05000348/LER-1980-026-03, /03L-0:on 800405,erroneous Temp Change Alarm Was Received.Upon investigation,lead-lag Card in Circuit Found to Have Unstable Output.Cause unstated.Lead-lag Card Replaced

/03L-0:on 800405,erroneous Temp Change Alarm Was Received.Upon investigation,lead-lag Card in Circuit Found to Have Unstable Output.Cause unstated.Lead-lag Card Replaced

ML19323B443
Person / Time
Site:	Farley
Issue date:	05/05/1980
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19323B441	List: 05000348/LER-1980-026-03, /03L-0:on 800405,erroneous Temp Change Alarm Was Received.Upon investigation,lead-lag Card in Circuit Found to Have Unstable Output.Cause unstated.Lead-lag Card Replaced 05000348/LER-1980-027-03, /03L-0:on 800408,during Surveillance Test,Turbine First Stage Pressure Bistable PB447E Found to Trip,At Value Less than Tech Spec 3.3.2.1 Limit.Caused by Instrument Setpoint Drift.Loop Power Supply Card Adjusted ML19323B440
References
LER-80-026-03L, LER-80-26-3L, NUDOCS 8005120377
Download: ML19323B443 (1)

LER-1980-026, /03L-0:on 800405,erroneous Temp Change Alarm Was Received.Upon investigation,lead-lag Card in Circuit Found to Have Unstable Output.Cause unstated.Lead-lag Card Replaced

Event date:
Report date:
3481980026R03 - NRC Website

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EVENT OATE 14 7b REPCRT QATE 80 EVENT OESCRIPTICN AND PACS AstE CONSCOUENCES h 10!21lAt 1600 on 4-5-80, the OTAT alarm was received. A check of plant parameters indicated [

that this was an erroneous indication. Upon investigation a lead-lag card in the 9

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h j i l o t lThe defective lead-lag card (Cl-130) was replaced.

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