ML17223B213

LER 91-004-00:on 910516,late Fire Watch Patrol of Shield Bldg Discovered.Caused by Personnel Error.Shield Bldg Exhaust Fan Secured to Allow Access to Annulus & Fire Watch Entered Annulus & Performed patrol.W/910614 Ltr

ML17223B213
Person / Time
Site:	Saint Lucie
Issue date:	06/14/1991
From:	KILROY T, SAGER D A FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-91-177, LER-91-004-01, LER-91-4-1, NUDOCS 9106210300
Download: ML17223B213 (6)

Text

ACCELERATEDDISTRIBUTIONDEMONSTRATIONSYSTEMeREGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9106210300DOC.DATE:91/06/14NOTARIZED:NOFACIL:50-335St.LuciePlant,Unit1,FloridaPower&LightCo.AUTH.NAMEAUTHORAFFILIATIONKILROY,T.FloridaPower&LightCo.SAGER,D.A.FloridaPower&LightCo.RECIP.NAMERECIPIENTAFFILIATIONDOCKET.g05000335R

SUBJECT:

LER91-004-00:on910516,latefirewatchpatrolofshieldbldgdiscovered.Causedbypersonnelerror.Shieldbldgexhaustfansecuredtoallowaccesstoannulus&firewatchenteredannulus&performedpatrol.W/910614ltr.DISTRIBUTIONCODE:IE22TCOPIESRECEIVED:LTRENCLSIZE:TITLE:50.73/50.9LicenseeEventReport(LER),IncidentRpt,etc.NOTES:DRECIPIENTIDCODE/NAMEPD2-2LANORRIS,JINTERNAL:ACNWAEOD/DOAAEOD/ROAB/DSPNRR/DET/EMEB7ENRR/DLPQ/LPEB10NRR/DREP/PRPB11NRR/DST/SICB8H3NRR/DST/SRXB8ERES/DSIR/EIBEXTERNAL:EG&GBRYCE,J.HNRCPDRNSICPOORE,W..COPIESLTTRENCL1111221122111122111111331111RECIPIENT-IDCODE/NAMEPD2-2PDACRSAEOD/DSP/TPABNRR/DET/ECMB9HNRR/DLPQ/LHFB10NRR/DOEA/OEABNRR/DST/SELB8D/T/SB8D1REG~02CA2FILE01LSTLOBBYWARDNSICMURPHY,G.ANUDOCSFULLTXTCOPIESLTTRENCL11221111111111111111111.111DDDNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!DDFULLTEXTCONVERSIONREQUIREDTOTALNUMBEROFCOPIESREQUIRED:LTTR33ENCL33

P.O.Boxz8,Ft.Prerce,FL34954-0120"FPLJune14,1991L-91-17710CFR50.73U.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,D.C.20555Gentlemen:Re:St.LucieUnit1DocketNo.50-335ReportableEvent:91-04DateofEvent:May16,1991LateTechnicalSpecificationRecpxiredFireWatchPatrolDuetoPersonnelErrorTheattachedLicenseeEventReportisbeingsubmittedpursuanttotherequirementsof10CFR50.73toprovidenotificationofthesubjectevent.Verytrulyyours,D.AViceSt.rcageresident.iePlantDAS/JJB/kwAttachmentcc:StewartD.Ebneter,RegionalAdministrator,USNRCRegionIISeniorResidentInspector,USNRC,St.LuciePlantDAS/PSLN4559106".10300910614PDR&DOCK000033.':-PDRanFPLGroupcompanyIV4'v'oy FPLFCOatmleOlNRCForm366(849)L.S.NUCLEARREGULATORYCOMMSSIONLICENSEEEVENTREPORT(LER)XttlXNIONIIXXT1WCIXIXXXXXXXIOCCIXCI%NTOXIXXOOItOIIXNXXNXNIOTXSXTWINTNSINIXWXTXN~IXXXXXT'IIXXIIIXWXNNITCCONCNTCXXNIXXNCSJXXNCCTXNTXTOTINIXOXXNNOIXTXXOCNCXIXNTWINXXIltCXXIXCNXXTNTXXXIXNXIXXXXNNNXXWNXNXXNXI,OCXXNXttONITINttTTNXXNIXTXOMNtASKCTT,$1XXCXNT.OIIICXCXINNNNICNTNOTXXXÃT,WNXNIXlOKOCNCCLFACILITYNAME(1)St.LucieUnit1DOCKETNUMBER(2)PAGE305000335103'~(4)LateTechnicalSpecificationRequiredFireWatchPatrolduetoPersonnelErrorEVENTDATE(5)LERNUMBER(6)REPORTDATE(7)OTHERFACILITIESINVOLVED(8)05DAYYEAR169191004YEARSIAL00MONTHDAY0614YEARFACILITYNAMESN/AN/ADOCKETNUMBER(S)0500OPERATINGMODE(9)20.402(b)20.405(c)50.73(a)(2)(iv)THISREPORTISSUBMITTEDPURSUANTTOlHEREQUIREMENTSOF10CFR:Checkoneormoreofthefollowfn(11)73.71(b)POWERLEVEL(10)10020.405(a)(1)(i)20.405(a)(1)(ii)20.405(a)(1)(iii)20.405(a)(1)(iv)20.405(a)(1)(v)50.36(c)(1)50.36(c)(2)50.73(a)(2)(i)50.73(a)(2)(il)50.73(a)(2)(iii)50.73(a)(2)(v).50.73(a)(2)(vii)50.73(a)(2)(viii)(A)50.73(a)(2)(viii)(B)50.73(a)(2)(x)73.71(c)OTHER(SpecifyinAbstractbelowandinTextNRCFcrm366A)NAMELICENSEECONTACTFORTHISLER12TomKilroy,ShiftTechnicalAdvisorTELEPONENUMBERAREACODE407465-3550COMPLETEONELINEFOREACHCOMPONENTFAILUREDESCRIBEDINTHISREPORT13CAUSESYSTEMCOMPONENTTURERREPORTABLETONPRDS'AUSESYSTEMCOMPONENTREPORTABLETONPRDSSUPPLEMENTALREPORTEXPECTED14IIIEXPECTEDMONTHDAYYEARSUBMISSIONDATE(15)YES(Ifyes,completeEXPECTEDSUBMISSIONDATE)>NOABSTRACT(Limitto1400spaces.i.e.approximatelyfifteensingle-spacetypewrittenlines)(16)On16May,1991,whileoperatingat100%power,St.LucieUnit1experiencedalatefirewatchpatroloftheshieldbuildingannulusarea.DuetomodificationsbeingperformedtotheUnit1FireDetectionsystem,the"BNsideFireDetectionsystemwasoutofservice,forwhichTechnicalSpecification3.3.3.7requiresan8hourfirewatchinspectionoftheshieldbuildingannulus.Aconcurrent10hoursurveillancerunofashieldbuildingexhaustfancreatedadifferentialpressureacrosstheannulusdoorthatmadeitimpossibletoopenandgainaccesstoperformtheinspection.Uponnotificationofthiscondition,thecontrolroomseniorreactoroperatorassumedthatthefirewatchwasrequiredshiftlyratherthanevery8hours,andcontinuedtheexhaustfansurveillance.WhenthesiteFireProtectiondepartmentlaternotifiedthecontrolroomthatthefirewatchwaslate,operatorssecuredthe6BShieldBuildingExhaustfantoallowthefirewatchtobeperformed.Thecauseofthiseventwaspersonnelerror.Thesurveillancerunoftheshieldbuildingexhaustfaninterferedwiththescheduledfirewatch,resultinginthefirewatchtimeintervalbeingexceeded.Correctiveactionsforthiseventweretosecuretheshieldbuildingexhaustfantoallowaccesstotheannulus,performtherequiredfirepatrol,anddefertheexhaustfansurveillanceuntiltheBsideFireDetectionsystemwasplacedbackinservice.TheTrainingDepartmentwillreviewthiseventforpossibleincorporationintotheLicensedOperatorRequalificationTrainingprogram,andControlRoomsupervisionwillreceivecounsellingoncorrectinterpretationofTechnicalSpecificationfirewatchrequirements.FPLFacsimileofNRCForm366(6-89)

FPLFacslmlroNRCForm666(646)Ua.NUCLEARREGULATORYCOMMlsslONLICENSEEEVENTREPORT(LER)TEXTCONTINUATION~aerrosr~qgEXPICRVXHtSfhlAItOEIDO4PGIlESIONRro0&OLYWlN1NSMCIVATCNrCLrCllCHIKQXST:~IJPALtCAWJA>CCNACNlSIKEWQHOb/EXNCSAAUClollCIK00%$JVQIKPCRYSIWWXlCNTNWCHp~U4NXEEAlmOAAIQW~Asoeoltw,ooswLrrclroilkpJvf3wcIwNzAJcAcNpAltc'rl31rrrer~cfAcccI'INwoocÃfAKlsscftvwM~oojcockFACILITYNAME(1)St.LucieUnit1DOCKETNUMBER(2)LERNUMBER(6)EQUENTIALNUMBERREVISIONUMBERPAGE(3)05000335TEXT(lfmorespaceisrequired,useadditionalNRCForm366A's)(17)91004000203OnMay131991,St.LucieUnit1wasoperatingat100%power.ModificationswerestartedontheFireDetectionSystemcircuitry(EIIS:IG).ThesemodificationsrequiredthattheaffectedsideoftheFireDetectioncircuitry(either"A"or"B")betakenoutofservice.TechnicalSpecification3.3.3.7requiresthatafirewatchbeestablishedandafirepatrolbeperformedevery8hoursinthecontainmentshieldbuildingannulusareawhiletheassociatedfiredetectorsareoutofservice.OnMay15at2230,an8hourfirewatchpatrolwasperformedontheshieldbuildingannulus.At0100onMay16,Operationsbeganthemonthly10hoursurveillancerunofthe6BShieldBuildingExhaustfan(EIIS:VG),perTechSpec3.6.6.1.At0630,contractormaintenancepersonnelonthefirewatchteammadeanattempttoaccesstheannulustoperformthefirewatch,buttheannulusdoorcouldnotbeopenedduetothedifferentialpressurecreatedbythefan.Thecontrolroomwasnotified,buttheutilitylicensedseniorreactoroperatorassumedthatthefirepatrolwasrequiredshiftly(TechnicalSpecificationsdefine"shiftly"requirementsasthosetobeperformedevery12hours),ratherthanevery8hours,anddidnotverifyhisassumptionagainsttheTechnicalSpecifications.At0840,thecontractornotifiedtheutilityFireProtectiondepartmentthatthefirewatchwasnotperformed.Atthattime,thecontrolroomwascontactedandthe6BShieldBuildingExhaustfanwassecured.Theannulusfirewatchwasperformedat0913,afteraperiodof10hours,43minutes.TherootcauseofthiseventwaspersonnelerrorbyautilitylicensedSeniorReactorOperator.Therequ'lred8hourfirewatchoftheannulusareawasdelayedbytheconcurrentperformanceofthe10hourmonthlysurveillancerunofthe6BShieldBuildingExhaustfan.Thedifferentialpressureacrosstheannulusdoorwassuchthatitwasphysicallyimpossibletoopenthedoor.Additionally,whentheUnit1SeniorReactorOperatorwasnotifiedoftheproblem,heincorrectlyassumedthatthefirewatchwasashiftly(12hour)requirement,ratherthanan8hourrequirement.Therewerenounusualcharacteristicsoftheworklocationthatcontributedtotheerror,norwereanyactionstakencontrarytoanyapprovedplantprocedures.FPLFacsimileofNRCForm366(6-69)

FPLFacslrtiroOiNRCFormS66(6-69)U.S.NUCLEARREGULATORYCOMMISSIONLICENSEEEVENTREPORT(LER)TEXTCONTINUATION0ITIOITOOH5IIO01100104~SKLIIT000Cr01ITTOTCTOOITOIIcsawcTOCO00TTCCIO0000ICTC01CoutcnofITXCCCOTICITICIOIWIIOCCICCIIICICOWOWOICTTIOITCTI0AtcTOTIOICOTTTICITOICTOOCIlINACKl47rtITWCH+400OCIOOTffr%OAATOPNCCMCSSCK~,OCT054LrfctTollC0%0OIIIICT01COVCIT01IITlÃOTI01I0010TTOFTCCC0WIKXMJITNOMXCT.Tlk%IICIIOCOCTICIILFACILITYNAME(1)St.LucieUnit1DOCKETNUMBER(2)05000335YEAR91LERNUMBER(6)EQUENTIALNUMBER004REVISIONUMBER00PAGE(3)0303TEXT(Ifmorespaceisrequired,useadditionalNRCForm366A's)(17)TechnicalSpecification3.3.3.7listsaminimumnumberoffiredetectorsthatmustbeoperableforplantoperation.Withthenumberofdetectorsinagivenzonelessthanthenumberrequiredtobeoperable,aperiodicfirewatchmustbeinitiatedandafirepatrolbecontinuallyperformed.Thisspecificationrequiresaminimumof1operabledetectorinzoneBoftheannulusregion.Withthe"B"sideFireDetectionsystemtakenoutofservice,nofiredetectorswereavailableinzoneBoftheannulus,andthus,an8hourfirewatchwasestablished.BothzoneAdetectorswereoperablethroughouttheentireevent.ThezoneAandzoneBdetectorsoccupythesamegeneralareaandarenotseperatedbyanyphysicalbarriers;thusfiredetectionintheannuluswas,availablethroughoutthistimeperiod.Thetotalelapsedtimebetweenfirepatrolswas10hoursand43minutes,whichonlyslightlyexceededthe8hourintervalrequiredbyTechSpecs.Thehealthandsafetyofthepublicwasnotendangeredatanytimeduringthistimeperiod.1)Operationssecuredthe6BShieldBuildingExhaustfantoallowaccesstotheannulusforthefirewatch.2)Thefirewatchenteredtheannulusandperformedtherequiredfirewatchpatrol.3)The6BShieldBuildingExhaustfansurveillancewasdeferreduntiltheBsidefiredetectionsystemwasplacedbackinservice.4)TrainingwillreviewthiseventforpossibleincorporationintotheLicensedOperatorRequalificationTrainingprogram.5)ControlRoomsupervisionwillreceivecounsellingoncorrectinterpretationofTechnicalSpecificationfirewatchrequirements.Forthemostrecentsimilarevent,seeLER335-83-25,"SurveillanceofFireStations"NoneFPLFacsimileofNRCForm366(6-89)