ML19309A975

LER 80-025/03L-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

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: ML19309A968 ML19309A975
References
LER-80-025-03L-01, LER-80-25-3L-1, NUDOCS 8004020437
Download: ML19309A975 (2)

Text

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REPORT DATE 80 i 8 60 61 OOCA ET NuvaEq EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lTTTI l Durina shutdown while cerforming RHR (LPCI) Pumo Start Timers calibration, I

[ 0 ,3 i I relay 2E11-K75A was found at 13 sec which exceeds Tech Spec Table 3.3.3-2, i 10 9 : [ item 2.f.1, setpoint of 10 tl sec. RHR pump start relays for pumps A,B.C l 101s1l were operable. There was no effect upon public health or safety. l 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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