ML19308B804

LER 79-033/03L-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

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: ML19308B799 ML19308B804
References
LER-79-033-03L, LER-79-33-3L, NUDOCS 8001170329
Download: ML19308B804 (1)

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7 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 o 4 l All other auxiliary feedwater pumps were operable. Not repetitive. Tech Spec 3.4.A.2 l l

[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 />. l

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l 40 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i o l Motor end hall s e rai.ra innaanaa nna fall inen mnene canaino hinaino. Screws were l ,

i i l replaced. Tightness check w'11 be made part of periodic surveillance. I 1 2 l l i a l I i 4 I I 7 8 g 80 STA  % POWER OTHER STATUS I . RY DISCOVERY DESCRIPTION 1 5 W @ l1l0l0lh! NA l [,Dj@lSurveillancetest. l AfTivlTY CO TENT AMOUNT OF ACTivlTY LOCATION OF RELEASE 1 6 RELEASE

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