Credibility Assessment Framework for Critical Boiling Transition Models, 11136-11137 [2019-05606]
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Federal Register / Vol. 84, No. 57 / Monday, March 25, 2019 / Notices
NUCLEAR REGULATORY
COMMISSION
[NRC–2019–0043]
Credibility Assessment Framework for
Critical Boiling Transition Models
Nuclear Regulatory
Commission.
ACTION: Draft NUREG; request for
comment.
AGENCY:
The U.S. Nuclear Regulatory
Commission (NRC) is issuing for public
comment a draft NUREG (U.S. Nuclear
Regulatory Commission technical report
designation), knowledge management
NUREG (NUREG/KM) -0013,
‘‘Credibility Assessment Framework for
Critical Boiling Transition Models.’’
This NUREG describes NRC past
practice and staff experience in
determining the credibility of critical
heat flux and critical power models and,
based on that experience, presents an
assessment framework that combines
aspects of goal structuring notation and
maturity assessment.
DATES: Submit comments by May 24,
2019. 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: Please refer to Docket ID
NRC–2019–0043 when contacting the
NRC about the availability of
information regarding this document.
You may submit comments by any of
the following methods:
• Federal Rulemaking Website: Go to
https://www.regulations.gov and search
for Docket ID NRC–2019–0043. Address
questions about NRC dockets IDs in
Regulations.gov to Jennifer Borges;
telephone: 301–287–9127; email:
Jennifer.Borges@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:
Joshua Kaizer, Office of Nuclear Reactor
Regulation, U.S. Nuclear Regulatory
Commission, Washington, DC 20555–
0001; telephone: 301–415–1532, email:
Joshua.Kaizer@nrc.gov.
SUMMARY:
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16:47 Mar 22, 2019
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SUPPLEMENTARY INFORMATION:
II. Discussion
I. Obtaining Information and
Submitting Comments
Critical boiling transition (CBT)
occurs when a flow regime that has a
higher heat transfer rate transitions to a
flow regime that has a significantly
lower heat transfer rate. Models that
predict a CBT are a necessary part of
reactor safety analysis because they are
used to determine plant safety limits.
Therefore, the review of CBT models
has been a focus of the NRC since its
inception in 1975.
Draft NUREG/KM–0013 describes
NRC practice and staff experience in
evaluating CBT models and organizes
that practice and staff experience in the
form of a credibility assessment
framework that combines aspects of goal
structure notation and maturity
assessment. The NRC has performed
many such assessments in the past and
has generated this framework based on
the experience of the current NRC staff
and previous reviews performed by the
staff as summarized in its evaluations.
This document includes a survey of the
important technical and regulatory
literature; a detailed technical
discussion of CBT models and their
application; and a framework for CBT
models that reflects NRC practice as a
whole, including the level of evidence
previously accepted to address the
various issues relevant to the evaluation
of CBT models. Accordingly, the NRC is
requesting comments on the NUREG–
0013/KM description of the NRC
practice and experience in evaluating
CBT models and the adequacy of the
assessment framework presented.
The framework presented in NUREG–
0013/KM is intended as a ‘‘textbook’’
reference for those interested in the
assessment of the credibility of CBT
models, particularly as applied to
reactor safety analysis. Nonetheless,
Draft NUREG–0013/KM is not guidance
to the NRC staff, applicants for NRC
licenses, or current NRC licensees, and,
if finalized, would not constitute
backfitting, as defined in title 10 of the
Code of Federal Regulations (10 CFR)
50.109 (the Backfit Rule), or otherwise
be inconsistent with the issue finality
provisions in 10 CFR part 52. In the
future, the NRC staff may decide to
reference NUREG–0013/KM in guidance
to the NRC staff or guidance to
applicants or licensees, i.e., through an
update to the Standard Review Plan or
new Interim Staff Guidance, or update
to a Regulatory Guide, respectively.
Should the NRC staff decide to do so,
the NRC staff will seek public comment
on the use of NUREG–0013/KM as
guidance and will assess any 10 CFR
50.109 backfitting and part 52 issue
A. Obtaining Information
Please refer to Docket ID NRC–2019–
0043 when contacting the NRC about
the availability of information for this
action. You may obtain publiclyavailable 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–2019–0043.
• NRC’s Agencywide Documents
Access and Management System
(ADAMS): You may obtain publicly
available documents online in the
ADAMS Public Document collection at
https://www.nrc.gov/reading-rm/
adams.html. To begin the search, select
‘‘Begin Web-based ADAMS Search.’’ For
problems with ADAMS, contact the
NRC’s Public Document Room (PDR)
reference staff at 1–800–397–4209, 301–
415–4737, or by email to pdr.resource@
nrc.gov. 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. Draft NUREG/KM–0013 is
available in ADAMS under Accession
No. ML19073A249.
• NRC’s PDR: You may examine and
purchase copies of public documents at
the NRC’s PDR, Room O1–F21, One
White Flint North, 11555 Rockville
Pike, Rockville, Maryland 20852.
B. Submitting Comments
Please include Docket ID NRC–2019–
0043 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.
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Federal Register / Vol. 84, No. 57 / Monday, March 25, 2019 / Notices
finality considerations arising from such
use.
Dated at Rockville, Maryland, this 20th day
of March 2019.
For the Nuclear Regulatory Commission.
Robert G. Lukes,
Chief, Nuclear Performance and Code Review,
Division of Safety Systems, Office of Nuclear
Reactor Regulation.
[FR Doc. 2019–05606 Filed 3–22–19; 8:45 am]
BILLING CODE 7590–01–P
NUCLEAR REGULATORY
COMMISSION
[NRC–2018–0106]
Information Collection: Form 790,
Classification Record
Nuclear Regulatory
Commission.
ACTION: Notice of submission to the
Office of Management and Budget;
request for comment.
AGENCY:
The U.S. Nuclear Regulatory
Commission (NRC) has recently
submitted a request for renewal of an
existing collection of information to the
Office of Management and Budget
(OMB) for review. The information
collection is entitled, ‘‘Form 790,
Classification Record.’’
DATES: Submit comments by April 24,
2019.
SUMMARY:
Submit comments directly
to the OMB reviewer at: OMB Office of
Information and Regulatory Affairs
(3150–0052), Attn: Desk Officer for the
Nuclear Regulatory Commission, 725
17th Street NW, Washington, DC 20503;
email: oira_submission@omb.eop.gov.
FOR FURTHER INFORMATION CONTACT:
David Cullison, NRC Clearance Officer,
U.S. Nuclear Regulatory Commission,
Washington, DC 20555–0001; telephone:
301–415–2084; email:
INFOCOLLECTS.Resource@nrc.gov.
SUPPLEMENTARY INFORMATION:
ADDRESSES:
I. Obtaining Information and
Submitting Comments
A. Obtaining Information
Please refer to Docket ID NRC–2018–
0106 when contacting the NRC about
the availability of information for this
action. You may obtain publiclyavailable 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–2018–0106. A copy
of the collection of information and
related instructions may be obtained
without charge by accessing Docket ID
NRC–2018–0106 on this website.
VerDate Sep<11>2014
16:47 Mar 22, 2019
Jkt 247001
• NRC’s Agencywide Documents
Access and Management System
(ADAMS): You may obtain publiclyavailable 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, contact the
NRC’s Public Document Room (PDR)
reference staff at 1–800–397–4209, 301–
415–4737, or by email to pdr.resource@
nrc.gov. A copy of the collection of
information and related instructions
may be obtained without charge by
accessing ADAMS Accession
ML19057A122. The supporting
statement is available in ADAMS under
Accession No. ML19057A037.
• NRC’s PDR: You may examine and
purchase copies of public documents at
the NRC’s PDR, Room O1–F21, One
White Flint North, 11555 Rockville
Pike, Rockville, Maryland 20852.
• NRC’s Clearance Officer: A copy of
the collection of information and related
instructions may be obtained without
charge by contacting the NRC’s
Clearance Officer, David Cullison,
Office of the Chief Information Officer,
U.S. Nuclear Regulatory Commission,
Washington, DC 20555–0001; telephone:
301–415–2084; email:
INFOCOLLECTS.Resource@NRC.GOV.
B. Submitting Comments
The NRC cautions you not to include
identifying or contact information in
comment submissions that you do not
want to be publicly disclosed in your
comment submission. All comment
submissions are posted at https://
www.regulations.gov and entered into
ADAMS. Comment submissions are not
routinely edited to remove identifying
or contact information.
If you are requesting or aggregating
comments from other persons for
submission to the OMB, 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 comment submissions are not
routinely edited to remove such
information before making the comment
submissions available to the public or
entering the comment into ADAMS.
II. Background
Under the provisions of the
Paperwork Reduction Act of 1995 (44
U.S.C. Chapter 35), the NRC recently
submitted a request for renewal of an
existing collection of information to
OMB for review entitled, ‘‘NRC Form
790, Classification Record.’’ The NRC
hereby informs potential respondents
PO 00000
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11137
that an agency may not conduct or
sponsor, and that a person is not
required to respond to, a collection of
information unless it displays a
currently valid OMB control number.
The NRC published a Federal
Register notice with a 60-day comment
period on this information collection on
November 14, 2018 (83 FR 56885).
1. The title of the information
collection: NRC Form 790,
‘‘Classification Record.’’
2. OMB approval number: 3150–0052.
3. Type of submission: Extension.
4. The form number, if applicable:
NRC Form 790.
5. How often the collection is required
or requested: On occasion. NRC Form
790 is required each time an authorized
classifier makes a classification
determination to classify, declassify, or
downgrade a document.
6. Who will be required or asked to
respond: NRC licensees, licensees’
contractors, and certificate holders who
classify and declassify NRC information.
7. The estimated number of annual
responses: 500.
8. The estimated number of annual
respondents: 2.
9. The estimated number of hours
needed annually to comply with the
information collection requirement or
request: 54 hours.
10. Abstract: Completion of the NRC
Form 790 is a mandatory requirement
for NRC licensees, licensees’
contractors, and certificate holders who
classify and declassify NRC information
in accordance with Executive Order
13526, ‘‘Classified National Security
Information,’’ the Atomic Energy Act,
and implementing directives. The NRC
uses the information on the form to
report statistics related to its security
classification program on an annual
basis to the Information Security
Oversight Office.
Dated at Rockville, Maryland, this 20th day
of March 2019.
For the Nuclear Regulatory Commission.
David C. Cullison,
NRC Clearance Officer, Office of the Chief
Information Officer.
[FR Doc. 2019–05604 Filed 3–22–19; 8:45 am]
BILLING CODE 7590–01–P
NUCLEAR REGULATORY
COMMISSION
663rd Meeting of the Advisory
Committee on Reactor Safeguards
(ACRS)
In accordance with the purposes of
Sections 29 and 182b of the Atomic
Energy Act (42 U.S.C. 2039, 2232b), the
Advisory Committee on Reactor
E:\FR\FM\25MRN1.SGM
25MRN1
Agencies
[Federal Register Volume 84, Number 57 (Monday, March 25, 2019)]
[Notices]
[Pages 11136-11137]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-05606]
[[Page 11136]]
=======================================================================
-----------------------------------------------------------------------
NUCLEAR REGULATORY COMMISSION
[NRC-2019-0043]
Credibility Assessment Framework for Critical Boiling Transition
Models
AGENCY: Nuclear Regulatory Commission.
ACTION: Draft NUREG; request for comment.
-----------------------------------------------------------------------
SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is issuing for
public comment a draft NUREG (U.S. Nuclear Regulatory Commission
technical report designation), knowledge management NUREG (NUREG/KM) -
0013, ``Credibility Assessment Framework for Critical Boiling
Transition Models.'' This NUREG describes NRC past practice and staff
experience in determining the credibility of critical heat flux and
critical power models and, based on that experience, presents an
assessment framework that combines aspects of goal structuring notation
and maturity assessment.
DATES: Submit comments by May 24, 2019. 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: Please refer to Docket ID NRC-2019-0043 when contacting the
NRC about the availability of information regarding this document. You
may submit comments by any of the following methods:
Federal Rulemaking Website: Go to https://www.regulations.gov and search for Docket ID NRC-2019-0043. Address
questions about NRC dockets IDs in Regulations.gov to Jennifer Borges;
telephone: 301-287-9127; email: Jennifer.Borges@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: Joshua Kaizer, Office of Nuclear
Reactor Regulation, U.S. Nuclear Regulatory Commission, Washington, DC
20555-0001; telephone: 301-415-1532, email: Joshua.Kaizer@nrc.gov.
SUPPLEMENTARY INFORMATION:
I. Obtaining Information and Submitting Comments
A. Obtaining Information
Please refer to Docket ID NRC-2019-0043 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-2019-0043.
NRC's Agencywide Documents Access and Management System
(ADAMS): You may obtain publicly available documents online in the
ADAMS Public Document collection at https://www.nrc.gov/reading-rm/adams.html. To begin the search, select ``Begin Web-based ADAMS
Search.'' For problems with ADAMS, contact the NRC's Public Document
Room (PDR) reference staff at 1-800-397-4209, 301-415-4737, or by email
to pdr.resource@nrc.gov. 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. Draft NUREG/KM-0013 is available
in ADAMS under Accession No. ML19073A249.
NRC's PDR: You may examine and purchase copies of public
documents at the NRC's PDR, Room O1-F21, One White Flint North, 11555
Rockville Pike, Rockville, Maryland 20852.
B. Submitting Comments
Please include Docket ID NRC-2019-0043 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
Critical boiling transition (CBT) occurs when a flow regime that
has a higher heat transfer rate transitions to a flow regime that has a
significantly lower heat transfer rate. Models that predict a CBT are a
necessary part of reactor safety analysis because they are used to
determine plant safety limits. Therefore, the review of CBT models has
been a focus of the NRC since its inception in 1975.
Draft NUREG/KM-0013 describes NRC practice and staff experience in
evaluating CBT models and organizes that practice and staff experience
in the form of a credibility assessment framework that combines aspects
of goal structure notation and maturity assessment. The NRC has
performed many such assessments in the past and has generated this
framework based on the experience of the current NRC staff and previous
reviews performed by the staff as summarized in its evaluations. This
document includes a survey of the important technical and regulatory
literature; a detailed technical discussion of CBT models and their
application; and a framework for CBT models that reflects NRC practice
as a whole, including the level of evidence previously accepted to
address the various issues relevant to the evaluation of CBT models.
Accordingly, the NRC is requesting comments on the NUREG-0013/KM
description of the NRC practice and experience in evaluating CBT models
and the adequacy of the assessment framework presented.
The framework presented in NUREG-0013/KM is intended as a
``textbook'' reference for those interested in the assessment of the
credibility of CBT models, particularly as applied to reactor safety
analysis. Nonetheless, Draft NUREG-0013/KM is not guidance to the NRC
staff, applicants for NRC licenses, or current NRC licensees, and, if
finalized, would not constitute backfitting, as defined in title 10 of
the Code of Federal Regulations (10 CFR) 50.109 (the Backfit Rule), or
otherwise be inconsistent with the issue finality provisions in 10 CFR
part 52. In the future, the NRC staff may decide to reference NUREG-
0013/KM in guidance to the NRC staff or guidance to applicants or
licensees, i.e., through an update to the Standard Review Plan or new
Interim Staff Guidance, or update to a Regulatory Guide, respectively.
Should the NRC staff decide to do so, the NRC staff will seek public
comment on the use of NUREG-0013/KM as guidance and will assess any 10
CFR 50.109 backfitting and part 52 issue
[[Page 11137]]
finality considerations arising from such use.
Dated at Rockville, Maryland, this 20th day of March 2019.
For the Nuclear Regulatory Commission.
Robert G. Lukes,
Chief, Nuclear Performance and Code Review, Division of Safety Systems,
Office of Nuclear Reactor Regulation.
[FR Doc. 2019-05606 Filed 3-22-19; 8:45 am]
BILLING CODE 7590-01-P