ML20070W082

Telecopy of RO 83-003:on 830210,initial Disassembly & Insp of PORV RC-RV2 Revealed Pilot Valve Piston & Spring Corroded in Full Open Position.Failure Analysis Initiated to Determine Cause & Corrective Actions

ML20070W082
Person / Time
Site:	Three Mile Island
Issue date:	02/11/1983
From:	Otoole K GENERAL PUBLIC UTILITIES CORP.
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
RO-83-003, RO-83-3, NUDOCS 8302180260
Download: ML20070W082 (1)

Text

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Wnte s Onect Diat Nruer 717-H. E- S002 re bruary 11, 1951 3200-y3-059

' r. Monald C. F.ayner. , Recional .id::inistrator Office of Ins;'arrien and .;f o rce rent

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b.il Fu rk Aver.uc Ung of Prusuia, PA 19 'es Lthj ec t : Licensee Event F.epo r t W.53-003 Octr Mr. !!avnes :

i.e : .yw rating Licencoe DPR-50 Da n.e t 50 *'P9 This telecerv is to .enfirn L: e c.nversatien between Mr. F. Youne , Rc;;1on 1 NRC

.nv '!r M. . Nelson, Suocrviser '. nit i Eeview Prograt., ril-1. at 1115 hours0.0129 days <br />0.31 hours <br />0.00184 weeks <br />4.242575e-4 months <br /> en Fecrt.ary 1 , 1933. 2he event dem.:ti' rec below van declared reportable at 1100 hours.

At 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br /> en 2.O.'C'. ini M -1 disasse. bit and inspection of the Power Operated Erlicf valve O'C- P.Y 2 ) .:as cc 7 e: vel. This inspection was beinP nerformed to con-

-ir ths; the corresion reptr:ed ic the FRC by LER ':c.82-011 onan earlier nodel of this valve was n0 recurring in "!T-l's Extended cold shutdown environment. Th.15 i t: spec tie:: has ider:tified .ha . cerrosten has occurred in the incencl and cartentd tic r,asi aarts in the .rresently :nstalled valve. Furtherr. ore, althounh the main vc.1vc tisc was found ir, thu cold pnsitinn, the pilet valve piston and sorint were fcund ccrroded in the full coen nosition. Tne corroded condition of this valve is considered to require renedial action er corrective measures te prevent potential r..alfunction of

'Lis valve, and ix .onsidered in he reportable within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> in accordance .with

~e::hnical Spec i f i er.t ien 6. 9. 2.i . 9. Ihis was determined to be repertable nt 1100 hours0.0127 days <br />0.306 hours <br />0.00182 weeks <br />4.1855e-4 months <br /> or February 11, 198 3 by T"T-1 Pl n r.t Review r;roup.

Faliure analysis of the ccrreded parts is beint. intiated to dercrmine the cause and atprepriate corrective actions necessnry tc assure future valve onerabilitv.

Tree details of this occurrence and the ccrrective actions to prevent its recurrence vili 'ce provided within l' day?t.

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