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{{#Wiki_filter:Attachment;ARemove3.1-4b3.1-4e3.5-3Insert3;1-4b3.1-4e3.1-4f3.5-38401250282840119,',"PDRADQCK05000244.,'"".PDR 3.1.1.5PressurizerWheneverthereactorisathotshutdownorcriticalthepressurizershallhaveatleast100kwofheatersoperableandawaterlevelmaintainedbetween10.6%and87%oflevelspan.Ifthepressurizerisinoperableduetoheaterorwaterlevel,restorethepressurizertooperablestatuswithin6hrs.orhavetheRHRsysteminoperationwithinanadditional6hrs.,Bases:TheplantisdesignedtooperatewithallreactorcoolantloopsinoperationandmaintaintheDNBRabove1.30duringallnormal3.1-4bChangeNo.ggAmendmentNo.gP,gg,jfg>PROPOSED TemperaturerequirementsforthesteamgeneratorcorrespondwithmeasuredNDTfortheshellandallowablethermalstressesinthetubesheet.Eachofthepressurizercodesafetyvalvesisdesignedtorelieve288,000lbs.perhr.ofsaturatedsteamatthevalvesetpoint.Below350Fand350psiginthereactorcoolantsystem,the0residualheatremovalsystemcanremovedecayheatandtherebyIIcontrolsyst'mtemperatureandpressure.Ifnoresidualheatwereremovedbyanyofthemeansavailable,theamountofsteamwhichcouldbegeneratedatsafetyvalvereliefpressurewouldbelessthanhalfthevalves'apacity.Onevalve,therefore,providesadequatedefenseagainstoverpressurization.Thepoweroperatedreliefvalves(PORVs)operatetorelieveRCSpressurebelowthesettingofthepressurizercodesafetyvalves.Thesereliefvalveshaveremotelyoperatedblockvalvestoprovideapositiveshutoffcapabilityshouldareliefvalvebecomeinoper-able.TheelectricalpowerforboththereliefvalvesandtheblockvalvesiscapableofbeingsuppliedfromanemergencypowersourcetoensuretheabilitytosealthispossibleRCSleakagepath.Therequirementthat100kwofpressurizerheatersandtheirassociatedcontrolsbecapableofbeingsuppliedelectricalpowerfromanemergencybusprovidesassurancethattheseheaterscanbeenergizedduring''ossofoffsitepowerconditiontomaintainnaturalcirculationathotshutdownandduring3.1-4eAmendmentNo.gP,gg,PROPOSED cooldown.Thepressurizerlowlevellimitof10.6%is"the(3)levelbelowwhichtheheatersarede-energizedtopreventdamage.References(1)FSARSection14.1.6(2)FSARSection7.2.3(3)LetterfromL.D.White,Jr.toD.L.Ziemann,USNRC,datedOctober17,19793.1-4fPROPOSED TABLE3.5-1INSTRUMENTOPERATIONCONDITIONSPage1of2NO.FUNCTIONALUNITNO.ofMIN.MIN.NO.ofCHANNELSOPERABLEDEGREEOFCHANNELSTOTRIP***CHANNELS'REDUNDANCYPERMISSIBLEBYPASSCGNDITIONS6OPERATORACTIONIFCONDITIONSOFCOLUMN3OR5CANNOTBEMET1.Manual2.NuclearFluxPowerRangelowsettinghighsetting3.NuclearFluxIntermediateRange222of4pawerrangechannelsgreaterthan8%F.P.(lawsettingonly)2of4powerrangechannelsgreaterthan8%F.P.MaintainhotshutdawnMaintainhotshutdawnMaintainhotshutdawn.Note14.NuclearFluxSourceRange5.OvertemperatureT1of2intermediateMaintainhotrangechygnelsgreatershutdown.Notethan10amps.=1Maintainhotshutdown6.Overpawer-TCOs7OQMgU~8.HiPressurizerPressureZawPressurizerPressureMaintainhotshutdawnMaintainhotshutdownMaintainhotshutdownPressurizer-HiWaterLevelMaintainhotshutdawnLawFlowinoneloop(>50%F.P.)LowFlowbothloops(10-50%F.P.)3/loop2/loop(anyloop)3/loop2/loop(anyloop)MaintainhotshutdownMaintainhotshutdown AttachmentBThecurrentspecificationonpressurizerwaterlevelstatesthatthepressurizerlevelshallbemaintainedbetween12and87%.Theupperlimitisbasedonahighleveltripsetpointwithsufficientmargintoaccountforreferencelegheatup.Thereisnobasisforthe12%lowerlimit.Sincelowpressurizerheatersarede-energizedat10.6%,amoreappropriatevaluewouldbe10.6%.TheP-10permissiveallowsmanualblockingoftheinter-mediaterangerodstop,theintermediaterangehighfluxtrip,andlowsetpointofthepowerrangehighfluxtripabove10%power.Thesetripsareusedtomitigatetheconsequencesofarodwith-drawaltransientfromsubcritical.TheproposedTechnicalSpecificationchangewouldallowtheabovetripstobebypassed(blocked)at8%power.ThischangeisnecessarybecauseP-7permissiveisrequiredat8.5%power.SinceoneoftheinputstoP-7comesfromthesamepowerrangebistablethatsuppliesP-10,P-10mustbeactuatedat8%powertosatisfy'.therequirementsforP-7.P-7automaticallyunblocksthefollow-.ingreactortrips:2looplowflow,reactorcoolantpumpbusundervoltage,reactorcoolantpumpbusunderfrequency,pressurizerlowpressure,andturbinetripwithP-9.Thesetripsareassociatedwiththe130MWwhichistheupperlimitofheatremovalwhileonnaturalcirculation.Theonlytransientanalysiswhichusesthistripisaslowrodwithdrawal.(Borondilutionisboundedbytheslowrodwithdrawal.)TheonlyeffectofreducingP-10to8%wouldbethatarodwithdrawalaccident(RWA)startingfrom8%wouldbeterminatedbyhighfluxandovertemperatureTversustheintermediateandreducedhighpowertrips.AnevaluationperformedontheRWAstartingfrom8%and10%forvariousreactivityinsertionratesshowsapproximatelythesameDNBRwhentheRWAisinitiatedfrom8%versus10%power.Further,thereissubstantialmarginbetweentheDNBRforaRWAfrom10%andthelimitingRWAfrom100%power.TheDNBRforaRWAstartingfrom8%willalsobegreaterthantheDNBRforthelimitingRWAstartedfrom100%power.Therefore,reducingP-10to8%hasnegligibleeffectontheGinnaSafetyAnalysisandtheminimumDNBRforall..RWAsisunchanged.
{{#Wiki_filter:Attachment;ARemove3.1-4b3.1-4e3.5-3Insert3;1-4b3.1-4e3.1-4f3.5-38401250282840119,',"PDRADQCK05000244.,'"".PDR 3.1.1.5PressurizerWheneverthereactorisathotshutdownorcriticalthepressurizershallhaveatleast100kwofheatersoperableandawaterlevelmaintainedbetween10.6%and87%oflevelspan.Ifthepressurizerisinoperableduetoheaterorwaterlevel,restorethepressurizertooperablestatuswithin6hrs.orhavetheRHRsysteminoperationwithinanadditional6hrs.,Bases:TheplantisdesignedtooperatewithallreactorcoolantloopsinoperationandmaintaintheDNBRabove1.30duringallnormal3.1-4bChangeNo.ggAmendmentNo.gP,gg,jfg>PROPOSED TemperaturerequirementsforthesteamgeneratorcorrespondwithmeasuredNDTfortheshellandallowablethermalstressesinthetubesheet.Eachofthepressurizercodesafetyvalvesisdesignedtorelieve288,000lbs.perhr.ofsaturatedsteamatthevalvesetpoint.Below350Fand350psiginthereactorcoolantsystem,the0residualheatremovalsystemcanremovedecayheatandtherebyIIcontrolsyst'mtemperatureandpressure.Ifnoresidualheatwereremovedbyanyofthemeansavailable,theamountofsteamwhichcouldbegeneratedatsafetyvalvereliefpressurewouldbelessthanhalfthevalves'apacity.Onevalve,therefore,providesadequatedefenseagainstoverpressurization.Thepoweroperatedreliefvalves(PORVs)operatetorelieveRCSpressurebelowthesettingofthepressurizercodesafetyvalves.Thesereliefvalveshaveremotelyoperatedblockvalvestoprovideapositiveshutoffcapabilityshouldareliefvalvebecomeinoper-able.TheelectricalpowerforboththereliefvalvesandtheblockvalvesiscapableofbeingsuppliedfromanemergencypowersourcetoensuretheabilitytosealthispossibleRCSleakagepath.Therequirementthat100kwofpressurizerheatersandtheirassociatedcontrolsbecapableofbeingsuppliedelectricalpowerfromanemergencybusprovidesassurancethattheseheaterscanbeenergizedduring''ossofoffsitepowerconditiontomaintainnaturalcirculationathotshutdownandduring3.1-4eAmendmentNo.gP,gg,PROPOSED cooldown.Thepressurizerlowlevellimitof10.6%is"the(3)levelbelowwhichtheheatersarede-energizedtopreventdamage.References(1)FSARSection14.1.6(2)FSARSection7.2.3(3)LetterfromL.D.White,Jr.toD.L.Ziemann,USNRC,datedOctober17,19793.1-4fPROPOSED TABLE3.5-1INSTRUMENTOPERATIONCONDITIONSPage1of2NO.FUNCTIONALUNITNO.ofMIN.MIN.NO.ofCHANNELSOPERABLEDEGREEOFCHANNELSTOTRIP***CHANNELS'REDUNDANCYPERMISSIBLEBYPASSCGNDITIONS6OPERATORACTIONIFCONDITIONSOFCOLUMN3OR5CANNOTBEMET1.Manual2.NuclearFluxPowerRangelowsettinghighsetting3.NuclearFluxIntermediateRange222of4pawerrangechannelsgreaterthan8%F.P.(lawsettingonly)2of4powerrangechannelsgreaterthan8%F.P.MaintainhotshutdawnMaintainhotshutdawnMaintainhotshutdawn.Note14.NuclearFluxSourceRange5.OvertemperatureT1of2intermediateMaintainhotrangechygnelsgreatershutdown.Notethan10amps.=1Maintainhotshutdown6.Overpawer-TCOs7OQMgU~8.HiPressurizerPressureZawPressurizerPressureMaintainhotshutdawnMaintainhotshutdownMaintainhotshutdownPressurizer-HiWaterLevelMaintainhotshutdawnLawFlowinoneloop(>50%F.P.)LowFlowbothloops(10-50%F.P.)3/loop2/loop(anyloop)3/loop2/loop(anyloop)MaintainhotshutdownMaintainhotshutdown AttachmentBThecurrentspecificationonpressurizerwaterlevelstatesthatthepressurizerlevelshallbemaintainedbetween12and87%.Theupperlimitisbasedonahighleveltripsetpointwithsufficientmargintoaccountforreferencelegheatup.Thereisnobasisforthe12%lowerlimit.Sincelowpressurizerheatersarede-energizedat10.6%,amoreappropriatevaluewouldbe10.6%.TheP-10permissiveallowsmanualblockingoftheinter-mediaterangerodstop,theintermediaterangehighfluxtrip,andlowsetpointofthepowerrangehighfluxtripabove10%power.Thesetripsareusedtomitigatetheconsequencesofarodwith-drawaltransientfromsubcritical.TheproposedTechnicalSpecificationchangewouldallowtheabovetripstobebypassed(blocked)at8%power.ThischangeisnecessarybecauseP-7permissiveisrequiredat8.5%power.SinceoneoftheinputstoP-7comesfromthesamepowerrangebistablethatsuppliesP-10,P-10mustbeactuatedat8%powertosatisfy'.therequirementsforP-7.P-7automaticallyunblocksthefollow-.ingreactortrips:2looplowflow,reactorcoolantpumpbusundervoltage,reactorcoolantpumpbusunderfrequency,pressurizerlowpressure,andturbinetripwithP-9.Thesetripsareassociatedwiththe130MWwhichistheupperlimitofheatremovalwhileonnaturalcirculation.Theonlytransientanalysiswhichusesthistripisaslowrodwithdrawal.(Borondilutionisboundedbytheslowrodwithdrawal.)TheonlyeffectofreducingP-10to8%wouldbethatarodwithdrawalaccident(RWA)startingfrom8%wouldbeterminatedbyhighfluxandovertemperatureTversustheintermediateandreducedhighpowertrips.AnevaluationperformedontheRWAstartingfrom8%and10%forvariousreactivityinsertionratesshowsapproximatelythesameDNBRwhentheRWAisinitiatedfrom8%versus10%power.Further,thereissubstantialmarginbetweentheDNBRforaRWAfrom10%andthelimitingRWAfrom100%power.TheDNBRforaRWAstartingfrom8%willalsobegreaterthantheDNBRforthelimitingRWAstartedfrom100%power.Therefore,reducingP-10to8%hasnegligibleeffectontheGinnaSafetyAnalysisandtheminimumDNBRforall..RWAsisunchanged.
AttachmentCInaccordancewith10CFR50.91,thesechangestotheTechnicalSpecificationshavebeenevaluatedagainstthreecriteriatodetermineiftheoperationofthefac'ilityinaccordancewiththeproposedamendmentwould:l.involveasignificant,increaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated;or2.createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated;or3.involveasignificantreductioninamarginofsafety.Asoutlinedbelow,RochesterGasandElectricsubmitsthattheissuesassociatedwiththisamendmentrequestareoutsidethecriteriaof10CFR50.91,andtherefore,anosignificanthazardsfindingiswarranted.Theproposedchangewouldreducethelowerpressurizerlevel'.limitfrom12to10.6%.Thisdoesnotincreasetheprobabilityo'consequencesofanaccident.Thisdoesnotcreateanewordifferentaccident.Thisdoesnotreduceasafetymargin.TheproposedchangealsoreducestheP-10setpointfrom10to8%.Theevaluationdoneshowsthatforthelimitingaccidents,thesafetymarginisnotsignificantlyreduced.Thischangedoesnotincreasetheprobabilityorconsequencesofanaccident.Thischangesdoesnotcreateanewordifferentaccident.Therefore,anosignificanthazardsfindingiswarrantedfortheproposedchanges.
AttachmentCInaccordancewith10CFR50.91,thesechangestotheTechnicalSpecificationshavebeenevaluatedagainstthreecriteriatodetermineiftheoperationofthefac'ilityinaccordancewiththeproposedamendmentwould:l.involveasignificant,increaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated;or2.createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated;or3.involveasignificantreductioninamarginofsafety.Asoutlinedbelow,RochesterGasandElectricsubmitsthattheissuesassociatedwiththisamendmentrequestareoutsidethecriteriaof10CFR50.91,andtherefore,anosignificanthazardsfindingiswarranted.Theproposedchangewouldreducethelowerpressurizerlevel'.limitfrom12to10.6%.Thisdoesnotincreasetheprobabilityo'consequencesofanaccident.Thisdoesnotcreateanewordifferentaccident.Thisdoesnotreduceasafetymargin.TheproposedchangealsoreducestheP-10setpointfrom10to8%.Theevaluationdoneshowsthatforthelimitingaccidents,thesafetymarginisnotsignificantlyreduced.Thischangedoesnotincreasetheprobabilityorconsequencesofanaccident.Thischangesdoesnotcreateanewordifferentaccident.Therefore,anosignificanthazardsfindingiswarrantedfortheproposedchanges.
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Revision as of 11:41, 18 May 2018

Proposed Tech Specs Reducing Requirement for Low Pressurizer Water Level from 12 to 10.6% & Changing P-10 Permissive from 10 to 8% Power
ML17309A323
Person / Time
Site: Ginna Constellation icon.png
Issue date: 01/19/1984
From:
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17309A321 List:
References
NUDOCS 8401250282
Download: ML17309A323 (8)
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Text

Attachment;ARemove3.1-4b3.1-4e3.5-3Insert3;1-4b3.1-4e3.1-4f3.5-38401250282840119,',"PDRADQCK05000244.,'"".PDR 3.1.1.5PressurizerWheneverthereactorisathotshutdownorcriticalthepressurizershallhaveatleast100kwofheatersoperableandawaterlevelmaintainedbetween10.6%and87%oflevelspan.Ifthepressurizerisinoperableduetoheaterorwaterlevel,restorethepressurizertooperablestatuswithin6hrs.orhavetheRHRsysteminoperationwithinanadditional6hrs.,Bases:TheplantisdesignedtooperatewithallreactorcoolantloopsinoperationandmaintaintheDNBRabove1.30duringallnormal3.1-4bChangeNo.ggAmendmentNo.gP,gg,jfg>PROPOSED TemperaturerequirementsforthesteamgeneratorcorrespondwithmeasuredNDTfortheshellandallowablethermalstressesinthetubesheet.Eachofthepressurizercodesafetyvalvesisdesignedtorelieve288,000lbs.perhr.ofsaturatedsteamatthevalvesetpoint.Below350Fand350psiginthereactorcoolantsystem,the0residualheatremovalsystemcanremovedecayheatandtherebyIIcontrolsyst'mtemperatureandpressure.Ifnoresidualheatwereremovedbyanyofthemeansavailable,theamountofsteamwhichcouldbegeneratedatsafetyvalvereliefpressurewouldbelessthanhalfthevalves'apacity.Onevalve,therefore,providesadequatedefenseagainstoverpressurization.Thepoweroperatedreliefvalves(PORVs)operatetorelieveRCSpressurebelowthesettingofthepressurizercodesafetyvalves.Thesereliefvalveshaveremotelyoperatedblockvalvestoprovideapositiveshutoffcapabilityshouldareliefvalvebecomeinoper-able.TheelectricalpowerforboththereliefvalvesandtheblockvalvesiscapableofbeingsuppliedfromanemergencypowersourcetoensuretheabilitytosealthispossibleRCSleakagepath.Therequirementthat100kwofpressurizerheatersandtheirassociatedcontrolsbecapableofbeingsuppliedelectricalpowerfromanemergencybusprovidesassurancethattheseheaterscanbeenergizedduringossofoffsitepowerconditiontomaintainnaturalcirculationathotshutdownandduring3.1-4eAmendmentNo.gP,gg,PROPOSED cooldown.Thepressurizerlowlevellimitof10.6%is"the(3)levelbelowwhichtheheatersarede-energizedtopreventdamage.References(1)FSARSection14.1.6(2)FSARSection7.2.3(3)LetterfromL.D.White,Jr.toD.L.Ziemann,USNRC,datedOctober17,19793.1-4fPROPOSED TABLE3.5-1INSTRUMENTOPERATIONCONDITIONSPage1of2NO.FUNCTIONALUNITNO.ofMIN.MIN.NO.ofCHANNELSOPERABLEDEGREEOFCHANNELSTOTRIP***CHANNELS'REDUNDANCYPERMISSIBLEBYPASSCGNDITIONS6OPERATORACTIONIFCONDITIONSOFCOLUMN3OR5CANNOTBEMET1.Manual2.NuclearFluxPowerRangelowsettinghighsetting3.NuclearFluxIntermediateRange222of4pawerrangechannelsgreaterthan8%F.P.(lawsettingonly)2of4powerrangechannelsgreaterthan8%F.P.MaintainhotshutdawnMaintainhotshutdawnMaintainhotshutdawn.Note14.NuclearFluxSourceRange5.OvertemperatureT1of2intermediateMaintainhotrangechygnelsgreatershutdown.Notethan10amps.=1Maintainhotshutdown6.Overpawer-TCOs7OQMgU~8.HiPressurizerPressureZawPressurizerPressureMaintainhotshutdawnMaintainhotshutdownMaintainhotshutdownPressurizer-HiWaterLevelMaintainhotshutdawnLawFlowinoneloop(>50%F.P.)LowFlowbothloops(10-50%F.P.)3/loop2/loop(anyloop)3/loop2/loop(anyloop)MaintainhotshutdownMaintainhotshutdown AttachmentBThecurrentspecificationonpressurizerwaterlevelstatesthatthepressurizerlevelshallbemaintainedbetween12and87%.Theupperlimitisbasedonahighleveltripsetpointwithsufficientmargintoaccountforreferencelegheatup.Thereisnobasisforthe12%lowerlimit.Sincelowpressurizerheatersarede-energizedat10.6%,amoreappropriatevaluewouldbe10.6%.TheP-10permissiveallowsmanualblockingoftheinter-mediaterangerodstop,theintermediaterangehighfluxtrip,andlowsetpointofthepowerrangehighfluxtripabove10%power.Thesetripsareusedtomitigatetheconsequencesofarodwith-drawaltransientfromsubcritical.TheproposedTechnicalSpecificationchangewouldallowtheabovetripstobebypassed(blocked)at8%power.ThischangeisnecessarybecauseP-7permissiveisrequiredat8.5%power.SinceoneoftheinputstoP-7comesfromthesamepowerrangebistablethatsuppliesP-10,P-10mustbeactuatedat8%powertosatisfy'.therequirementsforP-7.P-7automaticallyunblocksthefollow-.ingreactortrips:2looplowflow,reactorcoolantpumpbusundervoltage,reactorcoolantpumpbusunderfrequency,pressurizerlowpressure,andturbinetripwithP-9.Thesetripsareassociatedwiththe130MWwhichistheupperlimitofheatremovalwhileonnaturalcirculation.Theonlytransientanalysiswhichusesthistripisaslowrodwithdrawal.(Borondilutionisboundedbytheslowrodwithdrawal.)TheonlyeffectofreducingP-10to8%wouldbethatarodwithdrawalaccident(RWA)startingfrom8%wouldbeterminatedbyhighfluxandovertemperatureTversustheintermediateandreducedhighpowertrips.AnevaluationperformedontheRWAstartingfrom8%and10%forvariousreactivityinsertionratesshowsapproximatelythesameDNBRwhentheRWAisinitiatedfrom8%versus10%power.Further,thereissubstantialmarginbetweentheDNBRforaRWAfrom10%andthelimitingRWAfrom100%power.TheDNBRforaRWAstartingfrom8%willalsobegreaterthantheDNBRforthelimitingRWAstartedfrom100%power.Therefore,reducingP-10to8%hasnegligibleeffectontheGinnaSafetyAnalysisandtheminimumDNBRforall..RWAsisunchanged.

AttachmentCInaccordancewith10CFR50.91,thesechangestotheTechnicalSpecificationshavebeenevaluatedagainstthreecriteriatodetermineiftheoperationofthefac'ilityinaccordancewiththeproposedamendmentwould:l.involveasignificant,increaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated;or2.createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated;or3.involveasignificantreductioninamarginofsafety.Asoutlinedbelow,RochesterGasandElectricsubmitsthattheissuesassociatedwiththisamendmentrequestareoutsidethecriteriaof10CFR50.91,andtherefore,anosignificanthazardsfindingiswarranted.Theproposedchangewouldreducethelowerpressurizerlevel'.limitfrom12to10.6%.Thisdoesnotincreasetheprobabilityo'consequencesofanaccident.Thisdoesnotcreateanewordifferentaccident.Thisdoesnotreduceasafetymargin.TheproposedchangealsoreducestheP-10setpointfrom10to8%.Theevaluationdoneshowsthatforthelimitingaccidents,thesafetymarginisnotsignificantlyreduced.Thischangedoesnotincreasetheprobabilityorconsequencesofanaccident.Thischangesdoesnotcreateanewordifferentaccident.Therefore,anosignificanthazardsfindingiswarrantedfortheproposedchanges.

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