[Federal Register Volume 77, Number 175 (Monday, September 10, 2012)]
[Notices]
[Pages 55510-55512]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2012-22174]
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NUCLEAR REGULATORY COMMISSION
[NRC-2012-0209]
Guidance on Performing a Seismic Margin Assessment
AGENCY: Nuclear Regulatory Commission.
ACTION: Draft Japan Lessons-Learned Project Directorate guidance;
request for comment.
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SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is issuing for
public comment the draft Japan Lessons-Learned Project Directorate
Interim Staff Guidance (JLD-ISG), JLD-ISG-2012-04, ``Guidance on
Performing a Seismic Margin Assessment in response to the March 2012
Request for Information Letter.'' This draft JLD-ISG provides guidance
on an acceptable method for licensees to carry out a Seismic Margins
Analysis (SMA) method referred to in the seismic portion of a letter
requiring recipients (licensees) to submit information under oath and
affirmation to the NRC.
DATES: Comments must be filed no later than October 10, 2012. Comments
received after this date will be considered, if it is practical to do
so, but the NRC staff is able to ensure
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consideration only for comments received on or before this date.
ADDRESSES: You may access information and comment submissions related
to this document, which the NRC possesses and are publically available,
by searching on http://www.regulations.gov under Docket ID NRC-2012-
0209. You may submit comments by any of the following methods:
Federal Rulemaking Web Site: Go to http://www.regulations.gov and search for Docket ID NRC-2012-0209. Address
questions about NRC dockets to Carol Gallagher, telephone: 301-492-
3668; email: [email protected].
Mail comments to: Cindy Bladey, Chief, Rules,
Announcements, and Directives Branch (RADB), Office of Administration,
Mail Stop: TWB-05-B01M, U.S. Nuclear Regulatory Commission, Washington,
DC 20555-0001.
Fax comments to: RADB at 301-492-3446.
For additional direction on accessing information and submitting
comments, see ``Accessing Information and Submitting Comments'' in the
SUPPLEMENTARY INFORMATION section of this document.
FOR FURTHER INFORMATION CONTACT: Mr. Christopher Gratton, Japan
Lessons-Learned Project Directorate, Office of Nuclear Reactor
Regulation, U.S. Nuclear Regulatory Commission, Washington, DC 20555-
0001; telephone: 301-415-1055; email: [email protected].
SUPPLEMENTARY INFORMATION:
I. Accessing Information and Submitting Comments
A. Accessing Information
Please refer to Docket ID NRC-2012-0209 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 publically available by any of the following methods:
Federal Rulemaking Web Site: Go to http://www.regulations.gov and search for Docket ID NRC-2012-0209.
NRC's Agencywide Document Access and Management System
(ADAMS): You may access publically available documents online in the
NRC Library at http://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 [email protected]. The draft JLD-ISG-2012-04 is
available under ADAMS Accession No. ML12222A327. The 10 CFR 50.54(f)
request letter was issued in March 2012, and can be located under ADAMS
Accession No. ML12053A340.
NRC's PDR: You may examine and purchase copies of public
documents at the NRC's PDR, Room 01-F21, One White Flint North, 11555
Rockville Pike, Rockville, Maryland 20852.
B. Submitting Comments
Please include Docket ID NRC-2012-0209 in the subject line of your
comment submission, in order to ensure that the NRC is able to make
your comment submission available to the public in this docket.
The NRC cautions you not to include identifying or contact
information that you do not want to be publically disclosed in your
comment submission. The NRC will post all comment submissions at http://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
publically 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.
II. Background Information
Following the events at the Fukushima Dai-ichi nuclear power plant
on March 11, 2011, the NRC established a senior-level agency task force
referred to as the Near-Term Task Force (NTTF). The NTTF was tasked
with conducting a systematic and methodical review of the NRC
regulations and processes and determining if the agency should make
additional improvements to those programs in light of the events at
Fukushima Dai-ichi. As a result of this review, the NTTF developed a
comprehensive set of recommendations, documented in SECY-11-0093,
``Near-Term Report and Recommendations for Agency Actions Following the
Events in Japan,'' dated July 12, 2011 (ADAMS Accession No.
ML111861807). These recommendations were enhanced by the NRC staff
following interactions with stakeholders. Documentation of the staff's
efforts is contained in SECY-11-0124, ``Recommended Actions To Be Taken
Without Delay From the Near-Term Task Force Report,'' dated September
9, 2011, (ADAMS Accession No. ML11245A158), and SECY-11-0137,
``Prioritization of Recommended Actions To Be Taken in Response to
Fukushima Lessons Learned,'' dated October 3, 2011 (ADAMS Accession No.
ML11269A204).
As directed by the staff requirements memorandum (SRM) for SECY-11-
0093, the NRC staff reviewed the NTTF recommendations within the
context of the NRC's existing regulatory framework and considered the
various regulatory vehicles available to the NRC to implement the
recommendations. The staff's prioritization of the recommendations was
established in SECY-11-0124 and SECY-11-0137.
In March 2012, the NRC issued Request for Information Pursuant to
Section 50.54(f) of Title 10 of the Code of Federal Regulations (10
CFR), Regarding Recommendations 2.1, 2.3, and 9.3, of the Near-Term
Task Force Review of Insights from the Fukushima Dai-ichi Accident,''
hereafter called the ``March 12, 2012, 50.54(f) letter.'' Enclosure 1
of that letter, ``Recommendation 2.1: Seismic,'' described the actions
related to seismic hazard and risk reassessments to be taken by
licensees in response to the letter. Among the actions discussed in
Enclosure 1 is an SMA method, which may be appropriate for some plants
depending on the outcome of the hazard reassessment phase. Enclosure 1
to the 50.54(f) letter states that the SMA approach should be the NRC
SMA approach (e.g.; NUREG/CR-4334. ``An Approach to the Quantification
of Seismic Margins in Nuclear Power Plants,'' issued in August 1985
(ADAMS Accession No. ML090500182), as enhanced for full-scope plants in
NUREG-1407, ``Procedural and Submittal Guidance for the Individual
Plant Examination of External Events (IPEEE) for Severe Accident
Vulnerabilities,'' ADAMS Accession No. ML063550238.
This draft JLD-ISG, ``Guidance on Performing a Seismic Margin
Assessment in Response to the March 2012, Request for Information
Letter,'' (ADAMS Accession No. ML12222A327) describes the enhancements
to the NRC SMA method described in NUREG/CR-4334 needed to meet the
objectives of the March 12, 2012, 50.54(f) letter. It presents staff
positions on enhancements to the major elements of the NRC SMA and
updates references to allow for use of recent advances in
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methods and guidance. These guidance documents include the American
Society of Mechanical Engineers/American Nuclear Society, ``Standard
for Level 1/Large Early Release Frequency Probabilistic Risk Assessment
for Nuclear Power Plant Applications,'' Standard ASME/ANS RA-Sa-2009,
2009 (hereafter called the ASME/ANS PRA standard) and the Screening,
Prioritization, and Implementation document (SPID) currently under
development by the Nuclear Energy Institute (with NRC staff input) for
NRC endorsement.
Licensees may propose other methods for satisfying these
requirements. The NRC staff will review such methods and determine
their acceptability on a case-by-case basis.
This guidance, at this time, is only intended to be used for an SMA
conducted in response to the 50.54(f) letter, and not for other
purposes.
The NRC ISG DC/COL-ISG-020, ``Seismic Margin Analysis for New
Reactors Based on Probabilistic Risk Assessment'' (ADAMS Accession No.
ML100491233), remains the NRC's current guidance for application to new
reactors. The contents of this draft JLD-ISG have no implications for
NRC ISG DC/COL-ISG-020, the ASME/ANS PRA standard, or any other
document.
The draft JLD-ISG is not a substitute for the requirements in the
March 12, 2012, 50.54(f) letter and compliance with the draft JLD-ISG
is not required. This draft JLD-ISG is being issued in draft form for
public comment to involve the public in developing the regulatory
positions.
Proposed Action
By this action, the NRC is requesting public comments on draft JLD-
ISG-2012-04. This draft JLD-ISG proposes guidance related to
requirements contained in the seismic portion of the March 12, 2012,
50.54(f) letter. The NRC staff will make a final determination
regarding issuance of the JLD-ISG after it considers any public
comments received in response to this request.
For the Nuclear Regulatory Commission.
Dated at Rockville, Maryland, this 4th day of September, 2012.
David L. Skeen,
Director, Japan Lessons-Learned Project Directorate, Office of Nuclear
Reactor Regulation.
[FR Doc. 2012-22174 Filed 9-7-12; 8:45 am]
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