ML17228A885
| ML17228A885 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 09/30/1994 |
| From: | UDY A C EG&G IDAHO, INC., IDAHO NATIONAL ENGINEERING & ENVIRONMENTAL LABORATORY |
| To: | NRC |
| Shared Package | |
| ML17228A883 | List: |
| References | |
| CON-FIN-L-1695 EGG-DNSP-11487, EGG-DNSP-11487-ERR, IEB-90-001, IEB-90-1, TAC-M85446, TAC-M85447, NUDOCS 9410250149 | |
| Download: ML17228A885 (21) | |
Text
EGG-DNSP-11487TECHNICALEVALUATIONREPORTEvaluationofUtilityResponsetoSupplement1toNRCBulletin90-01:St.Lucie-I/-2DocketNos.50-335and50-389AlanC.UdyPublishedSeptemb'er1994EGSGIdaho,Inc.IdahoNationalEngineeringLaboratoryIdahoFalls,Idaho83415PreparedfortheU.S.NuclearRegulatoryCommissionWashington,D.C.20555UnderDOEContractNo.DE-AC07-76ID01570FINNo.L1695,TaskNo.11aTACNos.M85446andM85447e4~0a50149e40e30PDRADOCK05000335',P-,;.PDR~i 0\~
SUMMARYThisreportdocumentstheEGKGIdaho,Inc.,reviewoftheFloridaPowerandLightCompanysubmittalsthatrespondtoSupplement1toNRCBulletin90-01forUnitNos.1and2oftheSt.LuciePlant.ThisNRCBulletinprovidesinformationregardingthelossoffill-oilincertainpressureanddifferentialpressuretransmittersmanufacturedbyRosemount,Inc.ThisreportfindsthatthelicenseecompliestotherequestedactionsandthereportingrequirementsoftheSupplement.FINNo.L1695,TaskNo.llaBERNo.320-19-15-05-0DocketNos.50-335and50-389TACNos.M85446andM85447 e
PREFACEThisreportissuppliedaspartofthe"TechnicalAssistanceinSupportoftheInstrumentationandControlsSystemsBranch."ItisbeingconductedfortheU.S.NuclearRegulatoryCommission,OfficeofNuclearReactorRegulation,DivisionofReactorControlsandHumanFactors,byEGLGIdaho,Inc.,DOE/NRCSupportProgramsUnit.
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CONTENTSUMMARYo~~~~~~~~~~~~~~~~~~~~~~~~~~t~~~~~~~~~~~~~~~~~~~~~tt~~~~~~~~~SREFACE..............................................................Pill1.INTRODUCTION..~.................................-..........,.....12.NRCSPECIFIEDRE(UESTEDACTIONS.................................43.EVALUATION.....;................................................7'.1EvaluationofLicenseeResponsetoReportingRequirements.73.2EvaluationofLicenseeResponsetoRequestedActions......74.CONCLUSIONS..~~~~~~~~~~~~~~~t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~125.REFERENCES......................................................13
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EvaluationofUtilitResonsetoSulement1toNRCBulletin90-01:St.Lucie-1-21.INTRODUCTIONTheNRCissuedBulletin90-01onMarch9,1990(Reference1).ThatBulletindiscussedcertain,Rosemountpressureanddifferentialpressuretransmittermodelsidentifiedbythemanufactureraspronetofill-oilleakage.TheBulletinrequestedlicenseestoidentifywhetherthesetransmitterswereormaylaterbeinstalledinsafety-relatedsystems.Actionsweredetailedforlicenseeimplementationforcertainidentifiedtransmittersinstalledinasafety-relatedsystem..Thesesameactionsapplytothoseidentifiedtransmitterspresentlyheldininventoryforlaterinstallationinasafety-relatedsystem.Withthegradualleakageoffill-oil,thetransmitterwouldnothavethelongtermaccuracy,timeresponse,andreliabilityneededforitsintendedsafetyfunction.Further,thisconditioncouldgoundetectedoveralongperiod.Redundantinstrumentchannelsaresubjecttothesamedegradationmechanism.Thisincreasesthepotentialforacommonmodefailure.Thus,thispotentialfailuremechanismraisedconcernforthereliabilityofreactorprotectionsystems(RPS),engineeredsafetyfeatures(ESF)actuationsystems,andanticipatedtransientwithoutscram(ATWS)mitigatingsystems.Toachievehighfunctionalreliability,theremustbealowprobabilityofcomponentfailurewhileoperating,withanyfailuresreadilydetectable.Supplement1toNRCBulletin90-01(Reference2)wasissuedonDecember22,1992.TheSupplementinformedlicenseesofNRCstaffactivitiesregardingthesubjecttransmitters,andnotedcontinuingreportsoftransmitterfailures.The'RCrequestedlicenseeactiontoresolvetheissue.TheSupplementalsoupdatedthe.informationcontainedintheoriginalbulletin.Thelicenseewasrequestedtoreviewtheinformationanddetermineifitwasapplicableattheirfacility.Further,thelicenseewasrequestedtomodifytheiractionsandenhancedsurveillancemonitoringprogramstoconformwiththedirectiongiven.Finally,thelicenseewasinstructedto1 respondtotheNRC.,TheReuestedActionsinSupplement1toNRCBulletin90-OlsupersedetheoriginalNRCBulletin90-01ReuestedActions.InrespondingtoSupplement1toNRCBulletin90-01,thelicenseeisdirectedtoaddressthreeitems.l.AstatementeithercommittingthelicenseetotaketheNRCBulletin90-01,Supplement1,ReuestedActionsortakingexceptiontothoseactions.2.Addressingtheactionscommittedtointheabovestatement,provide:a~b.C.alistofthespecificactions,includinganyjustifications,tobetakentocompletethecommitment,ascheduleforcompletion,andaftercompletion,astatementconfirmingtheactionscommittedtoarecomplete.3.AstatementidentifyingtheNRCBulletin90-01,Supplement1,ReuestedActionsnottaken,alongwithanevaluationprovidingthebasisforexemption.Inimplementingthereplacement'ptionoftheNRCReuestedActions,plantshutdownexclusivelyforreplacingthetransmittersisnotrequired.Thisallowanceinfersthatreplacementscanbescheduled.Withreplacementinatimelymanner,enhancedsurveillancemonitoringforinterimoperationisnotrequired.TheFloridaPowerandLightCompany,thelicenseeforUnitNos.1and2oftheSt.LuciePlant,respondedtoSupplement1ofNRCBulletin90-01withaletterdatedHarch5,1993(Reference3).ThelicenseeprovidedadditionalinformationonMarch9,1994(Reference4).ThelicenseenotifiedtheNRCthattheirtransmitterreplacementswerecompleteonAugust18,1994(Reference5).Thistechnicalevaluationreportevaluatesthecompletenesso'2 thosesubmittals.Italsodetermineswhetherproposedsurveillancemethodsareadequatetodeterminefill-oilloss-causeddegradationofthetransmitter..Finally,thisreportaddressestheintervalofsurveillanceproposedbythelicenseefor'anytransmittersincludedintheenhancedsurveillancemonitoringprogram.HanyRosemounttransmitterfailureshavebeenattributedtotheuseofstainlesssteel"0"-ringsbetweenthesensingmoduleandtheprocessflanges.RosemountimprovedthemanufacturingprocessfortransmittersmanufacturedafterJulyll,1989.Thoseimprovementsincludedalimitofthetorqueappliedtotheflangebolts.Thislimitsthestresscausedinthesensingmodulebythe"0"-ring.Post-productionscreening,includingpressuretestingofthesensingmoduleforthispotentiallatentdefect,wasalsoimplementedatthattime.Therefore,asdescribedinSupplement1ofNRCBulletin90-01,thoseRosemounttransmittersmanufacturedafterJuly11,1989,arenotsubjecttothisreview.
2.NRCSPECIFIEDREQUESTEDACTIONSTheNRCstaffspecifiedthefollowingReuestedActionsoflicenseesofoperatingreactors.1.ReviewplantrecordsandidentifythefollowingRosemounttransmitters(ifmanufacturedbeforeJuly11,1989)thateitherareusedinormaybeusedineithersafety-relatedorATWSmitigatingsystems.RosemountHodel1153,SeriesBRosemountHodel1153,SeriesDRosemountHodel1154Followingidentification,thelicenseeistoestablishthefollowing:'a~Forthoseidentifiedtransmittershavinganormaloperatingpressuregreaterthan1500psi,andareinstalledaspartofreactorprotectiontripsystems,ESFactuationsystems,orATWSmitigatingsystems,eitherreplacethetransmitterinanexpeditedmanner,ormonitormonthly,forthelifeofthetransmitter,usinganenhancedsurveillanceprogram.Iftheidentifiedtransmitterexceedsthe60,000psi-monthorthe130,000psi-monthcriterion(dependingontherangecodeofthetransmitter)establishedbyRosemount,enhancedsurveillanceonarefueling(notexceeding24months)basisisacceptable.Underthisoption,justificationmustbebasedontheservicerecordandthespecificsafetyfunctionofthetransmitter.Thatjustificationcanbebasedonhighfunctionalreliabilityprovidedbyredundancyordiversity.b.Forthoseidentifiedtransmittershavinganormaloperatingpressuregreaterthan1500psi,andareinstalledaspartofasafety-relatedsystemotherthanreactorprotectiontripsystems,ESFactuation,orATWSmitigatingsystems,eitherreplacethetransmitterormonitorquarterly,forthelifeofthetransmitter,usinganenhancedsurveillanceprogram.Iftheidentifiedtransmitterexceedsthe60,000psi-monthorthe130,000psi-monthcriterion(dependingontherangecodeofthetransmitter)establishedbyRosemount,enhancedsurveillanceonarefueling(notexceeding24months)basisisacceptable.Underthisoption,justificationmustbebasedontheservicerecordandthespecificsafetyfunctionofthetransmitter.That justificationcanbebasedonhighfunctionalreliabilityprovidedbyredundancyordiversity.Forboilingwaterreactors(BWR)--Forthoseidentifiedtransmittershavinganormaloperatingpressuregreaterthan500psiandlessthanorequalto1500psi,andareinstalledaspartofreactorprotectiontripsystems,ESFactuationsystems,orATWSmitigatingsystems,eitherreplacethetransmitter,ormonitormonthlywithanenhancedsurveillancemonitoringprogram,untilthetransmitterreachesthedesignated(byRosemount)psi-monthcriterion(60,000psi-monthor130,000psi-month,dependingonthetransmitterrangecode).FortransmittersthatprovidesignalstotheRPSorATWStripsforhighpressureorlowwaterlevel,theenhancedsurveillancemustbemonthly.Forothertransmittersinthisclassification,enhancedsurveillanceonarefueling(notexceeding24months)basisisacceptable.Underthisoption,justificationmustbebasedontheservice.recordandthespecificsafetyfunctionofthetransmitter.Thatjustificationcanbebasedonhighfunctionalreliabilityprovidedbyredundancyordiversity.Forpressurizedwaterreactors(PWR)--Forthoseidentifiedtransmittershavinganormaloperatingpressuregreaterthan500psiandlessthanorequalto1500psi,andareinstalledas.partofreactorprotectiontripsystems,ESFactuationsystems,orATWSmitigatingsystems,eitherreplacethetransmitter,ormonitorwithanenhancedsurveillancemonitoringprogram,untilthetransmitterreachesthedesignated(byRosemount)psi-monthcriterion(60,000psi-monthor130,000psi-month,dependingonthetransmitterrangecode)onarefueling(notexceeding24months)basis.Forthoseidentifiedtransmittershavinganormaloperatingpressuregreaterthan500psiandlessthanorequalto1500psi,andareinstalledaspartofasafety-relatedsystemotherthanreactorprotectiontripsystems,ESFactuation,orATWSmitigatingsystems,eitherreplacethetransmitter,ormonitorwithanenhancedsurveillancemonitoringprogram,untilthetransmitterreachesthedesignated(byRosemount)psi-monthcriterion(60,000psi-monthor130,000psi-month,dependingonthetransmitterrangecode)onarefueling(notexceeding24months)basis.
e.Thosetransmittershavinganormaloperatingpressuregreaterthan500psiandlessthanorequalto1500psi,andhaveaccumulatedsufficientpsi-monthoperatinghistorytoexceedthecriterionestablishedbyRosemount,maybeexcludedfromtheenhancedsurvei.llancemonitoringprogramatthediscretionofthelicensee.However,thelicenseeshouldretainahigh'evelofconfidencethatahighlevelofreliabilityismaintainedandthattransmitterfailureduetolossoffill-oilisdetectable.Thosetransmittershavinganormaloperatingpressurelessthanorequalto500psimaybeexcludedfromtheenhancedsurveillancemonitoringprogramatthediscretionofthelicensee.However,thelicenseeshouldretainahighlevelofconfidencethatahighlevelofreliabilityismaintainedandthattransmitterfailureduetolossoffill'-oilisdetectable.2.Evaluatetheenhancedsurveillancemonitoringprogram.Theevaluationistoensurethemeasurementdatahasanaccuracycommensuratewiththeaccuracyneededtocomparethedatatothemanufacturersdriftdatacriteria.Itisthiscomparisonthatdeterminesthedegradationthresholdforlossoffill-oilfailuresofthesubjecttransmitters.TheSupplementalsostatestheNRCmayconductauditsorinspectionsinthefuturetoverifycompliancewiththeestablishedrequirements.
3.EVALUATIONThelicenseerespondedtoSupplement1ofNRCBulletin90-01onMarch5,1993.ThelicenseeprovidedadditionalinformationonMarch9,1994.ThelicenseenotifiedtheNRCthattheirtransmitterreplacementswerecompleteonAugust19,1994.ThoseresponseswerecomparedtotheBulletin~Reortinddidibdb1.ThhavingRosemounttransmittersthataresubjecttotheReuestedActionsoftheSupplement.OtherRosemounttransmittersare'outsidethescopeoftheSupplementduetoreplacementorrefurbishment.3.1EvaluationofLicenseeResonsetoReortinReuirementsThelicenseestates,inReference3,thattheyintendtoimplementtheReuestedActionsdetailedinSupplement1ofNRCBulletin90-01.Includedwiththatstatementisclarification,interpretation,andthelimitsplacedonthatcommitment.ThelicenseedescribedthespecificactionstakentoexecutetheReuestedActions.Thelicenseeprovidedastatementthatthe~ReuestedActionsarecompleteonAugust18,1994.Thelicenseesubmitt'alsconformtotheReortinReuirementsofSupplement1ofNRC,Bulletin90-01.3.2EvaluationofLicenseeResonsetoReuestedActionsSupplement1ofNRCBulletin90-01requestedlicenseeactiontoresolvetheissueoffill-oilleakageinRosemounttransmitters.ThisTechnicalEvaluationReportsummarizestheReuestedActionsandtheassociatedtransmi'ttercriteriainSection2.RosemounttransmittersmanufacturedafterJuly11,1989arenotsubjecttotheSupplementrequirementsoranenhancedsurveillancemonitoringprogram.Thelicensee'esponsetotheSupplementisdiscussedinthefollowingsections.
3.2.1LicenseeResonsetoReuestedAction1.aUnitNo.1ThelicenseestatesthereareRosemounttransmittersfromthistransmitterclassificationatUnitNo.1oftheSt.LuciePlant.Thelicenseescheduledthesubjecttransmittersforreplacementinthespringof1993.However,thelicenseecommi.ttedthatifadelayintransmitterinstallationoccurred,thelicenseewillmonitorthattransmittermonthlyaspartoftheirenhancedsurveillancemonitoringprogram.ThelicenseestatedtheywillnotincreasethesurveillanceintervalfrommonthlywithoutprovidingjustificationtotheNRC.Thelicenseeactionsfortransmittersintransmitterclassificationl.aatUnitNo.1areacceptable.AsnotedinReference5,thelicenseeactionsforthistransmitterclassificationarecomplete,andthetransmittersreplacedasscheduled.UnitNo.2ThelicenseestatesthereareRosemounttransmittersfromthistransmitterclassificationatUnitNo.2oftheSt.LuciePlant.However,allUnitNo.2RosemounttransmittersinthistransmitterclassificationweremanufacturedafterJuly11,1989,andareexemptfromtheSupplementrequirements.3.2.2LicenseeResonsetoReuestedAction1.b.UnitNo.1ThelicenseestatesthereareRosemounttransmittersfromthistransmitterclassificationatUnitNo.1oftheSt.LuciePlant.Thelicenseescheduledthesubjecttransmittersforreplacementinthespringof1993.However,thelicenseecommitted,inReference3,thatifadelayintransmitterinstallationoccurred,thelicenseewillmonitorthattransmitter quarterlyaspartoftheirenhancedsurveillancemonitoringprogram.ThelicenseestatestheywillnotincreasethesurveillanceintervalfromquarterlywithoutprovidingjustificationtotheNRC.Thelicenseeactionsfortransmittersintransmitterclassification1.batUnitNo.1areacceptable.AsnotedinReference5,thelicenseeactionsforthistransmitterclassificationarecomplete,andthetransmittersreplaced.asscheduled.UnitNo.2ThelicenseestatesthereareRosemounttransmittersfromthistransmitterclassificationatUnitNo.2oftheSt.LuciePlant.Thelicenseescheduledthesubjecttransmittersforreplacementinthefallof1993.Thelicenseecommitted,inReference3,tomonitorthesetransmittersquarterlyaspartoftheenhancedsurveillancemonitoringprogramuntilreplaced.SomeoftheUnitNo.2RosemounttransmittersweremanufacturedafterJulyll,1989,andareexemptfromtheSupplementrequirements.Thelicenseeactionsfortransmittersintransmitterclassification1.batUnitNo.2areacceptable.AsnotedinReference5,thelicenseeactionsforthistransmitterclassificationarecomplete,andthetransmittersreplacedasscheduled.3.2.3LicenseeResonsetoReuestedAction1.cThelicenseestatesthereareRosemounttransmittersfromthistransmitterclassificationattheSt.LuciePlant.Thelicenseestatesthatthesetransmitterswillparticipateinanenhancedsurveillancemonitoringprogramonarefuelingbasis.Theintervalwillnotexceed24months.Eitherreplacementorsuccessfullyachievingthepsi-monthmaturitythresholdwillremoveatransmitterfromtheenhancedsurveillancemonitoringprogram.ReplacementwithatransmittermanufacturedafterJuly11,1989,removesthetransmitterfromtheSupplementrequirements.Successfullyachievingmaturitytransfersthetransmittertotransmitterclassificationl.e.SeeSection3.2.5.
3.2.4LicenseeResonsetoReuestedAction1.dThelicenseestatesthereareRosemounttransmittersfromthistransmitterclassificationattheSt.LuciePlant.Thelicenseestatesthatthesetransmitterswillparticipateinanenhancedsurveillance-monitoringprogramonarefuelingbasis.Theintervalwillnotexceed24months.Eitherreplacementorsuccessfullyachievingthepsi-monthmaturitythresholdwillremove'atransmitterfromtheenhancedsurveillancemonitoringprogram.ReplacementwithatransmittermanufacturedafterJuly11,1989,removesthetransmitterfromtheSupplementrequirements.Successfullyachievingmaturitytransfersthetransmittertotransmitterclassificationl.e.SeeSection3.2.5.3.2.5LicenseeResonsetoReuestedActionl.eAstransmittersintransmitterclassification1.cand1.dexceedthepsi-monthmaturitythreshold,thelicenseewillremovethosetransmittersfromtheenhancedsurveillancemonitoringprogram.TheSupplement'ermitsthisaction.TheSupplementrequiresthelicenseetomaintainahighdegreeofconfidencethatthesetransmittersremainhighlyreliable.Thelicenseestatesthatbeforeremovingatransmitterfromtheenhancedsurveillancemonitoringprogram,thetransmitterwillexhibitnoexcessivedriftorsluggishness.Thelicenseestatesthatexistingmaintenanceandsurveillanceprogramscandetectfuturefailuresduetothelossoffill-oil.3.2.6LicenseeResonsetoReuestedAction1.fThelicenseestatesthereareRosemounttransmittersfromthisclassificationattheSt.LuciePlant.Atlicenseediscretion,thesetransmittersarenotpartoftheenhancedsurveillancemonitoringprogram.TheSupplementpermitsthisaction.10 TheSupplementrequiresthelicenseetomaintainahighdegreeofconfidencethatthesetransmittersremainhighlyreliable.Thel,icenseestatesthatexistingmaintenanceandsurveillanceprogramscandetectfuturefailuresduetothelossoffill-oil.3.2.7EnhancedSurveillanceNonitorinProramThelicenseedescribedthemonitoring'intervalsforthedifferenttransmitterclassifications.Thelicensee,inaddressingReuestedAction2oftheSupplement,statestheirenhancedsurveillancemonitoringprogramusestheguidelinesofRosemountTechnicalBulletinNo.4.FollowingtheguidelinesofRosemountTechnicalBulletinNo.4satisfiestherequirementsoftheSupplementandisacceptable.
4.CONCLUSIONSBasedonourreview,wefindthelicenseehascompletedthereportingrequirementsofSupplement1ofNRCBulletin90-01.Further,thelicenseeconformstotheReuestedActionsofSupplement1toNRCBulletin90-01.12 5.REFERENCESNRCBulletinNo.90-01:"LossofFill-oilinTransmittersManufacturedbyRosemount,"March9,1990,OHBNo.3150-0011.NRCBulletinNo.90-01,Supplement1:"LossofFill-oilinTransmittersManufacturedbyRosemount,"December22,1992,OMBNo.3150-0011.Letter,Florida.PowerandLightCompany(D.A.Sager)toNRC,"NRCBulletin90-01Supplement1Response,"March5,1993,L-93-61.Letter,FloridaPowerandLightCompany(D.A.Sager)toNRC,"NRCBulletin90-01Supplement1AdditionalInformation,"March9,1994,L-94-061.L'etter,FloridaPowerandLightCompany(D.A.Sager)toNRC,"NRCBulletin90-01Supplement1AdditionalInformation,"August18,1994,L-94-210.13