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| | issue date = 11/27/1996 | | | issue date = 11/27/1996 |
| | title = Part 21 Rept Re 2-1878 Globe Piston Check Valves.A/Dv Plans to Include Philosophy of Both Enhancement W/Smaller Piston Check Valves.A/Dv Evaluated Found Condition of Piston Check Valve,Stuck Open | | | title = Part 21 Rept Re 2-1878 Globe Piston Check Valves.A/Dv Plans to Include Philosophy of Both Enhancement W/Smaller Piston Check Valves.A/Dv Evaluated Found Condition of Piston Check Valve,Stuck Open |
| | author name = KNECHT W G | | | author name = Knecht W |
| | author affiliation = ANCHOR/DARLING VALVE CO. | | | author affiliation = ANCHOR/DARLING VALVE CO. |
| | addressee name = CARTER J | | | addressee name = Carter J |
| | addressee affiliation = NRC | | | addressee affiliation = NRC |
| | docket = 05000335, 05000389 | | | docket = 05000335, 05000389 |
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| =Text= | | =Text= |
| {{#Wiki_filter:g1ACCESSIONNBR:SCIL:50-33550-389AUTH.NAMEKNECHTFW.G.RECIP.NAMECARTER,J.CATEGORYj.REGULATINFORMATIONDISTRIBUTIONSTEM(RIDE)9612160224DOC.DATE:96/11/27NOTARIZED:NOSt.LuciePlant,Unit1,FloridaPower6LightCo.St.LuciePlant,Unit2,FloridaPower6LightCo.AUTHORAFFILIATIONAnchor/DarlingValveCo.RECIPIENTAFFILIATIONNRC-NoDetailedAffiliationGivenDOCKET'00500033505000389 | | {{#Wiki_filter:CATEGORY j. |
| | REGULAT INFORMATION DISTRIBUTIONSTEM (RIDE) g1 ACCESSION NBR: 9612160224 DOC.DATE: 96/11/27 NOTARIZED: NO DOCKET '0 SCIL:50-335 St. Lucie Plant, Unit 1, Florida Power 6 Light Co. 05000335 50-389 St. Lucie Plant, Unit 2, Florida Power 6 Light Co. 05000389 AUTH. NAME AUTHOR AFFILIATION KNECHTFW.G. Anchor/Darling Valve Co. |
| | RECIP.NAME RECIPIENT AFFILIATION CARTER,J. NRC No Detailed Affiliation Given |
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| ==SUBJECT:== | | ==SUBJECT:== |
| Part21reptre2"-1878globepistoncheckvalves.A/DVplanstoincludephilosophyofbothenhancementw/smallerpistoncheckvalves.A/DVevaluatedfoundconditionofpistoncheckvalve,stuckopen.DISTRIBUTIONCODE:IE19TCOPIESRECEIVED:LTRENCLSIZE:TITLE:Part21Rept(50DKT)NOTES:RECIPIENTIDCODE/NAMEPD2-3PDINTERN.ILCENTER0NRR/DRPM/PECBRES/DET/EIBRGN2RGN4EXTERNAL:INPORECORDCTRNRCPDRCOPIESLTTRENCL1111111111111111RECIPIENT1DCODE/NAMEWIENS,L.NRR/DISP/PSXB/BPDRWARD,M.RGNlRGN3NOACSILVERFENUDOCSFULLTXTCOPIESLTTRENCL1111111111111'1DUEOCULPg~~SCAggpoNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMOWFN5D-5(EXT.415-2083)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!FULLTEXTCONVERSIONREQUXREDTOTALNUMBEROFCOPIESREQUIRED:LTTR15ENCL15 Anchor/DarlingValveCompany~Williamsport,PA17701W.G.KNECHTTechnicalDirectorNovember27,1996Mr.JerryCarterUSNRCEventsAssessmentBranchWashingtonDC20555
| | Part 21 rept re 2"-1878 globe piston check valves.A/DV plans to include philosophy of both enhancement w/smaller piston check valves.A/DV evaluated found condition of piston check valve, stuck open. |
| | DISTRIBUTION CODE: IE19T COPIES RECEIVED:LTR ENCL SIZE: |
| | TITLE: Part 21 Rept (50 DKT) |
| | NOTES: |
| | RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL 1D CODE/NAME LTTR ENCL PD2-3 PD 1 1 WIENS,L. 1 1 INTERN . IL CENTER 0 1 1 NRR/DISP/PSXB/B 1 1 NRR/DRPM/PECB 1 1 PDR WARD, M. 1 1 RES/DET/EIB 1 1 RGNl 1 1 RGN2 1 1 RGN3 1 1 RGN4 1 1 EXTERNAL: INPO RECORD CTR 1 1 NOAC SILVERFE 1 1 NRC PDR 1 1 NUDOCS FULL TXT 1' 1 D |
| | U E |
| | OCUL Pg |
| | ~~ SCAggpo NOTE TO ALL "RIDS" RECIPIENTS: |
| | PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM OWFN 5D-5(EXT. 415-2083) TO ELIMINATE YOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED! |
| | FULL TEXT CONVERSION REQUXRED TOTAL NUMBER OF COPIES REQUIRED: LTTR 15 ENCL 15 |
| | |
| | Anchor/Darling Valve Company ~ Williamsport, PA 17701 W. G. KNECHT Technical Director November 27, 1996 Mr. Jerry Carter US NRC Events Assessment Branch Washington DC 20555 |
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| ==Subject:== | | ==Subject:== |
| A/DVl878ClassPistonCheckValves | | A/DV l878 Class Piston Check Valves |
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| ==DearMr.Carter:== | | ==Dear Mr. Carter:== |
| PerourdiscussionthisdatetheenclosureisthelatestcopyofourreporttoFPSLregardingthepistoncheckvalveproblem.ShouldyouhaveanyquestionspleasedonothesitatetocallFloydBensinger,ourEngineeringManager,orthewriter.Sincerely,ANCHOR/DARLINGVALVECOMPMYu,rlW4f-WilliamG.KnechtTechnicalDirectorWGKjscc:F.A.BensingerEnclosure96i2i6022496ii27~iPDRADOCK050003358PDR Anchor/DarlingValveCompany701FIRSTSTREETP.O.SOX3428WILUAMSPORT,PA177014428(717)3274800FAX:(71TJ3274805Page1of4FloridaPowerandLightCompanySt.LuciePlantP.O.Box128FortPierce,FL24954November20,1996Attention:D.J.DenverSt.LucieEngineeringManager
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| | Per our discussion this date the enclosure is the latest copy of our report to FPSL regarding the piston check valve problem. |
| | Should you have any questions please do not hesitate to call Floyd Bensinger, our Engineering Manager, or the writer. |
| | Sincerely, ANCHOR/DARLING VALVE COMPMY u,rlW4f-William G. Knecht Technical Director WGKjs cc: F. A. Bensinger Enclosure 96i2i60224 96ii27~i PDR ADOCK 05000335 8 PDR |
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| | Anchor/Darling Valve Company Page 1 of 4 701 FIRST STREET P.O. SOX 3428 WILUAMSPORT, PA 177014428 (717) 3274800 FAX: (71 TJ 3274805 Florida Power and Light Company St. Lucie Plant P.O. Box 128 Fort Pierce, FL 24954 November 20, 1996 Attention: D.J. Denver St. Lucie Engineering Manager |
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| ==Subject:== | | ==Subject:== |
| | A/DV 2"-1 8780 Piston Check Valves |
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| ==Reference:== | | ==Reference:== |
| A/DV2"-18780PistonCheckValves1.FP&LJPN-SPSL-96-0372,August16,1996Letter2.NDVS.O.'sET401andRZ8143.NDVTestReportNo.'sRZ814,TestReportofFlowTestona2"-18780GlobePistonCheckValve,October2,1996Gentlemen:NDVapologizesforthedelayinrespondingtothereferencedFP&Lletter.Wehadhopedtoreceiveapplicationresponsestoournotificationlettersbutasofthiswritingwehavenotreceivedanycompleteinformation.NDVhasperformedadesignreviewofthepistoncheckvalvewiththeintenttoaddressthefunctionalandre-assemblyproblemsexperiencedatSt.Lucie.Thefollowingareaswereaddressedasnoted:
| | : 1. FP&L JPN-SPSL-96-0372, August 16, 1996 Letter |
| A.PrreeI/BonnAreImBonnetRetainerCapscrewsFP8LreportedhavingdifficultyinsealingtheADVansealusingthecapscrewwithoutpressure.Thecurrentcapscrewisa5/16"diametercapscrew.A1/2"diametercapscrewwillbeusedinthefuture.Thiswillprovideapproximatelythree(3)timesthegasketload.2.GallingoftheBonnetRetainerThreadsFPBLhasexperiencedgallingofthebonnetretainerthreads.The.currentretainerismadeof316stainlesssteelwithchromeplated12seriesthreads.NDVisevaluatingreplacingthisdesignwitha17-4PHbonnetretainer(nochromeplating)with8seriesthreads.Assumingsuccessfulcompletionofthenewbonnetretainerevaluation,thisdesignwillbeputinplace.A/DVplanstoincludethephilosophyofbothenhancementwiththesmallerpistoncheckvalves.Thesetwo(2)enhancementswillaffectinventoryandpartinterchangeability.B.CIninDinfVlvsPriorhimenNDVhasevaluatedseveralmethodstoassurecompletedryingofthepistoncheckvalvespriortoshipment,i.e.disassembly,baking,etc.Wehaveconcludedthatthemosteffectivemethodistodisassemblethevalvesafterhydrostatictesting,drythepartsandreassemblewithoutthegasketandanti-rotationpin(PartNo.258)installed.Thegasketandanti-rotationpinwillbepackagedwiththevalveandatagplacedonthevalverequiringinstallationofthesetwo(2)partsaftervalveinstallation.VIvPerfrmnceFnionalImDiscGuideAreaofBodyNeckBoreWeevaluatedthisareatodetermineifthebodyguidescouldbeimproved.Severalmethodswereevaluated,i.e.,steevingthebodyborewithhardenedmaterial,reshapingtheexhaustport,etc.Allmethodsarecostly.Theconclusionwasreachedthattheabovechangeswerecostprohibitiveandthebetterresolutionistouseasmallervalveforoscillatingflowapplicationinordertoplacethediscinamoreopenpositionwhereitisbetterguidedbythebody. | | : 2. NDV S.O.'s ET401 and RZ814 |
| C.ValvePertrmanOFuncIonIItems(Conttnued)2.Disc-BodyMaterialCouplettwasstatedbyFP8Lthatfrettingismoreapttooccurwherealargedifferenceinmaterialhardnessexists.A/DVselectedthebody-discmaterialcoupleforwearresistance,gallingresistanceandcastability,weldabilityofthebodies.Amoreimportantfactortoreducethepotentialforfrettingisreducedstresslevels.NDVdoesnotplantochangethebodyordiscmaterials.AsdiscussedinA.1.aboveandinthelaterrootcauseanalysis,useofasmallervalvewouldresolvethissituation.RoughMachiningleftintheBodyNeckBoreInMay,1993,NDVhadchangeditsroughmachiningprocesstosetupandroughcuttheneckboreandseatpocketusingthesamesetupmethodandsinglepointtooling-boringasthefinishmachiningprocess.Priortothistimetheneckborewasroughmachinedonaradialdrill.Thisdrillingprocesswasnotalwaysperformedonthesamecenterlineasthefinalmachiningandthedrillhadatendencytotailoffcenter.ThisareahasbeenresolvedasdescribedaboveinMay,1993.RatioGuideLength-DiscDiameterNDV'sdesigncriterialimitsthepotentialdisctilttolessthan1/2'ndrequiresaratioofone(1)orgreaterforthedisc,guidelengthtodiameter.The2"-1878¹PistonCheckdischasaratioof1.12:1.BothNDV'sdesigncriteriaandthe2"-1878¹designarerepresentativeofNDVandcompetitivevalvedesignswhichhavebeenproventobesuccessfulinmostservices.RooCsNDVevaluatedtheasfoundconditionofthepistoncheckvalvethatstuckopen.Toassistinourrootcauseanalysis,weperformedflowtestsontwo(2)2"-1878¹PistonCheckvalves(one(1)valvereturnedfromFP&L,S/NET401-9-6).ReferenceNo.3Report,enclosed,documentsthetaskandresults.Thetestingwasperformedtoevaluatevalveperformanceatvariousforwardflowrates.Thetestconclusionwasthevalvealwaysclosedwhenforwardflowended. | | : 3. NDV Test Report No.'s RZ814, Test Report of Flow Test on a 2"-18780 Globe Piston Check Valve, October 2, 1996 Gentlemen: |
| EgAsaresultofourevaluationoftheFPBLfailedvalveandourtesting,wehaveconcludedthattherootcauseisthediscoscillation,causedbythereciprocatingpump,causingfrettingtotakeplaceinthevalvebodydiscguidearea.Thefrettingareaprovidesaconfigurationinthebodyguidethatallowsthedisctostickopenwithoutforwardflowandwithreverseflow.A/DV'srecommendationstoeliminatethevalveoperationalproblemare(preferredlistedfirst):A.Useofin-linecheckvalvesinreciprocatingpumpapplications.Thisvalvedesignprovidesbetterwearresistantmaterialsasdiscguidesthroughouttheentirevalvestroke.~~Useofsmallerpistoncheckvalve(valvesizeorreducedport)inreciprocatingpumpapplicationstomorefullyopenthediscwherebetterbody-discguidingisavailable.AttachedaregraphsofflowrateversusdiscpositionandCvversusdiscpositiontobeusedtoevaluateT-patternpistoncheckvalvesizeselection.WhereasmallerT-patternpistoncheckvalve~producestoohighapressuredrop,useofaY-patternpistoncheckvalvemayresolvethisconcern.T-patternandY-patternpistoncheckvalvesandin-linecheckvalvesarewithinA/DY'sproductlines.AvailabilityofY-patternpistoncheckvalvesissclleduledforthesecondquarterof1997.lffurtherdiscussionisrequiredontheabove,pleasefeelfreetocontactus.ANCHOR/DARLINGVALVECOMPANYFloydA.Bensinger,P.E.Manager-Engineeringbcc:J.ChappellT.JohnsonW.Knecht'G;KneiserR.MaiettaG.ParksJ.TarbuttonH.WescottF.Velez 502"8cSmallerT-PistonCheckValvesFlowCoefficient(Cv)vs.DiscPosition~~FAB01-Nov-9640CEJ030201000%20%40%60%80%100%1/2"PCsO1-1/2"PCsDisc%Open+3/4"Bc1"PCs2"PCs 3502"8cSmaIIetT-PistonCheckVaIvesAirFlowRote(cfm)vs.DiscPosition~~FAB01-Nov-963002502001501005000%20%40%60%80%100%1/2",3/4"8c1"P.CsDisc%Open+1-1/2"PCs<>2"PCs 2602"BcSmallerT-PistonCheckValvesWaterFlowRote(gpm)vs.DiscPosition~~FAB01-Nov-96240220200180160140120.100.8060402000%20%40%60%80%100%1/2",3/4"Bc1"PCsDisc%Open+1-1/2"PCs<>2"PCs PARTCTYNO001IBOOTDESCRIPTION002I004I015IBONNETDISCSEATRINC050IPRESSURESEALCASKET052ISPACERRING054IBOMNETRETAINERSASSI~5MSA47~16SA65IP560TYPEIA276.S21600AGRAPHITEA47~16SA479-516MATERIALREVISIONSDELETEDMOTE5:OYSN,ADDEDMofdseTHRUlo.CUSTOMERNOTEADOEOUNITSAANOVALVEDATASHEETNO.DELETEDCUST.P.o.No.dcMOVEDA/OVS.o.No.TALEBLOCK:DELETED"CLOSEACWIHI2215I256I260I545IBONNETCAPSCREWANTHIOTATIONPINWIRENAMEPLATEA574AISI502(SPRINCTTPEER516AISI504545IIDENTIFICATIONPLATEAISI504429ISPRINGINCONELXI.VALVEISASMECLASSIPER1965ASMKSKCTIOMR2.APPROXVALVEWEIGHT24LBS5.APPROXCV564.PISTONCHECKVALVEDESIGNEDFORMOUMTINCINAHORIZONTALRUNOFPIPEWITHVALVEENDSHORIZONTALANDBONNETONTOP5.VALVEDESICNPRESSUREIS2755PSIAT6doFNOTES7.4-ASMKPRESSUREBOUNDARYPARTd.CRACKIMCPRESSURE5PSI9.ANSI1676STANDARDINTERPOLATEDPRESSURECLASSlo.HYDROSTATICTESTINFORMATION:SHELLSEATPRESSURE(PSI)57754956ALLOWABLKLEAKAGE(CC/HR)03d.MINIMUMFLOWDIAMDER1.500SEATRINGINSIDEDWlETER~1.500DURATION(MIN)10525d~ooo5~FO0)COO!0COCIILOWElO.Vl>COI:IL054215052050002429004001015FLORIDAPOWERRLIGHTCOMPANYST.LUCIEUNITSIR'2SPECIFICATIONNo.:MN5.06VALVEDATASHEKflYDSPSL&IO'Y.~.52MIMFLOWZeo545546df.520MINSECTIONAAET401%ANCHORDARLINGVALVECOMPANY2"-1878FULLPORTSOCKETENDSSTAINLESSSTEELPISTONCHECKVALVENONWOBALTTRIMHIP9AIO00302IT'~l'T~ONBY.'AlQ10I92QI9ll212PS71OAPPO6IIRFBegaIO-IIHI2I2545~76}}
| | NDV apologizes for the delay in responding to the referenced FP&L letter. We had hoped to receive application responses to our notification letters but as of this writing we have not received any complete information. |
| | NDV has performed a design review of the piston check valve with the intent to address the functional and re-assembly problems experienced at St. Lucie. The following areas were addressed as noted: |
| | |
| | A. Pr re e I/Bonn Are I m Bonnet Retainer Capscrews FP8L reported having difficulty in sealing the ADVanseal using the capscrew without pressure. The current capscrew is a 5/16" diameter capscrew. A 1/2" diameter capscrew will be used in the future. This will provide approximately three (3) times the gasket load. |
| | : 2. Galling of the Bonnet Retainer Threads FPBL has experienced galling of the bonnet retainer threads. The current retainer is made of 316 stainless steel with chrome plated 12 series threads. NDV is evaluating replacing this design with a 17-4PH bonnet retainer (no chrome plating) with 8 series threads. |
| | Assuming successful completion of the new bonnet retainer evaluation, this design will be put in place. |
| | A/DV plans to include the philosophy of both enhancement with the smaller piston check valves. These two (2) enhancements will affect inventory and part interchangeability. |
| | B. CI nin D in fV lv s Prior hi men NDV has evaluated several methods to assure complete drying of the piston check valves prior to shipment, i.e. disassembly, baking, etc. We have concluded that the most effective method is to disassemble the valves after hydrostatic testing, dry the parts and reassemble without the gasket and anti-rotation pin (Part No. 258) installed. The gasket and anti-rotation pin will be packaged with the valve and a tag placed on the valve requiring installation of these two (2) parts after valve installation. |
| | V Iv Perf rm nce F n ional I m Disc Guide Area of Body Neck Bore We evaluated this area to determine if the body guides could be improved. Several methods were evaluated, i.e., steeving the body bore with hardened material, reshaping the exhaust port, etc. All methods are costly. The conclusion was reached that the above changes were cost prohibitive and the better resolution is to use a smaller valve for oscillating flow application in order to place the disc in a more open position where it is better guided by the body. |
| | |
| | C. Valve Pert rmanO Func Ion I Items (Conttnued) |
| | : 2. Disc - Body Material Couple tt was stated by FP8L that fretting is more apt to occur where a large difference in material hardness exists. A/DV selected the body-disc material couple for wear resistance, galling resistance and castability, weldability of the bodies. |
| | A more important factor to reduce the potential for fretting is reduced stress levels. NDV does not plan to change the body or disc materials. As discussed in A.1. above and in the later root cause analysis, use of a smaller valve would resolve this situation. |
| | Rough Machining left in the Body Neck Bore In May, 1993, NDV had changed its rough machining process to setup and rough cut the neck bore and seat pocket using the same setup method and single point tooling-boring as the finish machining process. Prior to this time the neck bore was rough machined on a radial drill. This drilling process was not always performed on the same centerline as the final machining and the drill had a tendency to tail off center. This area has been resolved as described above in May, 1993. |
| | Ratio Guide Length - Disc Diameter NDV's design criteria limits the potential disc tilt to less than 1/2'nd requires a ratio of one (1) or greater for the disc, guide length to diameter. |
| | The 2"-1 878¹ Piston Check disc has a ratio of 1.12:1. Both NDV's design criteria and the 2"-1 878¹ design are representative of NDV and competitive valve designs which have been proven to be successful in most services. |
| | Roo C s NDV evaluated the as found condition of the piston check valve that stuck open. |
| | To assist in our root cause analysis, we performed flow tests on two (2) 2"-1878¹ Piston Check valves (one (1) valve returned from FP&L, S/N ET401-9-6). |
| | Reference No. 3 Report, enclosed, documents the task and results. The testing was performed to evaluate valve performance at various forward flow rates. The test conclusion was the valve always closed when forward flow ended. |
| | |
| | Eg As a result of our evaluation of the FPBL failed valve and our testing, we have concluded that the root cause is the disc oscillation, caused by the reciprocating pump, causing fretting to take place in the valve body disc guide area. The fretting area provides a configuration in the body guide that allows the disc to stick open without forward flow and with reverse flow. |
| | A/DV's recommendations to eliminate the valve operational problem are (preferred listed first): |
| | A. Use of in-line check valves in reciprocating pump applications. This valve design provides better wear resistant materials as disc guides throughout the entire valve stroke. |
| | ~~ |
| | Use of smaller piston check valve (valve size or reduced port) in reciprocating pump applications to more fully open the disc where better body-disc guiding is available. Attached are graphs of flow rate versus disc position and Cv versus disc position to be used to evaluate T-pattern piston check valve size selection. Where a smaller T-pattern piston check valve |
| | ~ |
| | produces too high a pressure drop, use of a Y-pattern piston check valve may resolve this concern. |
| | T-pattern and Y-pattern piston check valves and in-line check valves are within A/DY's product lines. Availability of Y-pattern piston check valves is sclleduled for the second quarter of 1997. |
| | lf further discussion is required on the above, please feel free to contact us. |
| | ANCHOR/DARLINGVALVECOMPANY Floyd A. Bensinger, P.E. |
| | Manager - Engineering bcc: J. Chappell G. Parks T. Johnson J. Tarbutton W. Knecht'G; H. Wescott Kneiser F. Velez R. Maietta |
| | |
| | 2" 8c Smaller T Piston Check Valves ~ ~ FAB 01-Nov-96 Flow Coefficient (Cv) vs. Disc Position 50 40 30 C |
| | EJ 0 |
| | 20 10 0 |
| | 0% 20% 40% 60% 80% 100% |
| | Disc % Open 1/2" PCs + 3/4" Bc 1" PCs O 1-1/2" PCs 2" PCs |
| | |
| | 2" 8c SmaIIet T Piston Chec k Va Ives ~ ~ FAB 01-Nov-96 Air Flow Rote (cfm) vs. Disc Position 350 300 250 200 150 100 50 0 |
| | 0% 20% 40% 60% 80% 100% |
| | Disc % Open 1/2", 3/4" 8c 1" P.Cs + 1 1/2" PCs <> 2" PCs |
| | |
| | 2" Bc Smaller T Piston Check Valves ~ ~ FAB 01-Nov-96 Water Flow Rote (gpm) vs. Disc Position 260 240 220 200 180 160 140 120. |
| | 100. |
| | 80 60 40 20 0 |
| | 0% 20% 40% 60% 80% 100% |
| | Disc % Open 1/2", 3/4" Bc 1" PCs + 1-1/2" PCs <> 2" PCs |
| | |
| | PART CTY DESCRIPTION MATERIAL NO REVISIONS 001 I BOOT SASS I~5M DELETED MOTE 5: OY S N, 002 I BONNET SA47~16 ADDED Mofds e THRU lo. |
| | 004 I DISC SA65IP560 TYPE I CUSTOMER NOTEADOEO UNITS ACW A ANO VALVE DATA SHEET NO. |
| | 015 I SEAT RINC A276.S21600A DELETED CUST. P.o. No. dc I HI2 050 I PRESSURE SEAL CASKET GRAPHITE MOVED A/OV S.o. No. TALE 052 I SPACER RING A47~16 BLOCK: DELETED "CLOSE 054 I BOMNET RETAINER SA479-51 6 215 I BONNET CAPSCREW A574 256 I ANTHIOTATION PIN AISI 502 (SPRINC TTPE 260 I WIRE ER516 545 I NAMEPLATE AISI 504 545 I IDENTIFICATION PLATE AISI 504 429 I SPRING INCONEL X NOTES I. VALVE IS ASME CLASS I PER 1965 ASMK SKCTIOM R 7. 4 - ASMK PRESSURE BOUNDARY PART |
| | : 2. APPROX VALVE WEIGHT 24 LBS d. CRACKIMC PRESSURE 5 PSI |
| | : 5. APPROX CV 56 9. ANSI 1676 STANDARD INTERPOLATED PRESSURE CLASS |
| | : 4. PISTON CHECK VALVE DESIGNED FOR MOUMTINC IN A lo. HYDROSTATIC TEST INFORMATION: |
| | HORIZONTAL RUN OF PIPE WITH VALVE ENDS HORIZONTAL SHELL SEAT AND BONNET ON TOP PRESSURE (PSI) 5775 4956 |
| | : 5. VALVE DESICN PRESSURE IS 2755 PSI AT 6do F ALLOWABLK LEAKAGE (CC/HR) 0 3 |
| | : d. MINIMUM FLOW DIAMDER 1.500 DURATION (MIN) 10 5 SEAT RING INSIDE DWlETER ~ 1.500 25d 054 215 CO 052 050 002 |
| | )C CI O IL O! |
| | ~o 0 O oo5 W |
| | ~ FO El 429 0 O. |
| | Vl 004 |
| | >C 001 O |
| | I: |
| | IL 015 FLORIDA POWER R LIGHT COMPANY ST. LUCIE UNITS I R '2 SPECIFICATION No.: MN 5.06 VALVE DATA SHEKfl YDSPSL&IO ' Y. ~ |
| | ANCHOR DARLING VALVE COMPANY 2"-1878 |
| | .52 MIM .520 MIN SECTION AA Zeo FULL PORT 545 SOCKET ENDS STAINLESS STEEL FLOW 546 PISTON CHECK VALVE df NONWOBALT TRIM ON BY.'AlQHI P 9AIO 00302 10 I 92 I T'~l 'T~ |
| | QI 9ll 21 2P S 71 O ET401% APPO 6II RFB ega IO-IIHI2 I 2 5 4 5 ~ 7 6}} |
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Category:DEFICIENCY REPORTS (PER 10CFR50.55E & PART 21)
MONTHYEARML17229A8871998-10-19019 October 1998
Part 21 Rept Re Potential Defect in Swagelok Stainless Steel Front Ferrule,Part Number SS-503-1 Which Was Machined with Improper Length.C/A Includes Insp Equipment That Will 100% Identify Short Length
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Part 21 Rept Re Potential Defect in Swagelok Stainless Steel Front Ferrule,Part Number SS-503-1,which Was Machined with Improper Length.Insp Equipment That Will 100% Identify Short Length
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Part 21 Rept Re Deficiency in CE Current Screening Methodology for Determining Limiting Fuel Assembly for Detailed PWR thermal-hydraulic Sa.Evaluations Were Performed for Affected Plants to Determine Effect of Deficiency
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Part 21 Rept Re Use of Deltstrat Code for RCS Flow Rate Determination.Code Corrects for Temps to Determine Hot Leg Bulk Coolant Temp
LD-97-024, Part 21 Rept Re Error in Energy Redistribution Factor Used in LOCA Analysis for Listed Plants for Which ABB-CE Performed Analysis.Issued Recommendations Info Bulletin 97-0041997-08-14014 August 1997
Part 21 Rept Re Error in Energy Redistribution Factor Used in LOCA Analysis for Listed Plants for Which ABB-CE Performed Analysis.Issued Recommendations Info Bulletin 97-004
ML17229A2631997-03-12012 March 1997
Part 21 Rept Re Followup of 970307 Event Involving Potential Spring Problem in Bettis Actuator.Recommends That Util Include Two Actuator Replacements of Springs as Precautionary Measures in Next Refurbishment Cycle
ML20133E8001997-01-0808 January 1997
Deficiency Rept Re Nonconformance Related to Masterflow 713 Grout,Which Master Builders,Inc Has Supplied as Nuclear SR Product to 18 Npps.Cause Unknown.Requests That Listed Info Be Provided to Gain Insight as to Scope & Possible Cause
ML17229A1631996-11-27027 November 1996
Part 21 Rept Re 2-1878 Globe Piston Check Valves.A/Dv Plans to Include Philosophy of Both Enhancement W/Smaller Piston Check Valves.A/Dv Evaluated Found Condition of Piston Check Valve,Stuck Open
ML18065B0111996-10-18018 October 1996
Part 21 Rept Re Application of Certain Aspects of ABB-CE Safety Analysis Methodology
ML17229A0571996-09-19019 September 1996
Part 21 Rept Re 2 1878 Piston Check Valve That Failed to Close.Caused by Fretting Wear Damage Between Piston (Disc) & Valvo Body Caused by Pressure Pulsations of Reciprocating Pump
ML17229A0101996-07-25025 July 1996
Part 21 Rept Re 2 1878 Stainless Steel,Piston Check Valve Installed in Charging Sys Failed to Close W/Reverse Flow. Performing Evaluation to Determine Cause of Incident.Other Customers Will Be Notified
ML20057G1511993-10-0707 October 1993
Part 21 Rept Re Westronics Model 2100C Series Recorders. Informs That Over Several Tests,Observed That Recorder Would Reset During Peak Acceleration & Door Being Forced Off Recorder.Small Retaining Clips Added to Bottom of Door
ML20126J5961992-12-31031 December 1992
Part 21 Rept Re Potential Loss of RHR Cooling During Nozzle Dam Removal.Nozzle Dams May Create Trapped Air Column Behind Cold Leg Nozzle Dam.Mod to Nozzle Dams Currently Underway. Ltrs to Affected Utils Encl
ML20125C7161992-12-0707 December 1992
Part 21 Rept Re Possibility for Malfunction of Declutching Mechanisms in SMB/SB-000 & SMB/SB/SBD-00 Actuators. Malfunction Only Occurs During Seismic Event.Balanced Levers May Be Purchased from Vendor.List of Affected Utils Encl
ML20127P5861992-11-23023 November 1992
Followup to 921005 Part 21 Rept Re Potential Defect in SB/SBD-1 Housing Cover Screws.Procedure Re Replacement of SBD-1 Spring Cover Bolts Encl.All Fasteners Should Be Loosened & Removed.List of Affected Utils Encl
ML20118B4391992-09-11011 September 1992
Part 21 Rept Re Degradation in Abb Type 27N Undervoltage Relays Used in Electrical Switchgear.Recommends That Users Review Applications Requiring Exposures Greater than 1E03 Rads TID W/Time Delay Function Option
ML17227A4351992-05-28028 May 1992
Part 21 Rept Re Deficient Matl Supplied by Tioga Pipe Supply.Root Cause Investigation Results Provided.Matl Tested Met Spec Requirements.Tests Revealed That Only 3 Inch 3000# SB564 N04400 Tees W/Heat Code Ma Were Defective
ML17227A4071992-04-28028 April 1992
Part 21 Rept Re crack-like Indications Found in Monel 400 Socket Weld Tee Fittings Supplied by Tioga Pipe & Supply Co.Fabrication Suspended & Metallurgical Exams Conducted. Util Procurement Process Modified
ML17227A4161992-04-0101 April 1992
Part 21 Rept Re crack-like Indications Found in Three Inch Monel 400 Tee Fitting Supplied by Tioga Pipe Supply Co,Inc. Fabrication Suspended & Metallurgical Exams Conducted.Six Addl Tees Returned to Matl Supplier.Actions Completed
L-91-002, Supplemental Part 21 Rept Re GE Reactor Trip Breakers Used in safety-grade Equipment.Initially Reported on 901228.List of Plants Supplied w/C-E Breakers Encl1991-01-0404 January 1991
Supplemental Part 21 Rept Re GE Reactor Trip Breakers Used in safety-grade Equipment.Initially Reported on 901228.List of Plants Supplied w/C-E Breakers Encl
ML17348A1621990-03-27027 March 1990
Part 21 Rept Re Matls W/Programmatic Defects Supplied by Dubose Steel,Inc.Customers,Purchase Order,Items & Affected Heat Numbers Listed
ML17223A5941990-03-0909 March 1990
Errata to 900126 Part 21 Rept Re Anchor/Darling Actuators Incorporating Use of Teldyne-Republic four-way Valves.Lists Plants Inadvertently Left Out in Original Rept
ML19351A2941989-10-0909 October 1989
Part 21 Rept Re Potential of Ambient Compensated Molded Case Circuit Breakers to Deviate from Published Info. Instantaneous Trip Check Will Be Instituted on All Class 1E Thermal/Magnetic Ambient Breakers Prior to Shipment
ML17223A1991989-06-0808 June 1989
Part 21 Rept Re Radiator Fan Shaft Bearing Failure at Plant. Problem Currently Under Investigation.Addl Info Will Be Provided When Available
ML17222A7861989-04-17017 April 1989
Part 21 Rept Re Transformers & Sensors Encapsulated in Epoxy Found to Be Softening or Reverting Back to Liquid.Initially Discovered in Aug 1988 at Plant.Items Encapsulated W/Epoxy Should Be Inspected at Approx 18-month Intervals
ML20247P7991989-04-0404 April 1989
Part 21 Rept Re Atmospheric Dump Valves.Cause of Failure Speculative But Result of Piston Ring That Failed to Seal. Resolution to Problem Requires Increasing Pilot Valve Capacity & Reworking of Plug to Enlarge Pilot Flow Area
ML20211P7211987-02-23023 February 1987
Part 21 Rept Re Rockbestos Coaxial Cable Used in Sorrento Electronics Digital & Analog high-range Radiation Monitor. Insulation Resistance at High Temp Not High Enough for Ion Chamber & Associated Electronics to Operate Properly
ML20215G6801986-10-10010 October 1986
Part 21 Rept Re Vendor Tests of air-operated Diaphragm Valves Revealing Natural Frequencies Less than Required Values of 33 Hz.Initially Reported on 841227.No Adverse Effects Noted During Testing
ML20215G5351986-10-10010 October 1986
Part 21 Rept Re Vendor Tests of air-operated Diaphragm Valves Revealing Natural Frequencies Less than Required Values of 33 Hz.Initially Reported on 841227.No Adverse Effects Noted During Testing
ML20206S0841986-06-30030 June 1986
Part 21 Rept Re Possible Cut Wires in Wire Harness of Bbc Brown Boveri K600/K800 Circuit Breakers.Initially Reported on 860509.Safety Implications Listed.Gear Guard Designed to Prevent Cut Wires
ML20195D2171986-05-27027 May 1986
Rev 1 to Part 21 Rept Re Dowel Displacement on Connecting Rod Bearings Purchased During Nov 1985 - Apr 1986.Initially Reported on 860421.Rod Bearings Will Be Inspected Dimensionally.Further Info Forthcoming
ML20140A5281985-12-19019 December 1985
Part 21 Rept Forwarding Ltr Sent to Customers Re Check Valves Missing Lock Welds on Hinge Supports or Hinge Support Capscrews,Per 851121 Request.List of Customers Receiving Ltr Also Encl
ML20135E2271985-08-23023 August 1985
Part 21 & Deficiency Rept Re Potential Problems W/Natl Valve & Mfg Co Pipe Clamps.Initially Reported on 850613.Ltrs Sent to Purchasers of Pipe Clamps Encl for Perusal
ML20125B1611985-06-0606 June 1985
Supplemental Part 21 Rept Re Addl Circuit Breakers,Furnished as Spares,W/Overcurrent Trip Devices That May Have Short Time Delay Band Lever.Items Require Insp & Replacement If Link Found Incorrect
LD-84-063, Part 21 Rept Re Evaluation & Corrective Action for Excessive Setpoint Drift in Some Potentiometers in Auxiliary Feedwater Actuation Sys Cabinet at St Lucie Unit 2 & Plant Protection Sys Cabinets at Palo Verde1984-10-26026 October 1984
Part 21 Rept Re Evaluation & Corrective Action for Excessive Setpoint Drift in Some Potentiometers in Auxiliary Feedwater Actuation Sys Cabinet at St Lucie Unit 2 & Plant Protection Sys Cabinets at Palo Verde
ML20087J6661984-03-0808 March 1984
Followup Part 21 Rept Re Nuclear Valve/Actuator Stroking Time Possibly Lengthened Beyond 15 When Using hydrocarbon-based Lubricants.Ltrs to Affected Utils Encl
L-83-511, Suppl to Final Deficiency Rept 82-014 Re Malfunctioning Shutdown Cooling Sys HX Bypass Valves.Valves Will Be Replaced W/Conventional Limitorque Operators Prior to Startup from First Refueling1983-10-0606 October 1983
Suppl to Final Deficiency Rept 82-014 Re Malfunctioning Shutdown Cooling Sys HX Bypass Valves.Valves Will Be Replaced W/Conventional Limitorque Operators Prior to Startup from First Refueling
LD-83-050, Part 21 Rept Supplementing 830506 Notification of Potential Significant Safety Hazard Re Matl Defects in Stainless Steel Tubing Pressure Boundary Component.Ultrasonic Exam Shows Assemblies Acceptable Per ASME Code,Section III1983-06-0707 June 1983
Part 21 Rept Supplementing 830506 Notification of Potential Significant Safety Hazard Re Matl Defects in Stainless Steel Tubing Pressure Boundary Component.Ultrasonic Exam Shows Assemblies Acceptable Per ASME Code,Section III
L-83-311, Clarifies 830418 Final Deficiency Rept Re Diesel Generator Start Relay Defect.Addl Indication Provided to Indicate to Control Room When Master Control Switch,Located in Diesel Generator Bldg,Is in Stop Position1983-05-19019 May 1983
Clarifies 830418 Final Deficiency Rept Re Diesel Generator Start Relay Defect.Addl Indication Provided to Indicate to Control Room When Master Control Switch,Located in Diesel Generator Bldg,Is in Stop Position
L-83-282, Final Deficiency Rept Re Premature Indication of Valve Closure of Westinghouse Gate Valves.Initially Reported on 830223.Configuration Represents Normal Design Condition. Condition Not Reportable Per 10CFR50.55(e)1983-05-11011 May 1983
Final Deficiency Rept Re Premature Indication of Valve Closure of Westinghouse Gate Valves.Initially Reported on 830223.Configuration Represents Normal Design Condition. Condition Not Reportable Per 10CFR50.55(e)
ML20072J7041983-05-0909 May 1983
Part 21 Rept Re short-term Reliability Problem W/Position Indicating Mechanism in Solenoid Valve Used to Control PORV 3750010.Magnet Position Indicating Mechanism Replaced on 830507.Corrective Action in Progress
ML20023C6621983-05-0606 May 1983
Deficiency Rept Re Potential Significant Safety Hazard Concerning Defect in Stainless Steel Tubing Pressure Boundary Component.Initially Reported on 830504.Selected Tubes Returned to C-E Tubes for Reinsp
L-83-275, Interim Deficiency Rept Re Failure of Two safety-related Agastat Relays to Time Out Properly & Installation of Incorrect Agastat Relay on Diesel Generator.Initially Reported on 830330.Investigation Ongoing1983-04-29029 April 1983
Interim Deficiency Rept Re Failure of Two safety-related Agastat Relays to Time Out Properly & Installation of Incorrect Agastat Relay on Diesel Generator.Initially Reported on 830330.Investigation Ongoing
L-83-274, Final Deficiency Rept Re Loss of Continuity on Mineral Insulated Cable Assemblies.Initially Reported on 830330. Twenty-three Cable Assemblies W/Defective Connectors Repaired.Deficiencies Not Reportable Per 10CFR50.55(e)1983-04-29029 April 1983
Final Deficiency Rept Re Loss of Continuity on Mineral Insulated Cable Assemblies.Initially Reported on 830330. Twenty-three Cable Assemblies W/Defective Connectors Repaired.Deficiencies Not Reportable Per 10CFR50.55(e)
L-83-260, Interim Deficiency Rept Re Westinghouse Gate Valve Premature Indication of Valve Closure.Initially Reported on 830223.Util Evaluating Condition & Will Submit Final Rept by 8305041983-04-25025 April 1983
Interim Deficiency Rept Re Westinghouse Gate Valve Premature Indication of Valve Closure.Initially Reported on 830223.Util Evaluating Condition & Will Submit Final Rept by 830504
L-83-251, Final Deficiency Rept 83-009 Re Condensate Storage Tank Damage.Initially Reported on 830322.Caused by Condensation of Steam Creating Local Vacuum Conditions.Double Butt Welded Plates Installed,Cracks Sealed & Designs Improved1983-04-21021 April 1983
Final Deficiency Rept 83-009 Re Condensate Storage Tank Damage.Initially Reported on 830322.Caused by Condensation of Steam Creating Local Vacuum Conditions.Double Butt Welded Plates Installed,Cracks Sealed & Designs Improved
L-83-244, Final Deficiency Rept 83-005 Re Diesel Generator Start Relay.Initially Reported on 830318.Safety-related Function of Second Diesel Generator Not Compromised.Item Not Reportable Per 10CFR50.55(e)1983-04-18018 April 1983
Final Deficiency Rept 83-005 Re Diesel Generator Start Relay.Initially Reported on 830318.Safety-related Function of Second Diesel Generator Not Compromised.Item Not Reportable Per 10CFR50.55(e)
L-83-242, Final Deficiency Rept Re Ground Fault in Reactor Protection Sys.Initially Reported on 830310.Condition Not Reportable Under 10CFR50.55(e) & Part 21.No Adverse Effect Would Result If Occurrence Left Uncorrected & Cables Left in Place1983-04-18018 April 1983
Final Deficiency Rept Re Ground Fault in Reactor Protection Sys.Initially Reported on 830310.Condition Not Reportable Under 10CFR50.55(e) & Part 21.No Adverse Effect Would Result If Occurrence Left Uncorrected & Cables Left in Place
ML20069L0771983-04-18018 April 1983
Final Deficiency Rept Re Potential Low Suction Pressure Due to Bam Sys Safety Injection Actuation Signal Pump Start Logic.Initially Reported on 830318.Control Logic Modified
L-83-245, Final Deficiency Rept Re Defective Weld on Safety Injection Test Piping.Initially Reported on 830318.Weld,piping & Fitting Replaced & Hanger Reinstalled1983-04-18018 April 1983
Final Deficiency Rept Re Defective Weld on Safety Injection Test Piping.Initially Reported on 830318.Weld,piping & Fitting Replaced & Hanger Reinstalled
1998-08-13
[Table view]
Category:TEXT-SAFETY REPORT
MONTHYEARML17241A4891999-10-0707 October 1999
LER 99-004-00:on 990912,noted That MSSV Surveillance Was Outside of TS Requirements.Caused by Setpoint Drift.Subject MSSVs Are Being Refurbished & Retested Prior to Unit Startup from SL1-16 Refueling Outage.With 991007 Ltr
ML17241A4951999-09-30030 September 1999
Monthly Operating Repts for Sept 1999 for St Lucie,Units 1 & 2.With 991014 Ltr
ML17241A4741999-08-31031 August 1999
Rev 1 to PCM 99016, St Lucie Unit 1,Cycle 16 Colr.
ML17241A4591999-08-31031 August 1999
Monthly Operating Repts for Aug 1999 for St Lucie,Units 1 & 2.With 990913 Ltr
ML17241A4301999-07-31031 July 1999
Monthly Operating Repts for Jul 1999 for St Lucie Units 1 & 2.With 990805 Ltr
ML17241A4111999-07-16016 July 1999
LER 99-007-00:on 990610,unplanned Cooldown Transient Occurred Due to Personnel Error.Trained & Briefed Personnel & Revised Procedures.With 990716 Ltr
ML17241A4031999-07-0606 July 1999
LER 99-006-00:on 990605,sub-critical Reactor Trip Occurred Due to Inadvertent MSIV Opening.Caused by Personnel Error. Provided Operation Supervision Instruction to Operating Crews,Stand Down Meetings & Operator Aids.With 990706 Ltr
ML17241A4041999-07-0606 July 1999
LER 99-005-00:on 990604,CEA Drop Resulted in Manual Reactor Trip.Caused by Procedural Inadequacies.Procedure Changes Are Planned to Correct Lack of Procedural Guidance for CEA Subgroup Power Switch Replacement.With 990706 Ltr
ML17241A4091999-06-30030 June 1999
Monthly Operating Repts for June 1999 for St Lucie,Units 1 & 2.With 990712 Ltr
ML17241A3941999-06-30030 June 1999
LER 99-004-01:on 990415,as Found Cycle 10 Psv Setpoints Were Outside TS Limits.Caused by Manufacturing Process Defect. All Three Psvs Were Replaced with pre-tested Valves During Cycle 11 Refueling Outage.With 990630 Ltr
ML17355A3681999-06-30030 June 1999
Revised Update to Topical QA Rept, Dtd June 1999
ML17241A3551999-06-0404 June 1999
LER 99-002-00:on 990505,both Trains of Safety Injection Actuation Were Blocked During Surveillance.Caused by Procedure Error.Procedure Revised.With 990604 Ltr
ML17241A3631999-05-31031 May 1999
Monthly Operating Repts for May 1999 for St Lucie Units 1 & 2.With 990610 Ltr
ML17241A3321999-05-17017 May 1999
LER 99-004-00:on 990415,determined That as Found Cycle 10 Psv Setpoints Outside TS Limits.Root Cause Under Investigation.Psvs Replaced with pe-tested Valves During Cycle 11
ML17241A3271999-05-0606 May 1999
LER 99-003-00:on 990406,ECCS Suction Header Leak Resulted in Both ECCS Trains Being Inoperable & Entry Into TS 3.0.3. Caused by Chloride Induced OD Stress Corrosion Cracking of Piping.Made Code Repairs & Coated Piping.With 990506 Ltr
ML17241A3331999-04-30030 April 1999
Monthly Operating Rept for Apr 1999 for St Lucie,Units 1 & 2.With 990517 Ltr
ML17229B0801999-04-0707 April 1999
LER 99-002-00:on 990311,SG ECT Error Caused Operation with Condition Prohibited by Ts.Caused by Deficiencies in Data Analysis Guideline Instructions.Licensee Will Change Data Analysis Guidelines for Lead Analysts.With 990407 Ltr
ML17229B0841999-04-0707 April 1999
Rev 2 to PSL-ENG-SEMS-98-102, Engineering Evaluation of ECCS Suction Lines.
ML17229B0791999-04-0707 April 1999
LER 99-001-00:on 990309,discovered Inadequate Design & IST SRs for Iodine Removal Sys (Irs).Caused by Original Design Inadequacies & Personnel Error.Naoh Tank Vent Valve V07233 Was Tagged Open.With 990407 Ltr
ML17229B0961999-03-31031 March 1999
Monthly Operating Repts for Mar 1999 for St Lucie,Units 1 & 2.With 990408 Ltr
ML17229B0541999-03-10010 March 1999
LER 99-001-00:on 990211,inadequate TS SRs for SIT & SDC Isolation Valves Were Noted.Caused by Failure to Correctly Implement TS Srs.Submitted LAR to Align Required TS SR with Design Bases Requirements Being Verified.With 990310 Ltr
ML17229B0461999-02-28028 February 1999
Monthly Operating Repts for Feb 1999 for St Lucie,Units 1 & 2.With 990310 Ltr
ML17229B0051999-01-31031 January 1999
Monthly Operating Repts for Jan 1999 for St Lucie,Units 1 & 2.With 990211 Ltr
ML17229A9901999-01-20020 January 1999
LER 98-009-00:on 981223,noted That Facility Operated Outside of Design Basis.Caused by non-conservative MSLB Analysis Inputs.Will Review SR Component Differences Between Units & Will re-baseline LTOP Analysis.With 990120 Ltr
ML17229A9961999-01-14014 January 1999
SG Tube Inservice Insp Special Rept.
ML17229A9821999-01-0404 January 1999
LER 98-010-00:on 981207,RCS Boron Sample Frequency Required by Ts,Was Exceeded by Twelve Minutes.Caused by Personnel Error.Equipment Clearance Order Was Lifted to Draw Required Sample & Operations Procedure Was Changed.With 990104 Ltr
ML17229A9831998-12-31031 December 1998
Monthly Operating Repts for Dec 1998 for St Lucie,Units 1 & 2.With 990111 Ltr
ML17229A9611998-12-22022 December 1998
LER 97-002-01:on 981204,containment Sump Debris Screen Was Not IAW Design.Caused by Inadequate C/As for Sump Screen Anamolies.All Identified Sump Screen Deficiencies Were Dispositioned &/Or Repaired.With 981222 Ltr
ML17229A9561998-12-15015 December 1998
LER 98-008-00:on 981118,missed TS SG U Tube Insp.Caused by Encoding Errors While Using Remote Positioning Fixtures.All SG Tube Surveyed.With 981215 Ltr
ML17241A3581998-12-0909 December 1998
Changes,Tests & Experiments Made as Allowed by 10CFR50.59 for Period of 970526-981209.
ML17229A9421998-11-30030 November 1998
Monthly Operating Repts for Nov 1998 for St Lucie,Units 1 & 2.With 981215 Ltr
ML17229A9301998-11-25025 November 1998
LER 98-005-01:on 980807,discovered That New MOV Methodology Caused Past PORV Block Valve Operability Problem.Caused by Inadequacies in Original Vendor MOV Methodology.Planned Valve Mods Will Be Implemented During Cycle 11 1998 Outage
ML17229A9021998-11-0404 November 1998
LER 98-008-00:on 981008,inadequate Reactor Protection Sys Trip Bypass TS Was Noted.Caused by Poorly Worded Ts. Submitted LAR to Clarify Power Requirements for High Rate of Power Trips.With 981104 Ltr
ML17241A4931998-11-0101 November 1998
Statement of Account for Period of 981101-990930 for Suntrust Bank,As Trustee for Florida Municipal Power Agency Nuclear Decommissioning Trust (St Lucie Project).
ML17229A9051998-10-31031 October 1998
Monthly Operating Repts for Oct 1998 for St Lucie,Units 1 & 2.With 981110 Ltr
ML17229A8871998-10-19019 October 1998
Part 21 Rept Re Potential Defect in Swagelok Stainless Steel Front Ferrule,Part Number SS-503-1 Which Was Machined with Improper Length.C/A Includes Insp Equipment That Will 100% Identify Short Length
ML17229A8781998-10-19019 October 1998
Part 21 Rept Re Potential Defect in Swagelok Stainless Steel Front Ferrule,Part Number SS-503-1,which Was Machined with Improper Length.Insp Equipment That Will 100% Identify Short Length
ML17229A8771998-10-14014 October 1998
LER 98-006-00:on 980918,inadvertent Afas Actuation Was Noted.Caused by Degradation of Multiple Afas Power Supplies. Replaced Afas Power Supplies & Revised Procedures.With 981014 Ltr
ML17229A8761998-10-14014 October 1998
LER 98-007-00:on 980918,identified Discrepancies Between Fire Protection Design Requirements & Field Conditions. Caused by Inadequate Translation & Implementation of Fire Protection Requirements.Procedures Revised.With 981014 Ltr
ML17229A8721998-09-30030 September 1998
Monthly Operating Repts for Sept 1998 for St Lucie Units 1 & 2.With 981009 Ltr
ML17229A8511998-09-0202 September 1998
LER 98-005-00:on 980807,discovered That PORV Margins Were Insufficient to Accommodate Addl Conservatism.Caused by Inadequacies in Original Vendor MOV Methodology.Will Implement Planned Valve Actuator mods.W/980902 Ltr
ML17229A8611998-08-31031 August 1998
Monthly Operating Repts for Aug 1998 for St Lucie,Units 1 & 2.With 980911 Ltr
ML18066A2771998-08-13013 August 1998
Part 21 Rept Re Deficiency in CE Current Screening Methodology for Determining Limiting Fuel Assembly for Detailed PWR thermal-hydraulic Sa.Evaluations Were Performed for Affected Plants to Determine Effect of Deficiency
ML17229A8481998-08-0707 August 1998
Rev 1 to PSL-ENG-SEFJ-98-013, St Lucie Unit 2,Cycle 10 Colr.
ML17229A9461998-08-0707 August 1998
Rev 0 to PCM 98016, St Lucie Unit 2,Cycle 11 Colr.
ML17229A8301998-07-31031 July 1998
Monthly Operating Repts for July 1998 for St Lucie,Units 1 & 2.W/980814 Ltr
ML17229A8201998-07-29029 July 1998
LER 98-007-00:on 980630,inadequate Procedure May Have Resulted in SBO Recovery Complications.Caused by Inadequate Procedures.Attached Caution Tags to Appropriate Control switches.W/980729 Ltr
ML17229A7981998-06-30030 June 1998
Monthly Operating Repts for June 1998 for St Lucie,Units 1 & 2.W/980713 Ltr
ML17229A7701998-05-31031 May 1998
Monthly Operating Repts for May 1998 for St Lucie,Units 1 & 2.W/980612 Ltr
ML17229A7411998-05-28028 May 1998
LER 98-004-00:on 980430,discovered Waste Gas Decay Tank Operation W/O Available Oxygen Analyzers,Which Is Prohibited by Ts.Caused by Inadequate Licensee Review of License Amend. Oxygen Analyzer recalibrated.W/980528 Ltr
1999-09-30
[Table view] |
Text
CATEGORY j.
REGULAT INFORMATION DISTRIBUTIONSTEM (RIDE) g1 ACCESSION NBR: 9612160224 DOC.DATE: 96/11/27 NOTARIZED: NO DOCKET '0 SCIL:50-335 St. Lucie Plant, Unit 1, Florida Power 6 Light Co. 05000335 50-389 St. Lucie Plant, Unit 2, Florida Power 6 Light Co. 05000389 AUTH. NAME AUTHOR AFFILIATION KNECHTFW.G. Anchor/Darling Valve Co.
RECIP.NAME RECIPIENT AFFILIATION CARTER,J. NRC No Detailed Affiliation Given
SUBJECT:
Part 21 rept re 2"-1878 globe piston check valves.A/DV plans to include philosophy of both enhancement w/smaller piston check valves.A/DV evaluated found condition of piston check valve, stuck open.
DISTRIBUTION CODE: IE19T COPIES RECEIVED:LTR ENCL SIZE:
TITLE: Part 21 Rept (50 DKT)
NOTES:
RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL 1D CODE/NAME LTTR ENCL PD2-3 PD 1 1 WIENS,L. 1 1 INTERN . IL CENTER 0 1 1 NRR/DISP/PSXB/B 1 1 NRR/DRPM/PECB 1 1 PDR WARD, M. 1 1 RES/DET/EIB 1 1 RGNl 1 1 RGN2 1 1 RGN3 1 1 RGN4 1 1 EXTERNAL: INPO RECORD CTR 1 1 NOAC SILVERFE 1 1 NRC PDR 1 1 NUDOCS FULL TXT 1' 1 D
U E
OCUL Pg
~~ SCAggpo NOTE TO ALL "RIDS" RECIPIENTS:
PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM OWFN 5D-5(EXT. 415-2083) TO ELIMINATE YOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!
FULL TEXT CONVERSION REQUXRED TOTAL NUMBER OF COPIES REQUIRED: LTTR 15 ENCL 15
Anchor/Darling Valve Company ~ Williamsport, PA 17701 W. G. KNECHT Technical Director November 27, 1996 Mr. Jerry Carter US NRC Events Assessment Branch Washington DC 20555
Subject:
A/DV l878 Class Piston Check Valves
Dear Mr. Carter:
Per our discussion this date the enclosure is the latest copy of our report to FPSL regarding the piston check valve problem.
Should you have any questions please do not hesitate to call Floyd Bensinger, our Engineering Manager, or the writer.
Sincerely, ANCHOR/DARLING VALVE COMPMY u,rlW4f-William G. Knecht Technical Director WGKjs cc: F. A. Bensinger Enclosure 96i2i60224 96ii27~i PDR ADOCK 05000335 8 PDR
Anchor/Darling Valve Company Page 1 of 4 701 FIRST STREET P.O. SOX 3428 WILUAMSPORT, PA 177014428 (717) 3274800 FAX: (71 TJ 3274805 Florida Power and Light Company St. Lucie Plant P.O. Box 128 Fort Pierce, FL 24954 November 20, 1996 Attention: D.J. Denver St. Lucie Engineering Manager
Subject:
A/DV 2"-1 8780 Piston Check Valves
Reference:
- 1. FP&L JPN-SPSL-96-0372, August 16, 1996 Letter
- 2. NDV S.O.'s ET401 and RZ814
- 3. NDV Test Report No.'s RZ814, Test Report of Flow Test on a 2"-18780 Globe Piston Check Valve, October 2, 1996 Gentlemen:
NDV apologizes for the delay in responding to the referenced FP&L letter. We had hoped to receive application responses to our notification letters but as of this writing we have not received any complete information.
NDV has performed a design review of the piston check valve with the intent to address the functional and re-assembly problems experienced at St. Lucie. The following areas were addressed as noted:
A. Pr re e I/Bonn Are I m Bonnet Retainer Capscrews FP8L reported having difficulty in sealing the ADVanseal using the capscrew without pressure. The current capscrew is a 5/16" diameter capscrew. A 1/2" diameter capscrew will be used in the future. This will provide approximately three (3) times the gasket load.
- 2. Galling of the Bonnet Retainer Threads FPBL has experienced galling of the bonnet retainer threads. The current retainer is made of 316 stainless steel with chrome plated 12 series threads. NDV is evaluating replacing this design with a 17-4PH bonnet retainer (no chrome plating) with 8 series threads.
Assuming successful completion of the new bonnet retainer evaluation, this design will be put in place.
A/DV plans to include the philosophy of both enhancement with the smaller piston check valves. These two (2) enhancements will affect inventory and part interchangeability.
B. CI nin D in fV lv s Prior hi men NDV has evaluated several methods to assure complete drying of the piston check valves prior to shipment, i.e. disassembly, baking, etc. We have concluded that the most effective method is to disassemble the valves after hydrostatic testing, dry the parts and reassemble without the gasket and anti-rotation pin (Part No. 258) installed. The gasket and anti-rotation pin will be packaged with the valve and a tag placed on the valve requiring installation of these two (2) parts after valve installation.
V Iv Perf rm nce F n ional I m Disc Guide Area of Body Neck Bore We evaluated this area to determine if the body guides could be improved. Several methods were evaluated, i.e., steeving the body bore with hardened material, reshaping the exhaust port, etc. All methods are costly. The conclusion was reached that the above changes were cost prohibitive and the better resolution is to use a smaller valve for oscillating flow application in order to place the disc in a more open position where it is better guided by the body.
C. Valve Pert rmanO Func Ion I Items (Conttnued)
- 2. Disc - Body Material Couple tt was stated by FP8L that fretting is more apt to occur where a large difference in material hardness exists. A/DV selected the body-disc material couple for wear resistance, galling resistance and castability, weldability of the bodies.
A more important factor to reduce the potential for fretting is reduced stress levels. NDV does not plan to change the body or disc materials. As discussed in A.1. above and in the later root cause analysis, use of a smaller valve would resolve this situation.
Rough Machining left in the Body Neck Bore In May, 1993, NDV had changed its rough machining process to setup and rough cut the neck bore and seat pocket using the same setup method and single point tooling-boring as the finish machining process. Prior to this time the neck bore was rough machined on a radial drill. This drilling process was not always performed on the same centerline as the final machining and the drill had a tendency to tail off center. This area has been resolved as described above in May, 1993.
Ratio Guide Length - Disc Diameter NDV's design criteria limits the potential disc tilt to less than 1/2'nd requires a ratio of one (1) or greater for the disc, guide length to diameter.
The 2"-1 878¹ Piston Check disc has a ratio of 1.12:1. Both NDV's design criteria and the 2"-1 878¹ design are representative of NDV and competitive valve designs which have been proven to be successful in most services.
Roo C s NDV evaluated the as found condition of the piston check valve that stuck open.
To assist in our root cause analysis, we performed flow tests on two (2) 2"-1878¹ Piston Check valves (one (1) valve returned from FP&L, S/N ET401-9-6).
Reference No. 3 Report, enclosed, documents the task and results. The testing was performed to evaluate valve performance at various forward flow rates. The test conclusion was the valve always closed when forward flow ended.
Eg As a result of our evaluation of the FPBL failed valve and our testing, we have concluded that the root cause is the disc oscillation, caused by the reciprocating pump, causing fretting to take place in the valve body disc guide area. The fretting area provides a configuration in the body guide that allows the disc to stick open without forward flow and with reverse flow.
A/DV's recommendations to eliminate the valve operational problem are (preferred listed first):
A. Use of in-line check valves in reciprocating pump applications. This valve design provides better wear resistant materials as disc guides throughout the entire valve stroke.
~~
Use of smaller piston check valve (valve size or reduced port) in reciprocating pump applications to more fully open the disc where better body-disc guiding is available. Attached are graphs of flow rate versus disc position and Cv versus disc position to be used to evaluate T-pattern piston check valve size selection. Where a smaller T-pattern piston check valve
~
produces too high a pressure drop, use of a Y-pattern piston check valve may resolve this concern.
T-pattern and Y-pattern piston check valves and in-line check valves are within A/DY's product lines. Availability of Y-pattern piston check valves is sclleduled for the second quarter of 1997.
lf further discussion is required on the above, please feel free to contact us.
ANCHOR/DARLINGVALVECOMPANY Floyd A. Bensinger, P.E.
Manager - Engineering bcc: J. Chappell G. Parks T. Johnson J. Tarbutton W. Knecht'G; H. Wescott Kneiser F. Velez R. Maietta
2" 8c Smaller T Piston Check Valves ~ ~ FAB 01-Nov-96 Flow Coefficient (Cv) vs. Disc Position 50 40 30 C
EJ 0
20 10 0
0% 20% 40% 60% 80% 100%
Disc % Open 1/2" PCs + 3/4" Bc 1" PCs O 1-1/2" PCs 2" PCs
2" 8c SmaIIet T Piston Chec k Va Ives ~ ~ FAB 01-Nov-96 Air Flow Rote (cfm) vs. Disc Position 350 300 250 200 150 100 50 0
0% 20% 40% 60% 80% 100%
Disc % Open 1/2", 3/4" 8c 1" P.Cs + 1 1/2" PCs <> 2" PCs
2" Bc Smaller T Piston Check Valves ~ ~ FAB 01-Nov-96 Water Flow Rote (gpm) vs. Disc Position 260 240 220 200 180 160 140 120.
100.
80 60 40 20 0
0% 20% 40% 60% 80% 100%
Disc % Open 1/2", 3/4" Bc 1" PCs + 1-1/2" PCs <> 2" PCs
PART CTY DESCRIPTION MATERIAL NO REVISIONS 001 I BOOT SASS I~5M DELETED MOTE 5: OY S N, 002 I BONNET SA47~16 ADDED Mofds e THRU lo.
004 I DISC SA65IP560 TYPE I CUSTOMER NOTEADOEO UNITS ACW A ANO VALVE DATA SHEET NO.
015 I SEAT RINC A276.S21600A DELETED CUST. P.o. No. dc I HI2 050 I PRESSURE SEAL CASKET GRAPHITE MOVED A/OV S.o. No. TALE 052 I SPACER RING A47~16 BLOCK: DELETED "CLOSE 054 I BOMNET RETAINER SA479-51 6 215 I BONNET CAPSCREW A574 256 I ANTHIOTATION PIN AISI 502 (SPRINC TTPE 260 I WIRE ER516 545 I NAMEPLATE AISI 504 545 I IDENTIFICATION PLATE AISI 504 429 I SPRING INCONEL X NOTES I. VALVE IS ASME CLASS I PER 1965 ASMK SKCTIOM R 7. 4 - ASMK PRESSURE BOUNDARY PART
- 2. APPROX VALVE WEIGHT 24 LBS d. CRACKIMC PRESSURE 5 PSI
- 5. APPROX CV 56 9. ANSI 1676 STANDARD INTERPOLATED PRESSURE CLASS
- 4. PISTON CHECK VALVE DESIGNED FOR MOUMTINC IN A lo. HYDROSTATIC TEST INFORMATION:
HORIZONTAL RUN OF PIPE WITH VALVE ENDS HORIZONTAL SHELL SEAT AND BONNET ON TOP PRESSURE (PSI) 5775 4956
- 5. VALVE DESICN PRESSURE IS 2755 PSI AT 6do F ALLOWABLK LEAKAGE (CC/HR) 0 3
- d. MINIMUM FLOW DIAMDER 1.500 DURATION (MIN) 10 5 SEAT RING INSIDE DWlETER ~ 1.500 25d 054 215 CO 052 050 002
)C CI O IL O!
~o 0 O oo5 W
~ FO El 429 0 O.
Vl 004
>C 001 O
I:
IL 015 FLORIDA POWER R LIGHT COMPANY ST. LUCIE UNITS I R '2 SPECIFICATION No.: MN 5.06 VALVE DATA SHEKfl YDSPSL&IO ' Y. ~
ANCHOR DARLING VALVE COMPANY 2"-1878
.52 MIM .520 MIN SECTION AA Zeo FULL PORT 545 SOCKET ENDS STAINLESS STEEL FLOW 546 PISTON CHECK VALVE df NONWOBALT TRIM ON BY.'AlQHI P 9AIO 00302 10 I 92 I T'~l 'T~
QI 9ll 21 2P S 71 O ET401% APPO 6II RFB ega IO-IIHI2 I 2 5 4 5 ~ 7 6
