ML17331B093
| ML17331B093 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 12/03/1993 |
| From: | FITZPATRICK E INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| To: | MURLEY T E NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML17331B094 | List: |
| References | |
| AEP:NRC:1181C, NUDOCS 9312100055 | |
| Download: ML17331B093 (44) | |
Text
,ACCELERATEDISTRIBUTIONDEMOTRATIONSYSTEM<s.REGULATORYINFORMATIONDXSTRXBUTIONSYSTEM(RIDS)ACCESSIONNBR:9312100055,DOC.DATE:93/12/03NOTARIZED:NODOCKETFACXL:50-316DonaldC.CookNuclearPowerPlant,Unit2,IndianaM05000316AUTH.NAMEAUTHORAFFILIATIONFXTZPATRXCK,E.XndianaMichiganPowerCo.(formerlyIndiana6MichiganEleRECXP.NAMERECIPXENTAFFILIATIONMURLEY,T.E.DocumentControlBranch(DocumentControlDesk)SUBZECT:ProvidessupplementalinforeinstrumentdriftinresponsetoNRCrequeston930416TSintervalextensionsforCycle9toavoidunnecessaryshutdown.DISTRIBUTIONCODE:AOOIDCOPIESRECEIVED:LTR(ENCL(SIZE:+TITLE:ORSubmittal:GeneralDistribution=-NOTES'RECIPIENTIDCODE/NAMEPD3-1LAWETZEL,BINTERNAL:NRR/DE/EELBNRR/DRCH/HICBNRR/DSSA/SPLBNUDOCS-ABSTRACTOGC/HDS2EXTERNAL:NRCPDRCOPIESLTTRENCL1122111111111011RECIPIENTIDCODE/NAMEPD3-1PDNRR/DORS/OTSBNRR/DRPWNRR/DSSA/SRXBCBE01NSXCCOPIESLTTRENCL11111111101111DDRDNOTETOALL"RIDS"RECIPIENTS:D~:,rDPLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMP1-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISISFORDOCUMENTSYOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:LTTR16ENCL14 It1~ea"4 IndianaMichip~PowerComp~P.O.Box1663>Coiumbus,OH43216AEP:NRC:1181CDonaldC.CookNuclearPlantUnit2DocketNo.50-316LicenseNo.DPR-74SUPPLEMENTALINFORMATIONCONCERNINGSURVEILLANCEINTERVALEXTENSIONFORUNIT2CYCLE9U.S.NuclearRegulatoryCommissionDocumentControlDeskWashington,D.C.20555Attn:T.E.MurleyDecember3,1993
DearDr.Murley:
InourApril16,1993,AEP:NRC:1181letterwerequestedcertaintechnicalspecificationintervalextensionsfortheDonaldC.CookNuclearPlantUnit2Cycle9toavoidanunnecessaryshutdown.Thepurposeof.thisletter.istoprovidesupplementalinformationregardinginstrumentdrift,asrequestedbyyourstaff.The-instrumentdriftdataiscontainedinAttachment1.Wearealsoprovidinganupdateofthetechnicalspecificationsthatrequireanextension.ThisinformationiscontainedinAttachments2through4.Webelievethattheproposedchangeswillnotresultin1)asignificantchangeinthetypesofeffluentsorasignificantincreaseintheamountofanyeffluentsthatmaybereleasedoffsite,or2)asignificantincreaseinindividualorcumulativeoccupationalradiationexposure.TheseproposedchangeshavebeenreviewedandapprovedbythePlantNuclearSafetyReviewCommitteeandwillbereviewedbytheNuclearSafetyDesignReviewCommitteeatthenextscheduledmeeting.Incompliancewiththerequirementsof10CFR50.91(b)(1),copiesofthisletteranditsattachmentshavebeentransmittedtoMr.J.R.PadgettoftheMichiganPublicServiceCommissionandtotheMichiganDepartmentofPublicHealth.9312100055931203PDRADOCK05000316PPDR IIlv'1 Dr.T.E.MurleyAEP:NRCt1181CThisletterissubmittedpursuantto10CFR50.30(b),and,assuch,anoathstatementisattached.Sincerely,p~)VicePresidentAttachmentscc:A.A.BlindG.CharnoffJ.B.Martin-RegionIIINFEMSectionChiefNRCResidentInspectorJ.R.Padgett Dr.T.E.Murley3AEP:NRCfl181Cbc:S.J.BrewerD.H.Malin/K.J.Toth/M.I.TerryM.L.Horvath-Brldgman-w/oattachmentsJ.B.Shinnock-w/oattachmentsW.G.Smith,Jr./S.H.Steinhart/R.C.CarruthJ.B.Hickman,NRC-Washington,D.C.B.A.Wetzel,NRC-Washington,D.C.AEP:NRC:1181CDC-N-6015.1w/oattachments STATEOFOHIO)COUNTYOFFRANKLIN)E.E.Fitzpatrick,beingdulysworn,deposesandsaysthatheistheVicePresidentoflicenseeIndianaMichiganPowerCompany,thathehasreadtheforgoingREQUESTFORADDITIONALINFORMATIONCONCERNINGSURVEILLANCEINTERVALEXTENSIONFORUNIT2CYCLE9andknowsthecontentsthereof;andthatsaidcontentsaretruetothebestofhisknowledgeandbelief.Subscribedandsworntobeforemethis~~dayof19~9NOTARYPUBLICRlTADHILLNOTARYPUBLIC.STATEOFOHIO fLil~-'~e'>p Attachment1toAEP:NRC:1181CSupplementalInformationonInstrumentDriftforDonaldC.CookNuclearPlantUnit2 Attachment1toAEP:NRC:1181CPage1ThedatainTables1(PressurizerWater.LevelDrift),2(PressurizerPressureDrift)and3(RTDDrift)clearlyindicatethatinstrumentdriftwillbewithinacceptablelimitswhileoperatingintherequestedsurveillanceextensionperiod.PRESSURIZERWATERLEVELCHANNELCALIBRATIONForthePressurizerWaterLevelchannelcalibration,weareonlyseekingasurveillanceextensionforoneofthethreechannels,NLP-153,asdescribedinAEP:NRC:1181(April16,1993).NLP-151andNLP-152canbecalibratedatpowerwithoutplacingtheunitinjeopardy.However,wehaveprovideddatafor.allthreesetsofinstrumentssincethe"asfound"dataforNLP-153forthelastsurveillancewasunusableforthisanalysis.Discussionconcerningthisdataappearsattheendofthisattachment.Table1providesinformationonthemaximumallowedpercentspanerror(+5.27%,-3.27%),tripsetpoint(92%ofspan),driftextrapolationmethodology,andmargintotripsetpointcalculationmethodology.TablelAcontainsthemeasured"asfound"and"asleft"dataforthepastthreesurveillances.Table1Bliststheresultsofthedriftextrapolationcalculationsandcomparisonstotheprotectivetripsetpoints.AscanbeseenbyexaminingtheextrapolatedpercentspanerrorresultsinTable1Bandcomparingthemtothemaximumallowedpercentspanerroratthepressurizerwaterlevelhighreactortripsetpoint,excessmarginexists.Thesmallestamountofmargin(extrapolatedtoAugust13,1994)atthetripsetpointis+0.06%onNLP-153basedontheAugust24'990@calibrationdata.Allotherextrapolationsyieldedexcessmarginofatleast1.35%tothetripsetpoint.Basedontheresultsofthisanalysis,webelievethatthedriftassociatedwithNLP-153willbewithintherequiredmargintothetripsetpointandwillnotadverselyimpactthesafeoperationoftheplant.PRESSURIZERPRESSURECHANNELCALIBRATIONForthePressurizerPressurechannelcalibration,weareonlyseekingasurveillanceextensionfortwoofthefourchannels,NPP-153andNPS-153,asdescribedinAEP:NRC:1181.NPP-151andNPP-152canbecalibratedatpowerwithoutplacingtheunitin)eopardy.Table2providesinformationonthemaximumallowedpercentspanerror.(f3.25%),tripsetpoint(lowsetpoint=1950psior31.25'4ofspan;highsetpoint=2385psior85.625%ofspan),driftextrapolationmethodology,andmargintotripsetpointcalculationmethodology.Table2Acontainsthemeasured"asfound"and"asleft"dataforthepastthreesurveillances.Table2Bliststheresultsofthedriftextrapolationcalculationsandcomparisonstotheprotectivetripsetpoints.AscanbeseenbyexaminingtheextrapolatedpercentspanerrorresultsinTable2Bandcomparingthemtothemaximumallowedpercentspanerroratthepressurizerpressurelowandhighreactortripsetpoint,excessmarginexists.
Attachment1toAEP:NRC:1181CPage2Thesmallestamountofmargin(extrapolatedtoAugust13,1994)atthelowtripsetpointis+0.71%onNPS-153basedontheJuly25,1988,calibrationdata.Thesmallest.amount.ofmargin(extrapolatedtoAugust13,1994)atthehightripsetpointis+0.50%,alsoonNPS-153basedontheJuly25,1988,calibrationdata.Allotherextrapolationsyieldedexcessmarginofatleast1.61%tothetripsetpoints.Basedontheresultsofthisanalysis,webelievethatthedriftassociatedwithNPP-153andNPS-153willbewithinourmaximumallowedpercentspanerror,bewithintherequiredmargintothetripsetpoints,andwillnotadverselyimpactthesafeoperationoftheplant.RTDCHANNELCALIBRATIONAsdescribedinAEP:NRC:1181,weareseekingrelieffromallT/SsurveillanceswhicharedependentontheRTDchannelcalibration.Table3providesinformationonthe'maximumallowedtemperaturedeviation(NarrowRange[NR]:21.2'FandWideRange[WR):f8.4'F)andonthedriftextrapolationmethodology.Tables3Aand3BcontainthemeasureddataforthepastthreesurveillanceintervalsontheNarrowRangeRTDsandWideRangeRTDs,respectively.Tables3Cand3DlisttheresultsofthedriftextrapolationcalculationsforNarrowRangeRTDsandWideRangeRTDs,respectively.ThedatapresentedintheMarch5,1989,columninTables3Cand3DshowthatalltemperaturedeviationsfortheNRandWRRTDsarewithinthemaximumalloweddeviation.Thisissignificantsincethetimeperiodbetweensurveillanceswasapproximately33months,orsevenmonthsgreaterthanthecurrentextensionthatwearerequesting.Intheothertwosurveillanceintervals,thereareafewextrapolateddriftdatapointswithvaluesoutsideourmaximumalloweddeviation.WebelievethesedatapointstobeinsignificantbecausetheRTDsareinherentlystableandourapplicationoflinearextrapolationtoestimatedriftisconservative,asfollows.Asmentionedbefore,thedriftmeasuredoverthe33monthintervalhadnotemperaturedeviationsexceedingourmaximumalloweddeviations.Sincethatintervalwasgreaterthantheintervalwearerequesting(26months),wedidnothavetoextrapolateanydatatoestimatethedrift.Also,comparisonofthemeasureddatafromJune1986toJune1992showsthatoverthesixyearintervalthemaximum"drift"fortheNRRTDswas1.08'F(RTD2-TE-421Bat250'F)andfortheWRRTDswas5.60'F(RTD2-TE-413Bat527'F),whichiswellwithinthemaximumalloweddeviation.ThisisanacceptablecomparisonsincethedatathatisbeingcomparedisdirectlyofftheRTDsandcannotbeadjustedfromonecycletothenext.Thus,basedonthe33monthintervalandasixyearintervalweshowthattheRTDsarestableandlinearextrapolationofthedataisconservative.Anotherfactorwhichwebelievecontributedtothefewextrapolateddriftdatapointsexceedingthemaximumalloweddeviationswasdifferencesintheindividuallooptemperatures.ThisisveryapparentuponexaminationoftheWRRTDsat350'Fand250'FduringOctober1990,wheretheindividualloopshavedeviationsofsimilarmagnitudesbutinoppositedirections.AlloftheextrapolateddriftdatapointswhichwereoutsidethemaximumalloweddeviationwereaffectedbytheOctober.1990data.Notethatthemeasureddeviationswereallwithinthemaximumalloweddeviationforthatsurveillance.
1lIIL
~l(p(I'IAttachment1toAEP:NRC:1181CPage3Finally,thestabilityoftheRTDsisevidentinthatoverthethreesurveillanceintervals,alloftheRTDsat527'F(closesttooperatingtemperature)hadanextrapolateddriftlessthanthemaximumalloweddeviation.Basedontheresultsofthisanalysis,webelievethatthedriftassociatedwiththeNarrowRangeandWideRangeRTDswillremainwithinourmaximumalloweddeviationandwillnotadverselyimpactthesafeoperationoftheplant.RVLISCalibrationWecannotprovideanydriftdataonRVLZSsincethetransmitterswerereplacedduringthemostrecent,refuelingoutageaspartofits10yearrecommendedreplacementfrequency.Evenwithoutthedriftdata,webelievethatwewouldbeawareofexcessivedriftthroughtheT/Srequiredmonthlychannelchecksperformedonthetwoindependenttrainsofindication.
Attachment1toAEP:NFIC:1181CTable1Page4PRESSURIZERWATERLEVELDRIFTSeekinganExtensiononlyforNLP-153(SetIII)MaximumAllowed%SanErrorandTechnicalSecificatonTriSetointBasedonWCAP13801,Table3-8MaximumAllowed%SpanError=+5.27%,-3.27%TechnicalSpecificationTripSetpoint=92%ofInstrumentSpanSurveillanceIntervalExtrapolationFactor(SIEF)Instr8NLP-151(N-4)07/01/86CalibrationDateExtensionDate(N)(N-3)(N-2)(N-1)09/03/8808/24/9004/21/9208/13/94SIEF(N-3)(N-2)1.06161.1722(N-1)1.3927NLP-152NLP-15307/01/8607/01/8609/03/8809/01/8808/24/9004/21/9208/13/9408/22/9004/20/9208/13/941.06161.17221.06561.17361.39271.3921ExamIe:SIEFcalculationforNLP-153inAril92SIEF(N-1)=[N-(N-1)]/[(N-1)-(N-2)]=[08/13/94-04/20/92]/[04/20/92-8/22/90]=1.3921CalculationofExtraolated%SanErrorE=(SensorDrift)x(SIEF)+RackErrora0.515where:SensorDrift=(AsFound-AsLeA)/(Span)Span=0.4VDCRackError=MeasuredRackErrora0.515=a[0.5(MaxAllowedSensorM8TE)+0.015(ActualRackM&TE)]a0.515MBTEerrorisaddedin"like-sign"directionforeachextrapolationMeasuredRackErrorsInstr.0NLP-151NLP-15209/8808/90-0.125-0.100-0.050-0.05004/92-0.0500.000Note:AtpowermonthlychannelfunctionaltestingperformedonRacksasassumedbyWCAP13801.TheabovedataistreatedinaccordancewiththeWCAPinaconservativefashion.CalculationofMarintoTSTriSetointM:E(92)=[E(100)-E(75)]x[92-75]/[100-75]+E(75)ExcessMarginto-3.27%:M=E(92)-(4.27%)ExcessMarglnto+5.27%:M=5.27%-E(92)where:E(P)=%SpanErrorat%Span(P) 1IEIAttachment1toAEP:NRC:1181CPage5Table1APressurizerWaterLevelMeasuredDataNLP-151Nominal09/03/8808/24/9004/21/92Scalep25%inputH2VDG2350.10003120.2203AsFoundAsLeft0.11310.10100.23220.2200AsFound0.09800.2158AsLeftAsFoundAsLeft0.10120.09530.10120.21910.21530.21995p3890.34060.35190.33950.33500.33920.33560.339975%100%100%75%50%25%p4680.46404910.50000.22033122350.10004910.50004680.46403890.34060.47600.46360.51230.49990.51250.50000.47590.46360.35190.33990.23210.22010.11310.10090.45880.49560.49500.45880.33500.21580.09800.46350.45940.46390.49970.49540.50020.49970.49500.49980.46360.45820.46310.33950.33450.33920.21900.21440.21940.10120.09540.1006ScalepNominalInputH2244NLP-15209/03/8808/24/90AsLeft0.1001VDCAsFoundAsLeft*AsFound0.10000.10910.10100.104404/21/92AsFoundAsLeft0.30120.100025%5p75%100%100%75%50%25%p3083724365005004363723082440.20000.20760.22020.22220.30000.30600.34030.34130.40000.40580.46470.46370.50000.50600.50100.50070.50000.50600.50130.50070.40000.40590.46460.46380.30000.30630.34000.34130.20000.20770.22020.22220.10000.10900.10120.10440.21950.33960.46370.49940.49970.46380.33960.21940.10010.41880.21930.53810.34010.66260.46480.69880.50180.69880.50180.66240.46510.53820.34010.41880.21930.30110.1000NominalScaleInputH2VDCNLP-15309/01/8808/22/90AsFoundAsLeftAsFoundAsLeft04/20/92AsLeftAsFoundp25%50%75%100%100%2353123894684914910.10000.22030.34060.46400.50000.50000.10690.22100.34090.46640.50330.50340.10030.08580.10020.21980.20680.21900.34030.32900.33910.46480.45580.46300.50060.49270.50030.50100.49270.50080.03410.13710.25590.37930.41530.41540.10020.22010.34020.46490.50130.50084683895p25%-3120.46400.34060.22030.46770.35400.23130.46490.45580.46400.34050.32900.33420.21980.20680.21900.37900.25500.13580.46420.34010.21900%2350.10000.10590.10040.08580.10020.03410.1009*Seefollowingpageforcomments-
'sI~~Attachment1toAEP:NRC:1181CPage6Table1A(continued)PressurizerWaterLevelMeasuredDataNLP-152CalibrationDataChange09/03/88OriginalCalibrationData09/03/88CalibrationDataChange2440%30825%5p37275%-436ScaleInputH2VDCAsFoundAsLeft0.10000.10910.10100.20000.20760.20000.30000.30600.29940.40000.40580.4001Scale0%30%GQ%91%3210.2203398034064770.4640InputH2VDC2440.1000AsLeft0.10100.22020.34030.46471PQ%100%75%50%25%0%5005004363723082440.50000.50600.50100.50000.50600.50130.40000.40590.40020.30000.30630.29960.20000.20770.20010.10000.10900.1012100%100%91%60%30%0%5000.50005000.50004770.46403980.34063210.22032440.10000.50100.50130.46460.34000.22020.1012AftertheSep88calibration,thenominalVDCcalibrationpointforNLP-152waschangedtomatchthatofNLP-151andNLP-153forhumanfactorsreasons.Thus,the"asleft"datafromtheSep88calibration,whichwasmeasuredattheoriginalinputwaterlevels,neededtobeadjustedtothenewinputwaterlevelstomakeitcomparabletotheAug90calibrationdata.Thiswasaccomplishedbylinearlyinterpolatingonthe"asleft"datafromSep88forthenewcalibrationinputwaterlevels.Thisprovided"asleft"datafromSep88whichcouldbecomparedtothe"asfound"datafromAug90.
IilI~IAttachment1toAEP:NRC:1181CPage7Table1BPressurizerWaterLevelExtrapolated%SpanErrorNLP-151Scale09/03/880%3.28%25o/o29850%2.82%75%3.00%100%3.07%100%3.12%75%2.97%50%2.82%25%2.95%0%3.28%SensorDrift08/24/9004/21/92-0.75%-1.48%-105%-095%-1.13%-090%-1.20%-1.03%-1.08%-1.07%-1.25%-1.18%-1.2Pyo-1.35%-1.22%-1.25%1.08%-1.15%-0.73%-1.45%Extraolated%S09/03/8808/24/903.87%-1.49%355%-1.85%339%193%357%-2.02%365%188%3.71%-2.08%3.55%-2.02%3.39%<<2.05%3.52%-1.88%387%146anError04/21/92262'g-1.82%199%2.0622P2.45%2.31%2.17%2.58%SanError92%TriSetointMarInto-3.27%192%TriSetointMarinto+5.27%92%TriSetoint363%-192%6.90%1.35%1.64%7.19%-2.04%1.23%731%SensorDriftNLP-152Extraolated%SanErrorScale0%25%5p75%1pp%100%5p09/03/8808/24/90228%085%1.90%0.50%1.50%0.25%1.45%-0.26%150%-007%150%-015%1.47%-0.21%1.58%0.32%04/21/9209/03/885028%28849.83%2.48%49.63%2.06%49.73%2.00%49.85%2.06%4978%20649.65%2.03%4965%2.14%08/24/9004/21/921.46%105%0.76%0.87%-065%P74-P.810.84%25%p1.93%0.50%2.25%0.80%49.85%2.51%50.25%2.85%%SanErrorI92%TriSetoint2.04%Marinto-3.27%I92%TriSetoint5.31%Marinto+5.27%92%TriSetoint3.23%105%1.40%-0.72%2.55%5ggxxx=Resultsnotconsideredforanalysis.Discussionatendofattachment.
Attachment1toAEP:NRC:1181CPage8Table1B(continued)PressurizerWaterLevelExtrapolated%SpanErrorNLP-153SensorDriftExtraolated%SanErrorScalep25%50%75%100%100%75%50%25%p09/01/8808/22/9004/20/92173%-363%-1653P.18%-3.25%-2Q.48%PP7%-2.82%-2P.8P%0.60%-2.25%-20.93%0.82%-198%2125P.85%-2.P7%-21.35%0.92%-2.28%-21.25%335%288%-198Q%2.75%-3.25%-2P.8P%148%"365%1653%09/01/882.10%-0.58%-P69%0.90%1.14%1.17%1.25%3.83%3.20%1.84%08/22/9004/20/92-5.04%-4.60%-4.11%'3.43%-3.11%323%3.46%-4.16%-460%5.07%'XX%SanError92%TriSetointMarinto-3.27%@92%TriSetointMarinto+5.27%92%TriSetoint1.07%4.34%4.20%-3.21%pp6%8.48%xxx=Resultsnotconsideredforanalysis.Discussionatendofattachment.
1,~pI~IAttachment1toAEP:NRC:1181CPage9Table2PRESSURIZERPRESSUREDRIFTSeekinganExtensiononlyforNPP-153(SetIII)andNPS-153(SetIV)MaximumAllowed%SanErrorandTechnicalSecificationTriSetpintsBasedonWCAP13801,Table3-7MaximumAllowed%SpanError=a3.25%TechnicalSpecificationTripSetpoint(High)=2385psi=85.625%ofInstrumentSpanTechnicalSpecificationTripSetpoints(Low)=1950psi=31.25%ofInstrumentSpanSurveillanceIntervalExtrapolationFactor(SIEF)Instr¹CalibrationDate(N-4)(N-3)(N-2)(N-1)ExtensionDate(N)(N-3)SIEF(N-2)(N-1)NPP-153NPS-15307/01/8607/26/8808/23/9004/22/9207/01/8607/25/8808/23/9004/23/9208/13/941.115108/13/941.11521.11211.38651.10941.3826Examle:SIEFcalculationforNPP-153inAril92SIEF(N-1)=[N-(N-1)]/[(N-1)-(N-2)]=[08/13/94-04/22/92]/[04/22/92-08/23/90]=1.3865CalculationofExtraplated%SanErrorE:E=(SensorDrift)x(SIEF)+RackErrora0.25%where:SensorDrift=(AsFound-AsLeft)/(Span)Span=0.4VDCRackError=MeasuredRackErrort0.25=(MaxAllowedSensor&RackM8TEByProcedure)t0.25MBTEerrorisaddedinconservativedirectionforeachextrapolationInstr407/88NPP-153-0.475NPS-1530.07508/9004/92-0.250-0.2500.2000.150MeasuredRackErrorsNote:AtpowermonthlychannelfunctionaltestingperformedonRacksasassumedbyWCAP13801.TheabovedataistreatedinaccordancewiththeWCAPinaconservativefashion.CalculationofMarintoTSTriSetointM:E(85.625)=[E(100)-E(75)]x[85.625-75]/[100-75]+E(75)E(31.25)=[E(25)-E(50)]x[25-31.25]/[25-50]+E(50)Marginto-3.25%:M=E(P)-(-3.25%)Marginto+3.25%:M=3.25%-E(P)where:E(P)=%SpanErrorat%Span(P) t'IeIIIAttachment1toAEP:NRC:1181CPage10Table2APressurizerPressureMeasuredDataScalepNominal17260.1InputPSIVDCNPP-15307/26/88AsFoundAsLeft0.10530.098808/23/90AsFoundAsLeft0.10120.099004/22/92AsFound0.099925%5p75%100%100%75%50%25%p1926212623262526252623262126192617260.20.30.40.50.50.40.30.20.10.20540.19880.30560.29920.40680.40000.50650.50000.50650.50030.40680.40030.30560.29940.20540.19870.10530.09840.20220.19950.30280.30030.40340.40090.50380.50030.50430.50150.40340.40040.30310.29960.20200.19900.10160.09890.20400.30390.40260.50180.50180.40220.30260.20230.1014Scale0%17260.1NominalInputPSIVDCNPS-15307/25/88AsFoundAsLeft0.10660.100508/23/90AsLeft0.0998AsFound0.100004/23/92AsFound0.097325%50%75%100%100%75%50%25%0%1926212623262526252623262126192617260.20.30.40.50.50.40.30.20.10.20680.20660.30710.30050.40860.40120.50880.50100.50920.50100.40960.40100.30840.30000.20780.20030.10810.09980.20040.30080.40180.50230.50250.40200.30100.20080.10090.20050.30110.40100.50100.50180.40100.29990.19990.10000.19800.29830.39940.49960.49960.39970.29900.19850.0983 C~~IAttachment1toAEP:NRC:1181CPage11Table2BPressurizerPressureExtrapolated%SpanErrorNPP-153SensorDriftExtrapolated%SpanErrorScale07/26/8808/23/9004/22/9207/26/8808/23/9004/22/920%1.33%060%023%1.25%0.67%0.31%25%1.35%50%140%75%1.70%100%1.62%085%112%0.90%090%0.85%0.43%0.95%0.38%1.28%0.95%1.34%1.00%167%095%1.59%1.06%1.56%1.25%059%0.52%100%75%5p1.62%170%140%1.00%0.08%0.77%0.45%0.92%0.75%159%1.11%1.67%0.86%1.34%1.03%-0.40%0.62%1.04%25%1.35%0.83%0.82%'l.28%0.92%1.14%p133%0.80%0.63%%SpanError31.25%TriSetpoint%SpanError@85.625%TripSetpointMarinto-3.25%I31.25%TriSetMarinto+3.25%I31.25%TriSet.Marinto-3.25%I85.625%TriSetMarinto+3.25%85.625%TriSet.125%089%1.29%095%164%099%454%420%1.96%2.30%4.89%4.24%1.61%2.26%087%1.12%p56%4.37%213%3.81%2.69NPS-153SensorDriftExtrapolated%SpanErrorScale07/25/880%165%25%1.70%50%1.78%75%2.15%100%2.20%08/23/9004/23/92-0.13%-0.63%1.55%-0.63%0.08%-0.70%015%-040%0.32%-0.35%07/25/8808/23/902.17%0.31%222%-177%2.30%0.53%272%062%2.78%0.81%04/23/92-096%-0.96%-1.07%-065%-P58100%2.30%0.37%-0.55%2.89%087%-086%5p2,1P195%25%0%2.03%75%2.40%025%-033%0.25%-0.23%0.13%-0.35%028%-043%3.00%073%2.67%073%2.50%0.59%258%0.76%p55-0.41%058%-0.69%%SpanError31.25%TripSetoint%SpanError@85.625%TripSetpointMarinto-3.25%@31.25%TriSet.Marinto+3.25%Q31.25%TriSet.Marinto-3.25%I85.625%TriSetMarinto+3.25%85.625%TriSet.2.54%0.62%2.75%0.70%5.79%3.87%0.71%2.63%6.00%395%050%255%-P54%062%271%3.79%263%3.87%
Attachment1toAEP:NRC:1181CPage12Table3NARROWRANGEandWIDERANGERTDDRIFTMaximumAllowed'FDeviationProcedureAccetanceCriteria:NarrowRange:k1.2'FWideRange:a8.4FSurveillanceIntervalExtrapolationFactor(SIEF)TempCalInt(N-2)N-4(N-3)(N-1)ensionDate(N)(N-3)SIEF(N-2)(N-1)527'F06/21/8603/05/8910/11/9006/08/92450'F06/20/8603/05/8910/09/9006/08/92350'F06/19/8602/28/8910/07/9006/08/92250'F06/18/8602/28/8910/06/9006/06/9208/13/9408/13/9408/13/9408/13/940.80571.36070.80491.36540.80811.35840.80931.36411.31351.30921.30491.3103Examle:SIEFcalculationfor527'FinJune92SIEF(N-1)=[N-(N-1)]/[(N-1)-(N-2)]=[08/13/94-06/08/92]/[06/08/92-10/11/90]=1.3135ExcetiontoSIEFN-3Jun86toFeb/Mar89:SinceSIEF(N-3)isapproximately0.8,avalueof1.0wasconservativelyusedinthedriftextrapolations.InotheNvords,theintervalbetweenthemeasureddata(33months)isgreaterthantheextendedintervalbeingrequested(26months).CalculationofExtraplatedDrift:ExtrapolatedDrift=[RTD(n)-RTD(n-1)]xSIEF(n)where:RTD(n)=measureddeviationduringsurveillance(n)RTD(n-1)=measureddeviationduringsurveillance(n-1)[previousintewal]
CIIAttachment1toAEP:NRC:1181CPage13Table3ANarrowRangeRTDsMeasuredData('FDeviationfromAverageRCSTemperature)527'F450'FRTD¹06/21/8603/05/8910/11/9006/08/9206/20/8603/05/8910/09/9006/08/922-TE-410A-0.040.24-0.150.000.09-0.16-0.070.032-TE-410B2-TE-411A-0.01-0.020.230.130.04-0.08-0.16-0.14-0.230.130.07-0.15-0.07-0.021.05-0.092-TE-411B0.12-0.40-0.05-0.04-0.200.27-0.96-0.042-TE-420A2-TE-420B2-TE-421A2-TE-421B-0.12-0.180.040.010.150.030.200.140.030.130.390.03-0.01-0.01-0.12-0.07-0.06-0.180.220.010.010.150.010.060.030.410.110.08-0.10-0.010.060.102-TE-430A0.140.200.01-0.11-0.01-0.140.01-0.062-TE-430B-0.120.000.05-0.04-0.14-0.050.01-0.132-TE-431A-0.050.260.05-0.160.05-0.220.02-0.182-TE-431B-0.010.07-0.100.00-0.07-0.07-0.14-0.022-TE-440A2-TE-440B2-TE-441A0.00-0.37-0.08-0.010.04-0.26-0.060.040.100.120.100.13-0.010.14-0.060.270.020.020.040.060.030.000.870.012-TE-441B0.06-0.380.05-0.04-0.040.33-0.96-0.14RTD¹2-TE-410A2-TE-410B0.020.010.18-0.21-0.030.81350'F06/19/8602/28/8910/07/90-0.10-0.0606/08/9206/18/860.080.110.09-0.270.000.84250'F02/28/8910/06/9006/06/920.14-0.082-TE-411A2-TE-411B2-TE-420A0.110.15-0.110.02-0.11-0.72-0.010.200.070.10-0.040.40-0.010.020.25-0.11-0.270.280.02-0.440.000.08-0.030.282-TE-420B-0.030.070.060.08-0.210.05-0.040.032-TEC21A2-TE-421B2-TER30A-0.120.12-0.040.05-0.090.10-0.11-0.04-0.010.050.080.09-1.060.010.10-0.050.13-0.11-0.030.24-0.110.110.020.022-TE-430B-0.11-0.100.03-0.18-0.21-0.10-0.07-0.312-TE-431A2-TE-431B-0.090.09-0.02-0.090.00-0.110.26-0.11-0.22-0.210.03-0.08-0.11-0.11-0.07-0.282-TE-440A-0.01-0.070.010.040.370.04-0.020.072-TE-440B2-TE-441A2-TE-44180.07-0.020.63,-0.06-0.02-0.030.040.15-0.67-0.01-0.01-0.140.030.280.160.050.710.09.-0.06-0.520.000.01-0.010.01 7PaI~gAttachment1toAEP:NRC:1181CPage14Table3BWideRangeRTDsMeasuredData('FDeviationfromAverageRCSTemperature)RTD¹527'F06/21/8603/05/8910/11/9006/08/9206/20/86450'F03/05/8910/09/9006/08/922-TE-413A2-TEP13B0.28-2.431.59-1.750.72-0.194.873.17-1.50-2.013.400.75-0.241.32-0.132-TE423A2-TE-423B2-TE<33A2-TE-433B0.94-0.58-0.090.34-0.430.820.21-0.03-0.19-0.49-0.12-0.15-4.43-3.973.433.12-1.100.07-0.17-0.63-0.820.03-0.31-0.670.01-0.36-0.11-0.250.24-0.420.50-0.212-TE-443A0.90-0.050.66-3.12-0.81-0.390.36-0.352-TE-443B-0.670.95-0.21-3.870.700.78-0.17-0.94350'F250'FRTD¹06/19/862-TE-413A1.2502/28/89-2AO10/07/90-4.700.050.9806/08/9206/18/86-4.39-1.4502/28/8910/06/9006/06/921.642-TE-413B-3.803.95-6.34-1.29-4.133.27-6.12-0.392-TE-423A2-TE-423B2-TE-433A0.900.340.33-0.700.06-0.436.026.04-6.321.01-0.571.241.130.610.38-0.53-0.04-0.815.885.69-6.220.07-0.510.712-TE-433B1.20-1.12-6.73-1.341.15-1.23-6.55-0.482-TE-443A2-TE-443B0.54-0.78-0.280.926.095.94-1.140.420.880.61-0.441.225.875.86-0.26-0.77 fllt,I Attachment1toAEP:NRC:1181CPage15Table3CNarrowRangeRTDsExtrapolatedDrift('FDeviationfromAverageRCSTemperature)RTD¹2-TE-410A527'F0.20-0.530.2803/05/8910/11/9006/08/9203/05/89-0.25450F10/09/9006/08/920.120.132-TE-41082-TE-411A0.15-0.290.24-0.26-0.26-0.08-0.36-0.221.75-1.490.18-0.072-TE-4118-0.520.480.010.47-1.681.202-TE-420A2-TE-42082-TE-421A-0.20-0.120.16-0.010.190.160.47-0.130.070.050.070.19-0.040.14-0.150.50-0.040.122-TE-4218-0.06-0.200.00-0.07-0.120.052-TE-430A=2-TE-43082-TE-431A0.06-0.26-0.290.310.120.07-0.16-0.12-0.28-0.130.09-0.270.20-0.090.08-0.180.33-0.262-TE-43180.08-0.230.130.00-0.100.162-TE-440A2-TE-44082-TE-441A-0.370.640.040.210.410.11-0.300.07-0.070.28-0.120.08-0.311.16-0.030.03-1.130.042-TE-4418-0.440.59-0.120.37-1.761.07MaxDeviationMinDeviationMarginto+1.2'F0.560.890.310.64-0.52-0.530.47-0.280.730.47-0.360.73-1.76-0.55-1.490.001.751.20Marginto-1.2'F0.680.670.920.84-0.56-0.29RTD¹2-TE-410A2-TE-41082-TE-411A2-TE-41182-TE-420A02/28/89-0.01-0.39-0.22-0.160.31350'F10/07/90-0.051.390.18-0.97-0.180.00-0.360.89-0.370.290.4306/08/9202/28/890.14-0.02-1.14-0.17-0.120.181.52-1.200.180.08-0.23-0.380.540.37250'F10/06/9006/06/922-TE-42080.10-0.010.030.26-0.120.092-TE<21A0.24-0.220.120.05'-0.250.212-TE-4218-0.190.190.051.03-0.110.172-TE-430A2-TE-43082-TE-431A2-TE-43182-TE-440A2-TE-44080.070.01-0.070.18-0.06-0.090.040.180.12-0.270.110.880.03-0.28-0.14-0.140.04-0.840.140.11-0.230.10-0.330.02-0.480.170.04-0.31-0.150.010.00-0.220.12-0.080.90-0.922-TE-441A0.10-0.100.03-0.19-0.200.072-TE-4418MaxDeviationMinDeviation0.170.31-0.39-1.121.39-1.120.70-0.160.891.03-1.14-0.370.69-0.710.691.52-0.71-1.20Marginto+1.2'FMarginto-1.2'F0.890.81-0.190.080.310.060.170.83-0.320.490.510.00 Attachment1toAEP:NRC:1181CPage16Table3DWideRangeRTDsExtrapolatedDrift('FDeviationfromAverageRCSTemperature)RTD¹2-TE-413A527'F3.36-3.3403/05/8910/11/9006/08/9203/05/895.45-0.51450'F10/09/9006/08/923.770.752-TE-413B2-TE-423A0.33-1.372.71-0.644.41-5.57-0.040.280.14-4.971.130.302-TE<23B1.40-1.78-4.57-0.04-0.53-0.082-TE-433A0.30-0.454.66-0.140.270.802-TE-433B-0.37-0.164.30-0.040.570.052-TE-443A2-TE-443BMaxDeviation-0.950.971.62-1.582.713.360.08-4.815.450.42P.970.421.02-0.93-1.01-1.303.770.80MinDeviation-3.34-'1.78-5.57-0.51-4.97-1.01Marginto+8.4'FMarginto-8.4F5.695.065.046.622.952.837.987.897.604.633.437.39RTD¹350'F02/28/8910/07/90250'F06/08/9202/28/8910/06/9006/06/922-TE-413A-3.65-3.126.20-2.43-4.017.902-TE-413B2-TE-423A2-TE-423B-1.60-0.289.138.127.75-13.986.59-6.24-7.09-1.66-0.428.?47.827.40-12.817.51-7.61-8.122-TE-433A-0.76-8.007.50-1.82-7.389.082-TE-43382-TE-443A2-TE-443B-2.32-0.821.70-7.628.656.827.03-6.80-7.20-2.38-1.052.36-7.268.616.337.95-8.03-8.69MaxDeviation7.759.137.507.408.749.08MinDeviationMarginto+8.4'FMarginto-8.4'F-3.65-13.980.65-0.734.75-5.58-7.200.901.201.005.97-0.34-4.41-2.43-12.81-8.69-0.68-0.29 Attachment1toAEP:NRC:1181CPage17DiscussionofNLP-152andNLP-153Aril1992SurveillanceDataDuringtheUnit21992refuelingcalibration,twopressurizerleveltransmitters,NLP-152andNLP-153,werefoundwithzeroshifts.NLP-152,theprotectionsetIItransmitterexhibiteda+50%spanzeroshift,andNLP-153,theprotectionsetZZZtransmittershowedanapproximate-20%spanzeroshift.Thereasonforthelargezeroshiftsonthetransmitterswasneverdetermined.Thetransmitterswerenotdamaged,andwerecalibratedtonominalvalues.Itispostulatedthatonlyoneside'srootorinstrumentvalvesonthesensinglinestothetransmitterwereshut,orthatleak-byofarootvalvemayhaveallowedRCSpressureononesideoftheDPcell.Thisone-sidedpressureeffect,whichcouldhavebeenaspikeorappliedoverweekspriortothecalibrationispostulatedtohavecausedthelargezeroshifts.The"asfound"dataandcalculatedshiftareshowninTables1Aand1B.This"asfound"datadoesnotreflectthelastoperationalstateofthetransmitters.PastmeasureddriftdataindicatesthesetransmittersnormallydeviateI2%tof3%ofspanfromthe"asleft"valuesoverafuelcycle.Inaccordancewithtechnicalspecifications,thechannelsarecomparedatthepanelindicatoreveryshift.RandomlyselectedshiftlysurveillancedatatakenbyOperationsrevealsnogreaterthana1%deviationfromSeptember1,1991,toFebruary18,1992,justbeforetheUnit2shutdown.TheOperationsshiftlydataisshownbelowforvariousdates.Date09/01/9111/01/9112/01/9101/01/9202/08/92.02/15/9202/18/92Instr.NLP-151NLP-152NLP-153NLP-151NLP-152NLP-153NLP-151NLP-152NLP-153NLP-151NLP-152NLP-153NLP-151NLP-152NLP-153NLP-151NLP-152NLP-153NLP-151NLP-152NLP-153Shift1st2nd3rd51't51't50%51%51%50%50%50%49%52't52't52%52%52%52%51't51%51't52%52%52't52't52%52't52%51%52't52%52%52't52%52%52%51't51%51%42%42%42't42%42%42't42%42%42%42%42%42't42%42't42%42%42%42%42%42%42%42%42%42%42%42%42%
Attachment1toAEP:NRC:1181CPage18Thepanelindicationisanisolatedcurrentloop.Theisolatorandtheindicatordrifterrorswerecomparedoverthelastthree'cyclestodiscerntherelativestabilityandmagnitudeof.errors,associatedwiththesecomponents.Theerrorsaresummedtoprovideworst-casevaluesandareshownbelow.Alldriftvaluesin%Spanforthevalues25'4,50%,75%,75%,50%,25%arefromthepastcalibrations.NLP-1519/88Calibration8/90Calibration4/92CalibrationScaleI/ILZSumLZSumLISum25%50%75%75't50%25%-0.100-0.075-0'50-0.050-0.075-0.100+0.050-0.025+0.1000.000-0.375-0.100-0.050-0.100+0.050-0.050-0.425-0.200-0.025-0.025-0.025.-0.025-0.025-0.0200.000-0.025-0.125-0.125-0.1250.000-0.025-0.050-0.150-0.150-0.150-0.025-0.375-0.425-0.450-0.450-0.425-0.3750.0000.000-0.400-0.4000.0000.000-0.375-0.425-0.850-0.850-0.425-0.375NLP-1529/88Calibration8/90Calibration4/92CalibrationScaleI/I25%+0.05050%+0.07575%+0.05075%+0'5050%+0.07525%+0.050LI0.0000.0000.0000.0000.0000.000Sum+0.050+0.075+0.050+0.050+0.075+0.050+0.0500.0000F0000.0000.000+0.050LZ+0.625+0.125-0.150-0.150+0.125+0.625Sum+0.675+0.125-0.150-0.150+0.125+0.675+0.075+0.050+0.050+0.050+0.050+0.075LI0.0000.0000.0000.0000.0000.000Sum+0.075+0.050+0.050+0050+0.050+0.075NLP-1539/88Calibration8/90Calibration4/92CalibrationScaleI/ZLZSumLZSumLISum25%+0.05050%+0.07575%+0.05075%+0.05050%+0.07525%+0.050-0.225-0.575-1.125-1.125-0.625-0.300-0.175-0.500-1.075-1.075-0.550-0.250+0.100+0.100+0.100+0.100+0.100+0.100-0.100-0.325-0.850-0.850-0.325-0.2500.000-0.225-0.750-0750-0.225-0.150-0.175-0.150-0.150-0.150-0.150-0.175+0.450+0.475-0.500-0.375+0.250+0.325+0.275+0.325~-0.650-0.525-0.400+0.150 Attachment1toAEPsNRC:1181CPage19Comparingthe"asfound"errordatabetweenthethreepanelindicatorsattheapproximatelevelfornormaloperation,50%,thegreatestdeviationwas0.75%yhichwasbetweenNLP-151andNLP-153..TheindicatorerrorforNLP-152wasvirtuallyzeroat+0.05%.Thus,theactualcalibrationdifferencebetweenthethreeleveltransmittersmusthavebeenverysmall.Toverifythisstatement,arealisticscenariowasderivedtodeterminethetransmittererrorsassuming:NLP-151=NLP-152=NLP-153=42%Atthetwo50%level(pressureappliedinanincreasing,thendecreaseingfashion)readings,theerrorsareasfollowss,NLP-151NLP-151NLP-152NLP-152NLP-153NLP-153transmittererrors:indicatorerrors:transmittererrors:indicatorerrors:transmittererrors:indicatorerrors:-0.900%-0.425%unknown+0.050%unknown+0.325%-1.250%-0.425%unknown+0.050%unknown-0.400%(fromTable1B)(fromabove)(fromabove)(fromabove)NLP-151totallooperrorstotheindicator:>>1.325%-1.675%(transmitter+indicator)ThusthetransmittererrorsforNLP-152andNLP-153canbesolvedasfollows:NLP-152transmittererror=(NLP-151totalerror)>>(NLP-152indicatorerror)~-1.325%-(+0.050%)=-1.375%,and-1.675%-(+0.050%)~-1.725%NLP-153transmittererrorI(NLP-151totalerror)-(NLP-153indicatorerror)=-1.325%-(+0.325%)=-1.650%,and-1'75't-(-0.400't)~-1.275%.Therefore,itisreadilyapparentthatthemeasuretransmittererrorsof+50%onNLP-152and-20%onNLP-153arenotattributabletodriftandthedatashouldbediscardedforthedriftanalysis.
Attachment2toAEP:NRC:1181CUpdatetoAEP:NRC:1181Reasonsand10CFR50.92SignificantHazardsEvaluationsforChangestotheTechnicalSpecificationsforDonaldC.CookNuclearPl'antUnit2 Attachment2toAEP:NRC:1181CPage1UPDATETOAEP:NRC:1181SurveillanceextensionreestswhichmaberemovedfromAEP:NRC:1181TheextensionfortheintermediaterangedetectorcalibrationandP-6interlockfunctionaltesting(Group11,T/Ss4'111,Table4'lgI'tern5and4'11')isnolongerneededsincethesurveillancewassatisfactorilycompletedduringtheforcedoutageonAugust10,1993.(ReplaceT/Spage3/43-11fromAEP:NRC:1181submittalwithnewproposedpage3/43-11.)Theextensionforthereactorcoolantflowcalibration(Group15,T/Ss4.2.5.2and4.3.1.1.1,Table4.3-1,Items12613)isnotneededsincethetransmitterswerecalibratedduringOctoberandNovember1992.ThefirsttransmitterscalibrationisdueAugust17,1994,aftertherequestedextensiondate.Theremainderofthechannelcanbecalibratedatpower.(ReplaceT/Spage3/43-11[sameasabove)anddeleteT/Spages3/42-15and3/43-12fromAEPsNRC:1181submittal.)Theextensionforcontainmentwaterlevelcalibration(Group14,T/S4.3.3.6,Table4.3-10,Item18)isnolongerneeded.Ithasbeendeterminedthatthiscalibrationcanbeperformedwithoutentryintolowercontainment,therefore,wecanperformitpriortotherefuelingoutage.(ReplaceT/Spage3/43-47fromAEP:NRC:1181submittalwithnewproposedpage3/43-47.)SurveillanceextensionreestswhichneedaddedtoAEP:NRC:1181IthasrecentlybeendeterminedthatthreeT/Ssurveillanceswereomittedfromouroriginalsubmittal(AEP:NRC:1181datedApril16,1993)concerningoperationofUnit2longerthancertainT/Ssurveillancesallow.ThesurveillanceswhichneedintervalextensionsmaybeaddedtoexistinggroupsofT/SsassetforthinAEP:NRC:1181asfollows:~GrauTSAffectedDescritionofChaneDueDate(4)4.3.2.1.1,Table4.3-2,Items8.a6S.bDelaycalibrationsoftime02/05/94delayrelaysfor4Kvbuslimitinglossof/degradedvoltageduedate(5)4)Table4.3-10,Item15Delaycalibrationsofincorethermocouplesinmode304/28/94(14)4.4.6.1.bDelaycalibrationofcontainmentflowmonitoringsystem04/03/94Theremainderofthisattachmentcontainsthereasonstheintervalextensionsarebeingrequested,)ustlficationsfortheextensions,andthesignificanthazardsconsideration.
g~)f Attachment2toAEP:NRC:1181CPage244KvLossofVoltaeandDeradedVoltaeTimeDelaRelasT/S4.3.2.1.1,Table4.3-2,Items8.aand.S.brequirethatthesetimedelayrelaysbecalibratedevery18months.Thissurveillanceshouldnotbeperformedatpowerbecausethecomponentsinvolved(agastats)cannotbeisolatedfromtheirnormalpowersupply.Performanceofthesurveillancecouldcauseapowertransferwhichwouldresultinachallengetosafetyrelatedcomponents.Also,sincethesurveillancewouldbeperformedon"live"equipment,personnelsafetyisatrisk.ThisextensionisneedfromFebruary5,1994,untiltheUnit2refuelingoutage.(ReplaceT/Spage3/43-32fromAEP:NRC:1181submittalwithnewproposedpage3/43-32.)Thetimedelayrelaysinvolvedinthissurveillanceareelectronicandwereinstalledin1986.Electronicagastatsarehighlyreliable,accurateandrepeatable.Thereliablity,accuracyandrepeatablityofthetimedelayrelaysweredemonstratedduringthepreviousthreechannelcalibrationsurveillanceswherenoadjustmentswererequiredontheasfoundconditions.Basedontheabove,thereisnoreasontobelievethatduringtheextensionperiodthesetimedelayrelayswouldnotperformtheirintendedsafetyfunctionasrequired.10CFR50.92CriteriaPer10CFR50.92,aproposedamendmentwillnotinvolveasignificanthazardsconsiderationiftheproposedamendmentdoesnot:(1)involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyanalyzed,(2)createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyanalyzedorevaluated,or(3)involveasignificantreductioninamarginofsafety.Ourevaluationoftheproposedchangewithrespecttothesecriteriaisprovidedbelow.Criterion1Ourlastthreesetsofsurveillancedataonthetimedelayrelaysshowthattheyareveryreliable,accurateandrepeatable.Sincetheyareelectronicrelays,thereisnoreasontobelievethattheywoulddriftoutsidetheiracceptablesetpoints.Thus,webelievethattheywouldperformtheirintendedfunction(s)duringtheextensionperiod.Forthesereasons,webelievetheextensionwearerequestingwillnotresultinasignificantincreaseintheprobabilityorconsequencesofapreviouslyevaluatedaccident,norwillitresultinasignificantreductioninamarginofsafety.
Attachment2toAEP:NRC:1181CPage3Criterion2~Thisextensionwi,llnotresultinachangeinplantconfigurationoroperation.Therefore,theextensionshouldnotcreatethepossibilityofanewordifferentkindofaccidentfromanypreviouslyevaluatedoranalyzed.Criterion3SeeCriterion1,above.Lastly,wenotethattheCommissionhasprovidedguidanceconcerning.thedeterminationofsignificanthazardsbyprovidingcertainexamples(48FR14870)ofamendmentsconsiderednotlikelytoinvolvesignificanthazardsconsideration.Thesixthoftheseexamplesreferstochangeswhichmayresultinsomeincreasetotheprobabilityorconsecpencesofapreviouslyevaluatedaccident,buttheresultsofwhicharewithinlimitsestablishedasacceptable.Webelievethischangefallswithinthescopeofthisexample,forthereasonscitedabove.Thus,webelievethischangedoesnotinvolveasignificanthazardsconsiderationasdefinedin10CFR50.92.
$~'I Attachment2toAEP:NRC:1181CPage45IncoreThermocoulesCoreExitThermocoulesT/S4.3.3.6,Table4.3-10,Item15requiresthatachannelcalibrationbeperformedevery18months.Footnote(1)tothisT/SrequiresthatapartialrangechannelcalibrationforthesensorbeperformedbelowP-12inmode3.Thissurveillancecannotbeperformedduringreactoroperationsinceitrequirestheunittobeinmode3.ThisextensionisneededfromApril28,1994,untiltheUnit2refuelingoutage.(ReplaceT/Spage3/43-47fromAEP:NRC:1181submittalwithnewproposedpage3/43-47.Samepagereplacementastheoneremovingtheextensionrequestforcontainmentwaterlevelsurveillance.)T/S3'.3.6,Post-AccidentInstrumentation,requiresaminimumof2coreexitthermocouplespercorequadrant.Datafrom58incorethermocouples,whicharedistributedthroughoutthecoreinvariouscorelocations(13inQuadrantI,16inQuadrantII,17inQuadrantIIIand12inQuadrantIV),werereviewedforthisanalysis.Duringreactoroperationthecoreexitthermocouplesarerequiredtobechannelcheckedonamonthlybases.Weadministrativelyperformthechannelcheckweekly.ThissurveillanceconfirmsthatcoreexitthermocoupleshavenotchangedsignificantlyfromtheaveragereadingandverifiesT/Scompliance.Ifasignificantchangeisnotedtheassociatedthermocoupleisdeclaredinoperable.Thissurveillancewouldcontinuetobeperformedduringtheextensionperiodandifnecessary,appropriateT/Sactionstakenbasedontheresultsofthesurveillance.Areviewhasbeenperformedonthiscycle'sandtheprevioustwocycle'scoreexitthermocoupledata.Thepurposeofthereviewwastodetermineifasignificantdriftcharacteristicwasinherenttothecoreexittherocoupleswhichcouldleadtoseveralcoreexitthermocouplesbecominginoperablepriortothescheduledrefuelingoutage.Essentialy,nothermocoupledriftwasobserved,thusweexpectthatcompliancewithT/S3.3.3.6(2thermocouples/corequadrant)willbeassuredthroughouttherestofthescheduledcycleoperation.Basedontheabove,webelieveextensionofthecoreexitthermocouplechannelcalibrationwillnotadverselyimpacttheabilityofthisequipmenttoperformitssafetyfunction.10CFR50.92CriteriaPer10CFR50.92,aproposedamendmentwillnotinvolveasignificanthazardsconsiderationiftheproposedamendmentdoesnot:(1)involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyanalyzed,(2)createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyanalyzedorevaluated,or(3)involveasignificantreductioninamarginofsafety.
4Vl~~
Attachment2toAEP:NRC:1181CPage5Ourevaluationoftheproposedchangewithrespecttothesecriteriaisprovidedbelow.Criterion1Reviewofourlastthreecycle'ssurveillancedataindicatedthatdriftofthethermocouplesisnotextpected.Also,weadministrativelyperformtheT/Srequiredmonthlychannelcheckonaweeklybasis.Thischannelcheckwouldprovideadequateindicationifasignificantnumberofthermocouplesneededtobedeclaredinoperable,thusallowingustotakethecorrectiveactionsnecessarytoensureT/Scompliance.Therefore,webelievethattheincorethermocoupleswillbecapableofperformingtheirintendedfunctionduringtheextensionperiod.Forthesereasons,webelievetheextensionwearerequestingwillnotresultinasignificantincreaseintheprobabilityorconsequencesofapreviouslyevaluatedaccident,norwillitresultinasignificantreductioninamarginofsafety.Criterion2Thisextensionwillnotresultinachangeinplantconfigurationoroperation.Therefore,theextensionshouldnotcreatethepossibilityofanewordifferentkindofaccidentfromanypreviouslyevaluatedoranalyzed.Criterion3SeeCriterion1,above.Lastly,wenotethattheCommissionhasprovidedguidanceconcerningthedeterminationofsignificanthazardsbyprovidingcertainexamples(48FR14870)ofamendmentsconsiderednotlikelytoinvolvesignificanthazardsconsideration.Thesixthoftheseexamplesreferstochangeswhichmayresultinsomeincreasetotheprobabilityorconsequencesofapreviouslyevaluatedaccident,buttheresultsofwhicharewithinlimitsestablishedasacceptable.Webelievethischangefallswithinthescopeofthisexample,forthereasonscitedabove.Thus,webelievethischangedoesnotinvolveasignificanthazardsconsiderationasdefinedin10CFR50.92.
I Attachment2toAEP:NRC:1181CPage614ContainmentFlowMonitorinSstem'/S4.4.6.1.brequiresthatthecontainmentsumpflowmonitoringsystembecalibratedevery18months.Thissurveillancecannotbeperformedduringreactoroperationsinceitrequiresentryintothelowervolumeofcontainment.ThisextensionisneededfromApril3,1994,untiltheUnit2refuelingoutage.(AddnewproposedT/Spage3/44-14toAEP:NRC:1181submittal.)ThecontainmentflowmonitoringsystemisusedtomonitoranddetectRCSleakage.Byknowingthesumppumpcapacities(flowrates)andhowlongapumpruns,theleakageratecanbemonitoredandestimated.Thepasttwosurveillancesshowthatthemeasuredpumpflowrateshavebeenwellabovetheiracceptancecriteriaasdisplayedbelow:~PumFlowRate(GPM)Acceptance1992Surveillance1990SurveillanceCriteriaReactorCavity2-PP-0593A56.2153.722ReactorCavity2-PP-0593B50.9848.722LowerContainment2-PP-0382A140.75167.3>45LowerContainment2-PP-0382B166.21164.0>45PipeTunnel2-PP-0612A56.3653.2>45PipeTunnel2-PP-0612B57.2243.657.3(retest)>45Theretestonthepipetunnelpump(2-PP-0612B)wassuccessfulfollowingremovalofforiegnmaterialwhichenteredthesumpandpumpinletstrainersduringtheoutage.Zfapumpweretodegrade,theflowratewoulddecreasegthusincreasingtheruntimeforthepumptodeliveragivenamountofwater.ThiswouldleadtoanoverestimationofRCSleakage,whichisconservativeinrespecttotheT/Ss.Thepipetunnelsumppumptypicallyrunsaminuteperday,andthereactorcavityandlowercontainmentpumpsrunlessfrequently.Basedontheexcellentsurveillancehistoryofthepumpsandtheminimalamountofruntimeaccumulatedonthepumps,thereisnoreasontobelievethatcontinuedoperationduringtheextensionperiodwouldcausethepumpstobecomeinoperable.
I'I'IJ C~~i+'Attachment2toAEP:NRC:1181CPage710CFR50.92CriteriaPer10CFR50.92,aproposed.amendmentwillnotinvolveasignificanthazardsconsiderationiftheproposedamendmentdoesnot:(1)involveasignificantincreaseintheprobabilityorconsequencesofanaccident,previouslyanalyzed,(2)createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyanalyzedorevaluated,or(3)involveasignificantreductioninamarginofsafety.Ourevaluationoftheproposedchangewithrespecttothesecriteriaisprovidedbelow.Criterion1Ourpastsurveillancehistoryonthecontainmentflowmonitoringsystemhasshownthepumpstohavecapacitieswellaboveouracceptancecriteria.Duringthecurrentcycle,thereactorcavity,lowercontainment,andpipetunnelsumppumpshaverunforaminimalamountoftime.Thus,thepotentialforpumpdegradationissmall.Therefore,thereisnoreasontobelievethatthecontainmentflowmonitoringsystemwouldnotperformitsintendedfunctionduringtheextensionperiod.Forthesereasons,webelievetheextensionwearerequestingwillnotresultinasignificantincreaseintheprobabilityorconsequencesofapreviouslyevaluatedaccident,norwillitresultinasignificantreductioninamarginofsafety.Criterion2Thisextensionwillnotresultinachangeinplantconfigurationoroperation.Therefore,theextensionshouldnotcreatethepossibilityofanewordifferentkindofaccidentfromanypreviouslyevaluatedoranalyzed.ICriterion3SeeCriterion1,above.Lastly,wenotethattheCommissionhasprovidedguidanceconcerningthedeterminationofsignificanthazardsbyprovidingcertainexamples(48FR14870)ofamendmentsconsiderednotlikelytoinvolvesignificanthazardsconsideration.Thesixthoftheseexamplesreferstochangeswhichmayresultinsomeincreasetotheprobabilityorconsequencesofapreviouslyevaluatedaccident,buttheresultsofwhicharewithinlimitsestablishedasacceptable.Webelievethischangefallswithinthescopeofthisexample,forthereasonscitedabove'.Thus,webelievethischangedoesnotinvolveasignificanthazardsconsiderationasdefinedin10CFR50.92.
Attachment3toAEP:NRC:1181CExistingTechni.calSpecificationsforDonaldC.CookNuclearPlantUnit2MarkedtoReflecttheProposedChanges