05000282/LER-1979-002-03, /03L-0 on 790126:diesel Cooling Water Pump 22 Failed to Start During Surveillance Test.Caused by Stuck Contacts in Licon Micro-Switch 11-104

/03L-0 on 790126:diesel Cooling Water Pump 22 Failed to Start During Surveillance Test.Caused by Stuck Contacts in Licon Micro-Switch 11-104

ML19261B605
Person / Time
Site:	Prairie Island
Issue date:	02/23/1979
From:	Hunstad A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19261B598	List: 05000282/LER-1979-002, Forwards LER 79-002/03L-0 05000282/LER-1979-002-03, /03L-0 on 790126:diesel Cooling Water Pump 22 Failed to Start During Surveillance Test.Caused by Stuck Contacts in Licon Micro-Switch 11-104
References
LER-79-002-03L-01, LER-79-2-3L-1, NUDOCS 7902280263
Download: ML19261B605 (1)

LER-1979-002, /03L-0 on 790126:diesel Cooling Water Pump 22 Failed to Start During Surveillance Test.Caused by Stuck Contacts in Licon Micro-Switch 11-104

Event date:
Report date:
2821979002R03 - NRC Website

text

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LICENSEE EVENT REPORT CONTROL BLOCK:

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60 61 DOCK ET NUMBER ts8 69 EVENT D ATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h [o l2l l During surveillance test, No. 22 Diesel Cooling Water Pump failed to start.

l Redundant equipment was operable. Not repetitive. Tech Spec 3.3.D.2.a l

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applies. Pump was again made operable in less than 14 hours1.62037e-4 days <br />0.00389 hours <br />2.314815e-5 weeks <br />5.327e-6 months <br />. No effect on g

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JJ 34 35 Jo 31 40 41 42 43 44 47 C AUSE DESCRIPTION AND CORRECTIVE ACTIONS lt lol Stuck contacts in a LICON Micro-Switch #11-104 (cmgga switch). Switch was replaced.

No further action is necessary since the present preventive maintenance program on this device is considered adequate, l

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