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{{#Wiki_filter:NRCFORM366(64)9)V.S.NUCLEARREGULATORYCOIBMISSIONLlCENSEEEVENTREPORT(LER)APPAOVEDOMBNO.31504)(04EXPIRES:4/30/92ESTIMATEDBUADENPERRESPONSETOCOMPLYWTHTHISINFOAMA'TIONCOLLECTIONREQVEST:50.0HRS.FORWARDCOMMENTSREGARDINGBURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENTBRANCH(P630),V.S,NUCLEARREGULATORYCOMMISSION,WASHINGTON,DC20555.ANDTOTHEPAPERWORKREDUCTIONPROJECT(31500104).OFFICEOFMANAGEMENTANDBUDGET,WASHINGTON.DC20503.FACILITYNAME(I)R.E.GinnaNuclearPowerPlantDOCKETNUMBER(2IPAE3a5oao24410F11FeedwaterControlPerturbations,DuetoaSecondaryTransient,CausesSteamGeneratorHighLevelFeedwaterIsolationsEVENTDATE(5)LERNUMBER(6IREPORTDATE(7)OTHERFACILITIESINVOLVED(6)MONTHDAYYEARYEAR@I(SEQUENTIALNUMBERy+iy~RBV6~MONTHPFiNUMBEROAYYEARFACILITYNAMESDOCKETNUMBERISI05000051892920060107299305000OPERATINGMODE(9)POWERLEVEL09'"844~WfE<~::20.402(B)20.405(e)(1)(l)20.405(vill)(ill20.405(~I(1)Bill20.405(e)(Il(lv)20.405(cl(1I(vl20.40S(c)5026(cl(l)50.35(c)12)50.73(~I(2)II)50.73(~l(2)ill)50.73(cl(2)BillX60.73(c)(2)(iv)50.73(c)(2)(v)50.73(el(21(vill50.73(cl(2)(vill)IA)50.73(~)(2)(villI~(6)50.'13(cu2)(c)LICENSEECONTACTFORTHISI.ER(12)THISREPORTISSUBMITTEDPURSUANTTOTHEREQUIREMENTSOF10CFA((:/CheekoneormoreofthefoliowinPll11)73.71(bl73.71(clOTHER/SpecifyinAbttieCtbelowerxflnText,h/RCForm34$4/NAMEMesleyH.BackusTechnicalAssistanttotheOperationsManagerTELEPHONENUMBERAREACODE315524-'446COMPLETEONELINEFOREACHCOMPONENTFAILUREOESCRIBEOINTHISREPORTl13)CAUSESYSTEMCOMPONENTMANUFACTURERREPORTABLETONPRDSc.:i3Nqz~.'Li')3~6g~PCAUSESYSTEMCOMPONENTMANVFAC.TUAEREPORTABLETQNPRDS48)WN):yccSVPPLEMENTALREPORTEXPECTED(14)XNOYES/lfyet,completeEXPECTEDSV84(ISSIDh/DATE/EXPECTEDSUBMISSIONDATEIISIMONTHOAYYEARABsTRAcT/Limitto/etx)cpecer,l.e.,epproxlmetelyfifteenrinpieIpecetypewrittenEnnl(16)OnMay18,1992atapproximately1339EDST,withtheReactoratapproximately974fullpower,MainFeedwaterIsolationsoccurredonthe"A"SteamGenerator(S/G).Thesefeedwaterisolationswerecausedbyoverfeedingthe"A"S/Gwhileinmanualcontrol,followingasecondarysystempressuretransient.ImmediateoperatoractionwastomanuallycontroltheMainFeedwaterRegulatingValves(FRV)toreducethesteamgeneratorwaterlevelsandstabilizetheplant.Theimmediatecauseoftheeventisduetoasecondarysystempressuretransient.CorrectiveactionstakenorplannedarediscussedinSectionVofthetext.9308090332930729PDR(BIDDCK050002448PDRNRCForm366(669) l NRCFORM366A(649)US.NUCLEARREGULATORYCOMMISSIONLICENSEEEVENTREPORTILER)TEXTCONTINUATIONAPPROVED0MBNO.3150dl0iEXPIRES:4/30/92ESTIMATEDBURDENPERRESPONSETOCOMPLYWTHTHISINFORMATIONCOLLFCTIONREQUEST:50A)HRS.FORWARDCOMMENTSREGARDINGBURDENESTIMATETOTHERECORDSANOREPORTSMANAGEMENTBRANCH(P430),U.S.NUCLEARREGULATORYCOMMISSION,WASHINGTON,DC20555,ANDTOTHEPAPERWORKREDUCTIONPROJECT(31500104),OFFICEOFMANAGEMENTANDBUDGET,WASHINGTON,DC20503.FACILITYNAMEl'llDOCKETNUMBER(2)LERNUMBER(6)YEARWRSEQUENTIAL0/6IIEVISIONEAR@~NUMSBNY>>NUMBEIIPAGE(3)R.E.GinnaNuc1earPowerP1antTEXTflfII>>me>>co/Jmvvtmd,v>>>>//I/oI>>/NRCFomI38SABI(IT)osooo2"492006010"2OFI~PREEVENTPLANTCONDITIONSTheplantwasatapproximately974steadystatepowerwithnomajoractivitiesinprogress.InstrumentandControl(I&C)DepartmentpersonnelwereinvestigatingtheAdvancedDigitalFeedwaterControlSystem(ADFCS)duetosomefeedwateroscillationsthathadoccurredatapproximately1110EDST,May18,1992.Thesefeedwateroscillationswerebeingcausedbythe"A"and"B"SteamGenerator(S/G)MainFeedwaterRegulatingValves(FRVs)cycling(between43%and484),attwicetheirnormalfrequencyandinoppositephasefromeachother.Thisfeedwaterresponse(instabilitywhileinautomaticcontrol)wasnewandunexpectedbytheoperators.I1~DESCRIPTIONOFEVENTA>>DATESANDAPPROXIMATETIMESOFMAJOROCCURRENCES'May18,1992,1337EDST:ASecondarySideTransientoccurs.oMay18,1992,1339EDST:EventDateandApproximateTime.0May18,1992,1339EDST:DiscoveryDateandApproximateTime.0May18,1992,1342EDST:ControlRoomoperatorsrestoreS/GlevelstonormalandplaceMainFRVsinautomatic.NRCFomI366A(689)  
{{#Wiki_filter:NRCFORM366(64)9)V.S.NUCLEARREGULATORY COIBMISSION LlCENSEEEVENTREPORT(LER)APPAOVEDOMBNO.31504)(04 EXPIRES:4/30/92ESTIMATED BUADENPERRESPONSETOCOMPLYWTHTHISINFOAMA'TION COLLECTION REQVEST:50.0HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(P630),V.S,NUCLEARREGULATORY COMMISSION, WASHINGTON, DC20555.ANDTOTHEPAPERWORK REDUCTION PROJECT(31500104).
~1 NRCFORM356A(64)9)US.NUCLEARREGULATORYCOMMISSIONLICENSEEEVENTREPORT(LER)TEXTCONTINUATIONAPPAOVEOOMBNO.31500104EXPIRES'/30)92ESTIMATEDBURDENPERRESPONSETOCOMPLYWTHTHISINFORMATIONCOLLECTIONREQUEST:50J>HRS.FORWARDCOMMENTSREGARDINGBURDENESTIMATETOTHEAECOADSANDREPORTSMANAGEMENTBRANCHIP430).U.S.NUCLEARAEGULATORYCOMMISSION,WASHINGTON,DC20555,ANDTO1HEPAPERWORKREDUCTIONPROJECT(31504>104>.OFFICEOFMANAGEMENTANDBUDGET.WASHINGTON,OC20503,FACILITYNAME(1IDOCKETNUMBER(2)YEARLERNUMBER(5)SEOVENTIALNVMeER~o):REVISION))BSNUMERPAGE(3)R.E.GinnaNuclearPowerPlantTEXTPfmom<<>>o>>bmqu)fed,u>>JSBu>>JHRCFomI35543)(12)050002060B~EVENT:OnMay18,1992,atapproximately1337EDST,withtheReactoratapproximately974fullpower,asecondarysidecondensatesystemdecreasingpressuretransientoccurred.ThispressuredecreasetraveledthroughouttheentiresecondarysideandwasreflectedaslowfeedwaterheaderpressureandcorrespondingdecreaseindifferentialpressureacrossbothFRVs.TheADFCSrespondedtothelowfeedwaterheaderpressurebyincreasingtheopendemandsignaltothemainFRVsinordertomaintaintheproperfeedwaterflow.At,:::Mhi.'s'g~)::;same@~t"ime$>.:;,":,::.:,:fh'e"';:;,:",:;'.2!C1>:observingthatthemainFRVsopendemandsignalswerehigherthannormalandincreasing,andthatfeedwaterflowtothe"BL(S/Gwashigherthanappropriate,tookmanualcontroloftheMainFRVstopreventfurtheropeningofthevalves.Eo'eaai>>'"eiahea'e'"'i.,::aP'z4~ssii'aa".:)'heControlRoomoperatorsmanuallyrestoredS/Glevelstonormal,andatapproximately1342EDSTrestoredthe"A"and"B"MainFRVstoautomaticcontrol.NACForm3SSA(689)
OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON.
I NRCFORM3$5A(689)UA.NUCLEARREGULATORYCOMMISSIONLICENSEEEVENTREPORTILER)TEXTCONTINUATIONAPPROVEDOMBNO.31504)0eEXPIRES:e/30/92ESTIMATEDBURDENPERRESPONSETOCOMPLYWTHTHISINFORMATIONCOLLECTIONREQUEST:50A>HRS.FORWARDCOMMENTSREGARDINGBURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENTBRANCH(F430).U.S.NUCLEARREGULATORYCOMMISSION.WASHINGTON,OC20555,ANDTO1HEPAPERWORKREDUCTIONPROJECT(31500104),OFFICEOFMANAGEMENTANDBUDGET,WASHINGTON,DC20503.FACILITYNAME(1)R.E.GinnaNuclearPowerPlantTEXT///movee/veoe/en/vvtved,Ivee////Ooe~NRCFovm3/ISAB/(IT)DOCKETNUMBER(2)osooo244YEAR92I.ERNUMBER(5)SEQUENTIAL~lPREVSIONNUMSER4v?NUMIER00601PAGE(3)04pFCDINOPERABLESTRUCTURESPCOMPONENTSPORSYSTEMSTHATCONTRIBUTEDTOTHEEVENT:None.DeOTHERSYSTEMSORSECONDARYFUNCTIONSAFFECTED:None.EDMETHODOFDISCOVERY:TheeventwasimmediatelyapparentduetoalarmsandindicationsintheControlRoom.OPERATORACTION:TheControlRoomoperatorstookimmediatemanualactionstocontrolS/Glevelsandstabilizetheplant.Subsequently,theControlRoomoperatorsnotifiedhighersupervisionandtheNuclearRegulatoryCommissionper10CFR50.72,Non-Emergency,4hourNotification.GeSAFETYSYSTEMRESPONSES:The"A"S/GMainFRVbegantocloseautomaticallyasaresultofthefeedwaterisolationsignal.Duetotheshortdurationthatthesignalwaspresent,thevalveneverfullyclosed.IIZ~CAUSEOFEVENTAeIMMEDIATECAUSE:Thefeedwaterisolationsignaltothe"A"S/GMainFRVwasduetothe"A"S/Gnarrowrangelevelbeing>/=67%.NRCFovm386A(669)  
DC20503.FACILITYNAME(I)R.E.GinnaNuclearPowerPlantDOCKETNUMBER(2IPAE3a5oao24410F11Feedwater ControlPerturbations, DuetoaSecondary Transient, CausesSteamGenerator HighLevelFeedwater Isolations EVENTDATE(5)LERNUMBER(6IREPORTDATE(7)OTHERFACILITIES INVOLVED(6)MONTHDAYYEARYEAR@I(SEQUENTIAL NUMBERy+iy~RBV6~MONTHPFiNUMBEROAYYEARFACILITYNAMESDOCKETNUMBERISI 05000051892920060107299305000OPERATING MODE(9)POWERLEVEL09'"844~WfE<~::
20.402(B) 20.405(e)(1)(l) 20.405(vill)
(ill20.405(~I(1)Bill20.405(e)
(Il(lv)20.405(cl (1I(vl20.40S(c) 5026(cl(l
)50.35(c)12) 50.73(~I(2)II)50.73(~l(2)ill)50.73(cl(2)
BillX60.73(c)(2)(iv) 50.73(c)(2)(v)50.73(el(21(vill50.73(cl(2)(vill)IA)50.73(~)(2)(villI~(6)50.'13(cu2)(c)
LICENSEECONTACTFORTHISI.ER(12)THISREPORTISSUBMITTED PURSUANTTOTHEREQUIREMENTS OF10CFA((:/CheekoneormoreofthefoliowinPl l11)73.71(bl73.71(clOTHER/SpecifyinAbttieCtbelowerxflnText,h/RCForm34$4/NAMEMesleyH.BackusTechnical Assistant totheOperations ManagerTELEPHONE NUMBERAREACODE315524-'446COMPLETEONELINEFOREACHCOMPONENT FAILUREOESCRIBEO INTHISREPORTl13)CAUSESYSTEMCOMPONENT MANUFACTURERREPORTABLE TONPRDSc.:i3Nqz~.'Li
')3~6g~PCAUSESYSTEMCOMPONENT MANVFAC.TUAEREPORTABLE TQNPRDS48)WN):yccSVPPLEMENTAL REPORTEXPECTED(14)XNOYES/lfyet,completeEXPECTEDSV84(ISSIDh/
DATE/EXPECTEDSUBMISSION DATEIISIMONTHOAYYEARABsTRAcT/Limitto/etx)cpecer,l.e.,epproxlmetely fifteenrinpieIpecetypewritten Ennl(16)OnMay18,1992atapproximately 1339EDST,withtheReactoratapproximately 974fullpower,MainFeedwater Isolations occurredonthe"A"SteamGenerator (S/G).Thesefeedwater isolations werecausedbyoverfeeding the"A"S/Gwhileinmanualcontrol,following asecondary systempressuretransient.
Immediate operatoractionwastomanuallycontroltheMainFeedwater Regulating Valves(FRV)toreducethesteamgenerator waterlevelsandstabilize theplant.Theimmediate causeoftheeventisduetoasecondary systempressuretransient.
Corrective actionstakenorplannedarediscussed inSectionVofthetext.9308090332 930729PDR(BIDDCK050002448PDRNRCForm366(669) l NRCFORM366A(649)US.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORTILER)TEXTCONTINUATION APPROVED0MBNO.3150dl0iEXPIRES:4/30/92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLFCTION REQUEST:50A)HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANOREPORTSMANAGEMENT BRANCH(P430),U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON, DC20555,ANDTOTHEPAPERWORK REDUCTION PROJECT(31500104),
OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON, DC20503.FACILITYNAMEl'llDOCKETNUMBER(2)LERNUMBER(6)YEARWRSEQUENTIAL 0/6IIEVISION EAR@~NUMSBNY>>NUMBEIIPAGE(3)R.E.GinnaNuc1earPowerP1antTEXTflfII>>me>>co/Jmvvtmd,v>>>>//I/oI>>/NRC FomI38SABI(IT)osooo2"492006010"2OFI~PREEVENTPLANTCONDITIONS Theplantwasatapproximately 974steadystatepowerwithnomajoractivities inprogress.
Instrument andControl(I&C)Department personnel wereinvestigating theAdvancedDigitalFeedwater ControlSystem(ADFCS)duetosomefeedwater oscillations thathadoccurredatapproximately 1110EDST,May18,1992.Thesefeedwater oscillations werebeingcausedbythe"A"and"B"SteamGenerator (S/G)MainFeedwater Regulating Valves(FRVs)cycling(between43%and484),attwicetheirnormalfrequency andinoppositephasefromeachother.Thisfeedwater response(instability whileinautomatic control)wasnewandunexpected bytheoperators.
I1~DESCRIPTION OFEVENTA>>DATESANDAPPROXIMATE TIMESOFMAJOROCCURRENCES' May18,1992,1337EDST:ASecondary SideTransient occurs.oMay18,1992,1339EDST:EventDateandApproximate Time.0May18,1992,1339EDST:Discovery DateandApproximate Time.0May18,1992,1342EDST:ControlRoomoperators restoreS/GlevelstonormalandplaceMainFRVsinautomatic.
NRCFomI366A(689)  
~1 NRCFORM356A(64)9)US.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORT(LER)TEXTCONTINUATION APPAOVEOOMBNO.31500104EXPIRES'/30)92 ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REQUEST:50J>HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHEAECOADSANDREPORTSMANAGEMENT BRANCHIP430).U.S.NUCLEARAEGULATORY COMMISSION, WASHINGTON, DC20555,ANDTO1HEPAPERWORK REDUCTION PROJECT(31504>104>.
OFFICEOFMANAGEMENT ANDBUDGET.WASHINGTON, OC20503,FACILITYNAME(1IDOCKETNUMBER(2)YEARLERNUMBER(5)SEOVENTIAL NVMeER~o):REVISION))BSNUMERPAGE(3)R.E.GinnaNuclearPowerPlantTEXTPfmom<<>>o>>bmqu)fed,u>>JSBu>>JHRC FomI35543)(12)050002060B~EVENT:OnMay18,1992,atapproximately 1337EDST,withtheReactoratapproximately 974fullpower,asecondary sidecondensate systemdecreasing pressuretransient occurred.
Thispressuredecreasetraveledthroughout theentiresecondary sideandwasreflected aslowfeedwater headerpressureandcorresponding decreaseindifferential pressureacrossbothFRVs.TheADFCSresponded tothelowfeedwater headerpressurebyincreasing theopendemandsignaltothemainFRVsinordertomaintaintheproperfeedwaterflow.At,:::Mhi.'s'g~)::;same@~t"ime$
>.:;,":,::.:,:fh'e"';:;,:",:;'.2!C1>:
observing thatthemainFRVsopendemandsignalswerehigherthannormalandincreasing, andthatfeedwater flowtothe"BL(S/Gwashigherthanappropriate, tookmanualcontroloftheMainFRVstopreventfurtheropeningofthevalves.Eo'eaai>>'"
eiahea'e'"'i.,::aP'z4~ss ii'aa".:)'he ControlRoomoperators manuallyrestoredS/Glevelstonormal,andatapproximately 1342EDSTrestoredthe"A"and"B"MainFRVstoautomatic control.NACForm3SSA(689)
I NRCFORM3$5A(689)UA.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORTILER)TEXTCONTINUATION APPROVEDOMBNO.31504)0eEXPIRES:e/30/92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REQUEST:50A>HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(F430).U.S.NUCLEARREGULATORY COMMISSION.
WASHINGTON, OC20555,ANDTO1HEPAPERWORK REDUCTION PROJECT(31500104),
OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON, DC20503.FACILITYNAME(1)R.E.GinnaNuclearPowerPlantTEXT///movee/veoe/en/vvtved,Ivee////Ooe~NRCFovm3/ISAB/(IT)DOCKETNUMBER(2)osooo244YEAR92I.ERNUMBER(5)SEQUENTIAL
~lPREVSIONNUMSER4v?NUMIER00601PAGE(3)04pFCDINOPERABLE STRUCTURESP COMPONENTSP ORSYSTEMSTHATCONTRIBUTED TOTHEEVENT:None.DeOTHERSYSTEMSORSECONDARY FUNCTIONS AFFECTED:
None.EDMETHODOFDISCOVERY:
Theeventwasimmediately apparentduetoalarmsandindications intheControlRoom.OPERATORACTION:TheControlRoomoperators tookimmediate manualactionstocontrolS/Glevelsandstabilize theplant.Subsequently, theControlRoomoperators notifiedhighersupervision andtheNuclearRegulatory Commission per10CFR50.72,Non-Emergency, 4hourNotification.
GeSAFETYSYSTEMRESPONSES:
The"A"S/GMainFRVbegantocloseautomatically asaresultofthefeedwater isolation signal.Duetotheshortdurationthatthesignalwaspresent,thevalveneverfullyclosed.IIZ~CAUSEOFEVENTAeIMMEDIATE CAUSE:Thefeedwater isolation signaltothe"A"S/GMainFRVwasduetothe"A"S/Gnarrowrangelevelbeing>/=67%.NRCFovm386A(669)  


NRCFORM366A~(669)UN.NUCLEARREGULATORYCOMMISSIONLICENSEEEVENTREPORTILER)TEXTCONTINUATIONAPPROVEDOMSNO.3I500104EXPIRES:4/30/92ESTIMATEDSURDENPERRESPONSETOCOMPLYWTHTHISINFORMATIONCOLLECTIONREQUEST:60.0HRS.FORWARDCOMMENTSREGARDINCBURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENTSRANCH(P430),U.S.NUCLEARREGULATORYCOMMISSION,WASHINGTON.DC20555,ANDTOTHEPAPERWORKREDUCTIONPROJECT(3150@104),OFFICEOFMANACEMENTANDBUDGET,WASHINGTON,DC20503.FACILITYNAME(1)DOCKETNUMBER(2)LERNUMBER(5)PACE(3)R.E.GinnaNuclearPowerPlantTEXT///ms/sspecs/ssc/s/NX/IIWAfldonelHRCFomI366A's/(17)osoo0244YEAR92'IxSEQUSNTIAI.N.'PREVISION@.NUMSSIIc..SNUMSSII-006-015OFB~INTERMEDIATECAUSES:hi'inui'il"!PRVi","',"'op'e'rati;:o'n","j,;:,::::::;::::,Thi.ssituax<<ti.onresulted""'i:ninadvertentoverfeedingofthe"A"S/G.Itshouldalsobenotedherethatjustpriortothisevent,feedwaterautomaticcontrolhadbeenexperiencinginstabilitywithflowoscillationsandtheoperatorsweresensitivetoabnormalindicationwithADFCSinautomaticcontroloftheFRVs....<<?~cc<<mpxc<<<<Sq~g<<I<<x<<"xc<<<<cs<<x<<S<<c>>.xsxc<<cS~ax<<Fpx<<<<S<<xq><<x+sSx<<m<<c:,3:Qe'::.:p'ertur'ax'ri'ops';,:p:.n:'map;xi,:":xeedpatser;';:pieaaer,,'::,;piessureCoxthxs'-transient-,.when:,,;,Control.:,':;Roomk'operators:,;,.tooki'"i-"!1""',:iiiiiiiii"'*IS!,:"!ilia!ab'i'~~s'6,:!:pLan'0';,i.ass'ps~$Iss'ss':-.'I1C,ROOTCAUSE:,,er,:..::,.",:.ep."ebs':ve'::,."'@nvea:xga'n::,".,e",,uner:'ygng,::,:cause8>(hap'O'1'o'sNRCForm366A(689)
NRCFORM366A~(669)UN.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORTILER)TEXTCONTINUATION APPROVEDOMSNO.3I500104EXPIRES:4/30/92ESTIMATED SURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REQUEST:60.0HRS.FORWARDCOMMENTSREGARDINC BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT SRANCH(P430),U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON.
I NRCFORM366A(669)FACILITYNAMEll)US.NUCLEARREGULATORYCOMMISSIONLICENSEEEVENTREPORT(LER)TEXTCONTINUATIONDOCKETNUMBERl2)APPROVEDOMBNO.31500)BEEXPIRES:E/30I92ESTIMATEDBURDENPERRESPONSETOCOMPLYWTHTHISINFORMATIONCOLLECTIONREOUEST:50J)HRS.FORWARDCOMMENTSREGARDINGBURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENTBRANCH(PO30),U.S.NUCLEARAEGULATOAYCOMMISSION,WASHINGTON,DC20555,ANDTO1HEPAPERWORKREDUCTIONPROJECT(3)50OIOEI.OFFICEOFMANAGEMENTANDBUDGET.WASHINGTON,DC20503.PAGE(3)LERNUMBER(6)YEARIaISEOVENTIALNVMEERREVISIONNUMBERR.E.GinnaNuclearPowerPlantTEXTllfroorp>>p>>o>>bnqaked,Ir>>>>IEE)oo>>)HRCForrrr3()SEBIl)T)osooo244920060106OF11IV>>ANALYSISOFEVENTThiseventisreportableinaccordancewith10CFR50.73,LicenseeEventReportsystem,item(a)(2)(iv),whichrequiresreportingof,"anyeventorconditionthatresultedinmanualorautomaticactuationofanyEngineeredSafetyFeature(ESF)includingtheReactorProtectionSystem(RPS)".Thefeedwaterisolationofthe"A"S/GwasanautomaticactuationofanESFsystem.Anassessmentwasperformedconsideringboththesafetyconsequencesandimplicationsofthiseventwiththefollowingresultsandconclusions:Therewerenooperationalorsafetyconsequencesorimplicationsattributedtothefeedwaterisolationsbecause:oThefeedwaterisolationsignalsoccurredattherequiredS/Glevel.oTheplantwasquicklystabilizedandmanualcontrolofFRVswasaccomplishedtomitigateanyconsequencesoftheevent.oAsthefeedwaterisolationsignalsoccurredasdesigned,theassumptionsoftheFSARforsteamlinebreakweremet.Basedontheabove,itcanbeconcludedthatthepublic'shealthandsafetywasassuredatalltimes.V.CORRECTIVEACTIONA>>ACTION,TAKENTORETURNAFFECTEDSYSTEMSTOPRE-EVENTNORMALSTATUS'AfterS/Glevelswerestabilized,theMainFRVswerereturnedtoautomaticcontrol.NRCForm366A(689)
DC20555,ANDTOTHEPAPERWORK REDUCTION PROJECT(3150@104),
Ly NACFORM366A(689)FACILITYNAME(I)U.S.NUCLEARREGULATORYCOMMISSIONLICENSEEEVENTREPORTILER)TEXTCONTINUATIONOOCKFTNUMBER(2)APPROVEDOMSNO.31500104EXPIAES:A/30/92ESTIMATEDBURDENPERRESPONSETOCOMPLYWTHTHISINFOAMATIONCOLLECTIONREQUEST:508)HRS.FORWARDCOMMENTSREGARDINGBURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENTBRANCH(F430),U.S.NUCLEARAEGULATORYCOMMISSION,WASHINGTON.DC20555,ANDTO1HEPAPERWORKREDUCTIONPROJECT(31504)OI).OFFICEOFMANAGEMENTANDBUDGET,WASHINGTON,DC20503.PAGE(3)I.ERNUMBER(6)YEARQ@SEQUENTIAL@gNUMSERREVISIONNUMBERR.E.GinnaNuclearPowerPlantTEXT///martt/rtat/tI/Vtrtr/vtt~/R/ant/NRC%%dmISIJSAB/(17)osooo24492006-0107OFB~ACTIONTAKENORPLANNEDTOPREVENTRECURRENCE:5'0:!;,':::;,:::;:Px/aYpn:::::::::':::,::.::FtnSILIx,i;tE(near!::,:.,:of('rIE,,ISnaIyj3:,nipnet,:;-::lph's(e'n':::;:::,::i'iist'input'id'::,';,:.:,:ta"'.:,.'-;':,;'en'~'ur'e':,,'",:,,thAfterreviewingtheresultsoftroubleshootinganddiscussionswithWestinghouse,thefollowingisanoutlineofthecorrectiveactionsbeingtakenorplannedinresponsetothefeedwatercontrolinstabilityproblems(andADFCStransientresponseforsecondarysystemtransient):0ShortTermResponse:a)I&Ctechniciansloosenedandlubricatedtheactuatortostemconnectionblockforthe"8"FRV.b)OperationswasdirectedtoplacetheMainFRVbypassvalvesinfullopenpositionandinautomaticcontrol,toreducethefeedwatercontrolinstabilityproblem.c)ThepackingonbothFRVswasrelaxedtominimumtorque,toreduceanypotentialfrictionofthevalvestem.0IntermediateTermResponse:a)WestinghousehasevaluatedADFCS"tuningconstants"andhassuppliednewADFCSgainvalues,inanattempttoreducetheADFCSimpactonfeedwatercontrolinstabilityproblems.b)ThenewADFCSgainvalueshavebeeninstalledintheADFCSsoftware.Instabilityproblemshavenotbeeneliminatedasaresultofthesenewgainvalues.NRCForm366A(689)  
OFFICEOFMANACEMENT ANDBUDGET,WASHINGTON, DC20503.FACILITYNAME(1)DOCKETNUMBER(2)LERNUMBER(5)PACE(3)R.E.GinnaNuclearPowerPlantTEXT///ms/sspecs/ssc/s/NX/IIWAfldonelHRCFomI366A's/(17)osoo0244YEAR92'IxSEQUSNTIAI.
N.'PREVISION@.NUMSSIIc..SNUMSSII-006-015OFB~INTERMEDIATE CAUSES:hi'inui'il"!PRVi","',"'op'e'rati;:o'n","j,;:,::::::;::::,
Thi.ssituax<<ti.on resulted""'i:n inadvertent overfeeding ofthe"A"S/G.Itshouldalsobenotedherethatjustpriortothisevent,feedwater automatic controlhadbeenexperiencing instability withflowoscillations andtheoperators weresensitive toabnormalindication withADFCSinautomatic controloftheFRVs....<<?~cc<<mpxc<<<<Sq~
g<<I<<x<<"xc<<<<cs<<x<<S<<c>>.xsxc<<cS~ax<<Fpx<<<<S<<xq>
<<x+sSx<<m<<c
:,3:Qe'::.:p'ertur
'ax'ri'ops';,:p:.n:'map;xi,:":xeedpatser;';:pieaaer,,'::,;piessure Coxthxs'-transient-,.
when:,,;,Control.:,':;Roomk'operators:,;,.took i'"i-"!1""',:iiiiiiiii"'*IS!,:
"!ilia!ab'i'~~s'6,:!:p Lan'0';,i.
ass'ps~$Iss'ss':-.'I1C,ROOTCAUSE:,,er,:..::,.",:.ep.
"ebs':ve'::,."'@nvea:xga
'n::,".,e",,uner:'ygng,::,:cause 8>(hap'O'1'o's NRCForm366A(689)
I NRCFORM366A(669)FACILITYNAMEll)US.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORT(LER)TEXTCONTINUATION DOCKETNUMBERl2)APPROVEDOMBNO.31500)BEEXPIRES:E/30I92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REOUEST:50J)HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(PO30),U.S.NUCLEARAEGULATOAY COMMISSION, WASHINGTON, DC20555,ANDTO1HEPAPERWORK REDUCTION PROJECT(3)50OIOEI.
OFFICEOFMANAGEMENT ANDBUDGET.WASHINGTON, DC20503.PAGE(3)LERNUMBER(6)YEARIaISEOVENTIAL NVMEERREVISIONNUMBERR.E.GinnaNuclearPowerPlantTEXTllfroorp>>p>>o>>
bnqaked,Ir>>>>IEE)oo>>)HRC Forrrr3()SEBIl)T)osooo244920060106OF11IV>>ANALYSISOFEVENTThiseventisreportable inaccordance with10CFR50.73, LicenseeEventReportsystem,item(a)(2)(iv),
whichrequiresreporting of,"anyeventorcondition thatresultedinmanualorautomatic actuation ofanyEngineered SafetyFeature(ESF)including theReactorProtection System(RPS)".Thefeedwater isolation ofthe"A"S/Gwasanautomatic actuation ofanESFsystem.Anassessment wasperformed considering boththesafetyconsequences andimplications ofthiseventwiththefollowing resultsandconclusions:
Therewerenooperational orsafetyconsequences orimplications attributed tothefeedwater isolations because:oThefeedwater isolation signalsoccurredattherequiredS/Glevel.oTheplantwasquicklystabilized andmanualcontrolofFRVswasaccomplished tomitigateanyconsequences oftheevent.oAsthefeedwater isolation signalsoccurredasdesigned, theassumptions oftheFSARforsteamlinebreakweremet.Basedontheabove,itcanbeconcluded thatthepublic'shealthandsafetywasassuredatalltimes.V.CORRECTIVE ACTIONA>>ACTION,TAKENTORETURNAFFECTEDSYSTEMSTOPRE-EVENTNORMALSTATUS'AfterS/Glevelswerestabilized, theMainFRVswerereturnedtoautomatic control.NRCForm366A(689)
Ly NACFORM366A(689)FACILITYNAME(I)U.S.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORTILER)TEXTCONTINUATION OOCKFTNUMBER(2)APPROVEDOMSNO.31500104 EXPIAES:A/30/92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFOAMATION COLLECTION REQUEST:508)HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(F430),U.S.NUCLEARAEGULATORY COMMISSION, WASHINGTON.
DC20555,ANDTO1HEPAPERWORK REDUCTION PROJECT(31504)OI).
OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON, DC20503.PAGE(3)I.ERNUMBER(6)YEARQ@SEQUENTIAL
@gNUMSERREVISIONNUMBERR.E.GinnaNuclearPowerPlantTEXT///martt/rtat/tI/Vtrtr/vtt~/R/ant/NRC
%%dmISIJSAB/(17)osooo24492006-0107OFB~ACTIONTAKENORPLANNEDTOPREVENTRECURRENCE:
5'0:!;,':::;,:::;:Px/a Ypn:::::::::':::,::.::
FtnSILIx,i; tE(near!::,:.,:of('rIE,,ISnaIyj 3:,nipnet,:;-::lp h's(e'n':::;:::,::i'iist'input'id'::,';,:.:,:ta"'.:,.'-;':,;'en'~'ur'e':,,'",:,,th Afterreviewing theresultsoftroubleshooting anddiscussions withWestinghouse, thefollowing isanoutlineofthecorrective actionsbeingtakenorplannedinresponsetothefeedwater controlinstability problems(andADFCStransient responseforsecondary systemtransient):
0ShortTermResponse:
a)I&Ctechnicians loosenedandlubricated theactuatortostemconnection blockforthe"8"FRV.b)Operations wasdirectedtoplacetheMainFRVbypassvalvesinfullopenpositionandinautomatic control,toreducethefeedwater controlinstability problem.c)ThepackingonbothFRVswasrelaxedtominimumtorque,toreduceanypotential frictionofthevalvestem.0Intermediate TermResponse:
a)Westinghouse hasevaluated ADFCS"tuningconstants" andhassuppliednewADFCSgainvalues,inanattempttoreducetheADFCSimpactonfeedwater controlinstability problems.
b)ThenewADFCSgainvalueshavebeeninstalled intheADFCSsoftware.
Instability problemshavenotbeeneliminated asaresultofthesenewgainvalues.NRCForm366A(689)  


NRCFORM366A(689)UN.NUCLEARREGULATORYCOMMISSIONLICENSEEEVENTREPORTILER)TEXTCONTINUATIONAPPROVEDOMSNO.31500104EXPIRES4/30N2ESTIMATEDBURDENPERRESPONSETOCOMPLYWTHTHISINFORMATIONCOLLECTIONREOUEST:50.0HRS.FORWARDCOMMENTSREGARDINGBURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENTBRANCH(F830),U.S.NUCLEARREGULATORYCOMMISSION,WASHINGTON,DC20555,ANDTO1HEPAPERWORKREDUCTIONPROJECT(31500104).OFFICEOFMANAGEMENTANDBUDGET,WASHINGTON.OC20503.FACILITYNAME(IIDOCKETNUMBER(2)LEANUMBER(6)PAGE(3)VSARNISSOUSNTIAL3&#xc3;~$NUMSS4yx~gRSVISIONNUMSSRR.E.GinnaNuclearPowerPlantTEXTIIImorespsoaiarrrtu)red,u>>arJI(RuNJHRCFram35643)(17)05000244920060108OFc)DiagnostictestingofFRVperformancewascompletedBsi;:ng,":::,'::".:!t)Ie;:::,';:Fi:::::sher,.:::,,'::,Ficwscanni'ripAVAVsoQWAVAV4ISQSC'8N:::.::)Test:i.ngfocusedonvaj.veresponsetochangesincurrent-to-pneumatic(I/P)transducers,valvepositioners,andsolenoidsandassociatedinstrumentairtubing.0LongTermResponse:a)Valvecharacteristicdata(withandwithoutvalveshaftpackinginplace)willbereviewed.Stat;us.'.F':-",":.-;compl'etcb)ThevendorsoftheMainFRVactuatorandpositionerwillbeconsulted,requestingtheirrecommendationsforvalvepackingandpositioneroperation,basedonamoredetailedreviewofthediagnostictesting.c)ThecalibrationproceduresfortheMainFRVswillberevisedtoincludevalveresponsecharacteristicsduringscheduledcalibrations.d)B'C%tns;::,;:~X'-".:;!FL':,coe'ssN'gaO6'eX:kiig:-:::+OX'k';:hejueStjQ~.(EWR)4773willapplytheinformati.onobtainedfromotheractions,andisintendedtoenhancefeedwatercontrolandresponsetoplanttransients.Itisenvisionedthatimprovementswillbeobtainedinbothelectronicandpneumaticperformance,asaresultoftheseenhancements.8~4tiis,:.::,:;,.:::;;CompleteNACForm366A(689) 1;C  
NRCFORM366A(689)UN.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORTILER)TEXTCONTINUATION APPROVEDOMSNO.31500104EXPIRES4/30N2ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REOUEST:50.0HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(F830),U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON, DC20555,ANDTO1HEPAPERWORK REDUCTION PROJECT(31500104).
OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON.
OC20503.FACILITYNAME(IIDOCKETNUMBER(2)LEANUMBER(6)PAGE(3)VSARNISSOUSNTIAL 3&#xc3;~$NUMSS4yx~gRSVISIONNUMSSRR.E.GinnaNuclearPowerPlantTEXTIIImorespsoaiarrrtu)red, u>>arJI(RuNJ HRCFram35643)(17)05000244920060108OFc)Diagnostic testingofFRVperformance wascompleted Bsi;:ng,":::,'::".:!t)Ie;:::,';:Fi:::::sher,.:::,,'::,Ficwscanni
'ripAVAVsoQWAVAV4ISQSC'8N:::.::)
Test:i.ng focusedonvaj.veresponsetochangesincurrent-to-pneumatic (I/P)transducers, valvepositioners, andsolenoids andassociated instrument airtubing.0LongTermResponse:
a)Valvecharacteristic data(withandwithoutvalveshaftpackinginplace)willbereviewed.
Stat;us.'.F':-",":.-;compl'etc b)ThevendorsoftheMainFRVactuatorandpositioner willbeconsulted, requesting theirrecommendations forvalvepackingandpositioner operation, basedonamoredetailedreviewofthediagnostic testing.c)Thecalibration procedures fortheMainFRVswillberevisedtoincludevalveresponsecharacteristics duringscheduled calibrations.
d)B'C%tns;::,;:~X'-".:;!FL':,
coe'ssN'gaO6'eX:kiig:-:::+OX'k';:hejueStjQ~.
(EWR)4773willapplytheinformati.on obtainedfromotheractions,andisintendedtoenhancefeedwater controlandresponsetoplanttransients.
Itisenvisioned thatimprovements willbeobtainedinbothelectronic andpneumatic performance, asaresultoftheseenhancements.
8~4tiis,:.::,:;,.:::;;Complete NACForm366A(689) 1;C  


I NRCFORM366A(64)9)FACILITYNAME(I)UcLNUCLEARREGULATORYCOMMISSIONLICENSEEEVENTREPORT(LER)TEXTCONTINUATIONDOCKETNUMBER(2)APPROVEDOMBNO.31500104EXPIRESI4/30/92ESTIMATEDBURDENPERRESPONSETOCOMPLYWTHTHISINFORMATIONCOLLECTIONREOUESTI50.0HRS.FORWARDCOMMENTSREGARDINGBURDENFSTIMATETOTHERECORDSANDREPORTSMANAGEMENTBRANCH(P4't30),U.S.NUCLEARREGULATORYCOMMISSION,WASHINGTON,DC20555,ANDTO1HEPAPERWORKREDUCTIONPRO)ECT(3)504)104).OFFICEOFMANAGEMENTANDBUDGET,WASHINGTON.OC20503.PAGE(3)LERNUMBER(6)YEARSEOUENTIAL~Cv?.ciNUMSERREVISIONNUMSERR.EDGinnaNuclearPowerPlantTEXT/lfmove<<teoo/4wctu/voc/uoeor/I/lr/ono/HRCform3//6AB/((7)0500024492-0060110OF11"A."''"'Hi'iFVjPRV<('SbOPted!geedQyter')',',:CventeO3(.::XnSMbX'l'XCXe'aZlleBP:..'::3;HStBD3;I3:3;4'3PS~),.gent.9',9V~vvg~ct999v<tc9~<,,ckQ<"~Pxvtvc3"Icd"t.'-bb"''1~E"4'cvvviiav7MvcotOeccv.'OvtcccvvvcoeccctvtvoVw'vi9vix9IVN(498vh%w'vet4CIvv9)9vSSvv9999&hv8319ecevocIt,98eveC4vTv988(9t&yg899CVecovevx'$~'vAlO'~~tritePggttevttcvttCVSV9vvc.ttS'949cccc$~IvlxgSippd>':op~6xi;::,:pbiijYrait<<;.ivy;s':,:,::,'-:::ippbjijed';,p5p4',:;'.:::Cmthjx',,:.':t'~'j'1'-,'.--.,",",,:...,.'.,"-85'-."""81:-'-'-'.::et!it:'-",*::::::::I':"::":.'.eel(I:-':"tK'--"""'-'-:-::-.::::::i:enban'ol'8')'8'yeEetc'lit'ebebil'i',iyq%oonbc"oL!l~088"'),"',::;!,-.;,",:::,":,,")IePlice',:,-::tbe"I!!X'!,::FRV~)to'8idionsz,~toi'ij'iih;:::,-:yi'LII'8o,::,.;".;:;-:;::";,::hcn9L(81'Xe'llei8~6:<<'::,',:,ll:NRCForm388A(669)  
I NRCFORM366A(64)9)FACILITYNAME(I)UcLNUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORT(LER)TEXTCONTINUATION DOCKETNUMBER(2)APPROVEDOMBNO.31500104EXPIRESI4/30/92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REOUESTI50.0HRS.FORWARDCOMMENTSREGARDING BURDENFSTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(P4't30),
U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON, DC20555,ANDTO1HEPAPERWORK REDUCTION PRO)ECT(3)504)104).
OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON.
OC20503.PAGE(3)LERNUMBER(6)YEARSEOUENTIAL
~Cv?.ciNUMSERREVISIONNUMSERR.EDGinnaNuclearPowerPlantTEXT/lfmove<<teoo/4wctu/voc/
uoeor/I/lr/ono/HRC form3//6AB/((7)0500024492-0060110OF11"A."''"'Hi'iFVjPRV<('SbOPted!geedQy ter')',',:CventeO3
(.::XnSMbX'l'XCXe'a ZlleBP:..'::3;HStBD3;I3:3;4'3 PS~),.gent.9',9V~vvg~ct999v<tc9~<,,
ckQ<"~Pxvtvc3"Icd"t.'-bb"''1~E"4'cvvviiav7MvcotOeccv
.'OvtcccvvvcoeccctvtvoVw'vi9vix9 IVN(498vh%w'vet4CI vv9)9vSSvv9999&hv8319ecevoc It,98eveC4v Tv988(9t&yg899CVecovevx'$~'vA lO'~~trite Pggttevttcvtt CVSV9vvc.ttS'949cccc$~IvlxgSippd>':op~6xi;::,:pbiijYrait<<;.ivy;s':
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~088"'),"',::;!,-.;,",:::,":,,")IeP lice',:,-::tbe"I!!X'!,::FRV~)to'8 idionsz,~toi'ij'iih;:::,-:yi'LII'8 o,::,.;".;:;-:;::";,::hc n9L(81'Xe'llei8~6:<<'::,',:,ll:
NRCForm388A(669)  


NRCFORM366A(64)9)U.S.NUCLEARREGULATORYCOMMISSIONLICENSEEEVENTREPORT{LER)TEXTCONTINUATIONAPPROVEOOMBNO.31500104EXPIRES(4130(92ESTIMATEDBURDENPERRESPONSETOCOMPLYWTHTHISINFORMATIONCOLLECTIONREQUEST:500HRS.FORWARDCOMMENTSREGARDINGBURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENTBRANCH(P430),U.S.NUCLEARREGULATORYCOMMISSION,WASHINGTON,DC20555,ANDTO1HEPAPERWORKREDUCTIONPROJECT(31600104).OFFICEOFMANAGEMENTANDBUDGET,WASHINGTON,DC20503.FACILITYNAME(1)DOCKETNUMBER(2)LERNUMBER(8)YEAR1++:SEQUENTIAL,RNREVISIONKaC:NUMSERW'ZSNUMSERPAGE(3)R.E.GinnaNuclearPowerPlantTEXTNmoveEP444JEmqU)mILII4446tfhkxnslHRCFsmI36643)((T)0500020611oF11VZ~ADDITIONALZNFORMATIONAeFAILEDCOMPONENTS:B~None.PREVIOUSLERsONSIMILAREVENTS:AsimilarLEReventhistoricalsearchwasconductedwiththefollowingresults:LER91-009wasasimilareventwithadifferentrootcause.C~SPECIALCOMMENTS:None.NRCFomI368A(669) 04}}
NRCFORM366A(64)9)U.S.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORT{LER)TEXTCONTINUATION APPROVEOOMBNO.31500104EXPIRES(4130(92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REQUEST:500HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(P430),U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON, DC20555,ANDTO1HEPAPERWORK REDUCTION PROJECT(31600104).
OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON, DC20503.FACILITYNAME(1)DOCKETNUMBER(2)LERNUMBER(8)YEAR1++:SEQUENTIAL,RN REVISIONKaC:NUMSERW'ZSNUMSERPAGE(3)R.E.GinnaNuclearPowerPlantTEXTNmoveEP444JEmqU)mILII4446tfhkxnsl HRCFsmI36643)((T)0500020611oF11VZ~ADDITIONAL ZNFORMATION AeFAILEDCOMPONENTS:
B~None.PREVIOUSLERsONSIMILAREVENTS:AsimilarLEReventhistorical searchwasconducted withthefollowing results:LER91-009wasasimilareventwithadifferent rootcause.C~SPECIALCOMMENTS:
None.NRCFomI368A(669) 04}}

Revision as of 13:00, 29 June 2018

LER 92-006-01:on 920518,main FW Isolations Occurred on SG a Due to Overfeeding SG a While in Manual Control.Caused by Heater Drain Tank Level Control Sys Problem.Administrative Controls Instituted to Ensure Valve Not Open
ML17263A345
Person / Time
Site: Ginna Constellation icon.png
Issue date: 07/29/1993
From: BACKUS W H
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17263A344 List:
References
LER-92-006, LER-92-6, NUDOCS 9308090332
Download: ML17263A345 (22)
v • d • e


Text

NRCFORM366(64)9)V.S.NUCLEARREGULATORY COIBMISSION LlCENSEEEVENTREPORT(LER)APPAOVEDOMBNO.31504)(04 EXPIRES:4/30/92ESTIMATED BUADENPERRESPONSETOCOMPLYWTHTHISINFOAMA'TION COLLECTION REQVEST:50.0HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(P630),V.S,NUCLEARREGULATORY COMMISSION, WASHINGTON, DC20555.ANDTOTHEPAPERWORK REDUCTION PROJECT(31500104).

OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON.

DC20503.FACILITYNAME(I)R.E.GinnaNuclearPowerPlantDOCKETNUMBER(2IPAE3a5oao24410F11Feedwater ControlPerturbations, DuetoaSecondary Transient, CausesSteamGenerator HighLevelFeedwater Isolations EVENTDATE(5)LERNUMBER(6IREPORTDATE(7)OTHERFACILITIES INVOLVED(6)MONTHDAYYEARYEAR@I(SEQUENTIAL NUMBERy+iy~RBV6~MONTHPFiNUMBEROAYYEARFACILITYNAMESDOCKETNUMBERISI 05000051892920060107299305000OPERATING MODE(9)POWERLEVEL09'"844~WfE<~::

20.402(B) 20.405(e)(1)(l) 20.405(vill)

(ill20.405(~I(1)Bill20.405(e)

(Il(lv)20.405(cl (1I(vl20.40S(c) 5026(cl(l

)50.35(c)12) 50.73(~I(2)II)50.73(~l(2)ill)50.73(cl(2)

BillX60.73(c)(2)(iv) 50.73(c)(2)(v)50.73(el(21(vill50.73(cl(2)(vill)IA)50.73(~)(2)(villI~(6)50.'13(cu2)(c)

LICENSEECONTACTFORTHISI.ER(12)THISREPORTISSUBMITTED PURSUANTTOTHEREQUIREMENTS OF10CFA((:/CheekoneormoreofthefoliowinPl l11)73.71(bl73.71(clOTHER/SpecifyinAbttieCtbelowerxflnText,h/RCForm34$4/NAMEMesleyH.BackusTechnical Assistant totheOperations ManagerTELEPHONE NUMBERAREACODE315524-'446COMPLETEONELINEFOREACHCOMPONENT FAILUREOESCRIBEO INTHISREPORTl13)CAUSESYSTEMCOMPONENT MANUFACTURERREPORTABLE TONPRDSc.:i3Nqz~.'Li

')3~6g~PCAUSESYSTEMCOMPONENT MANVFAC.TUAEREPORTABLE TQNPRDS48)WN):yccSVPPLEMENTAL REPORTEXPECTED(14)XNOYES/lfyet,completeEXPECTEDSV84(ISSIDh/

DATE/EXPECTEDSUBMISSION DATEIISIMONTHOAYYEARABsTRAcT/Limitto/etx)cpecer,l.e.,epproxlmetely fifteenrinpieIpecetypewritten Ennl(16)OnMay18,1992atapproximately 1339EDST,withtheReactoratapproximately 974fullpower,MainFeedwater Isolations occurredonthe"A"SteamGenerator (S/G).Thesefeedwater isolations werecausedbyoverfeeding the"A"S/Gwhileinmanualcontrol,following asecondary systempressuretransient.

Immediate operatoractionwastomanuallycontroltheMainFeedwater Regulating Valves(FRV)toreducethesteamgenerator waterlevelsandstabilize theplant.Theimmediate causeoftheeventisduetoasecondary systempressuretransient.

Corrective actionstakenorplannedarediscussed inSectionVofthetext.9308090332 930729PDR(BIDDCK050002448PDRNRCForm366(669) l NRCFORM366A(649)US.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORTILER)TEXTCONTINUATION APPROVED0MBNO.3150dl0iEXPIRES:4/30/92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLFCTION REQUEST:50A)HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANOREPORTSMANAGEMENT BRANCH(P430),U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON, DC20555,ANDTOTHEPAPERWORK REDUCTION PROJECT(31500104),

OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON, DC20503.FACILITYNAMEl'llDOCKETNUMBER(2)LERNUMBER(6)YEARWRSEQUENTIAL 0/6IIEVISION EAR@~NUMSBNY>>NUMBEIIPAGE(3)R.E.GinnaNuc1earPowerP1antTEXTflfII>>me>>co/Jmvvtmd,v>>>>//I/oI>>/NRC FomI38SABI(IT)osooo2"492006010"2OFI~PREEVENTPLANTCONDITIONS Theplantwasatapproximately 974steadystatepowerwithnomajoractivities inprogress.

Instrument andControl(I&C)Department personnel wereinvestigating theAdvancedDigitalFeedwater ControlSystem(ADFCS)duetosomefeedwater oscillations thathadoccurredatapproximately 1110EDST,May18,1992.Thesefeedwater oscillations werebeingcausedbythe"A"and"B"SteamGenerator (S/G)MainFeedwater Regulating Valves(FRVs)cycling(between43%and484),attwicetheirnormalfrequency andinoppositephasefromeachother.Thisfeedwater response(instability whileinautomatic control)wasnewandunexpected bytheoperators.

I1~DESCRIPTION OFEVENTA>>DATESANDAPPROXIMATE TIMESOFMAJOROCCURRENCES' May18,1992,1337EDST:ASecondary SideTransient occurs.oMay18,1992,1339EDST:EventDateandApproximate Time.0May18,1992,1339EDST:Discovery DateandApproximate Time.0May18,1992,1342EDST:ControlRoomoperators restoreS/GlevelstonormalandplaceMainFRVsinautomatic.

NRCFomI366A(689)

~1 NRCFORM356A(64)9)US.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORT(LER)TEXTCONTINUATION APPAOVEOOMBNO.31500104EXPIRES'/30)92 ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REQUEST:50J>HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHEAECOADSANDREPORTSMANAGEMENT BRANCHIP430).U.S.NUCLEARAEGULATORY COMMISSION, WASHINGTON, DC20555,ANDTO1HEPAPERWORK REDUCTION PROJECT(31504>104>.

OFFICEOFMANAGEMENT ANDBUDGET.WASHINGTON, OC20503,FACILITYNAME(1IDOCKETNUMBER(2)YEARLERNUMBER(5)SEOVENTIAL NVMeER~o):REVISION))BSNUMERPAGE(3)R.E.GinnaNuclearPowerPlantTEXTPfmom<<>>o>>bmqu)fed,u>>JSBu>>JHRC FomI35543)(12)050002060B~EVENT:OnMay18,1992,atapproximately 1337EDST,withtheReactoratapproximately 974fullpower,asecondary sidecondensate systemdecreasing pressuretransient occurred.

Thispressuredecreasetraveledthroughout theentiresecondary sideandwasreflected aslowfeedwater headerpressureandcorresponding decreaseindifferential pressureacrossbothFRVs.TheADFCSresponded tothelowfeedwater headerpressurebyincreasing theopendemandsignaltothemainFRVsinordertomaintaintheproperfeedwaterflow.At,:::Mhi.'s'g~)::;same@~t"ime$

>.:;,":,::.:,:fh'e"';:;,:",:;'.2!C1>:

observing thatthemainFRVsopendemandsignalswerehigherthannormalandincreasing, andthatfeedwater flowtothe"BL(S/Gwashigherthanappropriate, tookmanualcontroloftheMainFRVstopreventfurtheropeningofthevalves.Eo'eaai>>'"

eiahea'e'"'i.,::aP'z4~ss ii'aa".:)'he ControlRoomoperators manuallyrestoredS/Glevelstonormal,andatapproximately 1342EDSTrestoredthe"A"and"B"MainFRVstoautomatic control.NACForm3SSA(689)

I NRCFORM3$5A(689)UA.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORTILER)TEXTCONTINUATION APPROVEDOMBNO.31504)0eEXPIRES:e/30/92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REQUEST:50A>HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(F430).U.S.NUCLEARREGULATORY COMMISSION.

WASHINGTON, OC20555,ANDTO1HEPAPERWORK REDUCTION PROJECT(31500104),

OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON, DC20503.FACILITYNAME(1)R.E.GinnaNuclearPowerPlantTEXT///movee/veoe/en/vvtved,Ivee////Ooe~NRCFovm3/ISAB/(IT)DOCKETNUMBER(2)osooo244YEAR92I.ERNUMBER(5)SEQUENTIAL

~lPREVSIONNUMSER4v?NUMIER00601PAGE(3)04pFCDINOPERABLE STRUCTURESP COMPONENTSP ORSYSTEMSTHATCONTRIBUTED TOTHEEVENT:None.DeOTHERSYSTEMSORSECONDARY FUNCTIONS AFFECTED:

None.EDMETHODOFDISCOVERY:

Theeventwasimmediately apparentduetoalarmsandindications intheControlRoom.OPERATORACTION:TheControlRoomoperators tookimmediate manualactionstocontrolS/Glevelsandstabilize theplant.Subsequently, theControlRoomoperators notifiedhighersupervision andtheNuclearRegulatory Commission per10CFR50.72,Non-Emergency, 4hourNotification.

GeSAFETYSYSTEMRESPONSES:

The"A"S/GMainFRVbegantocloseautomatically asaresultofthefeedwater isolation signal.Duetotheshortdurationthatthesignalwaspresent,thevalveneverfullyclosed.IIZ~CAUSEOFEVENTAeIMMEDIATE CAUSE:Thefeedwater isolation signaltothe"A"S/GMainFRVwasduetothe"A"S/Gnarrowrangelevelbeing>/=67%.NRCFovm386A(669)

NRCFORM366A~(669)UN.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORTILER)TEXTCONTINUATION APPROVEDOMSNO.3I500104EXPIRES:4/30/92ESTIMATED SURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REQUEST:60.0HRS.FORWARDCOMMENTSREGARDINC BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT SRANCH(P430),U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON.

DC20555,ANDTOTHEPAPERWORK REDUCTION PROJECT(3150@104),

OFFICEOFMANACEMENT ANDBUDGET,WASHINGTON, DC20503.FACILITYNAME(1)DOCKETNUMBER(2)LERNUMBER(5)PACE(3)R.E.GinnaNuclearPowerPlantTEXT///ms/sspecs/ssc/s/NX/IIWAfldonelHRCFomI366A's/(17)osoo0244YEAR92'IxSEQUSNTIAI.

N.'PREVISION@.NUMSSIIc..SNUMSSII-006-015OFB~INTERMEDIATE CAUSES:hi'inui'il"!PRVi","',"'op'e'rati;:o'n","j,;:,::::::;::::,

Thi.ssituax<<ti.on resulted""'i:n inadvertent overfeeding ofthe"A"S/G.Itshouldalsobenotedherethatjustpriortothisevent,feedwater automatic controlhadbeenexperiencing instability withflowoscillations andtheoperators weresensitive toabnormalindication withADFCSinautomatic controloftheFRVs....<<?~cc<<mpxc<<<<Sq~

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when:,,;,Control.:,':;Roomk'operators:,;,.took i'"i-"!1""',:iiiiiiiii"'*IS!,:

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I NRCFORM366A(669)FACILITYNAMEll)US.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORT(LER)TEXTCONTINUATION DOCKETNUMBERl2)APPROVEDOMBNO.31500)BEEXPIRES:E/30I92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REOUEST:50J)HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(PO30),U.S.NUCLEARAEGULATOAY COMMISSION, WASHINGTON, DC20555,ANDTO1HEPAPERWORK REDUCTION PROJECT(3)50OIOEI.

OFFICEOFMANAGEMENT ANDBUDGET.WASHINGTON, DC20503.PAGE(3)LERNUMBER(6)YEARIaISEOVENTIAL NVMEERREVISIONNUMBERR.E.GinnaNuclearPowerPlantTEXTllfroorp>>p>>o>>

bnqaked,Ir>>>>IEE)oo>>)HRC Forrrr3()SEBIl)T)osooo244920060106OF11IV>>ANALYSISOFEVENTThiseventisreportable inaccordance with10CFR50.73, LicenseeEventReportsystem,item(a)(2)(iv),

whichrequiresreporting of,"anyeventorcondition thatresultedinmanualorautomatic actuation ofanyEngineered SafetyFeature(ESF)including theReactorProtection System(RPS)".Thefeedwater isolation ofthe"A"S/Gwasanautomatic actuation ofanESFsystem.Anassessment wasperformed considering boththesafetyconsequences andimplications ofthiseventwiththefollowing resultsandconclusions:

Therewerenooperational orsafetyconsequences orimplications attributed tothefeedwater isolations because:oThefeedwater isolation signalsoccurredattherequiredS/Glevel.oTheplantwasquicklystabilized andmanualcontrolofFRVswasaccomplished tomitigateanyconsequences oftheevent.oAsthefeedwater isolation signalsoccurredasdesigned, theassumptions oftheFSARforsteamlinebreakweremet.Basedontheabove,itcanbeconcluded thatthepublic'shealthandsafetywasassuredatalltimes.V.CORRECTIVE ACTIONA>>ACTION,TAKENTORETURNAFFECTEDSYSTEMSTOPRE-EVENTNORMALSTATUS'AfterS/Glevelswerestabilized, theMainFRVswerereturnedtoautomatic control.NRCForm366A(689)

Ly NACFORM366A(689)FACILITYNAME(I)U.S.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORTILER)TEXTCONTINUATION OOCKFTNUMBER(2)APPROVEDOMSNO.31500104 EXPIAES:A/30/92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFOAMATION COLLECTION REQUEST:508)HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(F430),U.S.NUCLEARAEGULATORY COMMISSION, WASHINGTON.

DC20555,ANDTO1HEPAPERWORK REDUCTION PROJECT(31504)OI).

OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON, DC20503.PAGE(3)I.ERNUMBER(6)YEARQ@SEQUENTIAL

@gNUMSERREVISIONNUMBERR.E.GinnaNuclearPowerPlantTEXT///martt/rtat/tI/Vtrtr/vtt~/R/ant/NRC

%%dmISIJSAB/(17)osooo24492006-0107OFB~ACTIONTAKENORPLANNEDTOPREVENTRECURRENCE:

5'0:!;,':::;,:::;:Px/a Ypn:::::::::':::,::.::

FtnSILIx,i; tE(near!::,:.,:of('rIE,,ISnaIyj 3:,nipnet,:;-::lp h's(e'n':::;:::,::i'iist'input'id'::,';,:.:,:ta"'.:,.'-;':,;'en'~'ur'e':,,'",:,,th Afterreviewing theresultsoftroubleshooting anddiscussions withWestinghouse, thefollowing isanoutlineofthecorrective actionsbeingtakenorplannedinresponsetothefeedwater controlinstability problems(andADFCStransient responseforsecondary systemtransient):

0ShortTermResponse:

a)I&Ctechnicians loosenedandlubricated theactuatortostemconnection blockforthe"8"FRV.b)Operations wasdirectedtoplacetheMainFRVbypassvalvesinfullopenpositionandinautomatic control,toreducethefeedwater controlinstability problem.c)ThepackingonbothFRVswasrelaxedtominimumtorque,toreduceanypotential frictionofthevalvestem.0Intermediate TermResponse:

a)Westinghouse hasevaluated ADFCS"tuningconstants" andhassuppliednewADFCSgainvalues,inanattempttoreducetheADFCSimpactonfeedwater controlinstability problems.

b)ThenewADFCSgainvalueshavebeeninstalled intheADFCSsoftware.

Instability problemshavenotbeeneliminated asaresultofthesenewgainvalues.NRCForm366A(689)

NRCFORM366A(689)UN.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORTILER)TEXTCONTINUATION APPROVEDOMSNO.31500104EXPIRES4/30N2ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REOUEST:50.0HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(F830),U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON, DC20555,ANDTO1HEPAPERWORK REDUCTION PROJECT(31500104).

OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON.

OC20503.FACILITYNAME(IIDOCKETNUMBER(2)LEANUMBER(6)PAGE(3)VSARNISSOUSNTIAL 3Ã~$NUMSS4yx~gRSVISIONNUMSSRR.E.GinnaNuclearPowerPlantTEXTIIImorespsoaiarrrtu)red, u>>arJI(RuNJ HRCFram35643)(17)05000244920060108OFc)Diagnostic testingofFRVperformance wascompleted Bsi;:ng,":::,'::".:!t)Ie;:::,';:Fi:::::sher,.:::,,'::,Ficwscanni

'ripAVAVsoQWAVAV4ISQSC'8N:::.::)

Test:i.ng focusedonvaj.veresponsetochangesincurrent-to-pneumatic (I/P)transducers, valvepositioners, andsolenoids andassociated instrument airtubing.0LongTermResponse:

a)Valvecharacteristic data(withandwithoutvalveshaftpackinginplace)willbereviewed.

Stat;us.'.F':-",":.-;compl'etc b)ThevendorsoftheMainFRVactuatorandpositioner willbeconsulted, requesting theirrecommendations forvalvepackingandpositioner operation, basedonamoredetailedreviewofthediagnostic testing.c)Thecalibration procedures fortheMainFRVswillberevisedtoincludevalveresponsecharacteristics duringscheduled calibrations.

d)B'C%tns;::,;:~X'-".:;!FL':,

coe'ssN'gaO6'eX:kiig:-:::+OX'k';:hejueStjQ~.

(EWR)4773willapplytheinformati.on obtainedfromotheractions,andisintendedtoenhancefeedwater controlandresponsetoplanttransients.

Itisenvisioned thatimprovements willbeobtainedinbothelectronic andpneumatic performance, asaresultoftheseenhancements.

8~4tiis,:.::,:;,.:::;;Complete NACForm366A(689) 1;C

I NRCFORM366A(64)9)FACILITYNAME(I)UcLNUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORT(LER)TEXTCONTINUATION DOCKETNUMBER(2)APPROVEDOMBNO.31500104EXPIRESI4/30/92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REOUESTI50.0HRS.FORWARDCOMMENTSREGARDING BURDENFSTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(P4't30),

U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON, DC20555,ANDTO1HEPAPERWORK REDUCTION PRO)ECT(3)504)104).

OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON.

OC20503.PAGE(3)LERNUMBER(6)YEARSEOUENTIAL

~Cv?.ciNUMSERREVISIONNUMSERR.EDGinnaNuclearPowerPlantTEXT/lfmove<<teoo/4wctu/voc/

uoeor/I/lr/ono/HRC form3//6AB/((7)0500024492-0060110OF11"A.""'Hi'iFVjPRV<('SbOPted!geedQy ter')',',:CventeO3

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NRCForm388A(669)

NRCFORM366A(64)9)U.S.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORT{LER)TEXTCONTINUATION APPROVEOOMBNO.31500104EXPIRES(4130(92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REQUEST:500HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(P430),U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON, DC20555,ANDTO1HEPAPERWORK REDUCTION PROJECT(31600104).

OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON, DC20503.FACILITYNAME(1)DOCKETNUMBER(2)LERNUMBER(8)YEAR1++:SEQUENTIAL,RN REVISIONKaC:NUMSERW'ZSNUMSERPAGE(3)R.E.GinnaNuclearPowerPlantTEXTNmoveEP444JEmqU)mILII4446tfhkxnsl HRCFsmI36643)((T)0500020611oF11VZ~ADDITIONAL ZNFORMATION AeFAILEDCOMPONENTS:

B~None.PREVIOUSLERsONSIMILAREVENTS:AsimilarLEReventhistorical searchwasconducted withthefollowing results:LER91-009wasasimilareventwithadifferent rootcause.C~SPECIALCOMMENTS:

None.NRCFomI368A(669) 04

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