ML20053D942
| ML20053D942 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 05/28/1982 |
| From: | Davidson D CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, RDC-55(82), NUDOCS 8206070461 | |
| Download: ML20053D942 (2) | |
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THE CLEVELAND ELECTRIC ILLUMIN ATING COMPANY P O Hon 5000 m CLEVELAND OHIO 44101 e T ELE PHONE (216) 622-9800 m ILLUMINATING BLDG e 55 PUBLIC SOUARE Serving The Best Location in the Nation Daiwyn R. Davidson oa onew Nr
%YS f f M f NGthtf H8NG AND CONSTHUCf.ON May 28, 1982 Mr. James G. Keppler Regional 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 Improper Nut / Gland Assembly for D.C. Motor Control Center
[RDC 55(82)]
Dear Mr. Keppler:
This letter serves as a final report pursuant to 10CFR50.55(e) concerning a deficiency in a D.C. Motor Control Center (MCC) supplied by Eaton Corporation Cutler-Hammer.
Initial notification that this problem was being evaluated by The Cleveland Electric Illuminating Company (CEI) was made to your office on April 30, 1982, by Mr. E. Riley of CEI.
This report includes a description of the deficiency, an analysis of safety implications, and the planned corrective action.
Description of Deficiency During a site inspection by Cutler-Hammer service personnel, a nut /giand assembly for 912 DC contact in MCC-ED2A08 was found not to be seismically qualified.
l Analysis of Safety Implications The operation of the nut / gland assembly maintains closure of electrical contacts during operation of the MCC.
Failure of this assembly during a seismic event could result in the loss of safety-related D.C.
loads affecting the Reactor Core Isolation Cooling System.
Failure of this assembly might also represent a fire hazard in the MCC due to potential arcing between open contacts.
8206070461 820528 2bdd PDR ADOCK 05000440 S
PDR L/ $
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f Mr. Jamea C. Keppler.May 28, 1982 Planned Corrective Action i
l Cutler-Itammer personnel conducted a 100% inspection of all D.C. MCC's, resulting
.in the identification of only one MCC with the unqualified nut / gland assembly.
l Cutler-ilammer will supply the proper assembly to the Perry Project, which shall be installed by site personnel.
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In addition to the investigation performed by Cutler-Hame.er, the Perry Project will j
conduct an independent investigation of other safety-related Motor Control Centers for this deficiency.
i The date for completion of this corrective action is November 1,1982.
If any changes result from the Perry Project investigation, a revision to this i
report.will be issued.
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Sincerel,
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/ ad Dalwyn R. Davidson Vice President System Engineering and Construction l
DRD/llp t
1 cc:
Mr. M. L. Gildner i
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 Document Management Branch Washington, D. C.
20555 1
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