ML17251A145: Difference between revisions
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{{#Wiki_filter:ATTACHMENT11.4'I'iable-erabilit1JHAsystem,subsystem,train,component'rdeviceshallbeoperableorhaveoperabilitywhenitiscapableofperformingitsspecifiedfunction(s).Implicitinthisdefinitionshallbetheassumptionthatallnecessaryattendantinstrumentation,controls,normaloremergencyelectricalpowersources(subjecttolSection3.0.2),coolingorsealwater;lubrication,supports,orotherauxiliaryequipmentthatarerequiredforthesystem,subsystem,train,componentordevicetoperformitsfunction(s)arealsocapableofperformingtheirrelatedsupportfunction(s).Amendment4g1-laPROPOSED88070500i888062iPDRADQCN,05000240PPDR | {{#Wiki_filter:ATTACHMENT11.4'I'iable-erabilit1JHAsystem,subsystem,train,component'rdeviceshallbeoperableorhaveoperabilitywhenitiscapableofperformingitsspecifiedfunction(s).Implicitinthisdefinitionshallbetheassumptionthatallnecessaryattendantinstrumentation,controls,normaloremergencyelectricalpowersources(subjecttolSection3.0.2),coolingorsealwater;lubrication,supports,orotherauxiliaryequipmentthatarerequiredforthesystem,subsystem,train,componentordevicetoperformitsfunction(s)arealsocapableofperformingtheirrelatedsupportfunction(s).Amendment4g1-laPROPOSED88070500i888062iPDRADQCN,05000240PPDR | ||
~4 ATTACHMENT21.ClarificationoftheJuly24,1987responsetoNRCStaffestion54reardinSGsnubbers.TheSGsnubbersarenotrequiredtobefunctionallytested,sincesnubberlockupisnotacrediblefailuremode.However,extensivemaintenanceisperformedonthesesnubbersinordertocomplywiththe"snubbersealservicelifemonitoring"TechnicalSpecification4.14.1.f.ThatmaintenanceisdescribedinProcedureM-40.7,whichprovidesinstructionsforremoval,inspection,maintenance,test,andreinstallationofAnker-Holthsnubbersonthesteamgenerators.Theseactivitiesincludedisassembly,cleaning,replacement.ofallsealsandreplacementofhydraulicfluid.Followingtherebuildingofthesnubber,ahydrostatictestisperformedoneachsnubbertoverifypressureintegrityandsealinstallation.Theseactivitiesareperformedatamaximumofa10yearintervalsoastoensuresnubbersealservicelifeisnotexceeded..TheresultsofthismaintenancearerecordedintheplantrecordsinaccordancewithproposedTechnicalSpecification6.10.2.m.All16steamgeneratorsnubbershavebeen.rebuilttwiceeachsinceplantstartup.2.ResonsetoNRCStaffestiononMechanicalSnubbersTheStandardTechnicalSpecificationsstatethatmechanicalsnubberfunctionaltestacceptancecriteriainclude:"Dragforceshallnothaveincreasedmorethan50%sincethelastfunctionaltest."Inlieuofthis,RG&EprovidesthefollowingmeansofmonitoringsnubberdragforcesintheGinnaStationSnubberInspectionandTestProgram.Theprogramrequiresfunctionaltestresultstobereviewedtodetermineacceptabilityofresults.Ifdragforce.isnotgreaterthan1%ofsnubbernormaldesignload,thesnubbermaybeinstalledinanylocation.Ifsnubberdragforceisbetween1-oand5%,thesnubberacceptabilityisbasedonatablecorrelatingsnubbersizewithpipesize.Overa5%dragisconsideredunacceptable.However,anysnubberwithadragforcegreaterthan2%isconsidereddegradedandisrequiredtoberepairedorr'eplacedasapreventivemaintenancemeasure.Thus,RG&Econsidersthattheidentificationofpotentialdegradationrelativetorequiredsnubberfunctionisconservativelyevaluatedandmonitoredinourpresentprogram. | ~4 ATTACHMENT21.ClarificationoftheJuly24,1987responsetoNRCStaffestion54reardinSGsnubbers.TheSGsnubbersarenotrequiredtobefunctionallytested,sincesnubberlockupisnotacrediblefailuremode.However,extensivemaintenanceisperformedonthesesnubbersinordertocomplywiththe"snubbersealservicelifemonitoring"TechnicalSpecification4.14.1.f.ThatmaintenanceisdescribedinProcedureM-40.7,whichprovidesinstructionsforremoval,inspection,maintenance,test,andreinstallationofAnker-Holthsnubbersonthesteamgenerators.Theseactivitiesincludedisassembly,cleaning,replacement.ofallsealsandreplacementofhydraulicfluid.Followingtherebuildingofthesnubber,ahydrostatictestisperformedoneachsnubbertoverifypressureintegrityandsealinstallation.Theseactivitiesareperformedatamaximumofa10yearintervalsoastoensuresnubbersealservicelifeisnotexceeded..TheresultsofthismaintenancearerecordedintheplantrecordsinaccordancewithproposedTechnicalSpecification6.10.2.m.All16steamgeneratorsnubbershavebeen.rebuilttwiceeachsinceplantstartup.2.ResonsetoNRCStaffestiononMechanicalSnubbersTheStandardTechnicalSpecificationsstatethatmechanicalsnubberfunctionaltestacceptancecriteriainclude:"Dragforceshallnothaveincreasedmorethan50%sincethelastfunctionaltest."Inlieuofthis,RG&EprovidesthefollowingmeansofmonitoringsnubberdragforcesintheGinnaStationSnubberInspectionandTestProgram.Theprogramrequiresfunctionaltestresultstobereviewedtodetermineacceptabilityofresults.Ifdragforce.isnotgreaterthan1%ofsnubbernormaldesignload,thesnubbermaybeinstalledinanylocation.Ifsnubberdragforceisbetween1-oand5%,thesnubberacceptabilityisbasedonatablecorrelatingsnubbersizewithpipesize.Overa5%dragisconsideredunacceptable.However,anysnubberwithadragforcegreaterthan2%isconsidereddegradedandisrequiredtoberepairedorr'eplacedasapreventivemaintenancemeasure.Thus,RG&Econsidersthattheidentificationofpotentialdegradationrelativetorequiredsnubberfunctionisconservativelyevaluatedandmonitoredinourpresentprogram. | ||
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Revision as of 15:13, 18 May 2018
ML17251A145 | |
Person / Time | |
---|---|
Site: | Ginna ![]() |
Issue date: | 06/21/1988 |
From: | ROCHESTER GAS & ELECTRIC CORP. |
To: | |
Shared Package | |
ML17251A136 | List: |
References | |
NUDOCS 8807050018 | |
Download: ML17251A145 (4) | |
Text
ATTACHMENT11.4'I'iable-erabilit1JHAsystem,subsystem,train,component'rdeviceshallbeoperableorhaveoperabilitywhenitiscapableofperformingitsspecifiedfunction(s).Implicitinthisdefinitionshallbetheassumptionthatallnecessaryattendantinstrumentation,controls,normaloremergencyelectricalpowersources(subjecttolSection3.0.2),coolingorsealwater;lubrication,supports,orotherauxiliaryequipmentthatarerequiredforthesystem,subsystem,train,componentordevicetoperformitsfunction(s)arealsocapableofperformingtheirrelatedsupportfunction(s).Amendment4g1-laPROPOSED88070500i888062iPDRADQCN,05000240PPDR
~4 ATTACHMENT21.ClarificationoftheJuly24,1987responsetoNRCStaffestion54reardinSGsnubbers.TheSGsnubbersarenotrequiredtobefunctionallytested,sincesnubberlockupisnotacrediblefailuremode.However,extensivemaintenanceisperformedonthesesnubbersinordertocomplywiththe"snubbersealservicelifemonitoring"TechnicalSpecification4.14.1.f.ThatmaintenanceisdescribedinProcedureM-40.7,whichprovidesinstructionsforremoval,inspection,maintenance,test,andreinstallationofAnker-Holthsnubbersonthesteamgenerators.Theseactivitiesincludedisassembly,cleaning,replacement.ofallsealsandreplacementofhydraulicfluid.Followingtherebuildingofthesnubber,ahydrostatictestisperformedoneachsnubbertoverifypressureintegrityandsealinstallation.Theseactivitiesareperformedatamaximumofa10yearintervalsoastoensuresnubbersealservicelifeisnotexceeded..TheresultsofthismaintenancearerecordedintheplantrecordsinaccordancewithproposedTechnicalSpecification6.10.2.m.All16steamgeneratorsnubbershavebeen.rebuilttwiceeachsinceplantstartup.2.ResonsetoNRCStaffestiononMechanicalSnubbersTheStandardTechnicalSpecificationsstatethatmechanicalsnubberfunctionaltestacceptancecriteriainclude:"Dragforceshallnothaveincreasedmorethan50%sincethelastfunctionaltest."Inlieuofthis,RG&EprovidesthefollowingmeansofmonitoringsnubberdragforcesintheGinnaStationSnubberInspectionandTestProgram.Theprogramrequiresfunctionaltestresultstobereviewedtodetermineacceptabilityofresults.Ifdragforce.isnotgreaterthan1%ofsnubbernormaldesignload,thesnubbermaybeinstalledinanylocation.Ifsnubberdragforceisbetween1-oand5%,thesnubberacceptabilityisbasedonatablecorrelatingsnubbersizewithpipesize.Overa5%dragisconsideredunacceptable.However,anysnubberwithadragforcegreaterthan2%isconsidereddegradedandisrequiredtoberepairedorr'eplacedasapreventivemaintenancemeasure.Thus,RG&Econsidersthattheidentificationofpotentialdegradationrelativetorequiredsnubberfunctionisconservativelyevaluatedandmonitoredinourpresentprogram.
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