Proposed Generic Communication; Fatigue Analysis of Nuclear Power Plant Components, 24094-24096 [E8-9451]
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24094
Federal Register / Vol. 73, No. 85 / Thursday, May 1, 2008 / Notices
The NRC staff will hold a public
meeting to present an overview of the
draft plant-specific supplement to the
GEIS and to accept public comments on
the document. The public meeting will
be held on May 28, 2008, at the The
Eagles Building, 107 South Market St.,
Berwick, PA 18603. There will be two
sessions to accommodate interested
parties. The first session will convene at
1:30 p.m. and will continue until 4:30
p.m., as necessary. The second session
will convene at 7 p.m. with a repeat of
the overview portions of the meeting
and will continue until 10 p.m., as
necessary. Both meetings will be
transcribed and will include: (1) A
presentation of the contents of the draft
plant-specific supplement to the GEIS,
and (2) the opportunity for interested
government agencies, organizations, and
individuals to provide comments on the
draft report. Additionally, the NRC staff
will host informal discussions one hour
prior to the start of each session at the
same location. No comments on the
draft supplement to the GEIS will be
accepted during the informal
discussions. To be considered,
comments must be provided either at
the transcribed public meeting or in
writing. Persons may pre-register to
attend or present oral comments at the
meeting by contacting Mr. Drew
Stuyvenberg, the NRC Environmental
Project Manager at 1–800–368–5642,
extension 4006, or by e-mail at
SusquehannaEIS@nrc.gov no later than
May 23, 2008. Members of the public
may also register to provide oral
comments within 15 minutes of the start
of each session. Individual, oral
comments may be limited by the time
available, depending on the number of
persons who register. If special
equipment or accommodations are
needed to attend or present information
at the public meeting, the need should
be brought to Mr. Stuyvenberg’s
attention no later than May 16, 2008, to
provide the NRC staff adequate notice to
determine whether the request can be
accommodated.
Mr.
Drew Stuyvenberg, Renewal Projects
Branch 1, Division of License Renewal,
Office of Nuclear Reactor Regulation,
U.S. Nuclear Regulatory Commission,
Mail Stop O–11F1, Washington, DC
20555–0001. Mr. Stuyvenberg may be
contacted at the aforementioned
telephone number or e-mail address.
pwalker on PROD1PC71 with NOTICES
FOR FURTHER INFORMATION, CONTACT:
Dated at Rockville, Maryland, this 25th day
of April, 2008.
VerDate Aug<31>2005
17:13 Apr 30, 2008
Jkt 214001
For the Nuclear Regulatory Commission.
Louise Lund,
Branch Chief, Renewal Projects Branch 1,
Division of License Renewal, Office of Nuclear
Reactor Regulation.
[FR Doc. E8–9593 Filed 4–30–08; 8:45 am]
BILLING CODE 7590–01–P
NUCLEAR REGULATORY
COMMISSION
Sunshine Federal Register Notice
AGENCY HOLDING THE MEETINGS: Nuclear
Regulatory Commission.
DATE: Week of April 28, 2008.
PLACE: Commissioners’ Conference
Room, 11555 Rockville Pike, Rockville,
Maryland.
STATUS: Public and Closed.
ADDITIONAL MATTERS TO BE CONSIDERED:
Week of April 28, 2008
Wednesday, April 30, 2008
12:55 p.m., Affirmation Session (Public
Meeting) (Tentative).
a. Indian Point Nuclear Generating
Units 2 and 3, Docket Nos. 50–247–
LR and 50–286–LR; WestCAN
‘‘Petition for Review’’ of Board
Order denying oral argument on
contention admissibility in the
Indian Point license renewal
proceeding (Tentative).
b. Pacific Gas and Electric Co. Diablo
Canyon ISFSI, San Luis Obispo
Mothers for Peace’s Motion for
Reconsideration of CLI–08–05 &
San Luis Obispo Mothers for
Peace’s Request for Admission of
Late-Filed Contention 6 Re Diablo
Canyon Environmental Assessment
(Tentative).
This meeting will be webcast live at
the Web address—https://www.nrc.gov.
*
*
*
*
*
*The schedule for Commission
meetings is subject to change on short
notice. To verify the status of meetings
call (recording)—(301) 415–1292.
Contact person for more information:
Michelle Schroll, (301) 415–1662.
*
*
*
*
*
Additional Information
By a vote of 4–0 on April 24 and 25,
2008, the Commission determined
pursuant to U.S.C. 552b(e) and
§ 9.107(a) of the Commission’s rules that
‘‘Affirmation of: a. Indian Point Nuclear
Generating Units 2 and 3, Docket Nos.
50–247–LR and 50–286–LR; WestCAN
‘‘Petition for Review’’ of Board Order
denying oral argument on contention
admissibility in the Indian Point license
renewal proceeding (Tentative) and b.
PO 00000
Frm 00057
Fmt 4703
Sfmt 4703
Pacific Gas and Electric Co. Diablo
Canyon ISFSI, San Luis Obispo Mothers
for Peace’s Motion for Reconsideration
of CLI–08–05 & San Luis Obispo
Mothers for Peace’s Request for
Admission of Late-Filed Contention 6
Re Diablo Canyon Environmental
Assessment (Tentative)’’ be held April
30, 2008, and on less than one week’s
notice to the public.
*
*
*
*
*
The NRC Commission Meeting
Schedule can be found on the Internet
at: https://www.nrc.gov/about-nrc/policymaking/schedule.html.
*
*
*
*
*
The NRC provides reasonable
accommodation to individuals with
disabilities where appropriate. If you
need a reasonable accommodation to
participate in these public meetings, or
need this meeting notice or the
transcript or other information from the
public meetings in another format (e.g.
braille, large print), please notify the
NRC’s Disability Program Coordinator,
Rohn Brown, at 301–415–2279, TDD:
301–415–2100, or by e-mail at
Rohn.Brown@nrc.gov. Determinations
on requests for reasonable
accommodation will be made on a caseby-case basis.
*
*
*
*
*
This notice is distributed by mail to
several hundred subscribers; if you no
longer wish to receive it, or would like
to be added to the distribution, please
contact the Office of the Secretary,
Washington, DC 20555 (301–415–1969).
In addition, distribution of this meeting
notice over the Internet system is
available. If you are interested in
receiving this Commission meeting
schedule electronically, please send an
electronic message to dkw@nrc.gov.
Dated: April 28, 2008.
R. Michelle Schroll,
Office of the Secretary.
[FR Doc. 08–1204 Filed 4–29–08; 10:58 am]
BILLING CODE 7590–01–P
NUCLEAR REGULATORY
COMMISSION
Proposed Generic Communication;
Fatigue Analysis of Nuclear Power
Plant Components
Nuclear Regulatory
Commission.
ACTION: Notice of opportunity for public
comment.
AGENCY:
SUMMARY: The U.S. Nuclear Regulatory
Commission (NRC) is proposing to issue
a regulatory issue summary (RIS) to
inform licensees of an analysis
E:\FR\FM\01MYN1.SGM
01MYN1
Federal Register / Vol. 73, No. 85 / Thursday, May 1, 2008 / Notices
methodology used to demonstrate
compliance with the American Society
of Mechanical Engineers Boiler and
Pressure Vessel Code (ASME Code)
fatigue acceptance criteria that could be
nonconservative if not correctly applied.
This Federal Register notice is
available through the NRC’s
Agencywide Documents Access and
Management System (ADAMS) under
accession number ML081080562.
DATES: Comment period expires June 16,
2008. Comments submitted after this
date will be considered if it is practical
to do so, but assurance of consideration
cannot be given except for comments
received on or before this date.
ADDRESSES: Submit written comments
to the Chief, Rulemaking, Directives and
Editing Branch, Division of
Administrative Services, Office of
Administration, U.S. Nuclear Regulatory
Commission, Mail Stop T6-D59,
Washington, DC 20555–0001, and cite
the publication date and page number of
this Federal Register notice. Written
comments may also be delivered to NRC
Headquarters, 11545 Rockville Pike
(Room T–6D59), Rockville, Maryland,
between 7:30 a.m. and 4:15 p.m. on
Federal workdays.
FOR FURTHER INFORMATION, CONTACT:
John R. Fair at 301–415–2759 or by email at John.Fair@nrc.gov.
SUPPLEMENTARY INFORMATION:
NRC Regulatory Issue Summary 2008–
XX
Fatigue Analysis of Nuclear Power
Plant Components
Addressees
All holders of operating licenses for
nuclear power reactors, except those
who have permanently ceased
operations and have certified that fuel
has been permanently removed from the
reactor vessel.
Intent
The U.S. Nuclear Regulatory
Commission (NRC) is issuing this
regulatory issue summary (RIS) to
inform licensees of an analysis
methodology used to demonstrate
compliance with the American Society
of Mechanical Engineers Boiler and
Pressure Vessel Code (ASME Code)
fatigue acceptance criteria that could be
nonconservative if not correctly applied.
pwalker on PROD1PC71 with NOTICES
Background Information
Title 10 of the Code of Federal
Regulations (10 CFR) Part 54,
‘‘Requirements for Renewal of Operating
Licenses for Nuclear Power Plants,’’
requires that applicants for license
renewal perform an evaluation of time-
VerDate Aug<31>2005
17:53 Apr 30, 2008
Jkt 214001
limited aging analyses relevant to
structures, systems, and components
within the scope of license renewal. The
fatigue analysis of the reactor coolant
pressure boundary components is an
issue that involves time-limited
assumptions. In addition, the staff has
provided guidance in NUREG–1800,
Rev. 1, ‘‘Standard Review Plan for
Review of License Renewal
Applications for Nuclear Power Plants,’’
issued September 2005. NUREG–1800,
Rev. 1, specifies that the effects of the
reactor water environment on fatigue
life be evaluated for a sample of
components to provide assurance that
cracking because of fatigue will not
occur during the period of extended
operation. Since the reactor water
environment has a significant impact on
the fatigue life of components, many
license renewal applicants have
performed supplemental detailed
analyses to demonstrate acceptable
fatigue life for these components.
10 CFR 50.55a, ‘‘Codes and
Standards,’’ specifies the ASME Code
requirements for operating reactors.
Some operating facilities may have
performed supplemental detailed
analysis of components because of new
loading conditions identified after the
plant began operation.
Summary of Issue
The staff identified a concern
regarding the methodology used by
some license renewal applicants to
demonstrate the ability of nuclear power
plant components to withstand the
cyclic loads associated with plant
transient operations for the period of
extended operation. This particular
analysis methodology involves the use
of the Green’s function to calculate the
fatigue usage during plant transient
operations such as startups and
shutdowns.
The Green’s function approach
involves performing a detailed stress
analysis of a component to calculate its
response to a step change in
temperature. This detailed analysis is
used to establish an influence function,
which is subsequently used to calculate
the stresses caused by the actual plant
temperature transients. This
methodology has been used to perform
fatigue calculations and as input for online fatigue monitoring programs. The
Green’s function methodology is not in
question. The concern involves a
simplified input for applying the
Green’s function in which only one
value of stress is used for the evaluation
of the actual plant transients. The
detailed stress analysis requires
consideration of six stress components,
as discussed in ASME Code, Section III,
PO 00000
Frm 00058
Fmt 4703
Sfmt 4703
24095
Subsection NB, Subarticle NB–3200.
Simplification of the analysis to
consider only one value of the stress
may provide acceptable results for some
applications; however, it also requires a
great deal of judgment by the analyst to
ensure that the simplification still
provides a conservative result.
The staff has requested that recent
license renewal applicants that have
used this simplified Green’s function
methodology perform confirmatory
analyses to demonstrate that the
simplified Green’s function analyses
provide acceptable results. The
confirmatory analyses retain all six
stress components. To date, the
confirmatory analysis of one
component, a boiling-water reactor
feedwater nozzle, indicated that the
simplified input for the Green’s function
did not produce conservative results in
the nozzle bore area when compared to
the detailed analysis. However, the
confirmatory analysis still demonstrated
that the nozzle had acceptable fatigue
usage.
Licensees may have also used the
simplified Green’s function
methodology in operating plant fatigue
evaluations for the current license term.
For plants with renewed licenses, the
staff is considering additional regulatory
actions if the simplified Green’s
function methodology was used.
Backfit Discussion
This RIS informs addressees of a
potential nonconservative calculation
methodology and reminds them that the
ASME Code fatigue analysis should be
performed properly. For license
renewal, metal fatigue is evaluated as a
time-limited aging analysis in
accordance with 10 CFR 54.21(c). The
associated staff review guidance appears
in Section 4.3, ‘‘Metal Fatigue
Analysis,’’ of NUREG–1800, Rev. 1. For
operating reactors, the ASME Code
requirements appear in 10 CFR 50.55a.
This RIS does not impose a new or
different regulatory staff position. It
requires no action or written response
and, therefore, is not a backfit under 10
CFR 50.109, ‘‘Backfitting.’’
Consequently, the NRC staff did not
perform a backfit analysis.
Federal Register Notification
To be done after the public comment
period.
Congressional Review Act
The NRC has determined that this RIS
is not a rule as designated by the
Congressional Review Act (5 U.S.C.
801–808) and, therefore, is not subject to
the Act.
E:\FR\FM\01MYN1.SGM
01MYN1
24096
Federal Register / Vol. 73, No. 85 / Thursday, May 1, 2008 / Notices
Paperwork Reduction Act Statement
This RIS does not contain information
collection requirements that are subject
to the requirements of the Paperwork
Reduction Act of 1995 (44 U.S.C. 3501
et seq.).
Public Protection Notification
The NRC may not conduct or sponsor,
and a person is not required to respond
to, a request for information or an
information collection requirement
unless the requesting document
displays a currently valid Office of
Management and Budget control
number.
Contact
Please direct any questions about this
matter to the technical contacts listed
below: Michael J. Case, Director,
Division of Policy and Rulemaking,
Office of Nuclear Reactor Regulation.
Technical Contacts: Kenneth C.
Chang, NRR, E-mail:
Kenneth.Chang@nrc.gov, 301–415–1913.
John R. Fair, NRR, 301–415–2759, Email: John.Fair@nrc.gov.
Note: The NRC’ s generic communications
may be found on the NRC public Web site,
https://www.nrc.gov, under Electronic
Reading Room/Document Collections.
End of Draft Regulatory Issue Summary
pwalker on PROD1PC71 with NOTICES
Documents may be examined, and/or
copied for a fee, at the NRC’s Public
Document Room at One White Flint
North, 11555 Rockville Pike (first floor),
Rockville, Maryland. Publicly available
records will be accessible electronically
from the Agencywide Documents
Access and Management System
(ADAMS) Public Electronic Reading
Room on the Internet at the NRC Web
site, https://www.nrc.gov/NRC/ADAMS/
index.html. If you do not have access to
ADAMS or if you have problems in
accessing the documents in ADAMS,
contact the NRC Public Document Room
(PDR) reference staff at 1–800–397–4209
or 301–415–4737 or by e-mail to
pdr@nrc.gov.
Dated at Rockville, Maryland, this 23rd day
of April 2008.
For the Nuclear Regulatory Commission.
Martin C. Murphy,
Chief, Generic Communications Branch,
Division of Policy and Rulemaking, Office
of Nuclear Reactor Regulation.
[FR Doc. E8–9451 Filed 4–30–08; 8:45 am]
BILLING CODE 7590–01–P
NUCLEAR REGULATORY
COMMISSION
POSTAL REGULATORY COMMISSION
[Docket No. 50–247]
NAME OF AGENCY:
Entergy Nuclear Indian Point 2, LLC;
Entergy Nuclear Operations, Inc.;
Notice of Withdrawal of Application for
Amendment to Facility Operating
License No. DPR–26 Indian Point
Nuclear Generating Unit No. 2
The U.S. Nuclear Regulatory
Commission (the Commission) has
granted the request of Entergy Nuclear
Operations, Inc. (the licensee) to
withdraw its March 22, 2007,
application for proposed amendment to
Facility Operating License No. DPR–26
for Indian Point Nuclear Generating
Unit No. 2, located in Westchester
County, New York.
The proposed amendment would
have revised the test acceptance criteria
for the emergency diesel generators
endurance test.
The Commission had previously
issued a Notice of Consideration of
Issuance of Amendment published in
the Federal Register on April 10, 2007
(72 FR 17947). However, by letter dated
April 10, 2008, the licensee withdrew
the proposed change.
For further details with respect to this
action, see the application for
amendment dated March 22, 2007, and
the licensee’s letter dated April 10,
2008, which withdrew the application
for a license amendment. Documents
may be examined, and/or copied for a
fee, at the NRC’s Public Document
Room (PDR), located at One White Flint
North, Public File Area O1 F21, 11555
Rockville Pike (first floor), Rockville,
Maryland. Publicly available records
will be accessible electronically from
the Agencywide Documents Access and
Management Systems (ADAMS) Public
Electronic Reading Room on the internet
at the NRC Web site, https://
www.nrc.gov/reading-rm.html. Persons
who do not have access to ADAMS or
who encounter problems in accessing
the documents located in ADAMS
should contact the NRC PDR Reference
staff by telephone at 1–800–397–4209,
or 301–415–4737 or by e-mail to
pdr@nrc.gov.
Dated at Rockville, Maryland, this 24th day
of April 2008.
For the Nuclear Regulatory Commission.
John P. Boska,
Senior Project Manager, Plant Licensing
Branch I–1, Division of Operating Reactor
Licensing, Office of Nuclear Reactor
Regulation.
[FR Doc. E8–9586 Filed 4–30–08; 8:45 am]
BILLING CODE 7590–01–P
VerDate Aug<31>2005
17:13 Apr 30, 2008
Jkt 214001
Sunshine Act Meetings
PO 00000
Frm 00059
Fmt 4703
Sfmt 4703
Postal Regulatory
Commission.
Tuesday, April 29, 2008
at 9 a.m.
PLACE: Commission conference room,
901 New York Avenue, NW., Suite 200,
Washington, DC 20268–0001.
STATUS: Closed.
MATTERS TO BE CONSIDERED: Docket No.
MC2008–1—consideration of motion to
compel.
FOR FURTHER INFORMATION CONTACT:
Stephen L. Sharfman, General Counsel,
Postal Regulatory Commission, 901 New
York Avenue, NW., Suite 200,
Washington, DC 20268–0001, 202–789–
6818.
TIME AND DATE:
Dated: April 28, 2008.
Steven W. Williams,
Secretary.
[FR Doc. 08–1205 Filed 4–29–08; 11:38 am]
BILLING CODE 7710–FW–P
POSTAL SERVICE
Sunshine Act Meeting
Tuesday, May 6, 2008, at
11:30 a.m.; and Wednesday, May 7,
2008, at 8:30 a.m. and 10:30 a.m.
PLACE: Washington, DC, at U.S. Postal
Service Headquarters, 475 L’Enfant
Plaza, SW., in the Benjamin Franklin
Room.
STATUS: May 6—11:30 a.m.—Closed;
May 7—8:30 a.m.—Open; May 7—10:30
a.m.—Closed.
DATE AND TIME:
MATTERS TO BE CONSIDERED
Tuesday, May 6 at 11:30 a.m. (Closed)
1. Strategic Issues.
2. Product Pricing.
3. Financial Update.
4. Personnel Matters and
Compensation Issues.
5. Governors’ Executive Session—
Discussion of prior agenda items and
Board Governance.
Wednesday, May 7 at 8:30 a.m. (Open)
1. Minutes of the Previous Meetings,
April 1–2, and April 14, 2008.
2. Remarks of the Chairman of the
Board.
3. Remarks of the Postmaster General
and CEO.
4. Committee Reports.
Wednesday, May 7 at 8:30 am. (Open)
[continued]
5. Quarterly Report on Service
Performance.
E:\FR\FM\01MYN1.SGM
01MYN1
Agencies
[Federal Register Volume 73, Number 85 (Thursday, May 1, 2008)]
[Notices]
[Pages 24094-24096]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E8-9451]
-----------------------------------------------------------------------
NUCLEAR REGULATORY COMMISSION
Proposed Generic Communication; Fatigue Analysis of Nuclear Power
Plant Components
AGENCY: Nuclear Regulatory Commission.
ACTION: Notice of opportunity for public comment.
-----------------------------------------------------------------------
SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is proposing to
issue a regulatory issue summary (RIS) to inform licensees of an
analysis
[[Page 24095]]
methodology used to demonstrate compliance with the American Society of
Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code)
fatigue acceptance criteria that could be nonconservative if not
correctly applied.
This Federal Register notice is available through the NRC's
Agencywide Documents Access and Management System (ADAMS) under
accession number ML081080562.
DATES: Comment period expires June 16, 2008. Comments submitted after
this date will be considered if it is practical to do so, but assurance
of consideration cannot be given except for comments received on or
before this date.
ADDRESSES: Submit written comments to the Chief, Rulemaking, Directives
and Editing Branch, Division of Administrative Services, Office of
Administration, U.S. Nuclear Regulatory Commission, Mail Stop T6-D59,
Washington, DC 20555-0001, and cite the publication date and page
number of this Federal Register notice. Written comments may also be
delivered to NRC Headquarters, 11545 Rockville Pike (Room T-6D59),
Rockville, Maryland, between 7:30 a.m. and 4:15 p.m. on Federal
workdays.
FOR FURTHER INFORMATION, CONTACT: John R. Fair at 301-415-2759 or by e-
mail at John.Fair@nrc.gov.
SUPPLEMENTARY INFORMATION:
NRC Regulatory Issue Summary 2008-XX
Fatigue Analysis of Nuclear Power Plant Components
Addressees
All holders of operating licenses for nuclear power reactors,
except those who have permanently ceased operations and have certified
that fuel has been permanently removed from the reactor vessel.
Intent
The U.S. Nuclear Regulatory Commission (NRC) is issuing this
regulatory issue summary (RIS) to inform licensees of an analysis
methodology used to demonstrate compliance with the American Society of
Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code)
fatigue acceptance criteria that could be nonconservative if not
correctly applied.
Background Information
Title 10 of the Code of Federal Regulations (10 CFR) Part 54,
``Requirements for Renewal of Operating Licenses for Nuclear Power
Plants,'' requires that applicants for license renewal perform an
evaluation of time-limited aging analyses relevant to structures,
systems, and components within the scope of license renewal. The
fatigue analysis of the reactor coolant pressure boundary components is
an issue that involves time-limited assumptions. In addition, the staff
has provided guidance in NUREG-1800, Rev. 1, ``Standard Review Plan for
Review of License Renewal Applications for Nuclear Power Plants,''
issued September 2005. NUREG-1800, Rev. 1, specifies that the effects
of the reactor water environment on fatigue life be evaluated for a
sample of components to provide assurance that cracking because of
fatigue will not occur during the period of extended operation. Since
the reactor water environment has a significant impact on the fatigue
life of components, many license renewal applicants have performed
supplemental detailed analyses to demonstrate acceptable fatigue life
for these components.
10 CFR 50.55a, ``Codes and Standards,'' specifies the ASME Code
requirements for operating reactors. Some operating facilities may have
performed supplemental detailed analysis of components because of new
loading conditions identified after the plant began operation.
Summary of Issue
The staff identified a concern regarding the methodology used by
some license renewal applicants to demonstrate the ability of nuclear
power plant components to withstand the cyclic loads associated with
plant transient operations for the period of extended operation. This
particular analysis methodology involves the use of the Green's
function to calculate the fatigue usage during plant transient
operations such as startups and shutdowns.
The Green's function approach involves performing a detailed stress
analysis of a component to calculate its response to a step change in
temperature. This detailed analysis is used to establish an influence
function, which is subsequently used to calculate the stresses caused
by the actual plant temperature transients. This methodology has been
used to perform fatigue calculations and as input for on-line fatigue
monitoring programs. The Green's function methodology is not in
question. The concern involves a simplified input for applying the
Green's function in which only one value of stress is used for the
evaluation of the actual plant transients. The detailed stress analysis
requires consideration of six stress components, as discussed in ASME
Code, Section III, Subsection NB, Subarticle NB-3200. Simplification of
the analysis to consider only one value of the stress may provide
acceptable results for some applications; however, it also requires a
great deal of judgment by the analyst to ensure that the simplification
still provides a conservative result.
The staff has requested that recent license renewal applicants that
have used this simplified Green's function methodology perform
confirmatory analyses to demonstrate that the simplified Green's
function analyses provide acceptable results. The confirmatory analyses
retain all six stress components. To date, the confirmatory analysis of
one component, a boiling-water reactor feedwater nozzle, indicated that
the simplified input for the Green's function did not produce
conservative results in the nozzle bore area when compared to the
detailed analysis. However, the confirmatory analysis still
demonstrated that the nozzle had acceptable fatigue usage.
Licensees may have also used the simplified Green's function
methodology in operating plant fatigue evaluations for the current
license term. For plants with renewed licenses, the staff is
considering additional regulatory actions if the simplified Green's
function methodology was used.
Backfit Discussion
This RIS informs addressees of a potential nonconservative
calculation methodology and reminds them that the ASME Code fatigue
analysis should be performed properly. For license renewal, metal
fatigue is evaluated as a time-limited aging analysis in accordance
with 10 CFR 54.21(c). The associated staff review guidance appears in
Section 4.3, ``Metal Fatigue Analysis,'' of NUREG-1800, Rev. 1. For
operating reactors, the ASME Code requirements appear in 10 CFR 50.55a.
This RIS does not impose a new or different regulatory staff position.
It requires no action or written response and, therefore, is not a
backfit under 10 CFR 50.109, ``Backfitting.'' Consequently, the NRC
staff did not perform a backfit analysis.
Federal Register Notification
To be done after the public comment period.
Congressional Review Act
The NRC has determined that this RIS is not a rule as designated by
the Congressional Review Act (5 U.S.C. 801-808) and, therefore, is not
subject to the Act.
[[Page 24096]]
Paperwork Reduction Act Statement
This RIS does not contain information collection requirements that
are subject to the requirements of the Paperwork Reduction Act of 1995
(44 U.S.C. 3501 et seq.).
Public Protection Notification
The NRC may not conduct or sponsor, and a person is not required to
respond to, a request for information or an information collection
requirement unless the requesting document displays a currently valid
Office of Management and Budget control number.
Contact
Please direct any questions about this matter to the technical
contacts listed below: Michael J. Case, Director, Division of Policy
and Rulemaking, Office of Nuclear Reactor Regulation.
Technical Contacts: Kenneth C. Chang, NRR, E-mail:
Kenneth.Chang@nrc.gov, 301-415-1913. John R. Fair, NRR, 301-415-2759,
E-mail: John.Fair@nrc.gov.
Note: The NRC' s generic communications may be found on the NRC
public Web site, https://www.nrc.gov, under Electronic Reading Room/
Document Collections.
End of Draft Regulatory Issue Summary
Documents may be examined, and/or copied for a fee, at the NRC's
Public Document Room at One White Flint North, 11555 Rockville Pike
(first floor), Rockville, Maryland. Publicly available records will be
accessible electronically from the Agencywide Documents Access and
Management System (ADAMS) Public Electronic Reading Room on the
Internet at the NRC Web site, https://www.nrc.gov/NRC/ADAMS/.
If you do not have access to ADAMS or if you have problems in accessing
the documents in ADAMS, contact the NRC Public Document Room (PDR)
reference staff at 1-800-397-4209 or 301-415-4737 or by e-mail to
pdr@nrc.gov.
Dated at Rockville, Maryland, this 23rd day of April 2008.
For the Nuclear Regulatory Commission.
Martin C. Murphy,
Chief, Generic Communications Branch, Division of Policy and
Rulemaking, Office of Nuclear Reactor Regulation.
[FR Doc. E8-9451 Filed 4-30-08; 8:45 am]
BILLING CODE 7590-01-P