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{{#Wiki_filter:REGULATORY,%FORMATIONDISTRIBUTIONSYEM(RIOS)ACCESSIONNBR:8010200056OOCi'DATEt80/10/20NOTARIZED:NODOCKETFACIL!50387SusquehannaStea~ElectricStationgUnitirPennsy'Iva50388SusquehannaSteamElectricStationiUnit2rPennsylv050003AUTH,NAMEAUTHORAFFILIATIONCURTIS'~H~PennsylvaniaPoser8LightCo,RECIP~NAMERKCIPIKNTAFFILIATION,IliGRIERgB,H,RegioniiPhiladelphiarOfficeoftheDirector
 
==SUBJECT:==
Interimdeficiencyreptreexcessivevo,ltagedropsinacmotor.operatedvalvecontrolscircuitsKR1004508ER100508;Causedbysizeableresistanceofsmallcontrolcablelonglengths.Alternativesbeingevaluated>DISTRIBUTIONCODE:B019SCOPIESRKCEIVKDeLTRENCLSIZE:I,6TITLE:ConstructionDeficiencyReport-(10CFR50.55E)NOTES:SendI8K3copiesFSAR8allamends.SendILE;3copiesFSARLallamends.0500038705000388RECIPIENTIOCODE/NA>41KACTION+A/DLICENSNG04RUSHBROOKgM,'6INTERNAL~AD/RCI/IE17ASLBP/J~HARDEDOLSTAFF19HYD/GEOBR22LICQUAL-BR12NRCPOR'2REV13REGFI01DRDSDEV21COPIES.L'iTTR*ENCL11111111RECIPIENT'OCODKiNAMEYOUNGBLOOOzB05STARKER,'7AEOD,18D/DIRHUMFAC15EQUIPQUAL,BRi1ILE09MPA20OELD21QABR10RUTHKRFOROeH~IECOPIESLTTRENCL'1XTKRNAL:ACRSNSIC1608161LPDR03OCT2V1980TOTALNUMBEROFCOPIESREQUIRED;LTTR39ENCL
/~ikj3'lggIIPl'>lQ)Ar+A TWONORTHNINTHSTREET,.PP8,L..~.IALLENTOWN,'PA:18101PHONEs(215)821~5151NORMANW.CURTISVicePresident-EngineeringILConairuction-Nuclear821-5381October20,1980Mr.BoyceH.GrierDirector,RegionIU.S.NuclearRegulatoryCommission631ParkAvenueKingofPrussia,Pennsylvania19406SUSQUEHANNASTEAMELECTRICSTATIONINTERIMREPORTOFADEFICIENCYONEXCESSIVEVOLTAGEDROPSINACMOTOROPERATEDVALVECONTROLCIRCUITSERs100450/100508FILE840-4PLA-560
 
==DearMr.Grier:==
ThisletterservestoconfirminformationprovidedbytelephonetoNRCRegionIInspectorMr.J.DurrbyMr.R.A.SchwanofPPGLonSeptember18,1980.DuringthatconversationMr.Durr.:wasadvisedthatthesubjectcon-ditionwasunderevaluationforreportabilityundertheprovisionsof10CFR50.55(e).Thedeficiencyinvolvesexcessivevoltagedropsinthecontrolcircuitryofthemotorstartersforsomemotoroperatedvalves(MOVs).(Motorstartersaredeviceswhichprovidethecontrolofpowertomotors.)ForACpoweredMOVsrthemotorstarteroperatingcoilsaresuppliedviaacontroltransformertappedofftheMOVpowersupply.MultipleswitchesandrelaycontactsarewiredinthiscontrolcircuittomakeupthecontrollogicfortheMOV.AtSusquehannaSES,excessivevoltagedropsoccurinmotorstartercontrolcableswhensize2,orlarger,startersformotoroperatedvalvesareenergized.Thesevoltagedrops,whicharesevereenoughtopreventmotorstarteroperation,arecausedbythesizeableresistance(severalohms)oflonglengths(severalthousandEeet)ofsmall(114cu)controlcable.Twenty-two(22)size2orlargermotorstartersarelocatedinClasslEsafetysystemssuchasReactorRecirculationandResidualHeatRemovalandmustbecheckedtodetermineifexcessivevoltaged'ropsoccur.Sincethesevalvesarerequiredtooperatetomitigateadesignbasisevent,theaforementionedfailuretooperaterepresentsasignificantdeficiencyindesign.Therefore,thedeficiencyisdeemedreportableunder10CFR50.55(e).Further,sincethedetailsofthisreportprovide."informationrelevanttothereportingrequirementsof10CFR21,thiscorrespondenceisconsideredtoalsodischargeanyformalresponsibilityPPGLmayhaveforreportingincompliancethereto.Ao('galSI0$0g40PENNSYLVANIAPOWEREsLIGHTCOMPANY
\:Mr.Boy'ce'.5.GrierOctober20,1980PPGLEngineeringisintheprocessofevaluatingseveralalternativesinordertodetermineanoptimumcourseofaction.Wecurrentlyestimatethatafinalreportof'hedeficiencyandthecorrectiveactiontakenwillbetransmittedtoyouinJanuary,1981.Verytrulyyours,N.W.CurtisVicePresident-EngineeringaConstruction-NuclearFLW:mcbcc:Mr.VictorStello(15)Director-OfficeofInspection6EnforcementU.S.NuclearRegulatoryCommissionWashington,D.C.20555<Mr.G;--McDonald,-Director.OfficeofManagementInformation6Program-ControlU.S.NuclearRegulatoryCommissionWashington,D.C.20555Mr.RobertM.GalloU.S.NuclearRegulatoryCommissionP.O.Box52Shickshinny,Pennsylvania18655
}}

Revision as of 10:53, 20 April 2018

Interim Deficiency Rept Re Excessive Voltage Drops in Ac Motor Operated Valve Controls Circuits Er 100450 & Er 100508.Caused by Sizeable Resistance of Small Control Cable Long Lengths.Alternatives Being Evaluated
ML18030A154
Person / Time
Site: Susquehanna  
Issue date: 10/20/1980
From: CURTIS N W
PENNSYLVANIA POWER & LIGHT CO.
To: GRIER B H
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
10CFR-050.55E, 10CFR-50.55E, PLA-560, NUDOCS 8010240456
Download: ML18030A154 (4)
v • d • e


Text

REGULATORY,%FORMATIONDISTRIBUTIONSYEM(RIOS)ACCESSIONNBR:8010200056OOCi'DATEt80/10/20NOTARIZED:NODOCKETFACIL!50387SusquehannaStea~ElectricStationgUnitirPennsy'Iva50388SusquehannaSteamElectricStationiUnit2rPennsylv050003AUTH,NAMEAUTHORAFFILIATIONCURTIS'~H~PennsylvaniaPoser8LightCo,RECIP~NAMERKCIPIKNTAFFILIATION,IliGRIERgB,H,RegioniiPhiladelphiarOfficeoftheDirector

SUBJECT:

Interimdeficiencyreptreexcessivevo,ltagedropsinacmotor.operatedvalvecontrolscircuitsKR1004508ER100508;Causedbysizeableresistanceofsmallcontrolcablelonglengths.Alternativesbeingevaluated>DISTRIBUTIONCODE:B019SCOPIESRKCEIVKDeLTRENCLSIZE:I,6TITLE:ConstructionDeficiencyReport-(10CFR50.55E)NOTES:SendI8K3copiesFSAR8allamends.SendILE;3copiesFSARLallamends.0500038705000388RECIPIENTIOCODE/NA>41KACTION+A/DLICENSNG04RUSHBROOKgM,'6INTERNAL~AD/RCI/IE17ASLBP/J~HARDEDOLSTAFF19HYD/GEOBR22LICQUAL-BR12NRCPOR'2REV13REGFI01DRDSDEV21COPIES.L'iTTR*ENCL11111111RECIPIENT'OCODKiNAMEYOUNGBLOOOzB05STARKER,'7AEOD,18D/DIRHUMFAC15EQUIPQUAL,BRi1ILE09MPA20OELD21QABR10RUTHKRFOROeH~IECOPIESLTTRENCL'1XTKRNAL:ACRSNSIC1608161LPDR03OCT2V1980TOTALNUMBEROFCOPIESREQUIRED;LTTR39ENCL

/~ikj3'lggIIPl'>lQ)Ar+A TWONORTHNINTHSTREET,.PP8,L..~.IALLENTOWN,'PA:18101PHONEs(215)821~5151NORMANW.CURTISVicePresident-EngineeringILConairuction-Nuclear821-5381October20,1980Mr.BoyceH.GrierDirector,RegionIU.S.NuclearRegulatoryCommission631ParkAvenueKingofPrussia,Pennsylvania19406SUSQUEHANNASTEAMELECTRICSTATIONINTERIMREPORTOFADEFICIENCYONEXCESSIVEVOLTAGEDROPSINACMOTOROPERATEDVALVECONTROLCIRCUITSERs100450/100508FILE840-4PLA-560

DearMr.Grier:

ThisletterservestoconfirminformationprovidedbytelephonetoNRCRegionIInspectorMr.J.DurrbyMr.R.A.SchwanofPPGLonSeptember18,1980.DuringthatconversationMr.Durr.:wasadvisedthatthesubjectcon-ditionwasunderevaluationforreportabilityundertheprovisionsof10CFR50.55(e).Thedeficiencyinvolvesexcessivevoltagedropsinthecontrolcircuitryofthemotorstartersforsomemotoroperatedvalves(MOVs).(Motorstartersaredeviceswhichprovidethecontrolofpowertomotors.)ForACpoweredMOVsrthemotorstarteroperatingcoilsaresuppliedviaacontroltransformertappedofftheMOVpowersupply.MultipleswitchesandrelaycontactsarewiredinthiscontrolcircuittomakeupthecontrollogicfortheMOV.AtSusquehannaSES,excessivevoltagedropsoccurinmotorstartercontrolcableswhensize2,orlarger,startersformotoroperatedvalvesareenergized.Thesevoltagedrops,whicharesevereenoughtopreventmotorstarteroperation,arecausedbythesizeableresistance(severalohms)oflonglengths(severalthousandEeet)ofsmall(114cu)controlcable.Twenty-two(22)size2orlargermotorstartersarelocatedinClasslEsafetysystemssuchasReactorRecirculationandResidualHeatRemovalandmustbecheckedtodetermineifexcessivevoltaged'ropsoccur.Sincethesevalvesarerequiredtooperatetomitigateadesignbasisevent,theaforementionedfailuretooperaterepresentsasignificantdeficiencyindesign.Therefore,thedeficiencyisdeemedreportableunder10CFR50.55(e).Further,sincethedetailsofthisreportprovide."informationrelevanttothereportingrequirementsof10CFR21,thiscorrespondenceisconsideredtoalsodischargeanyformalresponsibilityPPGLmayhaveforreportingincompliancethereto.Ao('galSI0$0g40PENNSYLVANIAPOWEREsLIGHTCOMPANY

\:Mr.Boy'ce'.5.GrierOctober20,1980PPGLEngineeringisintheprocessofevaluatingseveralalternativesinordertodetermineanoptimumcourseofaction.Wecurrentlyestimatethatafinalreportof'hedeficiencyandthecorrectiveactiontakenwillbetransmittedtoyouinJanuary,1981.Verytrulyyours,N.W.CurtisVicePresident-EngineeringaConstruction-NuclearFLW:mcbcc:Mr.VictorStello(15)Director-OfficeofInspection6EnforcementU.S.NuclearRegulatoryCommissionWashington,D.C.20555<Mr.G;--McDonald,-Director.OfficeofManagementInformation6Program-ControlU.S.NuclearRegulatoryCommissionWashington,D.C.20555Mr.RobertM.GalloU.S.NuclearRegulatoryCommissionP.O.Box52Shickshinny,Pennsylvania18655

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