ML20132E299
| ML20132E299 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 07/05/1985 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-85, REF-PT21-85-330-000 (RDC-138(85)), PT21-85-330, PT21-85-330-000, NUDOCS 8507170671 | |
| Download: ML20132E299 (2) | |
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.s THE CLEVELAND ELECTRIC ILLUMIN ATING COMP ANY P.O. BOX 5000 - CLEVELAND. OHIO 44101 - TELEPHONE (216) 622-9800 - lLLUMINATING BLDG - 55 PUBLIC SQUARE Serving The Best Location in the Natan MURRAY R. EDELMAN vice eResiDeNT July 5, 1985 PY-CEI/OIE 0077 L NUCMAR
~ 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 No. 50-440; 50-441 BBC K-Line Breaker Overcurrent Trip Devices Model OD-4 and OD-5
[RDC 138(85)]
Dear Kr. Keppler:
This letter serves as the final report pursuant to 10CFR50.55(e) concerning the potentially significant deficiency with electro-mechanical trip devices manufactured by Brown Boveri, Inc.
This item was originally identified to Mr. F. Jablowski of your office on June 6, 1985 by Mr. P.
P. Martin of the Cleveland Electric Illuminating Company (CEI).
Brown Boveri, Inc. reported this condition to the NRC in accordance with 10CFR21 on May 3, 1985.
Descrii of Deficiency Brown Boveri, Inc. (BBC) notified CEI in a letter dated May 24, 1985, that their low voltage K-line DC circuit breakers equipped with electro-mechanical OD-4 and OD-5 trip devices may have an in-correct short time delay band lever (link).
The incorrect links were inadvertently installed by BBC between the. dates of October 1983 and March 1985.
These types of devices are used in Safety-Related Class lE 4.16 KV switchgear originally supplied to PNPP by BBC.
Analysis of Safety Implication The use of the incorrect link would cause the short time element of l
the overcurrent trip device to be inoperative in the maximum l
setting.
This malfunction could result in cable and/or equipment damage, in addition to the loss of selective tripping capabilities causing unnecessary shedding of unaffected essential safety-related 1
loads.
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5 Mr. Jznes G. Ksppler PY-CEI/OIE 0077 L July 5, 1985
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Corrective Action Project Organization conducted a review of items supplied by BBC during the specified time period.
Our investigation and subsequent inspection of both BBC supplied circuit breakers and lower mold assemblies identified seventeen (17) defective OD-4. trip devices in 4
Project Organization Warehouse.
The OD-5 model trip devices are not used at PNPP.
Nonconformance Report NDS-0127 was issued by i
Project. Organization to track the seventeen (17) defective trip devices which have been returned to BBC.
-Please call if there are any additional questions.
3 Sincerely, k
urray R. Edelman l
Vice President Nuclear Group MRE:sab i
cc:
.Mr. J. A. Grobe j
USNRC, Site Office f
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Mr. D. E. Keating USNRC, Site Office Director I
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555 I
U.S. Nuclear Regulatory Commission c/o Document Management Dranch Washington, D.C. 20555 Records Center, SEE-IN Institute of Nuclear Power Operations 1100 Circle, 75 Parkway,~ Suite 1500 Atlanta, Georgia 30339 i
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