ML17207A733

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Tech Specs Pages 3/4 7-33 Through 3/4 7-37,deleting 27 Entries from Table 3.7-2 Re Replacement of safety-related Hydraulic Snubbers
ML17207A733
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 01/09/1980
From:
FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17207A732 List:
References
NUDOCS 8001140450
Download: ML17207A733 (14)


Text

ITABLE3.7-2ContinuedSAFETYRELATEDHYDRAULICSNUBBERS*FPLLOCATIONHARKNO.NO.SYSTEMSNUBBERINSTALLEDACCESSIBLEORONLOCATIONANDELEVATIONINACCESSIBLEAorIHIGHRADIATIONZONE**YesorNoESPECIALLYDIFFICULTTOREMOVEYesorNo033034036037038039040041042043044047HS649-319HS548-5HS649-314HS649-314HS649-310HS649-304AHS548-9NS548-9BF549-7BF549-7BF549-8BF549-17HS,HS,MS,HS,MS,HS,HS,HS,BF,BF,BF,BF,ReactorBldg.,ReactorBldg.,ReactorBldg.,ReactorBldg.,ReactorBldg.,ReactorBldg.,ReactorBldg.,ReactorBldg.,ReactorBldg.,ReactorBldg.,ReactorBldg.,ReactorBldg.,Elev.,82'lev.82'lev.55'lev.55'lev.50'lev.30'lev.50'lev.50'lev.40'lev.40'lev.40'lev.36'AIIIAIIIIIANoNoNoNoNoNoNoNoNoNoNoNoNoYesYesYesNoNoYesYesCOC7 TABLE3.7-2ContinuedSAFETYRELATEDHYDRAULICSNUBBERS*FPLLOCATIONHARKNO.NO.SYSTEMSNUBBERINSTALLEDACCESSIBLEORONLOCATIONANDELEYATIONINACCESSIBLEAorIHIGHRADIATIONZONE**YesorNoESPECIALLYDIFFICULTTOREMOVEYesorNo052BF549-17BF,ReactorBldg.,Elev.36'53SI968-210SI,ReactorBldg.,Elev.16'58SI969-1216SI,ReactorBldg.,Elev.18'ANoNoNoNoNo

'ql TABLE3.7-2ContinuedSAFETYRELATEDHYDRAULICSNUBBERS*FPLLOCATIONMARKNO.NO.SYSTEMSNUBBERINSTALLEDACCESSIBLEORONLOCATIONANDELEVATIONINACCESSIBLE(AorI)HIGHRADIATIONESPECIALLYDIFFICULTZONE**TOREMOVE(YesorNo(YesorNo081SI676-67SI,RAB,Elev.4'82SI676-67SI,RAB,Elev.4'83SI676-105SI,RAB,Elev.4'AANoNoNoNoNoNo

>>NIr.~il TABLE3.7-2ContinuedSAFETYRELATEDHYDRAULICSNUBBERS*FPLLOCATIONMARKNO.NO.SYSTEMSNUBBERINSTALLEDACCESSIBLEORHIGHRADIATIONESPECIALLYDIFFICULTONLOCATIONANDfLEYATIONINACCESSIBLEZONE**TOREMOYEAorIYesorNoYesorNo084SI676-105SI,RAB,Elev.4'12SI676-4505SI,RAB,Elev.7'ANoNotDCOC)

TABLE3.7-2ContinuedSAFETYRELATEDHYDRAULICSNUBBERS*FPLLOCATIONHARKNO.NO.SYSTEMSNUBBERINSTALLEDACCESSIBLEOR-HIGHRADIATIONESPECIALLYDIFFICULTON,LOCATIONANDELEVATIONINACCESSIBLEZONE**.TOREMOYEAorIYesorNoYesorNo102HS-649-313CC,RAB,Elev.26'No VVn SAFETY'EVALUATIONRe:St.LucieUnit1DocketNo.50-335SnubbersI.IntroductionThisevaluationsupportsaproposedchangetoTable3.7-2(SAFETYRELATEDHYDRAULICSNUBBERS).Severalsnubbersonthelistaredeletedbecausetheyarescheduledtobereplacedbymechanicalsnubbersduringthenextrefuelingoutage(Spring1980).Onlysmallersnubbersofthe3kip(3000inch-pounds)and10kipsizewillbeaffectedbythechangeover(seeattachedlist)-II.EvaluationThesnubbersinquestionaredesignedandinstalledforseismicconsiderations.Thatis,theirdesignfunctionistoaccommodatepipemovementcausedbyslowthermalexpansion,butto"lock-up"topreventpotentiallydamagingtransientmovementduringapostulatedseismiceventofsufficie'ntmagnitude.ThePacificScientific(PSA)mechanicalsnubberswhichweproposetouseoperateonan"accelerationlimiting"basis.PSAsnubberspermitthermalmovementsincetheacceleration.associatedwiththermalmovementisverylow,buttheylimitseismicinducedaccelerationto0.02g..Mechanicalsnubberswouldactuallyallowlessmovementthanhydraulicsnubbersunderseismicconditionsbecause

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ofhydraulicsnubberlockupdelaysassociatedwithachieving-thelockupvelocity,activationofthelockupmechanism,andcompressionofthehydraulicfluid.Therefore,basedonseismicfunctionalrequirements,theplannedreplacementofhydraulicsnubberswithmechanicalsnubberswouldbeanimprovement.PacificScientificperformedextensivetestingindevelopingthePSA3(3kip)andPSA10mechanicalsriubbers.Thepurposewastoevaluatetheiroperabilityundertheadverseconditionsexpectedinmanyapplications,suchashighhumidity,hightemperature,andvibration.Thesnubbersoperatedfavorablyunderalltestconditions.PSA3andPSA10mechanicalsnubbersarecurrentlyinuseatSt.Lucie(seeAmendment31toFacilityOperatingLicenseDPR-67)andatalargenumberofotherreactorsites.TheuseofthesesnubbershasbeenpreviouslyevaluatedbytheCommissionandfoundtobeacceptable.III.ConclusionsBasedontestingandoperatingexperience,theuseofPSAmechanicalsnubbersshouldimprovetheoperabilityoftheseismicsupportsystem.Inconclusion,(1)theproposedchangedoesnotincreasetheprobabilityorconsequencesofaccidentsormalfunctionsofequipmentimportanttosafetyanddoesnotreducethemarginofsafetyasdefinedinthebasisforanytechnicalspecification,therefore,thechangedoesnotinvolveasignificanthazardsconsideration,(2)thereisreasonableassurancethatthehealthandsafetyofthepublicwillnotbeendangeredby operationintheproposedmanner,and(3)suchactivitieswillbeconductedincompliancewiththeCommission'sregulationsandthe-issuanceofthisamendmentwillnotbeinimicaltothecommondefenseandsecurityortothehealthandsafetyofthepublic.

~~rSnubberChaneoutPSLThefolios(inghydraulicsnubbersarescheduledtobereplacedbymechanicalsnubbersduringtheSpring1980refuelingoutage:V3KipSize10KipSizeTagNo.HarkNo.TagNo.HarkNo.035061066073.074076077079080086087088089090091092093096106107110111114HS-1076-3164HS-549-11(SI-970-1248)HS-549-11(SI-970-.1248)SI-972-6240SI-973-240SI-973-6224SI-868-64SI-868-163SI-868-410SI-676-129SI-676-241(SI-676-250)CC-1899-48CC-1852-6241SPS-27SPS-417SPS-467SPS-777CC-1865-9CH-3-40CH-3-75SI-676-247(SI-676-2475)SI-676-2475ASI>>972-6240101103104105CC-17-1CC-21-5CC-21-1CC-23-2 0iPc4l'I~,t