ML17223A214

LER 89-004-00:on 890605,leak Rate on Containment Penetration 10 Exceeded Allowance,Per Tech Spec 4.6.1.7.3. Caused by Personnel Error.Technical Manual Change Request submitted.W/890705 Ltr

ML17223A214
Person / Time
Site:	Saint Lucie
Issue date:	07/05/1989
From:	HOLIFIELD C D, WOODY C O FLORIDA POWER & LIGHT CO.
To:
References
L-89-238, LER-89-004-02, LER-89-4-2, NUDOCS 8907120017
Download: ML17223A214 (5)

Text

REGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:8907120017DOC.DATE:89/07/05NOTARIZED:NOFACIL:50-389St.LuciePlant,Unit2,FloridaPower&LightCo.AUTH.NAME'UTHORAFFILIATIONHOLIFIELD,C.D..FloridaPower&LightCo.WOODY,C.O.FloridaPower&LightCo.RECIP.NAME'RECIPIENTAFFILIATION

SUBJECT:

LER89-004-00:on890605,containmentlocalleakrateexceedsTSduetovalveclosurestopoutofadjustment.DISTRIBUTIONCODE:IE22TCOPIESRECEIVED:LTRENCLSIZE:TITLE:50.73/50.9LicenseeEventReport(LER),ncidentRpt,etc.t~tNOTES'OPIESLTTRENCL1111COPIESLTTRENCL11RECIPIENTIDCODE/NAMEPD2-2LANORRIS,JRECIPIENTIDCODE/NAMEPD2-2PDINTERNAL:ACRSMICHELSON.ACRSWYLIEAEOD/DSP/TPABDEDRONRR/DEST/ADE,8HNRR/DEST/CEB8HNRR/DEST/ICSB7NRR/DEST/MTB9HNRR/DEST/RSB8ENRR/DLPQ/HFB10NRR/DOEA/EAB11NUDOCS-ABSTRACTRES/DSIR/EIBRGN2FILE011111'11111111111111111,.111ACRSMOELLER'EOD/DOAAEOD/ROAB/DSPIRM/DCTS/DABNRR/DEST/ADS7ENRR/DEST/ESB8DNRR/DEST/MEB9HNRR/DESTOPSB8DNRR/DEST/SGB8DNRR/DLPQ/PEB10NRR~REP/PB10REG02RES/DSR/PRAB22112'21'10111111"1111221.111DOCKET05000389RIDDDEXTERNALEG&GWILLIAMSgSLSTLOBBY'WARDNRCPDRNSICMURPHYgGA4411111'FORDBLDGHOY,ALPDRNSICMAYS,GD'SNOIR'ZOALLRIDS"R1KXEKENIS:EEZASEHELPUS'IOREDOCE%ASTH!CGMIRCZGHE1XXUMEÃZCDÃGRLDESK,RXNP1-37(EZT.20079)KlEKaIHQQZBACRNAHBPKHDI895GEPXXQNLISTSEQRDOCUMEÃISYOUDCSERTNERD!FULLTEXTCONVERSIONREQUIREDTOTALNUMBEROFCOPIES.REQUIRED:LTTR43ENCL42DD P.O.Box14000,JunoBeach,FL33408.0420JULY,51989L-89-23810CFR50.73U.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,D.C.20555Gentlemen:Re:St.LucieUnit2DocketNo.50-389ReportableEvent:89-04DateofEvent:'June5,1989ContainmentLocalLeakRateExceedsTechnicalSpecificationsDuetoValveClosureStoOutofAd'ustmentDuetoPersonnelErrorTheattachedLicenseeEventReportisbeingsubmittedpursuanttotherequirementsof10CFR50.73toprovidenotificationofthesubjectevent.Verytrulyyours,.C.0.WoActingniorVicePresident-NuclearCOW/JRH/cmAttachmentcc:StewartD.Ebneter,RegionalAdministrator,RegionII,USNRCSeniorResidentInspector,USNRC,St.LuciePlant/-:907120017S9070PDRADGCK05000389PDCallIlla>><I NRCfornr34494)31LICENSEEEVENTREPORT{LER)U.S.NUCLEARREOULATORYCOMMISSIONAPPROVEDOMSNO,3150410CEXPIRES,'~/31/$5FACILITYNAMElllSt.Lucie,Unit2OOCKEtNUMSER(2)osooo38PAOI1OFTITLE<<)Contaqnmenoca+aaexceesecnacapeericanClosureStoputofAdjustmentDuetoPersonnelErrorEVENTDATE(5ILERNUMSER(5)REtORTDATE(7)OTHERFACILITIESINVOLVEDISIMONTeDAYYEARYEARS40u4N7IAI.NVMSSA"SYR~MONTHOAYNVMSSRYEARFACILITYNAMESN/AOOCRETNuMEER(s>050000598900400078905000OPS.AT(NO1MODE(~I~DIVERypp(10)20.402(4)20A05(~)(IIIII20.405(~)(Il(4)20AOS(~I(Il(ryl)20A05(eIllIIItI20A05(cIIll(yl20AOS(cl50.$5(~)Ill50.35(c)LTI50.73(~I(2(III50.7$(e)(2)(4)50.73(el(21(9(lLICENSEECONTACTFORTHISLER02)50.7$(el(2)IN)50.7$(e)12)(y)50.7$(el(2)(or()50.7$(cl(2)(ySI)(AI50.73(e)12)(y(4)(~I50.7$(~l(2)(el0THEREOUIREMENTSOF10CfR(IrIChtcetiltoririoi'0/lhtltr/owrnf/IllTHISREPORTISSUSMITTEOtuRSUANTT7$.71(~I7$.71I~I0'tHERISotciryinicollrtclOt/OryendinTtet,NRCFOnn3FFllNAMECharlesD.Holifield,ShiftTechnicalAdvisorTELE/NONENUMSERAREACODE407465-35pCOMPLETEONELINEFOREACHCOMPONENTFAILUREDESCRI~EOINTHISREtOR'T(1$lCAUSESYSTEMCOMPONENTMANUFAC.TVRERftORtASLETONPROSYACAVSfSYSTEMCOMtONENTMANVFACTVREREPORTASLETONPROSSuttLEMKNTALRftORTEXtECTEO(1iuEXPECTEDSUSMISSIONDATEUSIMONTiiOAVYEARYESIIIyn,CtetrtrtEXPECTEDSUSMISSIOAIDATE/NOASSTRACTILieitlolc00roectl,I~,,toproeietltryIrlletnpetitIotctcyotwn(NnrinNIll~IOnJune5,1989,at1220,withUnit2inMode1at,100%power,aroutinelocalleakratesurveillancetestwasperformedonContainmentPenetration10.Thispenetration,whichcontainstheexhaustlinefortheContainment.PurgeSystem,issubjecttoTypeCtestingandrevealedan"as-found"leakagerateacrossFCV-25-5inexcessof3,171,840standardcubiccentimetersperminute(SCCM).Thisleakagerateisinexcessoftheallowableleakageof.05La,or48,500SCCM,asperTechnicalSpecification4.6.1.7herootcauseofthehighmeasuredleakagewaspersonnelerrorinthatthevalveadjustmentstopwasnotproperlylockeddownbycontractorpersonnelwhenthevalvewaspreviouslyadjusted.Acontributingfactorwaslackofguidanceinthetechnicalmanualonhowtotightentheadjustmentscrewlocknut.CorrectiveactionsincludedconfirmingthatthefusesforFCV-25-6(asecondvalveinthecontainmentpurgeexhaustline)werepulled,leaktestingFCV-25-6,adjustingandlockingdownthestopforclosingofFCV-25-5,andre-testingFCV-25-5,withsatisfactoryresults.Atechnicalmanualchangerequestwillalsobesubmitted.NRCfore344/953~

NRCForm3SSA(943(LICENSEEEVENTREPORTtLER)TEXTCONTINUATIONU.S.NUCLEARRECULATORYCOMMISSICAPPROVEDOMBNO,3150-0(04EXPIRES.'8/31/88FACILITYNAME((IDOCKETNUMBER(2(LERNUMBER(SI~YEAR>>MSECUCNTIAIIN/INUMBERRCvrsroNNUMSC/I~ACE(3)St.Lucie,Unit2TEXTllfmoresrreseiseorrired,rrsosddrdorro/HRC%%drm3/(SA's/((TIosooo89-0040002oF03DESCRIPTIONOFTHEEVENTOnJune5,1989,at1220,withUnit.2inMode1at1004power,aroutinelocalleakratesurveillancetestonContainmentPenetration10revealedaleakagerateacrossFCV-25-5(EIIS:ISV)inexcessof3,171,840StandardCubicCentimetersperMinute(SCCM)whichisthecapacityofthetestequipment.Penetration10containsa48inchexhaustlinefortheContainmentPurgeSystem,withthreebutterflyvalves,twoofwhich(FCV-25-4andFCV-25-5)aresubjecttoTypeCtesting,asperUnit2TechnicalSpecification3.6.1.2.b,Table3.6.-1andSurveillance4.6.1.7.3.LocalleakratetestingisperformedbypressurizingthepipingbetweenFCV-2S-4andFCV-25-5.Testinstrumentationisconnectedtoatesttapbetweenthetwovalves,andthechangeinpressureovertimeisrecordedandusedtocalculatetheleakagerate.Theas-foundleakageofthepenetrationwasinexcessoftheallowableleakageof.05La,or48,500SCCM.InaccordancewithTechnicalSpecification3.6.1.1.7,actionwasundertakentorestoretheleakageratetowithinthespecifiedlimitwithin24hours.AlsoinaccordancewithTechnicalSpecification3.6.3.,thefusesonFCV-25-6,anadditionalvalve.inserieswithFCV-25-5,wereverifiedtobepulledandthisvalvewasleaktested.Followinganadjustment,thevalveseatstopadjustmentscrewwaslockeddown-,andtheleakagerateacrossFCV-25-5wasreducedto200SCCM.CAUSEOFTHEEVENTTherootcauseofthiseventwaspersonnelerrorbycontractormaintenancepersonnelinthatthevalvetraveladjustmentscrewlocknutwasonlyhandtightenedthelasttimethevalvetravelwasadjusted.AcontributingfactortothiseventisthelackofguidanceintheTechnicalManualonhowtotightentheadjustmentscrewlocknut.ThehandtightlocknutallowedthevalvetraveltodriftandresultedintheexcessiveleakageacrossFCV-25-S.Therewerenounusualcharacteristicsoftheworklocationthatdirectlycontributedtothepersonnelerror.

NRCform344AI9431LICENSEENTREPORTILER)TEXTCONTINIONU.S.NUCLEARREOULATORYCOMMISSIOAPPROVEOOMSNO.3I50&I04EXPIRES:4/31/bbPACILITYNAMEIIIOOCKETNUMSERIEILERNUMSERISIYEARIN+l44ovENTIALgP'lfvleloN*'>+rNVM44R~'vNVM44RPACEI3)St.Lucie,Unit2TEXT///moveopocerooovrvorLooo~/enovvo///RCfr>>rrr3/34A9/IITIosooo38989-004-0003oF03ANALYSISOFTHEEVENTThis,eventhasbeendeemedreportableaspertherequirementsof10CFR50.73(a)(2)(i)(B),anyoperationorconditionprohibitedbytheplant'sTechnicalSpecifications.ThepreviouslocalleakratetestingonPenetration10wasperformedwithsatisfactoryresultsduringthenormallyscheduledrefuelingoutagewhichranfromearlyFebruarythroughAprilof1989.Unit2TechnicalSpecificationSurveillanceRequirement4.6.1.7.3"requirestestingof.thePurgeValvestobeconductedat-intervalsofatleastonceper6monthsonastaggeredtestbasis.Therefore,thecontainmentleakagerates,accordingtotherequirementsofthisTechnicalSpecification,weretestedwellwithintheboundsofthespecifiedsurveillanceinterval.ThelimitsforcontainmentleakageratesintheUnit2TechnicalSpecificationsarederivedfromtherequirementsofAppendixJto10CFR50.SincetheothertwovalvesintheContainmentPurgeexhaustlines(FCV-25-4andFCV-25-6)wereoperable,the,containmentisolationsafetyfunctionwasmaintainedandthehealthandsafetyofthepublicwasnotthreatened.CORRECTIVEACTIONS2)3)4)5)OperationspersonnelconfirmedthatthefuseswerepulledonFCV-25-6.TheTechnicalStaffTestGroupleaktestedFCV-25-6.I&CadjustedandlockeddownthestopforclosingofFCV-25-5.TheTechnicalStaffTestGroupre-testedFCV-25-5.TheInstrument-&ControldepartmentwillsubmitachangerequesttovendorTechManual2998-4508toprovidemoreguidanceonadjustingthevalvetravelandlockingdowntheadjustmentscrew..ADDITIONALINFORMATION1~2~ComonentIdentif'cat'onThiseventdidnotinvolveanNPRDSreportablecomponentfailure.PreviousSimilarEventsrForasimilarevent,seeLERN335-87-005,whichpertainstoexcessiveleakagepastacontainmentpurgevalveonUnit.Nl.IIN/lcPO/IM344AI943I