ML17228A183

LER 93-006-00:on 930513,EDG 2B Inadvertently Started During Safeguards Relay Testing Due to Personnel Error.Personnel Performing Test Counseled on Communications & Safeguards Relay Testing Completed satisfactorily.W/930611 Ltr

ML17228A183
Person / Time
Site:	Saint Lucie
Issue date:	06/14/1993
From:	HURCHALLA J A, SAGER D A FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-93-157, LER-93-006, LER-93-6, NUDOCS 9306160342
Download: ML17228A183 (5)

Text

DOCKET05000389ACCELERATEDDOCQVIENTDISTRIBUTIONSYSTEMREGU~ORYINFORMATIONDISTRIBUT.SYSTEM(RIDE)!ACCESSIONNBR:9306160342DOC.DATE:93/06/14NOTARIZED:NOFACIL:50-389St.LuciePlant,Unit2,FloridaPower&LightCo.AUTH.NAMEAUTHORAFFILIATIONHURCHALLA,J.A.FloridaPower&LightCo.SAGER,D.A.FloridaPower&LightCo.RECIP.NAMERECIPIENTAFFILIATION

SUBJECT:

LER93-006-00:on930513,EDG2Binadvertentlystartedduringsafeguardsrelaytestingduetopersonnelerror.Personnel.performingtestcounseledoncommunications&safeguardsrelaytestingcompletedsatisfactorily.W/930611ltr.DISTRIBUTIONCODE:IE22TCOPIESRECEIVED:LTRENCLSIZE:TITLE:50.73/50.9LicenseeEventReport(LER),IncidentRpt,etc.NOTES:DRECIPIENTZDCODE/NAMEPD2-2LANORRIS,JINTERNAL:ACNWAEOD/DOAAEOD/ROAB/DSPNRR/DE/EMEBNRR/DRCH/HICBNRR/DRIL/RPEBNRR/DRSS/PRPBNRR/DSSA/SRXBRES/DSIR/EZBEXTERNAL:EG&GBRYCE,J.HNRCPDRNSICPOOREFW.COPIESLTTRENCL1111221122111111221111221111RECIPIENTIDCODE/NAMEPD2-2PDACRSAEOD/DSP/TPABNRR/DE/EELBNRR/DRCH/HHFBNRR/DRCH/HOLBNRR/DRPW/OEABNRR/DISASPLBREGLAZE02RGN2FILE01LSTLOBBYWARDNSICMURPHY,G.ANUDOCSFULLTXTCOPIESLTTRENCL11221111111111111111111111DDx$DNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACI'HEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.504-2065)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!DFULLTEXTCONVERSIONREQUIREDTOTALNUMBEROFCOPIESREQUIRED:LTTR32ENCL32 FPLJune.11,1993P.O.Box128,Ft.Pierce,FL34954-0128L-93-15710.CFR50.73U.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,D.C.20555Re:St.LucieUnit2DocketNo.50-389ReportableEvent:93-06DateofEvent:May13,1993InadvertentStartofthe2BEmerencDieselGeneiatorTheattachedLicenseeEventReportisbeingsubmittedpursuanttotherequirementsof10CFR50.73toprovidenotificationofthesubjectevent.Verytrulyyours,D.A.gerVicesidentSt.LuciePlantDAS/JJB/kwAttachmentcc:StewartD.Ebneter,RegionalAdministrator,USNRCRegionIISeniorResidentInspector,USNRC,St.LuciePlantDAS/PSL8932-93l5008'i'DRADOCK05000389SanFPLGroupcompanygl FP~.FocsTITTTsolMICFormSMPsstU.S.NUCLEARREGULATORYCOMMISSCNLICENSEEEVENTREPORT(LER)NTISWEOOIAIHEI$1ICS155EAIHEWACCS5ESINATEOIAACEHIEHIKSPONSEToCCINIYWTIHTITSSSOISIAWOHCCIIECTIISIIHOUESTl500ITISTarWAITICaANIIISISCNEWICTAAS5EHESISIATEToTICIHCaEISNEItEtarrSHNIAOEHEHTWINICHItCTTAIASIAICIENIIH55SATOHY~WAWSHHCW.OC5555!5NIITOTHEttOTWWTTUIIHOUCTESIRCIXCToIIS51515aTICEaHAHACEAEHTNAITAeaETesNHATToAOC5555SFACILITYNAME(1)St.LucieUnit2DOCKETNUMBER(2)PAGE305000389103'~()InadvertantStartofthe2BEmergencyDieselGeneratorDuringSafeguardsRelayTestingDuetoPersonnelErrorEVENTDATE(5)MONTHDAYYEARYEARISIALLERNUMBER(6)REPORTDATE(7)MONTHDAYYEARFACILITYNAMESN/ADOCKETNUMBER(S)05OTHERFACILITIESINVOLVED(8)0513939300600061493N/A05000POWERLEVEL(10)100OPERATINGMODE(9)X50.73(a)(2)(iv)20.402(b)20.405(a)(1)(i)20.405(c)50.36(c)(1)50.73(a)(2)(v)50.73(a)(2)(vii)20.405(a)(1)(ii)50.36(c)(2)50.73(a)(2)(viii)(A)50.73(a)(2)(viii)(B)50.73(a)(2)(x)20.405(a)(1)(iii)20.405(a)(1)(iv)20.405(a)(1)(v)50.73(a)(2)(i)50.73(a)(2)(ii)50.73(a)(2)(iii)LICENSEECONTACTFORTHISLER12THISREPORTISSUBMITTEDPURSUANTTOTHEREQUIREMENTSOF10CFR:Checkoneormoreofthefollowin(11)73.71(b)73.71(c)OTHER(SpecifyinAbstractbelowandinTextNRCForm366A)JamesA.Hurchalla,ShiftTechnicalAdvisorTELEPONENUMBERAREACODE407465-3550COMPLETEONELINEFOREACHCOMPONENTFAILUREDESCRIBEDINTHISREPORT13CAUSESYSTEMCOMPONENTMANUFAC-TURERREPORTABLETONPRDSCAUSESYSTEMCOMPONENTMANUFAC-REPORTABLETURERTONPRDSSUPPLEMENTALREPORTEXPECTED14IIIEXPECTEDMONTHDAYYEARSUBMISSIONDATE(15)YFS(Ifyes,completeEXPECTEDSUBMISSIONDATE)XNOABSTRACT(Limitto1400spaces.i.e.approximatelyfifteensingle-spacetypewrittenlines)(16)OnMay13,1993,at1920hourswithUnit2inMode1at100%power,InstrumentandControl(IBC)personnelwereperformingthe"EngineeredSafeguardsRelayTest"procedureOP2-0400053incoordinationwiththeUnit2Operatingcrew.Operationshadsetuptheinitialtestconditionsincludingcontrolisolationofthe2BEmergencyDieselGenerator(EDG)fromtheEngineeredSafetyFeaturesActuationSystem(ESFAS).InstrumentandControltechniciansthenconnectedamultifunctiontestmeteracrossanESFASrelaycontactwhichprovidesanEDGstartandinjectedatriptestsignaltocheckthiscircuit'sactuation.WhentheIRCsupervisordidnotobtainthedesiredresultsheinformedtheAssistantNuclearPlantSupervisorthatOperationspersonnelcould"reset"followingthetest.OperationsrestoredtheplanttonormalincludingtakingtheEDGnormal/isolateswitchesbacktothenormalpositiontherebyunisolatingthe2BEDGfromtheESFAS.Approximatelyoneminutelaterthe2BEDGstartedandperformedasexpectedforanautomaticsafeguardsactuation.The2BEDGwasimmediatelysecuredandthesafeguardsrelaytestingwasstoppedpendinginvestigationofwhytheEDGhadstarted.Therootcauseoftheunplannedstartofthe2BEDGwasduetopersonnelerror.Thel8CsupervisorintendedtoperformthetestagainandonlyintendedforOperationstoresettheESFASsignalstorestoretheinitialtestconditions.However,basedonpreviouscommunicationsfollowingeachtest,Operationsunderstoodtheresetrequestasthatthetestwascompleteandthattheycouldsecurefromthetestconditions.Acontributingfactorwasalackofproceduralguidanceforrepeatingorsecuringthetestconditions.Correctiveactions:1)Personnelperformingthetestwerecounseledoncommunications.2)Thesafeguardsrelaytestingwascompletedsatisfactorily.3)OP2-0400053willbechangedtoensuretestequipmentisremovedpriortorestoringplantequipment.4)AHumanPerformanceEnhancementReviewwasconductedandtheconclusionsincorporatedinthisreport.5)Trainingonthiseventwillbeprovidedforappropriateplantpersonnel.FPLFacsimIIeofNRCForm366(6-89)

FPLFttcCilrTIITolNRCFormS68($80)US.NUCLEARREGULATORYCOMMlSSIONLICENSEEEVENTREPORT(LER)'EXTCONTINUATtONJTTTITTVT0CAeNCtStNITIIICrtTNXNAIIINtCCTAIATT0IlNCTNrrIIICSKWXToCCINCTWITNTITSCCCTCAATTCNCCAICCTTCNICDXCTI10AIATlfCÃIWANTCOIANNICCAIATCNIINATXNISIINATC1000IKCCNTCAtDICTCITTCNANAtXINNTCNANCHTPCTttATANIAITACANIXCAAATTTTT~WANNICIOI,CCIOSSANCITOTIC&PINICTWCTAACTCNITTCtCCIplIACTOIACINCCorNAWATXINNTAI0MXXT,WANNNITDACCTNTCAFACILITYNAME(1)St.LucieUnit2DOCKETNUMBER(2)LERNUMBER(6)EQUENTIALREVISIONANUMBER.NUMBERPAGE(3)05000389TEXT(//morespaceisrequired,useadditionalNRCForm366A's)(17)93-006000203OnMay13,1993,at1920hourswithUnit2inMode1at100%power,InstrumentandControlpersonnelwereperformingthe"EngineeredSafeguardsRelayTest"procedureOP2-0400053incoordinationwiththeUnit2Operatingcrew.DuringtheperformanceofthisprocedureOperationsestablishedtheinitialtestconditionsandtheInstrumentandControlpersonnelperformedtherelayactuationandverification.Datasheet¹8ofOP2-0400053wasbeingperformedtotestthecababilityoftheNB"SafetyInjectionActuationSignaVContainmentIsolationActuationSignal(SIAS/CIAS)(EIIS:JE)relaytoprovideanEmergencyDieselGenerator(EDG)(EIIS:EK)startsignal.Operationshadfulfilledthepretestconditionsbyplacingthe2BEDGnormalfisolateswitchesintheisolatepositiontoisolatethatEDGfromthesafeguardsstartcircuitryduringthetesttominimizeunecessaryEDGstarts.TheInstrumentandControlpersonnelconnectedamultifunctiontestmeteracrosstheBSIAS/CIASrelaycontactandinjectedthetriptestsignaltoobtainactuation.WhentheInstrumentandControlsupervisordidnotobtainthedesiredresultsheinformedtheAssistantNuclearPlantSupervisor(ANPS)thatOperationspersonnelcould"reset"followingthetest.OperationsrestoredtheplanttonormalincludingtakingtheEDGnormalfisoiateswitchesbacktothenormalpositiontherebyunisolatingtheEDG.Duringthistimethetechnicianshadremovedthemeterfromthetestleadstoreplaceitwithadifferentmeterasaprecautionarymeasure.Theleadswereleftonthecontactsinanticipationofperformingthetestagain.SubsequenttotheEDGnormaVisolateswitchesbeingplacedtonormal,techniciansinstalledthenewmeteronthealreadyconnectedleads.The2BEDGstartedbutdidnotloadtothe2B34160VACbuswhichistheexpectedresponseforanautomaticsafeguardsactuationoftheEDGwithitssafetyrelatedbusenergized.The2BEDGwasimmediatelysecuredandthesafeguardsrelaytestingwasstoppedpendinginvestigationofwhytheEDGhadstarted.EEVTherootcauseofthe2BEDGstartingwasduetopersonnelerrorinvolvinginadequatecommunications.TheInstrumentandControlsupervisorintendedtoreperformthetestandonlyintendedforOperationstoresetthesafeguardssignalstorestoretheinitialtestconditions.However,basedoncommunicationsfollowingprevioustests,theANPSunderstoodtheresetrequestasmeaningthatthetestwascompleteandthattheycouldsecurefromthetestconditions.Thepropercommunicationshouldhaveincludedexactlywhatfunctionwastoberestoredandtheintenttoreperformthetest.Acontributingfactorwasthelackofexplicitproceduralguidancetoensurethattestequipmentwasnotinplacewhenrestoringequipment.Thetechnicianshadremovedthemeterfromthetestleadsbuthadnotnotremovedthetestleadsfromthecontactsincetheyexpectedtoperformthetestagain.Whenthe2BEDGnormal/isolateswitchwasrestoredtonormaltheBSIAS/CIASrelaywasnowcapableofprovidingastartsignaluponactuation.WhentheInstrumentandControltechnicianattachedthenewmetertothetestleadsitactedasajumperacrossthecontactprovidingastartsignal.Theproceduredoesnotstipulatethattestequipmentmustberemovedpriortoresettingactuationsignals,onlythepostteststatusofthenormalisolateswitchandthenotethattheEDGshouldnotbestarted.Thisallowsflexibilitywithintheproceduretoreperformtherelayactuationandverificationifrequiredwithouthavingtorestoreallequipmenttonormalandsetupinitialtestconditionsagain.TheprocedureshouldprecludeleavingtestleadsinplaceorrelandingthemuntilOperationshascommunicatedthatthetestmaybereperformed.Therewerenounusualcharacteristicsoftheworklocationwhichcontributedtothisevent.FPLFacsimileofNRCForm366(6-89)

,4FPLFleOTNACFafff%6t6efrftU.S.NUCLEARAEGULATOAYCOMMISSfONLICENSEEEVENTREPORT(LER)TEXTCONTINUATIONAffnofloanIClSlf0SlSIeffseLfosseCSTWATTTTTASTCOIfellfeSIONSeTOCaNCTWTNTTWSeaWAllCNCafeCTlafIeaeSTlTOSfnffofNIAITTCONASNTSINCNTCSTOTTAOCNeelWATSlollsfecaSTSANTWfaTTSNANAcefeNTSNANCNISSTIAITSIAICTSANIeaAATaTT~TTANwcfal.ccffsfeNoxoneTASNfwfcnffecucTTCNfnoecfTTIfssfoq,anceOf0ANAJJNNTNeTTNCCT,WASINNITOIAOCfffcSFACILITYNAME(1)St.LucieUnit2DOCKETNUMBER(2)LERNUMBER(6)YEARIEQUENTIAL'REVISIONINUMBERNUMBERPAGE(3)05000389TEXT(lfmorespaceisrequired,useadditionalNRCForm366A's)(17)93006000303Thiseventisreportableunder10CFR50.73.a.2.ivasaneventorconditionthatresultsinamanualorautomaticactuationofanyEngineeredSafetyFeature.Theinadvertantstartingofthe2BEmergencyDieselGenerator(EDG)hadnoadverseconsequencesontheplantbecausethe2B34160VACBusremainedenergizedandinserviceduringthisevent,suppliedbyitsnormaloffsitepowersupplysource.The2BEDGperformedasexpectedforanautomaticstartfromaSafetyInjectionActuationSignalactuation.TherewasnomalfunctionoftheEngineeredSafetyFeaturesoroftheEDGstartcircuitryduringthisevent.Therefore,thehealthandsafetyofthepublicwerenotaffectedatanytimeduringthisevent.1)Theutilitypersonnelinvolvedinthiseventwerecounseledoncommunicationsandthenecessityofensuringthattestequipmentisnotinstalledwhensecuringfromatest.2)Upondeterminingthecauseoftheeventthesafeguardsrelaytestingwasresumedandcompletedsatisfactorilythenextday.3)TheNSafeguardsRelayTest"(OP2-0400053)procedurewillbechangedtoensurethattestequipmentshallberemovedpriortooperationsresettinganyactuationsorrestoringanyequipmenttonormaloperatingstatus.ThistestisnotperformedonUnit1.4)AHumanPerformanceEnhancementReviewofthiseventwasperformedandtheresultingconclusionshavebeenintegratedintherootcausedeterminationandcorrectiveactions.5)Trainingwillbeprovidedfortheappropriateplantpersonnelonthiseventandonenhancingcommunicationstopreventfutureoccurrence.NoneLER335-93-003Nlnadvertantstartofthe1BDieselGeneratorduetopersonnelerror"LER335-88-005Nlnadvertantstartofthe1ADieselGeneratorduringtroubleshootingduetopersonnelerror"FPLFacsimileofNRCForm366(6-89)