[Federal Register Volume 87, Number 57 (Thursday, March 24, 2022)]
[Notices]
[Pages 16770-16772]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2022-06222]
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NUCLEAR REGULATORY COMMISSION
[NRC-2022-0052]
Acceptability of Probabilistic Risk Assessment Results for
Advanced Non-Light Water Reactor Risk-Informed Activities
AGENCY: Nuclear Regulatory Commission.
ACTION: Regulatory guide for trial use; request for comment.
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SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is issuing for
public comment and for trial use, a new regulatory guide (RG) 1.247,
``Acceptability of Probabilistic Risk Assessment Results for Non-Light
Water Reactor Risk-Informed Activities.'' This new guidance describes
one acceptable approach for determining whether the acceptability of
the probabilistic risk assessment (PRA) used to support a PRA
application is sufficient to provide confidence in the results for non-
light water reactors (NLWRs) and risk-informed activities. As a trial
RG, this issuance does not provide final staff positions and the
guidance within may be revised based on experience obtained by the NRC
with its use after its publication.
DATES: Submit comments by May 23, 2022. Comments received during this
public comment period will be considered and responded to. The public
comment period will be followed by a 2-year trial use period. At any
time during the trial use period, a member of the public may submit
suggestions to
[[Page 16771]]
the NRC for improvement of existing RGs or for the development of new
RGs. Suggestions can be submitted on the NRC's public website at
https://www.nrc.gov/reading-rm/doc-collections/reg-guides/contactus.html. Suggestions will be considered in future updates and
enhancements to the ``Regulatory Guide'' series. This trial use period
may be extended, as necessary, based on the experience obtained. After
the trial use period, the NRC staff will develop and issue a draft RG
that will include the stakeholder feedback and experience gained from
use of the trial RG. The draft RG issuance will also provide an
additional formal public comment opportunity, with feedback considered
prior to final RG publication.
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-2022-0052. 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 accessing information and submitting
comments, see ``Obtaining Information and Submitting Comments'' in the
SUPPLEMENTARY INFORMATION section of this document.
FOR FURTHER INFORMATION CONTACT: Anders Gilbertson, telephone: 301-415-
1541, email: [email protected], Michelle Gonzalez telephone:
301-415-5661, email: [email protected], or Harriet Karagiannis,
telephone: 301-415-2493, email: [email protected]. These
individuals are staff in the Office of Nuclear Regulatory Research at
the U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001.
SUPPLEMENTARY INFORMATION:
I. Obtaining Information and Submitting Comments
A. Obtaining Information
Please refer to Docket ID NRC-2022-0052 when contacting the NRC
about the availability of information regarding 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-2022-0052.
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, at 301-415-4737,
or by email to [email protected]. The ADAMS accession number for
each document referenced (if it is available in ADAMS) is provided the
first time that it is mentioned in this document.
NRC's PDR: You may examine and purchase copies of public
documents, by appointment, at the NRC's PDR, Room P1 B35, One White
Flint North, 11555 Rockville Pike, Rockville, Maryland 20852. To make
an appointment to visit the PDR, please send an email to
[email protected] or call 1-800-397-4209 or 301-415-4737, between
8:00 a.m. and 4:00 p.m. (ET), 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-2022-0052 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 posts all comment submissions at https://www.regulations.gov as well as enters 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 submissions into ADAMS.
II. Additional Information
The NRC is issuing this new trial RG in the NRC's ``Regulatory
Guide'' series and requesting public comment. This series was developed
to describe methods that are acceptable to the NRC staff for
implementing specific parts of the agency's regulations, to explain
techniques that the staff uses in evaluating specific issues or
postulated events, and to describe information that the staff needs in
its review of applications for permits and licenses.
This RG titled, ``Acceptability of Probabilistic Risk Assessment
Results for Non-Light Water Reactor Risk-Informed Activities,'' is
designated as a trial use RG 1.247 and is available in ADAMS under
Accession No. ML21235A008. It describes one acceptable approach for
determining whether the acceptability of the PRA used to support an
application is sufficient to provide confidence in the results, such
that the PRA can be used in regulatory decision-making for NLWRs for
implementing the requirements in Part 50 and 52 of title 10 of the Code
of Federal Regulations (10 CFR), or future applicable regulations. In
addition, this RG is intended to be consistent with the NRC's PRA
Policy Statement and reflects and endorses, with staff exceptions and
clarifications, national consensus PRA standards provided by standards
development organizations and guidance provided by nuclear industry
organizations.
It is issued as a trial RG since the staff has determined that
additional implementation experience would better inform draft and
final staff positions. Such revisions would involve the development of
a draft RG that would include lessons learned and public comments from
use of this trial RG. The draft RG would also be available for public
comment prior to issuance of a final RG. Therefore, the staff positions
included in this trial RG could be different that the ones that would
be included in the draft and final RG.
The staff is also issuing a regulatory analysis (ADAMS Accession
No. ML21235A010). The staff develops a regulatory analysis to assess
the value of issuing this new regulatory guide as well as alternative
courses of action.
III. Backfitting, Forward Fitting, and Issue Finality
This trial RG does not establish a staff position for purposes of
10 CFR 50.109, ``Backfitting'' or constitute forward fitting as that
term is defined and described in NRC Management Directive
[[Page 16772]]
(MD) 8.4, ``Management of Backfitting, Forward Fitting, Issue Finality,
and Information Requests'' (ADAMS Accession No. ML18093B087). Any
changes to this trial RG, such as withdrawal or addition of or
modification to staff positions based on experience gained during the
trial use period, prior to issuing a final RG will not be considered to
be backfitting as defined in 10 CFR 50.109. This will ensure that the
lessons learned from the regulatory trial use of the pilot applications
of this RG are adequately addressed and that this guidance is
sufficient to enhance regulatory stability in the review and approval
of risk-informed applications for non-light water reactors.
Dated: March 18, 2022.
For the Nuclear Regulatory Commission.
Meraj Rahimi,
Chief, Regulatory Guide and Programs Management Branch, Division of
Engineering, Office of Nuclear Regulatory Research.
[FR Doc. 2022-06222 Filed 3-23-22; 8:45 am]
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