05000280/LER-1980-057-03, /03L-0:on 800818,at 89% Power,Periodic Test 27D Revealed Low Amperage Reading for Circuit 13A Boron Injection Recirculation to Boric Acid Tanks,Panel 9.Caused by Failure of Heat Tracing Tape.Design Change Initiated

/03L-0:on 800818,at 89% Power,Periodic Test 27D Revealed Low Amperage Reading for Circuit 13A Boron Injection Recirculation to Boric Acid Tanks,Panel 9.Caused by Failure of Heat Tracing Tape.Design Change Initiated

ML18139A523
Person / Time
Site:	Surry
Issue date:	09/17/1980
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139A521	List: 05000280/LER-1980-056-03, /03L-0:on 800818,at 89% Power,Periodic Test 27D Revealed Low Amperage for Circuit 7,panel 8.Caused by Damage to Heat Tracing Tape During Mechanical Work Nearby. Defective Tape Replaced & Verified Operable 05000280/LER-1980-057-03, /03L-0:on 800818,at 89% Power,Periodic Test 27D Revealed Low Amperage Reading for Circuit 13A Boron Injection Recirculation to Boric Acid Tanks,Panel 9.Caused by Failure of Heat Tracing Tape.Design Change Initiated ML18139A520
References
LER-80-057-03L-01, LER-80-57-3L-1, NUDOCS 8009230673
Download: ML18139A523 (2)

LER-1980-057, /03L-0:on 800818,at 89% Power,Periodic Test 27D Revealed Low Amperage Reading for Circuit 13A Boron Injection Recirculation to Boric Acid Tanks,Panel 9.Caused by Failure of Heat Tracing Tape.Design Change Initiated

Event date:
Report date:
2801980057R03 - NRC Website

text

i /I LICENSEE EVE~H REPORT

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VENT u'-TE 74 75 REPORT DATE 80

• EVENT D:C:5CRIPTION AND PROBABLE CONSEQUENCES@

.~IIJ I With Unit ifl at 89% power PT-27D revealed that the a.rn"-Lt-P'--'r....,,e...,a""'du..i.... *uu,sg__._f.... o,~r__._c_i._r._c._1..... 1.... i.... t__._J_3,.,A,,__,Bu..or

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Injection recirc to the Boric Acid Tanks P2.nel i/9 was below th Acceptance Crit_eri a

__ Q.J.:TI I Stipulated in the PT.

Repair of the defective circuit was initiated immediate_l...,yc...____,,T...... b...... i....,d

g_J]J L event 1.s a degraded mode of operation as specified in T. S. 3. 3. b. 5 and is report ab le _J 1ilIJ ~accordance with T.S.6.6.2.b.(2) Recirculation flow from the Boron Injection Tank was!

~IiJ J verified; therefore the health and safety of the public were not affected.

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8 9 80 SYSTEM

CAUSE

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CAUSE DESCRIPTION Ai~D c*oRRECTIVE ACTIONS @

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• ]~.I] LTo~-]j~~..g_I_ape fai 1 ed becanse of excess, ve b ea.t

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iDJJ LJ.nit_iated to change the manner by which these borated l~_

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failed tape was replaced.

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f-_t.C\\LITY STATUS

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DISCOVERY DESCRIPTION @

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e ATTACHMENT 1 SURR:Y PO"W_ER, STATION, UNIT 1 DOCKET NO:

50-280 REPORT NO:

80-057/03L-0 EVENT DATE: 8-18-80 TITLE OF REPORT:

1.

Description of Event

HEAT TRACING FAILURE With Unit #1 at 100 percent power PT-27D revealed that the amp readings for circuit 13A (Boron Injection Recirculation to the Boric Acid Tanks)

Panel #9 were below the Acceptance Criteria Stipulated in the PT.

Repair of the defective circuit was initiated immediately.

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.~.2.b. (2)

2.

Probable Consequences & Status of Redundant Systems:

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 aff:ected.

3.

Cause

The Heat Tracing Tape failed due to excessive heat.

4.

Immediate Corrective Action

The immediate corrective action was to verify that the redundant circuit was op*erable.

5.

Subsequent Corrective Action:

The defective Heat Tracing Circuit was replaced within the time span specified by the Technical Specifica ticms.

6. Action Taken to Prevent Recurrence:

No additional actions were deemed necessary.

7.

Generic Implications:

A task force bas reviewed the total spectrum of the Heat Tracing system and a Design Change is.being prepared as a result of the Task Force Study.

Long lead items are being procured.