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{{#Wiki_filter://g(c~ROBERTC.MECREDYVicePresidentNvcfeorOperotionsROCHESTERGASANDELECTRICCORPORATION~89EASTAVENUEROCHESTERN.Y.Id6d9.0MIAREACODE71654'6-2700January15,1998U.S.NuclearRegulatoryCommissionDocumentControlDeskAttn:GuyS.VissingProjectDirectorateI-1Washington,D.C.20555
{{#Wiki_filter://g(c~ROBERTC.MECREDYVicePresident NvcfeorOperotions ROCHESTER GASANDELECTRICCORPORATION
~89EASTAVENUE ROCHESTER N.Y.Id6d9.0MI AREACODE71654'6-2700 January15,1998U.S.NuclearRegulatory Commission DocumentControlDeskAttn:GuyS.VissingProjectDirectorate I-1Washington, D.C.20555


==Subject:==
==Subject:==
Line 23: Line 24:


==DearMr.Vissing:==
==DearMr.Vissing:==
Inaccordancewith10CFRPart21,ReportingofDefectsandNoncompliance,Section21(d)(3)(ii),whichrequires"WrittennotificationtotheNRC...ontheidentificatiohiofadefectorafailuretocomply",theattached10CFR21reportisherebysubmitted.Verytrulyyours,RobertC.Mecredxc:Mr.GuyS.Vissing(MailStop14B2)ProjectDirectorateI-1DivisionofReactorProjects-I/IIOfficeofNuclearReactorRegulationU.S.NuclearRegulatoryCommissionWashington,D.C.20555RegionalAdministrator,RegionIU.S.NuclearRegulatoryCommission475AllendaleRoadKingofPrussia,PA194066IU.S.NRCGinnaSeniorResidentInspector'tt80i2203b5'sI80ii5PDRADQCK05000244SPDRIIIIIII/IIIIIIIIIlIIIIIIIIIIIIIIIIIIIII h~.
Inaccordance with10CFRPart21,Reporting ofDefectsandNoncompliance, Section21(d)(3)(ii),whichrequires"Writtennotification totheNRC...ontheidentificatiohi ofadefectorafailuretocomply",theattached10CFR21reportisherebysubmitted.
10CFR2130DAYWRITTENREPORTPage2I.'AMEANDADDRESSOFTHEINDIVIDUALINFORMINGTHECOMMISSION:NAME:RobertC.Mecredy'icePresidentNuclearOperationsGroupADDRESS:RochesterGas&ElectricCorporation89.EastAvenueRochester,NewYork14649'IDENTIFICATIONOFTHEFACILITY,THEACTIVITY,ORTHEBASICCOMPONENTSUPPLIEDFORSUCHFACILITYWHICHFAILSTOCOMPLYORCONTAINSADEFECT:IThefacilityistheR.E.GinnaNuclearPowerPlant.Thebasiccomponentistheshunttripassemblyonthe"B"EmergencyDieselGenerator(EDG)SupplyBreakertoBus16.ThisbreakerisaWestinghouseDB-75aircircuitbreakerandtheGinnaequipmentidentificationnumberisEIN52/EG1B1,TheshunttripassemblywasinstalledonthisbreakerinMay,1995,usingsparepartspurchasedin1977.IDENTIFICATIONOFTHEFIRMCONSTRUCTINGTHEFACILITYORSUPPLYINGTHEBASICCOMPONENTWHICHFAILSTOCOMPLYORCONTAINSADEFECT:Theshunttripassemblywassuppliedby:WestinghouseElectricCorporationPowerSystemsSwitchgearDivision700BraddockAvenueEastPittsburgh,PA15112NATUREOFTHEDEFECTORFAILURETOCOMPLYANDTHESAFETYHAZARDWHICHISCREATEDORCOULDBECREATEDBYSUCHDEFECTORFAILURETOCOMPLY:Theshunttripcoilplungerispartoftheshunttripandalarmswitchassembly.Theplungeroftheshunttripassemblywasbindingintheshunttripcoil.Whenactivated,thebreaker'sshunttripcoilplungerpullsthebreakertripperbartotripthebreaker.Theboundplungerwasnotreturningtoitsdeenergizedposition.Thebreakertripperbarwasbeingmaintainedinthetripfreeposition,preventingtheDB-75aircircuitbreakerfromclosing.
Verytrulyyours,RobertC.Mecredxc:Mr.GuyS.Vissing(MailStop14B2)ProjectDirectorate I-1DivisionofReactorProjects-I/IIOfficeofNuclearReactorRegulation U.S.NuclearRegulatory Commission Washington, D.C.20555RegionalAdministrator, RegionIU.S.NuclearRegulatory Commission 475Allendale RoadKingofPrussia,PA194066IU.S.NRCGinnaSeniorResidentInspector
'tt80i2203b5
'sI80ii5PDRADQCK05000244SPDRIIIIIII/IIIIIIIIIlIIIIIIIIIIIIIIIIIIIII h~.
10CFR2130DAYWRITTENREPORTPage2I.'AMEANDADDRESSOFTHEINDIVIDUAL INFORMING THECOMMISSION:
NAME:RobertC.Mecredy'icePresident NuclearOperations GroupADDRESS:Rochester Gas&ElectricCorporation 89.EastAvenueRochester, NewYork14649'IDENTIFICATION OFTHEFACILITY, THEACTIVITY, ORTHEBASICCOMPONENT SUPPLIEDFORSUCHFACILITYWHICHFAILSTOCOMPLYORCONTAINSADEFECT:IThefacilityistheR.E.GinnaNuclearPowerPlant.Thebasiccomponent istheshunttripassemblyonthe"B"Emergency DieselGenerator (EDG)SupplyBreakertoBus16.ThisbreakerisaWestinghouse DB-75aircircuitbreakerandtheGinnaequipment identification numberisEIN52/EG1B1, Theshunttripassemblywasinstalled onthisbreakerinMay,1995,usingsparepartspurchased in1977.IDENTIFICATION OFTHEFIRMCONSTRUCTING THEFACILITYORSUPPLYING THEBASICCOMPONENT WHICHFAILSTOCOMPLYORCONTAINSADEFECT:Theshunttripassemblywassuppliedby:Westinghouse ElectricCorporation PowerSystemsSwitchgear Division700BraddockAvenueEastPittsburgh, PA15112NATUREOFTHEDEFECTORFAILURETOCOMPLYANDTHESAFETYHAZARDWHICHISCREATEDORCOULDBECREATEDBYSUCHDEFECTORFAILURETOCOMPLY:Theshunttripcoilplungerispartoftheshunttripandalarmswitchassembly.
Theplungeroftheshunttripassemblywasbindingintheshunttripcoil.Whenactivated, thebreaker's shunttripcoilplungerpullsthebreakertripperbartotripthebreaker.Theboundplungerwasnotreturning toitsdeenergized position.
Thebreakertripperbarwasbeingmaintained inthetripfreeposition, preventing theDB-75aircircuitbreakerfromclosing.
r't,I/
r't,I/
Page3Testingofthe"B"EDGSupplyBreakertoBus16wasperformedinNovember,1997,duringthe1997outage.'Duringthistesting,thebreakerfailedtoclose.Thebreakercouldnotbeclosedelectricallyormanually,becausetheshunttripcoilplungerwasmaintainingthetripperbarinthetripfreeposition.Thisfailurewouldpreventthe"B"EDGfromsupplyingpowertothesafeguardsloadsonBus16.Thisisconsideredamajordegradationsince,inconjunctionwithasinglefailureontheredundanttrain,requiredsafetyfunctionscouldnotbeperformed.THEDATEONWHICHTHEINFORMATIONOFSUCHDEFECTORFAILURETOCOMPLYWASOBTAINED:TheinformationwasobtainedduringtestingperformedonNovember14,1997.INTHECASEOFABASICCOMPONENTWHICHCONTAINSADEFECTORFAILSTOCOMPLY,THENUMBERANDLOCATIONOFALLSUCHCOMPONENTSINUSEAT,SUPPLIEDFOR,ORBEINGSUPPLIEDFORGINNASTATION:TherearesixWestinghouseDB-75breakerspermanentlyinstalledatGinnaStation,insafeguardsbuses14,and16.Oneofthesebreakersismanuallyoperatedandtheshunttripcoilisnotused.Inaddition,thereisonespareDB-75breakerinstock.Withtheexceptionofthe52/EG1B1breaker,thesebreakersstillhavetheiroriginalshunttripassembliesinstalled.The52/EG181breakeristheonlyDB-75breakerthathashadtheshunttripassemblyreplaced.Thereplacementshunttripassemblythatfailedwasoneoftenpurchasedin1977asspares.THECORRECTIVEACTIONWHICHHASBEEN,ISBEING,ORWILLBETAKEN;THENAMEOFTHEINDIVIDUALORORGANIZATIONRESPONSIBLEFORTHEACTION;ANDTHELENGTHOFTIMETHATHASBEENORWILLBETAKENTOCOMPLETETHEACTION:Correctiveactioniscomplete.Thefailedshunttripassemblywasreplacedwithasparefromstock.Theassemblywasmanuallyandelectricallybench'testedpriortobeingreturnedtooperablestatus.Theremainingeightassembliesinstockwereinspected.Twoassemblieshadcoilplungersthatdidnotfullyreturntothedeenergizedpositionduringmanualmanipulation.Thesewereremovedfromstock.1TheotherDB-75breakerswerevisuallyinspected.Acceptableplungermovementisindicatedbyadequateplungertotripperbargapandfullretractionofthealarmswitchattachmentpushrod.Noadditionalbindingconcernswerefound.
Page3Testingofthe"B"EDGSupplyBreakertoBus16wasperformed inNovember, 1997,duringthe1997outage.'Duringthistesting,thebreakerfailedtoclose.Thebreakercouldnotbeclosedelectrically ormanually, becausetheshunttripcoilplungerwasmaintaining thetripperbarinthetripfreeposition.
Page4TheProcurementAnalysisForm(PAF)fortheshunttripassemblywasappended.Priortoreordering,thePAFnowrequirestheadditionofplungermovementverificationtotheassemblyacceptanceplan.Westinghousewascontacted.Therehavebeennootherreportedeventsofthisnature'thatWestinghouseisawareof.Acheckofindustryoperationaleventsdidnotidentifysimilarbreakerfailure.ANYADVICERELATEDTOTHEDEFECTORFAILURETOCOMPLYABOUTTHEFACILITY,ACTIVITY,ORBASICCOMPONENTTHATHASBEEN,ISBEING,ORWILLBEGIVENTOPURCHASERSORLICENSEES:Receiptinspectioncouldverifyacceptableplungermovement.DuringDB-75breakermaintenance,considerverifyingthattheshunttripcoilplungermovesfreely.inthecoilbyverifyingadequateplungertotripperbargapandfullretractionofthealarmswitchattachmentpushrod.  
Thisfailurewouldpreventthe"B"EDGfromsupplying powertothesafeguards loadsonBus16.Thisisconsidered amajordegradation since,inconjunction withasinglefailureontheredundant train,requiredsafetyfunctions couldnotbeperformed.
~f)JGENERALINFORMATIONorOTHEREVENTNUMBER:33442LICENSEE:ROCHESTERGASRELECTRICCORPCITY:ROCHESTERREGION:1COUNTY:STATE:NYLICENSES:AGREEMENT:YDOCKET:NOTIFICATXONDATE:12/22/97NOTIFICATIONTIME:09:10[ET]EVENTDATE:11/14/97EVENTTIME:12:00[EST]LASTUPDATEDATE:12/22/97NOTIFICATIONSNRCNOTIFIEDBY:JOHNST.MARTENHQOPSOFFICER:DOUGWEAVEREMERGENCYCLASS:NOTAPPLICABLE10CFRSECTION:CCCC21.21UNSPECIFIEDPARAGRAPHJAMESNOGGLEJERRYCARTERRDONRREVENTTEXTPART21-DEFECTIVESHUNTTRIPCOXLSTHELICENSEED1SCOVEREDAWESTINGHOUSEDB-75BREAKERTHATWASFAILINGTOCLOSEATTHEIRGINNAPLANT.THEPLUNGEROFTHESHUNTTRIPCOILASSEMBLYWASBXNDING,MAINTAININGTHEBREAKERTRIPPERBARINTHETRIPFREEPOSITION.THELICENSEEHASSEVENDB-75BREAKERSONSITE,ONLYONEHADTHEPROBLEMDESCRIBED.THEBREAKERWITHTHEFAILEDSHUNTTRIPCOILISTHEONLYONETOHAVEHADTHATPARTPREVIOUSLYREPLACED.THEREPLACEMENTSHUNTTR1PCOILTHATFAILEDWASONEOFTENPURCHASEDIN1977ASSPARES.THEFAILEDSHUNTTRIPCOILWASREPLACEDWITHASPAREFROMSTOCK.THEREMAININGEIGHTASSEMBLIESINSTOCKWEREINSPECTED.TWOASSEMBLXESHADCOILPLUNGERSTHATDIDNOTFULLYRETURNTOTHEDEENERGIZEDPOSITIONDURINGMANUALMANIPULATION.THESEWEREREMOVEDFROMSTOCK.LICENSEERECOMMENDSRECEIPTINSPECTIONTOVERIFYACCEPTABLEPLUNGERMOVEMENTANDALSOVERIFYINGTHATTHESHUNTTRIPCOILPLUNGERMOVESFREELYINTHECOILASSEMBLYDURINGBREAKERMAINTENANCE.~(qk  
THEDATEONWHICHTHEINFORMATION OFSUCHDEFECTORFAILURETOCOMPLYWASOBTAINED:
Theinformation wasobtainedduringtestingperformed onNovember14,1997.INTHECASEOFABASICCOMPONENT WHICHCONTAINSADEFECTORFAILSTOCOMPLY,THENUMBERANDLOCATIONOFALLSUCHCOMPONENTS INUSEAT,SUPPLIEDFOR,ORBEINGSUPPLIEDFORGINNASTATION:TherearesixWestinghouse DB-75breakerspermanently installed atGinnaStation,insafeguards buses14,and16.Oneofthesebreakersismanuallyoperatedandtheshunttripcoilisnotused.Inaddition, thereisonespareDB-75breakerinstock.Withtheexception ofthe52/EG1B1breaker,thesebreakersstillhavetheiroriginalshunttripassemblies installed.
The52/EG181breakeristheonlyDB-75breakerthathashadtheshunttripassemblyreplaced.
Thereplacement shunttripassemblythatfailedwasoneoftenpurchased in1977asspares.THECORRECTIVE ACTIONWHICHHASBEEN,ISBEING,ORWILLBETAKEN;THENAMEOFTHEINDIVIDUAL ORORGANIZATION RESPONSIBLE FORTHEACTION;ANDTHELENGTHOFTIMETHATHASBEENORWILLBETAKENTOCOMPLETETHEACTION:Corrective actioniscomplete.
Thefailedshunttripassemblywasreplacedwithasparefromstock.Theassemblywasmanuallyandelectrically bench'tested priortobeingreturnedtooperablestatus.Theremaining eightassemblies instockwereinspected.
Twoassemblies hadcoilplungersthatdidnotfullyreturntothedeenergized positionduringmanualmanipulation.
Thesewereremovedfromstock.1TheotherDB-75breakerswerevisuallyinspected.
Acceptable plungermovementisindicated byadequateplungertotripperbargapandfullretraction ofthealarmswitchattachment pushrod.Noadditional bindingconcernswerefound.
Page4TheProcurement AnalysisForm(PAF)fortheshunttripassemblywasappended.
Priortoreordering, thePAFnowrequirestheadditionofplungermovementverification totheassemblyacceptance plan.Westinghouse wascontacted.
Therehavebeennootherreportedeventsofthisnature'that Westinghouse isawareof.Acheckofindustryoperational eventsdidnotidentifysimilarbreakerfailure.ANYADVICERELATEDTOTHEDEFECTORFAILURETOCOMPLYABOUTTHEFACILITY,
: ACTIVITY, ORBASICCOMPONENT THATHASBEEN,ISBEING,ORWILLBEGIVENTOPURCHASERS ORLICENSEES:
Receiptinspection couldverifyacceptable plungermovement.
DuringDB-75breakermaintenance, considerverifying thattheshunttripcoilplungermovesfreely.inthecoilbyverifying adequateplungertotripperbargapandfullretraction ofthealarmswitchattachment pushrod.  
~f)JGENERALINFORMATION orOTHEREVENTNUMBER:33442LICENSEE:
ROCHESTER GASRELECTRICCORPCITY:ROCHESTER REGION:1COUNTY:STATE:NYLICENSES:
AGREEMENT:
YDOCKET:NOTIFICATXON DATE:12/22/97NOTIFICATION TIME:09:10[ET]EVENTDATE:11/14/97EVENTTIME:12:00[EST]
LASTUPDATEDATE:12/22/97NOTIFICATIONS NRCNOTIFIEDBY:JOHNST.MARTENHQOPSOFFICER:DOUGWEAVEREMERGENCY CLASS:NOTAPPLICABLE 10CFRSECTION:CCCC21.21UNSPECIFIED PARAGRAPH JAMESNOGGLEJERRYCARTERRDONRREVENTTEXTPART21-DEFECTIVE SHUNTTRIPCOXLSTHELICENSEED1SCOVERED AWESTINGHOUSE DB-75BREAKERTHATWASFAILINGTOCLOSEATTHEIRGINNAPLANT.THEPLUNGEROFTHESHUNTTRIPCOILASSEMBLYWASBXNDING,MAINTAINING THEBREAKERTRIPPERBARINTHETRIPFREEPOSITION.
THELICENSEEHASSEVENDB-75BREAKERSONSITE,ONLYONEHADTHEPROBLEMDESCRIBED.
THEBREAKERWITHTHEFAILEDSHUNTTRIPCOILISTHEONLYONETOHAVEHADTHATPARTPREVIOUSLY REPLACED.
THEREPLACEMENT SHUNTTR1PCOILTHATFAILEDWASONEOFTENPURCHASED IN1977ASSPARES.THEFAILEDSHUNTTRIPCOILWASREPLACEDWITHASPAREFROMSTOCK.THEREMAINING EIGHTASSEMBLIES INSTOCKWEREINSPECTED.
TWOASSEMBLXES HADCOILPLUNGERSTHATDIDNOTFULLYRETURNTOTHEDEENERGIZED POSITIONDURINGMANUALMANIPULATION.
THESEWEREREMOVEDFROMSTOCK.LICENSEERECOMMENDS RECEIPTINSPECTION TOVERIFYACCEPTABLE PLUNGERMOVEMENTANDALSOVERIFYING THATTHESHUNTTRIPCOILPLUNGERMOVESFREELYINTHECOILASSEMBLYDURINGBREAKERMAINTENANCE.
~(qk  
:~t}}
:~t}}

Revision as of 10:02, 29 June 2018

Deficiency Rept Re Failure of Shunt Trip Coil Plunger to Return to Deenergized Position Resulting in Breaker Tripper Bar Being Maintained in Trip Free Position,Preventing DB-75 Air Circuit Breaker from Closing.Failed Assembly Replaced
ML17309A624
Person / Time
Site: Ginna Constellation icon.png
Issue date: 01/15/1998
From: MECREDY R C
ROCHESTER GAS & ELECTRIC CORP.
To: VISSING G S
NRC (Affiliation Not Assigned), NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-PT21-98 NUDOCS 9801220365
Download: ML17309A624 (8)
v • d • e


Text

//g(c~ROBERTC.MECREDYVicePresident NvcfeorOperotions ROCHESTER GASANDELECTRICCORPORATION

~89EASTAVENUE ROCHESTER N.Y.Id6d9.0MI AREACODE71654'6-2700 January15,1998U.S.NuclearRegulatory Commission DocumentControlDeskAttn:GuyS.VissingProjectDirectorate I-1Washington, D.C.20555

Subject:

10CFRPart2130DayReportR.E.GinnaNuclearPowerPlantDocketNo.50-244

DearMr.Vissing:

Inaccordance with10CFRPart21,Reporting ofDefectsandNoncompliance, Section21(d)(3)(ii),whichrequires"Writtennotification totheNRC...ontheidentificatiohi ofadefectorafailuretocomply",theattached10CFR21reportisherebysubmitted.

Verytrulyyours,RobertC.Mecredxc:Mr.GuyS.Vissing(MailStop14B2)ProjectDirectorate I-1DivisionofReactorProjects-I/IIOfficeofNuclearReactorRegulation U.S.NuclearRegulatory Commission Washington, D.C.20555RegionalAdministrator, RegionIU.S.NuclearRegulatory Commission 475Allendale RoadKingofPrussia,PA194066IU.S.NRCGinnaSeniorResidentInspector

'tt80i2203b5

'sI80ii5PDRADQCK05000244SPDRIIIIIII/IIIIIIIIIlIIIIIIIIIIIIIIIIIIIII h~.

10CFR2130DAYWRITTENREPORTPage2I.'AMEANDADDRESSOFTHEINDIVIDUAL INFORMING THECOMMISSION:

NAME:RobertC.Mecredy'icePresident NuclearOperations GroupADDRESS:Rochester Gas&ElectricCorporation 89.EastAvenueRochester, NewYork14649'IDENTIFICATION OFTHEFACILITY, THEACTIVITY, ORTHEBASICCOMPONENT SUPPLIEDFORSUCHFACILITYWHICHFAILSTOCOMPLYORCONTAINSADEFECT:IThefacilityistheR.E.GinnaNuclearPowerPlant.Thebasiccomponent istheshunttripassemblyonthe"B"Emergency DieselGenerator (EDG)SupplyBreakertoBus16.ThisbreakerisaWestinghouse DB-75aircircuitbreakerandtheGinnaequipment identification numberisEIN52/EG1B1, Theshunttripassemblywasinstalled onthisbreakerinMay,1995,usingsparepartspurchased in1977.IDENTIFICATION OFTHEFIRMCONSTRUCTING THEFACILITYORSUPPLYING THEBASICCOMPONENT WHICHFAILSTOCOMPLYORCONTAINSADEFECT:Theshunttripassemblywassuppliedby:Westinghouse ElectricCorporation PowerSystemsSwitchgear Division700BraddockAvenueEastPittsburgh, PA15112NATUREOFTHEDEFECTORFAILURETOCOMPLYANDTHESAFETYHAZARDWHICHISCREATEDORCOULDBECREATEDBYSUCHDEFECTORFAILURETOCOMPLY:Theshunttripcoilplungerispartoftheshunttripandalarmswitchassembly.

Theplungeroftheshunttripassemblywasbindingintheshunttripcoil.Whenactivated, thebreaker's shunttripcoilplungerpullsthebreakertripperbartotripthebreaker.Theboundplungerwasnotreturning toitsdeenergized position.

Thebreakertripperbarwasbeingmaintained inthetripfreeposition, preventing theDB-75aircircuitbreakerfromclosing.

r't,I/

Page3Testingofthe"B"EDGSupplyBreakertoBus16wasperformed inNovember, 1997,duringthe1997outage.'Duringthistesting,thebreakerfailedtoclose.Thebreakercouldnotbeclosedelectrically ormanually, becausetheshunttripcoilplungerwasmaintaining thetripperbarinthetripfreeposition.

Thisfailurewouldpreventthe"B"EDGfromsupplying powertothesafeguards loadsonBus16.Thisisconsidered amajordegradation since,inconjunction withasinglefailureontheredundant train,requiredsafetyfunctions couldnotbeperformed.

THEDATEONWHICHTHEINFORMATION OFSUCHDEFECTORFAILURETOCOMPLYWASOBTAINED:

Theinformation wasobtainedduringtestingperformed onNovember14,1997.INTHECASEOFABASICCOMPONENT WHICHCONTAINSADEFECTORFAILSTOCOMPLY,THENUMBERANDLOCATIONOFALLSUCHCOMPONENTS INUSEAT,SUPPLIEDFOR,ORBEINGSUPPLIEDFORGINNASTATION:TherearesixWestinghouse DB-75breakerspermanently installed atGinnaStation,insafeguards buses14,and16.Oneofthesebreakersismanuallyoperatedandtheshunttripcoilisnotused.Inaddition, thereisonespareDB-75breakerinstock.Withtheexception ofthe52/EG1B1breaker,thesebreakersstillhavetheiroriginalshunttripassemblies installed.

The52/EG181breakeristheonlyDB-75breakerthathashadtheshunttripassemblyreplaced.

Thereplacement shunttripassemblythatfailedwasoneoftenpurchased in1977asspares.THECORRECTIVE ACTIONWHICHHASBEEN,ISBEING,ORWILLBETAKEN;THENAMEOFTHEINDIVIDUAL ORORGANIZATION RESPONSIBLE FORTHEACTION;ANDTHELENGTHOFTIMETHATHASBEENORWILLBETAKENTOCOMPLETETHEACTION:Corrective actioniscomplete.

Thefailedshunttripassemblywasreplacedwithasparefromstock.Theassemblywasmanuallyandelectrically bench'tested priortobeingreturnedtooperablestatus.Theremaining eightassemblies instockwereinspected.

Twoassemblies hadcoilplungersthatdidnotfullyreturntothedeenergized positionduringmanualmanipulation.

Thesewereremovedfromstock.1TheotherDB-75breakerswerevisuallyinspected.

Acceptable plungermovementisindicated byadequateplungertotripperbargapandfullretraction ofthealarmswitchattachment pushrod.Noadditional bindingconcernswerefound.

Page4TheProcurement AnalysisForm(PAF)fortheshunttripassemblywasappended.

Priortoreordering, thePAFnowrequirestheadditionofplungermovementverification totheassemblyacceptance plan.Westinghouse wascontacted.

Therehavebeennootherreportedeventsofthisnature'that Westinghouse isawareof.Acheckofindustryoperational eventsdidnotidentifysimilarbreakerfailure.ANYADVICERELATEDTOTHEDEFECTORFAILURETOCOMPLYABOUTTHEFACILITY,

ACTIVITY, ORBASICCOMPONENT THATHASBEEN,ISBEING,ORWILLBEGIVENTOPURCHASERS ORLICENSEES:

Receiptinspection couldverifyacceptable plungermovement.

DuringDB-75breakermaintenance, considerverifying thattheshunttripcoilplungermovesfreely.inthecoilbyverifying adequateplungertotripperbargapandfullretraction ofthealarmswitchattachment pushrod.

~f)JGENERALINFORMATION orOTHEREVENTNUMBER:33442LICENSEE:

ROCHESTER GASRELECTRICCORPCITY:ROCHESTER REGION:1COUNTY:STATE:NYLICENSES:

AGREEMENT:

YDOCKET:NOTIFICATXON DATE:12/22/97NOTIFICATION TIME:09:10[ET]EVENTDATE:11/14/97EVENTTIME:12:00[EST]

LASTUPDATEDATE:12/22/97NOTIFICATIONS NRCNOTIFIEDBY:JOHNST.MARTENHQOPSOFFICER:DOUGWEAVEREMERGENCY CLASS:NOTAPPLICABLE 10CFRSECTION:CCCC21.21UNSPECIFIED PARAGRAPH JAMESNOGGLEJERRYCARTERRDONRREVENTTEXTPART21-DEFECTIVE SHUNTTRIPCOXLSTHELICENSEED1SCOVERED AWESTINGHOUSE DB-75BREAKERTHATWASFAILINGTOCLOSEATTHEIRGINNAPLANT.THEPLUNGEROFTHESHUNTTRIPCOILASSEMBLYWASBXNDING,MAINTAINING THEBREAKERTRIPPERBARINTHETRIPFREEPOSITION.

THELICENSEEHASSEVENDB-75BREAKERSONSITE,ONLYONEHADTHEPROBLEMDESCRIBED.

THEBREAKERWITHTHEFAILEDSHUNTTRIPCOILISTHEONLYONETOHAVEHADTHATPARTPREVIOUSLY REPLACED.

THEREPLACEMENT SHUNTTR1PCOILTHATFAILEDWASONEOFTENPURCHASED IN1977ASSPARES.THEFAILEDSHUNTTRIPCOILWASREPLACEDWITHASPAREFROMSTOCK.THEREMAINING EIGHTASSEMBLIES INSTOCKWEREINSPECTED.

TWOASSEMBLXES HADCOILPLUNGERSTHATDIDNOTFULLYRETURNTOTHEDEENERGIZED POSITIONDURINGMANUALMANIPULATION.

THESEWEREREMOVEDFROMSTOCK.LICENSEERECOMMENDS RECEIPTINSPECTION TOVERIFYACCEPTABLE PLUNGERMOVEMENTANDALSOVERIFYING THATTHESHUNTTRIPCOILPLUNGERMOVESFREELYINTHECOILASSEMBLYDURINGBREAKERMAINTENANCE.

~(qk

~t
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