05000260/LER-1980-044-03, /03L-0:on 801012,refueling Zone Inboard Isolation Time Delay Relay R3A Found Out of Tolerance & Nonrepetitive. Caused by Relay Failure.Relay,Agastat Model 7022 Ab,Replaced & Calibr

/03L-0:on 801012,refueling Zone Inboard Isolation Time Delay Relay R3A Found Out of Tolerance & Nonrepetitive. Caused by Relay Failure.Relay,Agastat Model 7022 Ab,Replaced & Calibr

ML18025B189
Person / Time
Site:	Browns Ferry
Issue date:	11/10/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18025B188	List: 05000260/LER-1980-044, Forwards LER 80-044/03L-0 05000260/LER-1980-044-03, /03L-0:on 801012,refueling Zone Inboard Isolation Time Delay Relay R3A Found Out of Tolerance & Nonrepetitive. Caused by Relay Failure.Relay,Agastat Model 7022 Ab,Replaced & Calibr
References
LER-80-044-03L, LER-80-44-3L, NUDOCS 8011140382
Download: ML18025B189 (4)

LER-1980-044, /03L-0:on 801012,refueling Zone Inboard Isolation Time Delay Relay R3A Found Out of Tolerance & Nonrepetitive. Caused by Relay Failure.Relay,Agastat Model 7022 Ab,Replaced & Calibr

Event date:
Report date:
2601980044R03 - NRC Website

text

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LICENSEE EVENT REPORT

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Dur'ing refueling operation while performing

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isolation time delay relay R3A was found to be out of tolerance and nonrepetitive.

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Refueling zone outboard isolation system was operable.

Reference T.S. table 3.2.A.

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Previous event:

BFRO-50-259/80007.

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Tennessee Valley thority Browns Ferry Nuclear Plant Form BF-17 BF 15.2 1/10/79 LER SUPPLEMENTAL INFORMATION BFRO-50-~~/

8044 Technical Specification Involved Table 3.2.A Reported Under Technical Specification 6.7.2.b 2

Date of Occurrence 10/12/80 Time of Occurrence 0900'nit 2

Identification and Descri tion'of Occurrence:

While performing S.I. 4.2.A-16 'Calibration Reactor Building Isolation and/or Logic Timers" (refueling zone and reactor zone) units 1, $, and 3s the refueling. zone inboard isolation relay R3A did not time out in 60'-

3 cycles.

There was no fuel handling activity during this time.

Conditions "Prior to Occurrence:

Unit 1 8 94%

Unit 2 8 0% refueling outage Unit 3 8 98%

Action specified in the Technical Specification Surveillance Requirements met due to ino erable e ui ment.

Describe.

NA A

arent Cause of Occurrence:

Cause of event, was relay failure.

Anal sis 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 timer was replaced and calibrated per SI 4.2.A-16.

Failure Data:

BFRO-5 0-25 9/80007 F

• Retention:

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• Revision:

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