05000281/LER-1980-003-03, MOV-CW-200B Found Inoperable.Caused by Electrical Malfunction Due to Mechanical Repair in Progress.Redundant Water Box Inlet Valve MOV-CW-206B Was Shut

MOV-CW-200B Found Inoperable.Caused by Electrical Malfunction Due to Mechanical Repair in Progress.Redundant Water Box Inlet Valve MOV-CW-206B Was Shut

ML18139B007
Person / Time
Site:	Surry
Issue date:	01/15/1981
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139B006	List: 05000281/LER-1980-003, Forwards Updated LER 80-003/03L-1 & LER 80-046/03L-0 05000281/LER-1980-003-03, MOV-CW-200B Found Inoperable.Caused by Electrical Malfunction Due to Mechanical Repair in Progress.Redundant Water Box Inlet Valve MOV-CW-206B Was Shut 05000281/LER-1980-046-03, /03L-0:on 801217,breaker Feeding MOV-CW-200C Found Open.Caused by Coat Hung on Operating Arm of Circuit Breaker.Coat Removed
References
LER-80-003-03L, LER-80-3-3L, NUDOCS 8101200335
Download: ML18139B007 (2)

LER-1980-003, MOV-CW-200B Found Inoperable.Caused by Electrical Malfunction Due to Mechanical Repair in Progress.Redundant Water Box Inlet Valve MOV-CW-206B Was Shut

Event date:
Report date:
2811980003R03 - NRC Website

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EVENT DATE 74 75 REPORT DATE 80 TI] !With the unit at cold shutdown, MOV-CW-200B was found inoperable.

The failure of the

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-"Updated Report-Previous Repor~ate-6-06-80 11 ATTACHMENT, PAGE 1 OF 1 SURRY POWER STATION, UNIT 2 DOCKET NO:

50-281 REPORT NO:

80-003/03L-1 EVENT DATE:

5-14-80 TITLE OF EVENT:

MOV-CW-200B INOPERATIVE

1.

DESCRIPTION OF EVENT

With the unit at cold shutdown, MOV-CW-200B was under mechanical repair to adjust the limitorque.

While in this condition, an attempt was made to close the valve electrically. MOV-CW-200B would not operate electrically.

This event is non-conservative with respect to T.S. 3.14.A.l and reportable per Technical Specification 6.6.2.b.2.

2.

PROBABLE CONSEQUENCES OF EVENT:

The inoperability of MOV-CW-200B had no effect upon the health or safety of the general public because the intake canal level was controlled by closing water box inlet valve (MOV-CW-206B).

The automatic safety related function of the redundant valve was operable.

3.

CAUSE OF EVENT

While MOV-CW-200B was under repair to adjust the limitorque, it was found not to cycle electrically.

When mechanical adjustments were near completion, the valve was checked electrically and found to cycle correctly.

The electrical malfunction of MOV-CW-200B was attributed to the mechanical repair in progress.

4.

IMMEDIATE CORRECTIVE ACTIONS

The immediate corrective action was to shut the water box inlet valve MOV-CW-206B.

5.

SCHEDULED COR~C'.ITVE ACTION:

The scheduled corrective action was to complete the mechanical repair and verify electrical operability of the circulating water valve.

6.

ACTION TAKEN TO PREVENT RECURRENCE:

None.

7.

GENERIC IMPLICATIONS:

None.