ML17264A730

Part 21 Rept Re Defective 350 HP,1800 RPM,460 VAC,3 Phase, 5006P Frame,1.15 Sf,Vertical Hollow Shaft Motor Used as Service Water Pump motor.Safety-Relayed Cgiee Revised to Enhance Steps for Exam of Windings & Workmanship

ML17264A730
Person / Time
Site:	Ginna
Issue date:	11/06/1996
From:	MECREDY R C ROCHESTER GAS & ELECTRIC CORP.
To:	VISSING G S NRC (Affiliation Not Assigned)
References
REF-PT21-96 NUDOCS 9611150001
Download: ML17264A730 (8)

Text

CATEGORY1REGULAT~.INFORMATION DISTRIBUTION STEM(RIDS)ACCESSION NBR:9611150001 DOC.DATE:

96/11/06NOTARIZED:

NOFAOIL:50-244 RobertEmmetGinnaNuclearPlant,Unit1,Rochester GAlpH.NAMEAUTHORAFFILIATION MECREDY,R.C.

Rochester Gas6ElectricCorp.RECIP.NAME RECIPIENT AFFILIATION VISSING,G.S.

SUBJECT:

Part21reptredefective 350HP,1800RPM,460VAC,3phase,5006PFrame,l.15 SF,vertical hollowshaftmotorusedasservicewaterpumpmotor.Safety-Relayed CGIEErevisedtoenhancestepsforexamofwindings&workmanship.

DISTRIBUTION CODE:IE19TCOPIESRECEIVED:LTR 1ENCL(SIZE:TITLE:,Part 21Rept(50DKT)NOTES:License Expdateinaccordance with10CFR2,2.109(9/19/72).

DOCKETI0500024405000244GRECIPIENT IDCODE/NAME PD1-INTERNAILECENTENRRDRMPECBRES/DSIR/EIB RGN2RGN4COPIESLTTRENCL111111111111RECIPIENT IDCODE/NAME VISSING,G.

NRR/DISP/PSIB/B PDRWARD,M.RGN1RGN3COPIESLTTRENCL11111111110EXTERNAL:

INPORECORDCTRNRCPDR1111NOACSILVER,ENUDOCSFULLTXT1111~>"tt~Jyg ENNOTETOALL"RIDS"RECIPIENTS:

PLEASEHELPUSTOREDUCEWASTE.TOHAVEYOURNAMEORORGANIZATION REMOVEDFROMDISTRIBUTION LISTSORREDUCETHENUMBEROFCOPIESRECEIVEDBYYOUORYOURORGANIZATION, CONTACTTHEDOCUMENTCONTROLDESK(DCD)ONEXTENSION 415-2083FULLTEXTCONVERSION REQUIREDTOTALNUMBFROFCOPIESREQUIRED:

LTTR15ENCL15 Cr ANDROCHESTER GASANDEIECTRICCORPORATION

~89EASTAVEMIJE, ROCHESTER, N.Y146d9-0001 AREACODE7I65'-2700ROBERTC.MECREDYVicePresident NuclearOperations November6,1996U.S.NuclearRegulatory Commission DocumentControlDeskAttn:GuyS.VissingProjectDirectorate I-1Washington, D.C.20555

Subject:

10CFRPart2130DayReportR.E.GinnaNuclearPowerPlantDocketNo.50-244

DearMr.Vissing:

Inaccordance with10CFRPart21,Rep'orting ofDefectsandNoncompliance, Section21(d)(3)(ii),whichrequires"Writtennotification totheNRC...ontheidentification ofadefectorfailuretocomply",theattached10CFR21reportisherebysubmitted.

VelyyoursRobertC.Meedyxc:Mr.GuyS.Vissing(MailStop14C7)ProjectDirectorate I-1Washington, D.C.20555RegionalAdministrator U.S.NuclearRegulatory Commission RegionI475Allendale RoadKingofPrussia,PA19406GinnaSeniorResidentInspector

~ConqiXS<5000i VS,XX06PDRADOCK050002448PDR 10CFR2130DAYWRITTENREPORTPage2I.NAMEANDADDRESSOFTHEINDIVIDUAL INFORMING THECOMMISSION:

NAME:RobertC.MecredyVicePresident NuclearOperations ADDRESS:Rochester Gas&ElectricCorporation 89EastAvenueRochester, NewYork14649II.IDENTIFICATION OFTHEFACILITY, THEACTIVITY, ORTHEBASICCOMPONENT SUPPLIEDFORSUCHFACILITYWHICHFAILSTOCOMPLYORCONTAINSADEFECT:ThefacilityistheR.E.GinnaNuclearPowerPlant.Thebasiccomponent isa350HP,1800RPM,460VAC,3phase,5006PFrame,1.15SF,verticalhollowshaftmotorforuseasaServiceWater(SW)pumpmotor.Thiscomponent wasinstalled attheR.E.GinnaNuclearPowerPlanttoupgradethemotorforthe"A"SWpumpfroma300HPtoa350HPmotor.(The"A"SWpumpwasneverdeclaredoperablewiththisdefective motorinstalled.)

III.IDENTIFICATION OFTHEFIRMCONSTRUCTING THEFACILITYORSUPPLYING THEBASICCOMPONENT WHICHFAILSTOCOMPLYORCONTAINSADEFECT:Themotorwasacommercial-grade motormanufactured by:U.S.Electrical MotorsDivisionofEmersonElectricCo.8100W.Florissant Ave.POBox3946St.Louis,MO63136Themotorwasprocuredfrom:AuburnArmature, Inc.48CanogaSt.Auburn,NY13021Note:Thismotorwaspurchased commercial-grade, wascommercially-dedicated byRochester Gas&Electric, andsatisfied alltestingrequirements includedintheprocurement documents.

Page3~IV.NATUREOFTHEDEFECTORFAILURETOCOMPLYANDTHESAFETYHAZARDWHICHISCREATEDORCOULDBECREATEDBYSUCHDEFECTORFAILURETOCOMPLY:A350HPmotorwasinstalled onthe"A"SWpumpinJuly,1996.Post-modification functional testingrevealedunacceptable meggerreadings.

Themotorwasremovedfromthe"A"SWpump,disassembled andinspected.

Theinspection revealeddegradation ofmotorinsulation integrity duetodamagedmotorleads,whichcouldresultinthefailureofthemotorinservice.Theoverallqualityofthemotorwasbelowthatnormallyexpectedforacommercial grademotor.ThesafetyhazardwhichcouldbecreatedbysuchadefectisthecompletelossofServiceWater.Inthescenarioofthe"C"SWpumpoutofserviceandaconcurrent lossofpowertoBus17(whichsuppliespowertothe"B"and"D"SWpumps),alossofallSWwouldoccurifthe"A"SWpumpfailedtooperateduetotheidentified defect.V.THEDATEONWHICHTHEINFORMATION OFSUCHDEFECTORFAILURETOCOMPLYWASOBTAINED:

Theinformation wasobtainedonAugust5,1996.VI.INTHECASEOFABASICCOMPONENT WHICHCONTAINSADEFECTORFAILSTOCOMPLY,THENUMBERANDLOCATIONOF'ALLSUCHCOMPONENTS INUSEAT,SUPPLIEDFOR,ORBEINGSUPPLIEDFORGINNASTATION:Therearefour(4)SWpumpslocatedintheScreenhouse BuildingatGinnaStation.A350HPmotorhadpreviously beenprocuredseparately.

Thismotorwasinstalled toupgradetheexisting300HPmotoronthe"D"SWpumpinAugust,1995.This350motorisofsimilardesigntothe3motorsdiscussed below,andwasalsomanufactured byU.S.Electrical Motors.Thismotorwastestedsatisfactorily andplacedinserviceinAugust,1995,andoperatedtrouble-free.

Asdiscussed below,thismotordidnotcontainadefect.Three(3)350HPmotors,manufactured byU.S.Electrical Motors,werepurchased atalaterdate(asagroup)forupgradeoftheexisting300HPmotorsonthe"A","B",and"C"SWpumps.Asdiscussed below,twoofthesethreemotorswerediscovered tobedefective.

Page4VI~~.THECORRECTIVE ACTIONWHICHHASBEEN,ISBEING,ORWILLBETAKEN;THENAMEOFTHEINDIVIDUAL ORORGANIZATION RESPONSIBLE FORTHEACTION;ANDTHELENGTHOFTIMETHATHASBEENORWILLBETAKENTOCOMPLETETHEACTION:Thefollowing corrective actionshavebeencompleted:

1.GinnaStationMaintenance personnel removedthedefective 350HPmotorfromthe"A"SWpump,andshippedthismotorandoneuninstalled 350HPmotortoanAppendixBmotorfacility.

Thesetwomotorsbothexhibited degradation ofmotorinsulation integrity.

Themotorsweretested,inspected, andconfirmed tobedefective.

Theywererefurbished bythemotorfacility, andreturnedtoGinnaStation.2.The"A"SWpumpremainedinoperable untiloneoftheaboverefurbished motorswasreinstalled andsatisfactorily testedinAugust,1996.3.Thesimilar350HPmotor,installed onthe"D"SWpumpinAugust,1995,hadshownnosignsofmotordegradation.

However,thismotorwasremovedfromthe"D"SWpumpinOctober,1996,andwasreplacedbytheotherrefurbished sparemotor.4.Thus,corrective actionwascompleted forthesetwodefective motorsinAugust,1996,andthesetworefurbished motorsweresubsequently installed onthe"A"and"D"SWpumps,andhavefulfilled operability testrequirements.

5~Electrical testingontheothertwo350HPmotorsdidnotindicateanydegradation ofthemotorinsulation integrity.

Nevertheless, asaconservative measure,theywereshippedtoanAppendixBmotorfacilityinOctober,1996,fordiagnostics andtroubleshooting.

Theseremaining two350HPmotorshavebeendisassembled, inspected, andtestedatanAppendixBmotorfacility.

Electrical testing,performed atthemotorfacility, achievedsatisfactory performance results,confirming thatthemotor(previously installed onthe"D"SWpump)wasoperablewhileinservice.However,someminordeficient conditions werenotedonbothmotors.Thesemotorswerealsorefurbished.

Theserefurbishments areconsidered tobeconservative corrective measureswhichinvolvedmotorreleading, insulation redipandbearingrework.Thefollowing corrective actionsarescheduled forcompletion byMarch,1997:Safety-related motorCommercial GradeItemEngineering Evaluations (CGIEE's) willberevisedtoenhancestepsfortheexamination ofwindingsandoverallworkmanship toensuremotorsareconstructed withacceptable quality.CGIEEpreparation guidelines willbeenhancedtoincorporate thelessonslearnedfromthesedefective motors.

F4s Page5~VIII.ANYADVICERELATEDTOTHEDEFECTORFAILURETOCOMPLYABOUTTHEFACILITY,

ACTIVITY, ORBASICCOMPONENT THATHASBEEN,ISBEING,ORWILLBEGIVENTOPURCHASERS ORLICENSEES:

1.Sourcesurveillance duringmotorassemblymayhavedetectedthisdefect.2.Adetailedphysicalinspection (ordisassembly) uponreceiptmayhavedetectedthisdefect.3.Completion ofcommercial dedication couldbedependent uponsatisfactory completion ofpost-modification functional testing.