ML17334B286

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
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: ML17334B286 ML17334B288
References
AEP:NRC:1067A, NUDOCS 8901120447
Download: ML17334B286 (11)

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

~~

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.