ML18026A474

Provides Supplemental Info to 970407 License Amend Request Re Clarification of Scope of Response Time Testing. Calculation,Encl

ML18026A474
Person / Time
Site:	Susquehanna
Issue date:	04/14/1997
From:	BYRAM R G PENNSYLVANIA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML18026A475	List: ML18026A474 ML18026A476
References
PLA-4608, NUDOCS 9704220043
Download: ML18026A474 (11)

Text

4~~'@VV'iJ.'EGULATEINFORMATIONDISTRIBUTIO+YSTEM(RIDE)C-~~*ACCESSIONNBR:9704220043DOC.DATE:97/04/14'.NOTARIZED:NOFACIL:50-387Susqu'ehannaSteamElectricStation,Unit1,Pennsylva50-388SusquehannaSteamElectricStation,Unit2,PennsylvaAUTH.NAME'UTHORAFFILIATIONBYRAMFR.G.PennsylvaniaPower6LightCo.RECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk)

SUBJECT:

Providessupplementalinfoto970407licenseamendrequestreclarificationofscopeofresponsetimetesting.Calculation,encl.DISTRIBUTIONCODE:A001DCOPIESRECEIVED:LTRENCLSIZE:TITLE:ORSubmittal:GeneralDistributionNOTES:DOCKET050003870500038805000387GRECIPIENTIDCODE/NAMEPDl-2LAPOSLUSNYFCINTERNAL:ACRSNRR/DE/ECGB/ANRR/DRCH/HICBNRR/DSSA/SRXBOGC/HDS2EXTERNAL:NOACNOTES:COPIESLTTRENCL111111111111101111RECIPIENTIDCODE/NAMEPD1-2PDILET01CB,NRR/DSSA/SPLBNUDOCS-ABSTRACTNRCPDRCOPIESLTTRENCL1111111111110D0~E.NNOTETOALLMRIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE.TOHAVEYOURNAMEORORGANIZATIONREMOVEDFROMDISTRIBUTIONLISTSORREDUCETHENUMBEROFCOPIESRECEIVEDBYYOUORYOURORGANIZATION,CONTACTTHEDOCUMENTCONTROLDESK(DCD)ONEXTENSION415-2083TOTALNUM;-"ROFCOPIESREQUIRED:LTTR15ENCL14

.:'.PennsylvaniaPower&LightCompanyTwoNorthNinthStreet~Allentown,PA18101-1179~610/774-51514RobertG.ByramSeniorVicePresidentGenerationandChiefiVuclearOfJicer610/774-7502Fax:610/774-5019APR141997U.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskMailStationP1-137Washington,DC20555SUSQUEHANNASTEAMELECTRICSTATIONSUPPLEMENTALINFORMATIONSUPPORTINGPROPOSEDAMENDMENTNOS.205AND168CLARIFICATIONOFTHESCOPEOFRESPONSETIMETESTINGDocketNos.50-387and50-388

Reference:

(1)(2)(3)(4)(5)PP&LLetterPLA-4597,"ProposedAmendmentNo.205ToLicenseNPF-14andProposedAmendmentNo.168ToLicenseNPF-22:ClarificationOfTheScopeOfResponseTimeTesting,"datedApril4,1997.NRCLettertoB/VROwner'sGroup,datedDecember28,1994,transmittingEvaluationofLicensingTopicalReportNEDO-32291,"SystemAnalysesforEliminationofSelectedResponseTimeTestingRequirements."NRCLettertoPP&L,datedJuly11,1995,issuingAmendmentsNo.148toFacilityOperatingLicenseNPF-14andNo.118toFacilityOperatingLicenseNPF-22.GenericLetter93-08,"RelocationofTechnicalSpecificationTablesofInstrumentResponseTimeLimits,"datedDecember29,1993.BJVROwner'sGroupLicensingTopicalReportNEDO-32291,"SystemAnalysesforEliminationofSelectedResponseTimeTestingRequirements,"datedJanuary1994.,ThepurposeofthisletteristoprovidesupplementalinformationtosupporttheNRCreviewofproposedchangestoSusquehannaSteamElectricStation(SSES)Unit1andUnit2TechnicalSpecificationsclarifyingthescopeofresponsetimetesting.SubmittalofthisinformationwasagreedtobyPP&LatateleconferenceonApril10,1997withyourMessrs.Poslusny,LoeserandSchulten.TheproposedchangestoUnit1andUnit2TechnicalSpecificationsweresubmittedviaReferenceNo.1ThisletterprovidesinformationonthreetopicsdiscussedattheApril10,1997teleconference:(1)PP&L'sApplicationoftheB2TSensor(2)DerivationofSensorResponseTimeAdministrativeValues(3)PP&L's"Response"toImplementationRequirementsDelineatedintlieNRCSafetyEvaluationReport(ReferenceNo.2)~/9704220043970414PDRADOCK05000387PPDRimjilijiOIiiisimluW~O PLAA608FILESR41-2/A17-2DocumentControlDeskToicNo.1-PP&L'sAlicationoftheB2TSensorTheonlyapplicationatSSESfortheB2TmodeldeviceistheReactorProtectionSystem-ReactorSteamDomeHighPressurefunction,forwhichsensorresponsetimetestingrequirementshavenotbeeneliminated.TicNo2-DerivationfSensorResonseTimeAdministrativeValuesForthosechannels'whosesensorresponsetimetestshavebeeneliminated,butforwhichrelayresponsetimetestingisstillrequired,anassumedadministrativevalueforsensorresponsetimeisrequired.Theseadministrativevalues,or'penalties,'ereinvokedto"accountforthesensorresponsetimeinthetotalchannelresponsetimecalculations.ThisisapplicabletotheReactorProtectionSystem:ReactorVesselWaterLevel-LowLevelcriteria,theMainSteamLineIsolation:ReactorVesselWaterLevel-LowLowLow,Level1channel,theMainSteamLineIsolation:MainSteamLinePressure-Lowchannel,andtheMainSteamLineIsolation:MainSteamLineFlow-Highchannel.Thetablebelowlistseachofthesesignals,alongwiththetotalchannelresponsetimelimitlistedintheFSAR,andtheadministrativevalueforthesensorresponsetime.FUNCTIONNAMEReactorProtectionSystem:ReactorVesselWaterLevel-LowLevel3MainSteamLineIsolation:ReactorVesselWaterLevel-LowLowLow,LevelfMainSteamLineIsolation:MainStcamLinePressure-LowMainSteamLineIsolation:MainSteamLineFlow-HighINSTRUMENTMODELBartonModel288ABartonModel760BarksdaleModelB1T-M12SSGEBartonModel288AADMINISTRATIVEVALUEASSUMEDFORINSTRUMENTRESPONSETIME600milliseconds600milliseconds100milliseconds200millisecondsTOTALCHANNELRESPONSETIME1.05seconds1second1second500millisecondsInordertodetermineanassumedadministrativevalueforsensor,responsetime,PP&Lreviewedtheoperationalhistory(i.e.,themeasuredresponsetimes)sirlce1987.(Notethatthenecessary"design"datafromthemanufacturerwasnotavailable.)Thisdatawasevaluatedtodeterminethelongestsensorresponsetimeandthelongestrelayresponsetimeforeachofthechannels.Thesensor'penalty'i.e.,thenowassumedsensorresponsetime),wasselectedbaseduponthelongestsensorandrelayresponsetimes.This'penalty'aluewasthenaddedtoPP&L'sproceduresforcalculatingtotalchannelresponsetime.'orexample,thelongestinstrumentresponsetimetestresultfortheReactorProtectionSystemReactorVesselLowLevel3channels(levelswitchesA-Donbothunits)is556milliseconds.For PLA-4608FILESR41-2/A17-2DocumentControlDeskthepurp'oseofestablishinganadministrativevalueforsensorresponsetimetesting,thisnumberwasroundedupto600millisecondstodeterminetheassumedpenalty.'herelayresponsetime-testacceptancecriterionistheremainingportionoftheallowablechannelresponsetime(inthisexample,1.05secondsless600milliseconds,or450milliseconds).Shouldtherelayresponsetimetestresultsexceedthisvalue,thechannelwouldbedeclaredinoperableandtheappropriateTechnicalSpecificationLCOActionStatementswouldbeentered.I'InresponsetoarequestfromtheNRCstaF,PP&Lperformedanadditionalstatisticalanalysistoensurethattheselectedadministrativevaluesforsensorresponsetimewereconservative,basedonthePP&Lempiricaldata.PP&Lcalculateda95%confidencevalue,andconcludedthattheadministrativelimitsassumedforthesensorresponsetimewereconservativerelativetothestatistically-determinedresponsetimes.AttherequestoftheNRCstaffreviewer,theattachmenttothislettercontainsPP&LCalculationNo.EC-058-1011,"SensorResponseTimeValuesforSelectRPSandMSIVIsolationFunctions."Thiscalculationdocumentsthestatisticalevaluationreferencedabove,andincludesacompilationoftheoperationaldatausedtosupportthederivationofadministrativevalues.Additionally,asdiscussedpreviouslyandattheApril10,1997teleconference,PP&LwillsubmitachangetoitsITSsubmittal,currentlyunderreviewbytheNRC,todescribethattheadministrativevaluesestablishedforthesensorresponsetimesforthefourspecificfunctionsinquestionwerederivedfromoperationaldata.Thebasesclarificationwillalsoindicatethatthisapproachwastakenduetothefactthatthenecessary"design"datafromthemanufacturerwasnotavailable.ToicNo.3-PP&L's"Resonse"toImlementationReuirementsDelineatedintheNRCSafetEvaluationRertSERAsdescribedinReferenceNo.1,theNRCapproved(ReferenceNo.3)PP&L'srelocationofresponsetimetablesfromtheTechnicalSpecificationstotheFSARinaccordancewithGenericLetter93-08(ReferenceNo.4),concludingthattheprovisionsof10CFR50.59provideanacceptablemeanstocontrolchangestoresponsetimesinlieuofalicenseamendment.SubsequenttotherelocationofresponsetimetablesfromtheTechnicalSpecifications,PP&Lappliedtheprovisionsof10CFR50.59toeliminateselectedinstrumentandrelayresponsetimetestingfromtheFSARinaccordancewithguidelinescontainedwithintheBWROGLicensingTopicalReport(LTR)(ReferenceNo.5)andtheimplementationrequirementsdelineatedintheNRCSERfortheLTR.TheseNRCimplementationrequirementsactuallyconsistofstatementstobemadebylicenseeswithinlicenseamendmentrequeststomodifyTechnicalSpecificationresponsetimetables.However,duetothefactthatPP&LrelocatedtheresponsetimetestingtablestotheFSAR,andthuswasabletomakechangestothetablesunder10CFR50.59,suchalicenseamendmentrequest(includingimplementationrequirementstatements)wasnotnecessary.

4PLAA608FILESR41-2/A17-2DocumentControlDeskInresponsetoarequestfromthestafFonApril10,1997,PAL'sactionstakeninresponsetoeachofthestatementslistedintheSERaredescribedbelow.Itshouldbenotedthattheseactionswereexe'cutedaspartofPPkL'simplementationoftheLTR.TheSERstates"...licenseesmuststatethattheyarefollowingtherecommendationsfromEPRINP-7243'InvestigationofResponseTimeTestingRequirements'ndthereforearerequiringthefollowingactions:(a)"Priortoinstallationofanewtransmitter/switchorfollowingrefurbishmentofatransmitter/switch(e.g.,sensorcellorvariabledampingcomponents),ahydraulicRTTshallbeperformedtodetermineaninitialsensor-specificresponsetimevalue,and"PP&LAcfions:TraininghasbeenprovidedfoappropriateEngineeringpersonnelandInstrumentation&Control(I&C)personneltoassurefamiliaritywiththisrequirement.AppropriateplantmodificationandI&Cprocedureswererevisedfoincludethisrequirement.(b)"Fortransmittersandswitchesthatusecapillarytubes,capillarytubetestingshallbeperformedafterinitialinstallation'andafteranymaintenanceor.modificationactivitythatcoulddamagethelines."PP&LActions:TraininghasbeenprovidedfoappropriateEngineeringpersonnelandInsfrumentafion&Control(1&C)personnelfoassurefamiliarifywiththisrequirement.AppropriafeplantModificationandI&Cprocedureswererevisedtoincludethisrequirement.TheSERfurtherstatesthatlicenseerequestsmustaddresstheitemslistedbelow:(a)"Thatcalibrationisbeingdonewithequipmentdesignedtoprovideastepfunctionorfastrampintheprocessvariable."PP&LActions:Existingproceduresweredeferminedtobeadequateforfhoseinstrumenfswithaninternalindicator.Forblindswitches(Static0Ring,Barksdale),apost-calibrationfunctionalresponsetimefesthasbeenaddedtothecalibrationprocedures.Thisfestprovidesafastrampsignaltotheinstrumentafplus-or-minus10percentofthesetpoinl.Thisisdoneaspartoffhecalibrationonan18-monthbasisgormerfrequencyofresponsetimetesting). PLA4608FILESR41-2/A17-2DocumentControlDesk(b)"Thatprovisionshavebeenmadetoensurethatoperatorsandtechniciansareawareoftheconsequencesofinstrumentresponsetimedegradation,andthatapplicableprocedureshavebeenreviewedandrevisedasnecessarytoassurethattechniciansmonitorfor.responsetimedegradationduringtheperformanceofcalibrationsandfunctionaltests."PP&LActions:TraininghasbeenprovidedtoOperationsandI&Cpersonneltoassurefamiliaritywiththisrequirement.Astatemenfrequiringfhattechniciansmonitorforresponsetimedegradationduring1heperformanceofcalibrationsandfunctionaltestshasbeenaddedtotheapplicabletestproceduresasastandardprerequisite.(c)"Thatsurveillancetestingprocedureshavebeenreviewedandrevisedifnecessarytoensurecalibrationsandfunctionaltestsarebeingperformedinamannerthatallowssimultaneousmonitoringofboththeinputandoutputresponseoftheunits."PP&I.Actions:Functional1estsandcalibrationswerereviewedanddeferminedfobeperformedinamanner1hatallowssimultaneousmoni1oringofboththeinputandoufputresponseoftheunits.(d)"ThatforanyrequestinvolvingtheeliminationofRTTforRosemountpressuretransmitters,thelicenseeisinfullcompliancewiththeguidelinesofSupplement1toBulletin90-01,'LossofFill-OilinTransmittersManufacturedbyRosemount'PP&I,Actions:None.TherearenoRosemount1ransmi1tersinanyoftheresponsetimetestedloops.(e)"ThatforthoseinstrumentswherethemanufacturerrecommendsperiodicRTTaswellascalibrationtoensurecorrectfunction,thelicenseehasensuredthateliminationofRTTisneverthelessacceptablefortheparticularapplicationinvolved."PPdcLActions:AreviewofEPRIreportNP-7423,"InvestigationofResponseTimeTestingRequiremenfs,"andcallstovariousvendorsensuredthaftheabovestatement~wasperformed.Nomanufactureroftheinstrumentsfortheseapplicationsrecommendsperiodicresponsefimefesfing.Ifyouhaveanyadditionalquestions,pleasecontactMs.K.R.Leoneat(610)774-4023.Verytrulyyours,R.G.mAttachment I' PLA-4608FILESR41-2/A17-2DocumentControlDeskcopy:NRCRegionIMr.K.Jenison,NRCSr.ResidentInspectorMr.C.Poslusny,NRCSr.ProjectManager

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ATTACHMENT1TOPLA-4608PPALCalculationNo.EC-058-1011SensorResponseTimeValuesforSelectRPSandMSIVIsolationFunctions