ML20027A353

LER#78-058/03L-0 on 781018:LPCI Suction Valve MO-2-1501-5C Failed to Close During Operability Test.Failure Traced to Valve Stem Not Being Adequately Lubricated.Lubrication Interval Shortened

ML20027A353
Person / Time
Site:	Dresden
Issue date:	11/13/1978
From:	Achterberg J COMMONWEALTH EDISON CO.
To:
Shared Package
ML17173A370	List: ML17173A369 ML20027A353
References
LER-78-058-03L, LER-78-58-3L, NUDOCS 7811210181
Download: ML20027A353 (2)

Text

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7 8 60 58 ooCKET NUV8ER 64 69 EVENT DATE 74 75 RE'oRToATE $3 EVENT DESCRIPTION AND s'ROSABLE CONSEQUENCES h ITTTI I During normal operation, LPCI suction valve MO-2-1501-5C failed to close while per- 1 iTTT1 I forming DOS 1500-1 LPCI system valve operability test. The valve was hand cranked l

[o I. l l off the back-seat and cycled three times satisfactorily. Since the valve is open l l o i s I l during LPCI operation and the LPCI pump operability was notimpaired, safety sig- l lo l6 l l nificance was minimal. This is the first occurrence of this type of failure. l 12 'J l I

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CAUSE DESCRIPTION AND CORRECTIVE ACTICNS h

i j o l l Valve stem was not adequately lubricated. Ifter lubricating g em, the valve was l W ij l successfully cycled three times. The breaker contactors were cleaned and checked and I i,,i,l the torque switch settings were verified bafore the valve was cycled. l i ,131 l Valve lubrication program had the v21re scheduled for lubiication in October, but l j , .i l l valve failed Mfore lubrication was accomp1ished. Lubrication interval shortened (OVER)

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