ML20024B436

Ro:On 750613,during Pressure Transient,Porv Actuated & Failed to Close,Resulting in Rupture of Quench Tank Rupture Disc.Caused by Corrosion of Lever Pin,Lever Hinge & Solenoid Bracket.Valve Repaired

ML20024B436
Person / Time
Site:	Oconee, Three Mile Island
Issue date:	12/01/1976
From:	Burnley R, Creacy C, Klein S BABCOCK & WILCOX CO.
To:
Shared Package
ML20024B434	List: ML20024B433 ML20024B436
References
TASK-03, TASK-3, TASK-GB GPU-2512, NUDOCS 8307080724
Download: ML20024B436 (5)

Text

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w SITE PROBLEM REPORT BABCOCK L IlLCDI_ [

CONTRACT NO. Nss-c9 $PR NO.107 REY.NO.

CUSTCutR oconee III P.O. NO. 20158Ls TASR NQ. 28 CROUP NO. 41 SEO.NO.003 VENDOR Dresser M50L DAIE am GmP. 0 AIE y SITE ENGINEER T.C.Crisbaus For info ontv Ilb EI.ECTRCMATIC RELEIT VALVE MALT 1.3CTION CESCRIPi!QN OF PROBLEg on Friday, June iJth Duke reduced power to 12: FP in pre-paration to cold shutdown for RCP seal replacement. During the transition from e turW to turbine bypass the primary system experienced a pressure transient to ~

226l psia.. The power relief valve actuated at 2257 psig and f ailed to close. This causeithe Quench Tank rupture disc to rupture. Failure to promptly close the L power relief isolation valve caused violations of the fuel compression curve,  ;

cooldown rates and RC ptmps hPSP. curve. Inspection of the power relief vs1ve afte r '.

shutdown indicated that the pilot valve lever had remained in the ported position I MMN8.}hgagive,f fg,,resyting.13estrainho{the lever was caused by e

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$lAluS . ACilCN 10 QAIE ]NCLU0 LNG PERSGNS CCNIACIED JT J.nis.NSD, Lynchburg, KA Ellison, NSD, Lynchburg, advised of problem. Valve [r has been repaired (6/20/75) and reinstalled. Repair was effected by increasing the ng clear

~,,..ance for the lever

,41n, n.,pin,.A in both

.n. the s!len.oid vere re ir*f ebracket ce m . Wand eve the ci *lever hinge beari r **'*f"-

.. n t y, t FURTHER ACilCN RECCHENDEO ST SITE PERSONNEL '

sites be advised to conduct periodic inspection / operation of valve to insure i operability. When plant shuts devn, perform manual / visual checks for freedom I

of motions.

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. RE50LuIiCN see further action. V y 5tf.5~e J7tdC T!0 H 5~559/O JYM'5MG $kMfC27041 lO 0fW Nodafos Moon Osce4ted $1 Cr?ft Strff. h l APPROVE 0 ST _ % s$lGNATURE DATE [

g N.S. SUPPC4T ENGIstra (NYhkN %dfb i

5 IASK ENGINEER N.S. UNIT WANAGEs V i bt.L,. . A /s.N r l

N Fii.ST Rt.UP GSERV. & MINT. WG. h iN D T' ah6 /W '

l Y i PROJECT 4ANAGER / ChiRACT ENGihEER C. 42 Cwp 7 21-75 g

COST CATEGORf O NCsu OC 03 OG C Ot O VENDCR CLAlu F b

AUTM. CHARGE NO. lOFIELDCHANGEREO l5CNO.

SiiE CCMPLEllCN REPORT fy , go //J ka .shs2//[/[ h 5 -

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{ DEVIATICNS 3 ATE CCWPt[TED t' O NONE O SEE SPR REV. NO.

.*/ Nml SIGNED Bf m e . ..e

' ' ' " ' ' ' L l0 ATE / ' '..7-S.Q.u..CCNST. REP. APPROYAL - s

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I 8307080724 75071s a 2 4 5) gDRADOCK 05000289 HOL

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INSTRUCTIONS FOR PDS-21091 - SITE PKOBLCi RIPORT t,

Initiated by EW Construction or NPCD Nuclear Service .j

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(1) Originator - Fill in: Customet;, Contract Number; Vendor; Purchase Order

• I Nu=ber; Task Nu=Eer;" Croup Number; Sequence Number; Name; Title; Description oIProblem; Status; Furtheir Action Recornended by Site Personnel; Originator Signature and Date; Vendor Claim (NPCD only - if applicable) 3 (2) Senior BW Construction - Fill in: SPR Nu=ber; Revision Nu=ber; Reg'd. Resol.

Co. Site Representative Date; Req'd. Coep. Date; Approval Signature; or Site Operations Date.

Manager ,

(3) Nuclear Service Support Engineer - Fill in: Cost Category; Authorized Charge

• Number. i

1. (4) Nuclear Service t' nit Manager - Fill in: Resolution; FC Req. and FC Number; and/or Task Engineer Signature and Date.

(5) Plant Start-up Section - Approve Resolution; Signature; Date.

Manager or Service and Maintenance Unit Manager (6) Project Manager or - Verify Charge Nu=ber; Approve Resolution; Signature and i

Contract Engineer Date.

~ ~ (7) Senior B&W Construction - Implement resolution; upon completion, fill in:

Co. Site Representative Completion Report: Date Completed and Signature.

or Field Engineer (8) Site Operations Manager - Approve completion; sign.

or Senior 3&*J Construction Co. Site Representative

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'O RH.AT G CPRs -

This SPR has been reviewed by Task Ingineering Croup: at.d is applicable to

. N: 3- O6 . The following  ;

f is the status ard/or resolution of this SPR on other contra' cts, d^

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SITE PJtosLcf RIPCRT TRA.N5MITTAL q:

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.. TILZ: 12M2 q To For Infor:sation CCNT1 TACT No 620-do 4 %

Central Enrineering Files SFR \D ,

C. C. Flunket t - Contract Admin.

TITLE % b d k

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- ' S. H. Klein - Quality As s uran c e '

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VA hM - Task Engineer DATE: \\ * *2.d=9 %

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- Project Manager ,

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The attached. . cleared SPA is s af tted for your information. ..

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. 'TO: E. L. Lo5an: - TLORIDA rJ.

. L. C. Rogers - ET.D.

L J. Baker - TCLEDO 3 '.'

B. L. Day - Intl. Suppare ,

.F. E. Perrone - CTI ' - ,

el f Attached is one copy of Site Prrblem Report No. N1 which *was processed '

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on Contract 620-00 @ . Future contracts h' ave been. re' vie.wed for. the ._

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potential of a similar problem. This problem Mis not considered applicable l to other contracts

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C. M. Jacks - Plant Integration

• C88 NUCLEAR SERVICE SL;PPORT E.NGI'iEER s This SPR has bee.n reviewed I.W NPC-1707-01 -

CLEARED .

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