Level 3 Probabilistic Risk Assessment Project Documentation (Volume 4), 56885-56887 [2023-17401]
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ddrumheller on DSK120RN23PROD with NOTICES1
Federal Register / Vol. 88, No. 160 / Monday, August 21, 2023 / Notices
underrepresented in science and
engineering.
National User Facilities will be
required to submit annual reports on
progress and plans, which will be used
as a basis for performance review and
determining the level of continued
funding. User facilities will be required
to develop a set of management and
performance indicators for submission
annually to NSF via the Research
Performance Project Reporting (RPPR)
module in Research.gov. These
indicators are both quantitative and
descriptive and may include, for
example, lists of successful proposal
and users, the characteristics of facility
personnel and students; sources of
financial support and in-kind support;
expenditures by operational component;
research activities; education activities;
knowledge transfer activities; patents,
licenses; publications; degrees granted
to students supported through the
facility or users of the facility;
descriptions of significant advances and
other outcomes of this investment. Such
reporting requirements are included in
the cooperative agreement which is
binding between the academic
institution and the NSF.
Each facility’s annual report will
address the following categories of
activities: (1) research, (2) education and
training, (3) knowledge transfer, (4)
partnerships, (5) diversity, (6)
management, and (7) budget issues.
For each of the categories the report
will describe overall objectives and
metrics for the reporting period,
challenges or problems the facility has
encountered in making progress towards
goals, anticipated problems in the
following year, and specific outputs and
outcomes.
Facilities are required to file a final
report through the RPPR. Final reports
contain similar information and metrics
as annual reports, but are retrospective
and focus on the period that was not
addressed in previous annual reports.
Use of the Information: NSF will use
the information to continue funding of
the DMR National User Facilities, and to
evaluate the progress of the program.
Estimate of Burden: 200 hours per
facility for three National User Facilities
for a total of 600 hours.
Respondents: Non-profit institutions.
Estimated Number of Responses per
Report: One (1) from each of the DMR
user facilities.
Comments: Comments are invited on
(a) whether the proposed collection of
information is necessary for the proper
performance of the functions of the
Agency, including whether the
information shall have practical utility;
(b) the accuracy of the Agency’s
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18:17 Aug 18, 2023
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estimate of the burden of the proposed
collection of information; (c) ways to
enhance the quality, utility, and clarity
of the information on respondents,
including through the use of automated
collection techniques or other forms of
information technology; and (d) ways to
minimize the burden of the collection of
information on those who are to
respond, including through the use of
appropriate automated, electronic,
mechanical, or other technological
collection techniques or other forms of
information technology.
Dated: August 16, 2023.
Suzanne H. Plimpton,
Reports Clearance Officer, National Science
Foundation.
[FR Doc. 2023–17949 Filed 8–18–23; 8:45 am]
BILLING CODE 7555–01–P
56885
Week of August 28, 2023—Tentative
There are no meetings scheduled for
the week of August 28, 2023.
Week of September 4, 2023—Tentative
There are no meetings scheduled for
the week of September 4, 2023.
Week of September 11, 2023—Tentative
Tuesday, September 12, 2023
10:00 a.m. All Employees Meeting
(Public Meeting) (Contact: Anthony
de Jesus: 301–287–9219; Adrienne
Brown: 301–415–3764)
Additional Information: The meeting
will be held in the Two White Flint
North auditorium, 11555 Rockville Pike,
Rockville, Maryland. The public is
invited to attend the Commission’s
meeting live by webcast at the Web
address—https://video.nrc.gov/.
Thursday, September 14, 2023
NUCLEAR REGULATORY
COMMISSION
10:00 a.m. Briefing on NRC
International Activities (Closed—
Ex. 1 & 9)
[NRC–2023–0001]
Week of September 18, 2023—Tentative
Sunshine Act Meetings
Weeks of August 21, 28,
September 4, 11, 18, 25, 2023. The
schedule for Commission meetings is
subject to change on short notice. The
NRC Commission Meeting Schedule can
be found on the internet at: https://
www.nrc.gov/public-involve/publicmeetings/schedule.html.
PLACE: The NRC provides reasonable
accommodation to individuals with
disabilities where appropriate. If you
need a reasonable accommodation to
participate in these public meetings or
need this meeting notice or the
transcript or other information from the
public meetings in another format (e.g.,
braille, large print), please notify Anne
Silk, NRC Disability Program Specialist,
at 301–287–0745, by videophone at
240–428–3217, or by email at
Anne.Silk@nrc.gov. Determinations on
requests for reasonable accommodation
will be made on a case-by-case basis.
STATUS: Public and closed.
Members of the public may request to
receive the information in these notices
electronically. If you would like to be
added to the distribution, please contact
the Nuclear Regulatory Commission,
Office of the Secretary, Washington, DC
20555, at 301–415–1969, or by email at
Wendy.Moore@nrc.gov.
MATTERS TO BE CONSIDERED:
TIME AND DATE:
Week of August 21, 2023
There are no meetings scheduled for
the week of August 21, 2023.
PO 00000
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There are no meetings scheduled for
the week of September 18, 2023.
Week of September 25, 2023—Tentative
There are no meetings scheduled for
the week of September 25, 2023.
CONTACT PERSON FOR MORE INFORMATION:
For more information or to verify the
status of meetings, contact Wesley Held
at 301–287–3591 or via email at
Wesley.Held@nrc.gov.
The NRC is holding the meetings
under the authority of the Government
in the Sunshine Act, 5 U.S.C. 552b.
Dated: August 16, 2023.
For the Nuclear Regulatory Commission.
Wesley W. Held,
Policy Coordinator, Office of the Secretary.
[FR Doc. 2023–17988 Filed 8–17–23; 11:15 am]
BILLING CODE 7590–01–P
NUCLEAR REGULATORY
COMMISSION
[NRC–2023–0140]
Level 3 Probabilistic Risk Assessment
Project Documentation (Volume 4)
Nuclear Regulatory
Commission.
ACTION: Draft report; request for
comment.
AGENCY:
The U.S. Nuclear Regulatory
Commission (NRC) is issuing for public
comment a draft report on the Level 3
Probabilistic Risk Assessment (PRA)
project; specifically, ‘‘Volume 4:
SUMMARY:
E:\FR\FM\21AUN1.SGM
21AUN1
56886
Federal Register / Vol. 88, No. 160 / Monday, August 21, 2023 / Notices
Overview of Reactor, At-Power, Level 1,
2, and 3 PRAs for Internal Fires, Seismic
Events, and High Winds.’’
DATES: Submit comments by October 20,
2023. 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 on or 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–2023–0140. Address
questions about Docket IDs in
Regulations.gov to Stacy Schumann;
telephone: 301–415–0624; email:
Stacy.Schumann@nrc.gov. For technical
questions, contact the individual 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:
Alan Kuritzky, Office of Nuclear
Regulatory Research, U.S. Nuclear
Regulatory Commission, Washington,
DC 20555–0001, telephone: 301–415–
1552, email: Alan.Kuritzky@nrc.gov.
SUPPLEMENTARY INFORMATION:
A. Obtaining Information
B. Submitting Comments
The NRC encourages electronic
comment submission through the
Federal rulemaking website (https://
www.regulations.gov). Please include
Docket ID NRC–2023–0140 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.
Please refer to Docket ID NRC–2023–
0140 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–2023–0140.
• 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
II. Discussion
As directed in SRM–SECY–11–0089,
‘‘Options for Proceeding with Future
Level 3 Probabilistic Risk Assessment
(PRA) Activities,’’ the staff is
conducting a full-scope multi-unit site
Level 3 PRA (Level 3 PRA project) that
addresses all internal and external
hazards; all plant operating modes; and
all reactor units, spent fuel pools, and
dry cask storage. The reference site for
this study contains two four-loop
Westinghouse pressurized water
reactors with large dry containments.
The objectives of the Level 3 PRA
project are to (1) develop a Level 3 PRA,
generally based on current state-ofpractice methods, tools, and data, that
(a) reflects technical advances since the
last NRC-sponsored Level 3 PRAs
I. Obtaining Information and
Submitting Comments
ddrumheller on DSK120RN23PROD with NOTICES1
301–415–4737, or by email to
PDR.Resource@nrc.gov. For the
convenience of the reader, instructions
about obtaining materials referenced in
this document are provided in the
‘‘Availability of Documents’’ section.
• NRC’s PDR: The PDR, where you
may examine and order copies of
publicly available documents, is open
by appointment. To make an
appointment to visit the PDR, please
send an email to PDR.Resource@nrc.gov
or call 1–800–397–4209 or 301–415–
4737, between 8 a.m. and 4 p.m. eastern
time (ET), Monday through Friday,
except Federal holidays.
VerDate Sep<11>2014
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Fmt 4703
Sfmt 4703
(NUREG–1150), which were completed
over 30 years ago, and (b) addresses
scope considerations that were not
previously considered (e.g., low-power
and shutdown risk, multi-unit risk,
other radiological sources); (2) extract
new insights to enhance regulatory
decision making and to help focus
limited NRC resources on issues most
directly related to the agency’s mission
to protect public health and safety; (3)
enhance PRA staff capability and
expertise and improve documentation
practices to make PRA information more
accessible, retrievable, and
understandable; and (4) demonstrate
technical feasibility and evaluate the
realistic cost of developing new Level 3
PRAs.
The work performed under this
project is being documented as a multivolume report. This second batch of
Level 3 PRA project reports describes
the analyses and results for the reactor,
at-power, Level 1, 2, and 3 PRAs for
internal fires, seismic events, and high
winds (Volume 4). Each set of Level 3
PRA project reports covering the Level
1, 2, and 3 PRAs for a specific site
radiological source, plant operating
state, and hazard group (or groups) is
accompanied by an overview report.
The overview reports summarize the
results and insights from all three PRA
levels.
The Level 3 PRA project analyses
reflect the reference plant as it was
designed and operated as of 2012. To
provide results and insights better
aligned with the current design and
operation of the reference plant, the
overview reports also provide a
reevaluation of the plant risk based on
a set of new plant equipment and PRA
model assumptions and compare the
results of the reevaluation to the original
study results. This reevaluation reflects
the current reactor coolant pump
shutdown seal design at the reference
plant, as well as the potential impact of
FLEX strategies, both of which reduce
the risk to the public.
As documented in Section 2 of the
Volume 4 overview report, the results of
the original Level 3 PRA project
analyses and the reevaluation both show
that, when considering all hazards
combined for the reactor at power, the
combination of this plant design and
site location has substantial margin to
the quantitative health objectives related
to the NRC’s safety goal policy, though
the margins are noticeably less for the
surrogate risk metrics of core damage
frequency and large, early release
frequency. Even though these margins
can vary for other plants due to
variations in their design and siting, the
estimates derived for the reference
E:\FR\FM\21AUN1.SGM
21AUN1
Federal Register / Vol. 88, No. 160 / Monday, August 21, 2023 / Notices
plant, when adjusted for siting and
design variations, would provide useful
qualitative risk insights for other U.S.
operating plants.
III. Availability of Documents
The documents identified in the
following table are available to
interested persons through ADAMS, as
indicated.
ADAMS accession
No.
Document description
SRM–SECY–11–0089, ‘‘Options for Proceeding with Future Level 3 Probabilistic Risk Assessment (PRA) Activities’’ ............
Level 3 PRA Project, Volume 4: Overview of Reactor, At-Power, Level 1, 2, and 3 PRAs for Internal Fires, Seismic Events,
and High Winds; Draft Report for Comment .............................................................................................................................
Level 3 PRA Project, Volume 4a: Reactor, At-Power, Level 1 PRA for Internal Fires ................................................................
Level 3 PRA Project, Volume 4b: Reactor, At-Power, Level 1 PRA for Seismic Events .............................................................
Level 3 PRA Project, Volume 4c: Reactor, At-Power, Level 1 PRA High Winds and Other Hazards .........................................
Level 3 PRA Project, Volume 4d: Reactor, At-Power, Level 2 PRA for Internal Fires, Seismic Events, and High Winds .........
Level 3 PRA Project, Volume 4e: Reactor, At-Power, Level 3 PRA for Internal Fires, Seismic Events, and High Winds .........
Dated: August 9, 2023.
For the Nuclear Regulatory Commission.
Jonathan E. Evans,
Chief, Probability Risk Assessment Branch,
Division of Risk Analysis, Office of Nuclear
Regulatory Research.
I. Introduction
[FR Doc. 2023–17401 Filed 8–18–23; 8:45 am]
BILLING CODE 7590–01–P
POSTAL REGULATORY COMMISSION
[Docket Nos. MC2023–222 and R2023–4;
Order No. 6619]
Postal Regulatory Commission.
ACTION: Notice.
AGENCY:
The Commission is
recognizing a recent Postal Service filing
requesting the addition of a negotiated
service agreement with Publisher’s
Clearing House to the Market Dominant
product list. This notice informs the
public of the filing, invites public
comment, and takes other
administrative steps.
DATES: Comments are due: September
11, 2023.
ADDRESSES: Submit comments
electronically via the Commission’s
Filing Online system at https://
www.prc.gov. Those who cannot submit
comments electronically should contact
the person identified in the FOR FURTHER
INFORMATION CONTACT section by
telephone for advice on filing
alternatives.
SUMMARY:
ddrumheller on DSK120RN23PROD with NOTICES1
FOR FURTHER INFORMATION CONTACT:
David A. Trissell, General Counsel, at
202–789–6820.
SUPPLEMENTARY INFORMATION:
On August 11, 2023, the Postal
Service filed a request to add a
negotiated service agreement (NSA)
with Publisher’s Clearing House (PCH)
to the Market Dominant product list.1 If
favorably reviewed by the Commission,
the intended effective date will be in
November or December 2023. Request at
1. The Request, which was filed
pursuant to 39 U.S.C. 3622 and 3642 as
well as 39 CFR 3040 subparts B and G,
triggers a notice-and-comment
proceeding.
II. Overview of the Postal Service’s
Filing
New Postal Products
Contents of filing. The Postal Service’s
filing consists of its Request, six
attachments, and one set of financial
workpapers:
• Attachment A—a copy of
Governors’ Resolution No. 23–5,
establishing price and classification
changes for Market Dominant products
to implement a negotiated service
agreement with PCH, which the Postal
Service asserts conforms with 39 CFR
3040.131(b);
• Attachment B—a copy of the instant
contract, which the Postal Service
asserts conforms with 39 CFR
3040.221(b);
• Attachment C—proposed changes
to the Mail Classification Schedule
(MCS), which the Postal Service asserts
conforms with 39 CFR 3040.131(f);
• Attachment D—a proposed data
collection plan, which the Postal
Service asserts conforms with 39 CFR
3040.222;
• Attachment E—a statement of
supporting justification, which the
Postal Service asserts conforms with 39
CFR 3040.132 and 39 CFR 3040.221(f)–
(j);
Table of Contents
I. Introduction
II. Overview of the Postal Service’s Filing
III. Initial Administrative Actions
IV. Ordering Paragraphs
VerDate Sep<11>2014
18:17 Aug 18, 2023
Jkt 259001
1 USPS Notice of Filing of Contract and
Supporting Data and Request to Add Publisher’s
Clearing House Negotiated Service Agreement to
the Market-Dominant Product List, with Portions
Filed Under Seal, August 11, 2023 (Request).
PO 00000
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56887
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ML112640419
ML23194A015
ML23194A016
ML23194A017
ML23194A012
ML23194A013
ML23194A014
• Attachment F—an application for
non-public treatment of ‘‘certain data
which reflect commercially sensitive
aspects of Publisher’s Clearing House’s
business model, response rates, and
strategy[,]’’ (id. Attachment F at 1),
appearing in the Request and financial
analysis, which the Postal Service
asserts conforms with 39 CFR part 3011;
and
• Supporting Financial Analysis—an
Excel file containing a financial
analysis, which the Postal Service
asserts conforms with 39 CFR
3040.221(f) and demonstrates that the
PCH NSA will improve the net financial
position of the Postal Service.
Request at 2–3, 9.
Background. The Postal Service
explains that in recent years the mailing
industry has seen steady year-over-year
decline in mail volumes. Id. at 3. To
compensate for industry shifts away
from direct mail, the Postal Service
states that it ‘‘has been looking to
strengthen its existing strategic
partnerships and build new ones when
opportunities arise.’’ Id. PCH ‘‘is a
prominent direct mail marketing
company that sends a variety of letter
mail to consumers related to
sweepstakes entries, marketing
materials, invoicing, and related
correspondence.’’ Id. The Postal Service
explains that ‘‘PCH typically interacts
with the Postal Service in a five-stage
mailing and shipping lifecycle, which
begins with promotional mailings and
ends with bill payments.’’ Id. at 3–4.
The Postal Service represents that
PCH has found that certain dormant
prospects (i.e., individuals not mailed to
in at least 3 months) ‘‘are no longer
profitable for PCH to send promotional
mail to, because the lifetime value of
these prospects falls below the cost of
mailing . . . .’’ Id. at 4. The Postal
Service asserts that an up-front discount
on an initial USPS Marketing Mail
promotional mailing would allow PCH
to inject reactivation volume into the
E:\FR\FM\21AUN1.SGM
21AUN1
]]>Agencies
[Federal Register Volume 88, Number 160 (Monday, August 21, 2023)]
[Notices]
[Pages 56885-56887]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-17401]
-----------------------------------------------------------------------
NUCLEAR REGULATORY COMMISSION
[NRC-2023-0140]
Level 3 Probabilistic Risk Assessment Project Documentation
(Volume 4)
AGENCY: Nuclear Regulatory Commission.
ACTION: Draft report; request for comment.
-----------------------------------------------------------------------
SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is issuing for
public comment a draft report on the Level 3 Probabilistic Risk
Assessment (PRA) project; specifically, ``Volume 4:
[[Page 56886]]
Overview of Reactor, At-Power, Level 1, 2, and 3 PRAs for Internal
Fires, Seismic Events, and High Winds.''
DATES: Submit comments by October 20, 2023. 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
on or 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-2023-0140. Address
questions about Docket IDs in Regulations.gov to Stacy Schumann;
telephone: 301-415-0624; email: [email protected]. For technical
questions, contact the individual 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: Alan Kuritzky, Office of Nuclear
Regulatory Research, U.S. Nuclear Regulatory Commission, Washington, DC
20555-0001, telephone: 301-415-1552, email: [email protected].
SUPPLEMENTARY INFORMATION:
I. Obtaining Information and Submitting Comments
A. Obtaining Information
Please refer to Docket ID NRC-2023-0140 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-2023-0140.
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]. For the convenience of the reader,
instructions about obtaining materials referenced in this document are
provided in the ``Availability of Documents'' section.
NRC's PDR: The PDR, where you may examine and order copies
of publicly available documents, is open by appointment. 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
a.m. and 4 p.m. eastern time (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-2023-0140 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. Discussion
As directed in SRM-SECY-11-0089, ``Options for Proceeding with
Future Level 3 Probabilistic Risk Assessment (PRA) Activities,'' the
staff is conducting a full-scope multi-unit site Level 3 PRA (Level 3
PRA project) that addresses all internal and external hazards; all
plant operating modes; and all reactor units, spent fuel pools, and dry
cask storage. The reference site for this study contains two four-loop
Westinghouse pressurized water reactors with large dry containments.
The objectives of the Level 3 PRA project are to (1) develop a Level 3
PRA, generally based on current state-of-practice methods, tools, and
data, that (a) reflects technical advances since the last NRC-sponsored
Level 3 PRAs (NUREG-1150), which were completed over 30 years ago, and
(b) addresses scope considerations that were not previously considered
(e.g., low-power and shutdown risk, multi-unit risk, other radiological
sources); (2) extract new insights to enhance regulatory decision
making and to help focus limited NRC resources on issues most directly
related to the agency's mission to protect public health and safety;
(3) enhance PRA staff capability and expertise and improve
documentation practices to make PRA information more accessible,
retrievable, and understandable; and (4) demonstrate technical
feasibility and evaluate the realistic cost of developing new Level 3
PRAs.
The work performed under this project is being documented as a
multi-volume report. This second batch of Level 3 PRA project reports
describes the analyses and results for the reactor, at-power, Level 1,
2, and 3 PRAs for internal fires, seismic events, and high winds
(Volume 4). Each set of Level 3 PRA project reports covering the Level
1, 2, and 3 PRAs for a specific site radiological source, plant
operating state, and hazard group (or groups) is accompanied by an
overview report. The overview reports summarize the results and
insights from all three PRA levels.
The Level 3 PRA project analyses reflect the reference plant as it
was designed and operated as of 2012. To provide results and insights
better aligned with the current design and operation of the reference
plant, the overview reports also provide a reevaluation of the plant
risk based on a set of new plant equipment and PRA model assumptions
and compare the results of the reevaluation to the original study
results. This reevaluation reflects the current reactor coolant pump
shutdown seal design at the reference plant, as well as the potential
impact of FLEX strategies, both of which reduce the risk to the public.
As documented in Section 2 of the Volume 4 overview report, the
results of the original Level 3 PRA project analyses and the
reevaluation both show that, when considering all hazards combined for
the reactor at power, the combination of this plant design and site
location has substantial margin to the quantitative health objectives
related to the NRC's safety goal policy, though the margins are
noticeably less for the surrogate risk metrics of core damage frequency
and large, early release frequency. Even though these margins can vary
for other plants due to variations in their design and siting, the
estimates derived for the reference
[[Page 56887]]
plant, when adjusted for siting and design variations, would provide
useful qualitative risk insights for other U.S. operating plants.
III. Availability of Documents
The documents identified in the following table are available to
interested persons through ADAMS, as indicated.
------------------------------------------------------------------------
ADAMS accession
Document description No.
------------------------------------------------------------------------
SRM-SECY-11-0089, ``Options for Proceeding with ML112640419
Future Level 3 Probabilistic Risk Assessment (PRA)
Activities''........................................
Level 3 PRA Project, Volume 4: Overview of Reactor, ML23194A015
At-Power, Level 1, 2, and 3 PRAs for Internal Fires,
Seismic Events, and High Winds; Draft Report for
Comment.............................................
Level 3 PRA Project, Volume 4a: Reactor, At-Power, ML23194A016
Level 1 PRA for Internal Fires......................
Level 3 PRA Project, Volume 4b: Reactor, At-Power, ML23194A017
Level 1 PRA for Seismic Events......................
Level 3 PRA Project, Volume 4c: Reactor, At-Power, ML23194A012
Level 1 PRA High Winds and Other Hazards............
Level 3 PRA Project, Volume 4d: Reactor, At-Power, ML23194A013
Level 2 PRA for Internal Fires, Seismic Events, and
High Winds..........................................
Level 3 PRA Project, Volume 4e: Reactor, At-Power, ML23194A014
Level 3 PRA for Internal Fires, Seismic Events, and
High Winds..........................................
------------------------------------------------------------------------
Dated: August 9, 2023.
For the Nuclear Regulatory Commission.
Jonathan E. Evans,
Chief, Probability Risk Assessment Branch, Division of Risk Analysis,
Office of Nuclear Regulatory Research.
[FR Doc. 2023-17401 Filed 8-18-23; 8:45 am]
BILLING CODE 7590-01-P
