ML18040A816

Forwards Rev to Deviation Request 6,addressing App R Re Nonfireproofing of Structural Steel,Including Issues & Concerns Raised by NRC During 860730 meeting.Thirty-two Oversize Drawings Encl

ML18040A816
Person / Time
Site:	Susquehanna
Issue date:	10/31/1986
From:	KEISER H W PENNSYLVANIA POWER & LIGHT CO.
To:	ADENSAM E Office of Nuclear Reactor Regulation
Shared Package
ML17146A596	List: ML17146A595 ML17146A597 ML17146A598 ML17146A599 ML17146A600 ML17146A601 ML17146A602 ML17146A603 ML17146A604 ML17146A605 ML17146A606 ML17146A607 ML17146A608 ML17146A609 ML17146A610 ML17146A611 ML17146A612 ML17146A613 ML17146A614 ML17146A615 ML17146A616 ML17146A617 ML17146A618 ML17146A619 ML17146A620 ML17146A621 ML17146A622 ML17146A624 ML17146A625 ML17146A626 ML17146A628 ML17146A629 ML17146A630 ML18040A816
References
PLA-2749, NUDOCS 8611060158
Download: ML18040A816 (6)

Text

PennsylvaniaPower8LightCompanyTwoNorthNinthStreet~Allentown,PA18101~215/770-5151HaroldW.Keiser'icePresident-NuclearOperations215/770-7502OCT33i986DirectorofNuclearReactorRegulationAttention:Ms.E.Adensam,ProjectDirectorBWRProjectDirectorateNo.3DivisionofLicensingU.S.NuclearRegulatoryCommissionWashington,D.C.20555SUSQUEHANNASTEAMELECTRICSTATIONAPPENDIXR-ADDITIONALINFORMATIONONDEVIATIONREQUESTNO.6NON-FIREPROOFSTRUCTURALSTEELPLA-2749FILEP5-1,A17-15DocketNo.50-387and50-388

DearMs.Adensam:

EnclosedisourrevisiontoDeviationRequestNumber6whichaddressesNon-FireproofingofStructuralSteelincludingissuesandconcernsraisedbyyourstaffduringtheirmeetingwithusonJuly30,1986.Inordertoadequatelyaddresstheissuesandconcernsraisedbyyourstaff,anextensivereanalysisoftheUnit1andUnit2ReactorBuildingswasperformed.Thiseffortrequiredadetailedstructuralanalysisinparallelwithafireprotectionevaluationinordertoexamineallareasofeachbuildingonafloor-by-floor,area-by-area,andcase-by-casebasis.Becauseoftheshearmagnitudeofthiseffort,asubstantialamountoftimewasrequiredtocompleteit.Yourstaffexpressedconcernwithouruseofaveragecombustibleloadingsinourpreviousanalysis.Ourreanalysisisbasedonfiretestdata(referencedintheattachedsummaryreport)andexistingplantconfigurations.Ifyouhaveanyquestionsregardingthissubmittal,pleasecontactus.Verytrulyyours,qxH.W.KeiserVicePresident-NuclearOperationscc:M.C.Thadani-NRCL.R.Plisco-'RC8611060158-861031PDR'DOCK05000387':-FPDR APPENDIXRDEVIATIONREUESTE-NONFIREPROOFEDSTRUCTURALSTEELDeviationRequestNo.6RevisedOctober'986'age1of3EIIATIOEEEIEIIExposedstructuralsteelsupportingthefireareabarriersident'ifiedbelowareacceptableanddonotrequirefireproofing.FIREZONESAFFECTED:<'C-iTable1.0providesalistoftheaffectedfirezones.Thistable,als'o.=reefstoaseriesofdrawingsassociatedwitheachfireratedfloor',slab'os6o'w'tfieextentoftherequiredfireprotection.REASONFORDEVIATIONREUEST:IWithintheUnit1and2ReactorBuildingsandControlStructure,cert'ainfloor/ceilingassemb'liesaretobeupgradedtoa3hourfirerating,',<t'o'eparateredundantsafeshutdownequipment.Thestructuralsteelsupportingthesefloorsisnotprotected.JUSTIFICATION:UNIT¹IAND¹2REACTORBUILDINGS:Structuralsteel'associatedwitheachoftheUnit¹Iand¹2ReactorBuildingfirebarriersrequiredtobeupgradedwasexaminedandtheevaluationcriteriaappliedtodemonstratethatfireproofingofthisstructuralsteelisnotrequiredwasdevelopedinthe"SummaryReportforStructuralSteelEvaluation"documentedasEngineeringStudySEA-CE-003.Toclearlydemonstrate.theapplicabi1ityofthiscriteriatothefireareabarriersinquestion:,a'rawingofeacharea,corresponding'totheFireZoneslistedin.Tabl'e1'.0,isattachedtothisdeviationrequestalongwithanareauniquejustificationforeachdrawing.Thesedrawingsshowthebarrierareainquestion,thestructuralsteelmemberssupportingthebarrierandtheprimarycombustiblesrelevanttoeacharea.EachdrawingscorrespondinguniquejustificationreferencesthesectionoftheSummaryReportforStructuralSteelEvaluationthatprovidesthebasisforthatjustification.

jel1n~IIJlgg<'f>'syf+'ll.ill*h(),'i'<)II'III;)(et~'fiCP1C,gpf'lW)Fii)(>l'pj' DeviationRequestNo.6RevisedOctober1986'age2of3CONTROLSTRUCTURE:Automaticdetectionandprotectionisprovidedbelowtheexposedstructuralsteel.Themajorityofthecombustiblesintheareabelowtheexposedstructuralsteelarecables.Themajorityofthecablesarelocatedeitherbelowtheraised(computertype)floorintheControlRoomorin2hourfireratedcablechasesonthenorthandsouthwallsofthecontrolstructurewhereonlyonestructuralmemberiseffected.Thereis-approximately20feetbetweentheraisedcomputerfloorandtheexposedstructuralsteelsupporting.elevation754'-0.Finally,theControlRoomcomprisesthemajorityoftheareabeneaththissteelanditiscontinuallystaffed.dk/d205i:mg jpI\~bWI~Jl~~I*

TABLE1.0DeviationRequestNo.6RevisedOctober1986Page3oE3FIREZONEBENEATHRATEDFLOORSLABUnit1ReactorBuil1-1F1-1E1-3A1-3B-W1-3B-W1-4A-W1-4A-W1-4A-N1-4A-W1"4A-S1-4A-W1-4A-N1-4G1-5A-STOPOFSLABELEVATION683'"0"683'"719'1"719'"1719'"1749'-ln749Ž1"749'-1749Ž1"761'-3.0"779'-1NFPA13SPRINKLERPROTECTIONPROVIDEDNoNoPartialYesYesYesYesYesYesYesDRAWINGREFERENCEC-206006Sht.1C-206006Sht.2C-206007-Shts.1&2C-206021Sht.1C-206021Sht.2C-206008Shts.1&3C-206008Sht.2C-206008Sht.4C-206008Sht.5C-206009Shts.1&2C-206010Shts.162Unit2ReactorBuild2"1F2-lE2"3B-N2-3B-W2-3B-W2-4A-S2-4A-W2-4A-W2-4A-W2-4A-S2-4A-W2-4A-N2-4G2-5C2-5A-S2-5B2-6A683'-00683'-0"719'-1"719'-1"719<-l"749)"1u749'-1"749Ž1",749Ž1"761'"10"7791Ill799'-1"NoNoYesYesYesYes.YesYesYesNoNoC-206011Sht.1C-206011Sht.2C-206012Shts.1&2C-206022Sht.1C"206022Sht.2C-206013Sht.1C-206013Shts.2&3C-206013Sht.4C-206013SIlt.5C-206014Shts.1&2C-206015Shts.l,2&3C-206016Sht.1ControlStructure0-26A)E-N)P)R754'-0"PartialN/Adk/d205ai:mg