05000259/LER-1981-023-03, /03L-0:on 810510,damaged Cable Heat Tray Detector Caused False Alarm Which Could Have Masked Other Alarms. Probable Cause of Damaged Heat Detector Attributed to Cable Pulling Crew.Heat Detector Replaced & Functionally Tested

/03L-0:on 810510,damaged Cable Heat Tray Detector Caused False Alarm Which Could Have Masked Other Alarms. Probable Cause of Damaged Heat Detector Attributed to Cable Pulling Crew.Heat Detector Replaced & Functionally Tested

ML20004D654
Person / Time
Site:	Browns Ferry
Issue date:	06/04/1981
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20004D647	List: 05000259/LER-1981-023, Forwards LER 81-023/03L-0 05000259/LER-1981-023-03, /03L-0:on 810510,damaged Cable Heat Tray Detector Caused False Alarm Which Could Have Masked Other Alarms. Probable Cause of Damaged Heat Detector Attributed to Cable Pulling Crew.Heat Detector Replaced & Functionally Tested
References
LER-81-023-03L, LER-81-23-3L, NUDOCS 8106090618
Download: ML20004D654 (2)

LER-1981-023, /03L-0:on 810510,damaged Cable Heat Tray Detector Caused False Alarm Which Could Have Masked Other Alarms. Probable Cause of Damaged Heat Detector Attributed to Cable Pulling Crew.Heat Detector Replaced & Functionally Tested

Event date:
Report date:
2591981023R03 - NRC Website

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" Tennessee Valley Authority Form BF-17 Browns Ferry Nuclear Plant BF 15.2 3/24/81 LER SUPPLEMENTAL INFORMATION BFRO 259 / 81023 Technical Specification Involved 3.11.C.1 Reported Under Technical Specification

6. 7.2.b (2)

Date of Occurrence 5/10/81 Time of Occurrence 1315 Unit 1

Identification and Description of Occurrence:

A heat detector cable was damaged, rendering TE 39-44C inoperable, and causing an alarm in the control room.

Conditions Prior to Occurrence:

Unit 1 refueling outage Unit 2 at 83%

Unit 3 at 97%

Action specified in the Technical Specification Surveillance Requirements met due to inoperable equipment. Describe.

Met surveillance requirements of T.S. 3.11.C.2.

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\\pperent Cause of O_ccurrence

cable pulling crew probably damaged the heat detector.

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Analysis of Occurrence:

There was no danger to the health or safety of the public, no release of activity, no damage to the plant or equipment and no resulting significant chain of events.

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Corrective Action

Replaced heat detector and functionally tested.

l Failure Data:

l BFRO-50-259/76010W; 296/79004, 80025.

• Retention : Period - Lifetime; Responsibility - Document Control Supervisor

• Revision :

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