ML17301A024
| ML17301A024 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 03/04/1983 |
| From: | UHRIG R E FLORIDA POWER & LIGHT CO. |
| To: | EISENHUT D G Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML17213B100 | List: |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737 L-83-122, NUDOCS 8303090340 | |
| Download: ML17301A024 (39) | |
Text
RE.DLSTORvP.R.ATION OISTRIBOTION STNIRIDS>ACCESSION
%<BRi8303090300 DOC~DATE:83/03/00NOTARIZED; NOFAOIL;50-389 St,LuciePlantEUni't2EFlorida,PowerLLightCo.AUTH~NAMEAUTHORAFFILIATIONUHRIGgR,E~Flor,idaPower8LightCo,.RECIP,NAIVE RECIPIENT AFFILIATION EISENHUTEDBG.
DivisionofLicensing
~8<~DOCKET05000389
SUBJECT:
Forwardsinfodemonstrating capability ofpostaccidentsamplingsysclosingoutSERopeni.tems.."Interim Procedure Guideline forCoreDamageAssessment" alsoencl,DISTRIBUTION CODE:BOOISCOPIESRECEIVED:LTR
.ZENCLgSIZE:~~+L+~TITLE!Licensing Submittal:
pSAR/FSAR Amdts8RelatedCorrespondence'OTES:
RECIPIENTIDCODE/NAMF A/OLICENSNGLICBR03LAINTERNAL!
ELO/HDS2IE/OEPEPOS35NRR/OF/AEAB NRR/OE/EQB 13.NRA/OE/HGEB 30NRR/OE/MTEB'7 NRR/OE/SAB 20BIRR/OHFS/HFE000 NRR/DL/SSPB NRA/DsI/ASBNRR/OSI/CSB 09NRR/DSI/METB 12AB2?GFIL04R/MIBEXTFRNAL~ACRSQlDMB/DSS{AMDTS)LPDR03NSIC05COPIESLTTRENCL10101011102111111011111111106611111RECIPIENT IDCODE/NAME LICBR43BCNERSESEV~01IEFILEIE/DEP/EPLB 36NRR/OE/CEB 11NRR/DE/CB 28NRR/DE/MEB 18NRR/DE/QAB 21NRR/DE/SEB 25NRR/DHFS/LQB 32NRR/DSI/AEB26NRR/DSI/CPS10NRR/DSI/ICSB16NRR/OSI/PSB19NRR/DSI/RSB 23RGN2BNL(AMOTS ONLY)FEMA"REPDIV39NRCPDR02NTISCOPIESLTTRENCL1011113112211111111111'1111311111111TOTALNUMBEROFCOPIESREQUIRED.
LTTR52ENCL45 AIllI+IlfJ)riffIfitItJtjf>'W(fffffrffl'flittffflittrNtfIWr'ilt'fear f<<ff'>>tt~'lErt$"llitf(flItillff9(p1)'I11ytrr<<f(liffff'1.((~,S(tr~.'fI((f"'t&III),'jljrA~I'gNtf(IXtIf1'"PjrI,lfIirtikIifrltf,*'i,f,Il>>rrI4
.BOX14000,JUNOBEACH,FL33408FLORIDAPOWER8(LIGHTCOMPANYMarch4,1983L-83-122OfficeofNuclearReactorRegulations Attention:
Mr.DarrellG.Eisenhut, DirectorDivisionofLicensing U.S.NuclearRegulatory commission Washington, D.C.20055
DearMr.Eisenhut:
Re:St.Lu"ieUnitNo.2DocketNo.50-389PostAccidentSamlinSstemCaabilitInSupplement 2oftheSER,thestaffrequested theapplicant, by5%power,todemonstrate thecapability ofthePostAccidentSamplingSystemto:1)Provideforachlorideanalysiswithin4daysafterthereactorcoolantsampleistaken;2)Providethecapability toidentifyandquantifytheactivityforreactorcoolantandcontainment atmosphere postaccidentsamples;3)Provideaprocedure forrelatingradionuclide gaseousandionicspeciestoestimatecoredamage.Theattachedinformation isprovidedtocloseouttheaboveopenitems.Thisinformation hasbeeninformally giventoyourstaffforreviewandfoundtobeacceptable.
Inaddition, thepresentSt.LucieUnit2chemi"calprocedures haveincorporated themethodology forestimating coredamageperthedescription providedinitem3.Ifyouhaveanyquestions regarding thissubmittal, pleasecontactus.Verytrulyyours,RobertE.UhrigVicePresident AdvancedSystems&Technology REU/RJS/cab 8303090340 830304PDRADOCK05000389PDRPEOPLE...
SERVINGPEOPLE 8303090340 POST-ACCIDENT SAMPLINGSYSTEMSuPPLEMENTAL INFORMATION b'.
TABLEOFCONTENTSCriterion 1Criterion 2Criterion 3Criterion4Criterion 5Criterion 6Criterion 7Criterion 8Criterion 9Criterion 10Criterion ll~Pae137710ll1314151719Attachment 1InterimCoreDamageProcedure
~~~Criterion:
(1)Thelicenseeshallhavethecapability topromptlyobtainthereactorcoolantsamplesandcontainment atmosphere samples.Thecombinedtimeallotted, forsamplingandanalysisshouldbe3hoursorlessfromthetimeadecisionismadetotakeasample.Response:
TheattachedPertchartpresentsaconservative estimateoftimerequiredforoneexerienced operatortoperformPASSrecirculation,
- analysis, anddilutionprocedures asdescribed intheoperating procedures ofthePASSTechnical Hanual.Thetimesshowninthecharthavebeenverifiedthroughfieldoperation ofasimilarC-EPASSattheSanOnofreUnit2plant.ThePASSisdescribed inSection9.3.6oftheFSAR.ThePASSLaboratory islocatedintheReactorAuxiliary Building(RAB)onthegroundlevel19.50'levation.
TheRadiochemistry SampleRoomislocatedintheRABonthesameelevation asthePASSLaboratory.
TheSampleRoomandthePASSLaboratory areonthesamehallwayapproximately 40feetapart.ThePASSperformsthechemistry analysisforboron,pH,totaldissolved gas,hydrogenandoxygenoffgas,anddissolved oxygenusingon-lineinstrumentation withbackupgrabsamplingcapability.
Analysisofchlorides andradiological fissionproductanalysisisperformed throughgrabsamples.ThesesamplesareanalyzedintheRadiochemistry SampleRoom.,Grabsampletransport totheSampleRoomisperformed bytwomeans.Thefirstmeansoftransport istheGrabSampleFacility.
TheGrabSampleFacilityprovidesthecapability tocollectanundiluted reactorcoolantliquidgrabsample.TheGrabSamplingFacilityconsistsofanundiluted depressurized liquidsamplevesselenclosedinaleadshieldedcask,isolation andbypassvalveswithstemextensions penetrating theshielding forconnection tothePASS, apalletlifthandtruck,anddoubleendshut-offquickdisconnects
'orinterface connections tothePASSsamplestationliquidsamplereturnline.Samplingisperformed asfollows:Thehandtruckcontaining thecask.ismaneuvered tothePASSsamplestationliquidsamplereturnlineteesandtheassemblyisconnected tothesystembymeansofthedoubleendedshut-offquickdisconnects.
Onceconnected, thegrabsamplingassemblyisflushedwithdemineralized waterviathePASSsamplestationconnection.
Theliquidsamplepathpressureindicator (P-503)canbeusedtocheckforleaksbeforeanycontaminated fluid'sallowedtoenter.Following satisfactory pressurization, anundiluted sampleispurgedthroughthePASS.Whenarepresenta-tivereactorcoolantsampleisavailable, thesamplevesselandconnection teeisolation valvesareopenedtoallowflowthroughtheUndiluted LiquidSampleVesselandtheGrabSamplingFacilitybypassvalveisclosed.Whenpurgingofthesamplevesseliscomplete, thesampleisisolatedbyopeningthebypassvalveandclosingtheisolation valves.SamplepurgeflowthroughthePASSissecured.Priortodisconnecting thecask,ademineralized waterflushisaccomplished byestablishing flowviathePASSsamplestationconnection throughthenormalliquidsamplereturnlinepath.Theconnection teeisolation valvesareopenedandtheGrabSamplingFacilitybypassvalveisclosed,allowingade-'ineralized waterflushofalltubingexceptforthesamplevesselandisolation valves.Thisminimizes radiation exposureandthepossibility focontamination whenthecaskisdisconnected.
Thecaskisdisconnected fromthesystembymeansofmanuallydetaching thedoubleendshut-offquickdisconnects.
Thecaskisthentrans-portedonthepalletlifthandtrucktotheRadiochemistry SampleRoom..
0
- Sulu~IIVII'1.l.Till:INSSSTSTLIA I.IIKnfnltn.
NCATTAACNIOAItl.lnvurtlrATIOCI ANLTltnttfoONt,1tlOFLAATORIttINC*55ROOM(Tpnt/LcIlcct(SULNF~IAT) lt@CARIcoIIAFntltt IAIURSFINRI'UUF nccntcsAIIFLcIIIIICJVCJICONT,AINMLtll 5AINLS"-"'""'-"*"'"'""""'0 COLLSCTUNCALVILO CIIAOSAMFLEOfOC>SILO)ALLOWSTSIEMTEMFTRATVnt TOSTAOILTLC SwIICNfLOWtO6SAMFLF.FAIN)CAIIIIRATC TIKOtAN2ANALTTLRS SIAnrncActonCCOLACCTSAUFIL(QtCIACUIAFSFM)FURCLItfcon0oononsFllIILAOFIOS AI.LO'K.AMFT.O
~amrruLFlNLATMSASCAICTOTALCASICOCTAC SLCURSLIOUIOfIICNANCSR 10ntlilAI.TOTALSCCTfSAAITEAu~rLowcooLootnl CASTCLUMS gTtncttcttATT MTASUREOISSOLYTO COLLTCTAIttAOtOLUILOCASAICALTZLRS ygAOSAMFIFCOLLTCTAINLUIEOLIOIPO0SAMFLC0.0$OtI5OttoKNOS1t051tuf,SFANSAntMFAIITSNISUtnIISOIISOf0202:5$":-~-5..IFowsnL:.22~SISItuSTtt:.Sfotm TttttrOTTTtefoSTACCIDETTT FUULSLSKT SYSTTIA%05~="IS-ittnST.LLTcIETnsf2~tiltI~IU~uk'L~~t\I
Thesecondmeansoftransport isviasamplesyringes.
Thedilutedsamplesareobtainedthroughseptumplugslocatedbehindasmallpenetration intheshieldwallusingasyringeforsamplewithdrawal.
Standardlaboratory syringesareemployedforthispurpose.Following removalofadilutedsamplethesyringeiscappedtopreventlossofthesampleandplacedinahandheldcontainer andtransported totheRadiochemistry SampleRoom.TheresponsetoCriteria(6)addresses theradiation protection aspectsofGrabSamplehandling.
ThePASSisdesignedwiththecapability tosampleunderthecondition ofalossofoffsitepower.ThePASSissuppliedwithelectricpowerfroma120/208NABpowerpanelwhichisconnected tothedieselgenerator.
~~Criterion:
(2)Thelicenseeshallestablish anonsiteradiological andchemicalanalysiscapability toprovide,withinthree-hour timeframeestablished above,quantification ofthefollowing:
(a)certainradionuclides inthereactorcoolantandcontain-mentatmosphere thatmaybeindicators ofthedegreeofcoredamage(e.g.,noblegases;iodinesandcesiums,andnon-volatile isotopes);
(b)Hydrogenlevelsinthecontainment atmosphere; (c)dissolved gases(e.g.,H2),chloride(timeallottedforanalysissubjecttodiscussion below),andboronconcentra-tionofliquids.(d)Alternatively, haveinlinemonitoring capabilities toper-formallorpartoftheaboveanalyses.
(2a)Radionuclide analysisisperformed throughanalysisofdilutedandundiluted grabsamplesobtainedfromthePASS.Thecapability forcollecting andhandlingthesegrabsamplesaredescr'ibed intheresponsetoCriterion (1)above.ThesamplesareanalyzedusingGermanium-Lithium semiconductor analyzers locatedintheRadiochemistry SampleRoom.TheseAnalyzers arecalibrated fortheradionuclides Xe133,I-131,-I-133,Cs-137,Cs-134,Kr-85andBa-140amongothers.Theanalyzers canquantifyallradionuclides requiredforcoredamageassessment.
Theeffctsofbackground radiation onsampleradiochemistry analysisisreducedthroughtheuseofleadshielding aroundthesamplechamber.Asabackup,shouldthebackground radiation levelsintheReactorAuxiliary Buildingexceedthecapabilities ofthisshielding, thesamplescanbetransported totheradio-chemistry laboratory attheSt.LucieUnit1plant.St.LucieUnit1hasredundant analysisequipment tothatprovidedintheUnit1plant.Thetwoplantsareadjacentandtransport ofthesampleswouldnotrequirethemtoberemovedfromthesite.Themeansoftransport isthesameasthatdescribed inresponsetoCriterion (1).Provisions areprovidedtoestimatetheextentofcoredamagebaseduponbothradionuclide concentrations andotherphysicalparameters.
Theinterimprocedure forcoredamageassessment
,usingonlyradionuclide dataisattached.,
Thecomprehensive procedure baseduponallavailable plantdataisinpreparation andwillbeprovidedbythescheduled initialcriticality oftheSt.LucieUnit2reactor.Thecomprehensive procedure will.bebasedupontheparameters ofreactorcoolantandcontainment
atmosphere hydrogenconcentration, coreexitthermocouple temperature, andcontainment doseratesinadditiontotheradionuclide data..(2b)Therearetwoprovision providedtoanalyzethecontainment buildingatmosphere forhydrogencontent.ThefirstistheContainment HydrogenAnalyzerSubsystems.
Thissubsystem isdescribed indetailinSection6.2.5.2.1 oftheFSAR.Tworedundant subsystems areprovidedconsisting ofthesampleandreturnpiping,associated valves,hydrogenanalyzer, grabsamplecylinder, samplepump,moistureseparator, cooler,instruments, calibration gaslineandreagentgasline.Thesubsystems havethecapability toobtainsamplesfromsevenlocations withinthecontainment building.
Thesubsystem valvesandpipingaredesignedandfabricated inaccordance withASMESection.III,Class2andN-stamped, theinstrumentation isClasslEinaccordance withtheIEEEstandards.
Thesubsystem isdesignedwithitsownbackupgrabsamplecapability.
Thesecondprovision isgrabsampleanalysisfromthePASS.ThePASSprovidesameanstoobtaindilutedsamplesofthecontainment atmosphere.
Themeansforhandlingthesegrabsamplesisdescribed inresponsetoCriterion (1).ThegrabsamplesobtainedfromeithertheContainment HydrogenAnalyzerSubsystem orthePASScanbeanalyzedbythetechnique ofgaspartitioning intheRadiochemistry SampleRoom.(2c)ThePASSprovidesthemeanstoperformon-linemeasurement ofreactorcoolanttotaldissolved gas,hydrogenandoxygenoffgas, dissolved oxygenconcentration, pH,andboronconcentration.
'hePASSisdescribed inSection9.3.6oftheFSAR.Theprovisions toprovidechlorideanalysisisprovidedinresponsetoCriterion (5)below=.Therangeofchemicalanalysiscapability isasfollows:(1)Totaldissolved gas(2)Hydrogenoffgas(3)Oxygenoffgas(4)Dissolved oxygen(5)Boron(6)pH0to2000cc/kg0to1005ofT.D.G.0to25$ofT.D.G.0to20ppm0to5000ppm3to12(2d)AsstatedintheresponsetoCriterion 2(c)thePASSemployson-lineinstrumentation forchemistry analysis.
Demonstration oftheapplicability oftheselectedon-lineinstrumentation isshownthroughtesting.undertheanticipated radiation environment forpost-accident use.Adetaileddescription ofthePASSinstrumentation andoftheapplicability testprogramisprovidedinareportpreviously issuedtotheHRCChemicalEngineering Branch.Thisreportisentitled"Engineering Evaluation AndFunctional TestingForTheC-EPASSComponents AndInstrumentation",
CEN-229(L)-P datedNovember1982,preparedbyCombustion Engineering, Inc.Particular attention isprovidedinthesubjectreportconcerning applicability ofthePASSboronmetertoanalyzecontainment buildingsumpsamplesinthepresenceofpHcontroladditives.
Specifictestingwasperformed toverifythisperformance.
Adetaileddescription ofthattestprogramisprovidedasAppendixIIofthesubjectreport.
Criterion:
~~(3)Reactorcoolantandcontainment atmosphere samplingduringpostaccidentconditions shallnotrequireanisolatedauxiliary system(e.g.,theletdownsystem,reactorwatercleanupsystem(RMCUS))tobeplacedinoperation inordertousethesamplingsystem.Response:
ThePASScontainsallvalves,samplevessels,pumpsandheatexchangers necessary toprocess'eactor coolantandcontain-mentatmosphere samplesduringpostaccidentconditions.
ThePASSreturnsallsampleflowtocontainment toprecludeun-necessary contamination ofauxiliary systemsandtoensurethathighlevelwasteremainsisolatedwithinthecontainment.
ThePASSdrawsreactorcoolantsamplesfromtheReactorCool-antSystem(RCS)hotlegwhenRCSpressureisbetween200psig,.and2485psig,orfromaLowPressureSafetyInjection (LPSI)pumpwhenRCSpressureislowerthan200psig.ThePASSdrawscontainment samplesviacontainment atmosphere samplinglines.ThePASShascompletesampleprocessing capabilities andhassamplelinesthatarenotsharedwithnororiginiating fromanisolatedauxiliary system.PipingandInstrumentation diagrams'or thePASSareprovidedinFigures9.3-6a,9.3-6b,and9.3-6coftheFSAR.Therefore, reactorcoolantandcontainment atmos-pheresamplingdonotrequireanisolatedauxiliary systembeplacedinoperation inordertosamplewiththePASS.Valveswhicharenotaccessible afteranaccidentareenvironmentally qualified fortheconditions inwhichtheymustoperate.Criterion:
(4)Pressurized reactorcoolantsamplesarenotrequiredifthelicenseecanquantifytheamountofdissolved gaseswithun-pressurized reactorcoolantsamples.Themeasurement ofeither II totaldissolved gasesorH2gasinreactorcoolantsamplesisconsidered adequate.
Measuring the02concentration isrecommended, butisnotmandatory.
Response
ThePASSprovidesaremotecapability toobtainapressurized reactorcoolantsampleandquantifyboththeamountoftotaldissolved gasinthecoolantandthehydrogenandoxygencomposition ofthatgas.ThePASSalsoprovidesthecapability toreasurethedissolved oxygenconcentration belowsaturation intherangeof0to20ppm.Themethodusedtomeasureandanalyzethegasisasfollows.AsampleoftheReactorCoolantSystemisinitiated byopeningsystemisolation valves(including containment isolation.
valvesusingCIASoverride, ifnecessary) andpurgingareactorcoolantsample.throughthePASSsamplevessel/heat exchanger, whereitiscooled,throughathrottlevalvetoreducethepressure, throughthein-linechemistry analysise'quipment, tothereactorcoolantdraintank.Atreactorcoolantpressures lessthan200psig,containment sumpsampleflowispurged'nthesamemannerusingtheLPSIpumpdischarge connection.
Aftersufficient purging,apressurized sampleisthencollected byisolating thesamplevessel/heat exchanger.
Totaldissolved gasconcentration isdetermined bydegassing thesample.Thisisaccomplished byde-pressurization andcirculation byalternate operation oftheburetteisolation valveandthesamplecirculation pump.Theresulting displacement ofliquidintotheburetteisusedtocalculate thedissolved gasconcentration.
Thecollected gases,whichhavebeentrippedfromtheliquid,arethendirectedthrough
afloatvalveformoistureseparation andcirculated throughhydrogenandoxygenanalyzers.
TheH2analyzerisathermalconducitivity devidethatdetermines andindicates thevolu~epercentofH2presentinthegasremovedfromtheliquidsample.The0analyzerisapara-magnetic devicethatdetermines andindicates thevolumepercentof02presentinthegastakenoutof,theliquidsample.Afterrecording thehydrogenandoxygengasconcentrations, thegassamplevessel,whichcontainsnitrogen, isplacedonlinetodilutethegasvolume.Thisdilutionoperation reducestheradiation levelssuchthatasamplecanbedrawnfromthegassamplevesselbyinjection ofasyringethroughaseptumplugmountedinthevessel.Thissamplecanbetransferred tothesitelaboratory forsubsequent radioisotope andbackupgasquantifi-cation.Priortosamplewithdrawal, additional
- dilution, whichmay.benecessary for'hisquantification, maybeperformed byfurthernitrogenaddition, circulation andveniing.Thegaseousmeasurement portionsofthesystemareflushedwithdemineralized waterandpurgedwithN2toreducepersonnel exposureduringwithdrawal ofthesampleandtoreducecontamination plateoutbetweensamples.Thedissolved ox'ygenconcentration, belowthesaturation levelfordepressurized reactorcoolant,ismeasuredusingaOrbisphere polarographic instrument.
Thisinstrument operatesintherangeof0to20ppm.Areactorcoolantsampleispurgedthroughthesystemforanalysis.
Thesampleisdepressurized, cooled,andthetotalgasisevolveddowntosaturation levelsfromthesampleduringdepressurization.
Theevolvedgas,ifany,isseparated andreturnedtothecontainment building.
'l Theprocessed reactorcoolantisthenpurgedthroughthein-linedissolved oxygenanalyzerformeasurement.
1Criterion:
(5)Thetimeforachlorideanalysistobeperformed isdependent upontwofactors:(a)iftheplant'scoolantwaterisseawaterorbrackishwaterand(b)ifthereisonlyasinglebarrierbetweenprimarycontainment systemsandthecoolingwater.Underbothoftheaboveconditions thelicenseeshallprovideforachlorideanalysiswithin24hoursof-thesamplebeingtaken.Forallothercases,thelicenseeshallprovidefortheanalysistobecompleted within4days.Thechlorideanalysisdoesnothavetobedoneonsite.Response:
Afourstepprocessisusedintheanalysisofreactorcoolantforchlorides.
Thesefourstepsare:(1)initialanalysisofadilutedgrabsampleforchlorideconcentration, (2)measurement ofreactorcoolantdissolved oxygenconcentration intherangeof0to20ppmusingon-lineinstrumentation, (3)collection ofanundiluted grabsampleintheshieldedGrabSampleFacilitywithretention foranalysiswithin30daysconsistent withALARA,and(4)verification thatdissolved oxygenislessthanorequalto0.1ppmbymeasurement ofadissolved hydrogenresidualofgreaterthanorequalto10cc/kg.Theinitialgrabsampleforchlorides isobtainedusingthePASSwithsampledilutionofafactorof1000.Thissampleistransported totheRadiochemistry SampleRoomforchlorideanalysisusingthemercuricnitratemanualtitration technique.
Thecapability toperformchlorideanalysisofgrabsamplesusinglowchromotography isplannedforthefuturebutwillnotbe available atthetimeofinitialreactorcriticality.
Thedissolved oxygenconcentration ismeasuredbythePASSusinganOrbisphere dissolved oxygenanalyzer.
Themeasure-mentismadeon-linewithaninstrument rangeof0to20ppmonanundiluted depressurized reactorcoolantsample.Thismeasurement isdescribed inresponsetoCriterion (4)above.Theundiluted grabsampleiscollected usingtheshieldedgrabsamplefacility.
Theprocedures foroperating andtransporting thisdevicearedescribed inresponsetoCriterion (1)above.Theundiluted sampleisstoredintheshieldedgrabsamplefacilityuntilthedoseratesfromthesamplehavedroppedsufficiently toCallowanalysisconsistent withALARA.Verification oflowoxygenconcentration ipthereactorcoolantbymeasuring theresidualhydrogenconcentration isperformed, usingthePASSasdescribed inresponsetoCriterion (4):Criterion:
(6)Thedesignbasisforplantequipment forreactorcoolantandcontainment atmosphere samplingandanalysismustassumethatitispossibletoobtainandanalyzeasamplewithoutradiation exposur'es toanyindividual exceeding thecriteriaofGDC19(Appendix A,10CFRPart50)(i.e.,5remwholebody,75remextremities).
(Notethatthedesignandoperational reviewcriterion waschangedfromtheoperational limitsof10CFRPart20(NUREG-0578) totheGDC19criterion (October30,1979letterfromH.R.Dentontoalllicensees)),
Response
ThePASSperformsthechemistry analysisforboron,pH,totaldissolved gas,hydrogenandoxygenoffgas,anddissolved oxygenusingremoteoperation ofon-lineinstrumentation.
Thetimerequiredtoperformtheseanalysesislessthanthreehours.
AsshowninFigure12.3A-2oftheFSARthedoserateinthePASSLaboratory following aplantaccidentconsistent withtheRegulatory Guide1.4sourcetermsislessthan15mr/hr.Therefore, itisanticipated thatthepersonnel doseobtainedduringthesesampleprocedures islessthan45mrem.Theinitialscopinganalysisforreactorcoolantchlorideanalysisrequiresadilutedgrabsample.TheattachedFigure1providesthedoserat'escalculated forasyringesampleobtained2hoursfollowing anaccidentconsistent withtheRegulatory Guide1.4sourcetermassumptions.
Forchlorideanalysisthegrabsampledilutionistakenatafactorof1000.Thedoserateforthiscaseis450mrem/hrfrom.a2.5ccsampletotheextremities ofanoperatorholdingthesyringe.Forchlorides alargersampleisrequired.
Therequiredsampleis25cc.There-fore,theextremity
.doseratefromthissampleis4.5R/hr.Thetimerequiredtohandlethesampleduringchlorideanalysisisamaximumof15minutes.Theresulting integrated extremity doseis1.125Rem.Thisiswellbelowthe10CFRPart50GDC19criteriaof75Remtotheextremities.
TheshieldedGrabSampleFacilityisdesignedtocollectandretaina75ccundiluted sampleofthereactorcoolantliquid.Thedoseratescalculated fortheGrabSampleFacilityassumingaRegulatory Guide1.4sourcetermwithnocredittakenfordecayare76mrem/hratfourfeetfromtheGrabSampleFacilityand4.6Rem/hratthevalvehandwheels andquickdisconnects.
Thetime,requiredforanoperatortooperatethevalvesanddisconnects isapproximately 2minutes.Therefore, theoperatorextremity doesduringcollection ofanundiluted sampleis150mrem.Thisiswellbelowthe10CFRPart50GDC19criteriaof75Remtotheextremitites.
Aseparateshieldwallisprovidedtoreduce
~~I,~FijjteILiquidSample,2.5ml-syringe10~I~!III-I~~~~~I~~~<.~I.I:I~:II~-.~~~~~~~I~~~~~~~~~~~~t\~~~~~~~~~<<~~~~,,~1~~II~10t--~:t--.-~i-WW-f-.I--9~~I~-~<~~~I~~I~-~I--I~~-I~I~~<~f~I1~~~~j~i~~~<t<~t~4~~IiI'i--f-.-j..f.IL~~~~~~~I'~~~iI~~~~~~~~I'~~~~~-fI~~~~~~~~tI'"t0-r'1<'<"~~"!-,I<~IIII~~I"tI~~7.I..~I~.~~I~"~--I~~,j~tt~~I~~-~tN:.:.:i:::
'~.'..'..'..i~<~~=-:III:'e~I~~~~II~~~~I~~0.01~'~~~I~I~:i'j~jI~.g<~~I;.':..-;:-:}:
IGI"T.-1.4l:-Relet2Itr;.'Ise[~Itl0.01t0i56I89)0.1t34567891.0t3456169=1250:1=2500:1.{c)F=5000:1.(d)F=10,000:1SpecificActivity(Degassed Liquid)(Ci/cc)
Attachment (1)to,S-CE-~Fiure2OffgassSample,2.5mlsyringee~Ll~I'II10~IIII'~~c"I6IIIClOlD~51.0C~~~~~~~.--~~-w~I~8~~~~-4~~~$20.10.01~4562690.1561891.0554567c(dF=22:1F=35:1F=60'1F=100:1SpecificActivity{Offgas)*
(Ci/CC)*Noble/halogen gasactivityperunitvolumetotal'gases
~~~P~Fiure3Containment Atmosphere Sample,2.5mlsyringe)00~~II~~I100I~I;~I~~'I'II~~II~I1096II~'I~5II~~~~~~v<~ZIII~~~~i~J~~1~ev~~~e~~~d~>e~e='=10034"661691000~I456Z6910,00063i56)3100,0."'.
(a)2oo:1(5)5oo:1(C)F=1200:1SpecificActivity(Containment Atmosphere)
(qci/cc) wholebodyexposureduringsamplecollection to15mrem/hr.Forbackupchemistry analysisandforradiochemistry analysisusingdilutedgrab.samplesthedoseratescalculated areshown-inFi,gures1,2,and3attached.
Theanticipated valuesoncontacttothesamplesyringestwohoursfollowing anaccidentyieldingRegulatory Guide1.4sourcetermsareasfollows:360mrem/hrforadepressurized reactorcoolantsample,600mrem/hr.forareactorcoolantgassample,and15mrem/hrforacontainment atmosphere sample.Thesevaluesareobtainedfromthefiguresusingtheanticipated dilutionfactors.Ineachcasethesamplecontactdoseratesaresufficiently lowtoensurethatthe10CFR50GDC19dosecriteriawillbemaintained, AsshowninFigure12.3A-7twoalternate routesforaccesstothePASSLaboratory areavailable.
Themaximumdosereceivedusingthepreferred routeisapproximately 1mrem.Themaximumdosereceivedusingthealternate routeis750mrem.Ineachcasetransittimethroughtheradiation zonesareapproximately 30seconds.Criterion:
(7)TheanalysisofprimarycoolantsamplesforboronisrequiredforPWRs.(NotethatRev.2ofRegulatory Guide1.97specifies theneedforprimarycoolantboronanalysiscapability atBHRplants).Response:
ThePASSprovidesthecapability toperforminlineboronanalysis, inadditionthePASSprovidesthecapability ofobtaining dilutedandundiluted grabsamplesforbackupboron,analysis.
Adetaileddescription oftheon-lineboronanalyzerisprovidedinareportpreviously transmitted totheNRC,CEB.ThisreportisCEN-229(L)-P, "Engineering Evaluation AndFunctional TestingForTheC-EPASSComponents AndInstrumentation" datedNovember1982.Thisreportalsodescribes testingdonetodemonstrate performance oftheboronmeterinaradiation environment andtodemonstrate accuracyinanalysisofbothreactorcoolantandcontainment sumpwaterwithpHcontroladditives.
Criterion:
(8)Ifinlinemonitoring isusedforanysamplingandanalytical capability specified herein,.thelicenseeshallprovideback-upsamplingthroughgrabsamples,andshalldemonstrate thecapability ofanalyzing thesamples.Established planningforanalysisatoffsitefacilities isacceptable.
Equipment providedforbackupsamplingshallbecapableofproviding atleastonesampleperdayfor7daysfollowing onsetoftheaccident, andatleastonesampleperweekuntiltheaccidentcondition nolongerexists.Response:
Thecapabilities ofthePASSsystemtoprovidebackupsamplingthroughgrabsampleswasdiscussed inconjunction withgrabsamplingcapabilities intheresponsetoCriterion 1.ThePASSprovidesadepressurized grabsamplefacilitywithleadshielding forundiluted samplesandmultipledilutioncapability fordilutedsamplescollected viasyringe.ThePASSprovidesthefollowing backupgrabsamplecapability:
1)undiluted reactorcoolant,2)dilutedreactorcoolant,3)dilutedreactorcoolantoffgasand4)dilutedcontainment atmosphere gas.
Theundiluted reactorcoolantsampleisobtainedviatheGrabSampling.
Facility(seeresponsetoCriterion 1fordescription).
Thedilutedsamplesareobtainedthroughseptumplugslocatedbehindasmallpenetration intheshieldwallus-ingasyringeforsamplewithdrawal.
Allgassamplesaredilutedbeforewithdrawal forthepurposeofradiation protection.
Althoughitispossibletoobtainundiluted gassamples,radiation protection isensuredbyprocedures andmechanical arrangements whichdeliberately'iscriminate againstpossiblea'ccidental exposuretoundiluted radioactive gas.Theequipment providedforbackupsamplingiscapableofproviding atleastonesampleper,dayforanunlimited periodfollowing anaccident.
Grabsamplesareprovidedasbackuptothein-lineanalyzers usedbythePASSformeasurement ofhydrogengas,oxygengas,pHandboron.Theanalysisofhydrogenandoxygengasgrabsamplesisperformed usingaFoxboroGasPartitioner locatedintheRadiochemistry SampleRoom.Thegaspartitioner isequipedwithasupplysystemdesignedtoacceptthesampledirectlyfromthesyringeusedtoremovethesamplefromthePASS.Theanalysisofboronisperformed usingmanualMannitolTitration ona0.15mlsample.Thecapability toperformboronanalysisusingIOI'lchromatography isplannedinthefuture.TheanalysisforpHwillbeperformed withundiluted samplesatsuchtimefollowing theaccidentthatisconsistent withALARA.Criterion'.
(9)Thelicensee's radiological andchemicalsampleanalysiscapability shallincludeprovisions to:
(a)Identifyandquantifytheisotopesofthenuclidecatego.ies discussed abovetolevelscorresponding tothesourcetermsgiveninRegulatory Guide1.3or1.4and1.7.'here necessary andpracticable, theabilitytodilutesamplestoprovidecapability formeasurement andreduction ofpersonnel exposureshouldbeprovided.
Sensitivity ofonsiteliquidsampleanalysiscapability shouldbesuchastopermitmeasurement ofnuclideconcentration intherangefromapproximately lx10Ci/gto10Ci/g.(b)Restrictbackground levelsofradiation intheradiological andchemicalanalysisfacilityfromsourcessuchthatthesampleanalysiswillprovideresultswithacceptably smallerror(approximately afactorof2).Thiscanbeaccomplished throughtheuseofsufficient shielding aroundsamplesandoutsidesources,andbytheuseofventilation systemdesignwhichwillcontrolthepresenceofairborneradioactivity.
Response
(ga)ThePASSprovidesthecapability toobtaindilutesamplesforthepurposeofidentifying andquantifying theisotopespresentinthereactorcoolantandcontainment buildingatmosphere samples.Theresponses toCriterion 1,6,and8describes thePASSprovisions forhandlinggrabsamples.ThePASSprovidesthecapability toobtainthefollowing grabsamples:(1)undiluted, depressurized, cooledreactorcoolantliquid,(2)diluteddepressurized cooledreactorcoolantliquid,(3)diluted,depressurized cooledoffgasfromthereactorcoolant,and(4)dilutedcontainment buildingatmosphere.
Thelocations fromwhichthesesamplesamybeobtainedincludethereactor coolantsystemhotleg,thecontainment buildingsump,andthecontainment buildingatmosphere.
IneachcasethePASSprovidesthemeanstocontinuously varythegrabsampledilutionfactortosuittheneedsoftheanalysis.
(gbThegrabsampleswillbeanalyzedintheRadiochemistry SampleRoomusingsemiconductor detectors withmultichannel analyzers.
Predicted specificactivityofthesamplesarebaseduponRegulatory Guide1.4and1.7assumptions.
TheFigures1through3providedinresponsetoCriterion 6indicatethepredicted grossspecificactivityandcorresponding doseratesforgrabsampleanalysis.
Thesemiconductor detectors willbecalibrated topermitmeasurement ofnuclideconcentration intherangeoflxl0Ci/gto10Ci/g.)Theeffectsofbackground radiation onsampleradiochemistry analysisisreducedthroughtheuseofleadshielding aroundthesamplechamber.Abackground countratewillberecordedpriortosampleanalysis.
Asabackup,shouldthebackground radiation levelsintheReactorAuxiliary Buildingexceedthecapabilities oftheshielding, thesamplescanbetransported totheradio-chemistry laboratory attheSt.LucieUnit1plant.St.LucieUnit1hasredundant analysisequipment tothatprovidedintheUnit2plant.Thetwoplantsareadjacentandtransport ofthesampleswouldnotrequirethemtoberemovedfromthesite.Themeansof-transport isthesameasthatdescribed inresponsetoCriterion (1).Criterion:
(10)Accuracy, range,andsensitivity shallbeadequatetoprovidepertinent datatotheoperatorinorderto'describe radiolo-gicalandchemicalstatusofthereactorcoolantsystems.
Response
Instrumentation accuracies andrangesrequirements fortheboron,hydrogen, oxygenandpHmetersareprovidedinSystemdescrip-tionsectionofthePASStechnical manual.Theaccuracyandrangeoftheboronmeteris+21and0-5000ppmboron,respecti-vely.Theaccuracyandrangesofthehydrogenmeterare+2K-..and0-10ÃbyvolumeH2and0-100ÃbyvolumeH2,respectively.
Theaccuracyandrangesoftheoxygenmeterare+2<and0-5%byvolume0and0-24Kbyvolume02.TheaccuracyandrangeofthepHmeterare+.3pHunitsand3-12pHunits.Thesevaluesarestatedundernormalenvironmental conditions.
Demonstration oftheapplicability andaccuracyoftheselectedon-lineinstrumentation underpostaccidentenvironmental conditions isshownthroughtestingundertheanticipated radiation environment consistent withRegulatory Guide1.4sourceterms.Theresultsofthistestingaredescribed inarportpreviously providedtotheNRC.ThisreportisCEN-229(L)-P "Engineering Evaluation AndFunctional TestingForTheC-EPASSComponents AndInstrumentation" datedtlovember 1982.ThisreportwaspreparedbyCombustion Engineering, Inc.Withregardtopersonnel trainingandfamiliarity withthePASSequipment andprocedures, allFPRLChemistry Department technicians willbetrainedbothintheclassroom andinactualhands-onoperations, asafunctionoftheChemistry Department trainingprogram.Operating procedures willbedeveloped andtheywillbeconsistent withtherecommendations ofthePASSsupplier(Combustion Engineering).
Combustion Engineering issupplying videotapedrefresher trainingprograms-tocover"bothPASSCalibration andMaintenance, andOperations andPostAccidentChemistry'.
Criterion:
(ll)Inthedesignofthepostaccidentsamplingandanalysiscapability, consideration shouldbegiventothefollowing items:(a)Provisions forpurgingsamplelines,forreducingplateoutinsamplelines,forminimizing samplelossordistortion, forpreventing blockageofsamplelinesbyloosematerialintheRCSorcontainment, forappropriate disposalofthesamples,andforflowrestrictions tolimitreactorcoolantlossfromaruptureofthesampleline.Thepostaccidentreactorcoolantandcontainment atmosphere samplesshouldberepresentative ofthereactorcoolantinthecoreareaandthecontainment atmosphere following atransient oraccident.
Thesamplelinesshouldbeasshortaspossibletominimizethevolumeoffluidtobetakenfromcontainment.
Theresiduesofsamplecollection shouldbereturnedtocontainment ortoaclosedsystem.(b)Theventilation exhaustfromthesamplingstationshouldbefilteredwithcharcoalabsorbers andhigh-efficiency particulate air(HEPA)filters.Response:
(lla)ThedesignofthePASSincludesmanyfeatureswhichservetomaintainsampleintegrity andlimitradiological ex-posureorrelease.Manyofthesefeatureswereexplained inresponsetoearlierquestions, namelydilutioncapabilities, operability independence withrespecttoisolatedauxiliary
.systems,sampledisposalviareturning sampletocontainment
~'FI therebyprecluding unnecessary contamination ofexternalenvironments andremotecalibration samplingandpurgingcapabilities.
ThePASSprovidesadditional featureswhichservetomaintainsampleintegrity andlimitradiological exposureorrelease.Pipinglengthsarekeptasshortaspossiblethuslimitingplatoutinsamplelines.Pipediameterdownstream ofexis'ting samplepathsis1/2"to3/8"thusproviding highvelocityturbulent sampleandpurgeflowatachievable flowrates.SampleandpurgeflowvelocityandReynoldsnumberforthereactorcooloutsampleattherecommended flowrateof1gpmareoftheorderof1.5ft/secand10,respectively.
Samplepurgeandsamplevelocityforthecontain-mentatmosphere'sample atrecommended flowratesare7.5to10ft/secand1.5ft/sec,respectively.
Astrainerupstreamofthesamplevesselheatexchangeer isdesignedtoremoveinsoluble particles whichmaycausesamplestationchemistry instrumentation tobecomeplug-'et.Thestrainercanbebackflushed, withdemineralized waterremotelybyoperation ofvalvesatthecontrolpanel.(lib)ThePASScabinetisequippedwithlouverssizedtopassupto333scfmofairflowfromthesurrounding roomtotheventilation systemexhauseconnection intheupperportionoftheenclosure.
Airflowisroutedthroughcharcoalabsorbers.
Thisairflowprecludes anybuildupofradioactive gasorhydrogengasandprovidesforremovalofheatgenerated byinternalcomponents.