ML20023B439

LER 83-033/03L-0:on 830331,while in Mode 5,source Range Detectors N-31 & N-32 Lost for Approx 5 Minutes.Caused by Maint Personnel Error in Placing Trains of Solid State Protection Sys in Wrong Position.Personnel Cautioned

ML20023B439
Person / Time
Site:	Summer
Issue date:	04/29/1983
From:	Fields H SOUTH CAROLINA ELECTRIC & GAS CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20023B436	List: ML20023B435 ML20023B439
References
LER-83-033-03L, LER-83-33-3L, NUDOCS 8305050061
Download: ML20023B439 (1)

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EVENT DESCRIPTION AND PROBABLE CONSEQUEN'CES h10 l o l2 l lOn March 31, 1983, with the Plant in mode 5, both source carge detectors (N-31 and l

o ;3 ; lN-32) were lost for approximately rive (5) minutes. 'Ibe potenttial for adverse  ;

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CAUSE OESCRIP1 TON AND CORRECTIVE ACTIONS h l 1 l a l Maintenance personnel placed aoth trains of the Solid 3 tate Protectiori Systen j l 1 l 1 l l(SSPS) in the ' INHIBIT" position. This condition de-energizes both source range l l 1 l 2 l l detectors per SSPS circuitry design. Train "A" of the SSPS was pronptly placed l l , l 3 l lin the nonnal position, which returned power to the detectors. Maintenance l 1

l l 3 l 4 l l personnel were cautioned. 'Ihe procedure will be clarified to prevent recurrence. l

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