ML17207A347
| ML17207A347 | |
| Person / Time | |
|---|---|
| Site: | Millstone, Calvert Cliffs, Palisades, Saint Lucie, Arkansas Nuclear, Maine Yankee, Fort Calhoun  |
| Issue date: | 08/29/1979 |
| From: | LIEBLER G E ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY, EMVC-EPS |
| To: | STELLO V NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| NUDOCS 7909040506 | |
| Download: ML17207A347 (5) | |
Text
R'EGULATVRYINFORMATION0ISTRIBUTIONSYSTEM(RIOS3ACCESSTQNNBA'7909040500C,DATE:79/08/29NQTANINQFACIL!50?55PalfsadesNucearPlantiConsumersPowerio,502SSFortCalhounStatfon~UnftlpOmahaPuolfcPo~erOfst50309HafneYankeeAtomfcPowerPlantiNafneYankeeAtomfcAUTH~NAFKAUTHORAFFItZATIONLIEBLERrG~E~CKPowerSystemsRECIP4ANERKCIPIEN7AFFILIATIONSTELLO.V.OttfceofZnspectfon&Enforcement
SUBJECT:
ForwarddsproptfetaryversfonofCENLI5PiresponsetoIKBulletfn79-0oCfgemsZ&5~Responsewfthheld(refZ0CFRZ.V90).OOCKKT,¹05000255(05000ZSS05000~09~Siteoa~+4t'e44rg~gBig$SNITOZSTRIBUTZONCOOK>>ZZZLSCOPIESRKCKIVKO!LTR~KNCLSIlE~~~TITlE>>>>>>>>>>*>>>>>>*>>SpecfalOfstrfoutfon>>+*>>>>>>+>>>>>>+g.44$LNOTESE/7/CCWd7dgfQE~.~f'/:M4fftf8KCIPZENT'OPZESZOCOOK/NARKITTRENCLPC~Ng!~ARC,P4R>++P~ggevxe<~~RosSIseR<<+JPo~~r~~:geeIRECIPIENTZQCOOK/NAHE.COPIESC-~~F~ggER'.L.TTRKi4ClglSg$N-AÃtf-,PI4He.$',yg,yp+~<of~e$s~p/7~a,a~~K',:-et+lop'gASs,'?790C'-?ArgoSS5~ta@AlL/A'TAL~UMBEROFCOPIES~EUIRKO:LT-,R0E~CL0 August29,1979Mr.VictorStello,DirectorOfficeofInspection8EnforcementU.S.NuclearRegulatoryCommissionMashington,D.C.20555
Subject:
ThirtyDayResponsetoIEBulletin79-06CDockets:50-335{FPSL),50-317and50-318(BGSE),50-368(APSL),50-309(MY),50-336(NEUtilities),50-255(CPCo.)and50-285(OPPD)
Enclosures:
(1)CEN-115-P,ResponsetoNRCIEBulletin79-06CItems2and3forCombustionEngineeringNuclearSteamSupplySystems(Proprietaryversion,copy80000/4through00002G)(2)CEN-115-NP(NonProprietaryversionofEnclosure(1)){3)ProprietaryInformationAffidavitforCEN-115-P
DearMr.Stello:
Enclosures(1)and(2)areforwardedforyourreview.Pleasenotethatthisreportconstitutestheresponsetotheshorttermactionitemsnumber(2)and(3)ofIEBulletin79-06C.TheinformationpresentedinCEN-115-PisgendricinnatureandappliestoalloperatingC-Edesignedreactors.Theresultsofanalysiscontainedintheattachedreportindicatetheneedtotripreactorcoolantpumpswithinapproximately10minutesforasmallsubsetofsmallbreakLOCA's.InresponsetoLongTermActionItem1ofIEBulletin79-06C,weconsideritprematuretoproposeadesignforauto-matictrippingofRCPs.Thebasesforthisconclusionare:(1)BestEstimatecalculationswithbothHPSIpumpsshownoneedforpumptripping.(2)Analyticalmodelingoftheseeventsisevolvingandmayalterconclusions.(3)Theidentifiedsmallbreaksofconcernrepresentasmallsubsetoftheentirebreakspectrum.{4)Otherdesignalternatesexisttoprovideequivalentcoreprotection.ItisjudgedthattheguidelinesprovidedinresponsetoBulletinItem3provideadequatecoreprotection.Mewillcontinuetocloselymonitoralldevelopmentsonthissubjectsothattheseguidelinescontinuetoensuresafeplantoperation.~PpOpOvouo604
- r.
DuetotheproprietarynatureofsomeofthematerialcontainedinCEN-115-P,werequestthatitbewithheldinaccordancewithprovisionsof10CFR2.790andthatthismaterialbesafeguarded.Thereasonsfortheclassificationofthismaterialasproprietaryaredelineatedintheenclosedaffidavit.FivecopiesofbothEnclosures(1)and(2)areincludedwiththisletterforimmediatedelivery.Thirty-fiveadditionalcopiesofEnclosure(1)andfifteencopiesofEnclosure(2)willbeforwarded,viatheregularmailservice.Shouldquestionsariseconcerningthisreport,pleasefeelfreetocontactmyselfat(305)552-3811orMr.KenMorrisofOmahaPublicPowerDistrictat(402)536-4504.Sincerely,8~7GeorgeE.Liebler,ChairmanC-EOwnersGroupcc:Dr.D.F..Ross,Manager(w/oattach)Bulletins5OrdersTaskForce~~Mr.I.Villalva,(with'attach)DrHaroldDenton(w/oattach) go-arSMS/Sot'OCKETNO.93$/gagDATE:J3CNOTETONRCAND/ORLOCALPUBLICDOCUMENTROOMSfromThefollowingitemsubmittedwithletterdated-a-9isbeingwithheldfrompublicdisclosureinaccordancewithSection2.790.PROPRIETARYINFORMATIONDistributionService'sBranch