ML17331A772

Forwards Info Re Engineering Description,Test Procedures, Background Info,Generic Operating Guidelines & Supporting Details for Reactor Vessel Head Vents,In Response to NUREG- 0737,Item II.B.1

ML17331A772
Person / Time
Site:	Cook
Issue date:	07/15/1981
From:	HUNTER R S INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	DENTON H R Office of Nuclear Reactor Regulation
Shared Package
ML17319A959	List: ML17319A958 ML17319A960 ML17319A961 ML17319A962 ML17319A963 ML17331A772
References
RTR-NUREG-0737, RTR-NUREG-737, TASK-2.B.1, TASK-TM AEP:NRC:0584, AEP:NRC:584, NUDOCS 8107210416
Download: ML17331A772 (9)

Text

ACCEREGULATORYNFORMATIONDISTRIBUTIONSYTEM(RNNBRNB107210416DOCIDS)FACILE:50'15DonaldC~CookN'4107/15NOTAR'xcKD)NO50316DonaldCCk.N,owerPlantiUnitfrIndianaS,p5H.NAME<AUTHORAFFILIATION:'gUnit2'zIndianeL05p00316HUNTERrR>>.S<IndianaLMichianDENTONO'oNIOfficeofNuclearReactor"RltieguaonrDirector~SUBJECT':."Forwardsinforeienginee'ring,describakodifodetailsfor=reactor"vesselecor"vesselheaventsrfnresponse,toNUREGDISTRIBUTIONCODE~)A046SCOPIKSRECElIVED:TITLES=Response>>toNURKG<<0737N:LiTRENCL]'IZE:'~'NUREG<<0660TMIActi'Pon'anRgmts'OL's)NOTESt-ILE'.3copies"al1materel~encopiesofallmatet'ialtoILK',0500031505000316"RECIPIENTID>>CODE'/NAMEIACTION$:ORB0fBC05>>INTERNAL>A/DCSC;SYS27A/D>>FOR<TECH32'.A/DLICENS>>16'/0OPREACT15>>A/D>>RADPROT26'EP'IRrDHFS29.DIRECTORS'EE2'1<DIRECTORS'Lt14DIRECTOR,DST30.EMRGPRPLICILEI12!ORASSESSBR18RAD'SMT'REXTERNALSACRSLPDR03>>>>VT'IS"COPIESI>>TTRENCL(7716161-111.RECIPIENTIDCODE/NAME'.02'1INPOrJEST'ARNESNSIC04A/DCSS'NG22'/DGENPROJ31A/DMLQENG23A/DPLANTSYS25A/DSAFETYAS17D.IR'rEM=PREP33DIRECTOR'pDHFS28DIRECTOR'gDSI24EMERGPREPDEVFKMA<<REPDIVOELDPDREGFCOPIKSLTTR>>ENCL<11=111111111.1>>l.1~1111=011f111,-)ak'g~gglTOTALNUMBERSOFCOPIESREQUIREDj-"LiTTR5ENCL I"'~<<rtlj4~jW.~'"fbi<<I0~IIIIlb'I4~kjbC<<l',',It'I~<<bIII<<I41lb<~ItIWgbI~'II"~'II"II<<14I<<II~IiW*~<<g~,I<<rtW'$4NWi'I'1<<<<WqjtWlttf'WCt<<1CqNC,tfI<<'IvpbII INDIANALMICHIGANELECTRICCOMPANYP.O.BOX18BOWLINGGREENSTATIONNEWYORK,N.Y.10004July15,1981AEP:NRC:0584DonaldC.CookNuclearPlantUnitNos.1and2DocketNos.50-315and50-316LicenseNos.DPR-58andDPR-74NUREG-0737;ITEMII.B.1-REACTORCOOLANTSYSTEMVENTSMr.HaroldR.Denton,DirectorOfficeofNuclearReactorRegulationU.S.NuclearRegulatoryCommissionWashington,D.C.20555

DearMr.Denton:

Thisletteranditsattachmentsdocumenttheengineeringdescription,testprocedures,backgroundinformation,genericoperatingguidelinesandsupportingdetailsforthereactorvesselheadventsbeinginstalledinbothUnitsoftheDonaldC.CookNuclearPlant.Morespecifically,theattachmentstothislettercontainthefollowinginformation:Attachment1:Abriefdescriptionofthedesign,operationandtestingrequirementsAttachment2:Attachment3:BackgroundInformationforPressurizerVentingOperation-Rev.0,datedMarch1981.sPressurizerVentingOperation-Rev.0,datedMarch1981.Attachment4:BackgroundInformationforReactorHeadVentOperation-Rev.0,,datedFebruary1981.Attachment5:ReactorVesselHeadVentOperation-Rev.0,datedFebruary1981.8107210416810715IPDRADQCK05000315PPDR(/(

-'TIJV>II)J' Mr.'aroldR.DentonAEP:NRC:0584Attachment6:ThefollowingSupportingInformationisattached:a)SuggestedTechnicalSpecifications.b)FlowDiagramoftheReactorHeadVentSystem(Figure1).c)d)FlowDiagramofthePressurizerVentSystem(Figure2).LogicDiagram(Figure3).e)ElementaryWiringDiagram6.FormalsubmittalofTechnical,Specifications'willtakeplaceonce,thesys-temdesignisfinalized.WestinghousereportWCAP-9600,"ReportonSmallBreakAccidentsforWestinghouseNSSSSystem",June1979,Section3.9hasbeenusedas.areferenceindevelopingthedesignoftheventsystem.ThisinformationisprovidedasrequestedinItemII.B.lofNUREG-0737.TheReactorCoolantSystemVentingSystemsattheCookPlantwillbeimplementedbytherequireddateofJuly1,1982.Verytrulyyours,.S.unterVicePresidentcc:JohnE.Dolan-ColumbusR.C.CallenG.CharnoffR.W.JurgensenD.V.Shaller-BridgmanJoeWilliams,Jr.RegionIIIResidentInspector-Bridgman fIl'I ATTACHMENT1TOAEP:NRC:05DescritionofDesinThereactorCoolantVentSystemiscomprisedoftheReactorHeadVentSystemandthePressurizerVentSystem.IthasbeendesignedtoventavolumeofHydrogenapproximatelyequaltoone-halfofthere-actorcoolantsystemvolumeinonehouratsystemdesignpressureandtemperature,Eachofthesesubsystemsconsistsoftwoparallelflowpaths.'."oneinchinsize,withredundantisolationvalvesineachflowpath.A3/8"orificehasbeeninstalledupstreamoftheisolationvalvestolimittheflowinthecaseofabreakdownstreamoftheorificestowithinthecapacityof;-onecentrifugalchargingpump.AbreakofanRCSVentLineupstreamof,theorificeswouldresultinasmallLOCAnotgreaterthan.oneinchindiameter.ThistypeofbreakhasbeenanalyzedinWCAP-9600(Reference1)andwouldbehavesimilarlytothehotlegbreakpresented.inthisreport.Thereforeabreakintheventlinewouldnotresultin.acalculatedcoreuncover.Alockedopenhandvalvewillbeinstalledupstreamofthe3/8"orifices.TheisolationvalvesareD.C.powered,failclosed,solenoidvalveswithstempositionswitches.Thesevalvescanbeoperatedfrom.'hecontrol.room..Theywillbeno@nallyclosedduringplantoperation.Indicating'hghtswillbeinstalledinthecontrolroomsotheoperatorswillknowtnevalveposition.ThesevalveswillbequalifiedtoIEEE-323-1974,IEEE-344-1975an'dIEEE-383-1972.RTDassemblieshavebeenaddeddownstreamofthesolenoidvalvestodetectleakagethroughthesevalves..TheseRTD"ssemblieswillsetoffanalarminthecontrolroomifleakagethroughthevalvesshouldoccur..Thereactorvesselheadventconnectstoapart-lengthcontrolroddrivemechanismhousinglocatednearthecenterofthereactorhead.Thepressurizerventisconnectedtothepressurizerreliefline.Thepossibilityofreactorcoolantpressureboundaryleakageisminimizedbecauseofthetwoisolationvalvesinseries.IsolationvalvesinoneflowpatharepoweredbyTrainAandthevalvesinthesecondflowpatharepoweredbyTrainB.Boththereactorheadventandthepressurizerventdischargeintotheuppervolumeofthe.containmentatapprox.elevation673'-0",inanareawhichwillprovideadequatedilutionofanycombustiblegas. Allpipingandequipmentusedinthereactorheadventfromthepart-lengthrodhousingtotheorificesandallpipingandequipmentusedinthepressurizerventfromthepressurizerreliefpipingtotheorificesaredesignedinaccordancewithASME,SectionIIIClass1requirements.FromtheorificesuptothefirstanchordownstreamofthesecondisolationvalvethepipingandequipmenthasbeendesignedinaccordancewithASMESectionIIIClass2requirements.TheremainderofthepipingisdesignedtoAEPSeismicClass1Level4.~TestinTheisolationvalvesusedonthereactorheadventandpressurizer-ventwillbetestedinaccordancewithsubsectionIWV-3000ofASMESectionXIforCategoryBvalvesduringrefuelingoutages.~OtalPdThefollowingproceduresareattachedandaregenericallyapplicabletotheD.C.CookPlant.1.BackgroundInformationfor'PressurizerVentingOperation-Rev.0datedMarch1981.2.PressurizerVentingOperation-Rev.0datedMarch1981.3.BackgroundInformationforReactorHeadVentOperation-Rev.0datedFebruary1981.4.ReactorVesselHeadVentOperation-Rev.0datedFebruary1981.References1.WCAP-9600,"ReportonSmallBreakAccidentsforWestinghouseNSSSSystem,"June1979,(specificallyCase.FSection3.2).

ATTACHMENTET0AEP:NRC:0584