Exelon Generation Company, LLC; LaSalle County Station, Units 1 and 2, 46062-46066 [2015-18890]
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Federal Register / Vol. 80, No. 148 / Monday, August 3, 2015 / Notices
I. Obtaining Information and
Submitting Comments
A. Obtaining Information
Please refer to Docket ID NRC–2015–
0183 when contacting the NRC about
the availability of information for this
action. You may obtain publiclyavailable information related to this
action by any of the following methods:
• Federal Rulemaking Web site: Go to
https://www.regulations.gov and search
for Docket ID NRC–2015–0183.
• NRC’s Agencywide Documents
Access and Management System
(ADAMS): You may obtain publiclyavailable documents online in the
ADAMS Public Documents collection 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
proposed draft test plan, ‘‘Testing of
Open Secondary Window-Type Current
Transformers—Test Plan’’ is available in
ADAMS under Accession No.
ML15203A228.
• 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.
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B. Submitting Comments
Please include Docket ID NRC–2015–
0183 in your comment submission.
The NRC cautions you not to include
identifying or contact information that
you do not want to be publicly
disclosed in your comment submission.
The NRC will post all comment
submissions at https://
www.regulations.gov as well as enter the
comment submissions into ADAMS.
The NRC does not routinely edit
comment submissions to remove
identifying or contact information.
If you are requesting or aggregating
comments from other persons for
submission to the NRC, then you should
inform those persons not to include
identifying or contact information that
they do not want to be publicly
disclosed in their comment submission.
Your request should state that the NRC
does not routinely edit comment
submissions to remove such information
before making the comment
submissions available to the public or
entering the comment submissions into
ADAMS.
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II. Discussion
The NRC is issuing for public
comment a proposed draft test plan. The
purpose of this test program is to better
understand and obtain information to
form a technical basis for assessing the
propensity of a secondary fire or damage
to the secondary side circuit or
components as a result of an opencircuited current transformer (CT)
secondary winding. Specifically, the test
program will allow investigation of the
high-voltage in the secondary circuit to
determine if it is sufficient to induce a
fire in the circuit’s insulation at the CT
location or within the secondary circuit.
The NRC is seeking public comment
in order to receive feedback from the
widest range of interested parties and to
ensure that all information relevant to
developing this document is available to
the NRC staff. This document is issued
for comment only and is not intended
for interim use. The NRC will review
public comments received on the
documents, incorporate suggested
changes as necessary, and make the
final test plan available to the public
through ADAMS and https://
www.regulations.gov at Docket ID NRC–
2015–0183, and will be documented in
the final test report. No responses will
be provided to specific commenters in
regards to the disposition of their
comments.
Current transformers (CTs) are widely
used to monitor the current at strategic
locations of electrical power
distribution systems in nuclear power
plants (NPPs). The CTs provide
isolation from the high-voltage primary,
and step-down the magnitude of the
measured current to a value that can be
safely handled by the monitoring
instruments. Thus, they are designed to
measure the current in alternating
current (AC) power systems (generally
three-phase systems) in their primary
winding and transform this current into
a representative low secondary current
for instrumentation used for remote
readout of the current. An open-circuit
in a CT’s secondary winding can cause
high voltages on the secondary circuit as
the CT attempts to maintain the current
relationship dictated by the
transformer’s winding turns ratio. The
resulting high voltage condition in the
secondary circuit from an opencircuited CT introduces a potential
failure mode that warrants further
investigation as part of the final
resolution of circuit failure issues
associated with the fire protection
strategies at nuclear power plants.
Specifically, an open circuit on a high
voltage CT circuit may result in
secondary damage, possibly resulting in
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the occurrence of an additional fire in
the location of the CT itself or at a
location remote to the CT. This potential
event is described in Section 3.5.2.1 of
the NEI 00–01, Revision 2 (ADAMS
Accession No. ML091770265), and
endorsed by Regulatory Guide 1.189,
Revision 2 (ADAMS under Accession
No. ML092580550).
Accordingly, the purpose of this test
program is to better understand and
obtain information to form a technical
basis for assessing the propensity of a
secondary fire or damage to the
secondary side circuit or components
under an open-circuited CT secondary
winding. Specifically, the test program
will allow investigation of the highvoltage in the secondary circuit to
determine if it is sufficient to induce a
fire in the circuit’s insulation at the CT
location or within the secondary circuit.
Dated at Rockville, Maryland, this 27th day
of July 2015.
For the Nuclear Regulatory Commission.
Felix Gonzalez,
Acting Chief, Fire Research Branch, Division
of Risk Analysis, Office of Nuclear Regulatory
Research.
[FR Doc. 2015–18997 Filed 7–31–15; 8:45 am]
BILLING CODE 7590–01–P
NUCLEAR REGULATORY
COMMISSION
[Docket Nos. 50–373 and 50–374; NRC–2
015–0180]
Exelon Generation Company, LLC;
LaSalle County Station, Units 1 and 2
Nuclear Regulatory
Commission.
ACTION: Environmental assessment and
finding of no significant impact;
issuance.
AGENCY:
The U.S. Nuclear Regulatory
Commission (NRC) is considering
issuance of amendments to Facility
Operating License Nos. NPF–11 and
NPF–18 issued to Exelon Generation
Company, LLC (Exelon, the licensee) for
operation of LaSalle County Station
(LSCS), Units 1 and 2, located in LaSalle
County, Illinois. The proposed
amendment would revise the maximum
allowable technical specification (TS)
temperature of the ultimate heat sink for
the plant. The NRC staff is issuing a
final Environmental Assessment (EA)
and Finding of No Significant Impact
(FONSI) associated with the proposed
license amendments.
DATES: The environmental assessment
and finding of no significant impact
referenced in this document is available
on August 3, 2015.
SUMMARY:
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Federal Register / Vol. 80, No. 148 / Monday, August 3, 2015 / Notices
Please refer to Docket ID
NRC–2015–0180 when contacting the
NRC about the availability of
information regarding this document.
You may obtain publically available
information related to this document
using any of the following methods:
• Federal Rulemaking Web site: Go to
https://www.regulations.gov and search
for Docket ID NRC–2015–0180. Address
questions about NRC dockets to Carol
Gallagher; telephone: 301–415–3463;
email: Carol.Gallagher@nrc.gov. For
technical questions, contact the
individual listed in the FOR FURTHER
INFORMATION section of this document.
• NRC’s Agencywide Documents
Access and Management System
(ADAMS): You may obtain publiclyavailable documents online in the
ADAMS Public Documents collection 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 (if it available in
ADAMS) is provided the first time that
a document is referenced. For the
convenience of the reader, the ADAMS
accession numbers are provided in a
table in the AVAILABILITY OF
DOCUMENTS section of this document.
• 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:
Bhalchandra Vaidya, Office of Nuclear
Reactor Regulation; U.S. Nuclear
Regulatory Commission, Washington,
DC 20555–0001; telephone: 301–415–
3308; email: Bhachandra.Vaidya@
nrc.gov.
ADDRESSES:
SUPPLEMENTARY INFORMATION:
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I. Introduction
The NRC is considering issuance of
amendments to Facility Operating
License Nos. NPF–11 and NPF–18
issued to Exelon Generation Company,
LLC for operation of LaSalle County
Station (LSCS), Units 1 and 2, located in
LaSalle County, Illinois, in accordance
with section 50.90 of Title 10 of the
Code of Federal Regulations (10 CFR).
LSCS is located in Brookfield
Township of LaSalle County in
northeastern Illinois. The Illinois River
is 5 miles north of the site. A 2,058-acre
cooling pond provides water for the
station’s condenser cooling. A small
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river screen house, located on the
Illinois River, pumps makeup water to
the cooling pond. The ultimate heat sink
(UHS) for emergency core cooling
consists of an excavated portion of the
cooling pond with an intake flume.
LSCS discharges liquid effluents to the
cooling pond blowdown line, which
subsequently discharges into the Illinois
River.
In accordance with 10 CFR 51.21, the
NRC staff prepared an environmental
assessment documenting its finding.
Based on the results of the EA
documented herein, the NRC has
determined not to prepare any
environmental impact statement for the
proposed license amendment, and is
instead issuing a FONSI in accordance
with 10 CFR 51.32.
II. Environmental Assessment
Plant Site and Environs
LSCS is located in Brookfield
Township in LaSalle County in
northeastern Illinois. The Illinois River
is 5 miles north of the site. Condenser
cooling for the station is provided from
a perched cooling lake of 2,058 acres. A
small river screen house, located on the
Illinois River, provides makeup water to
the cooling lake. The ultimate heat sink
(UHS) for emergency core cooling
consists of an excavated pond integral
with the cooling lake. Liquid effluents
from LSCS are discharged into the
cooling lake blowdown line that
subsequently discharges into the Illinois
River.
Description of the Proposed Action
The proposed action would amend
LSCS TS 3.7.3, ‘‘Ultimate Heat Sink’’ by
changing Surveillance Requirement (SR)
3.7.3.1 and adding a new action
statement. The SR 3.7.3.1 currently
requires verification that the cooling
water temperature supplied to the plant
from the core standby cooling system
pond (i.e., the UHS) be less than or
equal to 101.25 degrees Fahrenheit (°F)
(38.47 degrees Celsius [°C]). The
licensee proposes to change SR 3.7.3.1
to require verification that the UHS
cooling water upper temperature limit is
between 101.25 and 104 °F (38.47 and
40 °C) depending on the time of day.
The proposed SR change would permit
the plant to continue to operate during
times when the UHS cooling water
temperature exceeds 101.25 °F (38.47
°C) but is less than or equal to 104 °F
(40 °C). In addition, the licensee
proposes to add a new action statement
to TS 3.7.3 requiring SR 3.7.3.1,
‘‘temperature verification,’’ be
performed each hour when the cooling
water temperature supplied to the plant
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from the Core Standby Cooling System
pond is greater than or equal to 101 °F
(38.33 °C).
The proposed action to amend TS
3.7.3 is in accordance with the
licensee’s application dated July 12,
2012 (ADAMS Accession No.
ML12200A330), as supplemented by
letters dated September 17, 2012
(ADAMS Accession No. ML122690041),
January 18, 2013 (ADAMS Accession
No. ML13022A476), February 11, 2013
(ADAMS Accession No. ML13042A405),
October 4, 2013 (ADAMS Accession No.
ML13282A339), December 4, 2014
(ADAMS Accession No. ML14352A311),
and April 15, 2015 (ADAMS Accession
No. ML15113B115).
Need for the Proposed Action
The proposed action is needed for
operational flexibility during periods of
high UHS temperature in order to
prevent any unnecessary plant
shutdown. The licensee states that
recent summer weather conditions have
resulted in the UHS temperature limit
being challenged. These conditions
include elevated air temperatures, high
humidity, and low wind speed. The
current temperature limit does not
account for daytime weather effects on
the allowable UHS temperature. The
proposed action will allow the
temperature limit to vary with the
diurnal cycle, thereby better reflecting
the effect of more severe weather
conditions.
Environmental Impacts of the Proposed
Action
The NRC has completed its
environmental evaluation of the
proposed action. No changes would
occur in the types of radioactive
effluents that may be released from the
plant offsite. No significant increase in
the amount of any radioactive effluent
released offsite or significant increase in
occupational or public radiation
exposure is expected from the proposed
action. Separate from the environmental
assessment in this document, the NRC
staff is evaluating the licensee’s analyses
of the potential radiological
consequences of an accident that may
result from the proposed action. The
results of the NRC staff’s safety
evaluation and conclusion will be
documented in a Safety Evaluation (SE).
If the NRC staff concludes in the SE that
all pertinent regulatory requirements are
met by the proposed elevated
temperature limit, then there would be
no significant radiological
environmental impact due to the
proposed action. The NRC staff’s SE will
be issued with the license amendment
if the amendment is approved.
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With regard to potential nonradiological impacts, raising the
maximum allowable temperature of the
UHS would likely result in cooling
pond water temperature increases,
especially during periods of extreme
high air temperature, high humidity,
and low wind. The cooling pond is a
wastewater treatment works as defined
by Illinois Administrative Code (35 IAC
301.415). Under this definition, the
cooling pond is not considered waters of
the State under Illinois Administrative
Code (35 IAC 301.440) or waters of the
United States under the Federal Clean
Water Act (40 CFR 230.3(s)), and so the
cooling pond is not subject to State
water quality standards.
Exelon leases a large portion of the
LSCS cooling pond to the Illinois
Department of Natural Resources
(IDNR), which maintains the LSCS
cooling pond as an outdoor recreation
area for public use and fishing. For
example, IDNR surveys the cooling
pond each year and determines which
fish to stock based on fishermen
preferences, fish abundance, different
species’ tolerance to warm waters,
predator and prey dynamics, and other
factors (Exelon 2002). The cooling pond
can be characterized as a managed
ecosystem where IDNR fish stocking
and other human activities primarily
influence the species composition and
population dynamics. Commonly
stocked species include largemouth bass
(Micropterus salmoides), smallmouth
bass (Micropterus dolomieu), black
crappie (Pomoxis nigromaculatus),
white crappie (Pomoxis annularis),
channel catfish (Ictalurus punctatus),
blue catfish (Ictalurus furcatus), striped
bass hybrid (Morone saxatilis), walleye
(Sander vitreus), bluegill (Lepomis
macrochirus), and other species (Exelon
2002, ADAMS Accession No.
ML021330421). The IDNR (2007 and
2009, ADAMS Accession Nos.
ML15160A289 and ML15160A296)
reported abundant, growing populations
of striped bass hybrids and channel
catfish. Gizzard shad (Dorosoma
cepedianum) and threadfin shad
(Dorosoma petenense)—together called
‘‘shad’’—also occur in the cooling pond.
Shad are not recreationally fished, and
IDNR does not stock them. The IDNR
stocks some recreationally fished
species that consume shad (e.g., catfish
and striped bass) in part to limit the size
of shad populations (Exelon 2002,
ADAMS Accession No. ML021330421).
Raising the maximum allowable
temperature of the UHS could result in
increased cooling pond water
temperatures, especially during extreme
warm weather conditions. Fish kills
would sometimes occur when cooling
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pond temperatures rise above 95 °F (35
°C), the temperature at which most fish
in the cooling pond are thermally
stressed. For example, LSCS has had
four reportable fish kills in the cooling
pond since 2001, including fish kills in
July 2001, June 2005, June 2009, and
August 2010 (Exelon 2014, ADAMS
Accession Nos. ML14343A883 and
ML14343A897). The temperature in the
cooling pond during these events ranged
from 93 °F (33.9 °C) to 101 °F (38.3 °C)
(Exelon 2001, 2009, and 2010, ADAMS
Accession Nos. ML012330070,
ML092040381, and ML102371289,
respectively). In addition, several
smaller non-reportable fish kills have
occurred when the cooling pond was 95
°F (35 °C) or above. The largest fish kill
occurred in July 2001 when IDNR
reported approximately 94,500 dead fish
due to high temperatures that peaked at
98.2 °F (36.9 °C) (Exelon 2001, ADAMS
Accession No. ML012330070). The
IDNR found the maximum temperature
in the cooling pond discharge canal to
be 120 °F (48.9 °C) and dissolved
oxygen levels to range from 6.2 to 18.8
parts per million. The majority of dead
fish (96 percent) were gizzard shad
(90,800) (Exelon 2001, ADAMS
Accession No. ML012330070). The
IDNR identified other dead fish to
include 1,279 carp (cyprinus carpio),
1,143 smallmouth buffalo (Ictiobus
bubalus), 610 freshwater drum
(Aplodinotus grunniens), 345 channel
catfish, 238 striped bass hybrid, 93
smallmouth bass, 24 walleye, 13
bluegill, 12 white bass (Morone
chrysops), 6 yellow bullhead catfish
(Ameiurus natalis), and 4 yellow bass
(M. mississippiensis) (Exelon 2001,
ADAMS Accession No. ML012330070).
Exelon (2001, ADAMS Accession No.
ML012330070) attributed the fish kill to
high water temperatures resulting in
part from a combination of high summer
air temperatures, high dew points, and
low wind speeds.
The majority of the fish in kills since
2001 were either gizzard shad or
threadfin shad (Exelon 2001, 2009, and
2010, ADAMS Accession Nos.
ML012330070, ML092040381, and
ML102371289, respectively). Shad
populations generally recovered within
one year after a kill occurred (Exelon
2002, ADAMS Accession No.
ML021330421), and loss of shad did not
significantly affect the community
dynamics within the cooling pond
(Exelon 2010, ADAMS Accession No.
ML102371289).
The NRC staff determined that an
increase in the number or intensity of
fish kills would not result in a
significant impact because the cooling
pond is a managed ecosystem where
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fish populations affected by fish kills
generally recover within a year and do
not significantly alter the fish
community structure. The NRC staff
also did not identify any long-term
changes from previous fish kills and
many recreationally fished species
continue to grow abundantly within the
cooling pond (IDNR 2007 and 2009,
ADAMS Accession Nos. ML15160A289
and ML15160A296). The most affected
fish species from fish kills are gizzard
shad and threadfin shad, which are
managed partly by stocking predators to
limit shad populations in the cooling
pond (Exelon 2002, ADAMS Accession
No. ML021330421). Lastly, any impacts
from the increased temperatures would
be limited to the cooling pond, which is
a managed ecosystem and sustained by
IDNR’s annual fish stockings.
Some terrestrial species resources,
such as birds or other wildlife, rely on
fish or other aquatic resources from the
cooling pond as a source of food. The
NRC staff does not expect any
significant impacts to birds or other
wildlife because, if a fish kill occurs, the
number of dead fish would be a small
proportion of the total population of fish
in the cooling pond. Furthermore,
during fish kills, birds and other
wildlife consume many of the floating,
dead fish.
In regards to water resources and
ecological resources along and within
the Illinois River, Exelon (2015, ADAMS
Accession No. ML15023A459) reports
that raising the allowable temperature in
the UHS would not result in noticeably
warmer thermal discharges to the
Illinois River. Further, Exelon is
required to administratively control
cooling pond discharges to the Illinois
River in accordance with the current
National Pollutant Discharge
Elimination System (NPDES) permit.
Exelon’s Extreme Heat Implementation
Plan describes procedures for Exelon to
follow during extreme warm weather
events to maintain compliance with the
NPDES permit requirements for thermal
discharges to the Illinois River (Exelon
2015, ADAMS Accession No.
ML15023A459). Therefore, the NRC
staff does not expect any significant
impacts to water resources or ecological
resources within and along the Illinois
River as a result of raising the maximum
allowable intake temperature in the
UHS.
Exelon (2014, ADAMS Accession Nos.
ML14343A883 and ML14343A897)
reports that it is not aware of any Stateor Federally listed species occurring in
the cooling pond. As referenced above,
increasing the allowable temperature at
the UHS intake would not noticeably
affect the discharge temperature of
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effluent released in Illinois River.
Therefore, the NRC staff does not expect
any impacts to State- or Federally listed
species. The NRC staff has identified no
foreseeable land or air quality impacts
given that the proposed action would
not change any land uses on or off site
or result in air emissions beyond what
has already been experienced. In
addition, there would be no
socioeconomic or environmental justice
impacts associated with the proposed
action since no physical change would
occur beyond the site boundaries and
any impacts would be limited to the
cooling pond. Accordingly, the NRC
staff concludes that the proposed action
would have no significant
environmental impacts.
Environmental Impacts of the
Alternatives to the Proposed Action
As an alternative to the proposed
action, the NRC considered denial of the
proposed amendment (i.e., the ‘‘noaction’’ alternative). Denial of the
proposed amendment would have no
impact on current environmental
conditions at LSCS.
Alternative Use of Resources
This action does not involve the use
of any resources not previously
considered in the Final Environmental
Statement (NUREG–0486, ADAMS
Accession No. ML14353A388) for LSCS.
Agencies and Persons Consulted
The staff did not enter into
consultation with any other Federal
Agency or with the State of Illinois
regarding the environmental impact of
the proposed action.
III. Finding of No Significant Impact
The NRC is considering issuing
amendments for Facility Operating
License Nos. NPF–11 and NPF–18,
issued to Exelon for operation of LSCS.
The proposed amendments would
revise SR 3.7.3.1 to require verification
that the cooling water upper TS
temperature limit is between 101.25 and
104 °F (38.47 and 40 °C) depending on
the time of day and to add an action
statement to TS 3.7.3 requiring SR
3.7.3.1 be performed each hour when
the cooling water temperature from the
UHS being supplied to the plant is
greater than or equal to 101 °F (38.3 °C).
The NRC’s evaluation considered
information provided in the licensee’s
application and its associated
supplements, as well as the NRC staff’s
independent review of other
environmental documents. Section IV
below lists the environmental
documents related to the proposed
action and includes information on the
availability of these documents. On the
basis of the EA, the NRC staff concludes
that the proposed action would not have
a significant effect on the quality of the
human environment. Accordingly, the
NRC staff has decided an environmental
impact statement for the proposed
action would not be necessary.
IV. Availability of Documents
The following table identifies the
environmental and other documents
cited in this document and related to
the NRC’s FONSI. These documents are
available for public inspection online
through ADAMS at https://www.nrc.gov/
reading-rm/adams.html or in person at
the NRC’s PDR as previously described.
ADAMS
Accession No.
Document
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Application dated June 12, 2012 ...................................................................................................................................................
Supplemental Response dated September 17, 2012 ...................................................................................................................
Supplemental Response dated January 18, 2013 ........................................................................................................................
Supplemental Response dated February 11, 2013 ......................................................................................................................
Supplemental Response dated October 4, 2013 ..........................................................................................................................
Supplemental Response dated February 20, 2014 ......................................................................................................................
Exelon Generation Company, LLC. 2001. Letter from William Riffer, Regulatory Assurance Manager, LaSalle County Station
to U.S. NRC, Document Control Desk. Subject: Environmental Non-Routine Event Report for Exelon Generation Company, LLC—LaSalle County Station. August 17, 2001 .............................................................................................................
Exelon Generation Company, LLC. 2002. Letter from Glen T. Kaegi, Regulatory Assurance Manager, LaSalle County Station to U.S. NRC, Document Control Desk. Subject: Environmental Protection Plan and Operating Report Appendix B to
Facility License No. NPF–11 and NPF–18. April 29, 2002 .......................................................................................................
Exelon Generation Company, LLC. 2009. Letter from David Rhoads, Plant Manager, LaSalle County Station to U.S. NRC,
Document Control Desk. Subject: Environmental Non-Routine Event Report for Exelon Generation Company, LLC—LaSalle County Station. July 22, 2009 ..........................................................................................................................................
Exelon Generation Company, LLC. 2010. Letter from Peter J. Karaba, Plant Manager, LaSalle County Station to U.S. NRC,
Document Control Desk. Subject: Environmental Non-Routine Event Report for Exelon Generation Company, LLC—LaSalle County Station. August 25, 2010 ......................................................................................................................................
Exelon Generation Company, LLC. 2014. LaSalle County Station, Units 1 and 2, License Renewal Application, Appendix E,
Applicant’s Environmental Report, Operating License Renewal Stage. December 9, 2014 ....................................................
Exelon Generation Company, LLC (Exelon). 2015. Letter from David M. Gullott, Manager—Licensing, LaSalle County Station to U.S. NRC, Document Control Desk. Subject: Response to Request for Additional Environmental Information Regarding Request to Revise Ultimate Heat Sink Temperature Limits. January 23, 2015 ..........................................................
Illinois Department of Natural Resources. 2007. Status of the Catfish Fishery. Illinois Department of Natural Resources, Division
of
Fisheries.
March
2007.
Available
at:
https://www.dnr.state.il.us/orc/fisheries/07/
07%20catfish%20status%20report.pdf (accessed 21 May 2015) .............................................................................................
[IDNR] Illinois Department of Natural Resources. 2009. Status of the Striped Bass/Hybrid Striped Bass Fishery. Illinois Department of Natural Resources, Division of Fisheries. March 2009. Available at: https://www.prairiestateoutdoors.com/images/uploads/2009_Striped_Bass_Status.pdf (accessed 21 May 2015) ...................................................................................
LaSalle County Station, Units 1 and 2—Request for Additional Environmental Information Regarding Request to Revise Ultimate Heat Sink Temperature Limits ..........................................................................................................................................
NUREG–0486, ‘‘Environmental Statement Related to the Operation of LaSalle County Nuclear Power Station, Unit Nos. 1
and 2, Commonwealth Edison Company,’’ November 1978 .....................................................................................................
Response to Request for Additional Environmental Information Regarding Request to Revise Ultimate Heat Sink Temperature Limits ...................................................................................................................................................................................
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03AUN1
ML12200A330
ML122690041
ML13022A476
ML13042A405
ML13282A339
ML14066A174
ML012330070
ML021330421
ML092040381
ML102371289
ML14343A883
ML14343A897
ML15023A459
ML15160A289
ML15160A296
ML14338A612
ML14353A388
ML15023A459
46066
Federal Register / Vol. 80, No. 148 / Monday, August 3, 2015 / Notices
Dated at Rockville, Maryland, this 24th day
of July 2015.
For the Nuclear Regulatory Commission.
Peter S. Tam,
Senior Project Manager, Plant Licensing
Branch II–2, Division of Operating Reactor
Licensing, Office of Nuclear Reactor
Regulation.
[FR Doc. 2015–18890 Filed 7–31–15; 8:45 am]
BILLING CODE 7590–01–P
NUCLEAR REGULATORY
COMMISSION
[Docket No. 50–443; NRC–2015–0184]
I. Background
NextEra Energy Seabrook, LLC,
Seabrook Station, Unit 1
Nuclear Regulatory
Commission.
ACTION: Exemption; issuance.
AGENCY:
The U.S. Nuclear Regulatory
Commission (NRC) is issuing an
exemption in response to a July 24,
2014, request from NextEra Energy
Seabrook, LLC (NextEra or the licensee),
from specific requirements in NRC’s
regulations, as they pertain to the
establishment of minimum temperature
requirements, for all modes of
operation, based on the material
properties of the material of the reactor
pressure vessel (RPV) closure flange
region that is highly stressed by the bolt
preload.
ADDRESSES: Please refer to Docket ID
NRC–2015–0184 when contacting the
NRC about the availability of
information regarding this document.
You may obtain publicly-available
information related to this document
using any of the following methods:
• Federal Rulemaking Web site: Go to
https://www.regulations.gov and search
for Docket ID NRC–2015–0184. Address
questions about NRC dockets to Carol
Gallagher; telephone: 301–415–3463;
email: Carol.Gallagher@nrc.gov. For
technical questions, contact the
individual listed in the FOR FURTHER
INFORMATION CONTACT section of this
document.
• NRC’s Agencywide Documents
Access and Management System
(ADAMS): You may obtain publiclyavailable documents online in the
ADAMS Public Documents collection 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
mstockstill on DSK4VPTVN1PROD with NOTICES
SUMMARY:
VerDate Sep<11>2014
18:35 Jul 31, 2015
Jkt 235001
document referenced (if that document
is available in ADAMS) is provided the
first time that a document is referenced.
• 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: John
G. Lamb, Office of Nuclear Reactor
Regulation, U.S. Nuclear Regulatory
Commission, Washington, DC 20555–
0001; telephone: 301–415–3100, email:
John.Lamb@nrc.gov.
SUPPLEMENTARY INFORMATION:
NextEra is the holder of Facility
Operating License No. NPF–86, which
authorizes operation of the Seabrook
Station, Unit No. 1 (Seabrook).
The Seabrook facility consists of a
pressurized-water reactor located in
Rockingham County, New Hampshire.
II. Request/Action
By letter dated July 24, 2014 (ADAMS
Accession No. ML14216A404), as
supplemented by letters dated March 9,
April 24, and June 24, 2015 (ADAMS
Accession Nos. ML15072A023,
ML15125A140, and ML15181A262,
respectively), the licensee requested an
exemption from section 50.60 of Title 10
of the Code of Federal Regulations (10
CFR), ‘‘Acceptance criteria for fracture
prevention measures for lightwater
nuclear power reactors for normal
operation,’’ pursuant to 10 CFR 50.12,
‘‘Specific exemptions.’’
Part 50, appendix G requires that
pressure-temperature (P–T) limits be
established for RPVs during normal
operating and hydrostatic or leak rate
testing conditions. Specifically, 10 CFR
part 50, appendix G states that ‘‘[t]he
minimum temperature requirements
. . . pertain to the controlling material,
which is either the material in the
closure flange or the material in the
beltline region with the highest
reference temperature. . . . the
minimum temperature requirements
and the controlling material depend on
the operating condition (i.e., hydrostatic
pressure and leak tests, or normal
operation including anticipated normal
operational occurrences), the vessel
pressure, whether fuel is in the vessel,
and whether the core is critical. The
metal temperature of the controlling
material, in the region of the controlling
material which has the least favorable
combination of stress and temperature,
must exceed the appropriate minimum
temperature requirement for the
condition and pressure of the vessel
specified in Table 1 [of 10 CFR part 50,
PO 00000
Frm 00135
Fmt 4703
Sfmt 4703
appendix G].’’ Footnote 2 to Table 1 in
10 CFR part 50, appendix G specifies
that RPV minimum temperature
requirements related to RPV closure
flange considerations shall be based on
‘‘[t]he highest reference temperature of
the material in the closure flange region
that is highly stressed by bolt preload.’’
By letter dated July 24, 2014, NextEra
submitted a license amendment request
(LAR) to implement a revision of the P–
T operating limits for Seabrook. In
requesting the revisions to the P–T
operating limits, the licensee referenced
a topical report with a methodology that
did not meet some of the requirements
of 10 CFR part 50, appendix G, thus
requiring the exemption pursuant to 10
CFR 50.12. Specifically, the exemption
would permit use of an alternate
methodology contained in WCAP–
17444–P, Revision 0 (ADAMS
Accession No. ML14216A406), ‘‘Reactor
Vessel Closure Head/Vessel Flange
Requirements Evaluation for Seabrook,
Unit 1,’’ October 2011. The exemption
would permit the methodology
contained in WCAP–17444–P, in lieu of
the specific requirements of 10 CFR part
50, appendix G, related to the
establishment of minimum temperature
criteria for all modes of reactor
operation addressed by Table 1 of 10
CFR part 50, appendix G, that are based
on the properties of the material of the
RPV closure flange region, that is highly
stressed by the bolt preload for
pressures greater than 20 percent of the
pre-service hydrostatic test pressure. A
non-proprietary version of WCAP–
17444–P is available in ADAMS under
Accession No. ML14216A406. The
requirements from which NextEra
requested that Seabrook be exempted
shall be referred to, for the purpose of
this exemption, as those requirements
related to the application of footnote (2)
to Table 1 of 10 CFR part 50, appendix
G, for pressures greater than 20 percent
of the pre-service hydrostatic test
pressure. The licensee did not request
exemption from those requirements
related to the application of footnote (2)
to Table 1 of 10 CFR part 50, appendix
G, for pressures less than or equal to 20
percent of the pre-service hydrostatic
test pressure. These minimum
temperature requirements (hereafter
referred to as the minimum bolt-up
temperature requirements) shall remain
in effect for the Technical Specification
(TS) P–T limit curves for all modes of
reactor operation.
WCAP–17444–P documents a linear
elastic fracture mechanics (LEFM)
analysis of postulated flaws in the
Seabrook RPV closure flange region
under normal operating conditions
associated with RPV bolt-up, the 100
E:\FR\FM\03AUN1.SGM
03AUN1
]]>Agencies
[Federal Register Volume 80, Number 148 (Monday, August 3, 2015)]
[Notices]
[Pages 46062-46066]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2015-18890]
-----------------------------------------------------------------------
NUCLEAR REGULATORY COMMISSION
[Docket Nos. 50-373 and 50-374; NRC-2015-0180]
Exelon Generation Company, LLC; LaSalle County Station, Units 1
and 2
AGENCY: Nuclear Regulatory Commission.
ACTION: Environmental assessment and finding of no significant impact;
issuance.
-----------------------------------------------------------------------
SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is considering
issuance of amendments to Facility Operating License Nos. NPF-11 and
NPF-18 issued to Exelon Generation Company, LLC (Exelon, the licensee)
for operation of LaSalle County Station (LSCS), Units 1 and 2, located
in LaSalle County, Illinois. The proposed amendment would revise the
maximum allowable technical specification (TS) temperature of the
ultimate heat sink for the plant. The NRC staff is issuing a final
Environmental Assessment (EA) and Finding of No Significant Impact
(FONSI) associated with the proposed license amendments.
DATES: The environmental assessment and finding of no significant
impact referenced in this document is available on August 3, 2015.
[[Page 46063]]
ADDRESSES: Please refer to Docket ID NRC-2015-0180 when contacting the
NRC about the availability of information regarding this document. You
may obtain publically available information related to this document
using any of the following methods:
Federal Rulemaking Web site: Go to https://www.regulations.gov and search for Docket ID NRC-2015-0180. Address
questions about NRC dockets to Carol Gallagher; telephone: 301-415-
3463; email: Carol.Gallagher@nrc.gov. For technical questions, contact
the individual listed in the FOR FURTHER INFORMATION section of this
document.
NRC's Agencywide Documents Access and Management System
(ADAMS): You may obtain publicly-available documents online in the
ADAMS Public Documents collection 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 (if it available in
ADAMS) is provided the first time that a document is referenced. For
the convenience of the reader, the ADAMS accession numbers are provided
in a table in the AVAILABILITY OF DOCUMENTS section of this document.
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: Bhalchandra Vaidya, Office of Nuclear
Reactor Regulation; U.S. Nuclear Regulatory Commission, Washington, DC
20555-0001; telephone: 301-415-3308; email: Bhachandra.Vaidya@nrc.gov.
SUPPLEMENTARY INFORMATION:
I. Introduction
The NRC is considering issuance of amendments to Facility Operating
License Nos. NPF-11 and NPF-18 issued to Exelon Generation Company, LLC
for operation of LaSalle County Station (LSCS), Units 1 and 2, located
in LaSalle County, Illinois, in accordance with section 50.90 of Title
10 of the Code of Federal Regulations (10 CFR).
LSCS is located in Brookfield Township of LaSalle County in
northeastern Illinois. The Illinois River is 5 miles north of the site.
A 2,058-acre cooling pond provides water for the station's condenser
cooling. A small river screen house, located on the Illinois River,
pumps makeup water to the cooling pond. The ultimate heat sink (UHS)
for emergency core cooling consists of an excavated portion of the
cooling pond with an intake flume. LSCS discharges liquid effluents to
the cooling pond blowdown line, which subsequently discharges into the
Illinois River.
In accordance with 10 CFR 51.21, the NRC staff prepared an
environmental assessment documenting its finding.
Based on the results of the EA documented herein, the NRC has
determined not to prepare any environmental impact statement for the
proposed license amendment, and is instead issuing a FONSI in
accordance with 10 CFR 51.32.
II. Environmental Assessment
Plant Site and Environs
LSCS is located in Brookfield Township in LaSalle County in
northeastern Illinois. The Illinois River is 5 miles north of the site.
Condenser cooling for the station is provided from a perched cooling
lake of 2,058 acres. A small river screen house, located on the
Illinois River, provides makeup water to the cooling lake. The ultimate
heat sink (UHS) for emergency core cooling consists of an excavated
pond integral with the cooling lake. Liquid effluents from LSCS are
discharged into the cooling lake blowdown line that subsequently
discharges into the Illinois River.
Description of the Proposed Action
The proposed action would amend LSCS TS 3.7.3, ``Ultimate Heat
Sink'' by changing Surveillance Requirement (SR) 3.7.3.1 and adding a
new action statement. The SR 3.7.3.1 currently requires verification
that the cooling water temperature supplied to the plant from the core
standby cooling system pond (i.e., the UHS) be less than or equal to
101.25 degrees Fahrenheit ([deg]F) (38.47 degrees Celsius [[deg]C]).
The licensee proposes to change SR 3.7.3.1 to require verification that
the UHS cooling water upper temperature limit is between 101.25 and 104
[deg]F (38.47 and 40 [deg]C) depending on the time of day. The proposed
SR change would permit the plant to continue to operate during times
when the UHS cooling water temperature exceeds 101.25 [deg]F (38.47
[deg]C) but is less than or equal to 104 [deg]F (40 [deg]C). In
addition, the licensee proposes to add a new action statement to TS
3.7.3 requiring SR 3.7.3.1, ``temperature verification,'' be performed
each hour when the cooling water temperature supplied to the plant from
the Core Standby Cooling System pond is greater than or equal to 101
[deg]F (38.33 [deg]C).
The proposed action to amend TS 3.7.3 is in accordance with the
licensee's application dated July 12, 2012 (ADAMS Accession No.
ML12200A330), as supplemented by letters dated September 17, 2012
(ADAMS Accession No. ML122690041), January 18, 2013 (ADAMS Accession
No. ML13022A476), February 11, 2013 (ADAMS Accession No. ML13042A405),
October 4, 2013 (ADAMS Accession No. ML13282A339), December 4, 2014
(ADAMS Accession No. ML14352A311), and April 15, 2015 (ADAMS Accession
No. ML15113B115).
Need for the Proposed Action
The proposed action is needed for operational flexibility during
periods of high UHS temperature in order to prevent any unnecessary
plant shutdown. The licensee states that recent summer weather
conditions have resulted in the UHS temperature limit being challenged.
These conditions include elevated air temperatures, high humidity, and
low wind speed. The current temperature limit does not account for
daytime weather effects on the allowable UHS temperature. The proposed
action will allow the temperature limit to vary with the diurnal cycle,
thereby better reflecting the effect of more severe weather conditions.
Environmental Impacts of the Proposed Action
The NRC has completed its environmental evaluation of the proposed
action. No changes would occur in the types of radioactive effluents
that may be released from the plant offsite. No significant increase in
the amount of any radioactive effluent released offsite or significant
increase in occupational or public radiation exposure is expected from
the proposed action. Separate from the environmental assessment in this
document, the NRC staff is evaluating the licensee's analyses of the
potential radiological consequences of an accident that may result from
the proposed action. The results of the NRC staff's safety evaluation
and conclusion will be documented in a Safety Evaluation (SE). If the
NRC staff concludes in the SE that all pertinent regulatory
requirements are met by the proposed elevated temperature limit, then
there would be no significant radiological environmental impact due to
the proposed action. The NRC staff's SE will be issued with the license
amendment if the amendment is approved.
[[Page 46064]]
With regard to potential non-radiological impacts, raising the
maximum allowable temperature of the UHS would likely result in cooling
pond water temperature increases, especially during periods of extreme
high air temperature, high humidity, and low wind. The cooling pond is
a wastewater treatment works as defined by Illinois Administrative Code
(35 IAC 301.415). Under this definition, the cooling pond is not
considered waters of the State under Illinois Administrative Code (35
IAC 301.440) or waters of the United States under the Federal Clean
Water Act (40 CFR 230.3(s)), and so the cooling pond is not subject to
State water quality standards.
Exelon leases a large portion of the LSCS cooling pond to the
Illinois Department of Natural Resources (IDNR), which maintains the
LSCS cooling pond as an outdoor recreation area for public use and
fishing. For example, IDNR surveys the cooling pond each year and
determines which fish to stock based on fishermen preferences, fish
abundance, different species' tolerance to warm waters, predator and
prey dynamics, and other factors (Exelon 2002). The cooling pond can be
characterized as a managed ecosystem where IDNR fish stocking and other
human activities primarily influence the species composition and
population dynamics. Commonly stocked species include largemouth bass
(Micropterus salmoides), smallmouth bass (Micropterus dolomieu), black
crappie (Pomoxis nigromaculatus), white crappie (Pomoxis annularis),
channel catfish (Ictalurus punctatus), blue catfish (Ictalurus
furcatus), striped bass hybrid (Morone saxatilis), walleye (Sander
vitreus), bluegill (Lepomis macrochirus), and other species (Exelon
2002, ADAMS Accession No. ML021330421). The IDNR (2007 and 2009, ADAMS
Accession Nos. ML15160A289 and ML15160A296) reported abundant, growing
populations of striped bass hybrids and channel catfish. Gizzard shad
(Dorosoma cepedianum) and threadfin shad (Dorosoma petenense)--together
called ``shad''--also occur in the cooling pond. Shad are not
recreationally fished, and IDNR does not stock them. The IDNR stocks
some recreationally fished species that consume shad (e.g., catfish and
striped bass) in part to limit the size of shad populations (Exelon
2002, ADAMS Accession No. ML021330421).
Raising the maximum allowable temperature of the UHS could result
in increased cooling pond water temperatures, especially during extreme
warm weather conditions. Fish kills would sometimes occur when cooling
pond temperatures rise above 95 [deg]F (35 [deg]C), the temperature at
which most fish in the cooling pond are thermally stressed. For
example, LSCS has had four reportable fish kills in the cooling pond
since 2001, including fish kills in July 2001, June 2005, June 2009,
and August 2010 (Exelon 2014, ADAMS Accession Nos. ML14343A883 and
ML14343A897). The temperature in the cooling pond during these events
ranged from 93 [deg]F (33.9 [deg]C) to 101[emsp14] [deg]F (38.3 [deg]C)
(Exelon 2001, 2009, and 2010, ADAMS Accession Nos. ML012330070,
ML092040381, and ML102371289, respectively). In addition, several
smaller non-reportable fish kills have occurred when the cooling pond
was 95 [deg]F (35 [deg]C) or above. The largest fish kill occurred in
July 2001 when IDNR reported approximately 94,500 dead fish due to high
temperatures that peaked at 98.2 [deg]F (36.9 [deg]C) (Exelon 2001,
ADAMS Accession No. ML012330070). The IDNR found the maximum
temperature in the cooling pond discharge canal to be 120 [deg]F (48.9
[deg]C) and dissolved oxygen levels to range from 6.2 to 18.8 parts per
million. The majority of dead fish (96 percent) were gizzard shad
(90,800) (Exelon 2001, ADAMS Accession No. ML012330070). The IDNR
identified other dead fish to include 1,279 carp (cyprinus carpio),
1,143 smallmouth buffalo (Ictiobus bubalus), 610 freshwater drum
(Aplodinotus grunniens), 345 channel catfish, 238 striped bass hybrid,
93 smallmouth bass, 24 walleye, 13 bluegill, 12 white bass (Morone
chrysops), 6 yellow bullhead catfish (Ameiurus natalis), and 4 yellow
bass (M. mississippiensis) (Exelon 2001, ADAMS Accession No.
ML012330070). Exelon (2001, ADAMS Accession No. ML012330070) attributed
the fish kill to high water temperatures resulting in part from a
combination of high summer air temperatures, high dew points, and low
wind speeds.
The majority of the fish in kills since 2001 were either gizzard
shad or threadfin shad (Exelon 2001, 2009, and 2010, ADAMS Accession
Nos. ML012330070, ML092040381, and ML102371289, respectively). Shad
populations generally recovered within one year after a kill occurred
(Exelon 2002, ADAMS Accession No. ML021330421), and loss of shad did
not significantly affect the community dynamics within the cooling pond
(Exelon 2010, ADAMS Accession No. ML102371289).
The NRC staff determined that an increase in the number or
intensity of fish kills would not result in a significant impact
because the cooling pond is a managed ecosystem where fish populations
affected by fish kills generally recover within a year and do not
significantly alter the fish community structure. The NRC staff also
did not identify any long-term changes from previous fish kills and
many recreationally fished species continue to grow abundantly within
the cooling pond (IDNR 2007 and 2009, ADAMS Accession Nos. ML15160A289
and ML15160A296). The most affected fish species from fish kills are
gizzard shad and threadfin shad, which are managed partly by stocking
predators to limit shad populations in the cooling pond (Exelon 2002,
ADAMS Accession No. ML021330421). Lastly, any impacts from the
increased temperatures would be limited to the cooling pond, which is a
managed ecosystem and sustained by IDNR's annual fish stockings.
Some terrestrial species resources, such as birds or other
wildlife, rely on fish or other aquatic resources from the cooling pond
as a source of food. The NRC staff does not expect any significant
impacts to birds or other wildlife because, if a fish kill occurs, the
number of dead fish would be a small proportion of the total population
of fish in the cooling pond. Furthermore, during fish kills, birds and
other wildlife consume many of the floating, dead fish.
In regards to water resources and ecological resources along and
within the Illinois River, Exelon (2015, ADAMS Accession No.
ML15023A459) reports that raising the allowable temperature in the UHS
would not result in noticeably warmer thermal discharges to the
Illinois River. Further, Exelon is required to administratively control
cooling pond discharges to the Illinois River in accordance with the
current National Pollutant Discharge Elimination System (NPDES) permit.
Exelon's Extreme Heat Implementation Plan describes procedures for
Exelon to follow during extreme warm weather events to maintain
compliance with the NPDES permit requirements for thermal discharges to
the Illinois River (Exelon 2015, ADAMS Accession No. ML15023A459).
Therefore, the NRC staff does not expect any significant impacts to
water resources or ecological resources within and along the Illinois
River as a result of raising the maximum allowable intake temperature
in the UHS.
Exelon (2014, ADAMS Accession Nos. ML14343A883 and ML14343A897)
reports that it is not aware of any State- or Federally listed species
occurring in the cooling pond. As referenced above, increasing the
allowable temperature at the UHS intake would not noticeably affect the
discharge temperature of
[[Page 46065]]
effluent released in Illinois River. Therefore, the NRC staff does not
expect any impacts to State- or Federally listed species. The NRC staff
has identified no foreseeable land or air quality impacts given that
the proposed action would not change any land uses on or off site or
result in air emissions beyond what has already been experienced. In
addition, there would be no socioeconomic or environmental justice
impacts associated with the proposed action since no physical change
would occur beyond the site boundaries and any impacts would be limited
to the cooling pond. Accordingly, the NRC staff concludes that the
proposed action would have no significant environmental impacts.
Environmental Impacts of the Alternatives to the Proposed Action
As an alternative to the proposed action, the NRC considered denial
of the proposed amendment (i.e., the ``no-action'' alternative). Denial
of the proposed amendment would have no impact on current environmental
conditions at LSCS.
Alternative Use of Resources
This action does not involve the use of any resources not
previously considered in the Final Environmental Statement (NUREG-0486,
ADAMS Accession No. ML14353A388) for LSCS.
Agencies and Persons Consulted
The staff did not enter into consultation with any other Federal
Agency or with the State of Illinois regarding the environmental impact
of the proposed action.
III. Finding of No Significant Impact
The NRC is considering issuing amendments for Facility Operating
License Nos. NPF-11 and NPF-18, issued to Exelon for operation of LSCS.
The proposed amendments would revise SR 3.7.3.1 to require verification
that the cooling water upper TS temperature limit is between 101.25 and
104 [deg]F (38.47 and 40 [deg]C) depending on the time of day and to
add an action statement to TS 3.7.3 requiring SR 3.7.3.1 be performed
each hour when the cooling water temperature from the UHS being
supplied to the plant is greater than or equal to 101 [deg]F (38.3
[deg]C). The NRC's evaluation considered information provided in the
licensee's application and its associated supplements, as well as the
NRC staff's independent review of other environmental documents.
Section IV below lists the environmental documents related to the
proposed action and includes information on the availability of these
documents. On the basis of the EA, the NRC staff concludes that the
proposed action would not have a significant effect on the quality of
the human environment. Accordingly, the NRC staff has decided an
environmental impact statement for the proposed action would not be
necessary.
IV. Availability of Documents
The following table identifies the environmental and other
documents cited in this document and related to the NRC's FONSI. These
documents are available for public inspection online through ADAMS at
https://www.nrc.gov/reading-rm/adams.html or in person at the NRC's PDR
as previously described.
------------------------------------------------------------------------
ADAMS Accession
Document No.
------------------------------------------------------------------------
Application dated June 12, 2012...................... ML12200A330
Supplemental Response dated September 17, 2012....... ML122690041
Supplemental Response dated January 18, 2013......... ML13022A476
Supplemental Response dated February 11, 2013........ ML13042A405
Supplemental Response dated October 4, 2013.......... ML13282A339
Supplemental Response dated February 20, 2014........ ML14066A174
Exelon Generation Company, LLC. 2001. Letter from ML012330070
William Riffer, Regulatory Assurance Manager,
LaSalle County Station to U.S. NRC, Document Control
Desk. Subject: Environmental Non-Routine Event
Report for Exelon Generation Company, LLC--LaSalle
County Station. August 17, 2001.....................
Exelon Generation Company, LLC. 2002. Letter from ML021330421
Glen T. Kaegi, Regulatory Assurance Manager, LaSalle
County Station to U.S. NRC, Document Control Desk.
Subject: Environmental Protection Plan and Operating
Report Appendix B to Facility License No. NPF-11 and
NPF-18. April 29, 2002..............................
Exelon Generation Company, LLC. 2009. Letter from ML092040381
David Rhoads, Plant Manager, LaSalle County Station
to U.S. NRC, Document Control Desk. Subject:
Environmental Non-Routine Event Report for Exelon
Generation Company, LLC--LaSalle County Station.
July 22, 2009.......................................
Exelon Generation Company, LLC. 2010. Letter from ML102371289
Peter J. Karaba, Plant Manager, LaSalle County
Station to U.S. NRC, Document Control Desk. Subject:
Environmental Non-Routine Event Report for Exelon
Generation Company, LLC--LaSalle County Station.
August 25, 2010.....................................
Exelon Generation Company, LLC. 2014. LaSalle County ML14343A883
Station, Units 1 and 2, License Renewal Application, ML14343A897
Appendix E, Applicant's Environmental Report,
Operating License Renewal Stage. December 9, 2014...
Exelon Generation Company, LLC (Exelon). 2015. Letter ML15023A459
from David M. Gullott, Manager--Licensing, LaSalle
County Station to U.S. NRC, Document Control Desk.
Subject: Response to Request for Additional
Environmental Information Regarding Request to
Revise Ultimate Heat Sink Temperature Limits.
January 23, 2015....................................
Illinois Department of Natural Resources. 2007. ML15160A289
Status of the Catfish Fishery. Illinois Department
of Natural Resources, Division of Fisheries. March
2007. Available at: https://www.dnr.state.il.us/orc/fisheries/07/07%20catfish%20status%20report.pdf
(accessed 21 May 2015)..............................
[IDNR] Illinois Department of Natural Resources. ML15160A296
2009. Status of the Striped Bass/Hybrid Striped Bass
Fishery. Illinois Department of Natural Resources,
Division of Fisheries. March 2009. Available at:
https://www.prairiestateoutdoors.com/images/uploads/2009_Striped_Bass_Status.pdf (accessed 21 May 2015).
LaSalle County Station, Units 1 and 2--Request for ML14338A612
Additional Environmental Information Regarding
Request to Revise Ultimate Heat Sink Temperature
Limits..............................................
NUREG-0486, ``Environmental Statement Related to the ML14353A388
Operation of LaSalle County Nuclear Power Station,
Unit Nos. 1 and 2, Commonwealth Edison Company,''
November 1978.......................................
Response to Request for Additional Environmental ML15023A459
Information Regarding Request to Revise Ultimate
Heat Sink Temperature Limits........................
------------------------------------------------------------------------
[[Page 46066]]
Dated at Rockville, Maryland, this 24th day of July 2015.
For the Nuclear Regulatory Commission.
Peter S. Tam,
Senior Project Manager, Plant Licensing Branch II-2, Division of
Operating Reactor Licensing, Office of Nuclear Reactor Regulation.
[FR Doc. 2015-18890 Filed 7-31-15; 8:45 am]
BILLING CODE 7590-01-P
