ML20113C916

Final Part 21 & Deficiency Rept 85-02 Re Failed Latch Roller Bearing in MSIV Actuator Supplied by Crosby Valve & Gage Co.Initially Reported on 850227.Bearing to Be Replaced W/Modified Latching Mechanism by 860101

ML20113C916
Person / Time
Site:	Beaver Valley
Issue date:	03/27/1985
From:	Carey J DUQUESNE LIGHT CO.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
REF-PT21-85-164-000 2NRC-5-053, 2NRC-5-53, 85-02, 85-2, PT21-85-164, PT21-85-164-000, NUDOCS 8504120111
Download: ML20113C916 (12)

Text

{{#Wiki_filter:. i ,e NVs 'Af \\ <$[a-541 No"Nn P aza?B Telecon 1 Idi g Suite 210 Plusburgh, PA 15205 March 27, 2985 United States Nuclear Regulatory Comission llegion I 631 Park Avenue King of Prussia, PA 19406 ATTENTION: Dr. Thomas E. Murley Administrator

SUBJECT:

Beaver Valley Power Station - Unit No. 2 Docket No. 50-412 EFC0-600 Actuator Latching Mechanisms for MSIVs Potential Significant Deficiency Report 85-02 Gentlemen: This final report is in reference to the Potentially Reportable Significant Deficiency relating to the EFC0-600 Actuator Latching Mechanisms for MSIVs supplied by Crosby Valve & Gage Company. Pursuant to the require-ments of 10CFR50.55(e), it is anticipated that no additional reports will be j submitted to Region I. DUQUESNE LIGHT COMPANY By arey (/ resident SDH/wjs Attachment e cc: Mr. R. DeYoung, Director (3) (w/a) Mr. B. K. Singh, Project Manager (w/a) Mr. G. Walton, NRC Resident Inspector (w/a) INP0 Records Center (w/a) NRC Document Control Desk (w/a) SUBSC IBED AND, ORN TD BEFORE ME THIS DAY OF t//) 1985. llLl/L $ 6Lf111th Notary Public 8t04120111 % h12-Lil P ; i ' ' M i ' '- PDa ADOCK PDR

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Unitsd States Nuc1:ar Regulatory Commissicn Dr. Thomas E. Murley Potential Significant Deficiency Report 85-02 - Page 2 CONONWEALTH OF PENNSYLVANIA ) ) SS: COUNTY OF ALLEGHENY ) On this [M/jday of //b before me, a A 7 Notary Public in and for said Commonwealth and County, personally appeared J. J. Carey, who being duly sworn, deposed and said that (1) he is Vice President of Duquesne Light, (2) he is duly authorized to execute and file the foregoing Submittal on behalf of said Company, and (3) the statements set forth in the Submittal are true and correct to the best of his knowledge. NAnh 7a w ~ Notary Public j7. tug L.,an m.m. peg.g . -{ bC1'N a,m = , 1., y,, 9 i

BEAVER VALLEY POWER STATION - UNIT NO. 2 DUQUESNE LIGHT COMPANY Report on Potential Significant Deficiency No. 85-02 EFCO-600 Actuator Latching Mechanisms for MSIVs 1. SUMARY ' During vibration aging and seismic testing of Main Steam Isolation Valve (MSIV) actuators for Nine Mile Point - Unit 2, a failure was observed of the latch roller bearing in an.MSIV actuator. Duquesne Light Company (DLC) was subsequently. notified by the manufacturer of the actuators that similar failures could occur in the MSIV actuators supplied for BVPS-2. 2. IMEDIATE ACTION TAKEN On February 27, 1985, Mr. S. D. Hall, Lead Compliance Engineer in DLC's Regulatory Affairs Department, notified Mr. Lowell Tripp of the NRC Region I Office of this potential significant deficiency (SDR 85-02). 3.. DESCRIPTION OF THE PROBLEMS The failure of a latch roller bearing occurred in an EFCO-600 actuator manufactured by Gulf & Western Fluid Systems Division (G8W). These actuators are used in conjunction with MSIVs also manufactured by G8W. Following the acquisition by the Crosby Valve and Gage Company (Crosby) of G8W's ball valve operations, Crosby supplied BVPS-2 with three EFC0-600 actuators and three 24-inch MSIVs under purchase order 2BV-211. The EFC0-600 actuators use a hydraulic system which opens and latches the MSIV while simultaneously compressing springs that are used to subsequently close the valve. With the MSIV in the open position, the force of these springs is transmitted through the latching mechanism to the latch roller bearing. Failure.of this roller bearing, which mani-fests itself as a crack that results in a flat spot on the bearing's round surface, could prevent required movement of the bearing rendering the latching mechanism inoperable and the valve stuck in the open position. Crosby and G8W have determined, following testing to verify the actual loads on the latch roller bearings, that the static and dynamic loads on the bearing exceed the maximum design loads specified by the manu-facturer of the latch bearings. 4. ANALYSIS OF SAFETY IMPLICATIONS i The BVPS-2 MSIVs are required during certain design basis events to isolate the steam flow path from the steam generators to preclude uncontrolled cooldown 'of the reactor coolant system. Failure of the latch roller bearing, -due to excessive loads on the bearing, could prevent the MSIV actuator from closing the valve, thus jeopardizing the safe shutdown of the plant under design basis event conditions. I i f

5. CORRECTIVE ACTION TO REMEDY DEFICIENCY The latch roller bearing in the MSIV actuators will be replaced by a modified latching mechanism. Tests currently being perfonned by Crosby and G8W indicate that a sleeve type bushing may function adequately under all postulated loading conditions within the actuator. It is anticipated that, following scheduled completion of the manufac-turer's tests, the latch roller bearings in the BVPS-2 MSIV actuators will be replaced with qualified sleeve type bushings by January 1, 1986. 6. ADDITIONAL REPORTS This is the final report regarding the potential significant deficiency with actuator latching mechanisms for MSIVs. It is anticipated that no additional reports will be submitted. l l l I

UR I PRC Non-Conformance Report SDR 85-02 BEAVER VALLEY POWER STATION UNIT 2 NR A. Description of Potentialitem: During the course of a Vibration Aging and Seismic Testing Program of EFCO-600 Series actuators manufactured by Gulf and Western Fluid Systems Division, a~ latch. roller bearing failure occurred. The bearing is the latching roller located on the blocking lever mechanism. The EFCO-600 Series actuators are quarter turn actuators used to. actuate MSIVs manufactured by Gulf and Western Fluid Systems.- Static load tests conducteti by Crosby Valve and Gage Company showed that the static loads imposed on the bearing exceeded the bearing manufacturer's maximum published load. These were for-the Nine Mile Point Plant. 3 ~ B. Affected Structure (s), System (s), Component (s), or Activity (ies): z 3 - EFCO-600 Actuators and MSIVs - u ~ g s k ~ e ~ 20 9 ~ z C. Preliminary Safety Evaluation and Reportability: cc A failure of the latch roller bearing in service, would render tne MSIV' 5 inoperative; and under the' provisions of 10CFR50.55(e), this~ is. being reported-as a- ] potential sigpificant; deficiency.. g t ' ' ~(i.ehrer dated 2-15-R9f ~ D. Reported by: W.~ D. Greenlaw - 2-26-85 Crosby Valve and Gage Company ' ~ . o t. ore nia tiot. -Nam.- i ~

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won,, ne,ui tory ave.m o.t. Tim. F. NRC Report Status N Initial Notification. On 2-27-85 at 21: 15 to Lowell Trico O.te. Time Name of N RC Person r evLajaphoa* I I Tal*aram i I Lett'r I I ott'er z mM E By s. n. nuit rnr { g ..n., a. so..to,,,,,s,. 2.. Interim Report (s) Submitted on: Date Lett4r No. Q.tt Letter No.

3. Final Report submitted on:

Date Letter No. Nuclear Construction DMelon File

e,' "$[8"C0hY -T / _ 3 / 7 A' DATE: p ) V d TO: i THE ATTACHED TELEC0FT WAS JUST RECEIVED FOR YOU FRON: 1 6 /7-f97-7Jo/ Paoul: /W 6C - 8cred LocATrom: ~ $p O g~ v~ 22u/d M g// 7 or<;- a 9747 l srECza Ran u ts: y) 17 /c s TOTAL NUMBER OF PERS RECEIVED IN THIS TRANSMITTAL EXCLUDING THE FACE: Y e RON HOGUE EXT. 148 y_,_,,,,__-.s__-._ ,,,..,.,.,.,_,,,y.r_-,- 77 _-7,_ -..m__.r-y

O EROXcTELECOPIER 495;19-3-85;10:15 41 -+ 4127872629:O 2 1 BEAVER VALLEY F0WER STATION - ITNTT 2 I n DuglIESNE LICHT COMPANT REPORT ON POTENTIAL SIGNIFICANT DEFICIENCT WITH ACTUAICR LATCHING i a NECHANISMS 10R MSIVs, (DLC SOR 85-02) 1-SWHAM During vibration aging and scismic testing of Main Steam Isolatiou Valve (MSIV) actuators for Niue Mile Point - Unit 2, a failure was observed of the latch roller hearing in an MSIV actuator. Dug'.tesne Light Company (DLC) was subsequently notified by the manufacturer of the actuators that similar f ailurcs could occur in the MSlV actuators supplied for BVPS-2, 2 TMMEDIATE ACTION TAIGN On February 27,1985, Mr. 8. D. Hall, Lead Compliance Engineer in DLC's kegulatory Affairs Department, notilled Mr. Lowell Tripp of the NRC Region I Office of this potential significant deficiency (SDR A5-02). 3. DESCRIPTION OF THE PRORLFM Tha f ailure of a latch roller bearing occurred in an EFCO-600 actuatoe manuf actured by Gulf & Western Fluid Systems Division (GW)4 These setuat. ors are used in conjunction with MSIVF also manuf actured by C&V, Following the acquisition by the Crosby Valve & Cage Company (Crosby) of G&V' r. hall valve operations, Crosby supplied BVP3-2 with three EfCO-600 actuators and three 24 in. Msivs under purchase order 2RV-211. The EFCO-600 actuators use a hydraulic system which opens and latches the MSIV white simultaneously compressing springs that are used to subsequently c]ome the valve. With the MSIV in the open positloc, the force of these springs is transmitted through the latching mechanism to the latch roller bearing. Failure of this roller bearing, which manifeste itself as a crack that results in a fl at. spot un the hearing'F Tound surface, could pre 7 cut TCquired movement of the bearing readering the latching enchanism inoperable and the valec stuck in the open position. Crosby and G&w have determined, following testing to verify the actual loada un the latch roller bearings, that the static and dynamic loada the hearf ng exceed the maximum design loads specified by tbh menu-on cp facturee of the latch bearings. k AXALY3IS OF SART7 ImLICATIONS a The BVPS-2 MSIVs 4rc required dueing certain design basis events to isol.ste the atesis fluv path from the stram gen rator4 to preclude uncontrolled cooldown of the ree: tor coolant system. Tailure of the latch roller bearing, due to awcessive loads on the bearing, could prevent. the MJ1V actuator true closing the valve, thus jeopaedLt. tug the safe shutdown of the plaut, under design basis event e:cuditions. E4-1224106-146

. XEROX.TELECOP!ER 495:19-3-85:10:1941 4 4127872629;** 3 l 2 BRA FT- ~ 5. CO,RRECTIVE. ACTION 70 IEHLUY defic 1ENCY The latch roller bearing in t.he MSTV actuators will be replaced by a modified intching mechaaisin. Tests currently beine, performed br crusby and C&W indicate that a sleeve type hushing may functir.in adegustely under all postulated loading cowlitions within the actuntor. I it is anticipated that, following schedoled coprpletion of the canu-I&' ters' tests, the latch roller bearings in the BVes-2 ftSIV actu-ators wi)) he replaced with qual 111ed sleeve type bushings by .Tanuary 1, 1986. 6. @DITIONAT. REPORTS This is the final report regarding the potential signtiteant deficiency with actuator latching mechanisms for MSIVs. It is anticipated thst no additional reports vill he suhaitted. 16 4-84 122410G-145

-TEL).ELCO(P,Y 3 ?/ 25~ om: 1 t TO: j I 4 THE ATTACHED TELECOPY WAS JUST RECEIVED FOR TOU FROM: A A Do A<2 en,ec/ci nmE: f / 7-fn -/Jo y reaME: 9 et - /%,nJ LOCAT10m: 20ts-ayW7 SU m CT: SPECIAL REMARES: f TOTAL NUMBER OF FAGES RECEIVED IN THIS TRANSMITTAL EXCLUDING THE CO 3 i FnGE: RON HOGUE EXT. 14 4 a j .. _. _ ~. _. ~. _. _ _ _. _. - _.. ~.

c AAUa r,cubrock. At t u sororil:, bTIEi t s rt(enc ) / flanap,exent Cent.cr( ene) Gt!Schicehern(ene) y' Copy t.o: Si t e <lin,t r ihnt. ion t y ktlC, N.Wi t.t u rhen/ SEU (ene) F.TWoo teve r-1(.! ent. ) I copy each Lo: IMayer/Pfl Ek(ene) REUovaber CChing(e:N) JEWillii.mn FDI.Timenez R.!Swiderski(ene) t tf aye r/.loti _II.Kv e p 1 i n ge r f(Coo pl and(ene ) !!k 20/- /.4(enr) Jiti,a t.nhaw.J t. RRhein(eve) v112cial Fite HCSchopper TPNovoi.n( en e) (Thi Acet) (TCrcLz At.tleintyre-/(? cne)/3EC At(Joyce (enr ) .l.Illauntlet,Jr. 't .TR ADa n MDT.ynrh(ens) 1,riecnt.one Ohio Rd. 111 yer/PE Bk(enc) WC 245/9 SDHall(ene) .illFie t chc r( ene ) (R4-1224106-140) Et hu r t :(cur) wen ranow :k A (vor) Genetel Plen RRRradbuty(cnr) AL4Dob rzen i e et A (co r ) Mr. E J. Woolever . March l'), 198') Vice President,. Nuclear Const t ort ion Utv;, ion .T.G.No. 12244 Unquenne 1.tght Company Robinsuu Plaza illdg. No. ?. 2DI.S 24 74 7 RW6503190004 S u t t i-110 PA IIoute 60 Pittsburgh, PA 15705 llEAVEN VAT.T.F.Y POWER STATION - ITNIT NO. 2 J 0.No. 12241-6.F.E.NO. 10080-C.O.NU. eJ84 POTEN11A1 $1CNIFICANT DF.FTCIENCY WTTl!PIS1V 3'lUATOR 1.N!JiHINC ?!ECllg t,S:13 (DT.C,S'JR 83-0? )

Reference:

20LC-A010.l.s ted fla rch 1.1, l')85 in the let.tvr retetenced above, Dnquenne 1.4 ght Comp.sny (DI.C ) f orwarded to Steue b Weh".Ler Engineering Corpor,sLion ( %7.C J,: r eport reg.sidint, ponuible tailures of soller beatAngs in !!SIV actuators (SDR SS 02). %'l:C has re-viewed SDR 85-02 and, a; docua.cnted in tlo; at i ached report, venunden that the subject conditions septenrnt a pot enLi a l etAniticaut deficiency 4 t. kVPS-2 that me e t.u the c ri t eria lor repo r t.a bi li t y undes the p rov a s, s on *; of 10CtF5n.55(e). If you have any questions re g.a ril a ng thin ts<ne, pleast contatt lls..I. E. Niland at (61/) 589 22:14 or Mr. A. l1. Uobrzeniecki at (617) 589-/:104. / ( /[.- - b'. H. Bobike $r;nior Project Manager htK hturc AllU:suja AN/NAR C t !679'*.'.9a?It-f W6G :OI !59-E -T? !56t' d7IdO:'T131 > Od3x

i i I BLAVt;R VAT.!.EY POWER STATION - bSIT 2 D(!Q1T.SNE I.1GH1' COMPANY REPORf US POTENTI A1. SJ CNIFICANr ut.FICTENCY WITH ACT11ATOR 1.A1CHING MF.CliAN_l SMS FOR HS,1,V,5 (DLC SDit, t}} 02) 1. 311?ftfARY During vibtetion aging Jod scismic testing of fl.s i n St. cam inoL4Livo Valve (MSIV) actuator". for Nine Mile Point - lir i l 2, .: lailure w.i n ohnnrved ot the latch toller hearing in an MSIV sctuator. Duquesac !.ight Company (D!.C) was.ubsequently notified by the manufacturer of the actustors that nimi t.s t tailuren could uccur in the MSIV Artnator s uppiled loc '.WPS-2, 2. IM?qni_ Api AC11ON TAK,liN, on f'ch rua ry i t. 19ft'., Mr. S. D.11411, I.nad Cempl.n aner Engineer in DT.C's Re gu l a t.ut y Affairs Depa r t me n t., notil ts;d f1r. l.cwell Tripp of t.he hKC Regson i Offit.e vi this potent ral si gni fic.snt de fi.-i cnry (SDR 85-02). .i. DESCRTPTTON,,0F 'I E PR011,T.3 latt.h roller bearing orrurred to an EFCO-600.scluator The tailure of a manufactured by Gul f & Western Fluid Systems Diviniou (UA); these actuatute are used in on.innet. ion with MSIVS alr.o manufactured by GGW. Following the acquisition by t.he Croshy V.sive & Cage Company (Crosby) of GLW'u ball valve operations, Cros13y supplic6 nVPS-2 with three EFCO-600 act uators.sud thter 24 in. MSIVs under purchase order 2nV-211. The EFCO-600 art.uators use a hydr.suliv system which opsnu and l at.ches the MSIV while simultancounty comprenning uprings thal are used to subsequently close th e-v.s i v e. With t.he t1SlV in the open position, i.h e tvree of thene springs is t ranumatt.ed through the latching mechanism to the latch tviler hearing. Failure of this roller beartug, which manifests sinelf ar a crack LhaL tesult% in a 118t spot on the bearing's ruund sncface, could psevent. required movement ut the tiraring rendering the lat ching ice hani sm incperable and the valve stuck in the c open pusarton. Crosby and GSW have-determtned, following testtng to verify the actual loads on tbc latch coller hearing... that the NLJt1C aQd dynamir lOad4 un tbc hearing exceed the m.sximum design l o.s d v sperifind by the manu-facLurer ul the IJLeh bearants. 4 ANAI.YS,1,s. 0F SAIETY IMI'I.1CA'fl0NS The !)VPS 4 2 MSlVS are required during t.r: Lata denign basis e ve n t.r. Lo i nol.s te the steam flow peth trum the steam generators t.o pret.lude nuc'not rol l ed coulduwa of t.he reactor coolant cystem. Faiture of the l a t.rh rollet bea ri ng, due to cxecnnive ludds on the beatlog, could prevent the HSiv act.udtor from closing the valve, thus jeopardir.ing the amic shut.down ut the plant. undet design basin event conditinnu. B4-1224106-146 t, a r6292a94rit-t t r.4 o :Ti rsa-c -tz rset staamm >om

o A i l 4 5. cop.bF CT I V. E. A..CT T ON To llEM.E1)Y IV.F I C I EN. C. Y i. I the 1.a t ch roller hearing in th. $1S!V ntuators will be repincil by.s i modi f iet! latchi ng mech.itia stn. Tizt> currently buian performed by Crosbv l arid Ubk' i n.li ca t e tlia t a ileeve type bushing may funttroo.oleyttately under all postulated louding conditions wit.hiri the: a c t u a t.o r. I l it is ant i c ip,s t ed that, following i,c!:edul e.1 completion of th e-ru n n - l' +.ir tu r e r s ' t e r t.., t.h e 1.i t c h re i j e t; bea ri n gr, an the DVPS.2 !!sIV actu- .s t o r s will be replarcel wi*h qual 212cd nieeve type hu hings by .J anu.a r y 1. I') Me.

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l l$ i s is 1.he froAl r"gort t ega veli ng the :iot ent ia l t Agni ficant delicacewy I with actuator latthtag mechani,ms lor MSIVr it i r anti c i p.st. d that. in. add ..Dal reputts wi11. be s ulm i t t.eil. b4-l'??410n-146 S

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ns,~- Grcsby Vcivo D - & C :;m i = ~ ' 4 W o T Case Company A w eocomoany M P O Box 308 43 xenonca sueet MOORCO Wrentnam. Massachur as 02093 Telephone. 617/384-3121 d '# Telex 924443 February 15, 1985 Director. Office of Inspection and Enforcement U.S. Nuclear Regulat.ory Commission Washington, D.C. 20555 Gentlemen: During the course of a Vibration Aging and Seismic Testing Program of an EFCO-600 Series 600 Actuator manufactured by Gulf & Western Fluid Systems Division, a, latch roller bearing failure vae observed. The hearing is the latching roller located on the blockiig lever mechanism. These tests were being conducted under a contract from Stone & kbster Engineering Corporation, the designated Architect / Engineer for Niagara Mohawk Power Corporation for the Nina 1 tile Point Plant. The EFCO-600 Series Actuators are quarter turn actuators used to actuate (on/off) tain steam isolation valves OtSIV) that were manufactured by Gulf & Westerm fluid Systems Division'formerly of 25 Greystona Avenue Warwick, RI 02886. Subsequent to the bearing failure a static load test was conducted on an identical bearing installed in the EFC0 Series 600 Actuator to determine the actual static load on the bearing. These static load tests were conducted at the Crosby Velve & Gage company Wrentham, Massachusetts, under contract to Stone & Webster. These tests showed that the static loads imposed on the bearing exceeded the bearing manufacturer's==w4-= published load for that bearing. (Torrington Bearing Design Number 28NBL4855YJ.) ~ Since failure of the bearing in service would render the main staan isolation valve inoperative, Crosby Valve & Gage Company and Gulf & Western Manufacturing Company have determined that, in chair opinion, a probable cause for reporting under 10CFR21 exists. yo%CYO A world of pressure relief technology... for the future. .O

,5 s U.S. Nucle:r Regulatsry Cosmiccion Tcbruary 15, 1985 .. To the best of Crosby's knowledge the following is a comple:e list of ETCO-600 Actuators that have been manufactured and delivered: Gulf & Western Shop Order Size h Owner /lacation Quantity 1732 28" MSIV Consumer Power Corporation 4 Midland 13 nits 1 & 2 1798 24" MSIV Duquesna Power Company 3 [ amaver Valley - 13mit 2 4 2471 20" FWIV nac taibetadt 2 2473 24" MSIY BBC !aibetadt 4 253g 24" MSIY Niagara Mohusk Power Corp. 4 Nine Mile Point 2 4 2540 24" isIV Niagara Mohawk Fower Corp. Nine Mila Point 1 Gulf 6 Western Manufacturing Company of 26261 Evergreen Road, Southfield, Michigan 44076, has notified ther Constner Power Corporation, Duquesna Power Company and BBC Iaibetadt of the tasc results and the possibility '1 that the latch roller bearings la their actuators any be subject to failure under similar test conditions. Niagara Mohawk Power Corporation has been advised of the bearing problem by Stone & Webster. Work has begun on the design of a FeW bearing and retrofit Package for this application. La anticipatina of specific direction from Gulf & Mestara Manufacturing Company and Stone & Webster. 1 Very truly yours, 9). W. D. Greenlaw Vice Frasident - Engineering I WDG/da Distribution List Attached 1 4 1

~ ~ ^ ] c. 4 U. S. Nuc1:ar Esgulat ry Comeis; ion Fchruary, 15, 1985 Distribution List cc M. Bauer Gulf & Western Manufacturing Company 26261 Evergreen Road Southfield, Michismo 4C376 ces E. Doppelt Gulf & Western Manufacturing Company 1 Gulf & Western Flaea New York, New York 10023 cc Mr. Y. A. Andersen Director of Purchasing Censumere Power Co p y 212 West Michisma Avenus Jachsen, Miehissa 49201 ces Mr. E. A. Vem Messen Project Manager [ Duqueena Lisht Company 435 sixth Avemos Pittakurt,Peensylvania 15219 h cc: Earakraftwerk Laihetadt AE CR 4353 Leibetadt, SWITEIRLAIS 4 ect. Mr. J. T. Missabytaaski ~ lemmager Centreat Adudaiatraties Niagara Mohauk Foeur Corporation 300 Eria Blvd. Meet Syracuse, New York 13202 ces R. G. Friend - Crosby J. J. Greene - Crosby , R. T. Levis - Croeby J. F. Weltar - Crosby }.

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