ML20095C366
| ML20095C366 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 08/07/1984 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| (RDC-109(84)), NUDOCS 8408220498 | |
| Download: ML20095C366 (2) | |
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P.o. BOX 5000 - CLEVELAND OHIO 44101 - TELEPHONE (216) 622-9800 - lLLUMINATING BLDG. - 55 PUBLIC SQUARE Serving The Best Location in the Nation MURRAY R. EDELMAN VICE PRESIDENT NUCLE A R Mr. James G. Keppler Regior.a1 Administrator, Region III Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 RE:
Perry Nuclear Power Plant Docket Nos. 50-440; 50-441 Condition of Div. 1 Class 1E Bus During a Loss of Offsite Power [PWC 109(84)]
Dear Mr. Keppler:
This letter is the final report pursuant to 10CFR50.55(e) on the significant deficiency concerning Division 1 diesel generator operation during a loss of offsite power.
Mr. R. Knop of your office was first notified on July 9,1984, by Mr. T. A. Boss of The Cleveland Electric Illuminating Company (CEI) that this problem was being evaluated. This discrepancy was identified during a safety system functional capability review performed for CEI by GDS Associates.
This report contains a description of the deficiency, analysis of safety implications and the corrective action to be implemented.
Description of Deficiency Generator control for the local / remote control switch utilizes ccntacts 15a-15 to trip the preferred supply breaker. These contacts are open in the " remote" position and closed in the " local" position per drawing B208-206, Sh. 27.
This prevents the circuit breaker from tripping when desired (during loss of bus voltage).
If the contacts are open in the remote position, loss of bus voltage will not trip the preferred supply breaker.
If this breaker is not open, the Division 1 diesel generator will start but will not connect to the bus.
Analysis of Safety Implications In the event of a total loss of of fsite power, on-site diesel generators are provided to supply electric power to equipment essential for a safe shutdown..
If the Division 1 diesel generator is not connected to the bus, this would result in loss of power to Division 1 safety systems.
8408220498 840807 PDR ADOCK 05000440 S
PDR AUG 101984pb[
2-August 7, 1984 a-Mr. James G. Kepplar Corrective Action
_' Gilbert / Commonwealth, Inc., the Architect / Engineer, has initiated Engineering Change Notices (ECNs) for Units 1 and 2 to effect a design change that will provide contacts that are closed in the " remote" position and open in the
" local" position. This will assure that Division 1. diesel generators will connect to the bus during loss of bus voltage.
Please calb if 'there are. additional questions.
Sincerely,
$titM/
1' Murray R Edelman Vice President Nuclear Group
-MRE:pab cc:
Mr. J. A. Crobe NRC Site Office Director Office of Inspection and Enforcement
.U.S. Nuclear Regulatory Commission
' Washington, D.C.
20555 U.S. Nuclear Regulatory Commission c/o Do'cument Management Branch Washington, D.C.
20555 Records Center, SLE-IN Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 b
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