ML17037C283

Nine Mile Point Unit 1 - Letter Responding to the September 18, 1972 Letter Requesting Additional Information Concerning Basic Data for a Source Term Calculation and for a Gaseous and Liquid Analysis

ML17037C283
Person / Time
Site:	Nine Mile Point
Issue date:	10/10/1972
From:	Brosnan T J Niagara Mohawk Power Corp
To:	Muller D R US Atomic Energy Commission (AEC)
References
Download: ML17037C283 (24)

Text

eAECDISTRIBUTIONFORPART0DOCKETMATERIALTEMPORARYFORM~~CoiNTROLNO:FROM:ANiagaraMohawkPower'CorporatiSyracuse,N.Y.13202T.J.BrosnanTO~DATEOFDOC:n10-10-2ORIGCCFIDATEREC'DLTRhSMORPT10-12-2hh.MullerCLASS:tlPROPINFOINPUTNOCYSREC'DDQCiKTNO:50-220DESCRIPTION:Ltrreour9-18-72ltr,transthefollowing:ENCLOSURES:Basicu33ataforaSourceTermCalculationand.',foraGaseousand.Licpd.d.analysis~subnd.tted,inresponsetoour9-18-72ltr.PLANT~S:Ninehg.lePointUnitNo.1DONOTREMOVENkkilmlBhM'UTLER(Z,)W/CopiesCLARK(Z,)W/CopiesGOLLERW/CopiesKNXEZ,(Z,)W/CopiesSCHWEÃCER(L)W/CopiesSTOLZ(L)W/CopiesFORACTIONINFORMATION10 2ABVASSALZO(L)ZIEMANN(L)K1rrGHTON(ENVXRO)W/CopiesW/CopiesW/CopiesH.DENTONCHITS~'OOD(FM}YOUNGBIOOD(EIPXRO}W/-CopiesW/CopiesW/CopiesSCHEMEL(L),DICKER(ENVIRO)~BENAjmA----W/CopiesW/CopiesW/4.CopiesFHAECPDROGCpROOMP-506AhAATZING/STAFFCASEGXAMBUSSODEYOUNG-L(PWR)SKOVHOLT-LP.COLLINSvREGOPRFELSLREGLUE(2)~MORRlSSTELLETECHREVIEWSCHROEDERMACCARYLAKGEPAWLICKISHAOK1iHSTELAhiooREHOUSTONTEDESCOlDNGLAXNASBENAROYAVOLLhKR~DEFlQNGRIMESGNATLLpKASTNER3ALLARDFINERWEROMULLERDICKER-KNIGHTONYOUNGBLOOD~PROJECTLEADERNORRISHARLESSF8:MSMZ]ZYNUSSBAUMERLXCASST.MASONLWILSONLh1AIGRETLSMITHLGEARIN~L~DXGGSLTEETSL'LEELWADEESHAFERF8'BROWNEG.WILZZANSEE.GOULBOURNELATINDSALTZMANPLASSmGAMERESFELEERMOEOEALEDUBEINFOCoMILES~ZIEMANNp1-LOCALPDR1-VVXE(mWNATHY)1-NSXC(BUCHANAN)1-ASLB-YORE/SAYREWOODWARD/H.ST.16CYSACRSHOLDINGrEXTERNALDISTRIBUTION.~kS(5)Q4-NATIONALLABsoRNI,1-R.CARROLL-OCpGT-B2271-R,CATLINpA-170GT1CONSULANT'SNEWMARK/BLUME/AGABIAN1-PDR-SAN/LA/NY1-GERALDLELTOUCHE3ROOKHAVENNAT.LA31-AGMED(WALTERKOESTERFRmC-427'T)1-RD.~.MULE&...F-309GT

,,PWerx'p!'o,~tvg)'Y">,~"fiIyii)p~f),g,~ggJ'g.'G'WlgI'p',ll,()li~~=IIJ)I~gll RefutatoryNIAGARAMOHAWKPOWERCORPORATIONNIAGARA~~MOHAWK~ihlllCL.300ERIEBOULEVARDWESTSYRACUSE,N.Y.I3202October10,1972Mr.DanielR.Muller,AssistantDirectorforEnvironmentalProjectsDirectorateofLicensingU.S.AtomicEnergyCommissionWashington,D.C.20545

DearMr.Muller:

ClgP~P-Ica~~ICDRe:NineMilePointUnitNo.1Docket50-220Transmittedherewithare45copiesoftheinformationrequestedinyourletterofSeptember18,1972.Arrangementshavebeenfinalizedtomeetwithrepre-sentativesofOakRidgeNationalLaboratoryonOctober20,1972,todiscussthismaterial.Sincerely,TJB/vkEnclosures.J.BrosnanVicePredentandChiefEngineerDOCK~VS+CEIOCT1Z.]gPPi~RE<ill4ynay5'"~~4I'tie'fTt~'-

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UESTION1Reactorpower(MWt)andplantcapacityfactor(%)atwhichimpactistobeanalyzed.ANSWERThelicensedreactorpoweratwhichimpactistobeanalyzedis1850MWt.Thecapacityfactorfortheunitis85percent.(EnvironmentalReportSection9)UESTION2WeightofUloaded(firstloadingandequilibriumcycle).ANSWERTheinitialcorecontained227,577lbs.ofuranium.Theequilibriumcyclewilldependontheannualcapacityfactor,andthethencurrentdesignpractices.Itisanticipatedthattheuraniumloadingforequilibriumcoreswillnotdiffersignificantlyfromthatoftheinitialcore.UESTION3Isotopicratioinfreshfuel(firstloadingandequilibriumcycle).Theinitialcorecontainedanaverageof2.1%U-235(asmeasured)ascomparedwiththe2.12%designvaluereportedinthePSAR(VolumeI,SectionIV,Page4).Equi,libriumreloadfuelisexpectedtocontainanisotopicratiointherangeof2.58w/oU-235.UESTION4Expectedoffgasrateafter30minutesdelay.ANSWERTheexpectedoffgasrateafter30minutesdelayislessthan50,000mCi/sec.(Ref.EnvironmentalReportTable3.6-1,Sec.3.6.3.3,3.6.3.5.1) lIIf Escaperatecoefficientsused(orreference).ANSWERNobleGasReleaseRate(1)R=2.6x10yJi'1-e)(e)HaloenReleaseRate.(2)R=2.4x10yR'1-e)(e)0.5-4'aloenReactorWaterConcentration(3)cV(+++'()PWhere:R=Releaserateofisotope(wCi/sec)iY=Fissionyieldofisotopei(atoms/fission)-1=Decayconstantofisotopei(sec)iT=Fuelirradiationtime(sec)t=Decaytimefollowingreleasefromfuel(sec)C=Concentrationofisotopeiinreactorwater(~Ci/g)Volumeofwaterinoperatingreactor(cc)-1Cleanupsystemremovalconstant(sec)Cleanusstemflowrate/sec8=Quantityofwaterinoperatingreactor(g)-1Steamcarryoverremovalconstant(sec)forhalogensY=0.01steamflow-/secQuantityofwaterinoperatingreactor(g)=Densityofwaterinanoperatingreactor=0.74g/ccNobleGasReleaseRatesThereleaserateofnoblegasescanbeexpressedbythesimplifiedformofEquation(1):R=Kykgg

Theobservedexperimentaldatahaveshownavariationinindividualnoblegasisotopeswithrespecttoeachotherthatcanbeexpressedintermsofvariationinm,theexponentofthedecayconstantterm(g).Theaveragemeasuredvalueof"mwas0.4withastandarddeviationof%0.07.Withthe$Rat30minsetat50,000~Ci/sec,thevalueofKgiscalculated'fterselectingthevalueofm.HaloenReleaseRatesThereleaserateofhalogenscanbeexpressedbythesimplifiedformofEquation(2):R=KYA,nnTheobservedexperimentaldatahaveshownavariationinindividualhalogenisotopeswithrespecttoeachotherthatcanbeexpressedintermsofvariationsinn,theexponentofthedecayconstantterm(A).Theaveragemeasuredvalueofnwas0.5withastandarddeviationof~0.19.WithI-131releaseratesetat700~Ci/sec,thevalueofKniscalculatedafterselectingthevalueofn.UESTION6Massofprimarycoolantinsystem(lb).a.Massofprimarycoolantinreactor;masswater;masssteam(lb).b.Massofprimarycoolantinrecirculatingsystem(lb).c.Fractionofprimarycoolantinmaincondenser(lb).ANSWERa.MassofwaterinreactorMassofsteaminreactorb.Massofprimaryco'olantinrecirculatingsystemc.Massofprimarycoolantinthemaincondenseris918,000lbs.Thisisapproximately5/8ofthetotalprimarycoolantinventoryexcludingthecondensatesystem,thefeedwatersystemupstreamoftheisolationvalve,themainsteamsystemdownstreamofthesecondisolationvalve,theturbineandthecondensersteamspace.379,400lbs.11,600lbs.90,500lbs.

1 Steamconditions,atturbine(tempF,presspsi,flowlb/hr).ANSWERflow,lb/hr*pressure,psia7.25xlO6965538*Includes5,000lbs/hrairejectormotivesteamand410,000lbs/hrsteamflowtoreheat.UESTION8Normalrecirculationflowrate(lb/hr).ANSWERNormalrecirculationflowthroughthecoreatthe-designratingis67.5x106lbs/hr.Thisfigureincludesbothcirculationandfeedwaterflow.UESTION9Normalclean-upsystemflowrate(lb/hr).Whattypeofresinsareused?Whatdecontaminationfactorsareexpectedforeachprincipalnuclide?Whatisthefrequencyofregenerationandvolumeofregenerants?ANSWERThenormalflowthroughthereactorwaterclean-upsystemis300,000lbs/hr.Thedesignflowis380,000lbs/hr.Theionexchangeresinisamixtureofcationandanionresins(amberlite200andIRA900).Theresinsare2to1byvolume,cationtoanion.Whiletheindividualradionuclidedecontaminationfactorshavenotbeendeter-mined>theoveralldecontaminationfactorisexpectedtobeatleast10.Operationally,experiencehasdemonstratedthatregenerationoftheclean-updemineralizerresinsisnotpractical.Therefore,theseresinsareremovedafteraservicelifeofaboutsixmonths.UESTION10Describeandprovidetheexpectedperformanceoftheexpandedgaseousradwastetreatmentsystemfromthemaincondenserairejector?Givetheexpectedairinleakage.Isthecondenserejectoronestageortwostage?Whereisitdischarged?Howmanycondensershells'(Ifapplicable-poundsofcharcoalandoperatingtemperatureF)

ANSWERThehold-upportionoftheoffgassystemwillbeacharcoalbasesystemdesignedtoprovidehold-uptimesof20daysforxenonisotopesand33hoursforkryptonisotopesbasedonanair(condenser.airinleakage)flowrateof22cfm.Sincetheairinleakageisexpectedtobeapproximately10cfmmaximum,theexpectedoffgassystemhold-uptimeswouldbeapproximatelytwicethedesignvaluesgivenabove.Thecondenserairejectionsystemisatwo-stagedesignthatdis-chargestotheoffgassystem.Thereisonecondensershell.Thecalculatedquantityofcharcoalrequiredis85,000lb.at77F.Whatistheexpectedleakrateofprimarycoolanttothedrywell(lb/hr)?Howfrequentlyisthedrywellpurged?Whattreatmentisgiventothispurgeandwhereisitreleased?ANSWERTheleakrateofprimarycoolanttothedrywellisestimatedtobe5.5gpm(2750lb/hr)(FSAR,FifthSupplement,P-18).Thisleakageisfromtherecirculationpumpsealsandfromvalvestempacking.Itisnotexpectedthatthedrywellneedbeventedandpurgedonaroutinebasisduringnormaloperation.Thecontainmentwillbepurgedduringeachstartupwithpurenitrogenuntiltheatmospherecontainslessthanfivepercentoxygen.Thecontainmentwillbedeinertedduringreactorshutdownformaintenanceand/orrefueling(i.e.approximatelyonceperyear).Gasesfromthecontainmentarenormallyexhausteddirectlytothestackbyafanratedat10,000cfm.However,thegasescanberoutedthroughthereactorbuildingemergencyventilationsystemifnecessary.UESTION12Whatistheexpectedleakrateofprimarycoolant(lb/hr)tothereactorbuilding?Whatistheventilationairflowthroughthereactorbuilding(cfm)?Whereisitdischarged?Istheairfilteredorotherwisetreatedbeforedischarge?Ifso,provideexpectedperformance.ANSWERTheexpectedleakrateofprimarycoolanttothereactorbuildingisnegligible.Mostleakageisidentified(suchaspumpseal,valvepacking,etc.)andgoestoclosedequipmentdrains.Verylittle,ifany,ofthesefindtheirwayintothereactorbuildingatmosphere.

-6"-Floordrainleakagehasbeenaveragingontheorderof1.0gpm.However,theamountofprimarycoolantinthiswaterisverysmall(aboutlx103gpmbasedonactivityanalysis).Thenormalventilationairflowthroughthereactorbuildingis35,000cfmwhichisdischargedtothestack.Theexhaustisnottreated,butradiationmonitoringisprovided.Amaximumflowof70,000cfmcanbereachedwithhighspeedpurging.UESTION13Whatistheexpectedleakrateofsteam(lb/hr)totheturbinebuilding?Whatistheventilationairflowthroughtheturbinebuilding(cfm)?Whereisitdischarged?Istheairfilteredortreatedbeforedischarge?Ifso,provideexpectedperformance.ANSWERTheleakrateofsteamtotheturbinebuildingisnotexpectedtoexceed7gpmor2,610lb/hr.(EnvironmentalReport,Sec.5.2.5.2)Theventilationexhaustsystemhastwofans.Thefansareinter-lockedsothatonlyonecanoperateatatime.Thenormalventilationairflowthroughtheturbinebuildingis170,000cfm,whichisdischargedtothestack.Thenormalexhaustisnotfilteredorotherwisetreatedbeforebeingdischarged.UESTION14Describethetreatmentoftheexhauststreamfromtheturbinesealglands.a.Whatistheoriginofthesteamusedintheglandseals'?(i.e.,isitprimarysteamcondensate,ordemineralizedwaterfromaseparatesource,etc.?)b.Howisthewastestreamfromtheglandsea1streatedanddisposedof'c.Indicatehowoftenthemechanicalvacuumpumpwillbeoperatedandtheexpectedrangeofactivityreleased.ANSWERa.Theoriginofthesteamusedfortheturbineglandsealsisprimaryreactorsteam.b.Thesteamfromthepackingexhaustersiscondensedandtheairandgasesthatremainaresentthrougha1.75minholduppipe.Theholduppipedischargestothestackwhereitisdilutedwithventilationair.

al~'C~Themechanicalvacuumpumpsystemisprovidedforhoggingairfromthecondenserpriortostartingtheturbine.Thesystemisemployedaftereachrefuelingandmaintenanceoutage,whichareannualevents,andatsuchotherextendedshutdownswhichmaybenecessitatedintheinterim.Overthelifeoftheunit,theseadditionalshutdownsshouldnot,averagemorethanoneperyear.Theamountofactivityreleaseddependstoalargedegreeuponthepreshutdownoffgasreleaserate,thetypeoffissionproductmixture,thedurationoftheshutdown,andthelengthoftimerequiredtoevacuatethecondenser'.Further,theactivityreleasetendstopeakwithinthefirstfewminutesofhoggingoperationanddecayssubstantiallythereafter.Consideringthesefactors,thereleaserateoverseveralhoursofhoggingoperationmightaverageouttobeinthesamerangeasthepreshutdownoffgasreleases.UESTION15Provideaveragegallons/dayand>Ci/ccpriortotreatmentforthefollowingcategoriesofliquidwaste.UsecurrentlyobserveddataintheindustrywheredifferentfromtheSARorEnvironmentalReport(indicate,whichisused).aab.C~d.Foraab.c~d.High-puritywastes(forexample,"clean"orlowconductivitywasteandequipmentdrains).Giverangeofactivityexpected."Dirtywastes(forexample,floordrainwastes,high-conductivitywastes,andlaboratorywastes).Giverangeofactivityexpected.,Chemicalwastes.Giverangeofactivityexpected.Laundry,decontamination,andwash-downwastes.Giverangeofactivityexpected.thesewastes(a-d),'rovide:Numberandcapacityofcollectortanks.Fractionofwatertoberecycledorfactorscontrollingdecision.Treatmentsteps-includenumber,capacity,andprocessD.F.foreach,principalnuclideforeachstep.'fstepisoptional,statefactorscontrollingdecision.Decaytimeforprimarylooptodischarge.ANSWERThisresponseisbasedoninformationcontainedintheEnvironmentalReport.a~Hih-uritWastesEquipmentdrainsCondensatedemin.rinseURCWashwaterWasteconcentratordistillateDrywellfloordrainsGallons/~da63,0002,5001,500,4,0001,000Activity~Ci/ccMax.0.110.0250.0450.005852X10b.DirtWasteFloordrainsCentrifugeEffluentLaboratoryDrainsConcentratorRinse4,0001j30050050I0.00260.00010.0010.1

c.ChemicalWastesRegenerantChemicalsGallons/~da1>000Activity~Ci/ccMax.3.0d.LaundDecontaminationandWash-DownWastesLaundrywastesDecontaminationdrains30050(1X101.01.Highpuritywastes-collectortanks2.Dirtywastes-collectortanks3.Chemicalwastes-neutralizingtanks4.Both162abovecanoverflowtowastesurgetank5.LaundrydraintanksNo.Forthesewastes(a-d),provide:a.Numberandcapacityofcollectortanks.SizeGallons25700010,00015,00050,00010,000b.Undernormaloperatingconditions,approximately96percentofthewasteliquidisexpectedtoberecycledforreusewithintheunit.Thefractionswhichwillberecycledareasfollows:1.Equipmentdrains,condensatedemineralizerrinse,URCwashwater,wasteconcentratordestillate,drywellfloordrains-97%ofthiswaterisexpectedtoberecycled.2.Floordrainsandcentrifugeeffluent-about50%ofthiswastewillberecycled.3.Regenerantchemicals,laboratorydrains,concentratorrinse,decontaminationdrains-allofthiswaste,waterisexpectedtoberecycled.4.Laundrywastes-100%discharge.c.TreatmentSteps1.Highpuritywastea)WasteCollectorFilter-1capacity-300gpmdecontaminationfactor-5b)Demineralizer-1capacity-300gpmdecontaminationfactor-1000

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2.Dirtywastea)Floordrainfilter-1capacity-300gpmdecontaminationfactor-5b)Travelingbeltfilter-1capacity-40gpmdecontaminationfactor-5c)Wasteevaporators-2capacity-81-12gpm,./f2-20gpm"decontaminationfactor-81-500,//2-300,000*Thefloordrainfilter,travelingbeltfilterandwasteevaporatorsforhandlingthedirtywastewillbeattheoptionoftheoperator.Theevaporatorsmayalsobeusedforchemicalwastesbelow.3.ChemicalwastesWasteevaporators-describedaboved.Decaytimefromprimarylooptodischargeis24hours,minimum.*UpgradedSystemasdescribedinEnvironmentalReport,Sec.3.6.3UESTION16Forthecondensatedemineralizersprovidetheflowrate(lb/hr),typeofresinused,expectedbackwash,andregenerationfrequency,andexpectedD.F.foreachprincipalnuclide.ANSWERThedesig~flowrateforthecondensatedemineralizersystemis7.25x10lb/hr.Sincefivedemineralizersareinservice,(andonestandby)eachoneisexpectedtopass1.45x106lb/hr.Theresinsareofthemixedbedtype(amberlite200andIRA900)andconsistof2to1,byvolume,cationtoanion.Eachdemineralizerisregeneratedonafrequencyofapproximatelyeverysixweeks.Anultrasonicresincleanerwillbeinstalledatthestation.Itisexpectedthatthisequipmentwilldecreasethefrequencyofregenerationsothateachdemineralizerwillberegeneratedapproximatelyeverysixmonths.Backwashingisnotpresentlyemployedsinceithasproventobeoflittlevalue.Althoughtheexpecteddecontaminationfactorforeachnuclideisnotavailable,thedesignbasisforthecondensatedeminer-alizersystemissuchthatessentially100percentremovalefficiencyforallprincipalfissionandcorrosion/activationproductsmaybeassumed.UESTION17Dilutionflowrateforliquideffluents,minimumandnormalgpmandtotalgallonsperyear.

I~~I

-10-ANSWERThenormaldilutionflowrateis268,000gpm.Theminimumflowisapproximately18,000gpm(servicewaterflow).Assumingan85percentcapacityfactorfortheunit,thetotaldilutionflowperyearwouldapproach120billiongallons.UESTION18Howiswasteconcentrate(filtercake,demineralizerresin,evaporatorbottoms)handled'7Givetotalvolumeorweightandcuriesperdayoryear.Includetheexpectedannualvolumeofdrywasteandcuriecontentofeachdrum.ANSWERFiltersludgeisdewatered,transferredintocontainers,andshippedoffsitefordisposal.Filtercakefromthetravelingbeltfilterisdischargedintodrums,stored,andshippedoffsitefordisposal.'pentresinsareflushedtoprocessingfacilities,dewatered,loadedintocontainers,stored,andshippedoffsitefordisposal.Concentrates(evaporatorbottoms)arecooledpriortotransfertothepackagingfacilities,mixedwithanabsorbent,loadedincontainers,stored,andshippedoffsitefordisposal.(Ref.EnvironmentalReport,Sec.3.6.4.2)SolidRadwasteNo.ofVolume~Shdments~ShdedTotalcuriesNo.ofCiperBasedoninputfromJan.1,1971,toDec.31,19714412,910ft.201.211,7560.115 4~0l4