05000316/LER-1979-051-03, /03L-0:on 791217,w/reactor in Mode 5,containment Spray Pump Discharge Valve Failed to Open.Caused by Limitorque Switch Binding Operator Mechanism.Torque Switch & Drive Motor Replaced

/03L-0:on 791217,w/reactor in Mode 5,containment Spray Pump Discharge Valve Failed to Open.Caused by Limitorque Switch Binding Operator Mechanism.Torque Switch & Drive Motor Replaced

ML19257C000
Person / Time
Site:	Cook
Issue date:	01/16/1980
From:	Michael Brown INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19257B999	List: 05000316/LER-1979-051-03, /03L-0:on 791217,w/reactor in Mode 5,containment Spray Pump Discharge Valve Failed to Open.Caused by Limitorque Switch Binding Operator Mechanism.Torque Switch & Drive Motor Replaced 05000316/LER-1979-052-03, /03L-0:on 791218,w/reactor in Mode 5,source Range Indication Was Inoperable for 23 Minutes.Caused by Maint Error While Working on Energized Equipment.Workers Reprimanded & Addl Training Held ML19257B998
References
LER-79-051-03L, LER-79-51-3L, NUDOCS 8001220533
Download: ML19257C000 (1)

LER-1979-051, /03L-0:on 791217,w/reactor in Mode 5,containment Spray Pump Discharge Valve Failed to Open.Caused by Limitorque Switch Binding Operator Mechanism.Torque Switch & Drive Motor Replaced

Event date:
Report date:
3161979051R03 - NRC Website

text

NRC FORM 366 v. a. nuw6can neuvLa s un e ovmmsaasun (7 77)

LICENSEE EVENT REPORT CONTROL BLOCK: l l

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8 60 61 DOCKET NUMBE R 68 69 EVENT DATg 74 75 REPORT DATE B0 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o

2 i WITH REACTOR IN MODE 5 WHILE PERFORMING TECH. SPEC. SURVEILLANCE 4.3.2.1.2 I

CONTAINMEf!T SPRAY PUMP DISCHARGE VALVE IM0-220 FAILED TO OPEN. THIS WAS ALSO I

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CONTRARY TO TECH. SPEC. 4.6.2.1.C.1.

VALVE IM0-221 IS REDUNDANT TO THE VALVE I

THAT FAILED AND IT WAS OPERABLE AT ALL TIMES.

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o l VALVE FAILURE WAS FOUND TO BE DUE TO THE LIMITOROVE TOROUE SWITCH BINDING I

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THE_0PERATOR MECHANISM. TOROUE SWITCH AND DRIVE MOTOR WERE REPLACED.

I VALVE INTERNALS WERE INSPECTED BUT NO ABh0RMALITIES WERE FOUND.

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