ML17334B040

Informs That Valves 2-WMO-724 & 2-WMO-726 Will Not Be Removed from Environmentally Qualified Equipment List Contrary to 860530 Response to NRC Audit.Valves Meet Criteria for Environmentally Qualified Equipment

ML17334B040
Person / Time
Site:	Cook
Issue date:	01/21/1987
From:	ALEXICH M P INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17324B267	List: ML17324B266 ML17334B017 ML17334B040
References
AEP:NRC:0775AK, AEP:NRC:775AK, NUDOCS 8701280418
Download: ML17334B040 (5)

Text

'REGULATORY~ORNATIONDISTRIBUTIONSY~N(RIDS>ACCEHSiCAqNBR:8701280418DOC.DATE:87/01/21NOTARIZED:NODOCKET¹FACIL:50-315DonaldC.CookNuclearPowerPlantiUnitiiIndiana00500031550-316DonaldC.CookNuclearPotuerPlantiUnit2iIndiana505000316AUTH.NAl"fEAUTHORAFFILIATIONALEXICH>N.P.IndianaZcNichiganElectricCo.RECIP.NAMERECIPIENTAFFILIATIONRecordServicesBranch(DocumentControlDesk>

SUBJECT:

InformsthatValves2MNO7248(2WNO726lllillnotberemovedPromenvironmentallyqualifiedequipment)istcontraryto860530ltr.Valvesmeetcriteriaforenvironmentallgqualifiedequipment.DISTRIBUTIONCODE:A048DCOPIESRECEIVED:LTRIENCL~SIZE:TITLE:OR/LicensingSubmittal:EquipmentQualificationNOTES:REClrIENT.IDCODE/NANEPWR-AADTSPWR-APD4LAMIQQINQTON,D01COPIESLTTRENCLRECIPIENTCOPIESIDCODE/NANE,LTTRENCLPWR-AEB1PWR-APD4PD12,1INTERNAL:ADN/LFNBELDSHIELDS'NRR/GRASCARTEREXTERNAL:LPDRNSICELD/HDS3QNRCPDR12,1131041021TOTALNU<BEROFCOPIESREGUIRED:LTTR15ENCL iv"rII~V1Vvt$,IIIIll1lllg~j(illIP.Iz.<r<<Ir1IIvvl1'i,'III4gingI1$v)wlIlIg)v'lp1v0~V~PvII'I~p'l,,t~g INDIANA8MICHIGANELECTRICCOMPANYP,O.BOX16631COLUMBUS,OHIO43216January21,1987AEP:NRC:0775AK10CFR50.49DonaldC.CookNuclearPlantUnitNos.1and2DocketNos.50-315and50-316LicenseNos.DPR-58andDPR-74ENVIRONMENTALQUALIFICATIONOFLIMITORQUEVALVESU.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,D.C.20555'earSirs:InourletterofMay30,1986werespondedtoissuesraisedduringtheNRCauditofourElectricalEquipmentEnvironmentalQualificationprogram.OneoftheissuesconcernedtheresultsofourinspectionoftheinternalwiringofLimitorquevalveoperatorswitches.Thisinspectionwasconductedbecauseofreportsthatotherutilities-hadfoundundocumentedwire(potentiallyunqualified)insidetheLimitorqueswitches.AtthetimeoftheauditofourEnvironmentalQualificationProgramwehadfoundthreevalves(D.C.CookTagNos.2-WM0-714,2-WM0-724,and2-WMO-726)thatcontainedundocumentedwiring.Aspartofourinspectionplan,thesewireswerereplacedwithqualifiedwire.Followingthediscoveryoftheundocumentedwiring,anassessmentwasmaderegardingthereportabilityoftheeventundertheprovisionsof10CFR50.73.Ourjudgement,'asedonthematerialwhichwasreviewedatthattime,wasthatthesevalveswerenotinanareawhichwouldbesubjectedtoaharshenvironment,asdefinedin10CFR50.49,followinganaccident.Thus,theywerenotrequiredtobeenvironmentallyqualifiedandweretoberemovedfromtheMasterEnvironmentallyQualifiedEquipmentList.ThisjudgementwasincludedasAttachment8toourletterofMay30,1986anditisalsodocumentedasPotentialEnforcement/UnresolvedItemNo.6inInspectionReportNos.50-315/86015and50-316/86015.Asubsequentletter,AEP:NRC:0775AH(datedAugust27,1986),andInspectionReport50-315/86033and50-315/86033alsoaddressthisissue.Sincethetimeoftheaudit,wehavebeenreevaluatingtheenvironmentalconditionswhichwouldexistintheareaswhichcouldpotentiallybeexposedtoahighenergylinebreak.Ofparticularconcernwasthefactthatasteamleakresultingfromacriticalsizecrackcouldgoundetectedforaconsiderabletimeperiod.Asaresultofthisreview,whichincludesapreliminarycalculationfortheareainwhichvalves2-WMO-724and2-WMO-726arelocated,wemustchangeourpreviousconclusionforthesetwovalves.(Theconclusionremainsvalidfor2-WM0-714.)8701280418870121PDRADOCK05000315PDR V.

8r."HaroldR.Denton-2-AEP:NRC:0775AKThesetwovalvesarelocatedoutsidecontainmentinthedieselgeneratorpipetunnel.Thistunnelcontainsafour-inchsteamlinethatsuppliestheturbine-drivenauxiliaryfeedwaterpump.Shouldacriticalsizecrackdevelopinthispipingsection,itcouldgoundetectedforaslongaseighthoursbecausetheareaispatrolledonlyoncepershift.Duringthistime,thetemperaturewouldincrease,anditisjudgedthattheresultingconditionswouldmeetthe10CFR50.49definitionofaharshenvironment.Forthisreason,thesetwovalveswillnotberemovedfromtheenvironmentallyqualifiedequipmentlist.SincethereplacementoftheundocumentedwiresduringMarch1986,thesevalveshavemetthecriteriaforenvironmentallyqualifiedequipment,andtheirqualificationwillbemaintainedfollowingexistingprocedures.ThismatterwasdiscussedwithbothyourstaffandtheNRCRegionIIIstaff.Duringthecourseofthediscussion,westatedthatwebelievedthatthejumperwireswerenotunqualified,butonlylackedqualificationdocumentation.Tosubstantiatethisbeliefweintendtosubjecttheundocumentedjumpercablestotheappropriatetesting.Thetestprogramiscurrentlyunderdevelopment.WeanticipatethatourplansandschedulesforsuchtestingwillbecompletebyFebruary28,1987.ThisdocumenthasbeenpreparedfollowingCorporateprocedureswhichincorporateareasonablesetofcontrolstoinsureitsaccuracyandcompletenesspriortosignaturebytheundersigned.VerytrulyyoursP.Aexich)QVicePresidentcc:JohnE.DolanW.G.Smith,Jr.-BridgmanR.C.CallenG.BruchmannG.CharnoffNRCResidentInspector-BridgmanJ.G.Keppler-RegionIII