05000366/LER-1980-025-03, /03L-0:on 800308,during Shutdown,While Performing Rhr(Lpci) Pump Start Timers Calibr,Relay 2E11-K75A Setpoint Exceeded Tech Specs.Caused by Setpoint Drift.Relay Recalibr

/03L-0:on 800308,during Shutdown,While Performing Rhr(Lpci) Pump Start Timers Calibr,Relay 2E11-K75A Setpoint Exceeded Tech Specs.Caused by Setpoint Drift.Relay Recalibr

ML19309A975
Person / Time
Site:	Hatch
Issue date:	03/25/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19309A969	List: 05000366/LER-1980-025, Forwards LER 80-025/03L-0 05000366/LER-1980-025-03, /03L-0:on 800308,during Shutdown,While Performing Rhr(Lpci) Pump Start Timers Calibr,Relay 2E11-K75A Setpoint Exceeded Tech Specs.Caused by Setpoint Drift.Relay Recalibr
References
LER-80-025-03L-01, LER-80-25-3L-1, NUDOCS 8004020437
Download: ML19309A975 (2)

LER-1980-025, /03L-0:on 800308,during Shutdown,While Performing Rhr(Lpci) Pump Start Timers Calibr,Relay 2E11-K75A Setpoint Exceeded Tech Specs.Caused by Setpoint Drift.Relay Recalibr

Event date:
Report date:
3661980025R03 - NRC Website

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60 61 OOCA ET NuvaEq 6d 63 EVENT OATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h (LPCI) Pumo Start Timers calibration, Durina shutdown while cerforming RHR I

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[ 0,3 i I relay 2E11-K75A was found at 13 sec which exceeds Tech Spec Table 3.3.3-2, i

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NARRATIVE

REPORT lGecrgia Power Company Plant E. I. Hatch Ba>!ey, Georgia 31513 Reportable Occurrence Report No. 50-366/1980-025.

On March 8, 1980, during shutdown while. performing RHR (LPCI) Pump Start Timers Calibration, relay 2E11-K75A was found to trip at 13 seconds, which exceeded Tech Spec Table 3.3.3-2, item 2.f.1, setpoint of 10 tl seconds.

The associated time delay l relays for RHR pumps 2E11-C002A,B and C were operable at the time.

The cause of this occurrence has been attributed to instrument drift. The instrument was recalibrated per General Electric Type CR2820 Time Delay Relay Calibration Procedure, and returned to service. This has not been a re-occurring problem. Unit I utilizes the same type of relays.

There was no effect upon public health or safety.

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