ML16341F902
| ML16341F902 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 12/10/1990 |
| From: | Rood H Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9012130032 | |
| Download: ML16341F902 (62) | |
Text
{{#Wiki_filter:December 10, 1990 DOCKET NOS.: 50-275 and 50-323 LICENSEE: FACILITY:
SUBJECT:
PACIFIC GAS AND ELECTRIC COMPANY (PG&E) DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2
SUMMARY
OF NOVEMBER 27, 1990 PUBLIC MEETING TO DISCUSS THE RISK-BASED TECHNICAL SPECIFICATIONS PROGRAM DEVELOPED BY EPRI, PG&E, AND WESTINGHOUSE On November 27, 1990 the NRC staff met with representatives of the Pacific Gas and Electric Company (PG&E or the licensee), Westinghouse, and NUMARC in Rockvi lie, Maryland to discuss the above subject. Attendees at the meeting are given in Enclosure 1. Viewgraphs presented by PG&E/Westinghouse at the meeting are given in Enclosure 2. At the meeting PG&E and Westinghouse presented the results of recently completed interviews with utility personnel at five U. S. reactor sites. The five sites were selected on the basis of their experience with and use of .probabilistic risk analysis (PRA). The next part of the program involves determining the approach and functional requirements of a system to identify plant configurations of high risk. At the conclusion of the the meeting, the licensee indicated that it would be prepared to discuss the results of the next part of the program after it is complete in July 1991, and that a meeting for that purpose could be arranged if the staff desired.
Enclosures:
1. Meeting Attendees 2. Licensee's Viewgraphs cc: w/enclosures - see next page Original Siped By: Harry Rood, Senior Project Manager Project Directorate V Division of Reactor Projects - III/IV/V DISTRIBUTION HWlRH g NRC & LPDR Docket Fi,le j FMiraglia JPar tlow BBoger JDyer ACRS(10) HRood OGC EJordan DRSP/PD5 HRood 1)5/90 TDunning RLobel JWing MVirgilio MSlosson MWobl PMorri.ll,. Region V PNarbut,. Region V Car 1EJohn son DRSP/(A)
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Hr. J. D. Shiffer Pacific Gas and Electric Company Diablo Canyon CC: NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P. 0. Box 369 Avila Beach, California 93424 Dr. Richard Ferguson, Energy Chair Sierra Club California 6715 Roc'anyon Creston, Califor nia 93432 Hs. Sandra A. Silver Mothers for Peace 660 Granite Creek Road Santa Cruz, California 95065 Hs. Jacquelyn C. Wheeler 3303 Barranca Court San Luis Obispo, California 93401 Managing Editor The Count Tele ram Tribune 1321 Jo nson Avenue P. O. Box 112 San Luis Obispo, California 93406 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Center San Luis Obispo, California 93408 Richard F. Locke, Esq. Pacific Gas 5 Electric Company Post Office Box 7442 San Francisco, California 94120 Mr. John Hickman Senior Health Physicist Environmental Radioactive Hgmt. Unit Environmental Management Branch State Department of Health Services 714 P Street, Room 616 Sacramento, California 95814 Regional Adminstrator, Region V U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Hr. Peter H. Kaufman Deputy Attorney General State of California 110 West A Street, Suite 700 San Diego, California 92101 Hs. Nancy Culver 192 Luneta Street San Luis Obispo, California 93401 Michael M. Strumwasser, Esq. Special Assistant Attorney General State of California Department of Justice 3580 Wilshire Boulevard, Room 800 Los Angeles, California 90010 Ms. Jacquelyn C. Wheeler 3303 Barranca Court San Luis Obispo, California 93401
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ENCLOSURE 1 ATTENDEES Public Meeting on Risk-Based Technical Specifications
- Tuesday, November 27, 1990 NAME Jerry Andre Tony Baker Tom Dunning Jim Eaton Dan Gallagher Warren Hall Roger Johnson Richard Lobel Harry Rood James Tomkins Ken Vavrek James Wing Mi 1 lard Wohl ORGANIZATION Westinghouse/PORI Westinghouse/Tech Specs NRC/NRR/OTSB NUMARC NRC (SAIC)
NUMARC PGKE/NSARA NRC/NRR/OTSB NRC/NRR/PDV PGKE/NSARA Westinghouse/PRA NRC/NRR/RAB NRC/NRR/OTSB
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ENCLOSURE 2 VIEWGRAPHS PRESENTED BY PG&E/WESTINGHOUSE Public Meeting on Risk-Based Technical Specifications
- Tuesday, November 27, 1990
NRC PRESENTATION RX K-BA ED TE H I AL PE XFX ATX R RAM EPRI PG&E WESTINGHOUSE NOVEMBER 27, 1990
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PROGRAM ORGANIZATION J. SURSOCK/EPRI PROJECT MANAGER J. TOMKINS/PG8(E PROGRAM MANAGER TECHNICAL SPECIFICATION COORDINATOR R. JOHNSON/PG8(E R. THIERRY/PGRE TECHNICAL DIRECTOR N. LIPARULO/W ASST. TECH. DIRECTOR - TECHNICAl ADVISORS K. VAVREK/W J. MclNERNEY/W PRA TASK LEADER G. ANDRE'/W TECH. SPEC. TASK LEADER T. BAKER/Q
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OUTLI E I. PURPOSE II. PROGRAM OVERVIEW III. SITE INTERVIEW (PHASE 1A/TASK 1) DISCUSSION BACKGROUND INFORMATION SITE INTERVIEWS IV. TECH SPEC ANALYSIS (PHASE 1A/TASK 2) DISCUSSION V. PROGRAM STATUS
I PRP E ASSESS UTILXTY SUPPORT FOR RISK-BASED TECHNICAL SPECXFICATIONS FOR CONTROL OF PLANT OPERATIONS. DEVELOP APPROACHES AND METHODS FOR OBTAXNING TECHNICAL SPECIFICATION IMPROVEMENTS USING RISK-BASED METHODS. ~ ASSESS POTENTIAL USEFULNESS OF AN XNTERACTXVE RISK ADVISOR AND DETERMINE FUNCTIONS THAT WOULD BE MOST BENEFICIAL.
~ PROGRAM ELEMENTS: INTERVIEWS TO OBTAIN UTILITY PERSPECTIVES ON THE USE OF RISK-BASED APPROACHES TO CONTROL PLANT OPERATIONS - SYSTEM SPECIFIC AOT/STI IMPROVEMENTS. FLEXXBLE TECHNICAL SPECIFICATIONS ~ DEFINITION, EVALUATION, AND ASSESSMENT OF INTERACTXVE RISK ADVISOR (IRA). I HOTIVATION: IMPROVE PLANT AVAXLABXLITYWHILE MAINTAINXNG PLANT SAFETY. EPRI STUDY PRELIMINARY RESULTS. 15 o OF FORCED OUTAGES DUE TO TECH SPEC COMPLXANCE PROBLEMS 75o OF THESE CAN BE ADDRESSED BY RISK ARGUMENTS
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II PR RAM VERVIEW T D TASK 1: PROGRAM DEFINITION OBTAXN UTILITY FEEDBACK ON: PLANT CONFIGURATION MANAGEMENT PHXLOSOPHIES PROBLEM AREAS FOR TECH SPEC COMPLIANCE RISK"BASED APPROACHES/RISK MONITOR CONCEPT USE OF IRA ~ DEFINE IRA SYSTEM REQUIREMENTS ON-LINE PRA( PLANT MONITOR, LCO MONITOR FACTOR IN UTILITY RESPONSES
RA VER IEW PHA E 1A. TASK 2: CANDIDATE TECH SPECS AND EVALUATION 0 IDENTIFY TECHNICAL SPECIFICATXONS OF INTEREST TO POSE AND GENERIC INTEREST TO THE INDUSTRY AND APPROACH. PERFORM LINE XTEM ANALYSIS. ~ PERFORM FLEXXBLE TECHNICAL SPECIFICATION ANALYSIS. INTEGRATE RESULTS OF ANALYSIS AND INTERVIEWS, AND PROVXDE FURTHER DEFXNITXON OF THE IRA. 0 DEVELOP SUBMITTAL GUXDANCE.
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II PR RA VE VIEM T D HA E 18'ASK 3: RISK MODEL DEVELOPMENT ~ DEVELOP RXSK MODEL REQUIREMENTS ~ DETERMXNE IRA AND RISK MODEL XNTERFACE FUNCTIONAL SPECXFICATIONS P EVALUATE THE FEASIBILXTY OF THE RISK MODEL/TECH SPEC APPROACH TASK 4: INTERACTIVE RISK ADVISOR ASSESSMENT 0 DEVELOP DETAILED FUNCTIONAL SPECXFICATXONS DEMONSTRATE FEASXBILITY OF IRA E 2' DEVELOP IRA PROTOTYPE
E 1 DI ,.RISK-SASED APPROACHES IRA CONCEPT SITE INTERVIEWS " OBJECTIVES AND APPROACH 0 SITE INTERVXEM RESULTS I IRA ASSESSMENT
TO IMPROVE EFFECTIVENESS OF TECH SPECS, THE NRC XNXTXATED A PROGRAM TO IDENTIFY AND EVALUATE RISK AND RELIABILXTY-BASEDAPPROACHES. THE STUDY XDENTIFIED FOUR RISK-BASED APPROACHES'EAL-TIME RISK-BASED APPROACH A RELIABILITYGOAL"ORIENTED APPROACH A DATA ORXENTED APPROACH AN APPROACH BASED ON CONFIGURATION CONTROL FURTHER DEVELOPMENT OF A COMBINED REAL-TIME RISK BASED AND CONFIGURATION CONTROL APPROACH WAS RECOMMENDED. 0 THE NRC, XN CONJUNCTION WITH AN AD HOC INDUSTRY WORKXNG GROUP, HAS RECENTLY ATTEMPTED TO DEFXNE THE REQUIREMENTS AND BASIS FOR A REAL TXMEr ON-LINE RISK MONXTOR. 0 SEVERAL INSTITUTIONAL AND TECHNXCAL PROBLEMS WITH THE CONCEPT OF RISK MONITOR HAS LEAD EPRI TO PURSUE ANOTHER APPROACH TO TECH SPEC IMPROVEMENTS'ROBLEMS WITH THE RISK MONITOR CONCEPT INCLUDE: XNCORPORATING RISK-BASED TECH SPEC XNTO THE OPERATING AND REGULATORY ENVIRONMENT PRA UNCERTAXNTXES AND MODEL LIMITATIONS
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I TERA TIVE RI K ADVI R EPT PROVIDE INCREASED OPERATIONAL FLEXIBILXTY ALLOW FOR CONTROL QF PLANT SAFETY 0 PROVIDE BENEFITS OF REAL-TIME RISK MONITOR WHILE AVOIDING DEVELOPMENTAL OBSTACLES PROVIDE TOOLS AND RESOURCES TO IMPLEMENTS MAINTAINS AND CONTROL RISK-BASED TECH SPECS VISUALIZED AS A COMPUTERIZED TRACKING AND OPERATXONAL SUPPORT TOOL
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1 TERA I E RX DVX R D P S XBLE HARA TERISTX F A IRA' MONITOR COMPLIANCE WITH LCOS AND ALERT OPERATOR OF POTENTIAL NON COMPLIANCES. PROVIDE OPTIONS FOR FLEXIBLE TECH SPECS. PRE-DEFXNED LCO ALTERNATXVE REQUIREMENTS 0 TRACK CASCADXNG EFFECTS OF INOPERABLE SUPPORT SYSTEMS. TRACK THE INTERACTXONS BETWEEN SYSTEMS WITH RESPECT TO t.co COMPLIANCE ESTABLISH RELIABILITYTARGETS FOR SYSTEMS AND COMPONENTS. SET LIMXTS ON EQUXPMENT AND SYSTEM RELXABXLITY TRACK EQUIPMENT AND SYSTEM RELXABILXTYAND COMPARES THIS TO LIMITS XDENTIFY THOSE SYSTEMS NOT MEETING REQUXREMENTS
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D I I RA' IDENTIFY PLANT OPERATING CONFIGURATIONS TO BE AVOIDED'RACK COMPONENT AND SYSTEM STATUS ON A REAL TXME BASXS ALERT OPERATORS OF CONFIGURATXONS WHICH SHOULD BE AVOXDED PROVIDE MEANS OF DETERMINING RISK XNCREASE ASSOCXATED WXTH A PLANNED CONFIGURATXON ~ IDENTIFY NEEDS FOR PRA CONFIGURATXON CONTROL. TRACK PLANT DESIGN i OPERATIONAL'ND RELXABXLXTY DATABASE CHANGES PROVIDE ALERT WHEN CHANGES ARE SUFFICIENT ENOUGH TO WARRANT REVXSXNG TECH SPECS AND THEXR BASIS EMPLOY LIMITED VERSION OF REAL-TXME RISK MONITOR.
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ITE I TERVXEW ITE I ERVXEW B E TXVE ~ TO OBTAIN UTILITY FEEDBACK ON: COSTS AND BENEFITS OF THE VARIOUS RXSK-BASED APPROACHES TO IMPROVXNG TECHNXCAL SPECIFICATIONS TECHNXCAL SPECIFICATXON COMPLXANCE PROBLEM AREAS SYSTEM OPERABILITY DETERMXNATXON AND METHODOLOGY CONFIGURATXON MANAGEMENT PHILOSOPHIES TECH SPEC COMPLIANCE SYSTEMS EVALUATION USE AND DESIRABILITY OF AN ERA
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ITE I TERVXEM TD I E I TERVXEM ADDRESS A BASXC SET OF QUESTIONS TO UTILITY PERSONNEL ON THE FOLLOMING TOPICS: OPERABXLXTY DETERMINATION CONFIGURATXON CONTROL MANAGEMENT PHXLOSOPHXES TECHNICAL SPECXFICATION COMPLXANCE CONCERNS PRA LICENSXNG ISSUES RISK-BASED APPROACHES TO TECH SPECS AND THE IRA CONCEPT ~ FIVE UTILXTIES INCLUDED IN INTERVIEl4 PROCESS. BASED ON OUR PERCEPTIONS OF THEIR SXGNXFICANT XNVOLVEMENT IN PRA AND THEIR KNOWLEDGE OF AUTOMATED TECH SPEC COMPLIANCE SYSTEMS PMRS AND BMRS
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TER IE D ~ DISCIPLINES AVAILABLE FOR THE INTERVIEW PROCESS OPERATIONS MAINTENANCE TECHNICAL SPECIFICATIONS/LICENSING REGULATORY COMPLIANCE PRA TRAINING PRE-INTERVIEM PACKAGE DETAILING PROGRAM RISK-BASED APPROACHES ERA CONCEPT LIST OF TOPICS TO BE COVERED AND QUESTIONS TO ADDRESS
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RELIWX AR I E I ERVIE RE ASSESSMENT OF DISCIPLINES REPRESENTED AT THE I TER XEW I l.ICENSXNG/REGULATORY ASSURANCE WERE REPRESENTED AT ALL THE INTERVIEWS AND WERE GENERALLY STRONG CONTRIBUTORS. PRA WAS REPRESENTED AT FOUR OF THE INTERVXEWSt BUT WERE STRONG CONTRXBUTORS AT ONLY TWO. OPERATIONS WAS REPRESENTED AT THREE OF THE INTERVXEWS, BUT WERE STRONG CONTRIBUTORS AT ONLY ONE. MAINTENANCE WAS REPRESENTED AT THREE QF THE INTERVXEWS AND WERE GENERALLY NOT STRONG CONTRIBUTORS TO THE DISCUSSIONS. TRAINING WAS REPRESENTED AT FOUR OF THE INTERVIEWS AND GENERALLY WERE MODERATE CONTRXBUTORS TO THE DISCUSSIONS. THEY GENERALLY REPRESENTED THE OPERATIONS PERSPECTXVE.
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PRELXMI ARY ITE I ERVXEW RE LT T D TOPI 1'ERABILXTYDETERMI ATX OPERABILITY DETERMXNATION IS OPERATOR DRXVEN WITH TECHNICAL SUPPORT AVAXLABLE. 0 GENERALLY'F THE PLANT IS XN COMPLXANCE WITH TECH SPECS THEN IT IS ASSUMED OPERABILITY REQUIREMENTS ARE MET. 'I ttO AUTOMATED SYSTEMS ARE CURRENTLY IN USE AND ALL UTILITXES XNTERVXEWED ARE AWARE OF AUTOMATED SYSTEMS. IF AN AUTOMATED SYSTEM WAS AVAILABLEXN THE PLANT IT WOULD BE USED FOR GUIDANCE ONLY. THE PRIMARY CONCERNS WITH AUTOMATED SYSTEMS ARE'FFORT REQUIRED TO MAINTAIN THE SYSTEM UP TO DATE ACCURACY/CORRECTNESS OF THE MODELXNG
RESPONSE
TIME ADDITIONAL BURDEN ON OPERATIONS TO UNDERSTAND THE SYSTEM S DETERMINATIONS A SYSTEM TO ASSIST IN OPERABILITY DETERMINATIONS WOULD BE USEFUL PROVIDED IT ADDRESSED THE CONCERNS NOTED ABOVE AND COULD BE USED FOR GUIDANCE ONLY.
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PRELIMI ARY SITE I TERVIEW RESULTS CO T D TOPIC 2'ONFIGURATIO CO TROL MA AGEME T PHILOSOPHIE ~ NO AUTOMATED PROCESSES ARE IN PLACE TO CONTROL PLANT OPERATING CONFIGURATIONS. A PRA, EVEN WHEN AVAILABLE, IS NOT USED TO ASSESS THE RISK OF PARTICULAR CONFIGURATIONS OR TO IDENTIFY RISKY CONFIGURATIONS WHICH SHOULD BE AVOIDED. COMPLIANCE WITH TECH SPECS IS ASSUMED TO LEAD TO LOW RISK OPERATION. A PROCESS OR SYSTEM TO DOCUMENT CONFIGURATIONS WHICH SHOULD BE AVOIDED WOULD BE USEFUL.
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PRELIMI ARY SITE I TERVIEW RESULTS 0 T'D TOPIC 3: COMPLIA CE CO CERNS WITH TECH SPECS CURRENT AOTS PROVXDE SUFFICIENT TXME TO DQ TESTING AND ROUTINE MAINTENANCE. 0 EXTENDED AOTS WOULD BE WELCOMED TO ADDRESS SITUATIONS OF NON ROUTINE MAINTENANCE. SOME TECH SPEC CONCERNS WERE IDENTIFIED BY THE UTILITIES, THOUGH MANY OF THESE CAN BE ADDRESSED BY PROGRAMS ALREADY XN PLACE (WOG TOP, SWITCHING TO STS). ~ RISK ASSOCIATED WITH MODE TRANSITXONS IS XMPORTANT TO CONSXDER WHEN ASSESSING TECH SPEC IMPROVEMENTS. l ~ FLEXIBLE SPECXFICATIONS THAT ARE DEVELOPED NEED TO BE IMPLEMENTED IN A STRAXGHT-FORWARD MANNER.
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PRELIMX ARY SITE I TERVIEW RES LT T D TOPIC O'RA LICE SI G I SUE ALL SXTES INCLUDED IN THE INTERVIEWS HAVE PRA EXPERXENCE. TWO SXTES - PRA AVAXLABLE, SITE KNOWLEDGE, USED ON QUANTITATIVE BASIS TWO SITES - NRC PRA AVAILABLE, LIMITED SITE KNOWLEDGE, USED ON VERY LXMITED BASXS ONE SITE - PRA NOT AVAILABLE 0 ONE UTILXTY S EXPERIENCE XNDICATES THAT SUBMITTALS TO THE NRC BASED SOLELY ON PRA HAVE NOT BEEN WELL RECEXVED. ~ TWO UTXLXTIES HAVE NOT EXPERIENCED PROBLEMS WITH PRA BASED NRC SUBMXTTALS.
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PRELIMX ARY ITE I TERVIEW RESULT C T D TOPIC 4 PRA LICE SI G ISSUES CO T'D ~ PRA ARGUMENTS TO SUPPORT DETERMINISTIC ARGUMENTS AND FOR INTERNAL ASSESSMENT OF DESXGN OR OPERATIONAL CHANGES REPRESENTS THE TYPICAL USE OF PRA. 0 PRAS CONSIDER ONLY MODE 1 OPERATXON. NO SHUTDOWN PRAS WERE DONE. ~ PRA CONFIGURATION CONTROL (UPDATE) ISSUE IS ONLY BEGINNXNG TO BE ADDRESSED. CONCERN WITH POTENTIAL EFFORT REQUIRED TO MAKE AND MAINTAIN THE PLANT PRA PART OF LICENSING BASIS.
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PRELIMI ARY SITE I TERVXEW RESULT T D TOPIC 5: RISK-BASED APPROACHES TO TECH SPECS AND IRA C CEPT ~ RISK-BASED TECH SPECS MAY NOT BENEFIT PLANT OPERATION. ~ THE REAL-TIME RISK MONITOR WAS NOT SUPPORTED BY THE UTILITIES DUE TO: ADDITXONAL BURDEN ON OPERATIONS GOVERNING PLANT OPERATION ACCORDXNG TO AN ACCEPTABLE RISK LEVEL UNCERTAINTXES ASSOCIATED WITH PRA MODELXNG AND ASSUMPTXONS. I SEVERAL OF THE lRA FUNCTXONS WERE CONSIDERED USEFUL TO CONTROLLXNG.PLANT OPERATION, BUT THERE XS CONCERN THAT THEY COULD BECOME REQUIREMENTS IN THE EYES OF THE NRC. UTILITIES SUPPORT FOR THE FOUR RXSK-BASED APPROACHES: REAL-TIME RISK MONITOR - NO SUPPORT RELIABILITYGOAL ORXENTED APPROACH - NO SUPPORT DATA ORIENTED APPROACH - MARGINAL SUPPORT CONFXGURATXON CONTROL APPROACH - SUPPORT
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RELXMX ARY ITE I ERVXEW RE LT T D TOPIC 5: RISK-BASED APPROACHES TO TECH SPECS AND IRA EP ~ GENERAL SUPPORT FOR AN IRA PROVXDED IT WXLL NOT BECOME PART OF THE LXCENSXNG BASIS. 0 FUNCTIONS WHICH WERE GENERALLY CONSXDERED USEFUL XN AN lRA'ONITORING COMPLXANCE WITH LCOS AND ALERTXNG OPERATORS OF POTENTIAL NON-COMPLXANCES PROVIDING OPTXONS FOR FLEXXBLE SPECIFICATIONS TRACKXNG CASCADING EFFECTS OF INOPERABLE SUPPORT SYSTEMS ESTABLXSHING RELXABILITYTARGETS FOR SYSTEMS AND TRACKING AGAINST THESE TARGETS FOR MAINTENANCE PURPOSES IDENTXFICATION OF CONFIGURATIONS TO BE AVOXDED 0 AT THXS TIME THE UTILITIES GENERALLY SEE THE ERA AS SOMETHING NICE, BUT NOT NECESSARY AND COULD BE EXPENSIVE TO DEVELOP AND MAINTAXN~
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PRELXMI ARY SITE I TERVXEW CO LUSIO S THERE IS SITE INTEREST IN USXNG RISK-BASED APPROACHES TO IMPROVE PLANT OPERATION. TECHNICAL SPECIFICATION XMPROVEMENTS XDENTXFICATXON OF HIGH RXSK CONFIGURATIONS NO SUPPORT FOR USXNG THE RISK MONITOR APPROACH TO CONTROL PLANT OPERATION. GENERAL SUPPORT FOR THE IRA CONCEPT PROVIDING XT WOULD NOT BECOME PART OF THE LICENSXNG BASIS. NOT NECESSARY FOR PLANT OPERATION CURRENT METHODS USED TO CONTROL PLANT OPERATION ARE GOOD ENOUGH 0 INFORMATION FROM ANY TYPE OF RISK MONITOR OR IRA AVAXLABLEIN THE PLANT l40ULD BE USED FOR GUIDANCE ONLY. UTILITY CONCERN IS THAT THE RISK MONITOR OR IRA COULD BECOME PART OF THE PLANT LICENSING BASIS.
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IY TE H PE A ALY I PHASE 1A/TASK 2 DI CUSSX TECH SPEC XMPROVEMENTS TO BE ADDRESSED BASED ON SITE INTERVIEWS AND SPECIFIC DXABLO CANYON NEEDS. 0 PROVIDE PLANT SPECIFIC IMPROVEMENTS FOR DIABLO CANYON. PROVIDE GENERAL ANALYSXS GUXDELINES AND SUBMITTAL GUXDANCE FOR ALL UTILITIES. TECH/FLEX SPECS TQ BE CONSIDERED: ASSESS AOT EXTENSIONS FOR SEVERAL FLUXD SAFETY SYSTEMS. ASSESS AOT EXTENSION FOR THE AUXXLIARYSALT WATER SYSTEM BY CREDITING THE CROSSTXE LXNE. ASSESS ALTERNATE ACTXONS FOR DEGRADED AUXILIARY FEEDWATER SYSTEM CONFIGURATIONS. ASSESS AOT EXTENSIONS FOR FLUXD SYSTEMS BASED QN PAST SYSTEM OUTAGE TXME PERFORMANCE.
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V PROGRAM STAT S e PRELXMINARY DRAFT INTERVIEW
SUMMARY
REPORT COMPLETE ~ FINALXZE DRAFT REPORT BY NOVEMBER 30. FINAL REPORT ISSUED IN EARLY 1991. ~ MOG MEETING HELD ON NOVEMBER 14. ~ TECH SPEC ANALYSXS (PHASE 1A/TASK 2) STARTS ON DECEMBER 1 AND ENDS ON JUNE 31 t 1991. EXPANDED PHASE 1A TO INCLUDE A TASK TO ADDRESS THE APPROACH AND FUNCTIONAL REQUIREMENTS OF A SYSTEM TO IDENTIFY PLANT CONFIGURATIONS OF HIGH RISK. PHASE 1A COMPLETION DATE XS JULY 31 t 1991. I PHASE 1B AND 2 WILL BE RE-EVALUATED BASED ON THE RESULTS OF PHASE lA.
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