ML17219A583

Proposed Tech Specs Changing Section 3/4.6.4 to Clarify Hydrogen Analyzer Sys Configuration & to Allow Second Method of Hydrogen Analysis.Determination of No Significat Hazards & Util Safety Evaluation Encl

ML17219A583
Person / Time
Site:	Saint Lucie
Issue date:	05/13/1987
From:	FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17219A581	List: ML17219A580 ML17219A583
References
NUDOCS 8705220457
Download: ML17219A583 (8)

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ATTACHMENTIMarked-upTechnicalSpecificationPage3/46-24Fq,57870513PDRgDOCpDR87O5~~Oyp5OOOg8>PMSDI/008/2 kPQ~$

CONTAINMENTSYSTEMS3/4.6.4COMBUSTIBLEGASCONTROLHYDROGENANALYZERSLIMITINGCONDITIONFOROPERATION3.6.4.1TwoindependentcontainmenthydrogenanalyzersshallbeOPERABLE.APPLICABILITY:MODES1and2.ACTION:Withonehydrogenanalyzerinoperable,restoretheinoperableanalyzertoOPERABLEstatuswithin30daysor~beinatleastHOTSTANDBYwithinthenext)grno~)rezi%w'h)eMA294ots54)~qfQbsamplesqshe&oq)4,Nb+ftL'b)e.hqhrpgq0+Qqqt.fbljp%e.Cot+6Llih~~od&VR&Quan(4.op%Ie,eon44en>a>mpberein><)hegrabsaKpk~rI>i~>m~<<fqCaqa'oiYA>ogive,qadi&rnite,SqS>etna4)ea4onceqeVMchylekhereqf4run'thee.nepnoXhoh~h<pqgangleri~rdvrn@4oSURVEILLANCEREUIREMENTS6PKR95iQc)<4~4.6.4.1EachhydrogenanalyzershallbedemonstratedOPERABLEbytheperformanceofaCHANNELFUNCTIONALTESTatleastorceper31days,'ndatleastonceper92daysonaSTAGGEREDTESTBASISbyperformingaCHANNELCALIBRATIONusingsamplegasescontaining:Nominalga.~Onevolumepercenthydrogen,balancenitrogenandoxygen.Noologyb.Fourvolumepercenthydrogen,balancenitrogenandoxygen.ST.LUCIE-UNIT23/46-24 4I ATTACHMENT2SAFETYEVALUATIONINTRODUCTIONAchangeisproposedtoreviseTechnicalSpecification3/4.6.4,CombustibleGasControl-HydrogenAnalyzersforSt.LucieUnit2.Thechangeisneededtoallowasecondmethodofhydrogenanalysisandclarifythecontainmenthydrogenanalyzersystemconfiguration.DISCUSSIONThecurrentTechnicalSpecification3/4.6.4hasrequirementsfortwoindependentcontainmenthydrogenanalyzers,howeverdoesnotdirectlystatehowthegrabsamplesystemcanbeusedasamethodofcontainmenthydrogensampling.Whenthesamplingmodeisselected,apumponthehydrogenanalyzerdrawsthecontainmentairthroughapre-selectedpathandintotheanalyzingunit.Agrabsamplecylinderisconnectedtothehydrogenanalyzersamplereturnline.Thisgrabsamplesystemconsistsofaradiologicallyshieldedcylinderthroughwhichthepumponthehydrogenanalyzer,usingthesamepipingforthepre-selectedflowpath,drawsthecontainmentairforsampling.Afterflowisestablished,thecylinderisisolatedbymeansofmanualvalves,removedfromtheanalyzerandtakentoalaboratoryforonsiteanalysis.Thesampleisanalyzedforhydrogenconcentrationinthelaboratoryusingagaschromagraphmethod,whichiscalibratedpriortoeachsampleanalysisascomparedtothe'hermal'conductivitymethodofanalysisdoneinthehydrogenanalyzer.Theuseofthewordnominallyistoaccountfortheslightvariationsinvendorsuppliedcalibrationsamples.MSDI/QQ8/3 44e~'II4144I ATTACHMENT3DETERMINATIONOFNOSIGNIFICANTHAZARDSCONSIDERATIONThestandardsusedtoarriveatadeterminationthatarequestforamendmentinvolvesnosignificanthazardsconsiderationareincludedintheCommission'sregulations,IOCFR50.92,whichstatesthatnosignificanthazardsconsiderationsareinvolvediftheoperationofthefacilityinaccordancewiththeproposedamendmentwouldnot(I)involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated;or(2)createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluatedor(3)involveasignificantreductioninamarginofsafety.Eachstandardisdiscussedasfollows:(I)Operationofthefacilityinaccordancewiththeproposedamendmentwouldnotinvolveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated.Theinclusionofthegrabsamplelaboratoryanalysisbeingasubstitutionforthelocalhydrogenanalyzeranalysiscannotinvolveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluatedbecause:a)b)c)thesamecontainmentsampleflowpathis'used;thesamesamplepumpisusedwiththetwosystemssothatthesamplethrougheitheristhesame;andthemethodofgrabsamplelaboratoryanalysisrequiresacalibrationaspartoftheanalysis.Thisensuresaccuracyduringanalysis.(2)Useofthemodifiedspecificationwouldnotcreatethepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated.Anewordifferentkindofaccidentthananypreviouslyevaluatedisnotcreatedbythespecificationbeingmodifiedtoallowforthelaboratoryanalysisofthegrabsample.Thisgrabsampleisanalternativemethodofmonitoringthecontainmentatmosphereafteranaccidentandisnotapossiblecauseofanewordifferentkindofaccident.(3)Useofthemodifiedspecificationwouldnotinvolveasignificantreductioninamarginofsafety.Thehydrogenanalyzers,whilebeingrequiredbyTechnicalSpecifications,donothaveanactivepartinthedeterminationofmarginofsafety.Theinclusionofanalternatemethodofanalysisdoesnotchangethefunctionoraccuracyofthehydrogenanalyzersystem.Basedontheabove,wehavedeterminedthattheamendmentrequestdoesnot(I)involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated,(2)createtheprobabilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated,or(3)involveasignificantreductioninamarginofsafety;andthereforedoesnotinvolveasignificanthazardsconsideration.MSDI/008/4 Ca(".V'EIh't'JII4ll4III