ML20236V421

Forwards SER Approving Topical Repts WCAP-14333P & WCAP-14334NP (Proprietary & non-propiretary, PRA of RPS & ESFAS Test Times & Completion Times

ML20236V421
Person / Time
Site:	Indian Point
Issue date:	07/13/1998
From:	Essig T NRC (Affiliation Not Assigned)
To:	Liberatori L CONSOLIDATED EDISON CO. OF NEW YORK, INC., WESTINGHOUSE OPERATING PLANTS OWNERS GROUP
Shared Package
ML20236V423	List: ML20236V421 ML20236V428
References
TAC-M92782, NUDOCS 9808030174
Download: ML20236V421 (3)

Text

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PUELIC DOCUMDri E00M Mr. Louis F. Liberatori Jr., Chairman Westinghouse Owners Group Consolidated Edison Co. of NY, Inc.

Indian Point Unit 2 Broadway and Bleakley Avenue Buchanan, NY 10511

SUBJECT:

REVIEW OF WESTINGHOUSE OWNERS GROUP TOPICAL REPORTS WCAP-14333P AND WCAP-14334NP, DATED MAY 1995, "PROBABILISTIC RISK ANALYSIS OF THE RPS AND ESFAS TEST TIMES AND COMPLETION TIMES" (TAC NO. M92782)

Dear Mr. Liberatori:

The NRC staff has completed its review of the subject topical reports prepared by Westinghouse Electric Corporation for the Westinghouse Owners Group. The enclosure provides the staff's safety evaluation report (SER) approving the topical reports. The j

topical reports describe the Westinghouse Owners Group's program, which was completed i

as an industry effort to demonstrate the acceptability of the increase in the test bypass times and the allowed outage times (* the reactor protection system (RPS) and engineered i

safety feature actuation system (ESF xS). The enclo. sed SER was prepared by the Division of Reactor Controls and Human Factors with input from the Division of Systems Safety and Analysis and accepts topical report WCAP-14333 for referencing in plant-specific license amendment applications.

i in WCAP-14333P, the WOG proposed relaxations in the technical specification required test bypass times and allowed outage times (AOTs) for the reactor protection system (RPS) and engineered safety feature actuation system (ESFAS). The staff used a three-tiered approach to evaluate risk associated with the prop sed changes. The approach is consistent with the guidance in Draft Regulatory Guide DG-1065, "An Approach for Plant-Specific, Risk-informed Decision Making: Technical Specifications." The first tier evaluates

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the !icensee's probabilistic risk analysis (PRA) model and the impact of the change on plant operational risk. The second tier addresses the need to preclude potentially high risk configurations, should additional equipment outages occur during the AOT period. The l

third tier evalurtes the licensee's configuration risk management program (CRMP), to ensure that equipment removed from service immediately prior to or during the proposed AOT will be appropriately assessed from a risk perspective.

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l Louis F. Liberatori - Page 2 changes in RPS and ESFAS instrumentation AOTs should result in only a very small quantitative impact on plant risk. The PRA insights generally support the proposed changes; however, the generic applicability of the PRA analysis in the topical report to all Westinghouse plants introduces a larger degree of uncertainty. Therefore, the staff expects licensees that use this topical report to justify the extended test times and AOTs by providing the following plant-specific information:

1.

Confirm the applicability of the WCAP-14333P, analyses for their plant.

2.

Address the Tier 2 and 3 analyses including the CRMP insights which confirm that these insights are incorporated into their decision making process before taking equipment out of service.

Should you have any questions or wish further clarification, please call the contact individual indicated below.

l Sincerely, N N ll knh.

l a;u homas H. Essig, Acting Chi

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l Generic issues and Environm tal Project Branch l

Division of Reactor Program anagement l

Office of Nuclear Reactor Regulation i

Enclosure:

As stated

Contact:

Hukam Garg, HICB (301) 415-2929 cc:

See Attached i

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1 Louis F. Liberatori - Page 2 Mr. J. Andrachek Westinghouse Electric Corporation Mail Stop East Bay 4-10 P.O. Box 355 Pittsburgh, PA 15230-0355 Mr. Jack Bastin, Director Regulatory Affairs Westinghouse Electric Corporation 11921 Rockville Pike Suite 107 Rockville, MD 20852 Mr. Andrew Drake, Project Manager Westinghouse Owners Group Westinghouse Electric Corporation i

Mail Stop ECE 5-16 P.O. Box 355 Pittsburgh, PA 15230-0355 Mr. Hank Sepp, Manager Regulatory and Licensing Engineering Westinghouse Electric Corporation Mail Stop ECE 4-07A P.O. Box 355 Pittsburgh, PA 15230 0355 l

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