ML20028C165

LER 82-024/03L-0:on 821123,diesel Generator D1 Inoperable for Approx 4 Minutes After Lockout of Engine Shutdown Circuit Occurred.Probably Caused by Sticky Action of Speed Switch.Further Exam of Circuitry Will Be Performed

ML20028C165
Person / Time
Site:	Prairie Island
Issue date:	12/22/1982
From:	Hunstad A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20028C159	List: ML20028C158 ML20028C165
References
LER-82-024-03L, LER-82-24-3L, NUDOCS 8301070138
Download: ML20028C165 (1)

Text

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h l o [ a l l During surveillance test, af ter D1 Diesel Generator had been shut down, a lockout of I t

o 3 l the engine shutdown circuit occurred, making the engine inoperable for about four 1 i

g o l4 ; l minutes. Not repetitive. Tech Spec 3.7.A.5 applies. No effect on public health and I o s g safety since redundant equipment was operable. l 10 is i I I lo171I I 10181 l l 7 8 9 80 DE CODE SU8C E COMPONENT CODE SU8 CODE SU E o 9 8

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42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h M lMos t probable cause is sticky action of the speed switch. but the occurrence could 1 i i l not be duplicated in subsequent test runs. Further examination of the shutdown 1

, 7 l dircuitry will be done. l EI I Li_LLj l l 7 8 9 80 ST S  % POWER OTHER$7ATUS DISCOV RY DISCOVERY OESCRiPTION i 5 [E_j@ l1 l0 l0 l@l NA l W @l* Surveillance test l AEriviTY Co'0 TENT RELE ASED OF RELE A'it AMOUNT oF ACTIVITY LOCATION OF RELEASE i n W @ l ' Zl@l NA l l NA l PeRSoNNEt ExPOSuEES NuusER TvPE DESCRIPTION h i 7 l0 l 0 l 0 l@l Z l@l NA l

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NAvr or PRFPARFR A. A. Hunstad pgny, 612-388- 1121