05000260/LER-1980-055-03, /03L-0:on 801208,core Spray Discharge Pressure switch,2-PS-75-16,found Set Outside Tech Spec Limits.Caused by Mercroid Model DA-7004-804 Setpoint Drift.Switch Inspected & Calibr

/03L-0:on 801208,core Spray Discharge Pressure switch,2-PS-75-16,found Set Outside Tech Spec Limits.Caused by Mercroid Model DA-7004-804 Setpoint Drift.Switch Inspected & Calibr

ML19340F016
Person / Time
Site:	Browns Ferry
Issue date:	01/06/1981
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19340F013	List: 05000260/LER-1980-055, Forwards LER 80-055/03L-0 05000260/LER-1980-055-03, /03L-0:on 801208,core Spray Discharge Pressure switch,2-PS-75-16,found Set Outside Tech Spec Limits.Caused by Mercroid Model DA-7004-804 Setpoint Drift.Switch Inspected & Calibr
References
LER-80-055-03L-02, LER-80-55-3L-2, NUDOCS 8101160498
Download: ML19340F016 (2)

LER-1980-055, /03L-0:on 801208,core Spray Discharge Pressure switch,2-PS-75-16,found Set Outside Tech Spec Limits.Caused by Mercroid Model DA-7004-804 Setpoint Drift.Switch Inspected & Calibr

Event date:
Report date:
2601980055R03 - NRC Website

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8 EVENT DESCRIPTION AND cA08 AFLE CONSEQUENCES h discharge pressure 7 g l During normal operation while performing SI 4.2.B-21. core spray Redundant switches l 5T51 I switch, 2-PS-75-16, was found 2.5 percent out of T.S. 3.1.B limits.

g l vere operable. There was no effect on the health or safety of the public. Previous,'

events: 259/7337, 259/783, 259/8046, and 260/8028.

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40 el 42 43 64 CAUSE OESCRIPrlON ANO CORRECTIVE ACTIONS h I i 10 l l The Mercroid Model DA-7004-804 setpoint had drifted. The switch was inspected.

icalibrated and tested for repeatability. No recurrence control action is planned:

i i g l failure is random in nature.

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