05000280/LER-1980-050-03, /03L-0:on 801228,amp Reading for Circuit 13A Boron Injection Recirculation to Boric Acid Tank Panel 8 Was Below Acceptance Criteria.Caused by Failure of Heat Tracing Tape Due to Excessive Heat.Heat Tracing Design Change Init

/03L-0:on 801228,amp Reading for Circuit 13A Boron Injection Recirculation to Boric Acid Tank Panel 8 Was Below Acceptance Criteria.Caused by Failure of Heat Tracing Tape Due to Excessive Heat.Heat Tracing Design Change Initiated

ML18139B011
Person / Time
Site:	Surry
Issue date:	01/15/1981
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139B010	List: 05000280/LER-1980-050-03, /03L-0:on 801228,amp Reading for Circuit 13A Boron Injection Recirculation to Boric Acid Tank Panel 8 Was Below Acceptance Criteria.Caused by Failure of Heat Tracing Tape Due to Excessive Heat.Heat Tracing Design Change Init 05000280/LER-1980-074-03, /03L-0:on 801218,power Leads to MOV-1867A & C Discovered to Have Been Reversed.Cause Undetermined.Power Leads Returned to Normal & Valves Tested ML18139B009
References
LER-80-050-03L-03, LER-80-50-3L-3, NUDOCS 8101200343
Download: ML18139B011 (2)

LER-1980-050, /03L-0:on 801228,amp Reading for Circuit 13A Boron Injection Recirculation to Boric Acid Tank Panel 8 Was Below Acceptance Criteria.Caused by Failure of Heat Tracing Tape Due to Excessive Heat.Heat Tracing Design Change Initiated

Event date:
Report date:
2801980050R03 - NRC Website

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60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

ffi I With Unit ://:2 at 100% power, PTc-2 7D revealed that the amp reading for c:j rcn:i t 13A Baran II] I Injection recirc to the Boric Acid Tanks 1 Panel #8 was below the Acceptance Criteria EJ stipulated in the: PT.

Repair of the defective circuit was initiated immediately.

ill This event is a degraded mode of operation as specified in T.S. 3.3.b.5 and is ill I reportable in accordance with T.S.6.6.2.b.(2).,Recirculation flow from the Boron ill I Injection Tank was verified; therefore the health and safety of the public were not ill affected.

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.:3 47 I::§] I The Heat Tracing Tape failed because of excessive heat.

A desjgn change bas been ill initiated to change the manner by which these borated lines are heat traced Tbe.

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ATTACHMENT 1 SURRY POWER STATION, UNIT 2 DOCKET NO:

50-281 REPORT NO:

80-050/03L-0 EVENT DATE:

12-28-80 TITLE OF REPORT:

HEAT TRACING FAILURE

1.

DESCRIPTION of EVENT

With Unit #2 at 100 percent power, PT-27D revealed that the amp readings for circuit 13A (Boron Injection Recirculation to the Boric Acid Tanks)

Panel #8 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. 6.6.2.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 affected.

3.

CAUSE

The Heat Tracing Tape failed due to excessive heat.

4.

IMMEDIATE CORRECTIVE ACTION

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

5.

SUBSEQUENT CORRECTIVE ACTION:

The defective Heat Tracing Ci-rcuit -was replaced within the time span specified by the Technical Specifications.

6.

ACTION TAKEN to PREVENT RECURRENCE:

No additional actions were 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 as a result of the Task Force Study.

Long lead.items are being procured.