ML20085A979

Forwards Surveillance Instructions Sent to Customers Re Previous PORV Failures

ML20085A979
Person / Time
Site:	Crane
Issue date:	09/10/1979
From:	Hallman D BABCOCK & WILCOX CO.
To:	Mullin J BABCOCK & WILCOX CO.
References
TASK-01, TASK-02, TASK-06, TASK-1, TASK-2, TASK-6, TASK-GB GPU-0544, GPU-544, NUDOCS 8307070447
Download: ML20085A979 (9)

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4 THE BABCOCK & WILCOX Ct,.#AIJY t.

k POWER GEllERATION GROUP L-r; To l

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J. C. Hullin. Contracts-Legal t-p, From t

D. F. Hallman. Manager. Plant Perfo nee Services Section File No.

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Presidential Comission Date L

Instructions Sent to Customers Concerning h-Subj.

Previous PORV /aflures September 10. 1979 g:g_

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I have been abic to find only one Si dealing with P03h failures.

It is P

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RD6-I-131 Mr. J. G. Herbein Manager, Generation Operstions-dalaar *

-f Metropolitan Edison Co pacy Post Office Box LSO Middletown, PA 170FT_

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Sub.j ect: Preventative Maintenance fuggestions for the RC-RV2

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' Pressurizer Electromagnetir Zelief Yalve i

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Dear Mr. Herbein:

B&W has had experience at other sites with ccrrosion products causing the pressurizer electro:ssnetic relief " salve (3C-RV2). operator lever

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arn to remain in the ported position after actuation of the relief.

This fa'ilur's prevented valve closing vhich caused overpressurization

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of the RCUT and rupture dis: actuatics. It could also have violated the fuel conpression requireisents, RCP-3PSH requiremen'ts, a=d cool--

dovu rate.

a-E&V therefore suggests that RC-R72 (Pressuri:er Electromag= etic relief valve) be inspected periodically for corrosion products and fol-free-do:s of novament with respect to the lever. pin and lever hi'nge noting -

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e clearances with the solenoid bracket.

B&W also suggests thr.t the preventacive maintenance progrsn on this valve li include the above provision with periedic clean-up as necessary.

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File No.

DPC, !*et Ed. TPC, API.L. SMUD, TEco or Ref.

- 55 9 SPR-107 -

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Date Ele <:trcactic Relief Valve }L11fuuction July 15, 1975 l

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e Distribution L. C. Rogers E. L. Logan

.J. A. Bailey e

C. E. Mit.chell.

4 R. J. Bakar S.

C. A. Creacy Referecce: 620-0009. SPR-107 "Electronstic Relief Valve Malfunction ** 6 Attached The sets:hed SP2 doc :ssnts a problect'which resulted from corrosion 6f the lever pin, lever hinge and solenoid bracket of the subject valve. -

i Please advice your custoir.er to cenduct periodic inspections for presence of corrosicc products and to perform manual / visual checks for freedou of cocion during plant shutdowns.

C. A. Creacy is reouested to verify with Duke that they intend to cdopt a surveiller.c inspection pregrria on this valve for sll thrses units.

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SITE INSTRUCTION NO.o?[?.Jgt/34._7/!g, R. A. Covers J. D. Phinney 7

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02SCitirl:C'! Or l'RCI.tE:t on Fricar, June 13th, 2.;ka reduced power to 12% FP in pre-l

[J par.iticn to cold shecdo.n for RCP scal replacecont. During the transition fro:s g

c; turbine to turbine bypass the pricary systen experienced a pressure transieut to

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2267 psic. The pcr. cr relief valvo actuated.at 2257 psig and failed to close. 'Ihis l' F.'

, caused the Quench 7:=k rupture disc' to rupture. Failure to promptly close the

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pouer relicf isolatica valve caused viol.st*ons of the fuel compression curve, cooldc.w rates cod T." pu.:ps h*PSU curve. Inspection of the power relief valve after chutdo n indicated that the pilot velve lever had re:nined in the ported position l

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FUR 1iiEF.1.C110!! 'RECG:'IE:GED BY SITE PE350::hEl..

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Sites be advised to concuct periodic inspection / operation of valve to insurc operability. When plant shuts down, perform manual / visual checks for freedosa t

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. The following E:;3-OO is the status and/or resolutiozr of this SPR.on other. contracts.

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For Information CONTRACT NO: 620-do 9 S L

Central Eneineerint Files SPR \\D

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C. C. Plunkett - Cauerset Adrain.

k\\*stk Nalve. S el.

h-S. H. Klein

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The attached. cleared SPR is submitted for your informatico.

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E. L. Logan - FLORIDA

• L. C. Rogers - MET.13.

t R. J.. Baker - TOLEDO r

B. L. Day - Incl. Suppo u i

F. E. Persone - 0F1 Attach' d is one copy of Site Problem Report No. \\N which was processed e

on Contract 620-00 M Future contracts have been reviewed for the s

. potential,of a similar problem. This problem Mis not considered applicable I

to oth'er contracts.

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SITE PROBLEM REPORT BABCOCK & NfLCOI CUSTOMER Oconee III CONTRACT NO. NSS-09 SPR NO.107 REV.NO.

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28 GROUP NO.

41 SEQ. NO.003 MtQ'O RESOL DATE REQ'O CCMP. DATE Er SITE ENGINEER F.C.crisbaua y,,g,f,,,37 e

TITLE ELECTA 0MATIc RELEIT VALVE MALMNCTION

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on criday, June 13th, Duk2 reduced power to 127. FP in pre-l OfSCRIPTION OF PR08 TEM paration to cold shutdown for RCP seal replacement. During the transition from-

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turbine to turbine bypass the primary system experienced a pressure transient to a

2267 psig. The power relief valve actuated at 2257 peig and failed to close. Thia caused the Quench Tank ruptura disc to rupture. Failure to promptly close the f*

power relief isolation valve caused violations of the fuel compression curve,

{

cooldown rates and RC puaps NPSE curve. Inspection of the power relief valve af ter shutdown indicated that the pilot valve lever had remained in the ported position 3

gyn$5,.5hega4n,valgfr9n,,gsgtingdespaing,oQhdever was caused by STATUS - t.Cil0N 10 QATE 'thCLU0thG PE35GNS CCNTACTED JT Janis,NSD, Lynchburg, KR Ellison, NSD, Lynchburg, advised of problem. Yalve has been repaired (6/20/75) and reinstalled. Repair was eff ected by increasing thes clearance for the lever pin in both the solenoid bracker. and the leur.* hinge bearibs k

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FURTHER ACTION RECOMMENDED 8T StT5 PERSONNEL

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Sites be advised to conduct periodic inspection / operation of valve to insure t

operability. When p1 ant shuts down, perform manual / visual checks for freedos 9

of motions.

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1:ss-9 SP".-107

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Date

{e Electremstic Relief L ive Malfunction July 15,1975 gni..

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L. C. Rogers.

E. L. T.ogaa E

'J. A. Mciley' 7

te C. E. Mitchell II y, 3 g,w G

C. A. Creacy' Referencar 620-0009 SPR-107 "Electronatic Relief Valve Malfunction" -

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. Attached e

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The attached S!9. documents a problem which resulted from corrosion of' the n.

lever. pin, Icver hinge and solenoid bracket of the, subject valve.

Please advise your custoccr to conduct.peric'dic ' inspections for presence of corrosion products and to perform manual /risual checks for freedom of n.ocion f

during plant shutdowns.

r C. A. Cresey is requested to verify with' Cake that they intend to Idopt a L

surveillanc'e inspection program on this valve for all three units.

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