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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:ATTACHMENT 11.4'I'iable-erabilit1JHAsystem,subsystem, train,component'r deviceshallbeoperableorhaveoperability whenitiscapableofperforming itsspecified function(s). |
| ~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. | | Implicitinthisdefinition shallbetheassumption thatallnecessary attendant instrumentation, |
| | : controls, normaloremergency electrical powersources(subjecttolSection3.0.2),coolingorsealwater;lubrication, |
| | : supports, orotherauxiliary equipment thatarerequiredforthesystem,subsystem, train,component ordevicetoperformitsfunction(s) arealsocapableofperforming theirrelatedsupportfunction(s). |
| | Amendment 4g1-laPROPOSED88070500i8 88062iPDRADQCN,05000240PPDR |
| | ~4 ATTACHMENT 21.Clarification oftheJuly24,1987responsetoNRCStaffestion54reardinSGsnubbers. |
| | TheSGsnubbersarenotrequiredtobefunctionally tested,sincesnubberlockupisnotacrediblefailuremode.However,extensive maintenance isperformed onthesesnubbersinordertocomplywiththe"snubbersealservicelifemonitoring" Technical Specification 4.14.1.f. |
| | Thatmaintenance isdescribed inProcedure M-40.7,whichprovidesinstructions forremoval,inspection, maintenance, test,andreinstallation ofAnker-Holth snubbersonthesteamgenerators. |
| | Theseactivities includedisassembly, |
| | : cleaning, replacement |
| | .ofallsealsandreplacement ofhydraulic fluid.Following therebuilding ofthesnubber,ahydrostatic testisperformed oneachsnubbertoverifypressureintegrity andsealinstallation. |
| | Theseactivities areperformed atamaximumofa10yearintervalsoastoensuresnubbersealservicelifeisnotexceeded.. |
| | Theresultsofthismaintenance arerecordedintheplantrecordsinaccordance withproposedTechnical Specification 6.10.2.m. |
| | All16steamgenerator snubbershavebeen.rebuilttwiceeachsinceplantstartup.2.ResonsetoNRCStaffestiononMechanical SnubbersTheStandardTechnical Specifications statethatmechanical snubberfunctional testacceptance criteriainclude:"Dragforceshallnothaveincreased morethan50%sincethelastfunctional test."Inlieuofthis,RG&Eprovidesthefollowing meansofmonitoring snubberdragforcesintheGinnaStationSnubberInspection andTestProgram.Theprogramrequiresfunctional testresultstobereviewedtodetermine acceptability ofresults.Ifdragforce.isnotgreaterthan1%ofsnubbernormaldesignload,thesnubbermaybeinstalled inanylocation. |
| | Ifsnubberdragforceisbetween1-oand5%,thesnubberacceptability isbasedonatablecorrelating snubbersizewithpipesize.Overa5%dragisconsidered unacceptable. |
| | However,anysnubberwithadragforcegreaterthan2%isconsidered degradedandisrequiredtoberepairedorr'eplaced asapreventive maintenance measure.Thus,RG&Econsiders thattheidentification ofpotential degradation relativetorequiredsnubberfunctionisconservatively evaluated andmonitored inourpresentprogram. |
| j~1}} | | j~1}} |
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Text
ATTACHMENT 11.4'I'iable-erabilit1JHAsystem,subsystem, train,component'r deviceshallbeoperableorhaveoperability whenitiscapableofperforming itsspecified function(s).
Implicitinthisdefinition shallbetheassumption thatallnecessary attendant instrumentation,
- controls, normaloremergency electrical powersources(subjecttolSection3.0.2),coolingorsealwater;lubrication,
- supports, orotherauxiliary equipment thatarerequiredforthesystem,subsystem, train,component ordevicetoperformitsfunction(s) arealsocapableofperforming theirrelatedsupportfunction(s).
Amendment 4g1-laPROPOSED88070500i8 88062iPDRADQCN,05000240PPDR
~4 ATTACHMENT 21.Clarification oftheJuly24,1987responsetoNRCStaffestion54reardinSGsnubbers.
TheSGsnubbersarenotrequiredtobefunctionally tested,sincesnubberlockupisnotacrediblefailuremode.However,extensive maintenance isperformed onthesesnubbersinordertocomplywiththe"snubbersealservicelifemonitoring" Technical Specification 4.14.1.f.
Thatmaintenance isdescribed inProcedure M-40.7,whichprovidesinstructions forremoval,inspection, maintenance, test,andreinstallation ofAnker-Holth snubbersonthesteamgenerators.
Theseactivities includedisassembly,
- cleaning, replacement
.ofallsealsandreplacement ofhydraulic fluid.Following therebuilding ofthesnubber,ahydrostatic testisperformed oneachsnubbertoverifypressureintegrity andsealinstallation.
Theseactivities areperformed atamaximumofa10yearintervalsoastoensuresnubbersealservicelifeisnotexceeded..
Theresultsofthismaintenance arerecordedintheplantrecordsinaccordance withproposedTechnical Specification 6.10.2.m.
All16steamgenerator snubbershavebeen.rebuilttwiceeachsinceplantstartup.2.ResonsetoNRCStaffestiononMechanical SnubbersTheStandardTechnical Specifications statethatmechanical snubberfunctional testacceptance criteriainclude:"Dragforceshallnothaveincreased morethan50%sincethelastfunctional test."Inlieuofthis,RG&Eprovidesthefollowing meansofmonitoring snubberdragforcesintheGinnaStationSnubberInspection andTestProgram.Theprogramrequiresfunctional testresultstobereviewedtodetermine acceptability ofresults.Ifdragforce.isnotgreaterthan1%ofsnubbernormaldesignload,thesnubbermaybeinstalled inanylocation.
Ifsnubberdragforceisbetween1-oand5%,thesnubberacceptability isbasedonatablecorrelating snubbersizewithpipesize.Overa5%dragisconsidered unacceptable.
However,anysnubberwithadragforcegreaterthan2%isconsidered degradedandisrequiredtoberepairedorr'eplaced asapreventive maintenance measure.Thus,RG&Econsiders thattheidentification ofpotential degradation relativetorequiredsnubberfunctionisconservatively evaluated andmonitored inourpresentprogram.
j~1
