[Federal Register Volume 77, Number 35 (Wednesday, February 22, 2012)]
[Notices]
[Pages 10576-10577]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2012-4096]
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NUCLEAR REGULATORY COMMISSION
[NRC-2011-0295]
Methodology for Low Power/Shutdown Fire PRA
AGENCY: Nuclear Regulatory Commission.
ACTION: Draft NUREG/CR; extension for public comment period.
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SUMMARY: On December 29, 2011 (76 FR 81998), the U.S. Nuclear
Regulatory Commission (NRC) published in the Federal Register a request
for public comment on Draft NUREG/CR-7114, Revision 0, ``Methodology
for Low Power/Shutdown Fire PRA.'' In response to request from members
of the public, the NRC is extending the public comment period until
April 18, 2012.
DATES: The comment period has been extended and expires on April 18,
2012. Comments received after this date will be considered if it is
practical to do so, but the NRC staff is able to ensure consideration
only for comments received on or before this date.
ADDRESSES: Please include Docket ID NRC-2011-0295 in the subject line
of your comments. For additional instructions on submitting comments
and instructions on accessing documents related to this action, see
``Submitting Comments and Accessing Information'' in the SUPPLEMENTARY
INFORMATION section of this document. You may submit comments by any of
the following methods:
Federal Rulemaking Web site: Go to http://www.regulations.gov and search for documents filed under Docket ID NRC-
2011-0295. Address questions about NRC dockets to Carol Gallagher (301)
492-3668; email [email protected].
Mail comments to: 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, or by fax to RADB at (301) 492-
3446.
Fax comments to: RADB at (301) 492-3446.
FOR FURTHER INFORMATION CONTACT: Felix E. Gonzalez, Division of Risk
Analysis, Office of Nuclear Regulatory Research, U.S. Nuclear
Regulatory Commission, Washington, DC 20555-0001; telephone: (301) 251-
7596, email: [email protected].
SUPPLEMENTARY INFORMATION:
Submitting Comments and Accessing Information
Comments submitted in writing or in electronic form will be posted
on the NRC's Web site and on the Federal rulemaking Web site, http://www.regulations.gov. Because your comments will not be edited to remove
any identifying or contact information, the NRC cautions you against
including any information in your submission that you do not want to be
publicly disclosed.
The NRC requests that any party soliciting or aggregating comments
received from other persons for submission to the NRC inform those
persons that the NRC will not edit their comments to remove any
identifying or contact information, and therefore, they should not
include any information in their comments that they do not want
publicly disclosed.
You can access publicly available documents related to this
document using the following methods:
NRC's Public Document Room (PDR): The public may examine
and have copied, for a fee, publicly available documents at the NRC's
PDR, O1-F21, One White Flint North, 11555 Rockville Pike, Rockville,
Maryland 20852.
NRC's Agency-wide Documents Access and Management System
(ADAMS): Publicly available document created or received at the NRC are
available online in the NRC Library at http://www.nrc.gov/reading-rm/adams.html. From this page, the public can gain entry into ADAMS, which
provides text and image files of the NRC's public documents. If you do
not have access to ADAMS or if there are problems in accessing the
documents located in ADAMS, contact the NRC's PDR reference staff at 1-
(800) 397-4209, (301) 415-4737, or by email to [email protected].
The draft NUREG is available electronically under ADAMS Accession No.
ML11353A377. The draft NUREG will also be accessible through the NRC's
public site under draft NUREGs for comment.
Federal Rulemaking Web Site: Public comments and
supporting materials related to this notice can be found at http://www.regulations.gov by searching on Docket ID NRC-2011-0295.
Discussion
The draft NUREG presents a probabilistic risk assessment (PRA)
method for quantitatively analyzing fire risk in commercial nuclear
power plants during low power operation and shutdown (LPSD) conditions,
including the determination of core damage
[[Page 10577]]
frequency (CDF) and large early release frequency (LERF). Future
updates are expected to be made to this document as experience is
gained with LPSD quantitative risk analyses of both internal events and
fires.
The NRC developed this LPSD fire quantitative risk method so
analysts would be able to use a quantitative approach for estimating
fire risk during LPSD conditions. While current LPSD safety analyses
for fires performed under National Fire Protection Association Standard
805 (NFPA 805) focus on qualitative, defense-in-depth methods, it is
envisioned that applications in the future may evolve to a more
quantitative method.
Dated at Rockville, Maryland, this 14th day of February, 2012.
For the Nuclear Regulatory Commission.
Mark H. Salley,
Chief, Fire Research Branch, Division of Risk Analysis, Office of
Nuclear Regulatory Research.
[FR Doc. 2012-4096 Filed 2-21-12; 8:45 am]
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