05000281/LER-1983-045-03, /03L-0:on 831008,w/unit Operating at 100% Power, Breaker for Valve MOV-2867D Found Open,Rendering Valve Inoperable.Caused by Accidental Bump While Opening Nearby Fire Door.Breaker Reclosed

/03L-0:on 831008,w/unit Operating at 100% Power, Breaker for Valve MOV-2867D Found Open,Rendering Valve Inoperable.Caused by Accidental Bump While Opening Nearby Fire Door.Breaker Reclosed

ML20132D180
Person / Time
Site:	Surry
Issue date:	11/03/1983
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20132D141	List: 05000281/LER-1983-045-03, /03L-0:on 831008,w/unit Operating at 100% Power, Breaker for Valve MOV-2867D Found Open,Rendering Valve Inoperable.Caused by Accidental Bump While Opening Nearby Fire Door.Breaker Reclosed 05000281/LER-1983-046-03, /03L-0:on 831004,valve MOV-R5-255A Became Inoperable When Valve Operator Support Broke Loose from Floor Mounting During Attempt to Cycle Valve.Caused by Using Bolts W/Insufficient Strength to Attach Stand to Floor ML20132D137
References
LER-83-045-03L, LER-83-45-3L, NUDOCS 8507310238
Download: ML20132D180 (2)

LER-1983-045, /03L-0:on 831008,w/unit Operating at 100% Power, Breaker for Valve MOV-2867D Found Open,Rendering Valve Inoperable.Caused by Accidental Bump While Opening Nearby Fire Door.Breaker Reclosed

Event date:
Report date:
2811983045R03 - NRC Website

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I ATTACHMENT 1 SURRY POWER STATION, UNIT NO. 2 r

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50-281 REPORT NO:

83-045/03L-0 EVENT DATE:

10-08-83 ITITLE OF THE EVENT: MOV-2876D FOUND DE-ENERGIZED 1.

Description of the Event With the unit at 100% power, a routine walkdown of the control board revealed the' circuit breaker for MOV-2876D (Boron Injection Tank Outlet) to be open. This breaker had been verified closed 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> earlier while performing the control board indicating light walk-down. The redundant flow path was checked to ensure it was energized. This event is contrary to T.S.

3.3.A.7 and reportable in accordance with T.S.6.6.2.b.(2).

2.

Probable Consequences and Status of Redundant Equipment Upon receipt of a safety injection signal, the BIT valves are automatically opened and the BIT contents are pumped into the RCS by the High Head Safety Injection Pumps. The redundant BIT flow path, MOV-2867C, was operable through-out this event; therefore, the health and safety of the public were not affected.

3.

Cause

The breaker is located near sliding fire door #18. While attempting to open and transit through the fire door, it is likely that the breaker was accid,entally bumped, causing it to open.

4.

Immediate Corrective Action

The breaker was closed and the valve responded properly.

5.

Subsequent Corrective Action None required.

6.

Action Taken to Prevent Recurrence The feasibility of providing some form of a barrier to prevent recurrence is being evaluated.

7.

Generie Implications Other similar events have occured during periods of extensive design change activity.