ML17037B552

Nine Mile Point Unit 1 - Letter Responding to 04/06/1976 Letter Requesting Radioactive Methyl Iodide Decontamination Test Information for the Emergency Ventilation System

ML17037B552
Person / Time
Site:	Nine Mile Point
Issue date:	06/02/1976
From:	Rhode G K Niagara Mohawk Power Corp
To:	Goller K R Office of Nuclear Reactor Regulation
References
Download: ML17037B552 (12)

Text

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F.NCLOSURE RESPONSES TOAPRIL6p1976NRCQUEST10NS......

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~~~~~yf NIAGARAMOHAWKPOWERCORPORATION NIAGARA~MOHAWK300ERIK60ULKVARD WESTSYRACUSE, H.Y.13202'8Kw~June2,l976Uo$IPJCISARRICIMT02T, COhNISSlOIIhe/Rdl2TDirectorofNuclearReactorRegulation Attn:Mr.KarlR.Goller,Assistant DirectorDivisionofOperating ReactorsU.S.NuclearRegulatory Commission Washington, D.C.20555Re:NineMilePointUnitDocketNo.50-220DPR-63

DearSir:

YourApril6,l976letterrequested radioactive methyliodidedecontamination testinformation fortheEmer-gencyVentilation SystematNineMilePointUnitl.Theattachedresponses addressthequestions contained in'thatletter.Sincerely,NIAGARAMOMWK"POWERCORPORATION EMERALDKODEVicePresident

-ngineering

/szAttachment 5888

$~y'lgfcmw<g'I~%4ILhpICll RESPONSES TOAPRIL6Il976NRCQUESTIONS NINEMILEPOINTUNITlDOCKETNO.50-220DPR-63R~euest1Thedatethesampleof'harcoal wasobtained, andthemethodunderwhichitwasobtained(eg,canisterandgrainthief').a.l0/29/73-Cartridge, Emergency Ventilation Systemb.l0/27/75-Cartridge, Emergency Ventilation SystemR~euesL2Thetimeintervalthecharcoalhadbeeninstalled inthesystem,andtheapproximate numberofhourstheappropriate ESFsyst'mhadbeeninoperation withthetestedcharcoal.

Resonse2Thesampleswereobtainedbyremovalofcartridges installed atthetimeoftheinitialbedloading.Thecartridges contained charcoalfromthatloading.Initialplantcriticality wasachieved9/5/69.a.Timeinterval:

'0/29/73sample:Approximately fourcalendaryearsl0/27/75sample:Approximately sixcalendaryears

b.approximate numberofhours:Priorto10/29/73sample:10hrs/yearx5years*=50hoursPriorto10/27/75sample:50hrs(priorto10/73sample)+10hrs/yrx2yrs(testing)

+20hrs(purgepriorto1974outage,est.)+41hrs(purgepriorto1975outage,actual)131hours.s*Includes initialplantstartuptimeplusfourcalendaryears.~ReuesC3Thelaboratory thatperformed theradioactive test.NuclearContainment Systems,Inc.P.O.Box19827Columbus, Ohio43129(614)252-1420R~euese4Thetestagent(ie,elemental iodineormethyliodide).Resonse4a.10/'29/73

-Elemental iodineandmethyliodide'b.10/27/75-Methyliodide

R~euest5Thetestconditions (eg,temperature, relativehumidity, inletconcentration anddurationoftest).TestresultsshouldindicatewhetherRDTM16-ITprocedures werefollowed.

Thetestconditions ofRDT816-IT,including temperature, relative'humidity, inletconcentration andtestduration,werefollowedusingthefollowing options:a.10/29/73sample:25Cgambientpressure, 70~relativehumidityb.10/27/75sample:190F,oneatmosphere, 958relativehumidity~Reuest6Theremovalefficiency

obtained, andtheexperimental error(ifknown).a.10/29/73Emergency Ventilation SystemCartridge 81"depth99.96'.iodineremoved92.W'ethyliodidedecontaminated 82"depth100.000iodineremoved99.0Cmethyliodidedecontaminated 10/27/75II11Emergency Ventilation SystemCartridge 82"depth97.82K'ethyl iodidedecontaminated Theexperimental errorwasnotknown.

R~euest7Anyunusualoperation conditions orotherinformation youmayconsideruseful.None.

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