ML17265A403

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Part 21 Rept Re W DB-75 Circuit Breakers W/Missing Tripper Bar Tabs.Caused by Intermittent Failure to Close in DB-75 B EDG Supply Circuit Breaker to Bus #16.Licensee Nuclear Engineering Personnel Are Performing Vendor Document Review
ML17265A403
Person / Time
Site: Ginna Constellation icon.png
Issue date: 08/12/1998
From: MECREDY R C
ROCHESTER GAS & ELECTRIC CORP.
To:
NRC
References
REF-PT21-98 NUDOCS 9808170270
Download: ML17265A403 (14)


Text

CATEGORY1REGULATYINFORMATIONDISTRIBUTIOYSTEM(RIDS)ACCESSIONNBR:9808170270DOC.DATE:98/08/12NOTARIZED:NOFACIL:50-244Robert'mmetGinnaNuclearPlant,Unit1,RochesterGAUTH.NAMEAUTHORAFFILIATIONMECREDY,R.C'.RochesterGas&ElectricCorp.RECIP.NAMERECIPIENTAFFILIATIONNRC-NoDetailedAffiliationGivenDOCKET05000244

SUBJECT:

Part21reptreWDB-75circuitbreakersw/missingTripperBarTabs.CausedbyintermittentfailuretocloseinDB-75"B"EDGsupplycircuitbreakertoBUS516.LicenseeNuclearEngineeringpersonnelareperformingvendordocumentreview.DISTRIBUTIONCODE:IE19TCOPIESRECEIVED:LTR)ENCLLSIZE:TITLE:Part21Rept(50DKT)NOTES:LicenseExpdateinaccordancewith10CFR2,2.109(9/19/72).E05000244GRECIPIENTIDCODE/NAMEPD1-1PDCOPIES9RECIPIENTLTTRENCLIDCODE/NAME11VISSING,G.COPIESLTTRENCL11INTERNAL.NRR/DRPM/PECB/BRES/DET/EIBRGN2RGN41'1,1111111NRR/DRPM/PECBPDRWARD,M.RGN1RGN311111111EXTERNAL:INPORECORDCTRNRCPDR1111NOACSILVER,ENUDOCSFULLTXT1111D0THINGOOQuMpgyHAsBEENscANN8lPENNOTETOALLNRIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE.TOHAVEYOURNAMEORORGANIZATIONREMOVEDFROMDISTRIBUTIONLISTSORREDUCETHENUMBEROFCOPIESRECEIVEDBYYOUORYOURORGANIZATION,CONTACTTHEDOCUMENTCONTROLDESK(DCD)ONEXTENSION415-2083FULLTEXTCONVERSIONREQUIREDTOTALNUMBEROFCOPIESREQUIRED:LTTR15ENCL15

AUG-12-199814:89GIHHASTATION.7167713988P.82r85AhlPROCHESTERGASANDELECTRICCORPORATION89EASTAVENUE.ROCHESTER,'NY.146490001AREACOOE116.S46.2700ROBERTC,MECREDY~i+Q~f~vl'8/hiHvcleorOpamlionsAugust121998U.S.NuclearRegulatoryCommissionOperationsCenterFacsimileNumber301-816-5151TelephoneNumber301-816.5100

Subject:

InitialNotificationof10CFRPart21'DefectR.E.QinnaNuclearPowerPlantDocketNo.50-244Inaccordancewith10CFRBart21,ReportingofDefectsandNoncompliance,Section21(d)(3)(i),whichrequires"Initialnotificationbyfacsimile",theenclosedinitialnotificationisprovided.Nrittennotification,inaccordancewith10CFRpart21,Section21(d)(3)(ii),willbepravide4bySeptember11,1998.Vertrulyyours,RobertC.MecredEnclosures'TerryA.WhiteManager,Operations+chesterGasandElectricCorporationR.E.GinnaNuclearPowerPlant1503LakeRoadOntario,N.Y.14519Phone:(716)771-3667Fax:(716)771-39019808170270980812PDRADOCK05000244SPDajemail:'IhrryWhitedgmail.zI,e.corn L

AUG-12-199814:89INNASTATION7167713988P,83r85)10CFR21INITIALFACSIMILENOTIFICATIONPage1Z.NAMEANDADDRESSOFTHEINDIVIDUALINFORMINGTHECOMMXSSXON:NAMEADDRESSRobertC.MecredyVicePresidentNuclearOperationsGroupRochesterGas6.ElectricCorporation89EastAvenueRochester,NewYork14649XX.III.IV.IDENTIFICATIONOFTHEFACILITY,THEACTIVITY~.ORTHEBASICCOMPONENTSUPPLZEDFORSUCHFACILITYWHICHFAILSTOCOMPLYORCONTAINSADEFECT:ThefacilityistheR.E.GinnaNuclearPowerPlant.ThebasiccomponentisaWestinghouseDB-75circuitbreaker.ThiscomponentwasinstalledinaClass1ESafetyRelatedBus.Thebreakeristhe'B'ieselGeneratorSupplybreakertoBus16(SafetyRelatedBus).IDENTIFICATIONOFTHEFIRMCONS'gRUCTZNGTHEFACILITYORSUPPLYINGTHEBASICCOMPONENTWHICHFAILSTOCOMPLYORCONTAINSADEFHCT-'hebreakerismanufacturedby:WestinghouseElectricCorporationNuclearServicesIntegratedDivision.Box78Pittsburgh,PA15230-oo78NATUREOFTHEDEFECTORFAILURETOCOMPLYANDTHESAFETYHAZARDWHICHISCREATEDORCOULDBECREATEDBYSUCHDEFECTORFAILURETOCOMPLY:TheDB-75breakerwasretrofittedwithanAMPTECTORsolidstatetripunitperWestinghouseinstructionZ.B.33-850-6thatinstructedthetechniciantoremovealltripperbartabsfromthetripperbar.Subsequentlytheinstructionbulletinwasrevisedtospecifically.leavethecentertripperbartabinstalled.Therewerenonotificationstotheplanttore-installthecentertripperbartabsonpreviouslymodifiedbreakers,Theabsenceofthecentertripperbartaballowedtwotripperbarbushingstofallfromtheirhousingandisbelievedto,overtime,bendthetripperbarsothatitwouldnotfullyreset.ThefailureofthetripperbartofullyresetcausedintermittentfailuretocloseontheDB-75~B'ieselgeneratorsupplybreakertoSafetyRelatedBus16.Withtheidentifieddeficiencyinthe'B'ieselGeneratorsupplybreakeritispossiblethatasinglefailurecouldrenderbothsafetytrainsincapableofperformingtheirsafetyfunctions(buses14and16).Thisdeficiencyconstitutesasubstantialsafetyhazard.I Cf rQ'UG-12-199814:89GINNASTAT10N7167713988P.84r85IV.THEDATEONWHICHTHEINFORMATIONOFSUCHDEFECTORFAILURETOCOMPLYWASOBTAINED:TheinformationwasobtainedonJuly27,1998afterdiscussionswithWestinghouserepxesentatives.ThemissingtripperbartabswerediscoveredMarch25,1998duringtroubleshootingofthelatestfailure.ThemethodofnotificationbythevendorwasnotdetermineduntilJuly27,1998.VX.XNTHECASEOFABASICCOMPONENTWHICHCQNTAXNSADEFECTORFAXLSTOCOMPLY,THENUMBERANDLOCATIONOFALLSUCHCOMPONENTSINUSEATISUPPLIEDFOR~ORBEINGSUPPLIEDFORGINNASTATXON:TherearesixWestinghouseDB-75breakersinstalledatGinnainsafeguardsbusses14and16.ThereisalsooneSafetyRelatedsparebreaker.TheBus14and16SafetyRelatedbusfeedsandthetwo(2)bustiebreakersbetweenBuses14and16wexecorrectlymodifiedpertherevisedinstructions.TheoriginalSpareDB-75breakerwasalsocorrectlymodifiedpriortobeinginstalledintothe'A'ieselGeneratorsupplybreakerposition.Between3/85and2/88the'B'ieselGeneratorsupplybreakerwasinstalledwiththeincorrectmodification.Xn2/88theDB-75breakerinstalledinthe'A'ieselGeneratorsupplybreakeronBus14,wasincorrectlymodifiedinthe.samemannerasthe'B'ieselGeneratorsupplybreaker.Between2/88and5/96bothDieselGeneratoroutputbreakerstoBus14and16wereinstalledwithincorxectmodifications.In5/96thespareDB-75breaker,96-.04,wasinstalledinthe'A'ieselGeneratorsupplybreakerposition.Breaker96-04wasmodifiedcorrectlyperthecurrentrevisionoftheinstallationinstructions.Althoughthepotentialforfailureexisted,thebreakersweretestedwithregularsurveillanceteststopxoveoperabilityandthefailuremechanismisofthenaturethatdegradesovertime.Themissingtripperbaxtabwouldnotimmediatelyfailthebreakeruponremoval.

V.RUG-1'2-199S14:18INNASTATIONVI'I~THECORRECTIVEACTIONWHICHHASBEEN)XSBEING)ORWILLBETAKEN;THENAMEOFTHElNDXVIDUALORORGANIZATIONRESPONSZBLEFORTHEACTION;ANDTHELENGTHOFTIMETHATHASBEEN,ORWILLBETAKENTOCOMPLETETHEACTION:AllDB-'75breakerswereinspectedatthepointthemissingcentertrippexbartabwasdiscovered-Maintenancepersonnelinstalledcentertripperbartabsonthe'B'ieselGeneratorsupplybreakerandSparebreaker,previouslyinstalledinthe'A'iesel'Generatorsupplybreakerposition.Nuclearengineeringisperformingavendordocumentreviewwhichisinitsfinalstages.Thereviewwillverifyallbreakersareproperlyconfiguredperapplicablevendordocumentation.Theresultsofthereviewisbeingincorporatedintomai'ntenanceprocedures.AllcorrectiveactionsarescheduledtobecompletedbyDecember31,1998.'XXI.ANYADVXCERELATEDTOTHEDEFECTORFAILURETOCOMPLYABOUTTHEFACILITY,ACTIVITY,ORBASICCOMPONENTTHATHASBEEN,ISBEING,ORWILLBEGIVENTOPURCHASERSQRLICENSEES:Thetripperbartabinstallationisverifiedbyvisualinspection,possiblewiththebreakerinservice.Anindustrynotificationwasdistributedatthetimethetripperbartabvasdiscoveredtobeimproperlymodified.

t ePOWERREACTOREVENTNUMBER:34632FACILITY:GINNAUNIT:[1][][RKTYPE:[1]W-2-LPNRCNOTIFIEDBY:BOBMECREDYHQOPSOFFICER:DICKJOLLIFFEREGION:1STATE:NYNOTXFICATIONDATE:08/12/98NOTIFICATIONTIME:14:10[ET]EVENTDATE:07/27/98EVENTTIME:12:00[EDT]LASTUPDATEDATE:08/12/98.NOTIFICATIONSEMERGENCYCLASS:NOTAPPLICABLE10CFRSECTION:CDEG21.21(c)(3)(i)DEFECTS/NONCOMPLIANCEDAVIDSILK,R1RDOEDWARDMcALPINE,R2RDOMARKRING,R3RDO'ARYSANBORN,R4RDOVERNHODGENRRUNXTSCRAMCODERXCRITINITPWRINITRXMODECURRPWRCURRRXMODENY100POWEROPERATION100POWEROPERATIONEVENTTEXT10CFR21-WESTINGHOUSEDB-75CIRCUITBREAKERSWITHMISSINGTRIPPERBARTABSTHEREARESIXWESTINGHOUSEDB-75CIRCUITBREAKERSINSTALLEDATGINNAINSAFEGUARDSBUSES¹14AND¹16ANDONEUNINSTALLEDSAFETYRELATEDSPARE.ON03/25/98,DURINGTROUBLESHOOTINGACTIVITIES,THELICENSEEDISCOVEREDTHATTHECENTERTRIPPERBARTABSWEREMISSINGFROMAWESTXNGHOUSEDB-75CIRCUITBREAKERINSTALLEDINTHE'B'MERGENCYDIESELGENERATOR(EDG)SUPPLYCIRCUITBREAKERTOTHECLASS1ESAFETYRELATEDBUS¹16ATGXNNA.PRIORTO03/25/98,GINNAMAINTENANCETECHNICIANSHADRETROFITTEDTHE'B'DGDB-75SUPPLYCIRCUITBREAKERWITHANAMPTECTORSOLIDSTATETRIPUNITPERWESTINGHOUSEINSTRUCTIONI.B.33-850-6THATINSTRUCTEDTHETECHNICIANSTOREMOVEALLTRIPPERBARTABSFROMTHETRIPPERBAR.SUBSEQUENTLY,THEWESTINGHOUSEXNSTRUCTIONBULLETINWASREVISEDTOSPECIFICALLYLEAVETHECENTERTRIPPERBARTABINSTALLED.THEREWERE0NOWESTINGHOUSENOTIFICATIONSTOGINNATOREINSTALLTHECENTERTRIPPERBARTABSONPREVIOUSLYMODIFIEDDB-75CIRCUITBREAKERS.THEABSENCEOFTHECENTERTRIPPERBARTABALLOWEDTWOTRIPPERBARBUSHINGSTOFALLFROMTHEIRHOUSINGANDISBELIEVEDTO,OVERTIME,BENDTHETRIPPERBARSOTHATITWOULDNOTFULLYRESET.THEFAILUREOFTHETRIPPERBARTOFULLYRESETCAUSEDTHEINTERMITTENTFAILURETOCLOSEONTHEDB-75'B.'DGSUPPLYCIRCUITBREAKERTOBUS¹16.WITHTHEIDENTIFIEDDEFICIENCYINTHEBEDGSUPPLYCIRCUITBREAKERFITISPOSSIBLETHATASINGLEFAILURECOULDRENDERBOTHSAFETYTRAINSINCAPABLEOFPERFORMINGTHEIRSAFETYFUNCTIONS(BUSES()16AND()16)~g"/00of(Continuedonnextpage)

~Ch V'~PFACILITY:GINNAPAGEg2OFEVENTNUMBER:34632THISDEFICIENCYCONSTITUTESASUBSTANTIALSAFETYHAZARD.BETWEENMAR85ANDFEB88,THEDB-75'B'DGSUPPLYCIRCUITBREAKERWASINSTALLEDWITHTHEINCORRECTMODIFICATION.INFEB88,THEDB-75CIRCUITBREAKERINSTALLEDINTHE'A'DGSUPPLYBREAKERONBUSg14WASINCORRECTLYMODIFIED.INTHESAMEMANNERASTHE'B'DGSUPPLYCIRCUITBREAKER.BETWEENFEB88ANDMAY96,BOTHEDGOUTPUTCIRCUITBREAKERSTOBUSESN.4AND516WEREINSTALLEDWITHTHEINCORRECTMODIFICATIONS.INMAY96,THEORIGINALSPAREDB-75CIRCUITBREAKER,f96-04,WASINSTALLEDINTHE'A'DGSUPPLYBREAKERPOSITION.CIRCUITBREAKER596-04HADBEENMODIFIEDCORRECTLYPERTHECURRENTREVISIONOF,THEWESTINGHOUSEINSTALLATIONINSTRUCTIONSPRIORTOBEINGINSTALLEDINTOTHE'A'DGSUPPLYCIRCUITBREAKERPOSITION.ON,03/25/98,THELICENSEEINSPECTEDALLWESTINGHOUSEDB-75CIRCUITBREAKERSATGINNA.PLANTMAINTENANCETECHNICIANSINSTALLEDCENTERTRIPPERBARTABSONTHE'B'DGSUPPLYCIRCUIT'BREAKERANDTHESPARECIRCUITBREAKER,PREVIOUSLYINSTALLEDINTHE'A'DGSUPPLYCIRCUITBREAKERPOSITION.THEDB-75CIRCUITBREAKERSONBUSESg14AND416ANDTHETWOBUSTIECIRCUITBREAKERSBETWEENBUSES514ANDg16HADBEENCORRECTLYMODIFIEDPERTHEREVISEDWESTINGHOUSEINSTRUCTIONS.ALTHOUGHTHEPOTENTIALFORFAILUREEXISTEDATGINNA,THEWESTINGHOUSEDB-75CIRCUITBREAKERSWERETESTEDWITHREGULARSURVEILLANCETESTSTOPROVEOPERABILITYANDTHEFAILUREMECHANISMISOFTHENATURETHATDEGRADESOVERTIME.THEMISSINGTRIPPERBARTABWOULDNOTIMMEDIATELYFAILTHECIRCUIT.BREAKERUPONREMOVAL.1LICENSEENUCLEARENGINEERINGPERSONNELAREPERFORMINGAVENDORDOCUMENTREVIEWTOVERIFYTHAT.ALLWESTINGHOUSEDB-75CIRCUITBREAKERSAREPROPERLYCONFIGUREDINACCORDANCEWITHAPPLICABLEVENDORDOCUMENTATION.ALLLICENSEECORRECTIVEACTIONSARESCHEDULEDTOBECOMPLETEDBY12/31/98.ON03/25/98,THELICENSEEDISTRIBUTEDANOTIFICATIONOFTHISCONDITIONTOINDUSTRYREPRESENTATIVES.THECENTERTRIPPERBARTABINSTALLATIONCANBEVERIFIEDBYVISUALINSPECTION,POSSIBLYWHILETHECIRCUITBREAKERISINSERVICE.SPECIFICINFORMATIONFORTHISREPORTWASOBTAINEDDURINGDISCUSSIONSWITHWESTINGHOUSEREPRESENTATIVESON07/27/98.THELICENSEEPLANSTOSUBMITAWRITTEN10CFR21REPORTOFTHISCONDITIONTOTHENRCBY09/11/98.

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