ML20028E077

LER 82-058/03L-0:on 821214,urgent Failure Alarm Due to Loss of Power Occurred During Restoration of Rod Control Sys Upon Completion of Power Operational Testing.Caused by Oxidation Between Fuse & Fuse Block Mating Surfaces

ML20028E077
Person / Time
Site:	Summer
Issue date:	01/13/1983
From:	Mckinney C SOUTH CAROLINA ELECTRIC & GAS CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20028E070	List: ML20028E069 ML20028E077
References
LER-82-058-03L, LER-82-58-3L, NUDOCS 8301200329
Download: ML20028E077 (1)

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h l 0 l2 l lon December 14, 1982, with the Plant in Mode 1, an Urgent Failure Alarm occurred l l 013 l lduring the restoration of the Rod Control System upon completion of Power l l o l4 l l Operational Testing. Group 2 Rods of Control Bank B, D, and Shutdown Bank B l l o l5 l lwere inoperable due to loss of power. There were no adverse consequences since l lo ls l l the rods still retained the capability to trip durim a plant emergency. l l0l7ll l l

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[T]Tl lThe occurrence was due to oxidation between the fuse and fuse block mating l jijill surfaces. The fuse was cleaned and replaced in the fuse block. All rod movement l l i 12 l lwas normal af ter Phase A Gripper Voltage was re-es tab lished. Inspection of l

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