[Federal Register Volume 86, Number 97 (Friday, May 21, 2021)]
[Notices]
[Page 27657]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-10748]


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NUCLEAR REGULATORY COMMISSION

[NRC-2021-0106]


Supplemental Guidance for Radiological Consequence Analyses Using 
Alternative Source Terms

AGENCY: Nuclear Regulatory Commission.

ACTION: Draft interim staff guidance; request for comment.

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SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is soliciting 
public comment on its draft Interim Staff Guidance (ISG) Supplemental 
Guidance for Radiological Consequence Analyses Using Alternative Source 
Terms. This draft ISG proposes changes to the NRC's license amendment 
request (LAR) review guidance document. This ISG is not intended as 
standalone guidance but instead supplements NUREG-0800, ``Standard 
Review Plan for the Review of Safety Analysis Reports for Nuclear Power 
Plants: LWR [Light-Water Reactor] Edition'' Section 15.0.1, 
``Radiological Consequence Analyses Using Alternative Source Terms.'' 
NUREG-0800, Section 15.0.1 was published in July 2000 and is not 
scheduled to be updated for several years. This ISG provides additional 
guidance for the NRC staff reviewing LARs that request to increase the 
main steam isolation valve (MSIV) leakage allowed by technical 
specifications (TS) for boiling water reactors (BWRs).

DATES: Submit comments by June 21, 2021. Comments received after this 
date will be considered if it is practical to do so, but the Commission 
is able to ensure consideration only for comments received before this 
date.

ADDRESSES: You may submit comments by any of the following methods; 
however, the NRC encourages electronic comment submission through the 
Federal Rulemaking website:
     Federal Rulemaking Website: Go to https://www.regulations.gov and search for Docket ID NRC-2021-0106. Address 
questions about Docket IDs in Regulations.gov to Stacy Schumann; 
telephone: 301-415-0624; email: [email protected]. For technical 
questions, contact the individuals listed in the FOR FURTHER 
INFORMATION CONTACT section of this document.
     Mail comments to: Office of Administration, Mail Stop: 
TWFN-7-A60M, U.S. Nuclear Regulatory Commission, Washington, DC 20555-
0001, ATTN: Program Management, Announcements and Editing Staff.
    For additional direction on obtaining information and submitting 
comments, see ``Obtaining Information and Submitting Comments'' in the 
SUPPLEMENTARY INFORMATION section of this document.

FOR FURTHER INFORMATION CONTACT: Jerry Dozier, Office of Nuclear 
Reactor Regulation, U.S. Nuclear Regulatory Commission, Washington, DC 
20555-0001; telephone: 301-415-3925, email: [email protected].

SUPPLEMENTARY INFORMATION:

I. Obtaining Information and Submitting Comments

A. Obtaining Information

    Please refer to Docket ID NRC-2021-0106 when contacting the NRC 
about the availability of information for this action. You may obtain 
publicly available information related to this action by any of the 
following methods:
     Federal Rulemaking Website: Go to https://www.regulations.gov and search for Docket ID NRC-2021-0106.
     NRC's Agencywide Documents Access and Management System 
(ADAMS): You may obtain publicly available documents online in the 
ADAMS Public Documents collection at https://www.nrc.gov/reading-rm/adams.html. To begin the search, 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 proposed ISG, ``Supplemental 
Guidance for Radiological Consequence Analyses Using Alternative Source 
Terms'' is available in ADAMS under Accession No. ML21078A051.
     Attention: The PDR, where you may examine and order copies 
of public documents, is currently closed. You may submit your request 
to the PDR via email at [email protected] or call 1-800-397-4209 or 
301-415-4737, between 8:00 a.m. and 4:00 p.m. (EST), Monday through 
Friday, except Federal holidays.

B. Submitting Comments

    The NRC encourages electronic comment submission through the 
Federal Rulemaking website (https://www.regulations.gov). Please 
include Docket ID NRC-2021-0106 in your comment submission.
    The NRC cautions you not to include identifying or contact 
information that you do not want to be publicly disclosed in your 
comment submission. The NRC will post all comment submissions at 
https://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 
publicly 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 into ADAMS.

II. Background

    This ISG is intended to provide guidance for the NRC staff 
reviewing LARs that request to increase the MSIV leakage allowed by TS 
for BWRs. This ISG is not intended as standalone guidance but instead 
supplements NUREG-0800, ``Standard Review Plan for the Review of Safety 
Analysis Reports for Nuclear Power Plants: LWR [Light-Water Reactor] 
Edition'' Section 15.0.1, ``Radiological Consequence Analyses Using 
Alternative Source Terms'' (ADAMS Accession No. ML003734190).
    As noted in an NRC memorandum, ``Implementing Commission Direction 
on Applying Risk-informed Principles in Regulatory Decision making,'' 
dated November 19, 2019 (ADAMS Accession No. ML19319C832), the staff's 
application of risk-informed decision making continues to evolve as 
improved realism, evaluation techniques, and additional information are 
applied to improve regulatory decision making. The development of this 
ISG serves as an example of NRC's continuous efforts in working toward 
being a more modern and risk-informed regulator.

    Dated: May 17, 2021.

    For the Nuclear Regulatory Commission.
Michael X. Franovich,
Director, Division of Risk Assessment, Office of Nuclear Reactor 
Regulation.
[FR Doc. 2021-10748 Filed 5-20-21; 8:45 am]
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