05000321/LER-1980-124-03, /03L-0:on 801228,control Room Air Intake Isolation Valve 1Z41-F012 Failed to Close in Required Time.Caused by Faulty Pilot Solenoid Operator.Pilot Solenoid Replaced

/03L-0:on 801228,control Room Air Intake Isolation Valve 1Z41-F012 Failed to Close in Required Time.Caused by Faulty Pilot Solenoid Operator.Pilot Solenoid Replaced

ML20002E197
Person / Time
Site:	Hatch
Issue date:	01/15/1981
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20002E160	List: 05000321/LER-1980-124, Forwards LER 80-124/03L-0 05000321/LER-1980-124-03, /03L-0:on 801228,control Room Air Intake Isolation Valve 1Z41-F012 Failed to Close in Required Time.Caused by Faulty Pilot Solenoid Operator.Pilot Solenoid Replaced
References
LER-80-124-03L-01, LER-80-124-3L-1, NUDOCS 8101260626
Download: ML20002E197 (2)

LER-1980-124, /03L-0:on 801228,control Room Air Intake Isolation Valve 1Z41-F012 Failed to Close in Required Time.Caused by Faulty Pilot Solenoid Operator.Pilot Solenoid Replaced

Event date:
Report date:
3211980124R03 - NRC Website

text

U.S. NUCLEAR REGULATcRY COMMISSION NRC FORM 366 (1 77)

LICENSEE EVENT REPORT

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8 60 61 OOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lo 121 l With the plant at a steady state of operation while performing HNP l 0 a 1 3973, Control Room Air Intake Isolation Valve Operability, the 1Z41-F0121 10141Ivalve failed to meet acceptable' closing time criteria per Tech Soecs i

I O l s ! l 3.12.B.

Plant operation was not affected as a result of this event.

I lThis was not a repetitive occurrence.

Public health and safety were I

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34 35 36 31 40 41 42 43 44 47 33 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h lilol lThe cause of the valve failing to close in the desired length of time I

li lij lwas due to a f aulty pilot solenoid operator..The pilot solenoid was I

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NAME OF PREPAHER

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LER #:

50-321/1980-124 Licensee:

Georgia Power Company Facility Name:

Edwin I.

Hatch bocket #:

50-321

Narrative

Report for LER 50-321/1980-124 With the plant at a steady state of operation while performing HNP-1-3973, control Room Air intake Isolation Valve Operabili-ty, the 1C41-F012 valve failed to meet acceptable closing time criteria per Tech Specs 3.12.B.

Plant operation was not affected as a result of this event.

This was not a repetitive occurrence.

The cause of the valve failing to close in the desired length of time was due to a faulty pilot solenoid operator.

The Os, pilot scienoid operator controls the HVAC outside air filter bypass isolation damper.

The pilot solenoid was replaced, and HNP-1-3973 performed satisfactorily.

A ge.neric review of both Hatch Unit 1 and Unit 2 reveals no inherent problems with valve operators of this type.

The public health and safety were in no way affected by this incident.

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