05000296/LER-1980-025-03, /03L-0:on 800625,during Normal Operation, Continuous Heat Detector Damaged & Caused False Alarm.Caused by Accidental Damage to Heat Detector by Personnel Performing Mods in Area.Craftsmen Cautioned

/03L-0:on 800625,during Normal Operation, Continuous Heat Detector Damaged & Caused False Alarm.Caused by Accidental Damage to Heat Detector by Personnel Performing Mods in Area.Craftsmen Cautioned

ML18025A994
Person / Time
Site:	Browns Ferry
Issue date:	07/24/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18025A993	List: 05000296/LER-1980-025, Forwards LER 80-025/03L-0 05000296/LER-1980-025-03, /03L-0:on 800625,during Normal Operation, Continuous Heat Detector Damaged & Caused False Alarm.Caused by Accidental Damage to Heat Detector by Personnel Performing Mods in Area.Craftsmen Cautioned
References
LER-80-025-03L-02, LER-80-25-3L-2, NUDOCS 8007290702
Download: ML18025A994 (4)

LER-1980-025, /03L-0:on 800625,during Normal Operation, Continuous Heat Detector Damaged & Caused False Alarm.Caused by Accidental Damage to Heat Detector by Personnel Performing Mods in Area.Craftsmen Cautioned

Event date:
Report date:
2961980025R03 - NRC Website

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GO 61 DOCKET NUMBER 68 69 FVFNT DESCRIPTION AND PROBABLE CONSEQUENCES QIO During normal operation a continuous strip heat detector was dama ed and caused KH EVENT DATE 74 75 REPORT DATE 80 7

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~a false alarm.

The alarm could have masked alarms from other detectors which are

g L required to be operable by T.S. 3.'ll. C. l.

There were no effects on public health 1 or safety.

There are no redundant systems.

Previous similar events

BFRO-50-296/79041.

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ersonnel erformin modifications in the area.

Detector, Kiddo Nodal 897096 50 feet continuous strati 2

~was replaced.

A fire watch was posted in the interim.

Craftsmen have been cautioned about working around this type of detector.

No further recurrence control required.

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Alarm received in cont rol room 45 4G LOCATIONOF REI.EASE NA 45 NRC USE l)NI.Y 68 69 PIIONE:

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Form BY-17 BF 1,").2 1/10/79 L'ER SUPPLEMENTAL INFORMATION BFRO-50-~26 /

5025 Technical SPecification involved 3.11.0.'1

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Reported-Under Technical Specification

6. 7. 2. b ~2 identification and t)~eacri tion'of Occurrence:

Detector TE-39-49B was damaged causing an alarm that would not clear.

Conditions Prior to Occurrence:

Unit l 8. 68%,

Unit 2 8 79%

Unit 3 8 98%

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Action specified in the Technical Specification Surveillance Requirements met d~~>>',

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Fire watch posted

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d The detector was damaged by personnel performing modifications in the area.-

Analysis of Occurrence:

There was no damage to plant equipment.

There was no activity release, no personnel exposure or in)ury and no danger to the health or safety of the public.

Corrective Action

The detector was replaced.

Failure Data:

BFRO-50-296/79004, 259/76010

~Retention:

eriod -,Lifetime; Responsibility - Administrative Supervisor

+Revision: