[Federal Register Volume 72, Number 148 (Thursday, August 2, 2007)]
[Notices]
[Page 42442]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E7-15036]


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NUCLEAR REGULATORY COMMISSION


Clarification to Regulatory Guide 1.200, Revision 1

AGENCY: Nuclear Regulatory Commission.

ACTION: Clarification to Regulatory Guide.

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FOR FURTHER INFORMATION CONTACT: Mary Drouin, U.S. Nuclear Regulatory 
Commission, Washington, DC 20555-0001. Telephone: 301-415-6675; e-mail: 
[email protected].

Introduction

    The U.S. Nuclear Regulatory Commission (NRC) is issuing a 
clarification to an existing guide in the agency's regulatory guide 
(RG) series. The NRC has developed this series to describe and make 
available to the public such information as methods that are acceptable 
to the NRC staff for implementing specific parts of the NRC's 
regulations, techniques that the staff uses in evaluating specific 
problems or postulated accidents, and data that the staff needs in its 
review of applications for permits and licenses.
    At this time, the NRC is issuing a clarification to Revision 1 of 
RG 1.200, ``An Approach for Determining the Technical Adequacy of 
Probabilistic Risk Assessment Results for Risk-Informed Activities,'' 
issued January 2007. The purpose of this clarification is to provide 
additional explanation to the staff's regulatory position with regard 
to defining the technical acceptability of a probabilistic risk 
assessment (PRA), specifically with respect to the treatment of the 
sources of model uncertainty and the related assumptions in the base 
PRA.
    The clarification to RG 1.200, Revision 1 can be found in 
Agencywide Documents Access and Management System (ADAMS) Accession 
Number ML071940235.
    The clarification to Regulatory Guide 1.200, Revision 1, is 
intended for licensees of nuclear power plants. Revision 1 of this RG 
remains in effect for licensees of nuclear power plants.
    The NRC staff encourages and welcomes comments and suggestions in 
connection with improvements to published RGs, as well as items for 
inclusion in RGs that are currently under development. You may submit 
comments by any of the following methods.
    1. Mail comments to: Rulemaking, Directives and Editing Branch, 
Office of Administration, U.S. Nuclear Regulatory Commission, 
Washington, DC 20555-0001.
    2. Hand-deliver comments to: Rulemaking, Directives and Editing 
Branch, Office of Administration, U.S. Nuclear Regulatory Commission, 
11555 Rockville Pike, Rockville, Maryland 20852, between 7:30 a.m. and 
4:15 p.m. on Federal workdays.
    3. Fax comments to: Rulemaking, Directives and Editing Branch, 
Office of Administration, U.S. Nuclear Regulatory Commission at (301) 
415-5144.
    4. Direct requests for technical information about this 
clarification to Revision 1 of RG 1.200 to Ms. Mary Drouin at (301) 
415-6675 or [email protected].
    RGs are available for inspection or downloading through the NRC's 
public Web site at http://www.nrc.gov/reading-rm/doc-collections/reg-guides/. In addition, this clarification to Revision 1 of RG 1.200 is 
available for inspection or downloading through the Agencywide 
Documents Access and Management System (ADAMS) at http://www.nrc.gov/reading-rm/adams.html under ADAMS Accession No. ML071940235.
    The clarification to Revision 1 of RG 1.200 and other related 
publicly available documents can also be viewed electronically on 
computers in the NRC's Public Document Room (PDR), which is located at 
11555 Rockville Pike, Rockville, Maryland. The reproduction contractor 
at the PDR will make copies of documents for a fee. The mailing address 
for the PDR is USNRC, PDR, Washington, DC 20555-0001. The PDR can also 
be reached by telephone at (301) 415-4737 or (800) 397-4205, by fax at 
(301) 415-3548, and by e-mail to [email protected].
    RGs are not copyrighted, and Commission approval is not required to 
reproduce them.

    (5 U.S.C. 552(a))

    Dated at Rockville, Maryland, this 27th day of July, 2007.

    For the U.S. Nuclear Regulatory Commission.
Farouk Eltawila,
Director, Division of Risk Assessment and Special Projects, Office of 
Nuclear Regulatory Research.
[FR Doc. E7-15036 Filed 8-1-07; 8:45 am]
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