05000281/LER-1980-030-03, /03L-0:on 801013,at 100% power,PT-27B Indicated Low Amp Reading on Circuit 6A,boric Acid to Blender Panel 10.Caused by Heat Tracing Failure Due to Mechanical Damage Sustained from Erecting Scaffolding

/03L-0:on 801013,at 100% power,PT-27B Indicated Low Amp Reading on Circuit 6A,boric Acid to Blender Panel 10.Caused by Heat Tracing Failure Due to Mechanical Damage Sustained from Erecting Scaffolding

ML18139A809
Person / Time
Site:	Surry
Issue date:	10/04/1980
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139A808	List: 05000281/LER-1980-030, Forwards LER 80-030/03L-0 05000281/LER-1980-030-03, /03L-0:on 801013,at 100% power,PT-27B Indicated Low Amp Reading on Circuit 6A,boric Acid to Blender Panel 10.Caused by Heat Tracing Failure Due to Mechanical Damage Sustained from Erecting Scaffolding
References
LER-80-030-03L-02, LER-80-30-3L-2, NUDOCS 8011100505
Download: ML18139A809 (2)

LER-1980-030, /03L-0:on 801013,at 100% power,PT-27B Indicated Low Amp Reading on Circuit 6A,boric Acid to Blender Panel 10.Caused by Heat Tracing Failure Due to Mechanical Damage Sustained from Erecting Scaffolding

Event date:
Report date:
2811980030R03 - NRC Website

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/ With the unit at 100% power, PT-27B indicated a low amp reading on cjrcujt 6A ' boric C£::IfJ acid to the blender, panel 10.

This event is contrary to T.S.-3.2.B.5 and is

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The redundant circuit of heat tape was operating,

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therefore the health and safety of the public were not affected..

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ATTACHMENT 1 SURRY POWER DOCKET NO:

REPORT NO:

EVENT DATE:

e STATION, UNIT 2 50-281 80-030/031-0 10-13-80 TITLE OF REPORT:

HEAT TRACING SYSTEM FAILURE

1.

Description of Event

e With the unit at 100% power, PT-27B indicated a low amp reading on circuit 6A o.n panel 10, boric acid to the blender.

This event is contrary to T.S.-3.2.B.5 and is reportable per T.S.-6.6.2.b(2).

2.

Probable Consequences of Occurrence:

The heat tracing system is designed to maintain the boric acid at a temperature above which solidification could occur.

The redundant circuit of heat tracing was functioning, therefore the health and safety of the public were not affected.

3.

Cause of Occurrence:

The heat tracing failed due to mechanical damage sustained from individuals in the area.

Erecting scaffolding to accomodate installation of pipe supports.

4.

Immediate Corrective Action

The immediate corrective action was to verify redundant circuit operable.

5.

Subsequent Corrective Action:

The subsequent corrective action was, to replace the affected heat tape and prove operability.

6.

Actions Taken to Prevent Recurrence:

Construction personnel have been formally advised on the importance of safety related heat tracing and the dire consequences associated with damaging it.

In addition, a person has been assigned to provide interface between the station staff and construction personnel to aid them in avoiding problems of this nature.

7.

Generic Implications:

None