05000282/LER-1979-033-03, /03L-0:on 791228,during Surveillance Test,Inlet Steam Supply Motor Valve to turbine-driven Auxiliary Feedwater Pump Tripped on Overload.Caused by Loosened Bell Screws Which Fell Into Motor,Causing Binding

/03L-0:on 791228,during Surveillance Test,Inlet Steam Supply Motor Valve to turbine-driven Auxiliary Feedwater Pump Tripped on Overload.Caused by Loosened Bell Screws Which Fell Into Motor,Causing Binding

ML19308B804
Person / Time
Site:	Prairie Island
Issue date:	01/14/1980
From:	Hunstad A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19308B800	List: 05000282/LER-1979-033, Forwards LER 79-033/03L-0 05000282/LER-1979-033-03, /03L-0:on 791228,during Surveillance Test,Inlet Steam Supply Motor Valve to turbine-driven Auxiliary Feedwater Pump Tripped on Overload.Caused by Loosened Bell Screws Which Fell Into Motor,Causing Binding
References
LER-79-033-03L, LER-79-33-3L, NUDOCS 8001170329
Download: ML19308B804 (1)

LER-1979-033, /03L-0:on 791228,during Surveillance Test,Inlet Steam Supply Motor Valve to turbine-driven Auxiliary Feedwater Pump Tripped on Overload.Caused by Loosened Bell Screws Which Fell Into Motor,Causing Binding

Event date:
Report date:
2821979033R03 - NRC Website

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8 80 61 DOCKET NUMB ER 68 69 EVENT DATE 74 76 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o 2 l During sitrveillance test. the inlet steam supply motor valve to No. 11 Turbine-Driven l A l Auxiliary Feedwater Pump tripped on overload while closing at the end of the test. -

I l All other auxiliary feedwater pumps were operable. Not repetitive. Tech Spec 3.4.A.2 l l

o 4 [Tfiq l applies. No effect on public health or safety. The pump was made operable in about l 0 6 l 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

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