05000296/LER-1980-014-03, /03L-0:on 800512,during Normal Operation,Reactor Core Isolation Cooling Tripped on Overspeed Due to Loss of Speed Control.Caused by Diode in Egm Box Failure Due to End of Life.Egm Box Replaced & Calibr

/03L-0:on 800512,during Normal Operation,Reactor Core Isolation Cooling Tripped on Overspeed Due to Loss of Speed Control.Caused by Diode in Egm Box Failure Due to End of Life.Egm Box Replaced & Calibr

ML18025A920
Person / Time
Site:	Browns Ferry
Issue date:	06/10/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18025A919	List: 05000296/LER-1980-014, Forwards LER 80-014/03L-0 05000296/LER-1980-014-03, /03L-0:on 800512,during Normal Operation,Reactor Core Isolation Cooling Tripped on Overspeed Due to Loss of Speed Control.Caused by Diode in Egm Box Failure Due to End of Life.Egm Box Replaced & Calibr
References
LER-80-014-03L-03, LER-80-14-3L-3, NUDOCS 8006170592
Download: ML18025A920 (4)

LER-1980-014, /03L-0:on 800512,during Normal Operation,Reactor Core Isolation Cooling Tripped on Overspeed Due to Loss of Speed Control.Caused by Diode in Egm Box Failure Due to End of Life.Egm Box Replaced & Calibr

Event date:
Report date:
2961980014R03 - NRC Website

text

V

,. I'ennessee Valley Authorit Brogans Ferry Nuclear Plant Form PF-17 BF 15.2 1/10/79 LER SUPPLEMENTAL INFORMATION BFRO 2~/8014 Technical Specification Involved 3.5.F. 2 f* ~

f*

Identification and Descri tion'of Occurrence:

While performing S.I. 4.5.F.1 d&e RCIC tripped on overspeed due to loss of speed control.

Con'ditions Prior to Occurrence:

Unit 1 8 98%

Unit 2 8 99%

Unit 3 8 100%

Action specified in the Technical Specification Surveillance Requirements met D

HPCI proven operable.

Apparent Cause of Occurrence:

Loss of speed control was due to the end of life of a diode in the EGM box.

'Anal sis of -Occurrence:

There was no damage to plant equipment.

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

Corrective Action

The EGM box was replaced and calibrated.

Failure Data:

NA

~Retention:

~Revision:

'eriod - Lifetime; Responsibility - Administrative Supervisor

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