ML17261A138: Difference between revisions

From kanterella
Jump to navigation Jump to search
(Created page by program invented by StriderTol)
(Created page by program invented by StriderTol)
Line 17: Line 17:


=Text=
=Text=
{{#Wiki_filter:U.S.NUCLEARREGULATORYCOMMISSION79-016/01T-0LICENSEEEVENTREPORT(CAR1231)Q)(PLEASEPRINTORTYPEALLREQUIREDINFORMATION)60000000Q341111Q4~QsLICENSENUMBER2526LICENSETYPE3057CAT58NRCFOQM366{7.7I+CONTROLBLOCK:INYREG1Q2009LICENSEECODE1415~078CON'T~0178soURcE~LQB050002447080479QB081679Qe6061DOCKETNUMBEREVENTDATE7475REPORTDATE80EVENTDESCRIPTIONANDPROBABLECONSEQUENCESQ10Followingamaintenanceoutaeandrestorationofcriticalita14hr.intervalofreac-~03toroperationlapsedpriortoatripduringtriptesting,inwhichA.C.powerwasonforaccumuinjectionMOV'sandRWSTdeliverytoRHRMOV.(T.S.3.3.1.1g).Thiscon-ditionwasnotedduringprecriticalcheckoffperformanceaftertriptesting.Valves~06~08wereinpropersafeguardpositionduringthisintervalofoperation.Before14hr.intervalcktbkrpositionshadbeenreportedbutcheckoffdidnotdirectrepositioning.Cktbkrswererecheckedba2ndoeratoronbasisofoerabilitforalinmentsandnothingunusualwasreported.Controloperatorcompletedprocedureassumingpre-criticalrequirementwasfulfilled.8078~oeSYSTEMCAUSECAUSECOMP.VALVECODECODFSUBCODECOMPONENTCODESUBCODESUBCODERQll~DQ12~ZQ13CKTBRKQE~AQls~ZQs78910111213181920SEQUENTIALOCCURRENCEREPORTREVISIONLERiROEVENTYEARREPORTNO.CODETYPENO.Q17REPQRT~79~~010~W~01~T~~021222324262728293031ACTIONFUTUREEFFECTSHUTDOWNATTACHMENTNPRDQPRIMECOMP,COMPONENTTAKENACTIONONPLANTMETHODHOURSQ22SUBMITTEDFORMSUB.SUPPLIERMANUFACTURER~GQlg~HQlg~ZQEo~ZQET0000~YQ33~NQ34~NQEsW120QER3334353637404142434447CAUSEDESCRIPTIONANDCORRECTIVEACTIONSQ270Unclearprecriticalcheckoffprocedure.Cktbkrsforthesevalvesareclosedforpre-startuplineupandstrokingduringheatup.Laterprecriticalcheckoffspecifiesvalvepositionwithcktbkr"open"whilecktbkrpanelmarked"on"and"off."Thereisno3directiontorepositioncktbkr.A.C.powerwasremoved.Checkoffwaschangedtodirectrepositioningandtogiveconsistentnomenclature.On-shifttrainingonpowerremovalreuirementwasheldandfuhtaiib789FACILITYSTATUS%POWEROTHERSTATUS)6C280002eNAMETHODOFDISCOVERYDISCOVERYDESCRIPTIONQ32LJQ3)Performingpre-criticalrocedure4546LOCATIONOFRELEASE36NACClMQ~QACTIVITYCONTENTRELEASEDOFRELEASEAMOUNTOFACTIVITYQQ33ZQ34NA789101144PERSONNELEXPOSURESNUMBERTYPEDESCRIPTIONQ3e7~000Q37ZQ33NA789111213PERSONNELINJURIES789II12LOSSOFORDAMAGETOFACILITY43TYPEDESCRIPTIONe~zQ42NA8910PUBLICITYISSUEDDESCRIPTIONo~NQ44NA8910804580808090821O5Z80NRCUSEONLY80NAMEOFPREPARERCarlH.Peck686980oPHQNE716/'546-2700,ext.291-205 0
{{#Wiki_filter:U.S.NUCLEARREGULATORY COMMISSION 79-016/01T-0 LICENSEEEVENTREPORT(CAR1231)Q)(PLEASEPRINTORTYPEALLREQUIREDINFORMATION) 60000000Q341111Q4~QsLICENSENUMBER2526LICENSETYPE3057CAT58NRCFOQM366{7.7I+CONTROLBLOCK:INYREG1Q2009LICENSEECODE1415~078CON'T~0178soURcE~LQB050002447080479QB081679Qe6061DOCKETNUMBEREVENTDATE7475REPORTDATE80EVENTDESCRIPTION ANDPROBABLECONSEQUENCES Q10Following amaintenance outaeandrestoration ofcriticalit a14hr.intervalofreac-~03toroperation lapsedpriortoatripduringtriptesting,inwhichA.C.powerwasonforaccumuinjection MOV'sandRWSTdeliverytoRHRMOV.(T.S.3.3.1.1g).
AttachmenttoLER79-016/01T-0RochesterGasandElectricCorporationR.E.GinnaNuclearPowerPlant,UnitNo.1DocketNo.50-244AfteramaintenanceoutagethereactorwastakencriticalAugust4,1979at0425hours.Laterthatdayturbinetriptestingwasperformedinaccordancewiththemanufacturer'srecommendations,andduringthisareactortripoccurred,at1824hours.Duringperformanceoftherestartpre-criticalcheckoffithadbeendiscoveredthattheA.C.powerwas"on"forsafetyinjectionaccumulatorinjectionvalvesMOV-841andMOV-865andtherefuelingwaterstoragetankdeliverytoresidualheatremovalpumpsuctionvalveMOV-856.ThisindicatedthatafourteenhourintervalhadelapsedinwhichthereactorhadbeenmadecriticalandwasoperatedwiththeA.C.poweravailabletothesevalvescontrarytoPlantTechnicalSpeci-ficationswhichrequireA.C.powertoberemoved.Duringthatinterval,however,thevalveswereintheirpropersafeguardspositionandwouldhaveperformedtheirintendedfunction.Investigationrevealedthat,asaresultoftheprecriticalcheckforthefirststartup,thecircuitbreakerpositionsforthevalveshadbeenreported,butsincetheprecriticalcheckoffdidnotdirectchangingthebreakerpositions,theywerenotimmediatelyrepositioned.Thesepositionswerenecessarytooperatethesevalvestoestablishproperalignmentforsafeguardsoperationpriortoheatupandforvalvestrokingduringtheheatup.Anotheroperatorwaslaterorderedtocheckthebreakerstatusforthesevalves.Heviewedtheirconditionasnormalforoperability,reportednothingunusual,anddidnotrepositionthemforremovalofA.C.power.Further,theprecriticalcheckoffintroducedconfusiontooperatorsbyspecifyingthatthebreakersaretobe"open"whilethebreakerpanelsaremarked"on"and"off."TheprecriticalcheckoffhasbeencorrectedtodirectrepositioningofcircuitbreakerswhereremovalofA.C.powerisrequiredbeforereactorcriticality,andtoprovidenomenclatureconsistenttothebreakerpanels.Inaddition,theOperationsEngineerinstructedeachshifttoconducton-'shiftdiscussionsontherequirementforremovalofA.C.powertothesevalves.Furtherformalclassroomtrainingdevotedtothisrequirementhasbeeninitiatedfortheoperatorsintheirregularlyscheduledtrainingperiods.
Thiscon-ditionwasnotedduringprecritical checkoffperformance aftertriptesting.Valves~06~08wereinpropersafeguard positionduringthisintervalofoperation.
Before14hr.intervalcktbkrpositions hadbeenreportedbutcheckoffdidnotdirectrepositioning.
Cktbkrswererechecked ba2ndoeratoronbasisofoerabilitforalinmentsandnothingunusualwasreported.
Controloperatorcompleted procedure assumingpre-criticalrequirement wasfulfilled.
8078~oeSYSTEMCAUSECAUSECOMP.VALVECODECODFSUBCODECOMPONENT CODESUBCODESUBCODERQll~DQ12~ZQ13CKTBRKQE~AQls~ZQs78910111213181920SEQUENTIAL OCCURRENCE REPORTREVISIONLERiROEVENTYEARREPORTNO.CODETYPENO.Q17REPQRT~79~~010~W~01~T~~021222324262728293031ACTIONFUTUREEFFECTSHUTDOWNATTACHMENT NPRDQPRIMECOMP,COMPONENT TAKENACTIONONPLANTMETHODHOURSQ22SUBMITTED FORMSUB.SUPPLIERMANUFACTURER
~GQlg~HQlg~ZQEo~ZQET0000~YQ33~NQ34~NQEsW120QER3334353637404142434447CAUSEDESCRIPTION ANDCORRECTIVE ACTIONSQ270Unclearprecritical checkoffprocedure.
Cktbkrsforthesevalvesareclosedforpre-startuplineupandstrokingduringheatup.Laterprecritical checkoffspecifies valvepositionwithcktbkr"open"whilecktbkrpanelmarked"on"and"off."Thereisno3direction toreposition cktbkr.A.C.powerwasremoved.Checkoffwaschangedtodirectrepositioning andtogiveconsistent nomenclature.
On-shifttrainingonpowerremovalreuirementwasheldandfuhtaiib789FACILITYSTATUS%POWEROTHERSTATUS)6C280002eNAMETHODOFDISCOVERY DISCOVERY DESCRIPTION Q32LJQ3)Performing pre-critical rocedure4546LOCATIONOFRELEASE36NACClMQ~QACTIVITYCONTENTRELEASEDOFRELEASEAMOUNTOFACTIVITYQQ33ZQ34NA789101144PERSONNEL EXPOSURES NUMBERTYPEDESCRIPTION Q3e7~000Q37ZQ33NA789111213PERSONNEL INJURIES789II12LOSSOFORDAMAGETOFACILITY43TYPEDESCRIPTION e~zQ42NA8910PUBLICITY ISSUEDDESCRIPTION o~NQ44NA8910804580808090821O5Z80NRCUSEONLY80NAMEOFPREPARERCarlH.Peck686980oPHQNE716/'546-2700, ext.291-205 0
Attachment toLER79-016/01T-0 Rochester GasandElectricCorporation R.E.GinnaNuclearPowerPlant,UnitNo.1DocketNo.50-244Afteramaintenance outagethereactorwastakencriticalAugust4,1979at0425hours.Laterthatdayturbinetriptestingwasperformed inaccordance withthemanufacturer's recommendations, andduringthisareactortripoccurred, at1824hours.Duringperformance oftherestartpre-criticalcheckoffithadbeendiscovered thattheA.C.powerwas"on"forsafetyinjection accumulator injection valvesMOV-841andMOV-865andtherefueling waterstoragetankdeliverytoresidualheatremovalpumpsuctionvalveMOV-856.Thisindicated thatafourteenhourintervalhadelapsedinwhichthereactorhadbeenmadecriticalandwasoperatedwiththeA.C.poweravailable tothesevalvescontrarytoPlantTechnical Speci-fications whichrequireA.C.powertoberemoved.Duringthatinterval, however,thevalveswereintheirpropersafeguards positionandwouldhaveperformed theirintendedfunction.
Investigation revealedthat,asaresultoftheprecritical checkforthefirststartup,thecircuitbreakerpositions forthevalveshadbeenreported, butsincetheprecritical checkoffdidnotdirectchangingthebreakerpositions, theywerenotimmediately repositioned.
Thesepositions werenecessary tooperatethesevalvestoestablish properalignment forsafeguards operation priortoheatupandforvalvestrokingduringtheheatup.Anotheroperatorwaslaterorderedtocheckthebreakerstatusforthesevalves.Heviewedtheircondition asnormalforoperability, reportednothingunusual,anddidnotreposition themforremovalofA.C.power.Further,theprecritical checkoffintroduced confusion tooperators byspecifying thatthebreakersaretobe"open"whilethebreakerpanelsaremarked"on"and"off."Theprecritical checkoffhasbeencorrected todirectrepositioning ofcircuitbreakerswhereremovalofA.C.powerisrequiredbeforereactorcriticality, andtoprovidenomenclature consistent tothebreakerpanels.Inaddition, theOperations Engineerinstructed eachshifttoconducton-'shiftdiscussions ontherequirement forremovalofA.C.powertothesevalves.Furtherformalclassroom trainingdevotedtothisrequirement hasbeeninitiated fortheoperators intheirregularly scheduled trainingperiods.
0}}
0}}

Revision as of 12:32, 29 June 2018

LER 79-016/01T-0 on 790804:14-h Interval of Reactor Operation Lapsed Prior to Trip During Trip Testing Following Maint Outage & Restoration of Criticality.Caused by Unclear Checkoff procedure.On-shift Training Held
ML17261A138
Person / Time
Site: Ginna Constellation icon.png
Issue date: 08/16/1979
From: PECK C H
ROCHESTER GAS & ELECTRIC CORP.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML17244A769 List:
References
LER-79-016-01T, LER-79-16-1T, NUDOCS 7908210524
Download: ML17261A138 (4)
v • d • e


Text

U.S.NUCLEARREGULATORY COMMISSION 79-016/01T-0 LICENSEEEVENTREPORT(CAR1231)Q)(PLEASEPRINTORTYPEALLREQUIREDINFORMATION) 60000000Q341111Q4~QsLICENSENUMBER2526LICENSETYPE3057CAT58NRCFOQM366{7.7I+CONTROLBLOCK:INYREG1Q2009LICENSEECODE1415~078CON'T~0178soURcE~LQB050002447080479QB081679Qe6061DOCKETNUMBEREVENTDATE7475REPORTDATE80EVENTDESCRIPTION ANDPROBABLECONSEQUENCES Q10Following amaintenance outaeandrestoration ofcriticalit a14hr.intervalofreac-~03toroperation lapsedpriortoatripduringtriptesting,inwhichA.C.powerwasonforaccumuinjection MOV'sandRWSTdeliverytoRHRMOV.(T.S.3.3.1.1g).

Thiscon-ditionwasnotedduringprecritical checkoffperformance aftertriptesting.Valves~06~08wereinpropersafeguard positionduringthisintervalofoperation.

Before14hr.intervalcktbkrpositions hadbeenreportedbutcheckoffdidnotdirectrepositioning.

Cktbkrswererechecked ba2ndoeratoronbasisofoerabilitforalinmentsandnothingunusualwasreported.

Controloperatorcompleted procedure assumingpre-criticalrequirement wasfulfilled.

8078~oeSYSTEMCAUSECAUSECOMP.VALVECODECODFSUBCODECOMPONENT CODESUBCODESUBCODERQll~DQ12~ZQ13CKTBRKQE~AQls~ZQs78910111213181920SEQUENTIAL OCCURRENCE REPORTREVISIONLERiROEVENTYEARREPORTNO.CODETYPENO.Q17REPQRT~79~~010~W~01~T~~021222324262728293031ACTIONFUTUREEFFECTSHUTDOWNATTACHMENT NPRDQPRIMECOMP,COMPONENT TAKENACTIONONPLANTMETHODHOURSQ22SUBMITTED FORMSUB.SUPPLIERMANUFACTURER

~GQlg~HQlg~ZQEo~ZQET0000~YQ33~NQ34~NQEsW120QER3334353637404142434447CAUSEDESCRIPTION ANDCORRECTIVE ACTIONSQ270Unclearprecritical checkoffprocedure.

Cktbkrsforthesevalvesareclosedforpre-startuplineupandstrokingduringheatup.Laterprecritical checkoffspecifies valvepositionwithcktbkr"open"whilecktbkrpanelmarked"on"and"off."Thereisno3direction toreposition cktbkr.A.C.powerwasremoved.Checkoffwaschangedtodirectrepositioning andtogiveconsistent nomenclature.

On-shifttrainingonpowerremovalreuirementwasheldandfuhtaiib789FACILITYSTATUS%POWEROTHERSTATUS)6C280002eNAMETHODOFDISCOVERY DISCOVERY DESCRIPTION Q32LJQ3)Performing pre-critical rocedure4546LOCATIONOFRELEASE36NACClMQ~QACTIVITYCONTENTRELEASEDOFRELEASEAMOUNTOFACTIVITYQQ33ZQ34NA789101144PERSONNEL EXPOSURES NUMBERTYPEDESCRIPTION Q3e7~000Q37ZQ33NA789111213PERSONNEL INJURIES789II12LOSSOFORDAMAGETOFACILITY43TYPEDESCRIPTION e~zQ42NA8910PUBLICITY ISSUEDDESCRIPTION o~NQ44NA8910804580808090821O5Z80NRCUSEONLY80NAMEOFPREPARERCarlH.Peck686980oPHQNE716/'546-2700, ext.291-205 0

Attachment toLER79-016/01T-0 Rochester GasandElectricCorporation R.E.GinnaNuclearPowerPlant,UnitNo.1DocketNo.50-244Afteramaintenance outagethereactorwastakencriticalAugust4,1979at0425hours.Laterthatdayturbinetriptestingwasperformed inaccordance withthemanufacturer's recommendations, andduringthisareactortripoccurred, at1824hours.Duringperformance oftherestartpre-criticalcheckoffithadbeendiscovered thattheA.C.powerwas"on"forsafetyinjection accumulator injection valvesMOV-841andMOV-865andtherefueling waterstoragetankdeliverytoresidualheatremovalpumpsuctionvalveMOV-856.Thisindicated thatafourteenhourintervalhadelapsedinwhichthereactorhadbeenmadecriticalandwasoperatedwiththeA.C.poweravailable tothesevalvescontrarytoPlantTechnical Speci-fications whichrequireA.C.powertoberemoved.Duringthatinterval, however,thevalveswereintheirpropersafeguards positionandwouldhaveperformed theirintendedfunction.

Investigation revealedthat,asaresultoftheprecritical checkforthefirststartup,thecircuitbreakerpositions forthevalveshadbeenreported, butsincetheprecritical checkoffdidnotdirectchangingthebreakerpositions, theywerenotimmediately repositioned.

Thesepositions werenecessary tooperatethesevalvestoestablish properalignment forsafeguards operation priortoheatupandforvalvestrokingduringtheheatup.Anotheroperatorwaslaterorderedtocheckthebreakerstatusforthesevalves.Heviewedtheircondition asnormalforoperability, reportednothingunusual,anddidnotreposition themforremovalofA.C.power.Further,theprecritical checkoffintroduced confusion tooperators byspecifying thatthebreakersaretobe"open"whilethebreakerpanelsaremarked"on"and"off."Theprecritical checkoffhasbeencorrected todirectrepositioning ofcircuitbreakerswhereremovalofA.C.powerisrequiredbeforereactorcriticality, andtoprovidenomenclature consistent tothebreakerpanels.Inaddition, theOperations Engineerinstructed eachshifttoconducton-'shiftdiscussions ontherequirement forremovalofA.C.powertothesevalves.Furtherformalclassroom trainingdevotedtothisrequirement hasbeeninitiated fortheoperators intheirregularly scheduled trainingperiods.

0

Retrieved from "https://kanterella.com/w/index.php?title=ML17261A138&oldid=743791"