05000280/LER-1980-054-03, /03L-0:on 800815,during Periodic Testing,Motor Operated Valve SW-102B Failed to Cycle.Valve Required to Close on Loss of Offsite Power Coincident W/Loss of Coolant. Caused by Previous Exposure of Motor Windings to Water

/03L-0:on 800815,during Periodic Testing,Motor Operated Valve SW-102B Failed to Cycle.Valve Required to Close on Loss of Offsite Power Coincident W/Loss of Coolant. Caused by Previous Exposure of Motor Windings to Water

ML18139A510
Person / Time
Site:	Surry
Issue date:	09/12/1980
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139A508	List: 05000280/LER-1980-051-03, /03L-0:on 800813,discharge Tunnel Radiation Monitor Found Out of Svc During Release of Liquid Waste Test Tank A.Caused by Defective Circuit Card.Replaced Defective Card 05000280/LER-1980-054-03, /03L-0:on 800815,during Periodic Testing,Motor Operated Valve SW-102B Failed to Cycle.Valve Required to Close on Loss of Offsite Power Coincident W/Loss of Coolant. Caused by Previous Exposure of Motor Windings to Water ML18139A507
References
LER-80-054-03L-01, LER-80-54-3L-1, NUDOCS 8009220260
Download: ML18139A510 (2)

LER-1980-054, /03L-0:on 800815,during Periodic Testing,Motor Operated Valve SW-102B Failed to Cycle.Valve Required to Close on Loss of Offsite Power Coincident W/Loss of Coolant. Caused by Previous Exposure of Motor Windings to Water

Event date:
Report date:
2801980054R03 - NRC Website

text

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I While performing Periodic Test 25.1 the motor operated valve SW-102B failed to cycle.

This valve is required to close on a loss of offsite power coincident with a loss of coolant accident.

An operator was assigned to manually close the valve if the need arose.

The health and safety of the public were not affected *.

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ATTACHMENT I (PAGE 1 OF 1)

SURRY POWER STATION, UNIT 1 DOCKET NO:

50-280 REPORT NO:

80-054/03L-0 EVENT DATE:

08-15-80 TITLE OF REPORT:

MOV-SH-102B MALFUNCTION

1.

DESCRIPTION OF EVENT

• while performing Periodic Test 25.1 the motor operated valve, MOV-SW-102B, SW to CC Heat Exchangers, did not cycle.

The motor overload was found to have operated.

This valve protects us from violating T.S. 3.14 and is reportable under T.S. 6.6_.2.b. (2).

2.

PROBABLE CONSEQUENCES AND STATUS OF REDUNDANT SYSTEMS:

This valve is required to close to insure sufficient quantity of water in the intake canal for RS operation.

However, ari operator was assigned to close this valve if it became necessary.

The health and safety of the public were not affected.

3.

CAUSE

The motor windings were degraded as a result of previous exposure to water.

4.

IMMEDIATE CORRECTIVE ACTION

An operator was assigned to close the valve if it became necessary.

5.

SUBSEQUENT CORRECTIVE ACTION:

The motor was replaced and the valve cycled normally.

6.

ACTION TAKEN TO PREVENT RECURRENCE:

None deemed necessary.

7.

GENERIC IMPLICATIONS:

None.