ML20010G898

LER 81-039/03L-0:on 810815,accumulator a Level Dropped Due to Inadvertent Opening of Drain Valve HCV-1852A Instead of Fill Isolation Valve HCV-1851A.Caused by Operator Error. Operator Reinstructed in Proper Procedures

ML20010G898
Person / Time
Site:	Surry
Issue date:	09/03/1981
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010G880	List: 05000280/LER-1981-039-03, /03L-0:on 810815,accumulator a Level Dropped Due to Inadvertent Opening of Drain Valve HCV-1852A Instead of Fill Isolation Valve HCV-1851A.Caused by Operator Error. Operator Reinstructed in Proper Procedures 05000280/LER-1981-041-03, /03L-0:on 810820,PT-27D Revealed That Amp Readings for Heat Tracing Panel 9 Circuit 7A Were Below Acceptance Criteria.Caused by Inadvertent Cutting of Heat Tracing Tape During Cleanup Operations on Boric Acid Flat ML20010G879
References
LER-81-039-03L-03, LER-81-39-3L-3, NUDOCS 8109220639
Download: ML20010G898 (2)

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ATTACHMENT 1 SURRY-POWER RTATION, UNIT 1 DOCKET NO: 50-280 REPORT NO: 81-039/03L-0 EVENT DATE: 8/15/$1 TITLE OF THE EVENT: "A" ACCUMULATOR LOW LEVEL

1. DESCRIPTION OF EVENT:

With the unit at 100% power, operating personnel were starting to fill "A"'

accumulator tank when drain valve HCV-1852A was inadvertently opened instead of HCV-1851A (fill isolation valve). "A" accumulator level dropped to'444 within seconds. Immediate steps were taken to stop the drainage and refill-the accumulator. The "/" accumulater level was below the Technical Specifi-cations requirements outlined in 3.3.A.2 for a period of 15 minutes. This event is reportable in accordance with Technical. Specification 6.6.2.b.(2).

2. PROBABLE CONSEQUENCES AND STATUS OF REDUNDANT SYSTEMS:

The redundant accumulators were available; therefore, the health and safety of the public were not affected.

3. CAUSE:

The event was caused by improper valve manipulati on: by operational personnel.

4. IMMEDIATE CORRECTIV.E ACTION:

HCV-1852A was closed to prevent further decrease in level.

5. SUBSEQUENT CORRECTIVE ACTION:

HCV-1851A was opened to restore tank level.

6. ACTIONS TAKEN TO PREVENT RECURRE!;CE:

The operator involved was reinstructed-in the fill procedure for accumulat rs.

7. CENERIC IMPLICATIONS:

None.