05000259/LER-1980-083-03, /03L-0:on 801107,HPCI Steam Line Space High Temp Switch TS-73-2E Found to Trip at 235 F,Exceeding Limit. Caused by Fenwal Model 17023-6 Temp Switch Drift.Switch Recalibr

/03L-0:on 801107,HPCI Steam Line Space High Temp Switch TS-73-2E Found to Trip at 235 F,Exceeding Limit. Caused by Fenwal Model 17023-6 Temp Switch Drift.Switch Recalibr

ML19345D312
Person / Time
Site:	Browns Ferry
Issue date:	12/05/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19345D310	List: 05000259/LER-1980-083, Forwards LER 80-083/03L-0 05000259/LER-1980-083-03, /03L-0:on 801107,HPCI Steam Line Space High Temp Switch TS-73-2E Found to Trip at 235 F,Exceeding Limit. Caused by Fenwal Model 17023-6 Temp Switch Drift.Switch Recalibr
References
LER-80-083-03L-01, LER-80-83-3L-1, NUDOCS 8012120477
Download: ML19345D312 (2)

LER-1980-083, /03L-0:on 801107,HPCI Steam Line Space High Temp Switch TS-73-2E Found to Trip at 235 F,Exceeding Limit. Caused by Fenwal Model 17023-6 Temp Switch Drift.Switch Recalibr

Event date:
Report date:
2591980083R03 - NRC Website

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Form BF-17 Teonessee Valley Authority BF 15.2 Browns Ferry Nuclear Plant 1/10/79 LER SUPPLEMENTAL INFORMATION T.S.3.2.B BFRO 259 / 8083 Technical Specification Involved 6.7.2.b(1)

Reported Under Technical Specification Date of Occurrence 11/7/80 Time of Occurrence 1000 Unit 1

Identification and Description of Occurrence:

While perf orming SI 4.2.B,37, HPCI steam line space high temperature switch TS-73-2E was found to trip.at 235 F.

Conditions' Prior to Occurrence:

thit 1 at 98%

Lhit 2 refueling Unit 3 at 89%

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

None Apparent Cause of Occurrence:

Instrument setpoint drif t.

Analysis of Occurrence:

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

Corrective Action

Recalibrated and functionally tested for repeatability.

Failure Data:

None

• Retention:

eriod - Lifetime; Responsibility - Administrative Supervisor

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