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{{#Wiki_filter:ACCELERATEDDIK+BUTIONDEMONSTR+OAISYFI'EM~~REGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR-8901120447DOC.DATE:88/12/30'OTARIZED:NODOCKETFACIL:50-315DonaldC.CookNuclearPowerPlant,Unit1,Indiana&05000315AUTH.NAMEAUTHORAFFILIATIONALEXICH,M.P.IndianaMichiganPowerCo.(formerlyIndiana&MichiganEleRECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk)
{{#Wiki_filter:ACCELERATED DIK+BUTION DEMONSTR+OAI SYFI'EM~~REGULATORY INFORMATION DISTRIBUTION SYSTEM(RIDS)ACCESSION NBR-8901120447 DOC.DATE:
88/12/30'OTARIZED:
NODOCKETFACIL:50-315 DonaldC.CookNuclearPowerPlant,Unit1,Indiana&05000315AUTH.NAMEAUTHORAFFILIATION ALEXICH,M.P.
IndianaMichiganPowerCo.(formerly Indiana&MichiganEleRECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk)


==SUBJECT:==
==SUBJECT:==
ApplicationforamendtoLicenseDPR-58,modifyingTechSpec4.1.1.5remintempforcriticality.DISTRIBUTIONCODE:AOOIDCOPIESRECEIVED:LTRJENCLQSIZE:7~TITLE:ORSubmittal:GeneralDistributionNOTES:RECIPIENTIDCODE/NAMEPD3-1LASTANG,JINTERNAL:ARM/DAF/LFMBNRR/DEST/CEB8HNRR/DEST/MTB9HNRR/DEST/SICBNRR/PMAS/ILRB12OGC/HDS1RES/DSIR/EIBEXTERNAL:LPDRNSICCOPIESLTTRENCL1011101.11111111011111.1RECIPIENTIDCODE/NAMEPD3-1PDNRR/DEST/ADS7ENRR/DEST/ESB8DNRR/DEST/RSB8ENRR/DOEA/TSB11NUDOC-BSTRACTGFg01NRCPDRCOPIESLTTRENCL2211111111111111NOTE'roALL"RIDS"RECIPXZmS.(/dcgg/<~~2.9(~g~hDSPZZASEHELPUSK)REDUCEWIPE!CGHIACZ'%HEDOCUME&#xc3;ZCONTROLDESKiROOMP1-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRZKITIONLISTSFORDOCGKBTZSYOUDGNiTNEED!TOTALNUMBEROFCOPIESREQUIRED:LTTR20ENCL17 IndianaMichiganPowerCompanyP.O.Box16631Columbus,OH43216IMEHANllNlCMGANROMEOAEP:NRC:1067A10CFR50.90DonaldC.CookNuclearPlantUnit1DocketNo.50-315llLicenseNo.DPR-58SUPPLEMENTALTECHNICALSPECIFICATIONCHANGESFORREDUCEDTEMPERATUREANDPRESSUREPROGRAMU.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,D.C.20555Attn:T.E.MurleyDecember30,1988
Application foramendtoLicenseDPR-58,modifying TechSpec4.1.1.5remintempforcriticality.
DISTRIBUTION CODE:AOOIDCOPIESRECEIVED:LTR JENCLQSIZE:7~TITLE:ORSubmittal:
GeneralDistribution NOTES:RECIPIENT IDCODE/NAME PD3-1LASTANG,JINTERNAL:
ARM/DAF/LFMB NRR/DEST/CEB 8HNRR/DEST/MTB 9HNRR/DEST/SICB NRR/PMAS/ILRB12 OGC/HDS1RES/DSIR/EIB EXTERNAL:
LPDRNSICCOPIESLTTRENCL1011101.11111111011111.1RECIPIENT IDCODE/NAME PD3-1PDNRR/DEST/ADS 7ENRR/DEST/ESB 8DNRR/DEST/RSB 8ENRR/DOEA/TSB 11NUDOC-BSTRACTGFg01NRCPDRCOPIESLTTRENCL2211111111111111NOTE'roALL"RIDS"RECIPXZmS.
(/dcgg/<~~2.9(~g~hDSPZZASEHELPUSK)REDUCEWIPE!CGHIACZ'%HEDOCUME&#xc3;ZCONTROLDESKiROOMP1-37(EXT.20079)TOELIMINATE YOURNAMEFROMDISTRZKITION LISTSFORDOCGKBTZS YOUDGNiTNEED!TOTALNUMBEROFCOPIESREQUIRED:
LTTR20ENCL17 IndianaMichiganPowerCompanyP.O.Box16631Columbus, OH43216IMEHANllNlCMGANROMEOAEP:NRC:1067A 10CFR50.90DonaldC.CookNuclearPlantUnit1DocketNo.50-315llLicenseNo.DPR-58SUPPLEMENTAL TECHNICAL SPECIFICATION CHANGESFORREDUCEDTEMPERATURE ANDPRESSUREPROGRAMU.S.NuclearRegulatory Commission Attn:DocumentControlDeskWashington, D.C.20555Attn:T.E.MurleyDecember30,1988


==DearDr.Hurley:==
==DearDr.Hurley:==
ThisletteranditsattachmentsconstituteanapplicationforamendmenttotheTechnicalSpecifications(T/Ss)fortheDonaldC.CookNuclearPlantUnit1.Specifically,weareproposingtomodifyT/S4.1.1.5(MinimumTemperatureforCriticality)suchthatthetemperaturebelowwhichthereactorcoolantsystemaveragetemperaturemustbemonitoredevery30minutesisreducedfrom551Fto545F.ThechangeisdesiredsinceweplantooperatetheupcomingUnit1Cycle11atreducedtemperatureandpressure(RTP)conditions.TheRTPprogramsupportsarangeofnominalfullpowerTavgfrom547Fto567.8F.TheexpectedfullpowerTavgforCyclellis0approximately550F,reducedfromthepresent(non-RTP)fullpower0Tavgof567.8F.PlantoperationwiththepresentT/SisnotprecludedundertheRTPconditions;however,theT/SdoesplaceaburdenontheplantoperatorssinceTavgwillhavetobemonitoredevery30minutesatessentiallyalltimeswhenthereactoriscritical.ThislettersupplementsourletterAEP:NRC:1067,datedOctober14,1988.ThatlettertransmittedtheanalysesthatsupportRTPoperation,aswellastheT/Schangesnecessarytoallowplantoperation.WerequestthatyourreviewofthisrequestbecompletedbyApril15,1989,whichisthesamedaterequestedinAEP:NRC:1067forapprovaloftheRTPanalysesandassociatedT/Schanges.pic'lpDRADQCK05OOoP'g,eel:4i~~Ios%~
Thisletteranditsattachments constitute anapplication foramendment totheTechnical Specifications (T/Ss)fortheDonaldC.CookNuclearPlantUnit1.Specifically, weareproposing tomodifyT/S4.1.1.5(MinimumTemperature forCriticality) suchthatthetemperature belowwhichthereactorcoolantsystemaveragetemperature mustbemonitored every30minutesisreducedfrom551Fto545F.ThechangeisdesiredsinceweplantooperatetheupcomingUnit1Cycle11atreducedtemperature andpressure(RTP)conditions.
Dr.T.E.Hurley-2-AEP:NRC:1067AAdditionaldetailsaboutthechangeandourevaluationconcerningsignificanthazardsconsiderationarecontainedinAttachment1tothisletter.TheproposedrevisedT/SchangeisfoundinAttachment2.Webelievethattheproposedchangeswillnotresultin(1)asignificantchangeinthetypesofeffluentsorasignificantincreaseintheamountsofanyeffluentthat,maybereleasedoffsite,or(2)asignificantincreaseinindividualorcumulativeoccupationalradiationexposure.TheseproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommittee,andwillbereviewedbytheNuclearSafetyandDesignReviewCommitteeattheirnextregularlyscheduledmeeting.Incompliancewiththerequirementsof10CFR50.91(b)(1),copiesofthisletteranditsattachmentshavebeentransmittedtoMr.R.C.CallenoftheMichiganPublicServiceCommission,andMr.GeorgeBruchmannoftheMichiganDepartmentofPublicHealth.Pursuanttotherequirementsof10CFR170'2(c),wehaveenclosedanapplicationfeeof$150.00fortheproposedamendments.ThisdocumenthasbeenpreparedfollowingCorporateproceduresthatincorporateareasonablesetofcontrolstoensureitsaccuracyandcompletenesspriortosignaturebytheundersigned.Sincerely,M.P.AlexichVicePresidentMPA/ehAttachmentscc:D.H.Williams,Jr.W.G.Smith,Jr.-BridgmanR.C.'allenG.CharnoffG.BruchmannA.B.Davis-RegionIIINRCResidentInspector-Bridgman ATTACHMENT1TOAEP:NRC:1067ADESCRIPTIONAND10CFR50.92SIGNIFICANTHAZARDSEVALUATIONFORCHANGESTOTHETECHNICALSPECIFICATIONSFORTHEDONALDC.COOKNUCLEARPLANTUNIT1  
TheRTPprogramsupportsarangeofnominalfullpowerTavgfrom547Fto567.8F.TheexpectedfullpowerTavgforCyclellis0approximately 550F,reducedfromthepresent(non-RTP) fullpower0Tavgof567.8F.Plantoperation withthepresentT/Sisnotprecluded undertheRTPconditions; however,theT/Sdoesplaceaburdenontheplantoperators sinceTavgwillhavetobemonitored every30minutesatessentially alltimeswhenthereactoriscritical.
Thislettersupplements ourletterAEP:NRC:1067, datedOctober14,1988.Thatlettertransmitted theanalysesthatsupportRTPoperation, aswellastheT/Schangesnecessary toallowplantoperation.
Werequestthatyourreviewofthisrequestbecompleted byApril15,1989,whichisthesamedaterequested inAEP:NRC:1067 forapprovaloftheRTPanalysesandassociated T/Schanges.pic'lpDRADQCK05OOoP'g,eel:4i~~Ios%~
Dr.T.E.Hurley-2-AEP:NRC:1067A Additional detailsaboutthechangeandourevaluation concerning significant hazardsconsideration arecontained inAttachment 1tothisletter.TheproposedrevisedT/SchangeisfoundinAttachment 2.Webelievethattheproposedchangeswillnotresultin(1)asignificant changeinthetypesofeffluents orasignificant increaseintheamountsofanyeffluentthat,maybereleasedoffsite,or(2)asignificant increaseinindividual orcumulative occupational radiation exposure.
TheseproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommittee, andwillbereviewedbytheNuclearSafetyandDesignReviewCommittee attheirnextregularly scheduled meeting.Incompliance withtherequirements of10CFR50.91(b)(1),
copiesofthisletteranditsattachments havebeentransmitted toMr.R.C.CallenoftheMichiganPublicServiceCommission, andMr.GeorgeBruchmann oftheMichiganDepartment ofPublicHealth.Pursuanttotherequirements of10CFR170'2(c),wehaveenclosedanapplication feeof$150.00fortheproposedamendments.
Thisdocumenthasbeenpreparedfollowing Corporate procedures thatincorporate areasonable setofcontrolstoensureitsaccuracyandcompleteness priortosignature bytheundersigned.
Sincerely, M.P.AlexichVicePresident MPA/ehAttachments cc:D.H.Williams, Jr.W.G.Smith,Jr.-BridgmanR.C.'allenG.CharnoffG.Bruchmann A.B.Davis-RegionIIINRCResidentInspector
-Bridgman ATTACHMENT 1TOAEP:NRC:1067A DESCRIPTION AND10CFR50.92SIGNIFICANT HAZARDSEVALUATION FORCHANGESTOTHETECHNICAL SPECIFICATIONS FORTHEDONALDC.COOKNUCLEARPLANTUNIT1  


ATTACHMENT1TOAEP:NRC:1067APage1DescritionofChaneUnit1TechnicalSpecification(T/S)4.1.1.5.b(MinimumTemperatureforCriticality)aspresentlywrittenrequiresverificationthatthereactorcoolantsystemTavgis>541Fatleastonceper30minuteswhenthereactoriscriticalandTavgislessthan551F.WeareproposingtorevisetherequirementsuchthatTavgmustbeverifiedevery30minuteswhenTavgisbelow/(545ForwhenthelowTavgalarmisinoperable.0ReasonfortheChaneUnderpresentoperatingconditions,fullpowerTavgis567.8F.0FortheupcomingUnit1Cycle11,however,weareplanningtooperatetheplantunderreducedtemperatureandpressure(RTP)conditions.TheRTPprogramsupportsarangeofnominalfullpowerTavgfrom547Fto567.8F.ThefullpowerTavgwillbeloweredtoapproximately550FforUnit1Cyclell.Sincethis0isbelow551F,thepresentwordingofT/S4.1.1.5.bwouldrequirethatTavgbeverifiedtobeabove541F(theminimumtemperature0forcriticality)every30minutesessentiallyalltimeswhenthereactoriscritical.AlthoughthisdoesnotprecludeoperationunderRTPconditions,itisburdensomeandwilldistracttheoperatorsfromotherduties.ThisrequestsupplementsourletterAEP:NRC:1067,datedOctober14,1988.Thatlettertransmitted.theanalyseswhichsupportRTPoperation,aswellastheT/SchangesthatarenecessaryinordertoimplementtheRTPprogram.JustificationforChaneTheproposedchangedoesnotaltertheminimumtemperatureforcriticality.Tavgmustbemaintainedabove541Fanytimethereactoriscritical.ShouldTavgdropbelow541F,theactionstatementforT/S3.1.1.5requiresthatTavgberestoredabove0541Fwithin15minutesortheunitmustbeplacedinhotstandby.T/S4.1.1,5.bpresentlyrequiresTavgtobedeterminedevery30minuteswhenTavgislessthan10Fabove541F.This10FvalueisconsistentwiththelatestrevisionofWestinghouseStandardT/Ss.Westinghousehasinformedusthe10Fwasestablishedtoprotectagainstencroachmentuponthe541Fminimumtemperature0forcriticality.The10Fvalueisnotderivedfromanyanalysis.0TheplantisequippedwithalowTavgalarmthatiscurrentlyset0at554F.ThelowTavgalarmisderivedfromthebistablesthatclosethemainfeedwatercontrolvalvesonlowTavgcoincidentwithareactortrip.Thisfunctionhelpsprotectthereactorfromexcessivecooldownfollowingareactortrip.Diversityofsignals
ATTACHMENT 1TOAEP:NRC:1067A Page1DescritionofChaneUnit1Technical Specification (T/S)4.1.1.5.b (MinimumTemperature forCriticality) aspresently writtenrequiresverification thatthereactorcoolantsystemTavgis>541Fatleastonceper30minuteswhenthereactoriscriticalandTavgislessthan551F.Weareproposing torevisetherequirement suchthatTavgmustbeverifiedevery30minuteswhenTavgisbelow/(545ForwhenthelowTavgalarmisinoperable.
0ReasonfortheChaneUnderpresentoperating conditions, fullpowerTavgis567.8F.0FortheupcomingUnit1Cycle11,however,weareplanningtooperatetheplantunderreducedtemperature andpressure(RTP)conditions.
TheRTPprogramsupportsarangeofnominalfullpowerTavgfrom547Fto567.8F.ThefullpowerTavgwillbeloweredtoapproximately 550FforUnit1Cyclell.Sincethis0isbelow551F,thepresentwordingofT/S4.1.1.5.b wouldrequirethatTavgbeverifiedtobeabove541F(theminimumtemperature 0forcriticality) every30minutesessentially alltimeswhenthereactoriscritical.
Althoughthisdoesnotprecludeoperation underRTPconditions, itisburdensome andwilldistracttheoperators fromotherduties.Thisrequestsupplements ourletterAEP:NRC:1067, datedOctober14,1988.Thatlettertransmitted.
theanalyseswhichsupportRTPoperation, aswellastheT/Schangesthatarenecessary inordertoimplement theRTPprogram.Justification forChaneTheproposedchangedoesnotaltertheminimumtemperature forcriticality.
Tavgmustbemaintained above541Fanytimethereactoriscritical.
ShouldTavgdropbelow541F,theactionstatement forT/S3.1.1.5requiresthatTavgberestoredabove0541Fwithin15minutesortheunitmustbeplacedinhotstandby.T/S4.1.1,5.b presently requiresTavgtobedetermined every30minuteswhenTavgislessthan10Fabove541F.This10Fvalueisconsistent withthelatestrevisionofWestinghouse StandardT/Ss.Westinghouse hasinformedusthe10Fwasestablished toprotectagainstencroachment uponthe541Fminimumtemperature 0forcriticality.
The10Fvalueisnotderivedfromanyanalysis.
0TheplantisequippedwithalowTavgalarmthatiscurrently set0at554F.ThelowTavgalarmisderivedfromthebistables thatclosethemainfeedwater controlvalvesonlowTavgcoincident withareactortrip.Thisfunctionhelpsprotectthereactorfromexcessive cooldownfollowing areactortrip.Diversity ofsignals
~~
~~
ATTACHMENT1TOAEP'NRC'1067APage2forterminatingmainfeedwaterisprovidedviatheP-4permissive,whichtripsthemainfeedwaterpumpsintheeventofareactortrip.ThefunctionsassociatedwiththelowTavgbistableandthemainfeedwaterpumptriponreactortriparenotdelineatedintheT/Ss.WeareproposingtolowerthelowTavgsetpoint(includingthealarm)from554Fto545F.Thetemperatureof545Fis00sufficientlybelowtheoperatingtemperaturetolessenthepossibilityofunnecessary.=alarms,butishighenoughtoprovidetheoperatorwithamplewarningthatTavgisapproachingthe541F0minimumtemperatureforcriticality.LoweringthelowTavgsetpointhasminimaleffectontheresponseoftheplanttoreactortripbecause,asdiscussedabove,themainfeedpumps(MFP)aretrippeddirectlyonareactortrip,viatheP-4permissive.TheFSARLOCAandtransientanalysesdonottakecreditforfeedwaterisolationderivedfromthe'lowTavgbistable.ThefunctionismodeledintheWestinghouseOwnersGroupanalysisofsteamlinebreakmassandenergyreleasesoutsidecontainment(WCAP10961),becauseitisconservativetodoso.Modelingofthefunctionisconservativebecauseitleadstoearlierfeedwaterisolationthantheother(T/S)signalsthatalsoprovidefeedwaterisolation.Earlyterminationoffeedwaterresultsingreatersteamgeneratortubeuncovery,andthusmoresuperheatingofthesteamexitingthebreak.LoweringthelowTavgsetpointisconservativewithrespecttothisanalysis,sinceitwillsomewhatdelaythefeedwaterisolation.WeproposethattheoperatoronlyberequiredtomonitoranddocumentTavgona30-minutebasisifTavgisbelowtheproposedlowTavgsetpointof545F,orifthelowTavgalarmis0inoperable.ThiswillavoidtheburdenthatmonitoringTavgevery30minutesplacesontheoperators,andwillhelpensuretheoperators'ttentionisnotdivertedfrommoreimportantsafetyfunctions.Tavgwillcontinuetobemeasuredatleastonceper12hoursinMode1,asrequiredbyT/S3.2.5(DNBParameters).TheresettingoftheTavgalarmto545FwillensuretheoperatoriswarnedthatTavgisencroachinguponthe541Fminimumtemperature0forcriticality.10CFR50.92EvaluationPer10CFR50.92,aproposedamendmentwillnotinvolveasignificanthazardsconsiderationiftheproposedamendmentdoesnot:
ATTACHMENT 1TOAEP'NRC'1067A Page2forterminating mainfeedwater isprovidedviatheP-4permissive, whichtripsthemainfeedwater pumpsintheeventofareactortrip.Thefunctions associated withthelowTavgbistableandthemainfeedwater pumptriponreactortriparenotdelineated intheT/Ss.Weareproposing tolowerthelowTavgsetpoint(including thealarm)from554Fto545F.Thetemperature of545Fis00sufficiently belowtheoperating temperature tolessenthepossibility ofunnecessary.=alarms, butishighenoughtoprovidetheoperatorwithamplewarningthatTavgisapproaching the541F0minimumtemperature forcriticality.
ATTACHMENT1TOAEP:NRC:1067APage31)Involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyanalyzed,2)Createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyanalyzedorevaluated,or3)Involveasignificantreductioninamarginofsafety.Criterion1TheperiodicmonitoringanddocumentingofTavgwhentheplantisoperatedneartheminimumtemperatureforcriticalitywillbereduced.However,thischangewillbecompensatedforbyloweringthealarmsetpointtowarntheoperatorofapproachtotheminimumtemperatureforcriticality.Therefore,wedonotbelieveourproposalwillresultinanincreaseintheprobabilityorconsequencesofanaccidentpreviouslyanalyzed.Criterion2TheproposedT/Schangesdonotrevisetheminimumtemperatureforcriticalityof541FspecifiedinT/S3.1.1.5.ThechangeonlyimpactsthetemperatureatwhichTavgmustbemonitoredevery30minutes.Thiswillbecompensatedforbyprovidinganalarmata0Tavgof545Fthatwillwarntheoperatorthattheplantisapproachingtheminimumtemperatureatwhichitmayremaincritical.Thus,wedonotbelievethechangecanresultinanynewordifferentkindsofaccidentsfromanypreviouslyanalyzedorevaluated.Criterion3ThepurposeoftheT/SistoensurethereactorisnotcriticalwithTavgbelow541F,withoutappropriateactionbeingtaken.WewillensurethattheoperatoriswarnedthatTavgisapproachingthe541FlimitbyloweringthelowTavgalarmsetpointto545F.Webelievethiswillprovideadequateassurancethatthe541FTavglimitisprotected.Therefore,theproposedchangeshouldnotsignificantlyreducethemarginofsafety.Lastly,wenotethattheCommissionhasprovidedguidanceconcerningthedeterminationofsignificanthazardsbyprovidingexamples(48FR14870)ofamendmentsconsiderednotlikelytoinvolvesignificanthazardsconsideration.Thesixthoftheseexamplesreferstochangesthatmayresultinsome*increasetotheprobabilityorconsequencesofapreviouslyanalyzedaccident,buttheresultsofwhicharewithinlimitsestablishedasacceptable.Asdiscussedinthebases,theminimumtemperatureforcriticalityensuresthatthereactor,instrumentation,andvesselareoperatedintheiranalyzedtemperatureranges.Theserequirementsarenot IC ATTACHMENT1TOAEP:NRC:1067APage4affectedbyourproposedrevisiontothesurveillancerequirements.ThechangeonlyimpactsthetemperatureatwhichtheoperatormustmonitorTavgevery30minutestoensurethetemperaturedoesnotdropbelowtheminimumtemperatureforcriticality.MewillbeprovidinganalarmthatwillalerttheoperatorthatthetemperatureisapproachingitsminimumTavglimit.Therefore,webelievetheexamplecitedisapplicableandthatthechangesshouldnotinvolveasignificanthazardsconsideration.}}
LoweringthelowTavgsetpointhasminimaleffectontheresponseoftheplanttoreactortripbecause,asdiscussed above,themainfeedpumps (MFP)aretrippeddirectlyonareactortrip,viatheP-4permissive.
TheFSARLOCAandtransient analysesdonottakecreditforfeedwater isolation derivedfromthe'lowTavgbistable.
ThefunctionismodeledintheWestinghouse OwnersGroupanalysisofsteamline breakmassandenergyreleasesoutsidecontainment (WCAP10961),becauseitisconservative todoso.Modelingofthefunctionisconservative becauseitleadstoearlierfeedwater isolation thantheother(T/S)signalsthatalsoprovidefeedwater isolation.
Earlytermination offeedwater resultsingreatersteamgenerator tubeuncovery, andthusmoresuperheating ofthesteamexitingthebreak.LoweringthelowTavgsetpointisconservative withrespecttothisanalysis, sinceitwillsomewhatdelaythefeedwater isolation.
WeproposethattheoperatoronlyberequiredtomonitoranddocumentTavgona30-minute basisifTavgisbelowtheproposedlowTavgsetpointof545F,orifthelowTavgalarmis0inoperable.
Thiswillavoidtheburdenthatmonitoring Tavgevery30minutesplacesontheoperators, andwillhelpensuretheoperators'ttention isnotdivertedfrommoreimportant safetyfunctions.
Tavgwillcontinuetobemeasuredatleastonceper12hoursinMode1,asrequiredbyT/S3.2.5(DNBParameters).
Theresetting oftheTavgalarmto545FwillensuretheoperatoriswarnedthatTavgisencroaching uponthe541Fminimumtemperature 0forcriticality.
10CFR50.92Evaluation Per10CFR50.92,aproposedamendment willnotinvolveasignificant hazardsconsideration iftheproposedamendment doesnot:
ATTACHMENT 1TOAEP:NRC:1067A Page31)Involveasignificant increaseintheprobability orconsequences ofanaccidentpreviously
: analyzed, 2)Createthepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously analyzedorevaluated, or3)Involveasignificant reduction inamarginofsafety.Criterion 1Theperiodicmonitoring anddocumenting ofTavgwhentheplantisoperatedneartheminimumtemperature forcriticality willbereduced.However,thischangewillbecompensated forbyloweringthealarmsetpointtowarntheoperatorofapproachtotheminimumtemperature forcriticality.
Therefore, wedonotbelieveourproposalwillresultinanincreaseintheprobability orconsequences ofanaccidentpreviously analyzed.
Criterion 2TheproposedT/Schangesdonotrevisetheminimumtemperature forcriticality of541Fspecified inT/S3.1.1.5.Thechangeonlyimpactsthetemperature atwhichTavgmustbemonitored every30minutes.Thiswillbecompensated forbyproviding analarmata0Tavgof545Fthatwillwarntheoperatorthattheplantisapproaching theminimumtemperature atwhichitmayremaincritical.
Thus,wedonotbelievethechangecanresultinanynewordifferent kindsofaccidents fromanypreviously analyzedorevaluated.
Criterion 3ThepurposeoftheT/SistoensurethereactorisnotcriticalwithTavgbelow541F,withoutappropriate actionbeingtaken.WewillensurethattheoperatoriswarnedthatTavgisapproaching the541FlimitbyloweringthelowTavgalarmsetpointto545F.Webelievethiswillprovideadequateassurance thatthe541FTavglimitisprotected.
Therefore, theproposedchangeshouldnotsignificantly reducethemarginofsafety.Lastly,wenotethattheCommission hasprovidedguidanceconcerning thedetermination ofsignificant hazardsbyproviding examples(48FR14870)ofamendments considered notlikelytoinvolvesignificant hazardsconsideration.
Thesixthoftheseexamplesreferstochangesthatmayresultinsome*increasetotheprobability orconsequences ofapreviously analyzedaccident, buttheresultsofwhicharewithinlimitsestablished asacceptable.
Asdiscussed inthebases,theminimumtemperature forcriticality ensuresthatthereactor,instrumentation, andvesselareoperatedintheiranalyzedtemperature ranges.Theserequirements arenot IC ATTACHMENT 1TOAEP:NRC:1067A Page4affectedbyourproposedrevisiontothesurveillance requirements.
Thechangeonlyimpactsthetemperature atwhichtheoperatormustmonitorTavgevery30minutestoensurethetemperature doesnotdropbelowtheminimumtemperature forcriticality.
Mewillbeproviding analarmthatwillalerttheoperatorthatthetemperature isapproaching itsminimumTavglimit.Therefore, webelievetheexamplecitedisapplicable andthatthechangesshouldnotinvolveasignificant hazardsconsideration.}}

Revision as of 07:27, 29 June 2018

Application for Amend to License DPR-58,modifying Tech Spec 4.1.1.5 Such That Temp Below Reactor Coolant Sys Average Temp Must Be Monitored Every 30 Minutes Reduced from 551 F to 545 F.Fee Paid
ML17334B286
Person / Time
Site: Cook American Electric Power icon.png
Issue date: 12/30/1988
From: ALEXICH M P
INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To: MURLEY T E
NRC, NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML17334B287 List:
References
AEP:NRC:1067A, NUDOCS 8901120447
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Text

ACCELERATED DIK+BUTION DEMONSTR+OAI SYFI'EM~~REGULATORY INFORMATION DISTRIBUTION SYSTEM(RIDS)ACCESSION NBR-8901120447 DOC.DATE:

88/12/30'OTARIZED:

NODOCKETFACIL:50-315 DonaldC.CookNuclearPowerPlant,Unit1,Indiana&05000315AUTH.NAMEAUTHORAFFILIATION ALEXICH,M.P.

IndianaMichiganPowerCo.(formerly Indiana&MichiganEleRECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk)

SUBJECT:

Application foramendtoLicenseDPR-58,modifying TechSpec4.1.1.5remintempforcriticality.

DISTRIBUTION CODE:AOOIDCOPIESRECEIVED:LTR JENCLQSIZE:7~TITLE:ORSubmittal:

GeneralDistribution NOTES:RECIPIENT IDCODE/NAME PD3-1LASTANG,JINTERNAL:

ARM/DAF/LFMB NRR/DEST/CEB 8HNRR/DEST/MTB 9HNRR/DEST/SICB NRR/PMAS/ILRB12 OGC/HDS1RES/DSIR/EIB EXTERNAL:

LPDRNSICCOPIESLTTRENCL1011101.11111111011111.1RECIPIENT IDCODE/NAME PD3-1PDNRR/DEST/ADS 7ENRR/DEST/ESB 8DNRR/DEST/RSB 8ENRR/DOEA/TSB 11NUDOC-BSTRACTGFg01NRCPDRCOPIESLTTRENCL2211111111111111NOTE'roALL"RIDS"RECIPXZmS.

(/dcgg/<~~2.9(~g~hDSPZZASEHELPUSK)REDUCEWIPE!CGHIACZ'%HEDOCUMEÃZCONTROLDESKiROOMP1-37(EXT.20079)TOELIMINATE YOURNAMEFROMDISTRZKITION LISTSFORDOCGKBTZS YOUDGNiTNEED!TOTALNUMBEROFCOPIESREQUIRED:

LTTR20ENCL17 IndianaMichiganPowerCompanyP.O.Box16631Columbus, OH43216IMEHANllNlCMGANROMEOAEP:NRC:1067A 10CFR50.90DonaldC.CookNuclearPlantUnit1DocketNo.50-315llLicenseNo.DPR-58SUPPLEMENTAL TECHNICAL SPECIFICATION CHANGESFORREDUCEDTEMPERATURE ANDPRESSUREPROGRAMU.S.NuclearRegulatory Commission Attn:DocumentControlDeskWashington, D.C.20555Attn:T.E.MurleyDecember30,1988

DearDr.Hurley:

Thisletteranditsattachments constitute anapplication foramendment totheTechnical Specifications (T/Ss)fortheDonaldC.CookNuclearPlantUnit1.Specifically, weareproposing tomodifyT/S4.1.1.5(MinimumTemperature forCriticality) suchthatthetemperature belowwhichthereactorcoolantsystemaveragetemperature mustbemonitored every30minutesisreducedfrom551Fto545F.ThechangeisdesiredsinceweplantooperatetheupcomingUnit1Cycle11atreducedtemperature andpressure(RTP)conditions.

TheRTPprogramsupportsarangeofnominalfullpowerTavgfrom547Fto567.8F.TheexpectedfullpowerTavgforCyclellis0approximately 550F,reducedfromthepresent(non-RTP) fullpower0Tavgof567.8F.Plantoperation withthepresentT/Sisnotprecluded undertheRTPconditions; however,theT/Sdoesplaceaburdenontheplantoperators sinceTavgwillhavetobemonitored every30minutesatessentially alltimeswhenthereactoriscritical.

Thislettersupplements ourletterAEP:NRC:1067, datedOctober14,1988.Thatlettertransmitted theanalysesthatsupportRTPoperation, aswellastheT/Schangesnecessary toallowplantoperation.

Werequestthatyourreviewofthisrequestbecompleted byApril15,1989,whichisthesamedaterequested inAEP:NRC:1067 forapprovaloftheRTPanalysesandassociated T/Schanges.pic'lpDRADQCK05OOoP'g,eel:4i~~Ios%~

Dr.T.E.Hurley-2-AEP:NRC:1067A Additional detailsaboutthechangeandourevaluation concerning significant hazardsconsideration arecontained inAttachment 1tothisletter.TheproposedrevisedT/SchangeisfoundinAttachment 2.Webelievethattheproposedchangeswillnotresultin(1)asignificant changeinthetypesofeffluents orasignificant increaseintheamountsofanyeffluentthat,maybereleasedoffsite,or(2)asignificant increaseinindividual orcumulative occupational radiation exposure.

TheseproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommittee, andwillbereviewedbytheNuclearSafetyandDesignReviewCommittee attheirnextregularly scheduled meeting.Incompliance withtherequirements of10CFR50.91(b)(1),

copiesofthisletteranditsattachments havebeentransmitted toMr.R.C.CallenoftheMichiganPublicServiceCommission, andMr.GeorgeBruchmann oftheMichiganDepartment ofPublicHealth.Pursuanttotherequirements of10CFR170'2(c),wehaveenclosedanapplication feeof$150.00fortheproposedamendments.

Thisdocumenthasbeenpreparedfollowing Corporate procedures thatincorporate areasonable setofcontrolstoensureitsaccuracyandcompleteness priortosignature bytheundersigned.

Sincerely, M.P.AlexichVicePresident MPA/ehAttachments cc:D.H.Williams, Jr.W.G.Smith,Jr.-BridgmanR.C.'allenG.CharnoffG.Bruchmann A.B.Davis-RegionIIINRCResidentInspector

-Bridgman ATTACHMENT 1TOAEP:NRC:1067A DESCRIPTION AND10CFR50.92SIGNIFICANT HAZARDSEVALUATION FORCHANGESTOTHETECHNICAL SPECIFICATIONS FORTHEDONALDC.COOKNUCLEARPLANTUNIT1

ATTACHMENT 1TOAEP:NRC:1067A Page1DescritionofChaneUnit1Technical Specification (T/S)4.1.1.5.b (MinimumTemperature forCriticality) aspresently writtenrequiresverification thatthereactorcoolantsystemTavgis>541Fatleastonceper30minuteswhenthereactoriscriticalandTavgislessthan551F.Weareproposing torevisetherequirement suchthatTavgmustbeverifiedevery30minuteswhenTavgisbelow/(545ForwhenthelowTavgalarmisinoperable.

0ReasonfortheChaneUnderpresentoperating conditions, fullpowerTavgis567.8F.0FortheupcomingUnit1Cycle11,however,weareplanningtooperatetheplantunderreducedtemperature andpressure(RTP)conditions.

TheRTPprogramsupportsarangeofnominalfullpowerTavgfrom547Fto567.8F.ThefullpowerTavgwillbeloweredtoapproximately 550FforUnit1Cyclell.Sincethis0isbelow551F,thepresentwordingofT/S4.1.1.5.b wouldrequirethatTavgbeverifiedtobeabove541F(theminimumtemperature 0forcriticality) every30minutesessentially alltimeswhenthereactoriscritical.

Althoughthisdoesnotprecludeoperation underRTPconditions, itisburdensome andwilldistracttheoperators fromotherduties.Thisrequestsupplements ourletterAEP:NRC:1067, datedOctober14,1988.Thatlettertransmitted.

theanalyseswhichsupportRTPoperation, aswellastheT/Schangesthatarenecessary inordertoimplement theRTPprogram.Justification forChaneTheproposedchangedoesnotaltertheminimumtemperature forcriticality.

Tavgmustbemaintained above541Fanytimethereactoriscritical.

ShouldTavgdropbelow541F,theactionstatement forT/S3.1.1.5requiresthatTavgberestoredabove0541Fwithin15minutesortheunitmustbeplacedinhotstandby.T/S4.1.1,5.b presently requiresTavgtobedetermined every30minuteswhenTavgislessthan10Fabove541F.This10Fvalueisconsistent withthelatestrevisionofWestinghouse StandardT/Ss.Westinghouse hasinformedusthe10Fwasestablished toprotectagainstencroachment uponthe541Fminimumtemperature 0forcriticality.

The10Fvalueisnotderivedfromanyanalysis.

0TheplantisequippedwithalowTavgalarmthatiscurrently set0at554F.ThelowTavgalarmisderivedfromthebistables thatclosethemainfeedwater controlvalvesonlowTavgcoincident withareactortrip.Thisfunctionhelpsprotectthereactorfromexcessive cooldownfollowing areactortrip.Diversity ofsignals

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ATTACHMENT 1TOAEP'NRC'1067A Page2forterminating mainfeedwater isprovidedviatheP-4permissive, whichtripsthemainfeedwater pumpsintheeventofareactortrip.Thefunctions associated withthelowTavgbistableandthemainfeedwater pumptriponreactortriparenotdelineated intheT/Ss.Weareproposing tolowerthelowTavgsetpoint(including thealarm)from554Fto545F.Thetemperature of545Fis00sufficiently belowtheoperating temperature tolessenthepossibility ofunnecessary.=alarms, butishighenoughtoprovidetheoperatorwithamplewarningthatTavgisapproaching the541F0minimumtemperature forcriticality.

LoweringthelowTavgsetpointhasminimaleffectontheresponseoftheplanttoreactortripbecause,asdiscussed above,themainfeedpumps (MFP)aretrippeddirectlyonareactortrip,viatheP-4permissive.

TheFSARLOCAandtransient analysesdonottakecreditforfeedwater isolation derivedfromthe'lowTavgbistable.

ThefunctionismodeledintheWestinghouse OwnersGroupanalysisofsteamline breakmassandenergyreleasesoutsidecontainment (WCAP10961),becauseitisconservative todoso.Modelingofthefunctionisconservative becauseitleadstoearlierfeedwater isolation thantheother(T/S)signalsthatalsoprovidefeedwater isolation.

Earlytermination offeedwater resultsingreatersteamgenerator tubeuncovery, andthusmoresuperheating ofthesteamexitingthebreak.LoweringthelowTavgsetpointisconservative withrespecttothisanalysis, sinceitwillsomewhatdelaythefeedwater isolation.

WeproposethattheoperatoronlyberequiredtomonitoranddocumentTavgona30-minute basisifTavgisbelowtheproposedlowTavgsetpointof545F,orifthelowTavgalarmis0inoperable.

Thiswillavoidtheburdenthatmonitoring Tavgevery30minutesplacesontheoperators, andwillhelpensuretheoperators'ttention isnotdivertedfrommoreimportant safetyfunctions.

Tavgwillcontinuetobemeasuredatleastonceper12hoursinMode1,asrequiredbyT/S3.2.5(DNBParameters).

Theresetting oftheTavgalarmto545FwillensuretheoperatoriswarnedthatTavgisencroaching uponthe541Fminimumtemperature 0forcriticality.

10CFR50.92Evaluation Per10CFR50.92,aproposedamendment willnotinvolveasignificant hazardsconsideration iftheproposedamendment doesnot:

ATTACHMENT 1TOAEP:NRC:1067A Page31)Involveasignificant increaseintheprobability orconsequences ofanaccidentpreviously

analyzed, 2)Createthepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously analyzedorevaluated, or3)Involveasignificant reduction inamarginofsafety.Criterion 1Theperiodicmonitoring anddocumenting ofTavgwhentheplantisoperatedneartheminimumtemperature forcriticality willbereduced.However,thischangewillbecompensated forbyloweringthealarmsetpointtowarntheoperatorofapproachtotheminimumtemperature forcriticality.

Therefore, wedonotbelieveourproposalwillresultinanincreaseintheprobability orconsequences ofanaccidentpreviously analyzed.

Criterion 2TheproposedT/Schangesdonotrevisetheminimumtemperature forcriticality of541Fspecified inT/S3.1.1.5.Thechangeonlyimpactsthetemperature atwhichTavgmustbemonitored every30minutes.Thiswillbecompensated forbyproviding analarmata0Tavgof545Fthatwillwarntheoperatorthattheplantisapproaching theminimumtemperature atwhichitmayremaincritical.

Thus,wedonotbelievethechangecanresultinanynewordifferent kindsofaccidents fromanypreviously analyzedorevaluated.

Criterion 3ThepurposeoftheT/SistoensurethereactorisnotcriticalwithTavgbelow541F,withoutappropriate actionbeingtaken.WewillensurethattheoperatoriswarnedthatTavgisapproaching the541FlimitbyloweringthelowTavgalarmsetpointto545F.Webelievethiswillprovideadequateassurance thatthe541FTavglimitisprotected.

Therefore, theproposedchangeshouldnotsignificantly reducethemarginofsafety.Lastly,wenotethattheCommission hasprovidedguidanceconcerning thedetermination ofsignificant hazardsbyproviding examples(48FR14870)ofamendments considered notlikelytoinvolvesignificant hazardsconsideration.

Thesixthoftheseexamplesreferstochangesthatmayresultinsome*increasetotheprobability orconsequences ofapreviously analyzedaccident, buttheresultsofwhicharewithinlimitsestablished asacceptable.

Asdiscussed inthebases,theminimumtemperature forcriticality ensuresthatthereactor,instrumentation, andvesselareoperatedintheiranalyzedtemperature ranges.Theserequirements arenot IC ATTACHMENT 1TOAEP:NRC:1067A Page4affectedbyourproposedrevisiontothesurveillance requirements.

Thechangeonlyimpactsthetemperature atwhichtheoperatormustmonitorTavgevery30minutestoensurethetemperature doesnotdropbelowtheminimumtemperature forcriticality.

Mewillbeproviding analarmthatwillalerttheoperatorthatthetemperature isapproaching itsminimumTavglimit.Therefore, webelievetheexamplecitedisapplicable andthatthechangesshouldnotinvolveasignificant hazardsconsideration.

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