``Guidance on the Treatment of Uncertainties Associated with PRAs In Risk-Informed Decision Making, Draft Report for Comment'', 6746-6747 [E8-2082]

Download as PDF 6746 Federal Register / Vol. 73, No. 24 / Tuesday, February 5, 2008 / Notices a successor employer, they must transfer the records to NIOSH. II. Special Issues for Comment OSHA has a particular interest in comments on the following issues: • Whether the proposed information collection requirements are necessary for the proper performance of the Agency’s functions, including whether the information is useful; • The accuracy of OSHA’s estimate of the burden (time and costs) of the information collection requirements, including the validity of the methodology and assumptions used; • The quality, utility, and clarity of the information collected; and • Ways to minimize the burden on employers who must comply; for example, by using automated or other technological information collection and transmission techniques. III. Proposed Actions OSHA is requesting that OMB extend its approval of the information collection requirements contained in the Standard on Commercial Diving Operations (29 CFR part 1910, subpart T). The Agency is requesting to retain its current burden hour total of 205,397 associated with this Subpart; however, it is adding a cost of $2,765 for employers to transfer records to the National Institute for Occupational Safety and Health. The Agency will summarize the comments submitted in response to this notice and will include this summary in the request to OMB. Type of Review: Extension of a currently approved collection. Title: Standard on Commercial Diving Operations (29 CFR part 1910, subpart T). OMB Number: 1218–0069. Affected Public: Business or other forprofits. Number of Respondents: 3,000. Frequency: On occasion; annually. Average Time per Response: Varies from 3 minutes (.05 hour) to replace the safe practices manual to 1 hour to develop a new manual. Estimated Total Burden Hours: 205,397. Estimated Cost (Operation and Maintenance): $2,765. rmajette on PROD1PC64 with NOTICES IV. Public Participation—Submission of Comments on this Notice and Internet Access to Comments and Submissions You may submit comments in response to this document as follows: (1) Electronically at https:// www.regulations.gov, which is the Federal eRulemaking Portal; (2) by facsimile (Fax); or (3) by hard copy. All comments, attachments, and other VerDate Aug<31>2005 15:34 Feb 04, 2008 Jkt 214001 material must identify the Agency name and the OSHA docket number for the ICR (Docket No. OSHA–2007–0087). You may supplement electronic submissions by uploading document files electronically. If you wish to mail additional materials in reference to an electronic or facsimile submission, you must submit them to the OSHA Docket Office (see the section of this notice titled ADDRESSES). The additional materials must clearly identify your electronic comments by your name, date, and the docket number so the Agency can attach them to your comments. Because of security procedures, the use of regular mail may cause a significant delay in the receipt of comments. For information about security procedures concerning the delivery of materials by hand, express delivery, messenger, or courier service, please contact the OSHA Docket Office at (202) 693–2350 (TTY (877) 889– 5627). Comments and submissions are posted without change at https:// www.regulations.gov. Therefore, OSHA cautions commenters about submitting personal information such as social security numbers and date of birth. Although all submissions are listed in the https://www.regulations.gov index, some information (e.g., copyrighted material) is not publicly available to read or download through this website. All submissions, including copyrighted material, are available for inspection and copying at the OSHA Docket Office. Information on using the https:// www.regulations.gov website to submit comments and access the docket is available at the website’s ‘‘User Tips’’ link. Contact the OSHA Docket Office for information about materials not available through the website, and for assistance in using the Internet to locate docket submissions. V. Authority and Signature Edwin G. Foulke, Jr., Assistant Secretary of Labor for Occupational Safety and Health, directed the preparation of this notice. The authority for this notice is the Paperwork Reduction Act of 1995 (44 U.S.C. 3506 et seq.) and Secretary of Labor’s Order No. 5–2007 (72 FR 31159). Signed at Washington, DC, on January 30, 2008. Edwin G. Foulke, Jr., Assistant Secretary of Labor for Occupational Safety and Health. [FR Doc. E8–2061 Filed 2–4–08; 8:45 am] BILLING CODE 4510–26–P PO 00000 Frm 00057 Fmt 4703 Sfmt 4703 NUCLEAR REGULATORY COMMISSION [NUREG–1855] ‘‘Guidance on the Treatment of Uncertainties Associated with PRAs In Risk-Informed Decision Making, Draft Report for Comment’’ Nuclear Regulatory Commission. ACTION: Notice of availability of NUREG–1855, ‘‘Guidance on the Treatment of Uncertainties Associated with PRAs in Risk-Informed Decision Making, Draft Report for Comment,’’ and request for public comment. AGENCY: SUMMARY: The Nuclear Regulatory Commission (NRC) is announcing the availability of and is seeking comments on NUREG–1855, ‘‘Guidance on the Treatment of Uncertainties Associated with PRAs in Risk-Informed Decision Making, Draft Report for Comment.’’ DATES: Comments on this document should be submitted by March 28, 2008. Comments received after that date will be considered to the extent practical. To ensure efficient and complete comment resolution, comments should include references to the section, page, and line numbers of the document to which the comment applies, if possible. ADDRESSES: Members of the public are invited and encouraged to submit written comments to Michael Lesar, Chief, Rulemaking, Directives, and Editing Branch, Office of Administration, Mail Stop T6–D59, U.S. Nuclear Regulatory Commission, Washington, DC 20555–0001. Handdeliver comments attention to Michael Lesar, 11545 Rockville Pike, Rockville, MD, between 7:30 a.m. and 4:15 p.m. on Federal workdays. Comments may also be sent electronically to NRCREP@nrc.gov. This document, NUREG–1855, is available at the Agencywide Documents Access and Management System (ADAMS) Public Electronic Reading Room on the Internet at the NRC Web site at https://www.nrc.gov/reading-rm/ adams.html under Accession No. ML072990412 on the NRC Web site https://www.nrc.gov/reading-rm/doccollections/nuregs/docs4comment.html; and at the NRC Public Document Room, 11555 Rockville Pike, Rockville, MD. The PDR’s mailing address is USNRC PDR, Washington, DC 20555; telephone (301) 415–4737 or (800) 397–4205; fax (301) 415–3548; e-mail PDR@NRC.GOV. FOR FURTHER INFORMATION, CONTACT: Mary Drouin, Division of Risk Assessment, Office of Nuclear E:\FR\FM\05FEN1.SGM 05FEN1 Federal Register / Vol. 73, No. 24 / Tuesday, February 5, 2008 / Notices rmajette on PROD1PC64 with NOTICES Regulatory Research, telephone (301) 415–6675, e-mail mxd@nrc.gov. SUPPLEMENTARY INFORMATION: NUREG–1855, ‘‘Guidance on the Treatment of Uncertainties Associated With PRAs in Risk-Informed Decision Making, Draft Report for Comment.’’ December 2007 This NUREG provides guidance on how to treat uncertainties associated with probabilistic risk assessment (PRA) in risk-informed decision making. The objectives of this guidance include fostering an understanding of (1) the uncertainties associated with PRA, (2) the impact of the uncertainties on the results of the PRA, and (3) the uncertainties in the context of the decision making. The guidance in this document focuses on the use of PRA insights and results and ways to address the associated uncertainties. Consequently, the scope of the guidance contained in this report is limited to addressing the uncertainties associated with the use of the results of risk models. In implementing risk-informed decision making, the U.S. Nuclear Regulatory Commission expects that appropriate consideration of uncertainty will be given in analyses and interpretation of findings. Such consideration should include using a program of monitoring, feedback, and corrective action to address significant uncertainties. To meet this objective, it is necessary to understand the role that PRA results play in the context of the decision process. Defining the context includes providing an overview of the risk-informed decision making process itself. With the context defined, the characteristics of a risk model and, in particular, a PRA need to be understood. This understanding includes a recognition of the different forms of uncertainty which include aleatory and epistemic. A PRA, as a probabilistic model already characterizes aleatory uncertainty. The focus of this document is epistemic uncertainty. Therefore, guidance is given on identifying and describing the different types of sources of epistemic uncertainty including the different ways that they are treated. The different types of epistemic uncertainty include parameter, model, and completeness uncertainties. The final part of the guidance includes addressing the uncertainty in PRA results in the context of riskinformed decision making and, in particular, the interpretation of the results of the uncertainty analysis when comparing PRA results with the acceptance criteria established for a VerDate Aug<31>2005 15:34 Feb 04, 2008 Jkt 214001 specified application. In addition, guidance is provided for addressing the other elements contributing to completeness uncertainty in riskinformed decision making (e.g., unknown phenomena that have not been recognized or factors that have been identified but for which there is no agreed on method for addressing them in PRAs). The Electric Power Research Institute (EPRI), in parallel with the NRC, has been developing guidance documents on the treatment of uncertainties. The activities of the NRC and EPRI are meant to be complementary. The NRC is seeking public comment in order to receive feedback from the widest range of interested parties and to ensure that all information relevant to developing this document is available to the NRC staff. This document is issued for comment only and is not intended for interim use. The NRC will review public comments received on the document, incorporate suggested changes as necessary, and issue the final NUREG–1855 for use. Dated at Rockville, Maryland, this 18th day of January, 2008. For the U.S. Nuclear Regulatory Commission. Christiana H. Lui, Director, Division of Risk Analysis, Office of Nuclear Regulatory Research. [FR Doc. E8–2082 Filed 2–4–08; 8:45 am] BILLING CODE 7590–01–P NUCLEAR REGULATORY COMMISSION AGENCY HOLDING THE MEETINGS: Nuclear Regulatory Commission. DATE: Weeks of February 4, 11, 18, 25, March 3, 10, 2008 PLACE: Commissioners’ Conference Room, 11555 Rockville Pike, Rockville, Maryland. STATUS: Public and Closed. MATTERS TO BE CONSIDERED: Week of February 4, 2008 Thursday, February 7, 2008 12:55 p.m. Affirmation Session (Public Meeting) a. Final Rule—10 CFR 2.311 ‘‘Interlocutory Review of Rulings on Requests for Hearings/Petitions to Intervene, Selection of Hearing Procedures, and Requests by Potential Parties for Access to SUNSI and Safeguards Information’’ (RIN 3150–A108). b. Final Rule—Regulatory Improvements to the Nuclear Frm 00058 Fmt 4703 Sfmt 4703 Materials Management and Safeguards System (RIN 3150– AH85). Week of February 11, 2008—Tentative Monday, February 11, 2008 12:55 p.m. Affirmation Session (Public Meeting) (Tentative) a. Final Rule—10 CFR Part 73 ‘‘Safeguards Information Protection Requirements’’ (RIN 3150–AH57) (Tentative). 1 p.m. Discussion of Security Issues (Closed—Ex. 1). Week of February 18, 2008—Tentative Tuesday, February 19, 2008 10:30 a.m. Meeting with the National Academies Radiation Source Use and Replacement Study Committee (Closed—Ex. 1). Wednesday, February 20, 2008 9:30 a.m. Periodic Meeting on New Reactor Issues, Part 1 (Public Meeting) (Contact: Donna Williams, 301– 415–1322). 1:30 p.m. Periodic Meeting on New Reactor Issues, Part 2 (Public Meeting) (Contact: Donna Williams, 301– 415–1322). This meeting, parts 1 and 2, will be webcast live at the Web address— https://www.nrc.gov. Week of February 25, 2008—Tentative Sunshine Federal Register Notice PO 00000 6747 There are no meetings scheduled for the Week of February 25, 2008. Week of March 3, 2008—Tentative There are no meetings scheduled for the Week of March 3, 2008. Week of March 10, 2008—Tentative There are no meetings scheduled for the Week of March 10, 2008. * * * * * *The schedule for Commission meetings is subject to change on short notice. To verify the status of meetings, call (recording)—(301) 415–1292. Contact person for more information: Michelle Schroll, (301) 415–1662. * * * * * The NRC Commission Meeting Schedule can be found on the Internet at: https://www.nrc.gov/about-nrc/policymaking/schedule.html. * * * * * The NRC provides reasonable accommodation to individuals with disabilities where appropriate. If you E:\FR\FM\05FEN1.SGM 05FEN1

Agencies

[Federal Register Volume 73, Number 24 (Tuesday, February 5, 2008)]
[Notices]
[Pages 6746-6747]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E8-2082]


=======================================================================
-----------------------------------------------------------------------

NUCLEAR REGULATORY COMMISSION

[NUREG-1855]


``Guidance on the Treatment of Uncertainties Associated with PRAs 
In Risk-Informed Decision Making, Draft Report for Comment''

AGENCY: Nuclear Regulatory Commission.

ACTION: Notice of availability of NUREG-1855, ``Guidance on the 
Treatment of Uncertainties Associated with PRAs in Risk-Informed 
Decision Making, Draft Report for Comment,'' and request for public 
comment.

-----------------------------------------------------------------------

SUMMARY: The Nuclear Regulatory Commission (NRC) is announcing the 
availability of and is seeking comments on NUREG-1855, ``Guidance on 
the Treatment of Uncertainties Associated with PRAs in Risk-Informed 
Decision Making, Draft Report for Comment.''

DATES: Comments on this document should be submitted by March 28, 2008. 
Comments received after that date will be considered to the extent 
practical. To ensure efficient and complete comment resolution, 
comments should include references to the section, page, and line 
numbers of the document to which the comment applies, if possible.

ADDRESSES: Members of the public are invited and encouraged to submit 
written comments to Michael Lesar, Chief, Rulemaking, Directives, and 
Editing Branch, Office of Administration, Mail Stop T6-D59, U.S. 
Nuclear Regulatory Commission, Washington, DC 20555-0001. Hand-deliver 
comments attention to Michael Lesar, 11545 Rockville Pike, Rockville, 
MD, between 7:30 a.m. and 4:15 p.m. on Federal workdays. Comments may 
also be sent electronically to NRCREP@nrc.gov.
    This document, NUREG-1855, is available at the Agencywide Documents 
Access and Management System (ADAMS) Public Electronic Reading Room on 
the Internet at the NRC Web site at https://www.nrc.gov/reading-rm/
adams.html under Accession No. ML072990412 on the NRC Web site https://
www.nrc.gov/reading-rm/doc-collections/nuregs/docs4comment.html; and at 
the NRC Public Document Room, 11555 Rockville Pike, Rockville, MD. The 
PDR's mailing address is USNRC PDR, Washington, DC 20555; telephone 
(301) 415-4737 or (800) 397-4205; fax (301) 415-3548; e-mail 
PDR@NRC.GOV.

FOR FURTHER INFORMATION, CONTACT: Mary Drouin, Division of Risk 
Assessment, Office of Nuclear

[[Page 6747]]

Regulatory Research, telephone (301) 415-6675, e-mail mxd@nrc.gov.

SUPPLEMENTARY INFORMATION: 

NUREG-1855, ``Guidance on the Treatment of Uncertainties Associated 
With PRAs in Risk-Informed Decision Making, Draft Report for Comment.'' 
December 2007

    This NUREG provides guidance on how to treat uncertainties 
associated with probabilistic risk assessment (PRA) in risk-informed 
decision making. The objectives of this guidance include fostering an 
understanding of (1) the uncertainties associated with PRA, (2) the 
impact of the uncertainties on the results of the PRA, and (3) the 
uncertainties in the context of the decision making. The guidance in 
this document focuses on the use of PRA insights and results and ways 
to address the associated uncertainties. Consequently, the scope of the 
guidance contained in this report is limited to addressing the 
uncertainties associated with the use of the results of risk models.
    In implementing risk-informed decision making, the U.S. Nuclear 
Regulatory Commission expects that appropriate consideration of 
uncertainty will be given in analyses and interpretation of findings. 
Such consideration should include using a program of monitoring, 
feedback, and corrective action to address significant uncertainties. 
To meet this objective, it is necessary to understand the role that PRA 
results play in the context of the decision process. Defining the 
context includes providing an overview of the risk-informed decision 
making process itself.
    With the context defined, the characteristics of a risk model and, 
in particular, a PRA need to be understood. This understanding includes 
a recognition of the different forms of uncertainty which include 
aleatory and epistemic. A PRA, as a probabilistic model already 
characterizes aleatory uncertainty. The focus of this document is 
epistemic uncertainty. Therefore, guidance is given on identifying and 
describing the different types of sources of epistemic uncertainty 
including the different ways that they are treated. The different types 
of epistemic uncertainty include parameter, model, and completeness 
uncertainties.
    The final part of the guidance includes addressing the uncertainty 
in PRA results in the context of risk-informed decision making and, in 
particular, the interpretation of the results of the uncertainty 
analysis when comparing PRA results with the acceptance criteria 
established for a specified application. In addition, guidance is 
provided for addressing the other elements contributing to completeness 
uncertainty in risk-informed decision making (e.g., unknown phenomena 
that have not been recognized or factors that have been identified but 
for which there is no agreed on method for addressing them in PRAs).
    The Electric Power Research Institute (EPRI), in parallel with the 
NRC, has been developing guidance documents on the treatment of 
uncertainties. The activities of the NRC and EPRI are meant to be 
complementary.
    The NRC is seeking public comment in order to receive feedback from 
the widest range of interested parties and to ensure that all 
information relevant to developing this document is available to the 
NRC staff. This document is issued for comment only and is not intended 
for interim use. The NRC will review public comments received on the 
document, incorporate suggested changes as necessary, and issue the 
final NUREG-1855 for use.

    Dated at Rockville, Maryland, this 18th day of January, 2008.

    For the U.S. Nuclear Regulatory Commission.
Christiana H. Lui,
Director, Division of Risk Analysis, Office of Nuclear Regulatory 
Research.
 [FR Doc. E8-2082 Filed 2-4-08; 8:45 am]
BILLING CODE 7590-01-P
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