ML20023C446

LER 83-012/01T-0:on 830408,emergency Discharge Valve to Keowee Tailrace CCW-8 Opened W/O Command,Rendering Condenser Circulating Water Emergency Discharge Sys Inoperable.Caused by Shorted Conductor.Conductor Replaced

ML20023C446
Person / Time
Site:	Oconee
Issue date:	04/22/1983
From:	Petty J DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20023C426	List: ML20023C425 ML20023C446
References
LER-83-012-01T, LER-83-12-1T, NUDOCS 8305170338
Download: ML20023C446 (1)

Text

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6\ ENT oEScalPTloN AND PROBA8LE CONSEQUENCES h 1 o l2 l [ Jn April 8. 1983. the Emercencv Discharge Valve to the Koewee Tni1r,co. crwR _ l l j o ;3 ; j opened without command, losing emergency discharge prime, thus making the l j o j 4 l l Condenser Circulating Water (CCW) Emergency Discharge System inoperable. Durin);

l o l s l l this period, the CCW oumps had power and were providine cooline flow throuch l

o;o g the condensers. The probability of loss of all station power during this 43 l jol7ll minutes was low. Thus, the health and safety of the public were not affected l l o ! s [ [ by this incident. l

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[3.jh l Nih l Llh l Ll2 10 10 l CAUSE oESCRIPTION ANO CORRECTIVE ACTIONS b27 j i j o l l The cause was component malfunction. A short in the conductor caused CCW-8 to l l t l i l l open. The valve was manually closed and the system was reprimed. A power re- l

,g, jduction was initiated but later was deemed unnecessary. The shorted conductors;

[,;3jlwere replaced. The cables will be replaced. Future modifications will physi- l l i ; 4 l l cally protect the cables. ~

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NAME OF PREPARER PHONE:

8305170338 830422

( PDR ADOCK 05000269 S PDR t