ML19345F394

LER 80-089/03L-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: ML19345F391 ML19345F394
References
LER-80-089-03L-02, LER-80-89-3L-2, NUDOCS 8102170395
Download: ML19345F394 (2)

Text

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• LICENSEE EVENT REPORT

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(PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATIONI l o l i l l ^l Ll B l R l F j 1 lg 0 l 0 l - l 0 l 0 l 0 l 0 l 0 l - l 0 l 0 l@l 4 l 1 l 1 l 1 l 1 [@lSi LATl is4] {,

J B 9 LICENSEE CODE 14 tb LICENSE NUM8ER 25 26 LICEN t TYPE 40 CON'T I0itI -

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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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gg,; ; There was no effect on the health or safety of the public. Redundant switches g ,, ,

were operable. Previous events: 259/7322, 259/7341, 259/7333, 259/7824, 259/741,

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[i3] [ The Barte n Model 288 setpoint had drifted. The switch was inspected. reen11brated i i land functionally tested for repeatabilitv. This switch vill be reolaced bv li;,i lan analog system by DCR 1398.

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bnr.essee Valley Authority 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 6. 7. 2. b (1)

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. j Corrective Action:

Inspected, recalibrated and functionally tested the switch for repeatability. I 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: D p '

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