05000296/LER-1980-030-03, /03L-0:on 800813,during Normal Operation, Performing Surveillance Instruction 4.1.A.14,pressure Switches PS-1-81-A & PS-1-91-A Found Set Above Limits. Caused by Setpoint Drift.Switches Recalibr & Tested

/03L-0:on 800813,during Normal Operation, Performing Surveillance Instruction 4.1.A.14,pressure Switches PS-1-81-A & PS-1-91-A Found Set Above Limits. Caused by Setpoint Drift.Switches Recalibr & Tested

ML19331E215
Person / Time
Site:	Browns Ferry
Issue date:	09/05/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19331E214	List: 05000296/LER-1980-030, Forwards LER 80-030/03L-0 05000296/LER-1980-030-03, /03L-0:on 800813,during Normal Operation, Performing Surveillance Instruction 4.1.A.14,pressure Switches PS-1-81-A & PS-1-91-A Found Set Above Limits. Caused by Setpoint Drift.Switches Recalibr & Tested
References
LER-80-030-03L-03, LER-80-30-3L-3, NUDOCS 8009090341
Download: ML19331E215 (2)

LER-1980-030, /03L-0:on 800813,during Normal Operation, Performing Surveillance Instruction 4.1.A.14,pressure Switches PS-1-81-A & PS-1-91-A Found Set Above Limits. Caused by Setpoint Drift.Switches Recalibr & Tested

Event date:
Report date:
2961980030R03 - NRC Website

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Tennessee Valley Authority Forin BF-17 Browns Ferry Nuclear Plant BF 15.2 1/10/79 LER SUPPLEMENTAL INFORMATION BFRO-50 296 /_ 8030 Technical Specification involved Table 3.1.A Reported Under Technical Specifier. tion 6.7.2.b(2)

Date of Occurrence 8/13/80 Time of Occurrence 0930

_ Unit 3

Identification and Description 'of' Occurrence:

PS-1-81A and PS-1-91A, Turbine First Stage Fressure, setpoints had drif ted above T.S. limits. Setpoints were found to be 174 psig and 169 psig, respectively, during SI testing.

T.S. limit is 167 psig.

Conditions Prior to Occurrence:

7Lnit 1 at 957. TME-Unit 2 at 94% We Unit 3 at 98% We Action specified in the Technical 8pecification Surveillance Requirements met jue to inoperable equipment. Describe N/A A_pparent Cause of Occurrene_e:

Instrument drift.

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Analysis of Occurrence:

There was no damage to the plant equipment. Ther i was no activity re Nase, no personnel exposure or injury and no danger to the health or safety of the

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public.

Corrective Action

Inspected, recalibrated and functionally tested for repeatability. These swite,hes will be replaced by an-analog system.

1 Fjagure Data:

259/8058, 259/798, 259/7816, 260/8022, 260/7916, 296/8022, 296/7912 and 296/797.

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• Retention : -

eriod - Lifetime; Responsibility - Administrative Supervisor

• Revision:

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