ML20008F634

LER 81-019/03L-0:on 810220,plant Operated in Degraded Mode to Repair Pressure Control Valve PV-21243-1.Caused by Excessive Leakage Through 1/2-inch Masoneilan Pressure Control Valve.Valve Stroke Lengthened.Seat & Stem Replaced

ML20008F634
Person / Time
Site:	Fort Saint Vrain
Issue date:	03/19/1981
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20008F631	List: ML20008F630 ML20008F634
References
LER-81-019-03L, LER-81-19-3L, NUDOCS 8104210413
Download: ML20008F634 (1)

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EVENT OESCRIPT;cN AND PeCS ASL" 00'.SECUENCES h I 4 : 1 1 Cn Februa i 20 and Feb ruct i 23, 1981. the oltnt vss enerated at oewer with e arrenev I I

g gi j feedwater to Loep 1 circulator water turbine drives isolated to repair PV-21243-1.

l o ! 41 [ De;;raded toda of LCO 4.2.2.a). Reportable per Fort St. Vrain Technical Soecification 1 1, i s ! t AC 7.5.2(b)2. No effect on public health and safety. Redundant systems available andl 1

Similar occurrences recorted in RO 80-15, I 13 M i ! operable. No accocpanving_o_ccurrence.

I j c ! ; I f 80-23, 80-32. and 80-53.

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:4 25 CAUSE osscRt* TION sNo C;mmECT!vi AtT;0NS h j-l3i l Excessive leakaze through 1/2" Masonoilan oressure control ralve caused eveline of l Valve stroke was lengthened and eventsallv. f 1 i 6 i i 1 A" Bsoneila creuure e- tr'1 e vm

,,,,i; seat and stem were replaced to alleviate excess leakase. pV-21?L3-1 is an air dia-I j . j a t ] phrage activated, carbon steel clobe valve uith an eneratine areasure of 2500 osi.

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