ML17037C461

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Nine Mile Point Nuclear Station, Unit 1 - Letter Transmitting Amendment to the Operating License Consisting of Changes to the Technical Specifications. Changes Increase the Safety Margin for the Isolation Function for the Emergency Condense
ML17037C461
Person / Time
Site: Nine Mile Point Constellation icon.png
Issue date: 09/25/1974
From: Thomas E B
LeBoeuf, Lamb, Leiby & MacRae, Niagara Mohawk Power Corp
To:
US Atomic Energy Commission (AEC)
References
Download: ML17037C461 (12)


Text

0AECDISTRIBUTIONFORPART50DOCKETMATERIAL(TEMPORARYFORM)CONTROLNO:FILE9881FROM:LeBoeuf,Lamb,Leiby,MacRagash35ngtoq~D.C.$0036DATEOFDOC9-25-74DATEREC'D9-25-74LTRTWXRPT,OTHERTO:AECORIG1signedCCOTHERSENTLOCALPDRCLASSUNCLASSPROPINFODESCRIPTION:INPUTXXXNOCYSREC'D40ENCLOSURES:DOCKETNO:50>>220Ltrtransthefollowing..~~AmdttotheOL.~.consistofchangestotheTechspecs...~.ACKNQWT"AGED(40cysenclrec'd)PL'ANTNAMENineMilept,9-26-74JBFORACTION/INFORMATION/DONOTREMOVEBUTLER(L)W/CopiesCLARK(L)W/CopiesPARR(L)W/CopiesKNIEL(L)W/CopiesSCHWENCER(L)W/CopiesSTOLZ(L)W/CopiesVASSALLO(L)W/CopiesPURPLE(L)W/CopiesZIEMANN(L)REGAN(E)W/Copies"W/CopiesDICKER(E)~LEAR(L)W/CopiesW/copiesKNIGHTON(E)W/CopiesW/CopiesYOUNGBLOOD(E)W/CopiesW/CopiesINTERNALDISTRIBUTION~gGC,ROOMP-506A~MUNTZING/STAFFCASEGIAMBUSSOBOYDMOORE(L)(BWR)DEYOUNG(L)(PWR)XKOVHOLT(L)WGOLLER(L)P.COLLINSDENISE+REGOPRFILE5REGION(3)MORRISSTEELETECHREVIEWSCHROEDERMACCARYKNIGHTPAWLICKISHAOSTELLOHOUSTONNOVAKROSSIPPOLITOTEDESCOLONGLAINASBEMAROYAVOLIMERDENTONGRIMESGAMMILLKASTNERBALLARDSPANGLERENVIROMULLERDICKERKNIGHTONYOUNGBLOODREGANHPROJECTLDR~manHARLESSLICASSTDIGGS(L)GEARIN(L)GOULBOURNE(L)KREUTZER(E)LEE(L)MAIGRET(L)REED(E)SERVICE(L)SHEPPARD(L)SLATER(E)SMITH(L)~TEETS(L)WlLLIAIVIS(E)WILSON(L)A/TINDBRAITMANSALTZMANB.HURTPLANSMCDONALDCHAPMANWUBEw/input~.COUPESchemelD.THOMPSON(2)KLECKEREISENHUTEXTERNALDISTRIBUTIONI-LOCALPDR~Osweo~ill.~'I-TIC(ABERNATHY)(1)(2)(10)-NATIONALLABSQl-NSIC(BUCHANAN)1-ASLBP(E/WBldg,Rm529)1-ASLB1-W.PENNINGTON,RmE-201GT1-NewtonAnderson1-B@MSWINEBROAD,RmE-201GT/16-AORSHOLDING1-CONSULTANTSNEWMAPiK'/BLUME/AGBABIANt,I1-PDR-SAN/LA/NY1-BROOKHAVENNATLAB'-G.ULRIKSON,ORNL1-AGMED(RUTH'GUSSMAN)RmB-127GT1-R.D.MUELLER,RmE-201GT

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ARVINE.UPTONEUGENEB~THOMASrJR.LEONARDM.TROSTENHARRYH.VOIGTLEXK.LARSONWASHINOTDNPARTNCRS~~t"UtSheOact(eIFI.AWOFFICESOFLEBOEUF,LAMB,LEIBY8(,MACRAEI767NSTREETrN.W.WAsHINGTQN,D.C.20036September25,1974ONECHASEMANHATTANPLAZANCWYORK,N.Y.IODOSWASHINOTDNTCLCPHDNCZOZ8788BBBCADLCADDRESSLALALVrWASNINOTDND.C.DirectorofLicensingU.S.AtomicEnergyCommissionWashington,D.C.20545P'CPS/(~Re:NiagaraMohawkPowerCorporationDocketNo.50-220Provisional0eratinLicenseDPR-17

DearSir:

AscounselforNiagaraMohawkPowerCorporation,weherebytransmitthree(3)originalsandnineteen(19)copiesofanApplicationforAmendment.totheProvisionalOperatingLicenseintheabove-captioneddocket.Accompanyingthisapplicationareforty(40)copiesofadocumententitled,"ProposedChangesinTechnicalSpecificationsN.ThesechangestotheTechnicalSpecificationsareproposedinaccordancewiththerequirementsofSections50.59(c)and50.90oftheCommission'sRulesandRegulations.Theywouldincreasethesafetymarginfortheisolationfunctionfortheemergencycondensers.rVerytrulyyours,LeBOEUF,LAMB,LEIBY&MacRAEEnclosures'em'@@Sppouzopg><<""><orogpu'oo~~ridCL@IIIotByEugeneB.Thomas,Jr.Partner

/ifr)i'Ir4 (cBEFORETHEUNITEDSTATESATOMICENERGYCOMMISSIONIntheMatterof))NIAGARAMOHAVKPOliERCORPORATION)(NineMilePointUnit1))DocketNo.50-220c8APPLICATIONFORPZKNDMENTTO~pgg)97/Q$WO;g8liRQTCOtk~AhSIO.IR.:gu,atÃ1gsllgcctlroPROVISIONALOPERATINGLICENSENiagaraMohawkPowerCorporation,Licenseeintheabove-captioneddocket,herebyfilesanApplicationforAmendmenttoitsProvisionalOperatingLicenseDPR-17.ThisAmendmentwouldchangetheTechnicalSpecificationswithrespecttotheset-pointforhighsteamflowintheemergencycoolingsystem.h'iththisApplicationforAmendment,Licenseeherebytransmitsadocumententitled"ProposedChangetoTechnicalSpecifications"describingthechangeandthereasonstherefore.TheproposedchangehasbeenreviewedandapprovedbytheSafetyReviewandAuditBoardandtheSiteOperationsReviewCommittee.

%1EREFORE,LicenseepraysasinitsoriginalApplicationforLicenses.Respectfullysubmitted,NIAGARAH011AVKPOWERCORPORATIONPhilipD.RaymondVicePresident-EngineeringSubscribedandsworntobeforemethis<<-dayofSeptember,1974.HELJ.CARRICKNotaryPublicinthoStateofNewYorkQualifiedinOnon.Co.No.452w4b0hlyt.'~~nis~unxxpirusbsarch30,19'7A

~~l'<f't,v~V~...';~~"1'e'l4La'i~g'a'~I ProposedChangestoTechnicalSpecificationsProposedchangestotheTechnicalSpecificationswouldincreasesafetymarginfortheisolationfunctionfortheemergencycondensers.Theoriginalsetpointforhighsteamflowintheemergencycoolingsystemsupplylinewas<29.5psid.Thatsetpointwasestablishedonthebasisofashortradiuselbowinstallation.Afterinitialoperation,acheckofthefabricationdrawingsandfieldmeasurementsindicatedthatalongradiuselbowwasactuallyinstalled.Arecalculationresultsinarevisedsetpointof19psidrepresentingaflowof291percentofmaximumdesigncapacity.Thisrevisedsetpointprovidessufficientcapabilitytoisolatetheemergencycondensersonhighflowduetoalinebreak.Alsosufficientmarginexistssuchthattheunitwillnottripduringnormaloperation.Thehighflowusedforthiscalculationisequivalenttoaruptureof30percentofthepipecross-sectionalarea.

0J NIAGARAHOEKRVPOWERCORPORATIONLicenseNo.DPR-17DoclcetNo.50-220ProosedChanetoTechnicalSecificationsItemLocation~ChaneBasisforSection3.6.2Page95Changethefourthandfifthsentencesinthefirstparagraphtoreadasfollows:"Thehighflowsetpointfortheemergencycoolingsystemsupplylineis19psidifferential.Thisrepresentsaflowofapproximately8.7x105poundsperhouratratedcondition."Table3.6.2cand4.6.2cPage102Changethesetpointunderiten(3)NighSteamFlowEmergencyCoolingSystemto19psidCrom<29.5psid.

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