05000259/LER-1980-089-03, /03L-0:on 801210,reactor Water Level Switch LIS-3-203B1 Found Outside Tech Spec.Caused by Setpoint Drift.Switch Recalibr

/03L-0:on 801210,reactor Water Level Switch LIS-3-203B1 Found Outside Tech Spec.Caused by Setpoint Drift.Switch Recalibr

ML19345F394
Person / Time
Site:	Browns Ferry
Issue date:	01/08/1981
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19345F392	List: 05000259/LER-1980-089, Forwards LER 80-089/03L-0 05000259/LER-1980-089-03, /03L-0:on 801210,reactor Water Level Switch LIS-3-203B1 Found Outside Tech Spec.Caused by Setpoint Drift.Switch Recalibr
References
LER-80-089-03L-02, LER-80-89-3L-2, NUDOCS 8102170395
Download: ML19345F394 (2)

LER-1980-089, /03L-0:on 801210,reactor Water Level Switch LIS-3-203B1 Found Outside Tech Spec.Caused by Setpoint Drift.Switch Recalibr

Event date:
Report date:
2591980089R03 - NRC Website

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o ; m During normal operation, while performing SI 4.1. A-7, reactor water level switch T LIS-3-203B switch 1~was found 0.43 percent out of T.S. table 3.1.A limit.

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JJ 40 41 42 43 44 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h [i3] [ The Barte n Model 288 setpoint had drifted.

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This switch vill be reolaced bv li;,i lan analog system by DCR 1398.

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Form BF-17 Browns Ferry Nuclear Plant BF 15.2 1/10/79 LER SUPPLEMENTAL INFORMATION t

BFRO 259 / 8089 Technical Specification Involved Table 3.1.A Reported Under Technical Specification

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Date of Occurrence 12/10/80 Time of Occurrence 1415 Unit 1

Identificatien and Description of Occurrence:

Reactor water level switch LIS-3-203B, operated 0.437. out of technical specification limit.

Conditions' Prior to Occurrence.:

Unit 1 at 98% power.

Unit 2 at 83% power.

tnit 3 at refueling, 1

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

None Apparent Cause of Occurrence.

l Instrument drift Analysis 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.

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Corrective Action

I Inspected, recalibrated and functionally tested the switch for repeatability.

s Failure Data:

259/7322, 259/7341, 259/7333, 259/7824, 259/741, 260/804,- 296/8028 and 260/8029.

• Retention :

eriod - Lifetime; Responsibility - Administrative Supervisor

• Revision:

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