ML17333A355

Application for Amend to License DPR-74,removing TSs Re Shutdown & Control Rod Position Indication While in Modes 3, 4 & 5

ML17333A355
Person / Time
Site:	Cook
Issue date:	03/12/1996
From:	FITZPATRICK E INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17333A356	List: ML17333A355 ML17333A357
References
AEP:NRC:1248, NUDOCS 9603200113
Download: ML17333A355 (7)

Text

CATEGORYj.REGULAT+INFORMATION DISTRIBUTIONOZSTEM (RIDE)DISTRIBUTION CODE:A001DCOPIESRECEIVED:LTR ENCLSIZE:TITLE:ORSubmittal:

GeneralDistribution tACCESS.:GN

-NBR.:9603200113 DOC.DATE:

96/03/12NOTARIZED:

YESDOCKETFACIL:50.-316 DonaldC.CookNuclearPowerPlant,Unit2,IndianaM05000316AUTH.NAMEAUTHORAFFILIATION FITZPATRICK,E.

IndianaMichiganPowerCo.(formerly Indiana&Mi'chigan EleRECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk)

SUBJECT:

Application foramendtolicenseDPR-74,removing TSsreshutdown6controlrodpositionindication whileinmodes3,4S5.NOTES:RECIPIENT IDCODE/NAME PD3-1LAHICKMAN,J COPIESLTTRENCL1111RECIPIENT IDCODE/NAME PD3-1PDCOPIESLTTRENCL11INTERN.gCENTERCBNRR/DSSA/SRXB OGC/HDS2EXTERNAL:

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)PLEASEHELPUSTOREDUCEWASTElCONTACTTHEDOCUMENTCONTROLDESK,ROOMOWFN5D-5(EXT.

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TOELIMINATE YOURNAMEFROMDXSTRKBUTXON LXSTS"'FORDOCUMENTS YOUDON'TNEEDlTOTALNUMBEROFCOPIESREQUIRED:

LTTR12ENCL.11 IndianaMichigan~PowerCompanyPOBox16631Columbus, OH43216INOlANANlCHIGANPOWERMarch12,1996AEP:NRC:1248 DocketNos.:50-316U.S.NuclearRegulatory Commission ATTN:DocumentControlDeskWashington, D.C.20555Gentlemen:

DonaldC.CookNuclearPlantUnit2PROPOSEDAMENDMENT TOREMOVETECHNICAL SPECIFICATIONS 3.1.3.3AND3.10.5,"RODPOSITIONINDICATOR CHANNELS-SHUTDOWN,"

TOACHIEVECONSISTENCY WITHDONALDC.COOKNUCLEARPLANTUNIT1ANDNUREG-1431.Thisletteranditsattachments constitute anapplication foramendment tothetechnical specifications (T/Ss)forDonaldC.CookNuclearPlantunit2.Specifically, weareproposing toremovetheT/Ssrelatedtoshutdownandcontrolrodpositionindication whileinmodes3,4,and5.Thefollowing unit2T/Ssareaffected:

3.1.3.3and3.10.5andassociated surveillances andbases.TheexistingCookNuclearPlantunit2T/Ssrequirethatrodpositionindication beOPERABLEforeachshutdownandcontrolrodnotfullyinsertedinmodes3,4,and5.IfOPERABILITY cannotbeassured,thenumberofcontrolorshutdownrodsthatcanbewithdrawn islimitedtoasinglebankwhileperforming roddroptests.Thisrequirement isoverlyrestrictive since,duringshutdownmodes,theabilitytoensureadequateshutdownmargincanbecompensated byanincreaseintheboronconcentration ofthereactorcoolantsystem.Inadditiontothereduction inunnecessary requirements, theproposed, amendment wouldalsoaligntheaffectedunit2T/Sswiththeunit1T/Ssandtheimprovedstandardtechnical specifications issuedbytheNRCasNUREG-1431, Revision1.Attachment 1providesadetaileddescription oftheproposedchanges,thejustification forthechanges,andourdetermination ofnosignificant hazardsconsideration performed pursuantto10CFR50.92.Attachment 2containstheexistingT/Spagesmarked'76032001i3 9603i2PDRADQCK05000316PPDR00l~

U.S.NuclearRegulatory Commission Page2AEP:NRC:1248 toreflecttheproposedchanges.Attachment 3containstheproposedT/Spages.Webelievetheproposedchangeswillnotresultin(1)asignificant changeinthetypesofanyeffluentthatmaybereleasedoffsite,or(2)asignificant increaseinindividual orcumulative occupational radiation exposure.

TheseproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommittee andwillbereviewedatthenextregularly scheduled NuclearSafetyandDesignReviewCommittee meeting.Itisrequested thattheproposedamendment beapprovedbyApril12,1996insupportoftheupcomingunit2refueling.

Incompliance withtherequirements of10CFR50.91(b)(1),

copiesofthisletteranditsattachments havebeentransmitted totheMichiganPublicServiceCommission andtotheMichiganDepartment ofPublicHealth.ca~E.E.Fitzpatrick

,VicePresident SWORNTOANDSUBSCRIBED BEFOREMEotaryPublicpitAttachment cc:A.A.BlindG.CharnoffH.J.MillerNFEMSectionChiefNRCResidentInspector

-BridgmanJ.R.Padgett ATTACHMENT 1TOAEP:NRC:1248 DESCRIPTION ANDJUSTIFICATION OFCHANGES10CFR50.92ANALYSISFORCHANGESTOTHEDONALDCDCOOKNUCLEARPLANTUNIT2TECHNICAL SPECIFICATIONS ATTACHMENT TOAEP:NRC:1248 DESCRIPTION OFCHANGESPage1Thefollowing unit2technical specifications (T/S)3.1.3.3and3.10.5andassociated surveillances andbasesareaffectedbytheproposedchange.TS34133DeletetheReactivity ControlSystems,PositionIndicator Channels-Shutdown, LimitingCondition forOperation (3.1.3.3) andtheassociated surveillance (4.1.3.3)

(page3/41-22).TS3410.5DeletetheSpecialTestException, PositionIndicator ChannelsShutdown, LimitingCondition forOperation (3.10.5)andtheassociated surveillances (4.10.5.1 and4.10.5.2)

(page3/410-5).Also,deletethebasesreference toT/S3/4.10.5, PositionIndicator Channel-Shutdown(pageB3/410-1)IndexDeletereference to"Position Indicator Channels-Shutdown,"

fromthetechnical specification Index(pageIV).II.JUSTIFICATION FORCHANGESTheaxialpositionofshutdownrodsandcontrolrodsisdetermined bytwoseparateandindependent systems:thebankdemandpositionindication systemandtheanalogrodpositionindication (ARPI)system.Thecurrentunit2T/SsrequiretheARPIsystemtobeOPERABLEforeachshutdownandcontrolrodnotfullyinsertedinmodes3,4,and5.Tosatisfythisrequirement, twosetsofARPIcalibrations mustbeperformed.

Onecalibration isperformed onanindividual rodbankbasistosatisfytheARPIrequirements duringroddroptestinginaccordance withT/S3/4.10.5.

Thesecondcalibration isperformed atthecompletion ofthe"bank"calibration sequencetoensurethattherodsarecalibrated correctly toaddressbankoverlap.Thesecalibrations areredundant andtimeintensive.

Additionally, inmodes3,4,and5,theboronconcentration inthereactorcoolantsystem(RCS)isincreased toensurethatadequateshutdownmargin(SDM)isachievedandmaintained inaccordance withexistingCookNuclearPlantT/Ss.Thecalculation usedtoobtain ATTACHMENT TOAEP:NRC:1248 Page2therequiredboronconcentration takesintoaccounttherelativepositionofthecontrolandshutdownrods.Strictprocedural controlsareinplaceatCookNuclearPlanttoensurethatanallrodsoutshutdownmarginismaintained duringrodpositionindicator calibration.

Theadjustment ofboronconcentration toassureadequateshutdownmargininmodes3,4,and5isalsosupported bytheImprovedStandardTechnical Specifications (ISTS)forWestinghouse Plants(NUREG-1431).

TheISTSdoesnotcontainaT/Sforrodpositionindication inmodes3,4,and5;however,thebasespositionforthemodes1and2T/Ssaddresstheshutdownmodesinthefollowing manner."InshutdownMODES,theOPERABILITY oftheshutdownandcontrolbankshasthepotential toaffecttherequiredSDM(shutdown margin),butthiseffectcanbecompensated forbyanincreaseintheboronconcentration oftheReactorCoolantSystem."Therefore, theassurance thatadequateshutdownmarginexistsforanallrodsoutcondition inmodes3,4,and5negatestheneedforrodpositionindication inthesemodes.Technical specification 3.10,5isa"specialtestexception" directlytiedtoT/S3.1.3.3.Specifically, itprovidesanexemption fromthe"position indicator channel-shutdown" requirements duringroddroptesting.Deletionofthisspecification isnecessary sincetheprimaryspecification 3.1.3.3isbeingdeleted.Itisconcluded thatthedeletionofT/S3.1.3.3,PositionIndication Channels-Shutdown, doesnotresultinareduction insafetyastheimpactonshutdownmarginisadequately compensated forbyanincreaseinboronconcentration thatisconsistent withtheguidanceofNUREG-1431.III.10CFR5092CRITERIAPer10CFR50.92,thisproposedchangedoesnotinvolveasignificant hazardsconsideration becausethechangedoesnot:involveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated, 2.createthepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated, or3.involveasignificant reduction inamarginofsafety.

Attachment 1toAEP:NRC:1248 Page3Criterion 1Theboronconcentration inthereactorcoolantsystemwillbehighenoughtoassureadequateSDMinmodes3,4,and5.Thecalculation toobtaintherequiredboronconcentration takesintoaccountthepositionoftherods.Shutdownmarginisassumedasaninitialcondition inthesafetyanalysis.

Thesafetyanalysisestablishes aSDMthatensuresspecified acceptable fueldesignlimitsarenotexceeded.

AslongastheSDMissatisfied, nochangeintheprobability orconsequences ofanaccidentpreviously evaluated willresultfromtheproposeddeletionofthe"position indicator shutdown" specification.

Itisnotedthatthischangeisconsistent withthenewISTSapprovedbytheNRCasNUREG-1431, Rev.l.Criterion 2TheabilitytoinsertthecontrolandshutdownrodsprovidedbytherodcontrolsystemisnotaffectedbytheOPERABILITY statusoftheARPIsystem.Asmentioned previously, thereactorcoolantsystemboronconcentration willbehighenoughtoassureadequateSDMismaintained.

Therefore, itisconcluded thattheproposedchangesdonotcreatethepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated.

Criterion 3Themarginofsafetyrequirements, arenotaffectedbytheremovalofthisT/S.TherequiredSDMwhichisaninitialcondition inthesafetyanalysis, isunaffected sincethereactorcoolantsystemboronconcentration isincreased toaddressthe.potential "allrodsout"configuration.

Basedontheseconsiderations, itisconcluded thattheproposedchangesdonot'involve asignificant reduction inamarginofsafety.