ML20024H830
| ML20024H830 | |
| Person / Time | |
|---|---|
| Issue date: | 06/17/1993 |
| From: | Correia R Office of Nuclear Reactor Regulation |
| To: | Zech G Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9308200252 | |
| Download: ML20024H830 (9) | |
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O June 17,1993 t
MEMORANDUM T0:
G. Zech, Chief Performance and Quality Evaluation Branch Division of Reactor Inspections and Licensee Performance Office of Nuclear Reactor Regulation FROM:
R. Correia, Chief Section B Performance and Quality Evaluation Branch Division of Reactor Inspections and Licensee Performance Office of Nuclear Reactor Regulation
SUBJECT:
PRESENTATION MATERIALS FOR THE 1993 ANNUAL ANS MEETING Attached for your information are the materials I will use during a presentation at the 1993 Annual Meeting of the American Nuclear Society (ANS) on June 21, 1993 in San Diego, California.
The presentation materials were developed using the narrative summary I wrote entitled " Maintenance of Current and future Reactors" which was reviewed and approved by Division management in January 1993. Copies of this presentation will be forwarded to central files and the PDR.
ORIGIIULL gig 7q:n pv R. Correia, Chief Section B Performance and Quality Evaluation Branch Division of Reactor Inspections and Licensee Performance Office of Nuclear Reactor Regulation
Enclosure:
As stated cc:
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i PRESENTATION TO The 1993 Annual Meeting of the American Nuclear Society
" MAINTENANCE OF CURRENT AND FUTURE REACTORS" i
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Performance and Quality Evaluation Branch i
'h o8 Division of Reactor Inspections bI and Licensee Performance Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission j
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Proper Maintenance e
Essential to plant safety e
Important for safety and non-safety equipment e
Ensures original design basis margins are maintained or not unacceptably degraded 1
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The Maintenance Rule (10 CFR 50.65) e Promulgated on July 10,1991, effective July 10,1996 e
Provision (a)(1) requires monitoring SSC performance against licensee established goals e
Provision (a)(3) of the rule requires assessment of total SSCs out of service against overallplant safety e
(a)(3) also requires evaluation and adjustment of PMs to appropriately balance SSC reliability and availability I
e Rule SOC suggests use of PRAs to:
Determine extent of monitoring SSCs depending on importance to plant risk Avoid placing plant in high risk configuration i
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- The Industry Guideline, NUMARC 93-01 Endorsed by NRC Regulatory Guide e
1.160 Adopted NRC philosophy of integrating e
risk insights into the maintenance process e
Describes methods using PRAs to determine risk-significant SSCs e
Recommends goals orperformance criteria based on reliability, availability, and other performance parameters used in the PRA e
Recommended corrective actions could include:
changing the assumptions used in the PRAs to reflect actualperformance, adjusting goals /perfom1ance criteria, e
modifying preventive maintenance activities Shda 4
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AL WR Reliability Assurance Program Spans complete lifecycle of plant o
Ensures that plant design, construction, e
and operations are consistent with reliability assumptions in design certification PRA Two part program: Design Reliability e
Assurance Program (D-RAP) and Operational Reliability Assurance Program (0-RAP) i h
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ALWR Reliability Assurance Program Design Reliability Assurance Program (D-RAP) e Applies to the design phase (NSSS vendor and COL applicant) e Identifies and prioritizes a list of risk-significant SSCs based on the design certification PRA and other sources e
Ensures design assumptions for equipment reliability and availability are realistic and achievable e
Provides input to the procurement i
process for obtaining equipment that meets or exceeds the design reliability assumptions e
Provides design assumptions to a COL applicant for consideration in the O-RAP l
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ALV/R Reliability Assurance Program Operational Reliability Assurance Program (0-RAP)
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Applies to the construction and operation e
phases of plant life
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Establishes th.e performance goals for e
risk-significant equipment based on input from the D-RAP (consistent with the i
requirements of 10 CFR 50.65)
Establishes the performance and e
condition monitoring requirements for maintaining the reliability of risk-significant SSCs e
Provides a feedback mechanism for j
periodically re-evaluating risk significance based on actual equipment and/or system performance i
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e Maintenance rule and ALWR RAP consistent in purpose and objective e
Both consider risk insights from PRAs e
Risk insights focus on important SSCs i
e ALWRs have advantage of using risk insights during design and procurement stages of plant life l
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