05000321/LER-1981-066-03, /03L-0:on 810701,during Steady Operation & While Performing Reactor Water Level Functional Test & Calibr, Bota Reactor Recirculation Pumps Tripped,Resulting in Power Reduction.Caused by Personnel Error

/03L-0:on 810701,during Steady Operation & While Performing Reactor Water Level Functional Test & Calibr, Bota Reactor Recirculation Pumps Tripped,Resulting in Power Reduction.Caused by Personnel Error

ML20009E466
Person / Time
Site:	Hatch
Issue date:	07/17/1981
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009E465	List: 05000321/LER-1981-066, Forwards LER 81-066/03L-0 05000321/LER-1981-066-03, /03L-0:on 810701,during Steady Operation & While Performing Reactor Water Level Functional Test & Calibr, Bota Reactor Recirculation Pumps Tripped,Resulting in Power Reduction.Caused by Personnel Error
References
LER-81-066-03L, LER-81-66-3L, NUDOCS 8107280235
Download: ML20009E466 (2)

LER-1981-066, /03L-0:on 810701,during Steady Operation & While Performing Reactor Water Level Functional Test & Calibr, Bota Reactor Recirculation Pumps Tripped,Resulting in Power Reduction.Caused by Personnel Error

Event date:
Report date:
3211981066R03 - NRC Website

text

LICENSEE EVENT REPORT CONTROL BLOCK: {l l

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60 61 DOCKET NUMBER 68 69 EVENT DATE 14 75 REPORT DATE 80 EVENT DESCRIPTION AND PROB A8LE CONSEQUENCES h 10 l 2 l l While the plant was in steady state operation at 92% power and performing i

iO i3l l Reactor Water Level (ADS) Functional Test _ and Calibration, both Reactor l

10141 l Recirculation Pumps tripped when returning 1821-N042B, Reactor Water l

101._11 Level ( ADS) Yarway, to service. Tech Specs 3.6.J.1 requires forced l

l0 ls l l circulation above 1% power. All ECCS systems were operable. A temporary l

l O l 71 l forced power reduction resulted.

The health and safety of the public was l

l O is i l not affected.

This is a non-repetitive event.

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.' IiiOI l The cause of this event was personnel error.

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The resulting perturbation I

i, i7i l in the common sensing line caused Reactor High Pressure Recirc Pump Trip l

lij3l l switches to actuate.

P'.. sonnel were counseled on proper instrument l

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R. T. Nix, Supt. of Maint.

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NAME OF PREPARER

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LER No.:

50-321/1981-066 i

Licensee:

Georgia Power Company Facility:

Plant E. I. Hatch 3-Docket No.:

50-321 i

Narrative

Report for LER 50-321/1981-066 i

On July 1,1981, while the plant was in steady state operation at 92%

power and performing Reactor Water Level (ADS) Functional Test and Calibration, both Reactor Recirculation Pumps tripped when returning 1B21-N0428, Reactor Water Level (ADS) Yarway, to service.

Tech Specs 3.6.J.1 requires forced circulation above 1% power. All ECCS systems were operable.

This event resulted in a temporary forced power reduction.

The health and safety of the public was not affected.

The cause of this event was personnel error.

The technician failed to valve in instrument IB21-i!042B slowly enough.

The resulting perturbation in the common sensing line caused Reactor High Pressure Recirc Pump Trip switches to actuate.

Personnel were counseled on proper instrument valving.

J A generic review revealed no inherent problems.

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