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7 June 2011

Testing of Pressurized Water Reactors Emergency Core Cooling Systems

[Federal Register Volume 76, Number 109 (Tuesday, June 7, 2011)]
[Proposed Rules]
[Pages 32878-32879]
From the Federal Register Online via the Government Printing Office []
[FR Doc No: 2011-13970]

Proposed Rules
                                                Federal Register

This section of the FEDERAL REGISTER contains notices to the public of 
the proposed issuance of rules and regulations. The purpose of these 
notices is to give interested persons an opportunity to participate in 
the rule making prior to the adoption of the final rules.


Federal Register / Vol. 76, No. 109 / Tuesday, June 7, 2011 / 
Proposed Rules

[[Page 32878]]



10 CFR Part 50


Draft Regulatory Guide: Issuance, Availability

AGENCY: Nuclear Regulatory Commission.

ACTION: Notice of Issuance and Availability of Draft Regulatory Guide, 
DG-1253, ``Preoperational Testing of Emergency Core Cooling Systems for 
Pressurized-Water Reactors''.


FOR FURTHER INFORMATION CONTACT: Mekonen M. Bayssie, Regulatory Guide 
Development Branch, Division of Engineering, Office of Nuclear 
Regulatory Research, U.S. Nuclear Regulatory Commission, Washington, DC 
20555-0001, telephone: 301-251-7489 or e-mail: Mekonen


I. Introduction

    The U.S. Nuclear Regulatory Commission (NRC) is issuing for public 
comment a draft guide in the agency's ``Regulatory Guide'' series. This 
series was developed 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.
    The draft regulatory guide (DG), entitled, ``Preoperational Testing 
of Emergency Core Cooling Systems for Pressurized-Water Reactors,'' is 
temporarily identified by its task number, DG-1253, which should be 
mentioned in all related correspondence. DG-1253 is proposed Revision 2 
of Regulatory Guide 1.79, dated September 1975.
    This guide describes methods that the NRC's staff considers 
acceptable to implement Title 10, of the Code of Federal Regulations, 
part 50, ``Domestic Licensing of Production and Utilization 
Facilities'' (10 CFR part 50), Appendix A, ``General Design Criteria 
for Nuclear Power Plants,'' with regard to preoperational testing 
features of emergency core cooling systems (ECCSs) for pressurized-
water reactors (PWRs). This regulatory guide also describes methods 
that the NRC staff finds acceptable for preoperational testing of ECCS 
structures, systems, and components (SSCs), in accordance with the 
regulations in 10 CFR part 52, ``Licenses, Certifications, and 
Approvals for Nuclear Power Plants,'' Subpart B, ``Standard Design 
Certifications,'' and Subpart C,'' Combined Licenses.''

II. Further Information

    The NRC staff is soliciting comments on DG-1253. Comments may be 
accompanied by relevant information or supporting data and should 
mention DG-1253 in the subject line. Comments submitted in writing or 
in electronic form will be made available to the public in their 
entirety through the NRC's Agencywide Documents Access and Management 
System (ADAMS).

ADDRESSES: Please include Docket ID NRC-2011-0129 in the subject line 
of your comments. Comments submitted in writing or in electronic form 
will be posted on the NRC Web site and on the Federal rulemaking Web 
site, 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 may submit comments by any one of the following 
     Federal Rulemaking Web Site: Go to and 
search for documents filed under Docket ID NRC-2011-0129. Address questions 
about NRC dockets to Carol Gallagher, telephone: 301-492-3668; e-mail:
     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.
    You can access publicly available documents related to this notice 
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 Agencywide Documents Access and Management System 
(ADAMS): Publicly available documents created or received at the NRC 
are available online in the NRC Library at 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 e-mail 
to The Regulatory Analysis is available 
electronically under ADAMS Accession Number ML110110489.

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     Federal Rulemaking Web Site: Public comments and 
supporting materials related to this notice can be found at by searching on Docket ID NRC-2011-0129.
    Comments would be most helpful if received by August 5, 2011. 
Comments received after that date will be considered if it is practical 
to do so, but the NRC is able to ensure consideration only for comments 
received on or before this date. Although a time limit is given, 
comments and suggestions in connection with items for inclusion in 
guides currently being developed or improvements in all published 
guides are encouraged at any time.
    Electronic copies of DG-1253 are available through the NRC's public 
Web site under Draft Regulatory Guides in the ``Regulatory Guides'' 
collection of

[[Page 32879]]

the NRC's Electronic Reading Room at Electronic copies are 
also available in ADAMS (, 
under Accession No. ML110110480.

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    Regulatory guides are not copyrighted, and Commission approval is 
not required to reproduce them.

    Dated at Rockville, Maryland, this 27th day of May, 2011.

    For the Nuclear Regulatory Commission.
Edward O'Donnell,
Acting Chief, Regulatory Guide Development Branch, Division of 
Engineering, Office of Nuclear Regulatory Research.
[FR Doc. 2011-13970 Filed 6-6-11; 8:45 am]