05000321/LER-1979-022-03, /03L-0 on 790120:during Normal Operation & Procedure HNP-1-3405,core Isolation Cooling Min Flow Valve (E51-F006) Failed to Close Automatically at 80 Gpm.Caused by Failure of Open Limit Switch

/03L-0 on 790120:during Normal Operation & Procedure HNP-1-3405,core Isolation Cooling Min Flow Valve (E51-F006) Failed to Close Automatically at 80 Gpm.Caused by Failure of Open Limit Switch

ML19270F545
Person / Time
Site:	Hatch
Issue date:	02/09/1979
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19270F544	List: 05000321/LER-1979-022, Forwards LER 79-022/03L-0 05000321/LER-1979-022-03, /03L-0 on 790120:during Normal Operation & Procedure HNP-1-3405,core Isolation Cooling Min Flow Valve (E51-F006) Failed to Close Automatically at 80 Gpm.Caused by Failure of Open Limit Switch
References
LER-79-022-03L, LER-79-22-3L, NUDOCS 7902150419
Download: ML19270F545 (2)

LER-1979-022, /03L-0 on 790120:during Normal Operation & Procedure HNP-1-3405,core Isolation Cooling Min Flow Valve (E51-F006) Failed to Close Automatically at 80 Gpm.Caused by Failure of Open Limit Switch

Event date:
Report date:
3211979022R03 - NRC Website

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LICENSEE EVENT REPORT CONinOt tiLOCM: l l

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(.1 LOCK'E1 NUMOEH EVENT DESCHtPTION Af40 PROO ACLE CONSEQUENCES procedure HNP-1-3405 (RCIC pumn ra ted 1

E l Durina normal operation, while perfccminq 1

_ flow), the RCIC minimum ficw valve (E51-F006) failed to auto-close at 80 GPM 31 j

y l(Technical Specification Table 3.2-3). The RCIC system was declared incnerative I

~ITl I and the requirements of Technical Specification 4.5.E.2 conolied with. There were 1

c. l no effects to public health and safety as a result of this incider.t.

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40 44 42 43 44 gy 35 ao CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 33 g lThe f ailure of the valve to close was due to the open limit switch havina failed.

1 I ecause the open torque switch of this valve is byoassed there was nothino to stoo B

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lthe valves caen travel which resulted in damage to the valve operator and toraue I

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l switch. The coerator was repaired, the torque switch and limit switches were

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gi14l l replaced.

(cont.)

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8 9 DISCOVERY DESCHIPTION NA l

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NAME OF POEPAnER -

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l GE0aGI A PO'1ER C0!'.PA!!Y PLA!!T E. I. HATCH BAXLEY, GEORGIA 31513 Reportable Occurrence tio. 50-321/1979-22.

Cause Description (cont.)

The valve was then satisfactorily retested pri to being returned to service.

This is not a repetitive occurrence.

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