ML19294B447

LER 80-003/03L-0:on 800111,during Valve Realignment Per Special Procedure 80-1,PC-230MV Was Not Closing Completely. Caused by Improper Assembly of Gear Limit Switch in Limitorque Model SMB00 Operator

ML19294B447
Person / Time
Site:	Cooper
Issue date:	02/06/1980
From:	Scheer J NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19294B438	List: ML19294B437 ML19294B447
References
LER-80-003-03L, LER-80-3-3L, NUDOCS 8002280400
Download: ML19294B447 (1)

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> . IDuring valve realign =ent per Special Procedure 80-1, PC-230MV was found to not be 1 oi3 l closing completely. Section 3.7.D.1 of the Technical Specifications requires that j i 4 Ithis valve be operable during operation. The downatream valve PC-245AV, was oper- [

,!,i lable and was shut during the period of time the valve was not closinc properly. I I '" 'T_here t were no significant occurrences _as a result o f tMs event . and there was no  !

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i o lPC-230MV has a Limitorque Model SMB00 operator. During previous maintenance on the I'Iii valve. the geared limit switch assembly came apart and was improperly assembico oy 1

[ , ; ,1 l the electrician performing the maintenance. The geared limit switch assembly was l l ' I il l replaced and the valve was operated several times to verify proper operation. The l l A electricians were civen additional trainine on the repair of limit switches. J 90

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