05000260/LER-1980-057-03, /03L-0:on 801215,pressure Switches PS-1-76,PS-1-82 & PS-1-86,which Monitor Main Steam Line Low Pressure,Were Found Outside Tech Spec Limits.Caused by Setpoint Drift. Switches Recalibr

/03L-0:on 801215,pressure Switches PS-1-76,PS-1-82 & PS-1-86,which Monitor Main Steam Line Low Pressure,Were Found Outside Tech Spec Limits.Caused by Setpoint Drift. Switches Recalibr

ML19340F133
Person / Time
Site:	Browns Ferry
Issue date:	01/13/1981
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19340F132	List: 05000260/LER-1980-057, Forwards LER 80-057/03L-0 05000260/LER-1980-057-03, /03L-0:on 801215,pressure Switches PS-1-76,PS-1-82 & PS-1-86,which Monitor Main Steam Line Low Pressure,Were Found Outside Tech Spec Limits.Caused by Setpoint Drift. Switches Recalibr
References
LER-80-057-03L-02, LER-80-57-3L-2, NUDOCS 8101190495
Download: ML19340F133 (2)

LER-1980-057, /03L-0:on 801215,pressure Switches PS-1-76,PS-1-82 & PS-1-86,which Monitor Main Steam Line Low Pressure,Were Found Outside Tech Spec Limits.Caused by Setpoint Drift. Switches Recalibr

Event date:
Report date:
2601980057R03 - NRC Website

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REPOR T D ATE de EVENT DESGalPTION AND PROBASLE CONSEQUENCES h lo(2l l During normal operation while performing SI 4.2. A-6, three pressure switches.

g o ; 3, ; monitoring main steam line low pressure, PS-1-76, d-1-82 and PS-1-86 were found

3 ;4 ; l 0.4 percent out of T.S. 3.2.A limits. Redundant switch PS-1-72 was operable. There I in,,,,; was no effect on the health or safety of the public. Previous events

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8057 T. rhnical Specirreat:on lavolvul 3.2.A 1 T'nder Technical Speafication 6.7.2.b(1) 9.E mcurrenet. 12/15/80 Time of Occurrence 1310 i;ni-2 i f n' '

ti u.. u l !)escri[,tjen,of_ Occurrence:

While perfoming SI 4.2. A-6, main steam line low pressure switches PS-1-76, PS-1-82 and PS-1-86 were found 0.4 percent out of tolerance.

I':i,r rc. Occurrenec:

Unit 1 at 99% power.

Unit 2 at 100% power.

Unit 3 refueling.

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,;,<.~fial in the Technical Specification Surveillance Require:aents met.

due inon. rable cauipment.

Describe.

None

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t Cause of 'L'currence:

Instrument drift.

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There was no damage to the 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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t"e /.* t ion :

Inspected, recalibrated, functionally tested for repeatability and returned to service.

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296/8045 and 260/7924.

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