05000366/LER-1981-010-03, /03L-0:on 810222,reactor Core Isolation Cooling Auto Flow Controller Did Not Control Turbine Properly While in Auto Position During Quickstart Test.Caused by Loose Ribbon Connector on Flow Control M-4 Station

/03L-0:on 810222,reactor Core Isolation Cooling Auto Flow Controller Did Not Control Turbine Properly While in Auto Position During Quickstart Test.Caused by Loose Ribbon Connector on Flow Control M-4 Station

ML19350A323
Person / Time
Site:	Hatch
Issue date:	03/05/1981
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19350A322	List: 05000366/LER-1981-010, Forwards LER 81-010/03L-0 05000366/LER-1981-010-03, /03L-0:on 810222,reactor Core Isolation Cooling Auto Flow Controller Did Not Control Turbine Properly While in Auto Position During Quickstart Test.Caused by Loose Ribbon Connector on Flow Control M-4 Station
References
LER-81-010-03L, LER-81-10-3L, NUDOCS 8103130469
Download: ML19350A323 (2)

LER-1981-010, /03L-0:on 810222,reactor Core Isolation Cooling Auto Flow Controller Did Not Control Turbine Properly While in Auto Position During Quickstart Test.Caused by Loose Ribbon Connector on Flow Control M-4 Station

Event date:
Report date:
3661981010R03 - NRC Website

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EVENT DESCRIPTION AND PROBABLE CONSEcuENCES h o 2 10n 2-22-81, Uni t 2 was operatino at steady state 15% thermal power.

An I o 3 lRCIC quickstart test was performed in reoards to RCIC auto flow control I l problems.

The flow controller would not control the RCIC turbine prop-I o n o s lerly while in the AUTO position.

HPCI, ADS, core soray, and LPCI were 1

o s loperable at the time of the event.

There were no effects upon oublic l

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CAUSE oESCRIPTioN AND CORRECTIVE actions 27 litolIThe flow controller would not function procerly while in the AUTO due toI la loose ribbon connector on the flow control M/A station.

The connec-I i i l tion was repaired, and a quickstart test was cerformed successfully.

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, 2 litalIRCIC was declared coera<le.

The unit is now in full comoliance with thel l requirements, and no further reportino is reouired.

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LER #:

50-366 /1981 - 010 Licensee:

Georgia Power Company Facility Name:

Edwin I.

Hatch Docket #:

50-366

Narrative

Report for LER 5 0-3 66 /19 81 - 010 On 2-22-81, Unit 2 was operating in the RUN mode at 15% ther-mal power.

The unit was preparing to roll the main turbine.

An RCIC quickstart test was performed as a result of apparent RCIC auto flow controller problems experienced following a

manual initiation during a scram from 13% -thermal power at 14:46 on 2-21-81.

The flow controller would not control -the RCIC turbine properly while in the AUTO position.

RCIC was declared inoperable and was determined reportable under plant Tech Specs section 6 9 1 9.b.

HPCI,, ADS, core spray, and LPCI were operable at the time of the event.

There were no effects upon public health and safety due to this event.

This is a

.noncepetitive occurrence.

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The flow controller would not function properly while in the AUTO position due to a loose ribbon connector on the flow control M/A station (vendor GE, part #547121FAAZ2, MPL 2E51-K612).

The connection was repaired, and a quickstart test was performed successfully.

RCIC was declared operable and the unit is now in full compliance with the requirements and no further reporting is required.

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