05000348/LER-1980-052-03, /03L-0:on 800829,electronic Switching Sys B1H Sequencer Failed to Meet Time Requirement for Steps 2 & 3. Caused by Setpoint Drift.Agastat Timers Satisfactorily Reset

/03L-0:on 800829,electronic Switching Sys B1H Sequencer Failed to Meet Time Requirement for Steps 2 & 3. Caused by Setpoint Drift.Agastat Timers Satisfactorily Reset

ML19347A905
Person / Time
Site:	Farley
Issue date:	09/26/1980
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19347A904	List: 05000348/LER-1980-052, Forwards LER 80-052/03L-0 05000348/LER-1980-052-03, /03L-0:on 800829,electronic Switching Sys B1H Sequencer Failed to Meet Time Requirement for Steps 2 & 3. Caused by Setpoint Drift.Agastat Timers Satisfactorily Reset
References
LER-80-052-03L, LER-80-52-3L, NUDOCS 8009300515
Download: ML19347A905 (1)

LER-1980-052, /03L-0:on 800829,electronic Switching Sys B1H Sequencer Failed to Meet Time Requirement for Steps 2 & 3. Caused by Setpoint Drift.Agastat Timers Satisfactorily Reset

Event date:
Report date:
3481980052R03 - NRC Website

text

l' I T v NRC F027.1346 U. C. NUCLl:AM HIGULATO2Y COMMISSION (7 77)

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7 LICENSEE EVENT REPORT CONTROL 8LOCs0 l l

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8 60 St DOCK ET NUMBER 64 43 EVENT OATE 74 75 REPORT DATE 80 EVENT OESCRIPTION AND PROBABLE CONSEQUENCES h 8 l At 1810 on 8-29-80, while performing FNP-1-STP-28.1, the ESS BlH I

O 3 l Sequencer failed to meet the time requirement for picking up steps l

1 2 and 3.

Tech. Spec. 3.8.1.1 requires two separate independent diesel I 0 8 lOlsil generator sets and sequencers to be operable.

Diesel Generator 1C was i O s I restored to an operable status at 1940 on 8-29-80. (Diesel Generator l

lTITli 1C would have picked up required loads in an ESS condition.)

This I

l0pil occurrenca did not affect the health and safety of the general public.

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CAUSE

CAUSE COMP.

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32 J4 3's 36 Ji 40 41 42 43 44 47 C AUSE OESCRIPTION AND CORRECT ; ACTIONS l i l o l l This incident is attributable to retpoint drif t.

The agastat timers I

L'_LU l were adiusted and a satisfactory retest per the applicable cortion of I

y l FNP-1-STP-28.1 was performed.

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