ML17265A315

Proposed Tech Specs Basis Re Main Steam Isolation Setpoint

ML17265A315
Person / Time
Site:	Ginna
Issue date:	06/04/1998
From:	ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17265A313	List: ML17265A312 ML17265A315
References
NUDOCS 9806100267
Download: ML17265A315 (4)

Text

ESFASInstrumentationB3.3.2BASESAPPLICABLESAFETYANALYSES,LCO,andAPPLICABILITYc.SteamLineIsolation-ContainmentPressure-HihHih{continued)ContainmentPressure-HighHighmustbeOPERABLEinMODESI,2,and3,becausethereissufficientenergyintheprimaryandsecondarysidetopressurizethecontainmentfollowingapipebreak.Thiswouldcauseasignificantincreaseinthecontainmentpressure,thusallowingdetectionandclosureoftheMSIVs.'hesteamlineisolationFunctionmustbeOPERABLEinMODES2and3unlessbothMSIVsareclosedandde-activated..InMODES4,5,and6thesteamlineisolationFunctionisnotrequiredtobeOPERABLEbecausethereisnotenoughenergyintheprimaryandsecondarysidestopressurizethecontainmenttotheContainmentPressure-HighHighsetpoint.d.SteamLineIsolation-HihSteamFlowCoincidentWithSafetIn'ectionandCoincidentWithT,-LowThisFunctionprovidesclosureoftheMSIV~~tap>c-duringanSLBorinadvertentopenjggofGatmosphericrelieforsafetyvalv~omaintainatleastoneunfaultedSGasaheatsinkforthereactor,andtolimitthemassandenergyreleasetocontainment.~sp~gc4AOomoQLcValue<~a~4own~~hi~e~~Pc)~privyW~~Xou4~~~g~()oazpy'g)~R~%~~,R~~~~~+ime.)t~fog-rpg~c-~a+~(0(4P414~(Kf)~~~t~4~~s~~~lezi+~<8~~4%m~Qg~'g4ic~Q(~cL>>4~+'p~~~~~~~~K((p,o~~Ah~ca~hQ@oAi+<~tg~colLkpA.ug~g,u3ChLCM~~~i~~~i'll~~<~/~~~~~Q~~~~~~~'~M~~~~p~<~~~~~+~~~~~~~c&0.4t.a4~4m(~e+LbOK@sic'Lo~~pm<z~~~~~~X4~~~~pme~mg.~v~~a~i4~~P~4.,~~~%XI4.L~~~A\~rC,'Q+4O~~a~(continued)R.E.GinnaNuclearPowerPlantB3.3-82Revision69806i00267'F80604PDRADOCK05000244P'DR rgJ ESFASInstrumentationB3.3.2BASESAPPLICABLESAFETYANALYSES,LCO,andAPPLICABILITYd.SteamLineIsolation-HihSteamFlowCoincidentWithSafetInectionandCoincidentWi'thT-Low(continued)e.ThisFunctionmustbeOPERABLEinMODESI,2,and3whenasecondarysidebreakorstuckopenvalvecouldresultinrapiddepressurizationofthesteamlines.TheSteamLineIsolationFunctionisrequiredtobe,OPERABLEinMODES2and3unlessbothMSIVsareclosedandde-activated.ThisFunctionisnotrequiredtobeOPERABLEinMODES4,5,and6becausethereisinsufficientenergyinthesecondarysideoftheplanttohaveanaccident.SteamLineIsolation-HihHihSteamFlowCoincidentWithSafetIn'ectionThisFunctionprovidesclosureoftheIVsdurinateamlinebreaor>nartentopeninanSGatmoserrelicsafevalvoma)ntainateastoneunaultedSGasaeatsinkforthereactor,andtolimitthemassandenergyreleasetocontainmentTwosteamlineflowchannelspersteamlinearerequiredtobeOPERABLEforthisFunction.Thesearecombinedinaone-out-of-twologictoindicatehigh-highsteamflowinonesteamline.FT-464andFT-465arethetwochannelsrequiredforsteamlineA.FT-474andFT-475arethetwochannelsrequiredforsteamlineB.EachsteamlineisconsideredaseparatefunctionforthepurposeofthisLCO.Thesteamflowtransmittersprovidecontrolinputs,butthecontrolfunctioncannotinitiateeventsthattheFunctionactstomitigate.Therefore,additionalchannelsarenotrequiredtoaddresscontrolprotectioninact'icsuKk(n~~u~mi~+~~(D~rWw'g~(>0W'l4o~s,~uv.~~~vsm~~~M%+iv~.g~nn~E~~,~g~~M~3tgmo3.+mMmg.~m~uv-i.'~~~M~g('<,o~~~.v.~~'EQg~QLcW~~'~.h.~~4~~$~~~~Mt~4x&~~p~q~~jZ~u.~~~~~Q.7ll<~)~~7$Wpg'tg.S~~Q~~{o~k~~q~~~-'~~~(continued)p~~~-0R.E.GinnaNuclearPowerPlantB3.3-84Revision6 0'%laE.nS<'*fj"4