose at EPU
power levels for GGNS Unit 1, the NRC staff increased the actual dose
data contained in the reports by 13 percent. The projected doses for
GGNS Unit 1 at EPU power level remained within regulatory limits. The
NRC staff expects continued compliance with NRC's and EPA's public dose
limits during operation at the proposed EPU power level and at the
proposed new reactor, if it is constructed and operated. Therefore, the
NRC staff concludes that there would not be a significant cumulative
radiological impact to members of the public from increased radioactive
effluents from GGNS Unit 1 at the proposed EPU operation and the
proposed new reactor.
As previously discussed, the licensee has a radiation protection
program that maintains worker doses within the dose limits in 10 CFR
part 20 during all phases of GGNS Unit 1 operations. The NRC staff
expects continued compliance with NRC's occupational dose limits during
operation at the proposed EPU power level and at the proposed new
reactor, if it is constructed and operated.
Therefore, the NRC staff concludes that operation of GGNS Unit 1 at
the proposed EPU power level and the proposed new reactor would not
result in a significant impact to the worker's cumulative radiological
dose.
Radiological Impacts Summary
As discussed above, the proposed EPU would not result in any
significant radiological impacts. Table 3 summarizes the radiological
environmental impacts of the proposed EPU at GGNS Unit 1.
Table 3--Summary of Radiological Environmental Impacts
------------------------------------------------------------------------
------------------------------------------------------------------------
Radioactive Gaseous Effluents Amount of additional radioactive gaseous
effluents generated would be handled by
the existing system.
Radioactive Liquid Effluents. Amount of additional radioactive liquid
effluents generated would be handled by
the existing system.
Occupational Radiation Doses. Occupational doses would continue to be
maintained within NRC limits.
Offsite Radiation Doses...... Radiation doses to members of the public
would remain below NRC and EPA radiation
protection standards.
Radioactive Solid Waste...... Amount of additional radioactive solid
waste generated would be handled by the
existing system.
Spent Nuclear Fuel........... The spent fuel characteristics will
remain within the bounding criteria used
in the impact analysis in 10 CFR part
51, Table S-3, and Table S-4.
Postulated Design-Basis Calculated doses for postulated design-
Accident Doses. basis accidents would remain within NRC
limits.
[[Page 41824]]
Cumulative Radiological...... Radiation doses to the public and plant
workers would remain below NRC and EPA
radiation protection standards.
------------------------------------------------------------------------
Alternatives to the Proposed Action
As an alternative to the proposed action, the NRC staff considered
denial of the proposed EPU (i.e., the ``no-action'' alternative).
Denial of the application would result in no change in the current
environmental impacts. However, if the EPU were not approved for GGNS
Unit 1, other agencies and electric power organizations may be required
to pursue other means, such as fossil fuel or alternative fuel power
generation, to provide electric generation capacity to offset future
demand. Construction and operation of such a fossil-fueled or
alternative-fueled plant could result in impacts in air quality, land
use, and waste management greater than those identified for the
proposed EPU for GGNS Unit 1.
Alternative Use of Resources
The action does not involve the use of any different resources than
those previously considered in the GGNS FES.
III. Finding of No Significant Impact
On the basis of the details provided in the EA, the NRC concludes
that granting the proposed EPU license amendment is not expected to
cause impacts significantly greater than current operations. Therefore,
the proposed action of implementing the EPU for GGNS Unit 1 will not
have a significant effect on the quality of the human environment
because no significant permanent changes are involved, and the
temporary impacts are within previously disturbed areas at the site and
the capacity of the plant systems. As discussed in the EA, if any new
land disturbances are required to support the proposed EPU, those
activities will be conducted in accordance with State and Federal
permits to ensure the potential impacts are not significant.
Accordingly, the NRC has determined not to prepare an environmental
impact statement for the proposed action.
For the Nuclear Regulatory Commission.
Dated at Rockville, Maryland, this 9th day of July 2012.
Michael T. Markley,
Chief, Plant Licensing Branch IV, Division of Operating Reactor
Licensing, Office of Nuclear Reactor Regulation.
[FR Doc. 2012-17228 Filed 7-13-12; 8:45 am]
BILLING CODE 7590-01-P