05000237/LER-1978-063-03, /03L-0 on 781123:MSIV 2-203-1A Closed in 5.6 Seconds & MSIV 2-203-1C in 2 Seconds After Initiation Signal,Caused by MSIV 2-203-1A & MSIV 2-203-1C Valve Timing Out of Adjustment

/03L-0 on 781123:MSIV 2-203-1A Closed in 5.6 Seconds & MSIV 2-203-1C in 2 Seconds After Initiation Signal,Caused by MSIV 2-203-1A & MSIV 2-203-1C Valve Timing Out of Adjustment

ML20027A562
Person / Time
Site:	Dresden
Issue date:	12/19/1978
From:	Achterberg J COMMONWEALTH EDISON CO.
To:
Shared Package
ML17173A443	List: 05000237/LER-1978-063, Forwards LER 78-063/03L-0 05000237/LER-1978-063-03, /03L-0 on 781123:MSIV 2-203-1A Closed in 5.6 Seconds & MSIV 2-203-1C in 2 Seconds After Initiation Signal,Caused by MSIV 2-203-1A & MSIV 2-203-1C Valve Timing Out of Adjustment
References
LER-78-063-03L, LER-78-63-3L, NUDOCS 7812270271
Download: ML20027A562 (2)

LER-1978-063, /03L-0 on 781123:MSIV 2-203-1A Closed in 5.6 Seconds & MSIV 2-203-1C in 2 Seconds After Initiation Signal,Caused by MSIV 2-203-1A & MSIV 2-203-1C Valve Timing Out of Adjustment

Event date:
Report date:
2371978063R03 - NRC Website

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i o i i l During normal surveillance testing of MSIV closure time, MSIV 2-203-1A closed in i

90,3; l5.6 seconds and MSIV 2-203-1C closed in 2.8 seconds after the initiation signal, which;

g,.; j did not meet T.S. Table 3.7.D.2 limits of 3 </= T </=5 sec. Event was of minimal l

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]i historical closing times for MSIV's indicates that minimal time variations occur I

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