ML17244A373: Difference between revisions

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==DearMr.Ziemann:==
==DearMr.Ziemann:==
Theinformationinthisletterisbeingprovidedinresponsetoarequestfromamemberofyourstaffrelativetotheactuationlogicforthe1CSafetyInjectionPump.Thelogicschemeforthispumpissuchthatitcanbeautomaticallytiedtoeithersafeguardsbus14or16,thetworedundantsourcesofemergencyonsitepower.However,nosinglefailurecancauseparalleloperationofthetworedundantbuses,orcausebothbusestoberenderedinoperable.1)ActuationlogicforthelA,1B,and1Cpumpsisshownonelementarywiringdiagrams10905-73,10905-74,and10905-75,whichwereincludedinacomprehensivepackageofGinnaelectricaldrawingstransmittedtoyouonNovember22,1978;2)Thearrangementandactuationlogicforpump'1Cisessentiallythis:whenasafetyinjectionsignalisgenerated,Agastattimer2/SIP1C2automaticallytiesSIpump1Ctobus14after5secondsbyclosingbreaker52/SIP1C2.Anormallyclosedcontact(b)offbreaker52/SIPlC2openswhenthebreakercloses.Theopeningofthiscontactwillprevent.breaker52/SIPlCl,whichwouldenergizeSIpump1Cfromsafeguardsbus16,fromclosing.IfAgastattimer2/SIPlC2failed,anotherredundanttimer2/SIP1Cl,wouldtiePump1Ctobus16byclosingbreaker52/SIP1C1afteranadditional2seconds.Anormallyclosedcontact(b)off52/SIP1C1wouldopenwhenthisbreakerclosed,thusfurtherensuringVBOKZ%0(CtO gC'p4P%w4 rI4~ROCHESTERCASANDELECTRICCORP.DATEFebruary13,1979ToDirectorofNuclearReactorRegulationSHEETNO.2thatPump1Ccouldnotbetiedtobus14.Thisarrangementmeetsseparationandsinglefailurecriteria,sinceitwouldrequirethesimultaneousfailureofabreakerandatimingrelay(Agastat)totiebuses14and16togetherthroughSIPump1C.Verytrulyyours,  
Theinformationinthisletterisbeingprovidedinresponsetoarequestfromamemberofyourstaffrelativetotheactuationlogicforthe1CSafetyInjectionPump.Thelogicschemeforthispumpissuchthatitcanbeautomaticallytiedtoeithersafeguardsbus14or16,thetworedundantsourcesofemergencyonsitepower.However,nosinglefailurecancauseparalleloperationofthetworedundantbuses,orcausebothbusestoberenderedinoperable.1)ActuationlogicforthelA,1B,and1Cpumpsisshownonelementarywiringdiagrams10905-73,10905-74,and10905-75,whichwereincludedinacomprehensivepackageofGinnaelectricaldrawingstransmittedtoyouonNovember22,1978;2)Thearrangementandactuationlogicforpump'1Cisessentiallythis:whenasafetyinjectionsignalisgenerated,Agastattimer2/SIP1C2automaticallytiesSIpump1Ctobus14after5secondsbyclosingbreaker52/SIP1C2.Anormallyclosedcontact(b)offbreaker52/SIPlC2openswhenthebreakercloses.Theopeningofthiscontactwillprevent.breaker52/SIPlCl,whichwouldenergizeSIpump1Cfromsafeguardsbus16,fromclosing.IfAgastattimer2/SIPlC2failed,anotherredundanttimer2/SIP1Cl,wouldtiePump1Ctobus16byclosingbreaker52/SIP1C1afteranadditional2seconds.Anormallyclosedcontact(b)off52/SIP1C1wouldopenwhenthisbreakerclosed,thusfurtherensuringVBOKZ%0(CtO gC'p4P%w4 rI4~ROCHESTERCASANDELECTRICCORP.DATEFebruary13,1979ToDirectorofNuclearReactorRegulationSHEETNO.2thatPump1Ccouldnotbetiedtobus14.Thisarrangementmeetsseparationandsinglefailurecriteria,sinceitwouldrequirethesimultaneousfailureofabreakerandatimingrelay(Agastat)totiebuses14and16togetherthroughSIPump1C.Verytrulyyours,}}
}}

Revision as of 15:41, 18 May 2018

Forwards Info Re Arrangement & Actuation Logic for 1C Safety Injection Pump.Reports That Logic Arrangement Meets Separation & Single Failure Criteria
ML17244A373
Person / Time
Site: Ginna Constellation icon.png
Issue date: 02/13/1979
From: WHITE L D
ROCHESTER GAS & ELECTRIC CORP.
To: ZIEMANN D L
Office of Nuclear Reactor Regulation
References
TASK-06-07.A3, TASK-06-07.C1, TASK-6-7.A3, TASK-6-7.C1, TASK-RR NUDOCS 7902210190
Download: ML17244A373 (5)


Text

BEGULAT(INFORMATION.DISTRIBUTIONSTEM(BIDS)i.ACCESSIONNBBi7902210190DOC.DATE<79/02/I3NOTARIZED~NODOCKETiI'ACIL!50-244RobertEmmetGinnaNucl,earPowerPlant,Unit'I,Roches05000244AUTH.NAMEAUTHORAFFILIATIONWITE,L.D.RochesterGas8ElectricCorp.RECI.P-NAMERECIPIENTAFFILIATI.ONZIEMANN,D.L..OpevatingRectoryBranch2

SUBJECT:

Forwardsinforearrangement8,actuationlogicforICSafety0In)ectionPump.Reportsthatlogicarrangementmeetsseparation8.singlefailurecriteria.DISTRIBUTIONCODE~AOOISCOPIFSRECEIVED-'LTR~ENCL~SIZE>TITLE.~GENERALDISTRIBUTIONFORAFTERISSUANCEOFOPERATINGLICNOTES:t~~~~<<~~L.ACTIONSINTEBNAL~BEGIPIENTIDCODE/NAME05BCeg~~03GFILE1.215COBE.PERFBR17ENGRBR19.PLANTSYSBR21EFLTTRTSYSCOPIESLTTRENCLI2.II.I'EGIPIENTIDCODE/NAME02NRCPDR.14TA/EDOI6ADSYS/PROJ1.8REACSFTYBR20FEB22BRINKMANCOPIESLTTRENCLI.III.II'XTERNAL<03LPDR23ACBS,I,16I04NSICFEB'2RS7$TOTALNUMBEROFCOPIESREQUIBED!LTTB38ENCL38 pahl.kIh' RQCHES7ZRGAS4,'(0ELI=CTRICCORPOQ4TIO,'489"-4574V."=i'I(!8ROC'"S7""2,H.Y.146~9i.CONQ.WHITK.JR.VJCtPRC910!NTtg,yeagag~ogAgrotsic0<<6zi00February13,1979DirectorofNuclearReactorRegulationAttention:Mr.DennisL.Ziemann,ChiefOperatingReactorsBranchNo.2U.S.NuclearRegulatoryCommissionWashington,D.C.20555Sub'ect:SEPToicVII-7,"AccetabilitofSwinBusDesin"

DearMr.Ziemann:

Theinformationinthisletterisbeingprovidedinresponsetoarequestfromamemberofyourstaffrelativetotheactuationlogicforthe1CSafetyInjectionPump.Thelogicschemeforthispumpissuchthatitcanbeautomaticallytiedtoeithersafeguardsbus14or16,thetworedundantsourcesofemergencyonsitepower.However,nosinglefailurecancauseparalleloperationofthetworedundantbuses,orcausebothbusestoberenderedinoperable.1)ActuationlogicforthelA,1B,and1Cpumpsisshownonelementarywiringdiagrams10905-73,10905-74,and10905-75,whichwereincludedinacomprehensivepackageofGinnaelectricaldrawingstransmittedtoyouonNovember22,1978;2)Thearrangementandactuationlogicforpump'1Cisessentiallythis:whenasafetyinjectionsignalisgenerated,Agastattimer2/SIP1C2automaticallytiesSIpump1Ctobus14after5secondsbyclosingbreaker52/SIP1C2.Anormallyclosedcontact(b)offbreaker52/SIPlC2openswhenthebreakercloses.Theopeningofthiscontactwillprevent.breaker52/SIPlCl,whichwouldenergizeSIpump1Cfromsafeguardsbus16,fromclosing.IfAgastattimer2/SIPlC2failed,anotherredundanttimer2/SIP1Cl,wouldtiePump1Ctobus16byclosingbreaker52/SIP1C1afteranadditional2seconds.Anormallyclosedcontact(b)off52/SIP1C1wouldopenwhenthisbreakerclosed,thusfurtherensuringVBOKZ%0(CtO gC'p4P%w4 rI4~ROCHESTERCASANDELECTRICCORP.DATEFebruary13,1979ToDirectorofNuclearReactorRegulationSHEETNO.2thatPump1Ccouldnotbetiedtobus14.Thisarrangementmeetsseparationandsinglefailurecriteria,sinceitwouldrequirethesimultaneousfailureofabreakerandatimingrelay(Agastat)totiebuses14and16togetherthroughSIPump1C.Verytrulyyours,