ML17138B779

Reactor Pressure Vessel Internals Vibration Test.

ML17138B779
Person / Time
Site:	Susquehanna
Issue date:	10/30/1980
From:	BUCCO J, MUTES K E PENNSYLVANIA POWER & LIGHT CO.
To:
Shared Package
ML17138B780	List: ML17138B779 ML18017A175
References
TP-2.16, TP-2.16-R2, NUDOCS 8102090458
Download: ML17138B779 (15)

Text

TESTREPORTTP2.16-Rev.2REACTORPRESSUREVESSELINTERNALS VIBRATION TESTPennsylvania PowerandLightCompanySusquehanna SteamElectricStationBerwick,Pennsylvania UnitIPreparedby:/Zo'SystemStartupEngineerDateSternStartupEngineerDate I.Introduction andTestSummarTheReactorPressureVesseIInternals Vibration Testwassuccessfully com-pletedattheSusquehanna SteamElectricStationonOctober10,1980.Thepur-:poseofthistestwastorevealloosepartsorassemblyerrorswhichcouldcausevibration ofreactorinternals.

Thiswasaccomplished byoperating theRecircu-lationsystematratedvolumetric coreflowandperforming aninspection programtodetermine theeffectsofthevibration induced.TheVibration Testconsisted ofapreinspection, flowtesting,andapost-inspection whicharesummarized insectionsII,V,andVIrespectively.

Following thepreinspection andpreceding theflowtest,datawastakenforthecompletion oftheReactorRecirculation systemflowtesting(TP2.20).TP2.20willbeat-tachedtotheReactorRecirculation Preoperational TestP64.1.Duringtheperfor-manceofthisflowtestingthetemporary manwayaccesscoverlocatedbelowthe"B"Recirculation suctionpipewasdislodged fromtheshroudsupportplateandbecamewedgedinthe"B"loopsuctionpipeimmediately beforethesuctionvalve.AdetailedaccountofthisproblemisgiveninsectionIII.Atthispoint,Recirculation FlowTestingwasstoppedandtheReactorpressurevesselhydrowasperformed.

Whenthehydrotestwassuccessfully completed, thereactorvesselwasdrainedandtheRPVheadandshroudheadwereremovedtofacil-itateaninspection ofthedamagecausedbythemanwaycover.Themanwayaccesscoverandattaching hardwarewereretrieved fromthevesselandareinspection wasperformed assummarized insectionIVofthisreport.Thevesselwasthenfilledandtheheadwastensioned.

The'lowTestwascompleted andthepost-inspection wasperformed.

4.Acopyoftheprocedure containing datataken,graphsandphotosisincludedasAttachment IalongwithNon-Conformance Reportsissuedduringthistest.(Attachment 2).II.Pre-InsectionApreflowtestinspection wasconducted onthereactorvesselinternals toestablish thecondition ofeachcomponent examined.

Theinspection pointsaredefinedinsection'7.1oftheattachedprocedure.

Theinspection teamconsisted oftwoengineers, oneQCInspector andaphotographer.

Aseparateinspection wasperformed byGeneralElectricI&SE.Droplights, flashlights, inspection mirrorsanda35mmcamerawereusedduringtheinspection.

Allequipment takenintothevesselwasattachedtothepersonusingittomaintainvesselcleanliness.

Are-marksheet(Appendix J)ofeachareainspected alongwithphotographs areincludedaspartofAttachment 1.Sincetheguidetubeswerenotinstalled, itwasrecommended bytheGeneralElectricOperations Managerthatacompleteinspection ofallincoreguidetubestabilizers beperformed.

Onlytheperipheral stabilizers wererequiredtobeinspected bytheGeneralElectricPreoperational Specification 22A227IAX/Rev'.

0Twomissingtackweldsandoneporousweldwasobservedon'thisinspection.

Thelocationof"theseweldsarenotedontheremarksheetforstep7.1.2oftheat-tachedprocedure.

Threecrackedandtwoporousweldswereobservedonthecore(,Page2of6 Isprayspargernozzlesatlocations listedonremarksheetforstep7.1.18.Theseweldswererepairedandreinspected beforethestartoftheVibration Test.Aftercompletion ofthepreflowinspection, thetemporary manwayaccesscoverslocatedbelowtherecirculation loopsuctionlineswereinstalled ontheshroudsupportplate.Theshroudheadwasinstalled andtorquedto50ft/lbs.

III.ReactorRecirculation FlowTestinFollowing thepreflowinspection, thevesselwasfilledtotwofeetbelowtheflange.Datawastakenforthecompletion ofReactorRecirculation Flowtesting(TP2.20).Thefollowing testswereperformed:

M-Gsetcontroller tun-ing,limiter/31&f!2runbacks, scooptubelock,cavitation searchfor"A"and"B"pumps,instrument calibration checksandventing,andRPTtripsat30,50and80Xpumpspeeds.InordertoreachthepumpspeedsrequiredforRPTtripsandlimiterrunbacks, thevesselwaspressurized to100psiwithinstrument airthroughtheheadventtemporary manifoldsupplyline.Reactor.vesselpressurewasmonitored usingatemporary gageonthenitrogenmanifoldandonLR/PR-1R623Ainthecontrolroom.Whiletryingtoobtain80/pumpspeedtoperformaRPTtrip,cavitation wasdetectedatthevesselheadwith"A"pumpat74Xand"B"pumpat70/speed.Pumpspeedswerereducedto65Xtostopjetpumpcavitation.

Itwasnotedatthistimethat"B"loopdriveflowindications werereadingzeroandjetpump$/10readlow.Theyreadzeroforabout20min'-utes.Thisisbelievedtobefromthetemporary manwayaccesscoverslidingover,the"B"recirculation suctionlineelbowtaps.AnRPTtripofbothre-circulation pumpswasperformed at50/speed.ReactorPressurewasincreased to150psiusingNsupply.Recirculation pumpswerestartedandincreased to50/speed.Asetofdatawastakenforjetpumpsandrecirculation pumpsdriveflow.Thisdatarevealeda20/flowreduc-tionofthe"B"recirculation loopdriveflowsandjetpumpflowsascomparedtopreviousdata.Jetpumpf/10stillreadlowalso.Atthistimeaslightnoisecouldbeheardnearthe"B"recirculation pumpsuctionvalve.Previously noab-normalnoiseswereheard.Thecauseoftheflowreduction couldnotbedetermined withthevesselfilled.IntheinterestoftimeitwasdecidedtoperformtheReactorPressureVesselHydro.Aftersuccessfully completing thevesselhydro,,the reactorvesselwasdrainedtodetermine thecauseofthe"B"loopblockage.

WhileremovingtheRPVhead,four"0"ringretaining clipsfellintothevessel.Usingafibro-scopelookingthroughthe"B"suctionlinedecontamination fittingitwasdis-coveredthatasteelplatewaswedgedonthevesselsi'deofthesuctionvalve.Furtherinvestigation identified theplateasthe"B"suctionsidemanwayaccesscover.Plansweremadeforretrieving themanwaycoverandattaching hardwareandareportwasmadeonthedamagetotheReactorVesselandrecirculation suctionpipe.Themanwaycoverandallattaching hardwarewereretrieved fromthevessel.Threeofthefour"0"ringretaining clipswerefound.ThedamagecausedtotheRPVvesselandsuctionpipewasdocumented anddispositioned pertheNon-Confor-manceReportsincludedinthisreport(Attachment 2).,IPage3of6

~~~[0 Following theremovalofallforeignpartsfromthevessel,areinspection toestablish thecondition ofvesselcomponents wasperformed.

Theinspection teamconsisted ofthreeengineers, oneofwhichwasperforming thefunctionofQC.Thisreinspection reverified applicable inspection pointsofthePre-flowInspection.

Acopyofthescopeandresultsoftheinspection isincludedasatestaddendumoftheattachedprocedure.

Scratches, gouges,ducttape,andpiecesofthemanwayaccesscoverrubbergasketmaterialwerefoundthroughout theRPVandintherecirculation piping.Onecrackedtackweldononeofthecoresprayspargernozzleswasfound.Adentononeofthecontrolrodsandtwodislodges

-peripheral fuelsupportswerefound.Thelocationofalldefectslistedareincludedintheremarksheets(Appendix J)inthereinspection sectionoftheattachedprocedure.

Thecrackedtackweldwasrepairedandthefuelsupportswerereplacedandareinspection ofthoseitemswasmade.Aftercompletion ofthereinspection,

.theshroudheadwasinstalled andten-sioned,thevesselheadwassetandthevesselwasfilledtotwofeetbelowtheflangeinpreparation ofcontinuing ReactorRecirculation Flowtesting.TheRecirculation Flowtestingwascompleted withnofurtherproblems.

ReactorRecirculation pumpswereoperatedtoprovidegustunder50%core(flowtoallowheat-upto135Finordertoachievethermaltightening oftheshroudheadbolts.Thismethodprovidedaheat-uprateof1F/hr.Vessellevelcontrolwasaccomplished usingfeedwater injection andreactorwater-cleanup systemsandmainsteamlinedrainstorejectwater.Temporary hosebypassedtheRWCU.regenerative heatexchangers tominimizetheheatloss.Reactorvessellevelwasmonitored usingthewiderangereactorlevelindicator LI-1R605usingatemporary reference legconnected totheheadventmanifold.

Reactortemper-aturewasmonitored usingthereactorrecirculation loopsuctiontemperatures recorder.

Thevesselwaspressurized usinginstrument airto100psi'andthenwithN2to150psithroughthetemporary headventmanifoldsupplyline.Vesselpressurewasmaintained above150psithroughout theflowtest.When135Fwasreached,recirculation pumpspeedswereincreased to50%,65%,andmaximumspeed(78%toaccomodate 100%coreflow).AsetofdatawastakenateachoftheabovespeedsandrecordedinAppendixE,F,6Goftheattachedtestprocedure.

Thedualpump100%coreflow35hourrunwasstartedwithcoreflowmain-tainedatthevalueslistedinAppendixHoftheattachedtestprocedure.

Thecoolingflowestablished bythefeedandbleedoffeedwater andRWCU/Main Steamsystemswassufficient tominimizetheheatupratetokeepvesseltemperature below230Fforthedurationofthe35hourrun(37hoursactual).Bothrecirc-ulationpumpswereoperatedindividually forthe14hourruns(16hoursactual)atthesamepumpdriveflowestablished duringthedualpumprun.Page4of6 VI.Post-InsectionFollowing completion oftheflowtesting,thereactorvesselwascooleddownanddepressurized.

TheRPVheadwasremovedandthevesselwasdrainedandthepost-inspection wasconducted byI&SEandaninspection teamconsisting oftwoengineers, oneQCInspector, andaphotographer withthefollowing results:1.25%oftheincoreguidetubestabilizer bracketshadrustypatchesonthemeventhoughtheyweremadeofstainless steel.2.A5"longweldingrodwasfoundontheshroudheadsupport.belowjetpumps//13and814.3.Thelowerriserbraceweldontheshroudsideofjetpumpf/5"and86risershowedevidenceoflackoffusion.4.Therewereseveralmarksontheshroudledgeneartheseismicpins.Theyappearedtobeinstallation marks.5.Steamseparator standpipe(Serial8A460)toshroudheadweldhas"Sugaredburnthrough".

6.Anothercrackedtackweldwasfoundonacorespraynozzle.Twoothershadgranulartackweldsandonenozzleonlyhadonetackweld.7.Thecorespraypipingabovejetpump820hadasurfacedefect(inden-tation)<"X3/4"X1/16"deep.8.About50%ofthetopguideboltkeepersandwedgeswereloose(i.e.,theycouldbemovedwithyourhands).9.Severalpeicesofgasketmaterialandducttapewerefoundinvariouscorelocations.

SeethePost-Inspection AppendixJ's.10.Theperipheral singlefuelsupportcastingatlocation'53-12hada4"squareby1/16"deepsurfacedefectinit.ll.Themissing"0"ringretaining clipwasfoundonthejetpumpannulusbetweenjetpumpf/'s15and16.Thesediscrepancieswere documented inPP&LNon-Conformance Reports(NCRs).Thefollowing listsummarizes theseNCRs:1.PP&LNCRf/80-251:

RPVheadandmissingclips2.PP&LNCR880-260:Missingcomponents oftemporary cover3.PP&LNCR$180'-'261; 4.PP&LNCR//80-263:

5.PP&LNCR880-320:Missinggasketmaterial"B"recircloopsurfacediscontinuities 1.Gougein"B"loopbetweenvalve&elbow2.Gouges(2)in"B"loopbase3.ArcstrikeonbottomofshroudbyjetpumpIllPage5of6

4.Surfacemarksoncladdingaround"B"recircpumpsuctionnozzle5.Graystickymaterialbyjetpump810onoutsideofshioud6.Scratches ontheoutsidebyjetpumpI!106.PP6LNCRII80-324:

l.2.3.4.5.6.7.PP6LNCR/I80-337:

1.Gasketmaterialinsteamseparator Jetpumpriserbraceweld"lackoffusion"Corespraypipingandnozzlediscrepancies Topguideboltkeepersandwedgeslooseencoreguidetubestabilizer bracketshadpatchesofrustSinglefuelsupportcastingsurfacedefectCoresprayspargernozzletackweldsAttachment 2containscopiesoftheseNCRs.Page6of6

~~

~PRLFORld25~P~I~~cc:H.W.KeiserJ.J.GrahamE.FigardD.J.ThompsonDCCOctober2,1980SUSQUEHANNA STEAMELECTRICSTATIONTESTREVIEWBOARDMEETINGMINUTESMEETINGNO.80-22ER100450FILE813-14~EIlSG5UPV15GCOORCLNhTOR GRPSUPVKihgldlNhSSTGEO"PihCR,Date:September 25,1980,,8:50amAttendees:

Listattached(Attachment A)~Aenda~~ygcP-RESPfORROSIER~PII!P~SUSPENSETheTRBconvenedtoreviewandrecommend forarod262ev.,ReactorPressureVesselcaonITheattached(Attachment B)ddaendum,withmodesselInternals Vibration Trecommendations incorpdesorporatewasification basedonTRBrecommended forapproval.

TheTRBdirectedthattheTRBIcurrentlyusedforthoseTechnical eISGrepresentative reve.ewtheapprovalcycletotheseprocedures, foradequacyreardinecncalProcedures reviewedbtyheTRB,andchangescyregaringthedocumentation ofsuchreviewsD.X~l-.-glompson/JJG/pabattachments

~pcs><~~(gyp$980<s@VLNNbILYALYANIAVVWLK5aLIVPIICOMVANT TR8AT)8o-az-z.p-8o6JZAhAm~<C<t7irq

~.)FeraAD7A-I(Rcv.0)SPECIFICTECHNICAL PROCEDURE MODIFICATION ADDEiIDUN'II.SUSQUEHANNA SESUNITNo3.PROCEDURE NAMEg&rfngPPFSZ~A'8' FSreC>~7MrrrIcS'iBP47rr~

~MT'HEET~OF4.PROCEDURE NUMBERNP4.r4>Eu~5.MODIFICAIONDESCRIPTION/REASON 8vpr~jper~wan'c'c-

~C"SOFA7.8.l.4+~Hr4,FfjgpgpagCute7'<A'+pS'y4~g-vpg~cye4,y~sFcter/7&AgFbvc7rva'w ggj-"g'eerweuew S~+yawswhs.o1sc-PN4, gg+/,g,gpcrgQ'j$7yp7+t.-ppcrgcuc47r&

++P>4kBy/SPA1/AV8$7PHAsWPffCAirbpFNgpg@pepcurgedprew7o8F7b44friyP'C=

ClrcuPFAcFrcW..bVar+y'lV PaPdPe+oeACr~WAS1//A1AuR//'.ZINg.

REMA///PRg

~ggfABYSS/Alp.

du//+piwi1~c~~SCeaypPtffFc9lFcrZO4WI~/

4+pSre7'~Ap&J'+4u1'F>A'fA'r+4.flpA'~>TWp rt+ASWcf7$$7'p+g+/jp/p'cc$

$gCc/kgbADAfbrN14<rrrce7'ygyp'vc.7'~vgayp~u-.rCod38.

7h'F~R&'4SArrlcN0r~pC,~&4~~4)7/f~pF5'vcJS'p5gec7r WgIgC8gp<erc~F8yP'ggrprier/rye N/OrFS.7h'~A/lI'&lenpPic:gr~Sg8cgrcarS7cc'w8'WRRAnoSePA'7S'~8.

Pt.a~07rHPIC7-rca~~~A~rkP,~SFRF~r&d~A'nW,P~vrsvgcc,fd<&~r~c=.

~~Kr~pCwrv&.SvPAccoPc=Re'samep-ratePPw>xwc=ssFceotal-pi~grPt.=~MF4.CnAuAW~cF-ag~gc.y-~~~~+~CdRDEWE'IR.+A~~Wrrc/n'S.bCVZcd+Pc07~+rPegg7'/40'suc-ps wjcc,4$++4ppA4~~~p~gtyrMW&4$'WAdgPA'du&Fc'P.J'&A'FV'P4~~'IPJicejr~q

+rrH~mrs'p-rr..SYSTEMSTARTUPENGL4EERDATE FosEEEAD7A-I=(Rcv.0)SPECIFICTECHNICAL.

PROCEDURE ivkODIFICATION ADDENDUMSUSQUEHANNA SESUNITN~SHEET~OF---<eS..-re'&a>e3.PROCEDURE SSIAFKVZrre~~~7.cv7r4.PROCEDURE NUMBERPZrdS.MODIFICA~N DESCRIPTION/REASON (I).A)Pcg.r~g,'g-E~cecp>>~/I(z).u.r~.gccsr-gLoop'+c7.

Pv~P2~PcOcr.fr~/PEEIetc'gio>~p~4>>'P'0IAIC>>ipvg,-JiIACR.gjoFpgay(j(~o)p4-osjg"r'c,rg1Peel(/>l~g.jo~~~'P"gFAPvc'crag(F2/~e+P>>pA~eIHl>>~C~)'""'rs..P>>/'>~/LLer-C<).~~/+~<M~HdZ'pp,nshado~~Coo~,~)~eW&eAScagJ/a,Mg(i)g'.....~'P'"P.pCMEe~())~w4o'cSu/Fat'ez OFPZc.-cFgcpv~P~~<++<~<>jpurtaciesJsRw+~c8~+~.'<I"<u~eeJcpce~pej'PP>>serp-p~a~p~(r'3/iNucAgO/J(ir)r7ucs/'.AZ]C'v~p.g~~g~~~i~)"P-ZP'-7a,DATE/eSTART41'NGINEER

.FotiEEAD7.4-l(Rcvi0)SPECIFICTECHiPICAL PROCEDURE ivIODIFICATION ADDENDU~II SUSQI.'EHANNA SES-UNITNo3.PROCEDt'REiNAMEC8C'c5.MODIFICAQIOiN DESCRIPTION/REASON 2-SHEET+OE----4.'ROCIPEiEU81BERwse.vII'Is,g,.do4Td',WCJ~eZ44a,~~~3CI-e~rh(Iva-ct.)O~~p(/s)5>r~rh',hhep<rat~rz

(~)F<JSJhht'er 5p~JueEh-.SZ-~@PeC>>)e~sp:r~(~~)lEaczriJ.rg'rue4Laaec;

)~C.reQal-c<p&ySpall<rx4+'8Jc't-g8w~aLcryFce4O'erg'c~g~p/p'-e~(~>)a-6~8~~~<PAeEW(zo)u~Cr,PA<rrg

~upL<(z~)'a"bed~ew~+.gC~rge~slllc Ar-w~Ca~g~~gSTEMSTARTUPE.iCINEERDATE

~~v'>.s'~APPENDIXJTP2.16-Rev.

2R:-V'TKRÃALS O'SPiCTIO'5 S~NOTEKXE'k)DITIO'.U WS:-=C~ONSurETSASNE:-DH).ANDATACK~TOTHIS'ROCEDURE

'CheckOne:.Pre-Q.c~Inspection Post-fZovInspection (Section7.l)(Section7.3)Photographs Taken"TesaalNunber1akenAreaInspectec:.

TP2'16ProcenreS'ectionStepNumber:Observations:

~IW*Verifiedby:Verifiedby:AppendsJ88