ML17265A706

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Forwards LER 98-003-02,re Actuations of CR Emergency Air Treatment Sys.All Creats Actuations,Including Those Originally Believed to Be Valid Actuations,Were,In Fact Invalid Actuations
ML17265A706
Person / Time
Site: Ginna Constellation icon.png
Issue date: 07/22/1999
From: MECREDY R C
ROCHESTER GAS & ELECTRIC CORP.
To: VISSING G S
NRC (Affiliation Not Assigned), NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17265A707 List:
References
NUDOCS 9907280113
Download: ML17265A706 (3)


Text

CATEGORYREGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9907280113DOC.DATE:99/07/22NOTARIZED:NOFACXL:50-244RobertEmmetGinnaNuclearPlant,Unit1,RochesterGAUTH.NAMEAUTHORAFFILIATIONMECREDY,R.C.RochesterGas8ElectricCorp..-RECXP.NAMERECIPIENTAFFILIATIONVISSZNG,G.S.

SUBJECT:

ForwardsLER98-003-02,reactuationsofCRemergencyairtreatmentsys.All'REATSactuations,includingthoseoriginallybelievedtobevalidactuations,were,infactinvalidactuations.'DOCKET05000244DISTRIBUTIONCODE:IE22TCOPIESRECEIVED:LTRENCLJSIZE:TITLE:50.73/50.9LicenseeEventReport(LER),IncidentRpt,etc.NOTES:LicenseExpdateinaccordancewith10CFR2,2.109(9/19/72).05000244RECIPIENTZDCODE/NAMELPD1-1PDINTERNAL'/DRIP/REXBRES/DET/ERABRGN1FILE01COPIESLTTRENCL111111~1111RECIPIENTIDCODE/NAMEVZSSING,G.NRR/DIPM/ZOLBNRR/DSSA/SPLBRES/DRAA/OERABCOPIESLTTRENCL11111'11EXTERNAL:LSTLOBBYWARDNOACPOORE,W.NRCPDR111111LMITCOMARSHALLNOACQUEENER,DSNUDOCSFULLTXT111~111NOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE.TOHAVEYOURNAMEORORGANIZATIONREMOVEDFROMDISTRIBUTIONLIS'RREDUCETHENUMBEROFCOPIESRECEIVEDBYYOUORYOURORGANIZATION,CONTACTTHEDOCUMENTCONTRiDESK(DCD)ONEXTENSION415-2083FULLTEXTCONVERSIONREQUIREDTOTALNUMBEROFCOPIESREQUIRED:LTTR15ENCL15 04NDROCHESTERGASANDElECTRICCORPORATION~89EASTAtrrENUE,ROCHESTER,N.Y.Id6d9-OOOIl'OBERTC.MECREDYVicePresidentNvcleorOperotionsAREACODE7165'-2700July22,1999U.S.NuclearRegulatoryCommissionDocumentControlDeskAttn:GuyS.VissingProjectDirectorateI-1Washington,D.C.20555

Subject:

LER1998-003,Revision2,ActuationsofControlRoomEmergencyAirTreatmentSystemDuetoInvalidCausesR.EDGinnaNuclearPowerPlantDocketNo.50-244

DearMr.Vissing:

Inaccordancewith10CFR50.73,LicenseeEventReportSystem,item(a)(2)(iv),whichrequiresareportof,"anyeventorconditionthatresultedinmanualorautomaticactuationofanyEngineeredSafetyFeature(ESF),includingtheReactorProtectionSystem(RPS)",theattachedLicenseeEventReportLER1998-003(Revision2)isherebysubmitted.IthasbeendeterminedthattherewerevariousdegradedcomponentsintheControlRoomRadiationMonitoringsystem.Thesedegradedcomponentsresultedinelectronicspikesinthereadingsonthemonitors.ThehigherconcentrationsofRadonandRadondecayproductscausedthemargintothetripsetpointtobereduced.Thus,inthepresenceofelevatedRadonlevels,theelectronicspikescausedasetpointtobeexceeded.WhenelevatedRadonlevelswerenotpresent,largerspikesalsocausedasetpointtobeexceeded.Thedegradedcomponents,resultinginelectronicspikes,weretherootcauseoftheControlRoomEmergencyAirTreatmentSystem(CREATS)actuations.AllCREATSactuations,includingthoseoriginallybelievedtobevalidactuations,were,infact,invalidactuations.Verytrulyyours,RobertC.MecredF'9907280i13990722PDRADOCK050002448PDR xc:Mr.GuyS.Vissing(MailStop8C2)ProjectDirectorateI-1DivisionofReactorProjects-I/IIOfficeofNuclearReactorRegulationU.S.NuclearRegulatoryCommissionWashington,D.C.20555RegionalAdministrator,RegionIU.S.NuclearRegulatoryCommission475AllendaleRoadKingofPrussia,PA19406U.S.NRCGinnaSeniorResidentInspector