05000280/LER-1980-024-03, /03L-0:on 800828,w/unit in Intermediate Shutdown, Inside Trip Valve TV-SS-200A Would Not Close & Remain Closed When Control Switch Was Released.Caused by Failure of Close Limit Switch.Limit Switch Replaced

/03L-0:on 800828,w/unit in Intermediate Shutdown, Inside Trip Valve TV-SS-200A Would Not Close & Remain Closed When Control Switch Was Released.Caused by Failure of Close Limit Switch.Limit Switch Replaced

ML18139A555
Person / Time
Site:	Surry
Issue date:	09/26/1980
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139A553	List: 05000280/LER-1980-024-03, /03L-0:on 800828,w/unit in Intermediate Shutdown, Inside Trip Valve TV-SS-200A Would Not Close & Remain Closed When Control Switch Was Released.Caused by Failure of Close Limit Switch.Limit Switch Replaced
References
LER-80-024-03L-02, LER-80-24-3L-2, NUDOCS 8010010586
Download: ML18139A555 (2)

LER-1980-024, /03L-0:on 800828,w/unit in Intermediate Shutdown, Inside Trip Valve TV-SS-200A Would Not Close & Remain Closed When Control Switch Was Released.Caused by Failure of Close Limit Switch.Limit Switch Replaced

Event date:
Report date:
2801980024R03 - NRC Website

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I With the unit at intermediate shutdown it was found that TV-SS-200B would not stay III) !closed.This. is contrary to T.S.-3.8.A.l and is reportable per T.S.-6.6.2.b.(2)., The inside trip valve, TV-SS-200A, was operable and would have closed if needed for

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ATTACHMENT 1 SURRY POWER DOCKET NO:

REPORT NO:

EVENT DATE:

e STATION, UNIT 2 50-281 80-024/03L-0 08-28-80 TITLE OF REPORT:

TRIP VALVE TV-SS-200B FAILURE

1.

Description of Event

e With the unit at. intermediate shutdown it was found that TV-SS-200B would not close and remain closed when the control switch was releas*ed.

This is contrary to T.S.-3.8.A.l and is reportable per T.S.-6.6.2.b(2).

2.

Probable Consequences:

If isolation of this line had been required, the inside trip valve (TV-SS-200A) would have closed.

Containment integrity would therefore have been maintained and the health and safety of the general public were not affected.

3.

Cause

The valve would not remain closed because the close limit switch had failed.

4.

Immediate Corrective Action

The immediate corrective action was to close the inside trip valve and have the manual isolation valve closed.

5.

Subsequent Corrective Action:

The Electricians subsequently replaced the limit switch and returned the valve to operable status.

6.

Future Corrective Action:

None

7.

Generic Implications:

None