ML17334A957

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Responds to Request for Further Info Re Generic Ltr 83-28, Items 4.2.3 & 4.2.4.Replacement of Shunt Trip Attachment Will Be Implemented in Appropriate Plant Procedures
ML17334A957
Person / Time
Site: Cook  American Electric Power icon.png
Issue date: 04/22/1986
From: ALEXICH, ALEXICH M P
INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To: DENTON H R
Office of Nuclear Reactor Regulation
References
AEP:NRC:0838Q, AEP:NRC:8380, AEP:NRC:838Q, GL-83-28, NUDOCS 8604250050
Download: ML17334A957 (4)


Text

0~T'REGULATOR'II' XNFGRHATIGN-DIBTRIBUTIGNHYBTEH-<.R-I DB)ACCESSIONS NBR:Bb04250050 DOC.DATE:Bb/04/22NOTARIZED:

NOFACXL:50-315 DonaldC.CookNuclearPowerPlantiUnitI.Indiana550-3kbDonaldC.CookNuclearPowerPlantiUnit2iIndianaAUTH.NAMEAUTHORAFFILIATION ALEXICHXndianaZcNichiganElectricCo.RECIP.NANERECIPIENT AFFILIATION DENTONpH.R.OfficeofNuclearReactorRegulationi Director(post851125

SUBJECT:

RespondstorequestForfurtherinforeQehericLtr8328>Items4.2.354.2.4.Replacement ofshunttripattachment willbeimplemented inappropriate plantprocedures.

DISTRIBUTION CODE:A055DCOPIESRECEIVED:

LTRENCLSIZE:TITLE:OR/Licensing Submittal:

Salem*TMSEventsQL-83-28NOTESRECXPIENT IDCODE/NAl'1E PWR-AADTSPWR-AEICSBPWR-APD4PDOiPWR-APBBINTERNAL:

ADN/LFNBIE/DINRRBWRADTBNRRPWR-AADTS/RBIBREQI04COPIESLTTRENCLRECIPIENTIDCODE/MANE PWR-AEBPWR-AFOBWIdQINQTON>

DPWR-ARBBELD/HDS3IE/DGAVTNRRLASHER'NRRPWR-BADTSNRR/TANBRQN3COPXESLTTRENCLEXTERNAL:

24XNRCPDR02iILPDRNBIC0305TOTALNUNBEROFCOPIESREQUIRED:

LTTR28ENCL I',ValhdWp~V')V...gp,IVWaa~!l'I4i',WI1'VaI,WVa.'IPddW,lIIIIWdWVIIIvQIld,.aladV)I~aW INDIANAgiNICHIGAN ELECTRICCOMPANYP.O.BOX16631COLUMBUS, OHIO43216DonaldC.CookNuclearPlantUnitNos.1and2DocketNos.50-315and50-316LicenseNos.DPR-58andDPR-74ATWSITEMS4.2.3AND4.2.4CLARIFICATION April22,1986AEP:NRC:0838Q Mr.HaroldR.Denton,DirectorOfficeofNuclearReactorRegulation U.S.NuclearRegulatory Commission Washington, D.C.20555

DearMr.Denton:

Thisletterisinresponsetoarequestfromyourstaffforfurtherinformation withregardtoGenericLetter83-28,Items4.2.3and4.2.4.TheseitemsconcerntheReactorTripBreakers(RTBs)andtheirattachments.

Specifically, theseitemsrequirelife-cycle testingoftheRTBsandtheirattachments andperiodicreplacement ofthebreakers, ortheircomponents andattachments, consistent withdemonstrated lifecycles.Life-cycle testingoftheshunttripattachment (STA)andtheundervoltage tripattachment (UVTA)hasbeenconducted byWestinghouse ElectricCorporation, theDonaldC.CookPlantbreakermanufacturer, fortheWestinghouse OwnersGroup.Thistestingspecified anidentical qualified lifeof1250operations forboththeSTAandtheUVTA.Currently, plantprocedures requirereplacement oftheUVTAsafter1250operations.

Althoughnotcontained inplantprocedures atpresent,replacement oftheSTA,basedonthelife-cycle testingperformed byWestinghouse, willbeimplemented intheappropriate plantprocedures.

Therehasbeennolife-cycle testingperformed ontheRTBitself.ThereisnoWestinghouse-recommended periodicreplacement interval.

Thisdocumenthasbeenpreparedfollowing Corporate procedures whichincorporate areasonable setofcontrolstoinsureitsaccuracyandcompleteness priortosignature bytheundersigned.

Verytrulyours,8504250050 850+88lPDR*DOCK050003l5PPDRM.P.AlezchQ$LVicePresident i])wMPA/rjncc:JohnE.DolanW.G.Smith,Jr.-BridgmanR.C.CallenG.Bruchmann G.CharnoffNRCResidentInspector

-Bridgmano<>l)