ML18139A755

LER 80-025/03L-0:on 801003,w/Unit 2 at 100% Power,Periodic Test 27D Revealed That Amperage for Circuit 2A Panel 10 Was Below Acceptance Criteria.Caused by Damaged Heat Tracing Tape.Verified That Redundant Circuit Was Operable

ML18139A755
Person / Time
Site:	Surry
Issue date:	10/16/1980
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139A602	List: ML18139A601 ML18139A603 ML18139A604 ML18139A754 ML18139A755
References
LER-80-025-03L-03, LER-80-25-3L-3, NUDOCS 8010200524
Download: ML18139A755 (2)

Text

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2J2J I With Unit #2 at 100% power, Periodic Test 27D revealed that the amperage for Circuit 2A Panel 10 (Unit 112 BIT inlet line and valves MOV-2867 A & B) was below the Accept-ance Criteria stipulated in the .PT. The redundant Heat Tracing Circuit was operable. This is a degraded mode of operation as specified in T. S. 3. 3. B. 5 and is report ab le in accordance with T.S.6.6.2.b(2).

The health and safety of the public were not affected.

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of scaffolding to s_upport IILechanicall work in the nearby area. The defective Heat Tracing Tap~ was replaced and verified TIIJ .1-_o_p_e_r_a_b_l_e_.

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• e e ATTACHMENT 1 SURRY POWER STATION, UNIT 2 DOCKET NO: 50-281 REPORT NO: 80-025/03L-O EVENT DATE: 10-03-80 TITLE OF REPORT: HEAT TRACING FAILURE 1. Description of Event: With Unit 2 at 100% power, Pe.riodic T.est 27D revealed that the amp readings for circuit 2A Panel.10 (Unit #2 BIT inlet line and valv.es) were below the Acceptance Criteria stipulated in the PT. This is a degraded mode of operation as specified in T.S.3.3.B.5 and is portable in accordance with T.S.6.6.2.b(2).

2. Prob ab le Consequences

& Status of Redundant Systems: 3. 4. The Heat Tracing is intended to ,maintain a temperature above that needed for flow. The redundant Heat Tracing Circuit was operable, therefore, the.health and safety of the public were not affected.

Cause: The *Heat Tracing Tape was damaged during . .erection of scaffolding to support* mechanical work in the nearby area. Immediate Corrective Action: The immediate corrective action was to verify that the redundant circuit was operable.

5. Subsequent Corrective Action: The defective Heat Tracing Circuit was replaced within the time span specified by the Technical Specifications.

6. Action Taken to Prevent Recurrence:

No additional

• actions are deemed necessary.

7. Generic Implications:

The task force has reviewed the total. spectrum of the Heat Tracing sys tern and a Design Change is being prepared as a .result of the Task Force Study. Long lead items are b.eing procured . I J