ML18037A072
| ML18037A072 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 02/25/1991 |
| From: | NANDY F R SOUTHERN CALIFORNIA EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9103010220 | |
| Download: ML18037A072 (16) | |
Text
ACCELERATEDDISTRIBUTIONDEMONSTRATIONSYSTEMREGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9103010220DOC.DATE:91/02/25NOTARIZED:NOFACIL:50-361SanOnofreNuclearStation,Unit2,SouthernCaliforn50-362SanOnofreNuclearStation,Unit3,SouthernCalifornAUTH.NAMEAUTHORAFFILIATXONNANDY,F.R.SouthernCaliforniaEdisonCo.RECIP.NAMERECIPIENTAFFXLIATIONDocumentControlBranch(DocumentControlDesk)SUBZECT:ProvidesEDGannualreptfor1990,perTechSpec6.9.1.44.8.1.1.3ofAppA,respectively.DISTRIBUTIONCODE:A001DCOPIESRECEIVED:LTRLENCLtSIZE:TXTLE:ORSubmittal:GeneralDistributionNOTES:DOCKET,g0500036105000362DRECIPIENTIDCODE/NAMEPD5LAKOKAJKO,L.INTERNAL:ACRSNRR/DET/ESGBNRR/DST8E2NRR/DST/SICB7ENUDOCS-ABSTRACTOGC/HDS3RES/DSIR/EIBEXTERNAL:NRCPDRCOPIESLTTRENCL11226611111111101111RECIPIENTIDCODE/NAMEPD5PDNRR/DET/ECMB9HNRR/DOEA/OTSB11NRR/DST/SELB8DNRR/DST/SRXB8EOC/LFMBR01NSICCOPIESLTTRENCL1111111111101111DDNSRIlDNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEKVASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:LTTR24ENCL22DD
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SouthernCaliforniaEdisonCompany23PARKERSTREETIRVINE,CALIFORNIA92718F.R.NANDYMANAGER.NUCLEARLICENSINGFebruary25,1991TCLGPHONG(714)4544504U.S.NuclearRegulatoryCommissionDocumentControlDeskWashington,D.C.20555
Subject:
DocketNos.30-361and50-362DieselGeneratorAnnualReport-1990SanOnofreNuclearGeneratingStation,Units2and3ThepurposeofthisletteristoprovidetheEmergencyDieselGeneratorAnnualReportfor1990asrequiredbyTechnicalSpecifications6.9.1.4and4.8.1.1.3ofAppendixA,TechnicalSpecificationstoFacilityLicencesNPF-10andNPF-15forSanOnofreNuclearGeneratingStation,Units2and3,respectively.Therewerefourvalidtestfailuresandtwonon-validtestfailuresduring1990.Ifyourequireanyadditionalinformation,please',letmeknow.FVerytrulyyours,Enclosurescc:.J.B.Martin(RegionalAdministrator,NRCRegionV)C.W.Caldwell(NRCSeniorResidentInspector,Units1,2and3)InstituteofNuclearPowerOperations(INPO)ACi>0XOZZOVZOZZ>PDRADQCKOS000361RPDR I'I EmergencyDieselGeneratorReportSouthernCaliforniaEdisonCompanySanOnofreNuclearGeneratingStationUnits2and3,DocketNos.50-361and50-362EventDate:January12,1990ThefollowinginformationisprovidedinaccordancewithTechnicalSpecificationSurveillanceRequirement4.8.1.1.3andRegulatoryPositionC.3.bofRegulatoryGuide(RG)1.108asrevisedbyGenericLetter(GL)84-15.RG1.108requestedthefollowingsevenitemsforeachvalidorinvalidtestfailure:1.ThisfailureinvolvedavalidtestoftheSanOnofreUnit2EmergencyDieselGenerator(EDG)2G002.Thiswasthefirstfailureinthelast20validtestsandthefirstfailureinthelast100validtestsof2G002.(ReportedasrequestedinGL84-15.)3.Apost-maintenanceoperabilitytestof2G002wasterminatedduetonoindicationofeitherfieldvoltageorcurrentwithautomaticvoltageregulator(AVR)"B"selected.OperabilitywasverifiedwithAVR"A"selected.4.InspectionrevealedtwoburnedfusesforAVR"B".ThefuseswerereplacedandtheEDGwastestedsatisfactorilywithAVR"B"selected.5.Thiseventoccurredduringaperiodofinoperabilitypreviouslyscheduledformaintenanceactivities.6.Thesurveillancetestintervalremainedat31days.7.ThesurveillancetestintervalwasinaccordancewiththescheduleofTechnicalSpecificationTable4.8-1.Page1of6
'H EmergencyDieselGeneratorReportSouthernCaliforniaEdisonCompanySanOnofreNuclearGeneratingStationUnits2and3,DocketNos.50-361and50-362EventDate:January25,1990.ThefollowinginformationisprovidedinaccordancewithTechnicalSpecificationSurveillanceRequirement4.8.1.1.3andRegulatoryPositionC.3.bofRegulatoryGuide(RG)1.108asrevisedbyGenericLetter(GL)84-15.RG1.108requestedthefollowingsevenitemsforeachvalidorinvalidtestfailure:1.ThisfailureinvolvedavalidtestoftheSanOnofreUnit2EmergencyDieselGenerator(EDG)2G003.2.Thiswasthefirstfailureinthelast20validtestsandthesecondfailureinthelast100validtestsof2G003.(ReportedasrequestedinGL84-15.)3.Duringpostmaintenancetesting,EDG2G003trippedonloss-of-excitationunderfull-loadconditions.Investigationrevealedthattheloss-of-excitationwasduetolooseautomaticvoltageregulatorfuseclips.Theautomaticvoltageregulatorfuseclipswerecleanedandtightenedtoprovidepositivecontactand2G003wassuccessfullyretestedforoperability.Futureplantequipmentoperatortrainingwillincludeproperfusemanipulationstopreventrecurrence,5.Thisfailureoccurredduringaperiodofinoperabilitypreviouslyscheduledformaintenanceactivities.6.Thesurveillancetestintervalremainedat31days.7.ThesurveillancetestintervalwasinaccordancewiththescheduleofTechnicalSpecificationTable4.8-1.Page2of6
\'o0,Iltt1 EmergencyDieselGeneratorReportSouthernCaliforniaEdisonCompanySanOnofreNuclearGeneratingStationUnits2and3,DocketNos.50-361and50-362EventDate:August2,1990.ThefollowinginformationisprovidedinaccordancewithTechnicalSpecificationSurveillanceRequirement4.8.1.1.3andRegulatoryPositionC.3.bofRegulatoryGuide(RG)1.108asrevisedbyGenericLetter(GL)84-15.RG1.108requestedthefollowingsevenitemsforeachvalidorinvalidtestfailure:1.ThisfailureinvolvedavalidtestoftheSanOnofreUnit3EmergencyDieselGenerator(EDG)3G002,2.3.Thiswasthefirstfailureinthelast20validtestsandthesecondfailureinthelast100validtestsof3G002.(ReportedasrequestedinGL84-15.)Duringpostmaintenancetesting,EDG3G002trippedat57minutesintoaone-houroperabilitytest.Investigationrevealedthatanopencircuitcouldbecreatedacrosstheprimaryfuseholderwhenthefusewasmovedinit'sholder.Theloosefuseclipscombinedwithnormaloperatingvibrationcausederraticoperationoftheautomaticvoltageregulatorresultinginthe"highstatorovertemperature"alarm.Theautomaticvoltageregulatorfuseclipswerecleanedandtightenedtoprovidepositivecontactand3G002wassuccessfullyretestedforoperability.FutureplantequipmentoperatortrainingwillincludeproperfusemanipulationsaswasinitiatedinresponsetothefailureofJanuary25,1990.5.Thisfailureoccurredduringaperiodofinoperabilitypreviouslyscheduledformaintenanceactivities,6.Thesurveillancetestintervalremainedat31days.7.ThesurveillancetestintervalwasinaccordancewiththescheduleofTechnicalSpecificationTable4.8-1.Page3of6 li,4J't EmergencyDieselGeneratorReportSouthernCaliforniaEdisonCompanySanOnofreNuclearGeneratingStationUnits2and3,DocketNos.50-361and50-362EventDate:August3,1990ThefollowinginformationisprovidedinaccordancewithTechnicalSpecificationSurveillanceRequirement4.8.1.1.3andRegulatoryPositionC.3.bofRegulatoryGuide(RG)1.108asrevisedbyGenericLetter(GL)84-15.RG1.108requestedthefollowingsevenitemsforeachvalidorinvalidtestfailure:ThisfailureinvolvedavalidtestoftheSanOnofreUnit3EmergencyDieselGenerator(EDG)3G002.2.Thiswasthesecondfailureinthelast20validtestsandthethirdfailureinthelast100validtestsof3G002.(ReportedasrequestedinGL84-15.)3.Duringapost-maintenanceoperabilitytestofEDG3G002,oneofthetwo50%capacityemergencysupplyfansdidnotoperate.ThesefansarerequiredforcoolingtheroomduringEDGoperation.Thefanswerenotoperablethroughmanualorautomaticcontrolandthethermaloverloadswerefoundtripped.Thethermaloverloadswerereplacedwithqualifiedinkindpartsandtestedbymanuallystartingthefanthreetimes.Aone-hourtestrunofthefan(3MA275)wasperformedonthethirdstart.5.Thiseventoccurredduringaperiodofinoperabilitypreviouslyscheduledformaintenanceactivities.6.Thesurveillancetestintervalwasreduced&om31to7days.7.ThesurveillancetestintervalwasinaccordancewiththescheduleofTechnicalSpecificationTable4.8-1.Page4of6 I
EmergencyDieselGeneratorReportSouthernCaliforniaEdisonCompanySanOnofreNuclearGeneratingStationUnits2and3,DocketNos.50-361and50-362EventDate:September6,1990ThefollowinginformationisprovidedinaccordancewithTechnicalSpecificationSurveillanceRequirement4.8.1.1.3andRegulatoryPositionC.3.bofRegulatoryGuide(RG)1.108asrevisedbyGenericLetter84-15.RG1:108requestedthefollowingsevenitemsforeachvalidorinvalidtestfailure:1.ThisfailureinvolvedaninvalidtestoftheSanOnofreUnit2EmergencyDieselGenerator(EDG)2G003.2.Thiseventwasnotconsideredavalidtestof2G003.3.Duringapost-maintenanceoperabilitytest,EDG2G003trippedonhighcoolanttemperature.Thehighcoolanttemperaturewasaresultoftheradiatorfanpowersupplybreakersbeingopenedwithouteitherproperdocumentationorproceduraldirection.4TheradiatorfanbreakerswereclosedandEDG2G003retestedsatisfactorily.ArevisiontotheprocedurewillindicatethattheradiatorfanbreakersshouldbetaggedopenedwhentheDCcontrolpoweristaggedopened.Theresponsibleindividualswerecounseledontherequirementsformanipulatingsafetyrelatedequipment.AnOperatingDivisionExperienceReport(2-90-22)hasbeenpreparedinresponsetothisevent.5.Thisfailureoccurredduringaperiodofinoperabilitypreviouslyscheduledformaintenanceactivities.6.Thesurveillancetestintervalremainedat31days.7.ThesurveillancetestintervalwasinaccordancewiththescheduleofTechnicalSpecificationTable4.8-1.Page5of6
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ray>~LEmergencyDiesel'eneratorReportSouthernCaliforniaEdisonCompanySanOnofreNuclearGeneratingStationUnits2and3,DocketNos.50-361and50-362EventDate:September21,1990ThefollowinginformationisprovidedinaccordancewithTechnicalSpecificationSurveillanceRequirement4.8.1.1.3andRegulatoryPositionC.3.bofRegulatoryGuide(RG)1.108asrevisedbyGenericLetter84-15.RG1.108requestedthefollowingsevenitemsforeachvalidorinvalidtestfailure:1.ThisfailureinvolvedaninvalidtestoftheSanOnofreUnit2EmergencyDieselGenerator(EDG)2G002.2.Thiseventwasnotconsideredavalidtestof2G002.3.Duringpost-maintenancefunctionaltesting,EDG2G002failedtodevelopeithervoltageorfrequencyandwasmanuallyshutdowninresponsetothe"breakeropen"and"undervoltage/underfrequency"alarms.Anothertestattemptwasmadeafterswitchingfromautomaticvoltageregulator(AVR)"B"toAVR"A".ThissecondtestresultedinanEDGtriponanover-excitationalarm.InvestigationofthefailurerevealedthatthelinepotfuseswerenotinstalledwhentheEDGwasbeingreturnedtoservice.Thisfailurewasadirectconsequenceofoperatorerror.4Ahumanperformanceeventevaluationwasinitiated(HPES90-021)andappropriatedisciplinaryactionwastaken.5.Thisfailureoccurredduringaperiodofinoperabilitypreviouslyscheduledformaintenanceactivities.6.Thesurveillancetestintervalremainedat31days.7.ThesurveillancetestintervalwasinaccordancewiththescheduleofTechnicalSpecificationTable4.8-1.Page6of6 CI+>>