05000280/LER-1980-069-03, /03L-0:on 801022,PT-27D Revealed Low Amp Reading for Panel 8,circuit 13A (Boron Injection Recirculation to Boric Acid Tanks).Caused by Excessive Heat.Failed Heat Tape Replaced

/03L-0:on 801022,PT-27D Revealed Low Amp Reading for Panel 8,circuit 13A (Boron Injection Recirculation to Boric Acid Tanks).Caused by Excessive Heat.Failed Heat Tape Replaced

ML18139A854
Person / Time
Site:	Surry
Issue date:	11/20/1980
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139A853	List: 05000280/LER-1980-069, Forwards LER 80-069/03L-0 05000280/LER-1980-069-03, /03L-0:on 801022,PT-27D Revealed Low Amp Reading for Panel 8,circuit 13A (Boron Injection Recirculation to Boric Acid Tanks).Caused by Excessive Heat.Failed Heat Tape Replaced
References
LER-80-069-03L-02, LER-80-69-3L-2, NUDOCS 8011250372
Download: ML18139A854 (2)

LER-1980-069, /03L-0:on 801022,PT-27D Revealed Low Amp Reading for Panel 8,circuit 13A (Boron Injection Recirculation to Boric Acid Tanks).Caused by Excessive Heat.Failed Heat Tape Replaced

Event date:
Report date:
2801980069R03 - NRC Website

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!With Unit #1 defueled and Unit #2 at 100% power, PT-27D revealed low amp reading for EJ:I] !Panel #8, Circuit 13A (Boron Injection Recirc to the Boric Acid Tanks).

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1a degraded mode of operation as specified in T.S. 3.3.B.5 and is reportable in accordance!

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1with T.S. 6.6.2.b.(2). Recirculation flow from the Boron Injection Tank was verified;

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

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II[] !The heat tracing failed because of excessive heat.

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The failed tape was

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e ATTACHMENT 1 SURRY POWER STATION, UNITS 1 DOCKET NO: 50-280 REPORT NO: 80-069/03L-0 EVENT DATE:

10/22/80 TITLE OF REPORT:

HEAT TRACING FAILURE

1.

DESCRIPTION OF EVENT

2.

With Unit #1 defueled and Unit #2 at 100% power, PT-27D revelaed that the amp readings for Panel #9, Circuit 13A (Boron Injection Recirc to the Boric Acid Tanks) Panel #8 was below the acceptance criteria stipulated in the PT.

This event is a degraded mode of operation as specified in T.S. 3.3.B.5 and is reportable in accordance with T.S. 6.6.2.b.(2).

PROBABLE CONSEQUENCES AND STATUS OF REDUNDANT SYSTEMS:

The Heat Tracing is intended to maintain a temperature above that required to maintain Boric Acid in solution.

The redundant Heat Tracing Circuit (Panel #9, Circuit 13A) was operable, therefore the health and safety of the public were not affected.

3.

CAUSE

The Heat Tracing tape failed due to excessive heat.

4.

IMMEDIATE CORRECTIVE ACTION

5.

The imm.ediate corrective action was to verify that the r'edundant circuit was operable.

SUBSEQUENT CORRECTIVE ACTION:

The defective Heat Tracing tape was replaced.

The circuit was tested satisfac-torily within the time span specified by the Technical Specifications (~4 hours).

6.

ACTION TAKEN TO PREVENT RECURRENCE:

No additional actions deemed necessary.

7.

GENERIC IMPLICATIONS A task force has reviewed the total spectrum of the Heat Tracing System and a Design Change is being prepared.