ML17264A841

Special Rept:On 970225,declared Sping Air Ejector Radiation Monitor R-15A Inoperable Due to Calibr Activities.Replaced Detector & Cable for Channel 9,tested Satisfactorily & Returned R-15A to Service

ML17264A841
Person / Time
Site:	Ginna
Issue date:	03/24/1997
From:	MECREDY R C ROCHESTER GAS & ELECTRIC CORP.
To:	VISSING G S NRC (Affiliation Not Assigned), NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9704010365
Download: ML17264A841 (5)

Text

CATEGORYREGULATORY INFORMATION DISTRIBUTION YSTEM(RIDS)ACCESSION NBR:9704010365 DOC.DATE:

97/03/24NOTARIZED:

NODOCKETFACIL:50;244 RobertEmmetGinnaNuclearPlant,Unit1,Rochester G05000244AUTH.NAMEAUTHORAFFILIATION MECREDY,R.C.

Rochester Gas&ElectricCorp.RECIP.NAME RECIPIENT AFFILIATION VISSING,G.S.

SUBJECT:

Specialrept:on970225,declared SPINGairEjectorRadiation MonitorR-15Ainoperable duetocalibractivities.

Replaceddetector&cableforChannel9,testedsatisfactorily

&returnedR-15Atoservice.DISTRIBUTION CODE:IE22DCOPIESRECEIVED:LTR ENCLSIZE:TITLE:50.73/50.9 LicenseeEventReport(LER),IncidentRpt,etc.NOTES:License Expdateinaccordance with10CFR2,2.109(9/19/72).

05000244RECIPIENT IDCODE/NAME PD1-1PDINTERNAL:

A~EOgRAB~~ILECENQRRQDEfEEN NRR/DRCH/HHFB NRR/DRCH/HOLB NRR/DRPM/PECB NRR/DSSA/SRXB RGN1FILE01COPIESLTTRENCL'1111111RECIPIENT IDCODE/NAME VISSING,G.

AEOD/SPD/RRAB NRR/DE/ECGB NRR/DE/EMEB NRR/DRCH/HICB NRR/DRCH/HQMB NRR/DSSA/SPLB RES/DET/EIB COPIESLTTRENCL1111-111EXTERNAL:

LSTLOBBYWARDNOACPOOREgW.NRCPDRLITCOBRYCE,JH1NOACQUEENER,DS 1NUDOCSFULLTXT'ENOTETOALL"RIDS"RECIPIENTS:

PLEASEHELPUSTOREDUCEWASTE.TOHAVEYOURNAMEORORGANIZATION REMOVEDFROMDISTRIBUTION LISTSORREDUCETHENUMBEROFCOPIESRECEIVEDBYYOUORYOURORGANIZATION, CONTACTTHEDOCUMENTCONTROLDESK(DCD)ONEXTENSION 415-2083TOTALNUMBEROFCOPIESREQUIRED:

LTTR24ENCL li lNDROCHESTER GASANDElECTRICCORPORATlON

~B9EASTAVENUE,ROCHESTER, N',Yld6d9%01~AREACODE71654627MROSESC,hhECREDYVcePrescentNvcieorOperotions March24,1997Thirty(30)DaySpecialReportInoperable Radiation MonitorR.E.GinnaNuclearPowerPlantDocketNo.50-244U.S.NuclearRegulatory Commission DocumentControlDeskAttn:GuyS.VissingProjectDirectorate I-1Washington, D.C.20555

DearMr.Vissing:

Radiation AccidentMonitoring Instrument R-15Awasinoperable formorethansevendays.Inaccordance withtheGinnaStationOffsiteDoseCalculation Manual(ODCM)Procedure CHA-RETS-ODCM, SectionIII.A.2.a.iv.

andTableIII-2,thefollowing constitutes aSpecialReportoutlining theactiontaken,thecauseoftheinoperability andtheplansandscheduleforrestoring thesystemtooperablestatus.OnFebruary25,1997,at0942EST,SPINGAirEjectorRadiation MonitorR-15Awasdeclaredinoperable forcalibration, percalibration procedure CPI-RAD-MON-SPING4.

Thiscalibration normallytakesmorethanonedaytopeform.Duringcalibration activities onFebruary26,R-15AChannel9(highrangenoblegas)wasexhibiting inconsistent readings.

Furtherexamination revealedalooseconnector betweentheChannel9detectorandthejunctionbox.Tightening theconnector seemedtocorrecttheproblem.Thecalibration continued overthenexttwodays,andnootheranomalies werenoted.OnFriday,February28,whenthecalibration involving thechecksourcesbegan,Channel9againexhibited inconsistent readings.

Resolution ofthisproblemrequiredreplacement ofthedetectorandcableforChannel9.Theseactivities couldbecompleted inlessthanoneday.Thus,overtimewasnotconsidered necessary, andfurtherworkwassuspended fortheweekend.97040i0365'st70324PDRADOCK05000244SPDR Page2OnMonday,March3,acorrective workpackagewaspreparedwhichprovideddirections toreplacetheChannel9detectorandcable.Aftercompleting thecorrective workandpreparing torestoreR-15Atoservice,I&CnoticedthatanotherR-15Achannel(Channel8,gammabackground) wasnotfunctioning asexpected.

Correction ofthisproblemwasestimated tooccurafterthe7dayclockexpired,evenwitharoundtheclockefforts.Thedecisionwasmadetodefercorrective workuntilthenextday,whichwouldextendR-15Ainoperability beyond7days.OnMarch4,thecorrective workpackagewasmodifiedtoincludethereplacement ofChannel8detector.

Thisreplacement proceeded moreexpeditiously thanexpected.

Afterthisdetectorwasreplaced, calibration wascompleted ontheremainder oftheR-15Asystem.R-15Awastestedsatisfactorily.

R-15Awasdocumented asreturnedtoserviceat1049ESTonMarch4,67minutespastthe7daylimit.Verytrulyyours,RobertC.Mecryxc:Mr.GuyS.Vissing(MailStop14C7)PWRProjectDirectorate I-1Washington, D.C.'20555U.S.NuclearRegulatory Commission RegionI475Allendale RoadKingofPrussia,PA19406GinnaSeniorResidentInspector 0Ih'