ML20207C226
| ML20207C226 | |
| Person / Time | |
|---|---|
| Issue date: | 05/21/1999 |
| From: | Wen P NRC (Affiliation Not Assigned) |
| To: | Carpenter C NRC (Affiliation Not Assigned) |
| References | |
| NUDOCS 9906020231 | |
| Download: ML20207C226 (15) | |
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h UNITED STATES j
,j NUCLEAR REGULATORY COMMISSION o
's WASHINGTON, D.C. 30666-0001 4
9 *****
May 21, 1999 MEMORANDUM TO: Cynthia A. Carpenter, Chief Ger eric issues, Environmental, Financial and Rulemaking Branch Division of Regulatory improvement Programs Office of Nuclear Reactor Regulation FROM:
Peter C. Wen, Project Manager d C, M Generic issues, Environmental, Financial and Rulemaking Branch Division of Regulatory Improvement Programs Office of Nuclear Reactor Regulation
SUBJECT:
SUMMARY
OF MAY 13,1999 MEETING WITH WESTINGHOUSE 1
OWNERS GROUP REGARDING ISSUES RELATED TO RISK-4 INFORMED TECHNICAL SPECIFICATION IMPROVEMENTS On May 13,1999, a public meeting was held at the U.S. Nuclear Regulatory Commission's (NRC's) offices in Rockville, Maryland, between members of the Westinghouse Owners Group (WOG) and NRC staff. Attachment i lists attendees at the meeting.
The purpose of the meeting was for the WOG to apprise the staff of its risk-informed technical l
specification (RI-TS) developments and potential initiatives. The WOG's presentation material l
is contained M Attachment 2. The major discussions and the staff's comments are summarized below:
i The WOG is engaged in RI TS Surveillance Test Interval (STI) Improvements and Allowed Outage Time (AOT) Improvements.
The WOG desires to evolve to an eventual goal of Configuration Risk Management in lieu of prescriptive TS.
The current WOG program will focus strongly on AOT related requests for electrical, fluid, and containment systems.
Proposed WOG submittal packages will focus on RI-TS AOT improvements for several systems including post-accident monitoring systems, refueling water storage tank, containment isolation valves, main steam safety valves, atomospheric dump valves and additional packages.
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C. Carpenter May 21, 1999 The WOG is participating in the industry's Risk-Informed Technical Specification Task e
Force (RITSTF) initiatives. These initiatives consist of (1) Determining appropriate TS end states, (2) Extending current time (24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />) for missed surveillances, (3) Revising LCO 3.0.4 to allow mode changes with LCOs not met, (4) Developing risk-informed AOTs, (5) Relocating surveillance requirements that are not related to safety functions, (6) Relocating STis to an administrative control program, (7) Revising LCO 3.0.3 to allow risk-informed actions based on plant configuration, and (8) Differentiating between operability vs. functionality.
l The staff and WOG agreed that a continuous dialogue should expedite development and review of the WOG's Rl-TS improvement program.
Attachments: As stated cc w/atts: See next page
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DISTRIBUTION: See attached page Document Name: g:\\pxwirnsum0513.wpd (A)hMEB OFFICE PM:RGEB: DRIP SPSB RTSB f
NAME PWen:sw Q MWohl h1M NGilleiiD\\k[M[
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OFFICIAL OFFICE COPY f I
l C. Carpenter May 21, 1999 The WOG is participating in the industry's Risk-Informed Technical Specification Task e
Force (RITSTF) initiatives. These initiatives consist of (1) Determining appropriate TS end states, (2) Extending current time (24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />) for missed surveillances, (3) Revising LCO 3.0.4 to allow mode changes with LCOs not met, (4) Developing risk-informed AOTs, (5) Relocating surveillance requirements that are not related to safety functions, (6) Relocating STis to an administrative control program, (7) Revising LCO 3.0.3 to allow risk-informed actions based on plant configuration, and (8) Differentiating between operability vs. functionality.
The staff and WOG agreed that a continuous dialogue should expedite development and review of the WOG's RI-TS improvement program.
Attachments: As stated cc w/atts: See next page
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Westinghouse Owners Group cc:
Mr. Nicholas Liparuto, Manager Equipment Design and Regulatory Engineering Westinghouse Electric Corporation Mail Stop ECE 4-15 P.O. Box 355 Pittsburgh, PA 15230-0355 l
l Mr. Andrew Drake, Project Manager l
Westinghouse Owners Group Westinghouse Electric Corporation I
Mail Stop ECE 5-16 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. Hank Sepp, Manager Regulatory and Licensing Engineering Westinghouse Electric Corporation PO Box 355 Pittsburgh, PA 15230-0355 l
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I NRC/WOG MEETING ON RI-TS LIST OF ATTENDEES May 13,1999 NAME ORGANIZATION Rich Barrett NRR/DSSA/SPSB Millard Wohl NRR/DSSA/SPSB Nanette Gilles NRR/ DRIP /RTSB Jack Foster NRR/ DRIP /RTSB Peter Wen NRR/ DRIP /RGEB Wayne Harrison STP Nuclear Operating Co.
Jim Andrachek Westinghouse Jerry Andre Westinghouse David Stellfox McGraw-Hill
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1 NRC/WOG Meeting WOG Risk-Informed Technical 1
Specification Improvements Wayne Harrison Chairman, WOG Licensing Subcommittee May 13,1999 i
WOG Risk-Informed Tech Spec Improvements Purpose
- Discuss with the NRC, WOG Risk-Informed Technical Specifications Improvements
- Obtain NRC feedback on approaches, schedule, and expectations Film,3 l
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WOG Risk-Informed Tech Spec Improvements Vision of Tech Spec Improvements Obj c:
Technical s
Specifications
. ST! Improvements
- AOTImprovements Management MIR S WOG Risk-Informed Tech Spec Improvements Instrumentation Tech Spec Improvements WCAP-10271, TOPS
- SERs in 1985,1989,1990 WCAP-14333
- Slave relay STI extension
+ WOO submittalin late 1999 M LM 4 2
WOG Risk-Informed Tech Spec Improvements Other Tech Spec Improvements WCAP-15049 Accumulator AOT Extension
- Consistent with industry activities
- Pursuing WOO funding mms WOG Risk-Informed Tech Spec Improvements Current WOG RTS/ESFAS AOT/STI Program Changes Being Evaluated Extend RPS surveillance test intervals
- Reactor trip breakers from 2 months to 6 months
- Logic cabinets and master relays from 2 months to refueling
- Considering analog channel test intervals extensions also (3 months to 6 months)
Reactor trip breaker AOT from I hour to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />
- Reactor trip breaker bypass time from 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> to 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> mme 3
woo Risk-Informed Tech Spec Improvements Current WOG RTS/ESFAS AOT/STI Program Approach Risk-informed approach consistent with Reg Guides 1,174 and 1.177 WOG TOP (WCAP-10271) examined STI changes for all components of the RPS, but only proposed changes to the analog channels
- Used generic component failure rates
- Older PRA model Use data from Westinghouse plant experience M I/99.1 WOG Risk-Informed Tech Spec Improvements Current WOG RTS/ESFAS AOT/STI Program Approach (Cont'd)
Expect improved plant specific component failure rates Model
- Use up-to-date PRA model for risk analysis'
- Use models developed in WCAP-10271 (TOP) and WCAP-14333 for signal unavailability analysis Generic analysis applicable to all E plants m.
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WOG Risk-Informed Tech Spec Improvements Current WOG RTS/ESFAS AOT/STI Program Program Tasks Data collection and analysis
- NUREG/CR-5500," Reliability Study: Westinghouse i
RPS,1984 -1995"
- WOG plant data j
Signal unavailability analysis Risk analysis WCAP development (November,1999 submittal) e WOG Risk-Informed Tech Spec Improvements Current WOG RTS/ESFAS AOT/STI Program Program Benefits Reduced component unavailability Fewer component actuations and less wear Additional time to complete reactor trip breaker (RTB) maintenance activities Reduced testing on the RPS - cost savings Improved plant operating flexibility m.
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WOG Risk-Informed Tech Spec Improvements RI Tech Spec AOT Improvements Objectives Develop the approach to apply the results and methods developed in the accumulator AOT program to numerous additional systems Ensure consistency of the approach with the NRC risk-informed Reg Guides and SRPs Support NRC/ industry RI Tech Spec initiative WOG Risk-Informed Tech Spec Improvements RI Tech Spec AOT Improvements
Background
Continuation of accumulator AOT extension program Similar to CEOG approach to AOT extensions One consistent method, utilities apply using plant specific PRA models Common report (s) provided to NRC with participating utility results 1
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1 WOG Risk-Informed Tech Spec Improvements I
RI Tech Spec AOT Improvements Tasks and Schedule Identify Specific Analysis Requirements,3/99 to 1/00 i
Utility Plant Specific Evaluations,6/99 to 3/00
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Collect and Review Plant Specific Results,9/99 to 6/00 Develop WCAP Report and Submit to NRC,4/00 to 8/00 I
j mim.n Risk-Informed Tech Spec Improvements RI Tech Spec AOT Improvements Tech Spec / System /AOT in Order ofInterest to the WOG 3 8 4. DC Sowcas, inoperable DC sowes,2 hr to 24/48 hrs 3 81. AC Sowces, anoperable AC sowce,72 hrs to 7 days 3.5 2.ECCS, moperable tram,72 hrs to 7 days 3.2 4.DC Sowces, inoperable banery charger,2 bra to 24/48 hrs 3 8 9 Distribution Systems, inoperable DC dist subsystem. 2 hrs to 24/48 hrs 3 8 9. Detribution Systerns, moperable AC vital bus,2 hrs to 24 hrs 3 8 9. Distribution Systems, inoperable AC dist. subsystem,I hr to 721 irs 3 81 ACSowcca. required acuans A.2, B.31.B.3.2 C.2,24 to 72 hrs 3 6.3 CIV, moperable CIV,4 hr to 24 hrs 3 5 7. Inverters, inoperable everier,24 hrs to 48 his 3.7.8 SW5, moperable train,72 his to 7 days 3.6 6A. Cont spray and coolmg, inoperable train,72 br to 7 days 3.7 7. CCW, inoperable tram,72 hr to 7 days 3.5 4 RW3T, boron concenirstion and temperstwe out oflunit. I hr to 24 hr 3.7.1 M35V, power reduction for inoperable MSSV,4 hr to 24 hr j
3 7 4. ADV, inoperable ADV,7 days to 30 days 3.3 3 - PAM,2 moperable H2 monnors,72 hr to 7 days mim.H i
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WOG Risk-Informed Tech Spec Improvements RI Tech Spec AOT Improvements Submittal Packages Generic changes
- PAM
- RWST
- CIVs
- MsSVs
- ADVs Additional package (s)
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WOG Risk-Informed Tech Spec Improvements RI Tech Spec AOT Improvements Program Benefits Additional time to complete component test and maintenance activities leading to improved component performance j
Mode choice for performing maintenance activities
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- Safety impmvement
- Additional preventive maintenarce activit.ics at-power
- Reduced plant downtime Smaller potential for enforcement requests Improved plant operating flexibility
- 1499. M e
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WOG Risk-Informed Tech Spec Improvements NRC/ Industry's RITS Initiative WOG Program Detennine apprcpriate Tech Spec end states Extend current time (24 hrs) for missed surveillances Revise LCO 3.0.4 to allow mode changes with LCOs not met Develop risk-informed AOTs Relocate SRs that are not related to safety functions Relocate STIs to an Admin Control Program Revise LCO 3.0.3 to allow RI actions based on plant configuration Differentiate between Operable vs. Functional WOG Risk-Informed Tech Spec Improv6ments l
NRC/ Industry's RITS Initiative l
Long-Term Objectives l
+ Develop fully risk-informed set of standard technical specifications
+
+ Use of configuration risk management WOG currently funding RIinitiatives j
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t Distribution: Mtg. Summary w/ WOG Re RI-TS Dated May 21. 1999 Hard Cooy MPESD -
PUBLIC PGEB R/F OGC ACRS PWen NGilles M Wohl.
EWM SCollins/RZimmerman ESheron Wkane DMatthews/SNewberry W Oc&ner
. R Dennig CCarpenter FAkstulewicz TBergman GHolahan/TCollins RBarrett M Rubin M Reinhart GTracey, EDO t
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