ML20196E828

Summary of Meeting w/C-E & C-E Owners Group Re Problems Encountered in Review of Topical Rept CEN-327.Vendors/Owners Group Presentation Made on Extension of Refueling Interval Surveillances.Attendance List & Meeting Announcement Encl

ML20196E828
Person / Time
Site:	Calvert Cliffs
Issue date:	02/23/1988
From:	Wohl M Office of Nuclear Reactor Regulation
To:	Butcher E Office of Nuclear Reactor Regulation
References
NUDOCS 8803010314
Download: ML20196E828 (4)

Text

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d vA,u O/c p D4 UNITED STATES d NUCLEAR REGULATORY COMMISSION j WASHINGTON, D. C. 20665 t

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\3...../ FEB 2 31983 MEMORANDUM FOR: Edward J. Butcher, Chief Technical Specifications Branch Division of Operational Events Assessment NRR THRU: Richard L. Emch, Jr., Section Leader Review and Assessment Section Technical Specifications Branch Division of Operational Events Assessment, NRR FROM: Millard L. Wohl Special Projects Section Technical Specifications Branch '

Division of Operational Events Assessment, NRR

SUMMARY

OF MEETING WITH C-E, CE0G ON REVIEW OF TER ON _

C-E OWNERS GROUP TOPICAL REPORT CEN-327, "RPS/ESFAS EXTENDED TEST INTERVAL EVALUATION" The OTSB staff met with personnel from Combustion Engineering Company (C-E) and the Combustion Engineering Owners Group (CEOG) to discuss problems encountered in the review of CE0C- Topical Report CEN-327 with respect to extrapolability of Calvert Cliffs results to other C-E plants and bistable setpoint drift. Additionally, a Vendor /0wners' Group presentation was made on extension of _ refueling interval surveillances. The following is a sumary of the major issues requiring resolution following the meeting:

• Extrapolability of Calvert Cliffs Results on Extended Test Intervals (STIs) to other C-E Plants A presentation was made by C-E using Accident Sequence Evaluation Program (ASEP)models. Core damage frequency (CDF) contributions were calculated for each ASEP signal-related component to obtain CDF contribution estimates from all these components.

The staff felt that this (ASEP) method to determine extrapolability of Calvert Cliffs results might contain more error than possible simpler methods compar-ing actuation system and interfacing fluid systems unavailabilities, since actuation system unavailabilities are generally substantially smaller than fluid system unavailabilities.

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• Bistable Setpoint Drift The problem of bistable septoint drift, raised in the review of CEN-327 by the EG&G reviewers, is being examined generically by BNL/SAIC with respect to its risk contribution. Results of this study are expected soon.

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Edward ~J. Butcher p Enclosure 1 is'an attendance. list. . Enclosure 2 is the meeting announcement.

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j. Millard L. Wohl Special Projects Section Technical Specifications Branch: .. i-Division of. Operational Events Assessment. NRR-

Enclosure:

As stated

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T. E. Murley J. Snie7ek C.-E. Rossi Distribution OTSB r/f DOEA r/f PDR Central Files EJ8utcher DCFischer MLWohl 0TSB Members CH8erlinger WDLanning R8arrett SNewberry. s KCampe i EChow RRobinson ,.

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o f ENCLOSURE 1 NAME ORGANIZATION PHONE N0.

Mike Gancarz GE 203-285-4600 Richard Bernier ANPP/CE0G 602-371-4295 Stuart Webster C-E 203-285-4405 Ed Chow NRC 301-492-8119 Dick Robinson NRC/RES 301-492-3915 D. R. Lasher NRC/NRR 301-492-8443 Sang C. Rhow NRC/NRR 301-492-7587 David Finnicum C-E 203-285-3920 Larry A. Taylor Ark. Power & Light 501-964-3293 Deborah Matthews Omaha Public Power District 402-536-4001 Thomas C. Bordine Consumers Power 517-788-2977 Peter Nelson CE 203-285-4432 Millard L. Wohl NRC/0TSB 301-492-1181 Thomas J. McLeod SCE 818-302-1039 Lloyd Philpot CE 203-285-5210 E. J. Weinkam Florida Power & Light 305-694-4429 William E. Hutchins Northeast Utilities 203-665-5242 Ed Butcher NRC/ Tech. Spec. Br. 301-492-1183 Tom Dunning NRC/TSB 301-492-1189 i

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. . ME'MORANDUM FOR: Charlei . Rossi, Director  !

Division Of Operational Events Assessment '

Office of Nuclear Reactor Regulation FROM: Edward J. Butcher, Chief l Technical Specifications Branch Division of Operational Events Assessment Office of Nuclear Reactor Regulation

SUBJECT:

TECHNICAL SPECIFICATIONS IMPROVEMENT PROGRAM -- SPECIFIC LINE ITEM IMPROVEMEhT DATE & TIME: Thursday, January 14, 1988 9:00 a.m. - 2:30 p.m.

LOCATION: Room P-114 7920 Norfolk Avenue i Bethesda, Maryland PURPOSE: The purpose of the meeting is 1) to discuss staff review of the TER on CE Owners Group Topical Report CEN-327, "RPS/ESFAS Extended Test Interval Evaluation", with respect to extrapolability of I Calvert Cliffs results to other plants and to discuss bistable setpoint drift and 2) to discuss the risk significance of -

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switching from 18-24 mo. surveillance intervals. .

PARTICIPANTS: NRC CE0G CE ITButcher LTcT Bernier Fave Finnicum Rich Emch Ed Weinkam Stu Webster 2 Millard Wohl Larry Taylor Pete Nelson )

David Langford Tom Bordine Tom Dunning Tom McLeod Richard Robinson, RES Steve Evans INEL -

DaWd Mackowiak  ;

Qtiginal Signed By.

afd J. Butcher l Edward J. Butcher, Chief l Technical Specifications Branch Division of Operational Events Assessment Office of Nuclear Reactor Regulation Distribution: (MEETINGNOTICEMEMO)

Murley/5niezek BBHayes Of PDR JStoltz SAYarga VStello, EDO CHBerlinger WDLanning DMCrutchfield MClausen, OC TSB Members Central Files LCShao JGKeppler, OSP TSB R/F JGPartlow JLiebeman, OE TSB S/F - (MEETING NOTICE)

FCongel WGMcDonald, OARM Regional Administrators JRoe ELJordan, AE00 Phillips Bldg. Receptionist PMPDAS - 4th floor WBXerr, SDBU/CR DBrinkman .

SRConnelly, OIA PEBird, OP TCox .

WCParler, OGC HLThompson, NMSS SNewberry AThadani SJChilk, SECY N JCraig JHsuck Q.RCParticipants

- JJoyce TSB- E NRR TSB m EA:NRR C: . EA:NRR MWoh DCFischer EJ t er 12/m/87 12/M/87 12/1o/87

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