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

/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

ML20010G890
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-81-041-03L-02, LER-81-41-3L-2, NUDOCS 8109220630
Download: ML20010G890 (2)

LER-1981-041, /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

Event date:
Report date:
2801981041R03 - NRC Website

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With Unit No. 1 at 100% power, PT-27D revealed that amp readings for heat tracing

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Panel, 9, circuit 7A were below the acceptance criteria stipulated in the PT.

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event is contrary to T.S.3.3.B.5 and is reportable per T.S.6.6.2.b('.:). The redundantj

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heat tracing circuit was operable; therefore, the health and safety of the public 1

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CAuSE DESCRIPTICN AND CORRECT 3VE ACTICNS l2 1oll The loss of heat tracinn was apparentiv due to an inadvertent cuttinc of the heat I

tie 3 l 1 tracing tape during clean up operations on the Boric Acid Flat. The defective heat i

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tracing was replaced and tested.

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ATTACHMENT 1 SURRY POWER STATION, UNIT NO.1 DOCKET NO:

50-280 REPORT NO:

81-041/03L-0 EVENT DATE:

08-20-81 TITLE OF THE EVENT:

IIEAT TRACING FAILURE 1.

DESCRIPTION OF EVENT

With Unit No. 1 at 100% power, PT-27 revealed that the amp readings for heat tracing panel 9, circuit 7A (Heat Tracing for Unit #1 boric acid filter outlet to blender) were below the acceptance criteria stipulated in the PT..This event is contrary to Technical Specification 3.3.B.5, and is reportable per Technical Specification 6.6.2.b(2).

2.

PROBABLE CON QUENCES AND STATUS OF REDUNDANT EQUIPMENT:

The heat tracing circuits are intended to maintain a fluid temperature above that needed for flow. The redundant heat tracing circuit was cperable; therefore, the health and safety of the public were not af fected.

3.

CAUSE

The loss of heat tracing tape was apparently due to the inadvertent cutting of -

the heat tracing tape during a clean-up operation.

4.

E4 MEDIATE CORRECTIVE ACTION:

The immediate corrective action was to verify that the redundant circuit was operable.

5.

SUBSEQUENT CORRECTIVE ACTION:

The defective heat tracing tape was replaced and tested within the time span specified by Technical Specifications.

6.

ACTION TAKEN TO PREVENT RECURRENCE:

Technicians assigned to clean up and decontamination responsibilities have been instructed to use caution when performing cleaning operations in the vicinity of safety related systems.

7.

GENERIC IMPLICATIONS:

None.