RIS 2002-14, Proposed Changes to the Safety System Unavailability Performance Indicators
| ML022740012 | |
| Person / Time | |
|---|---|
| Issue date: | 09/30/2002 |
| Revision: | 0 |
| From: | Beckner W D NRC/NRR/DRIP/RORP |
| To: | |
| Sanders S, NRR/DIPM, 415-2956 | |
| Shared Package | |
| ML022740008 | List: |
| References | |
| RIS-02-014, Suppl 1 | |
| Preceding documents: |
|
| Download: ML022740012 (5) | |
September 30, 2002
NRC REGULATORY ISSUE SUMMARY 2002-14, SUPPLEMENT 1PROPOSED CHANGES TO THE SAFETY SYSTEM UNAVAILABILITYPERFORMANCE INDICATORS
ADDRESSEES
All holders of operating licenses for nuclear power reactors, except those who havepermanently ceased operations and have certified that fuel has been permanently removed from the reactor vessel.
INTENT
The U. S. Nuclear Regulatory Commission (NRC) is issuing this supplement to RegulatoryIssue Summary (RIS) 2002-14 to provide to the addressees revised versions of the three attachments to the RIS.
BACKGROUND
Regulatory Issue Summary 2002-14 informed addressees that the NRC was starting a 6-monthpilot program on September 1, 2002, to evaluate changes to the safety system unavailability (SSU) performance indicators (PIs), and that the pilot program would be assessed midway through the test period to determine if more than six months were needed to obtain meaningful result The RIS and its three attachments provided guidance to participating addressees for submitting PI data to the NRC and on the program success criteri Addressee participation in the pilot program is voluntary and participants were asked to conformto the guidance in the RIS for the voluntary submission of PI dat
Addressees
were also informed that updated guidance would be provided in the form of revisions to the attachments to the RIS, namely, Attachment 1, an excerpt from Draft NEI 99-02, Rev. 0, "Regulatory Assessment Performance Indicator Guideline," Section 2.2, "Mitigating System Performance Index," and Attachment 2, Draft NEI 99-02, Rev. 0, Appendix F, " Methodologies For Computing the Unavailability Index, the Unreliability Index and Determining Performance Index Validity."
SUMMARY OF ISSUE
Since the issuance of RIS 2002-14 on August 28, 2002, Attachments 1 and 2 have beenupdated and Attachment 3 has been revise The revised attachments are attached to this RIS supplement.ML022740008 RIS 2002-14, Sup. 1
BACKFIT DISCUSSION
This RIS supplement requires no action or written respons Therefore, the staff did notperform a backfit analysis.
FEDERAL REGISTER NOTIFICATION
A notice of opportunity for public comment was not published in the Federal Register becausethis RIS supplement is informational.
PAPERWORK REDUCTION ACT STATEMENT
This RIS supplement does not request any information collections.If there are any questions about this matter, please contact one of the persons listed below./Original signed by: TReis/William D. Beckner, Program Director Operating Reactor Improvements program Division of Regulatory Improvement Programs Office of Nuclear Reactor RegulationTechnical contact:Serita Sanders, NRR 301-415-2956 E-mail: sxs5@nrc.gov
Attachments:
Draft NEI 99-02, Rev. 0, "Regulatory Assessment Performance Indicator Guideline," Section 2.2, "Mitigating System Performance Index" Draft NEI 99-02, Rev. 0, "Regulatory Assessment Performance Indicator Guideline," Appendix F, "Methodologies For Computing the Unavailability Index, the Unreliability Index, and Determining Performance Index Validity" 3.Mitigating System Performance Index Pilot Program Success Criteria 4.List of Recently Issued NRC Regulatory Issue Summaries RIS 2002-14, Sup. 1
BACKFIT DISCUSSION
This RIS supplement requires no action or written respons Therefore, the staff did notperform a backfit analysis.
FEDERAL REGISTER NOTIFICATION
A notice of opportunity for public comment was not published in the Federal Register becausethis RIS supplement is informational.
PAPERWORK REDUCTION ACT STATEMENT
This RIS supplement does not request any information collections.If there are any questions about this matter, please contact one of the persons listed below./Original signed by: TReis/William D. Beckner, Program Director Operating Reactor Improvements program Division of Regulatory Improvement Programs Office of Nuclear Reactor RegulationTechnical contact:Serita Sanders, NRR 301-415-2956 E-mail: sxs5@nrc.gov
Attachments:
Draft NEI 99-02, Rev. 0, "Regulatory Assessment Performance Indicator Guideline," Section 2.2, "Mitigating System Performance Index" Draft NEI 99-02, Rev. 0, "Regulatory Assessment Performance Indicator Guideline," Appendix F, "Methodologies For Computing the Unavailability Index, the Unreliability Index, and Determining Performance Index Validity" 3.Mitigating System Performance Index Pilot Program Success Criteria 4.List of Recently Issued NRC Regulatory Issue SummariesDISTRIBUTION:ADAMS RIS File DOCUMENT NAME: G:\RORP\OES\Shapaker\912-jws-d0214sRIS.wpd ADAMS ACCESSION NUMBER: Package ML022740008, ML022740012, ML022740072*See previous concurrence OFFICEOE:RORP:DRIPIIPB:DIPMSC:IIPB:DIPMBC:IIPM:DIPMNAMEJWShapaker*SSanders*MSatorious*CCarpenter*DATE09/ /200209/19/200209/26/200209/29/2002OFFICEOGCSC:RORP:DRIPPD:RORP:DRIPNAMEHJMcGurren*TReis*WDBeckner*DATE09/30/200209/30/200209/30/2002OFFICIAL RECORD COPY Attachment 3RIS 2002-14, Sup. 1 Mitigating System Performance Index Pilot ProgramSuccess CriteriaThe Mitigating System Performance Index (MSPI) success criteria listed below will be met ifthere is general agreement among internal and external stakeholders that the criteria have been me a.The occurrence of a single failure of an MSPI monitored component by itself, absent anyother failures or unavailabilities, should rarely exceed the green/white MSPI threshold as measured from the baseline valu The term "rare" is defined as minimizing theinconsistencies across plants, within plants, and within systems such that there is no undue burden on resources, and the objective of having consistent publicly displayed results can be achieve b.False positive and false negative rates can be established for the chosen statisticalmethod, and instances where the MSPI cannot meet the criteria are rar c.Instances where the results from the MSPI calculational methodology are not consistentwith the SPAR-3 models are rare and the differences are explainabl d.The MSPI pilot plant participants can identify and compile the risk significant functionsfor the monitored systems in a readily inspectable format and can compile a set of predetermined success criteria for those risk significant function e.The active components in the monitored systems are appropriate for inclusion in theMSPI and are a manageable number of components under the MSP f.By the end of the pilot, MSPI data can be accurately reported and quality checke g.By the end of the pilot program, inspection procedures and MSPI pilot guidelines aresufficiently detailed to minimize MSPI Questions and NRC feedback form h.MSPI Questions and NRC feedback do not reveal any unresolvable issue i.Data collection inconsistencies between the maintenance rule and the MSPI can bereconciled in order to eliminate or significantly reduce separate reportin j.Differences between the linear approximation models generated by licensee probabilistic risk assessments and those generated by the NRC SPAR-3 models can be reconcile k.The MSPI produces no new unintended consequences that cannot be resolved.
Upon the successful meeting of the success criteria, with a determination that the MSPI pilot isa valid and appropriate means of measuring risk for the monitored systems, the MSPI will suffice as the measure of assessment and not the significance determination process for single failures of the active components within the scope of the MSP Any significant problems will be resolved before full MSPI implementatio ______________________________________________________________________________________OL = Operating License CP = Construction PermitAttachment 4RIS 2002-14, Sup. 1 LIST OF RECENTLY ISSUEDNRC REGULATORY ISSUE SUMMARIES_____________________________________________________________________________________Regulatory Issue Date of Summary N Subject IssuanceIssued to_____________________________________________________________________________________2002-17Guidance on Performing MilitaryService Verification09/19/2002All holders of operating licensesfor nuclear power reactors.2002-16Current Incident Response Issues09/13/2002All holders of operating licensesfor nuclear power plants.2002-15NRC Approval of Commercial DataEncryption Systems for the Electronic Transmission of Safeguards Information08/28/2002All authorized recipients andholders of sensitive unclassified safeguards information (SGI).2002-14Proposed Changes to the SafetySystem Unavailability Performance Indicators08/28/2002All holders of operating licensesfor nuclear power reactors, except those who have permanently ceased operations and have certified that fuel has been permanently removed from the reactor vessel.2002-13Confirmation of EmploymentEligibility08/27/2002All holders of operating licensesfor nuclear power reactors.2002-12NRC Threat Advisory andProtective Measures SystemVariousVarious2002-11Requalification Program TestResults for Okonite Okolon Single- Conductor Bonded-Jacket Cable (Followup to Regulatory Issue Summary 2000-25)08/09/2002All holders operating licenses fornuclear power reactors, except those who have permanently ceased operations and have certified that fuel has been permanently removed from the reactor vessel.2002-10Revision of the Skin Dose Limit in10 CFR Part 2007/09/2002All U.S. Nuclear RegulatoryCommission material licensees.Note:NRC generic communications may be received in electronic format shortly after they areissued by subscribing to the NRC listserver as follows:To subscribe send an e-mail to <listproc@nrc.gov >, no subject, and the followingcommand in the message portion:subscribe gc-nrr firstname lastname