ML20092C532
| ML20092C532 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 06/08/1984 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| (RDC-107(84)), NUDOCS 8406210228 | |
| Download: ML20092C532 (2) | |
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tP.o. box 5000 - CLEVELAND
- 55 PUBLIC SoUARE n-4 L
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i si Serving The Best Location in the Nation MURRAY R. EDELMAN VICE PRESIDENT NUCLE AR 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 Deficiency in Two Class 1E 125 Volt DC Motor Control Centers
[RDC 107(84)]
Dear Mr. Keppler:
This letter serves as our final report pursuant to 10CFR50.55(e) concerning the lack of rear bracing panels in several vertical sections of two Class 1E 125 volt, direct current motor control centers (MCCo) furnished by Eaton Corpora tion. Our evaluation per DAR 185 of this condition was first reported by Mr. P. Martin of The Cleveland Electric Illuminating Company to Mr. McCormick-Barger of your Region III office on May 8, 1984.
This report contains a description of the deficiency, an analysis of safety implication and the planned course of action for completion of our evaluation for significance.
Description of Deficiency Eaton Corporation supplied thirty-one (31) Class 1E 125 volt DC and 480 volt AC Motor Control Centers to the Perry Nuclear Power Plant (PNPP), Units 1 and 2.
On April 27, 1984 Eaton Corporation informed PNPP via a letter that there was a possibility that several MCCs built at their Chicago Plant in 1981 were shipped omitting the bolted rear bracing panel, and requested that we inspect all McCs for this panel. On May 3, 1984, an on-site inspection of all Class 1E MCCs was conducted to deternine if a rear bracing panel had been installed by Eaton Corporation in accordance with their letter.
Two MCCs, 1R42S0015 and 2R4250015, were found to be lacking the bracing panel in six vertical sections of each MCC.
The remaining twenty-nine (29) MCCs were found to have the panel in all their sections.
Analysis of Safety Implication The rear bracing panels in the two 125 volt DC MCCs are provided to ensure their integrity during a seismic event.
Failure of either MCC would render various Class 1E 125 volt loads, such as station batteries, their associated chargers and switchboards as inoperative.
8406210228 840608 PDR ADOCK 05000440 M N 1 4 1984 qf s
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-Mr. Jones G. Ksppler Juna 8, 1984 Corrective Action Nonconformance Reports OQC 823 and 0QC 824 were issued as a result of the PNPP inspection. Eaton Corporation has supplied a rework procedure, and PNPP will a
perform the installation of these bracing panels under the supervision of Eaton Corporation personnel.
It is presently expected that this will be completed by July 27, 1984.
Please call if there are any additional questions.
Sincerely,
^: = Y Murray R. Edelman Vice President Nuclear Group MRE:pab cc: Mr. J. A. Grobe 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 Records Center, SEE-IN Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500
- Atlanta, Georgia 30339 4
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