ML17266A141: Difference between revisions

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| document type = LICENSEE EVENT REPORT (SEE ALSO AO,RO), TEXT-SAFETY REPORT
| document type = LICENSEE EVENT REPORT (SEE ALSO AO,RO), TEXT-SAFETY REPORT
| page count = 3
| page count = 3
}}
=Text=
{{#Wiki_filter:NRCFORM366g77)LICENSEEEVENTREPORTU.S.NUCLEARRKCULATORYCOMMISSIONCONTROLBLOCK:IIQl(PLEASEPAINTORTYPL'LLRKOUIAEOINFORMATION)[OO~]14CON'T~0I~03Q.2526LCE.NSE,Y)sJOOl9LICENSEECQQE14'5LICSh$4NVM4KR57~T"'Ell-LEoI''a~4041QQCKETNUMSER44EVENTOKSCRIPTIONANOSRQBABLKCONSKOUEiNC'KSQIODurinnormaloerationsCEA30reedQ~<'QEVENTCATE14ISASSORTQAE40switchositionindicationchannelfailed.ThechannelwasdeclaredINOPERABLE.InaccordancewithTS3ILIIIElllI-00III-1041111111Q~Qwwithdrawniinonceer12hoursatthisposition.Thechannelwasrepairedandreturnedtoservice.Thischannelfailedaain8dasafterreturnintoservice.~07~08ThesameactionerTS3.1~3.3wasaainerformedbutthechannelhasnobeenreairedet.Thisisthefirsteventofthiste.40~OB5Y5TK4ICAUSECAU5ECQMS.VALVECQQECQQE5VSCQQECCMSONENTCQQESVSQQESUECQOS~BS~ESLee~IN404NQLoeLee79101112ll191929SKQVENTIALOCCURRENCE~REPORTREVISION~LERIROEVENTYEAARESORTNO.CQQETYPE~NQ.QEENoa<<~0~~003~m~03~L~~0'll22'll242621252920llllACTIQIISUTUREEFFECTSsaVTQQWNATTACHMENTNSRQ44PRIMECQMS.CQMSONKNTTAKENACTIONCNPLANTMETHQQNQLNAS225USMITTEQFOAMSUb.SVPSIJKRMANUFACTURERLNNSLaSLIJSUZS00NlLUQLNLSXIIIQ~4043$36~4041424441CAUSEOESCRIPTIONANOCORRECTIVEACTIONSQ270Thecauseofthesechannelfailes'stiallreairedbrelacinashortedthiswasthesecondsarecablethatwastriedthechannelremainedfailedwhenthefirstsarecablewasinstalled.Thechannelfailurecauseandreairwillbeinvestiateddurinthe1980refuelingoutage.4aa(~laN'NA749I'I12LC$5QFCRQAMOE0FACILITYQ43TYIEEOESCRIPTIQNEZlZJO269'0rVSLIC:TYQESCAIPT:QN~0~NIP)9'0'AM.A.Schoppman99FACILITY~~30METIIOQOFSTiATUS'4POWEROTIIEASTATUSP/OISCQVERVeonILISLEENJJ!IS~.L~ES9910'll1244ACllVITYCONTENTRELKASEQOFRELEASEAMQUN'TOPACTIVITYQSSB~ZQ32~ZQ3NAl99104446IEEASQNNELEXIIOSVAKS~IE~000Q>>~ZQEENA791112ll~ERSQNNELINIURIESEKl~~0QAOOISCOVEAVQESCAISTIQNQ20craterObservationNALOCATIONOSRELEASEQSB50NRCUSEONLY646940PH0NE:305552-3802800$BEO 4
ReportableOccurrence335-SO-3LicenseeEventReportPaeTwoAdditionalEventDescriptionandProbableConseuencesDuringnormal100Kpoweroperation,CEA830reedswitchpositionindicationchannelfailed.ThechannelwasdeclaredINOPERABLE.InaccordancewithTechnicalSpecification3.1.3.3,CEA830waswithdrawntotheUpperElectricLimitposition("FullOut"),CEA430wasverifiedatleastonceper12hoursatthispositionaspoweroperationcontinued.Elevendayslater,followinganunrelatedplanttrip,investigationofthecauseforthechannelfailureseemedto.ndicateashortedpowercableinthevicinityofthereactorvesselhead.Thiscablewasreplacedwithasparecable,butthefailedchannelremainedINOPERABLE.Asecondsparecablewasinstalledandthychannelbecameoperable.Thechannelwassuccessfullytestedforsatis'factoryoperationanddeclaredOPERABLE.Theplantwasstartedupandreturnedto100&#xc3;poweroperation.EightdaysafterreturningthischanneltoOPERABLEstatus,itfailedagain.Thesameappropriateactionsstatedabovewereperformedagain.CEA430reedswitchpositionindicationchannelispresentlyINOPERABLE.CEA830isinregulatingCEAgroupnumber1whichisnotusedforpowershaping.Also,itisthelastregulatinggrouptomoveduringinsertion.Therefore,CEA$30canbemaintainedfullyoutattheUpperElectricLimitwithoutanyeffectonoperationsorgroupalignment.AllCEA'sweretrippableduringtheevent.ThisproblemwillbeinvestigatedandresolvedduringtherefuelingoutagescheduledHarch15,1980orpriortorestartingfromanyunplannedoutage,whicheverisfirst.
}}
}}

Revision as of 02:38, 25 April 2018

LER 80-003/03L-0:on 800106,during Normal Operations,Control Element Assembly 30 Reed Switch Indication Channel Failed, Eight Days After Repair for Same Problem.Cause Unknown;Will Be Investigated During Refueling Outage
ML17266A141
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 02/05/1980
From: SCHOPPMAN M A
FLORIDA POWER & LIGHT CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17207A831 List:
References
LER-80-003-03L, LER-80-3-3L, NUDOCS 8002210378
Download: ML17266A141 (3)
v • d • e


Text

NRCFORM366g77)LICENSEEEVENTREPORTU.S.NUCLEARRKCULATORYCOMMISSIONCONTROLBLOCK:IIQl(PLEASEPAINTORTYPL'LLRKOUIAEOINFORMATION)[OO~]14CON'T~0I~03Q.2526LCE.NSE,Y)sJOOl9LICENSEECQQE14'5LICSh$4NVM4KR57~T"'Ell-LEoIa~4041QQCKETNUMSER44EVENTOKSCRIPTIONANOSRQBABLKCONSKOUEiNC'KSQIODurinnormaloerationsCEA30reedQ~<'QEVENTCATE14ISASSORTQAE40switchositionindicationchannelfailed.ThechannelwasdeclaredINOPERABLE.InaccordancewithTS3ILIIIElllI-00III-1041111111Q~Qwwithdrawniinonceer12hoursatthisposition.Thechannelwasrepairedandreturnedtoservice.Thischannelfailedaain8dasafterreturnintoservice.~07~08ThesameactionerTS3.1~3.3wasaainerformedbutthechannelhasnobeenreairedet.Thisisthefirsteventofthiste.40~OB5Y5TK4ICAUSECAU5ECQMS.VALVECQQECQQE5VSCQQECCMSONENTCQQESVSQQESUECQOS~BS~ESLee~IN404NQLoeLee79101112ll191929SKQVENTIALOCCURRENCE~REPORTREVISION~LERIROEVENTYEAARESORTNO.CQQETYPE~NQ.QEENoa<<~0~~003~m~03~L~~0'll22'll242621252920llllACTIQIISUTUREEFFECTSsaVTQQWNATTACHMENTNSRQ44PRIMECQMS.CQMSONKNTTAKENACTIONCNPLANTMETHQQNQLNAS225USMITTEQFOAMSUb.SVPSIJKRMANUFACTURERLNNSLaSLIJSUZS00NlLUQLNLSXIIIQ~4043$36~4041424441CAUSEOESCRIPTIONANOCORRECTIVEACTIONSQ270Thecauseofthesechannelfailes'stiallreairedbrelacinashortedthiswasthesecondsarecablethatwastriedthechannelremainedfailedwhenthefirstsarecablewasinstalled.Thechannelfailurecauseandreairwillbeinvestiateddurinthe1980refuelingoutage.4aa(~laN'NA749I'I12LC$5QFCRQAMOE0FACILITYQ43TYIEEOESCRIPTIQNEZlZJO269'0rVSLIC:TYQESCAIPT:QN~0~NIP)9'0'AM.A.Schoppman99FACILITY~~30METIIOQOFSTiATUS'4POWEROTIIEASTATUSP/OISCQVERVeonILISLEENJJ!IS~.L~ES9910'll1244ACllVITYCONTENTRELKASEQOFRELEASEAMQUN'TOPACTIVITYQSSB~ZQ32~ZQ3NAl99104446IEEASQNNELEXIIOSVAKS~IE~000Q>>~ZQEENA791112ll~ERSQNNELINIURIESEKl~~0QAOOISCOVEAVQESCAISTIQNQ20craterObservationNALOCATIONOSRELEASEQSB50NRCUSEONLY646940PH0NE:305552-3802800$BEO 4

ReportableOccurrence335-SO-3LicenseeEventReportPaeTwoAdditionalEventDescriptionandProbableConseuencesDuringnormal100Kpoweroperation,CEA830reedswitchpositionindicationchannelfailed.ThechannelwasdeclaredINOPERABLE.InaccordancewithTechnicalSpecification3.1.3.3,CEA830waswithdrawntotheUpperElectricLimitposition("FullOut"),CEA430wasverifiedatleastonceper12hoursatthispositionaspoweroperationcontinued.Elevendayslater,followinganunrelatedplanttrip,investigationofthecauseforthechannelfailureseemedto.ndicateashortedpowercableinthevicinityofthereactorvesselhead.Thiscablewasreplacedwithasparecable,butthefailedchannelremainedINOPERABLE.Asecondsparecablewasinstalledandthychannelbecameoperable.Thechannelwassuccessfullytestedforsatis'factoryoperationanddeclaredOPERABLE.Theplantwasstartedupandreturnedto100Ãpoweroperation.EightdaysafterreturningthischanneltoOPERABLEstatus,itfailedagain.Thesameappropriateactionsstatedabovewereperformedagain.CEA430reedswitchpositionindicationchannelispresentlyINOPERABLE.CEA830isinregulatingCEAgroupnumber1whichisnotusedforpowershaping.Also,itisthelastregulatinggrouptomoveduringinsertion.Therefore,CEA$30canbemaintainedfullyoutattheUpperElectricLimitwithoutanyeffectonoperationsorgroupalignment.AllCEA'sweretrippableduringtheevent.ThisproblemwillbeinvestigatedandresolvedduringtherefuelingoutagescheduledHarch15,1980orpriortorestartingfromanyunplannedoutage,whicheverisfirst.

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