ML17244A558

Forwards Addl Info Re PWR Feedwater Lines in Response to NRC 790525 request.W/3 Oversized Drawings

ML17244A558
Person / Time
Site:	Ginna
Issue date:	06/18/1979
From:	WHITE L D ROCHESTER GAS & ELECTRIC CORP.
To:	STELLO V Office of Nuclear Reactor Regulation
References
NUDOCS 7906210193
Download: ML17244A558 (17)

Text

REGULATORYle<FORMATIONDISTRIBUTIONSYSrM(RIDS)gACCESSIONNBR:7906210193DOC~DATE:79/06/18NOTARIZED:NODOCKET"0F'ACIL:50-240RobertEmmetGinnaNuclearPlantiUnit1pRochesterG05000204AUTH,NAMEAUTHORAFFILIATIONNHITEit~D~RochesterGas8ElectricCorp.RECIP,NAMERECIPIENTAFFILIATIONSTELLOiV,DivisionofOperatingReactorsSUBJECT;ForwardsaddiinforeP>'IRfeedwaterlinesinresponsetoNRC790525request,H/3oversizedrawings,DISTRIBUTIONCODE;A001SCOPIESRECEIYED:LTRENCLSIZE:TITLE:GENERALDISTRIBUTIONFORAFTERISSUANCEOFOPERATINGLICN0TE80~sr~Ž~~y~~m~m~~~j~wek+~~ge/y~~~~yel'pa~~~Qtw~~fyky&4f~~oyelwygmpf~ya\m~g~~~yy~~gowloNwpwohmm~w~~~RECIPIENTRECIPIENTCOPIESID.CODE/NAMEIDCODE/NAME.LTTRENCLACTION:05BCORBWMINTERNAL:01EGFF12I15CORE'ERFBR17ENGRBR19PLANTSYSBR21EFLTTRTSYSEXTERNAL:03LPDR?3ACRS11221111111161602NRCPDRTA/EDO16ADSYS/PROJ18REACSFTYBR20EEB22BRINKMAN04NSIC11111111111111lL>NRS'A~@TOTALNUMBEROFCOPIESREQUIRED:LTTR38ENCL38

'f~v>0tC yViZZZZIiiiiiiiIiiiil(ssisifkl(/iiiiiiiiiiiiiROCHESTERGASANDELECTRICCORPORATIONo89EASTAVENUE,ROCHESTER,N.Y.14649LEOND,WHITE,JR,VICEPRESIDENTTEI.ERIIONCAREACODETld546-2700June18,1979Mr.VictorStello,Jr.,DirectorU.S.NuclearRegulatoryCommissionDivisionofOperatingReactorsOfficeofNuclearReactorRegulationWashington,D.C.20555

Subject:

VictorStello,Jr.letterdatedMay25,1979XnformationRequestedonPWRFeedwaterLinesR.E.GinnaNuclearPowerPlant,UnitNo.1DocketNo.50-244

DearMr.Stello:

Enclosedisacopyofourresponsetothesubjectletter.Verytrulyyours,PL.D.White,Jr.Enclosure tI44>v)~e,I ResponsetoVictorStello,Jr.LetterDatedMay25,1979InformationRequestedonPWRFeedwaterLinesR.E.GinnaNuclearPowerPlant,UnitNo.1DocketNo.50-244DesicenGilbertAssociatesdrawingD-304-083showsplanviewsofthemainfeedwaterpipingtosteamgeneratorsAandBinsidecontainment.TheelevationviewsareshowninSectionsD-DandA-AonGilbertAssociatesdrawingD-304-084.PipesupportsFW-1,2,4,6,10,81,80,8and7arespringhangers.PiperestraintsFW-3,5,and9aresnubbers.Therearenovalveslocatedinthemainfeedwaterpipinginsidecontainment.DetailsofthepipeandfittingsarecontainedinGilbertAssociatesLineSpecificationNo.900-1.Copiesofthedrawingsandlinespecificationareenclosed.2.(a)TheresultsoftheoriginalpipingstressanalysesforGinnaStationmaybefoundinaJune9,1969submittaltotheAECentitled"AdditionalInformationonSeismicDesignofClassIPiping".Additionalstressanalysesofthemainfeedwaterpipinginsidecontainmentwereperformedin1973and1976.Asummaryofthestressescalculatedinthemostrecentanalysesisshownbelow:ThermalStressPressureStressDeadweightStressSG1AMaximum3979psi2858psi480psiNozzle14882858250SG1BMaximum38462858695Nozzle11842858388(b)FatigueanalyseshavebeenperformedforportionsofthemainsteamandfeedwaterpipingatGinnaStation.However,themainfeedwaterpipinginsidecontainmentwasnotincludedintheseanalyses.FabricationH~istor1.(a)ThefeedwaterringandthermalsleevematerialisASTMA106GradeB.(b)ThesteamgeneratorfeedwaternozzlesareSA336,CodeCase1332,Para.5a-5d.Thismaterialwaslaterincorpo-ratedintheCodeasSA508Class2.(c)ThemainfeedwaterpipingisASTMA106GradeC,seamlesspipewithASTMA234GradeWPBpipefittings.

CA1A)/JlvCIIJ'I 2.(a)Feedwaternozzletopipeelbowweldsweremadeusinggastungstenarcwelding(GTAW)withabackingringfortherootpassandshieldedmetalarcwelding(SMAW)forcom-pletion.ThefillermetalwasE7018.Preheatwasmain-tainedat>200'Fandpostweldheattreatmentwasat1150'F+25'F.TheweldendswereaJ-groovewitha1/16inchlandasshownindetailGofdrawingD-304-084.(b)PipingweldsmadeusingGTAWwithaKinsertfortherootpassandSMAWforcompletion.ThefillermetalwasE7018.PreheatwasmaintainedatP75'Fandpostweldheattreat-,mentat1150'F+25'f.Theweldendswerecompoundgroovewitha1/16inchlandasshownonGilbertAssociatesdrawingB-312-003.(c)Thespargerhasathermalsleevewhichisinstalledintothefeedwaternozzleusingapressfit.3.Thefeedwaternozzletoelbow,elbowtoreducer,andreducertopipingweldsateachsteamgeneratorwereradiographicallyexaminedfollowingoriginalfabrication.ThoseradiographswererecentlyreviewedandfoundacceptableasindicatedintheattachedlettertoJohnC.NoonfromAlbertE.CurtisdatedJune1,1979.4~5.ThefeedwaterpipingwasfabricatedtotherequirementsofASACodeforPressurePiping,B31.1-1955.FeedwaterpipingwasspecifiedasseamlessASTMA106-64GradeCwithsupplementarytestsS2,S3,andS4tobeperformedon'bothendsofonelengthfromeachheat..Preservice/InserviceInsectionand0eratinHistor2.(a)ApreserviceinspectioninaccordancewithASMEBEPVCode,SectionXIwasnotperformed.Hydrostatictestingandradiographicexaminationofthefeedwat,erpipingweldsasindicatedinitemB-3abovewasperformed.TheBsteamgeneratorfeedwaternozzletopipeelbowweldwasexaminedin1976usingthemagneticparticletechniqueandfoundacceptable.(b)The14inchreducertopipeweldneartheBsteamgeneratornozzlewasradiographicallyexaminedin1973andultra-sonicallyexaminedin1976followingwaterhammerandvibrat,ionproblemsdiscussedbelow.Theweldswerefoundtobeacceptable.3.(a)Thefeedwaternozzletoelbow,elbowtoreducer,andreducertopipeweldsateachsteamgeneratorandthetwofeedwaterpipetocontainmentpenetrationweldswillberadiographicallyexaminedduringthe1980refuelingoutage.Theremainderofthefeedwaterpipinginsidecontainmentwillbeexaminedoverthelifeoftheplant.asrequiredbyASMEBGPVCodeSectionXI.

o)'!x,I41N'EP'S'I1l Thefeedwaterpipingweldsoutsidecontainmentarebeinginspectedinaccordancewiththe"InserviceInspectionPlanforHighEnergyPipingWeldsatRobertE.GinnaNuclearPowerStation".Allweldsinthisprogramhavebeenpreviouslyinspectedatleastonce.Alldesignbasisbreaklocationswillbeexaminedoncemoreduringthe10yearinspectioninterval.Two(2)transientswhichcouldbecharacterizedas"waterhammer"haveoccurredinthefeedwatersystematGinnaStation.ThefirsttransientoccurredonJuly22,1973andwasreportedtotheU.S.AtomicEnergyCommissioninaletterdatedAugust21,1973toMr.JohnF.O'eary,Director,DirectorateofLicensing.ThesecondoccurredonJune17,1975andwasreportedtotheU.S.NuclearRegulatoryCommissioninaletterdatedJuly17,1975toMr.RobertT.Carlson,Chief,FacilitiesConstructionandEngineeringSupportBranch,RegionI.FlowinducedvibrationofthesteamandfeedwaterpipingatGinnaStationwasexperiencedduringthefirstfewyearsofplantoperation.Anextensiveprogramofvibra-tionmonitoring,fatigueanalysis,andmodificationwasperformedtoresolvethisproblem.Themodificationsincludedupgradingaswellasadditionofpipesupportsandrestraints.Theresultsoftheanalysesshowedthattheadditionalstressesduetoflowinducedvibrationscouldsafelybeaccommodatedbytheaffectedpipingsystems.TherehavebeentwotypesoffeedwatercontrolusedatGinnaStation.FromstartuptoJanuary1978hydrazineinjectionwasusedtocontrolpHandoxygen.In1978afullflowdeepbedpolishingsystemwasputonlineandpHcontrolwaschangedtoNH4OHaddition.Thecontrolparametersremainedessentiallythesameforbothperiods:1.pH2.dissolvedoxygen3.N2H48.8-9.20-5ppb5-20ppbFromstartupuntilNovember1974smallcondenserleaks(C0.25gpm)weretolerateduntilrepairscouldbemadesincesodiumorchlorideconcentrationincreasesweresmall((1ppb).FromNovember1974untilJanuary1978allvolatiletreatmentwasusedandanydetectableleak(<200cc/min)wasrepairedwithin24hours.Since1978thepolishershavebeeninservicecontinuously.

~4E SP-529112-23-664:2LineSecificationsLineSecificationNo.900-1Rating:1550psig/450~FService:FeedwaterSteamGeneratorVentSteam~PieSeamlessCarbonSteel,ASTMA106-64,GradeC8"andlarger-Schedule1006"andsmaller-Schedule80SupplementarytestsS2,S3andS4shallbeperformedonbothendsofonelengthfromeachheatonallsizes2-1/2"andlarger.F~ittins2-1/2"andlarger-CarbonSteel,ASTMA234,GradeWPB,samescheduleaspipe,buttweld2"andsmaller-Forgedcarbonsteel,ASTMA234>GradeWPBy3000PSIpsocketweldJoints2-1/2"andlarger-Buttweld2"andsmallerFlanged-Socketweld-ForgedCarbonSteel,ASTMA105-64,Grad'eII,2-1/2"andlarger-900j/R.F.weldingneck2"andsmaller-15008socketweldGaskets-FlexitallicgasketStyleCGType304SSandasbestosfillerStudBoltsHexNuts-ASTMA193-62T,GradeB7-ASTMA194-62T,Grade2GILBERTASSOCIATES,INC.

SP-529112-23-66ValvesLineSecificationNo.900-1(Cont'd.)RatingEndsConstructionBodyBonnetStemSeating.2"andSmaller600PSISocketWeldOSS(YASTMA105GradeIIBoltedASTMA182GradeF6Stellite2-1/2"andLarer900PSI'uttWeldOSRYASTMA216,GradeWCBPressureSealASTMA182,GradeF6StelliteGILBERTASSOCIATES,INC.

0RochesterGasandElectricCorporationInter-OfFiceCorrespondenceJune1,1979$UgJQQTReviewofFeedwaterPipingtoSteamGeneratorNozzlesRadiographsTO:JackC.Noon,AssistantSuperintendent-GinnaStationOnMay31,1979theradiographsofthefeedwaterpipingtosteamgeneratornozzleweldsforboththeAandBSteamGeneratorwerereviewedtoverifyweldqualityandthattherearenotanystressrisersassociatedwithoriginalendprep,theweldsreviewedwereasfollowsandareshownontheattachedFiguresB-12andB-13:'AS/GFW1001EESFW1001DD10SFW1001DD918"elbowtonozzle18."elbowtoreducerReducerto14"'pipeBS/GFW1005-BB~SFW1005-AA7SFW1005-AA618"elbowtonozzle18"e.lbow.toreducerReducerto14"pipeTheresultsofthisreviewwereverygood.Theseweldsareofexcellentqualityandtheweldendprepsshowasmoothcontourwhencomparingrelativedensitiesacrosstheweldroottotheendoftheweldprep.Therefore,I.wouldcon-cludethattheseweldsareinstalledasdesignedandwouldnotdevelopasimilarproblemashasbeenfoundattheD.C.CookNuclearPlant.Ifyouhaveanyfurtherquestions,pleasecontactme.AlbertE.CurtisIIIWelding6NDEEngineerLevelIII,RT.AEC:dmaE2xc:L.D..White,Jr.L.S.LangB.A.SnowJ.E.Arthur~.R;":Schuler'.C.HustonC.R.AndersonM.J.Saporito H~I FWIOOIXFW1001WFWIOOIZ3-PHFW1001Z3FWIOOIZZFW1001ZIFW1001YFW100124FW1001AAFW1001AAPSSFW1001882-PHSFW1001883FWloolCCFW1001CCPHSFW1001CCISFW1001CC2Og4eFW10012FW100188SFWIOOI882SFWIOOI003SFW1001DD3-PHSFW1001DD4SFWIOOIDD5SFW10010064'pCg/pSFW1001CC2PHFW1001ODFW1001DDPHSFW1001DDISFW1001Oo2SFW1001EESFW1001DDIO/ehISX14REDUCERNOMNALDIAMETERSCIIEOILENNAIMLTHICIQIESSMATERIALSTANNRD14IB1001000.8381.156C/8I4FEEDWATERLOOPASFW1001009/ySrwIOOIOOBSFW1001ODTFEEOWATERR.E.GINNAF.CASTRO.30MAY75A-3084950FIGURE8-12 V~

NOMBIALIXAMETERSCHEOVLEHOMINALTHICKNESSMATERIALsfnenko1418"1001000.9581.156C/5C/5SFW100$Aafrw1005-nn-psSFW1005AAIFW1005-AASFW100$AA2SFW1005-21FW1005-WPl1FW1005WFW100$-V-PSsTEAMGENERATORFW100588sFwloosAABSFW1005AASSFW1005-AA4SFW1005-AnsSFW1005-Y2I'W100$-YlFW1005-YSFW1005-X2IB18XI4REOVCERPEH.404CONf.ONSIEET2FW1005WIFW1005XSFW1005-XIFW1005-2SFW1005-Y2-PHSFWICOS-XI-PHX=SUPPORTMEMBERl4FEEDWATERLOOPBINSIDECONTAINMENTSIIEETIOF2FEEOWATERILE.GINNAF.CASTRO29MAY75A-3084948FIGURE8-13