ML17037B644

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Nine Mile Point Unit 1 - Letter Regarding a Review of Technical Specifications and a Determination That They Do Not Provide Adequate Surveillance Requirements to Assure Safety-Valve Operability and a Request to Submit Proposed Tech Spec. Ch
ML17037B644
Person / Time
Site: Nine Mile Point Constellation icon.png
Issue date: 01/03/1977
From: Lear G
Office of Nuclear Reactor Regulation
To: Rhode G K
Niagara Mohawk Power Corp
References
Download: ML17037B644 (4)


Text

JAHS1977Docket,No.60-220INiagarat/ohawkPowerCorporationATTN:tlr.GeraldK.RhodeVice'President-Engineeiing300ErieBoulevardWestSyracuse,HestYork13202Gentlemen:RE:NIKENILEPOINTNUCLEARSTATIONUNITHO.1WehavenotedapotentialdeficiencyinthenethodbeingusedtoconfirmvalveoperabilityduringperiodictestingofBoilingIlaterReactor(AWR)safety-reliefvalves.Thisdeficiencyconcernstheuseofthesafety-reliefvalvetemperatureindicationasapositivemethodofconfirmationthatasafety-reliefvalveisopenwhenmanuallyactuatedduringsurveillancetesting.Wehavefoundthatanincreasedtemperature'ndicationmaybeobtainedatthesafety-reliefvalveexitwiththesafety-reliefvalveclosed.This-indicatedtemperatureincreaseistheresultofsteamventedthroughthevalveactuationmechanisnduringthesurveillancetest.Inviewofthisfinding,Mehaveconcludedthatatemperatureincreaseatthevalveexit,byitselfdosnotprovideapositivemeansofverificationthatthesafety-reliefvalvehasopened.WehavereviewedvourTechnicalSpecificationsandhavedeterminedthattheydonotprovideadequatesurveillancerequirementstoassuresafety-reliefvalveoperability.Therefore,werequirethatyoueliminatethispotentialdeficiencyinyoursurveillance-testingprogram.Youshouldproposeachangetoyourtechnicalspecificationsthatprovidesapositivemeansofverificationthatthesafety-reliefvalveopenswhentestedaspartoftheAutomaticOepressurizationSystem.Anexampleofanacceptablemethodwouldinvolvethemanualactuationofeachindividualsafety-relikfvalveatoneormorespecifiedpressuresandobservingaspecifiedminimumcompensatingturbinebypassorthrottlevalveclosureorchangeinmeasuredsteamf]owrate.jorr<cc~SURNAME~OATR~NRCFORM518(9-76)NRCM0240AUlsooovRRNMRNTPRINTlffoorrlcElloTb440oc3 TPf NiaqaratfohavikPowerCorporation-2-PleasesubmityourproposedTechnicalSpecificationchangeswithin60daysofyour'eceiptofthisletter.Yoursubmittalshouldincludethebasisforyourproposal,andinparticularshouldaddresstheadequacyofthemethodproposedtopositivelyassesstheopeningofsafety-reliefvalves.Sincere'Jy,George'Lear,CI>iefOperatingReactorsBranch¹3IDivisiOnofOperatingReactorscc:ArvinE.Upton,EsquireLeBoeuf,Lamb,Leiby5HacRae1757NStreet,N.M.DISTRIBUTION:Washington,D.C.20036AnthonyZ.Roisman,EsquireLocalPDRRoisman,KesslerandCashdan102515th'Street,fl,ll.5thFloorGLear'llashington,D.G.20005ttr.EugeneG.Saloga,APPlicantCoordinatN'cGoughNinenile,Po~ntEnerqyInforationCenterOELDP~0.Box81OIgE(3)LycoQing.NewYork13093DElsenhutTBAbernathyJRBuchananACRS(16)FileiOPRICS~BURHAMSWCATS~00TSGHG1//7ORB¹3SNowick1/5/77ORB¹3GLearfA/1//77NRCPORM318(9-76)NRCM0240AUI8,OOVSRHMSHTPRIHTlt(OOIIFICSIIOTSBRIMS'

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