ML20054H330

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Slide Presentation Entitled, San Onofre Units 2 & 3 Seismic Sys Interaction Program,Description of Southern CA Edison Program,Nrc Staff Review of Southern CA Edison Program
ML20054H330
Person / Time
Site: 05000000, San Onofre
Issue date: 04/29/1982
From:
NRC
To:
Shared Package
ML20049A511 List:
References
FOIA-82-176 NUDOCS 8206230255
Download: ML20054H330 (21)
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c, SAN ON0FRE UNITS 2 AND 3 SEISMIC SYSTEi1S INTERACTION PROGRAft DESCRIPTION OF SCE'S PROGRAM NRC STAFF REVIEW 0F SCE'S PROGRAM t

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OBJECTIVES OF SCE'S PROGRAM ENSURE THAT THE SAFETY-RELATED STRUCTURES, SYSTEMS AND COMPONENTS WILL NOT LOSE THEIR CAPABILITY TO PERFORM THEIR INTENDED SAFETY FUNCTIONS AS A RESULT OF SEISMICALLY-INDUCED PHYSICAL INTERACTIONS WITH NON-SEISMIC CATEGORY I EQUIPMENT, ENSURE THAT THE REDUNDANT SAFETY-RELATED SYSTEMS WILL NOT LOSE THEIR CAPABILITY TO ACCOMMODATESINGLEFAILURESASARESULTOF SUCH INTERACTIONS.

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d APPROACH USED IN SCE'S PROGRAM ASSUMEDTHATNON-SEISMICCATE0GRYkEQUIPMENT WOULD FAIL STRUCTURALLY AS A RESULT OF'A SEISMIC EVENT AND SUCH FAILURE WOULD NON-MECHANISTICALLY PREVENT THE SAFETY-RELATED STRUCTURES, SYSTEMS AND COMPONENTS FROM PERFORMING THEIR INTENDED SAFETY FUNCTIONS.

NON-SEISMIC CATEGORY I~ EQUIPMENT (1) WAS SHOWN~

TO BE ABLE TO ACCdMMODATE THE SSE WITHOUT LOSS OF STRUCTURAL INTEGRITY.OR (2) WAS PROVIDED WITH

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UPGRADED SUPPORTS TO ENSURE THAT THE EQUIPMENT WOULD BE ABLE TO ACCOMMODATE THE SSE WITHOUT LOSS OF STRUCTURAL INTEGRITY.

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l' IMPLEMENTATION OF SCE'S PROGRAM

. GENERIC UPGRADING ~ PHASE - GENERIC NON-SEISMIC CATEGORY I EQUIPMENT WAS SHOWN TO BE ABLE T0-ACCOMMODATE THE SSE OR WAS PR0VIDED WITH UPGRADED SU.PPORTS (DURING DESIGN).

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PLANT AREA UPGRADING PHASE - AREA-SPECIFIC DESIGN REVIEW TO IDENTIFY THE REMAINDER OF THE NON-SEISMIC CATEGORY I EQUIPMENT (DURING DESIGN).

.' PLANT AREA WALKTHROUGH PHASE - FIELD WALKTHROUGH TO IDENTIFY ANY NON-SEISMIC CATE0GRY I EQUIPMENT NOT PREVIOUSLY C'ONSIDER,ED (FOLLOWING CONSTRUCTION),

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NRC STAFF REVIEW 0F SCE'S PROGRAM CONDUCTED BY_ REVIEW TEAM CONSISTING 0F TWO SIB MEMBERS AND ONE MEB MEMBER.

TWO-PART REVIEW:

(1) INHOUSE REVIEW OF SCE'S PROGRAM AS DESCRIBED IN THE FSAR AND AMENDMENTS THERETO.

(2) ONSITE AUDIT OF SCE'S PROGRAM.

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INHOUSE REVIEW 0F SCE'S PROGRAM I

OBJECTIVES OF PROGRAM

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SCOPE OF PROGRAM i

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.i ORGANIZATION ESTABLISHED TO IMPLEMENT PROGRAM 4

METHODOLOGY USED TO IMPLEMENT PROGRAM CRITERIA USED IN PROGRAM e

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ONSITE AUDIT OF SCE'S PROGRAM THREE-DAY ONSITE AUDIT CONDUCTED BY NRC REVIEW TEAM IN EARLY-MARCH 1981 OB'J E CTI V ES :

(1) REVIEW STATUS OF SCE'S PROGRAM AND ANY OUTSTANDING MATTERS ASSOCIATED THEREWITH (2) REVIEW REPRESENTATIVE EXAMPLES OF FIELD DOCUMENTATION (3) OBSERVE REPRESENTATIVE' EXAMPLES OF UPGRADED EQUIPMENT SUPPORTS (4) CONDUCT INDEPENDENT WALKTHROUGHS/WALKDOWNS OF SELECTED PLANT AREAS / EQUIPMENT e

INDEPENDENT WALKTHROUGHS/WALKDOWNS (1) REPRESENTATIVE AREAS / EQUIPMENT IN EACH BUILDING CONTAINING SAFETY-RELATED EQUIPMENT e

(2) CATEGORIES OF INTERACTIONS POSTULATED DURING DI ABLO CANYON SEISMIC SYSTEMS INTERACTION PROGRAM O

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6 FINDINGS AND REMAINING ACTIONS REVIEW HAS PROVIDED REASONABLE ASSURANCE THAT:

(1) SAFETY-RELATED PLANT STRUCTURES,. SYSTEM.S AND COMPONENTS WILL NOT LOSE THEIR CAPABILITY TO PERFORM THEIR INTENDED SAFETY FUNCTIONS AS A RESULT OF SEISMICALLY-INDUCED PHYSICAL INTERACTIONS WITH NON-SEISNIC CATEGORY I EQUIPMENT (2) REDUNDANT SAFETY-RELATED PLANT SYSTEMS.WILL NOT LOSE THEIR CAPARILITY TO ACCOMMODATE SINGLE FAILURES AS A. RESULT OF SUCH INTERACTIONS CONCLUDE THAT SCE'S PROGRAM IS ACCEPTABLE REMAINING ACTIONS:

(1) SCE TO AMEND FSAR TO DOCUMENT IN' FORMATION AND COMMITMENTS' P.EQUESTED DUPsING AUDIT (2) NRR TO PREPARE AND ISSUE SER SUPPLEMENT SUMMARIZING RESULTS OF EVALUATION OF SCE'S PROGRAM IMPLEMENTATION OF REMAINDER OF SCE'S PROGRAM, INCLUDING ANY ANALYSES, TESTS AND PLANT MODIFICATIONS, WILL BE. F0L' LOWED BY IE DURING NORMAL COURSE OF THEIR INSPECTION ACTIVITIES S

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s DIABLO CANYOM SYSTEMS INTERACTION PROGRAM.

FOR SEISMICALLY-1)!DUCED EVENTS 3ACKGR0i)ND DESCRIPT10NOF.PG)E'.SPRO,GRkM,k,ND

SUMMARY

OF RESULTS OBTAINED UP TO AUGUST 1, 1980

?!RC STAFF.REVIEhl OF PG&E'S PROGRAM t

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BACKGROU!!D PROGRAMDEVELOPbDASkRESULT.OFDISCUSSIONS CONCERNING THE EFFECTS OF SEISMICALLY-INDUCED FAILURESONSYSTbM,,SkFbTY,kTThEI'0VEtiBER5, 1979 TMI-2 ACCIDENT IMPLICATIONS ACRS SuB50MMITTbE' fikETING REQUIREMENT SUBSEQUENTLY DOCUMENTED IN IASK II C' 3 0F E!UR$G0660

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OBJECTIVES ESTABLISHbONFIDENCbTHkTWHbNSUBJECTEDTO SEISMIC EVENTS OF SEVERITY UP TO AND INCLUDING T}iE PbSTULA[ED 7.5[i t'OSGRI EVbNT, STRUCTURbS,,

SYSTEMS AN.D COMPONENTS IMPORTANT TO SAFE _TY SHALL NOT BE PREVENTED FROM PERFORMING THEIR INTENDED Sk.FETY FU._h.CTIOUS A.b.._RbSULh.0F PHY.SIbkL IN ACTIONS CAUSED BY. SEISMICALLY-INDUCED FAILURES OF NO,N-SAFETY-RELATED STRUCTURES, SYSTEMS OR COMPONENTS INADDITI0fl,SkFEfh-RbLkTEDSTRUCTURES ShSTEMS f

AND COMPONENTS SHALL NOT LOSE THE REDU!iDANCY REQUIREDT0bOMoEUSAkbFORSINGLEFILURESkS A RESULT OF SUCH INTERACTIONS e

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APPROACH t

!IkLKDOWN METHOD OF POSTULkTING ShSTEMS INTERACTIONS:

(1)SAFETh-RELATkDSTRUbTURES,ShSTEMS, AND COMPONENTS DEFINED AS " TARGETS" (2)RON-SAFETY,-RELATEDSTRUbTURES,-ShSTEMS AND COMPONENTS DEFINED AS " SOURCES" (3)INTERkbTI'ONSBETWEENSOURbES.kND TARGETS POSTULATED BY INTERDICIPLINARY TEAM OF EXPERIENCED ENGINEERS (INTERACTION T'AM)DURINGShSTEMATIC, INPLANT WkLKDOWNS E

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DESCRIPTION 0F PG&E'S PP.0 GRAM APPR0kCH:

WALKDOWh METHOD OF POSTUL TIhiG SYSTEMS INTERAbTIONS (1)

SAFETY-RELATEDSTRubTURES,SYSTEMSAhiDCOMP0hENTSDEFINED AS " TARGETS" (2)

NON-SAFETY-RELATEDSTRUCTURES,SYSTEMSANDCOMP0h1ENTS DEFINED AS " SOURCES" (3) lNTERACTIONSBETWEEN.SOURCESANDThiGETSP0STULkTEDBY

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IN'TERDICIPLINARY, TEAM OF EXPERI,ENCED ENGINEERS (INTERACTION TEAM) DURING SYSTEMATIC, INPLANT WALKDOWNS OF TARGET EQUIPMENT (10 EXISTING PLANT FliRE ZONbS USED kS C0h4VENIENT SPATIAL SUB-DIVISIONS OR COMPARTMENTS INITIAL OFFICE ACTIVITIES:

(1)

IDENTIFICATION OF TARGET EQUIPMENT (2)

PREPARATIONOFbRITERIAANDGUIDkNCE (3)

ESTABLISHMENT OF,INFORMATION MANAGEiENT SYSTEM CRITERIAANDGUIDANbE:

(1)

FAILURE OF SOURCES (2)

POSTULATION OF INTERACTIONS (3)

EVALUATIONOFPOSTULkTEDINTERbTIONS (10 RESOLUTIONOFP0sTULkTEDINTERkCTIONS

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DESCRIPTIONOFPGEE'SPROGP3?i,COMT'D FIELDWALKDOWriACTIVITIES(PbRFORMEDBYINhbRDICIPLINARY INTERACTION TEAM):

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CONFIRMING WALKDOWNS (2)

INTERACTION WALKDOWNS (3)

INTERCOMPkRTMENTAL NALKDOWNS

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OTHER IMPORTANT ELEMENTS:

(1)

FINDINGSOFINTERkCTIONTEkM,EVALUkTEDDURINGSUbSEQUENT OFFICE-BASED TECHNICAL EVALUATION (2)

PLANTMODIFIckTIfNSWALkEDDOWNbY,1NTERAbTIONINkMTO ENSURE THAT NO NEW INTERACTIONS HAVE BEEN CREATED (3)

PROGRAMSUBJbCTT0'INDEPENDENTAUDIT,BYPG&E,'SQ'UALITY ASSURANCE DEPARTMENT AND TO INDEPENDENT REVIEW BY

' INDEPENDENT REVIEW 30ARD (IO ALL DOCUMENTATION SSOCIATEDWITHPROGRAMRETkINbDIN AUDITABLE AND RETRIEVABLE FORM i

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FINAL REPORT TO INCLUDE ALL WALKD0t{N I,NFORMATION, TyCHNICAL l

EVALUATION INFORMATION AND INTERACTION RESOLUTION INFORMATION l

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IMTEP.ACTIO.'!S POSTULo.TED UP TO AUGUST 1,1980*

CdTsG0it NUMBER STRUCTURALGRkTEi,PLkFbRM5 199 AND HANDRAILS PIPE 178

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ELECTRICAL LIGHT FIXTURES 1 61)

HVACEouiPMhNi 33 PIPE SUPPORTS 31

[iSCELLk'NEdUS 31 ShRVICEHOIbiS 16 '.

PPEMHIPRESTRkINTS 9

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TANKS AND VESSELS

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RESOLUTIO!! 0F I lTERACTI0'!S POSTULa.TED UP TO AUGUST 1, 1980 l

RESOLUTION IbjNBER PERCENT R' SOLVED BY INTER-207 30 E

ACTION TEAM DURING WALKDOWN RESOLVED BY ANALYSES 242 36 d

OR TESTS RESOLVED BY PLANT 228 34 MODIFICATIONS TOTiLS 677 100 k

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NRC STAFF REVIEl! 0F PGBE'S PROGRAM CONDUCTEDBhINTERDISb!'PLIN,ARhREVI,EhTEkM, goNSISTING OF,THRE,E SIB MEMBERS, ONE MEB MEMBER AND ONE LLL REPRESENTATIVE TWO-PART REVIEW:

(1)INHOUSE.REVIEh0FPGBE,'SPR0hRAM,S,DE, sbr-IBED IN PG8E'S REPORT AND REVISIONS THERETO, AND RESULTS OBTAINED.UP TO AUGUST 1, 1980 (2) ONSITE AUDIT OF PG&E'S PROGRAM O

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INH 0' SE REVIB! 0F PGtE'S PROGRAM J

SCOPE OF PROGRAM:

(1)SCOPEOFEQUIPMENTCONSIDEREDASTARGbTS (2)SCOPEOFINTERACTIONSCONSkDERbD ORGANIZATIONESTABLISHEDTOIMPLEMENTPRbGRkM:

(1) OVERALL ORGANIZATIONAL STRUCTURb (2)RESPONSIBILITIbSADREPORTINGRhQUIREMENTSOF EACH ELEMENT (3) COMPOSITION, INDEPENDENCEAhD,SbO,PE,0FREVIEW OF INDEPENDENT AUDIT AND REVIEW GROUPS METHODOLOGYEMPLOYbDINIMPLEMENTkTIONOFPROGRkM:

(1)INITIALOFFIbEAbTIVIT!bs (2)FiELDWkLKDOWN CTIVITIbS (3)0FFICE-BkSEDTbCHNICkLEVLUkTION (4). MODIFICATIONS (5)INDEPENDbNT UDITANDRbVIEW (6)INFORMATIONMANAGEMENTShSTEM O

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IB100SE DEVIEW 0F PG&E'S PROGRNL CONT'.0 CRITERIAANDGUIDkNbEUSEDTOEVALUkTNPOSSIBLb INTERACTIONS:

(1)Fi!LUREOFSbuRbES (2)POSTULATIONOFINThRAbTIONS (3)EviLUATIONOFPOSTULkThDINTEP.kCTIONU (Li)9.hSOLUTION'0FPOSTULATEDINTERAbTidNS RESULTS OBTAINED UP TO AUGUST 171980:

(1)MUMBEROFINTERkCTIONSPOSTULATED (2)TYPESOFINTERACTIbNSPOSTULAThD (3)RhSQLUTIONOFPOSTULAThDINThRAbTIONS

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0:! SITE AUDIT OF PG8E'S PROGRAM THREE-DAYAUDITCONDubTEDBYNRCREVIEWTEAMIN MID-JUNE 1980 OBJECTIVE 5:

(1) CONTINUE DISCUSSIONS RELATED TO, REVIEW OF PG&E'S PROGRAM (2)BEVIEWPROGRhSSMADhTODAThB PGhE (3) OBSERVE, PG&E'S WALKDOWN, TECHNIQUh Ai[D hXkMPLES OF POSTULATED INTERACTIONS (4) CONDUCT INDE, PENDENT WALKDONNS OF SELECTED TARGET EQUIPMENT INDEPENDENT WALKDOWNS:

(1) IURBINE-DRIVEN afb' SYSTEM (TURBINE STEkM SUPPLY PIPING, ELECTRICAL POWER SUPPLY,TO TURBItJE MOTOR-OP,ERATED THROTTLE VALVE AND PUMP DISCHARGE PIPING)

(2) PRESSUIRZER RELIEF TANK RUPTURE'DISbb' (3) CONTAINMENT VENTILkTION kND PURGE ShSThhi ISOLATION VALVES

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FIP.Dl!!GS, CONCLUS10!! A!!D FOLLOWUP REVIEWHASPROVIDEDREkSONkBLEAS5URANbETHkTI

(.l.)MHENSUBJECTEDTOSb!SMICEVENTSOFSbV,ER,ITh,UP,,

TO AND INCLUDING THE POSTULAT,ED 7.5M f!0SGR,1, EVENT, STRUCTURES, SYSTEMS AND COM,PONENTS IMPORTAN,T TO,,

SAFETY SHALL NOT BE PREVENTED,FROM PERFORMING THEIR INTENDEDSAFETYFUNCTIONSAS,A,RESyLT,0F, PHYSICAL, I,NTERACTIONS CAUSED BY,, SEISM,ICALLY,, INDUCE,D FAILURES OF NON-SAFETY-RELATED STRUCTURES, SYSTEMS OR COMPONENTS s..

(2) IN ADDITION, SAFETY-RELATED STRUCTURES, SYSTEMS AND COMPONENTS SHALL,NOT LO,S,E THE REDUNDANCY, REQUIRED TO COMPENSATE,FOR SINGLE FAILURES AS A RESULT OF'SUCH INTERACTIONS

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CONCLUDED THAT PGRE'S PROGRAM IS CbEPTkBLb IMPLEMENTkTIONOFPG&E'SPROGRAM, INCLUDINGPLANT MODIFICATIONS,WILLBEFOLLOWEDBYOFFICb0FINSPECTION" AND ENFORCEMENT DURING NORMAL COURSE OF TH.EIR INSPECTION ACTIVITIES PG&E WILL PROVIDE FOR OUR INFORMATION COPIES OF FINAL REPORT FOLLOWING COMPLETION OF PROGRAM O

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