ML20090F246

Telecopy Ro:On 830531,auto & Manual Indication Lights for FIC-0737A & HIC-0737A (Controllers for CV-0737A-auxiliary Feedwater) Discovered Out.Caused by Blown Fuse in Control Circuitry

ML20090F246
Person / Time
Site:	Palisades
Issue date:	06/23/1983
From:	Krich R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 8307050142
Download: ML20090F246 (2)

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l THIS CONFIRMS PROMPT NOTIFICATION OF AN OCCURRENCE REPORTABLE PER T.S. 6.9.2.A.2. AT 2320 ON MAY 31, 1983, A CONTROL ROOM OPERATOR OBSERVED THAT THE "AUT0" AND " MANUAL" INDICATION LIGHTS FOR FIC-0737A AND HIC-0737A (CONTROLLERS FOR CV-0737A - AUXILIARY 1

FEEDWATER CV FOR "A" S/C) WERE OUT. IMMEDIATE INVESTIGATION INTO

,THE PROBLEM WITH THE INDICATING LIGHTS DETERMINED THE CAUSE TO BE A BLOWN FUSE IN THE CONTROL CIRCUITRY. ON JUNE 22, 1983, IT WAS DISCOVERED THAT THE BLOWN FUSE WOULD ALSO PRECLUDE AUTOMATIC AND MANUAL CONTROL OF CV-0737A. WITH THE FUSE BLOWN, CV-0737A FAILED FULL OPEN PER DESIGN. THE RESULTANT MISMATCH IN CONTROL VALVE

- POSITION BETWEEN CV-0737A AND CV-0736A CREATED THE POTENTIAL INABILITY TO ADEQUATELY FEED THE "B" STEAM GENERATOR WITH THE AUXILIARY FEED PUMPS. -

THE REQUIREMENTS OF T.S. 3.5 WERE EXCEEDED UNTIL THE FUSE WAS REPLACED AND MANUAL CONTROL WAS ESTABLISHED WITH AN OPERATOR STATIONED IN RADIO CONTACT WITH THE CONTROL ROOM.

NOTIFICATION TO THE NRC RESIDENT INSPECTOR WAS MADE ON JUNE 22, 1983 P

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