ML20028B599

LER 82-033/03L-0:on 821031,during Water Pump Test,Speed Switch XES-2003A Failed in Midposition During Fast to Slow Speed Transfer,Rendering Svc Water Train a Inoperable.Caused by Bad Relay Contact on Speed Switch.Relay Repaired

ML20028B599
Person / Time
Site:	Summer
Issue date:	11/29/1982
From:	Mckinney C SOUTH CAROLINA ELECTRIC & GAS CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20028B596	List: ML20028B595 ML20028B599
References
LER-82-033-03L, LER-82-33-3L, NUDOCS 8212030064
Download: ML20028B599 (1)

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o2 l During the performance of Service Water Pump Test on October 31, 1982, with the l l o l3 l l Plant in Mode 4, Speed Switch (XES-2003A) failed in mid-position during fast to l l o l4 l I slow speed transfer rendering Service Water Train "A" inoperable. There were l l o l5 l l no adverse consequences as Service Water and ECCS Train "B" remained operable. l IoIeiI I IoI7IL I lolBil ' **

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(( l The event is attributed to a bad relav contact on Sneed Switch (XES-2003A). I l i li l [jipeed Switch XES-2003A was manually shifted to fast speed and Service Water I l 1 l 2 l l Pump "A" started within 15 minutes. Speed Switch Relay repair was performed l l i l a l 1 upon completion of Service Water Pump "C" alignment to Train "A". Speed Switch l g4j l Relay inspection added to Statien Preventive Maintenance Program. [

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NAME OF PREPARER . ,. /D - PHONE: (803) 345-5209 C. f. McKinnev /