ML19338D400
| ML19338D400 | |
| Person / Time | |
|---|---|
| Issue date: | 08/30/1980 |
| From: | Pappas H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Wright N ILLINOIS, STATE OF |
| References | |
| NUDOCS 8009230106 | |
| Download: ML19338D400 (2) | |
Text
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y na aeo UNITEJ STATES
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NUCLEAR REGULATORY COMMISSION n
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REGION 111
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799 ROOSEVELT ROAD GLEN ELLYN,lLLINOIS 60137
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IAUG 3 0 880 State of Illinois
' Department of Public Health ATTN:
Mr. Gary N. Wright, Chief Division of Nuclear Safety 535 West Jefferson Street-Springfield, IL 62761 Gentlemen:
The enclosed IE Information Notice No. 80-31 titled "Maloperation of Gould-Brown Boveri Type 480 Volt Type K-600S and K-DON 600S Circuit Breakers" was sent to the licensees listed below on August 27, 1980:
American Electric Power Service Corporation Indiana and Michigan Power Company D. C. Cook 1, 2 (50-315, 50-316)
Cincinnati Gas & Electric Company Zimmer (50-358)
Cleveland Electric Illuminating Company Perry 1, 2 (50-440, 50-441)
Commonwealth Edison company Braidwood 1, 2 (50-456, 50-457)
Byron 1, 2 (50-454, 50-455)
Dresden 1, 2, 3 (50-10, 50-237, 50-249) l LaSalle 1, 2 (50-373, 50-374)
Quad-Cities 1, 2 (50-254, 50-265)
Zion 1, 2 (50-295, 50-304)
Consumers Power Company Big Rock Point (50-155)
Midland 1, 2 (50-329, 50-330)
Palisades (50-255)
Dairyland Power Cooperative LACBWR (50-409)
Detroit Edison Company Fermi 2 (50-341)
. Illinois' Power Company Clinton 1, 2 (50-461, 50-462) 8 00928 o g 46_-
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-State of' Illinois.
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Iowa Electric Light:& Power Company
.Duane Arnold (50-331):
Northern -Indiana Public Service Company Bailly (50-367)
Northern States Power. company Monticello:(50-263)
.PrairieLIsland 1, 2-(50-282, 50-306)
Public Service of Indiana Marble, Hill 1, 2 (50-546, 50-547)
. Toledo' Edison Company Davis-Besse 1 (50-346)
Union Electric Company:
Callaway 1,'2'(50-483, 50-486)
Wisconsin Electric Power Company Point Beach 1, 2.(50-266, 50-301)
Wisconsin Public Service Corporation Kewaunee-(50-305)
Sincerely, l
e en.Papp s, Chie Administr tive Branch
Enclosure:
IE Information Notice No. 80-23 cc w/ enc 1:
JMr. D. W.-Kane, Sargent & Lundy Central Files iReproduction Unit NRC 20b-AEOD-
' Resident Inspectors, RIII JLocal'PDR NSICL TIC E
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SSINS No.: 6870 Accession No.:
8006190040 IN 80-31 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT 4
WASHINGTON, D.C. 20555 August 27, 1980 IE Information Notice No. 80-31:
MALOPERATION OF GOULD-BROWN BOVERI 480 i
VOLT-TYPE K-6005 AND K-DCN 6005 CIRCUIT BREAKERS Description of Circumstances:
The Cincinnati Gas & Electric Company reported problems with the Gould-Brown Boveri Type K-6005 and K-DON 6005 circuit breakers used in 480 volt a.c.
circuits at the William H. Zimmer nuclear stations.
The problem involved inadvertent circuit breaker closure during operation of the breaker charging springs when the breaker was racked out to the test position.
The problem resulted from the use of undersized bushings in the circuit breaker secondary close latches.
The undersized bushings caused the secondary close latch to hang-up on the shunt trip device resulting in an inadvertent circuit breaker elosure when the spring charging motor was energized.
The vendor has stated that the problem does not exist during normal operations with the circuit breaker in the connected position.
Recommended Action for Licensees and Holders of Construction Permits:
All licensees of operating nuclear power reactors and holders of construction permits should be aware of the potential problems described above.
The vendor has stated that a small number of circuit breakers were assembled with under-sized secondary latch bushings between 1969 and 1977.
It is recommended that i
the following actions be taken:
(1) Determine if the subject circuit breakers are installed in any safety-related application at your facility.
The affected circuit breakers are manufactured by Gould-Brown Boveri and are types K-6005 and K-DON 6005, 480-volt a.c. electrically operated, drawout type with static trip device.
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(2)
If it is determined that your facility has the circuit breakers described-in Item (1) above, perform the K-6005, K-DON 6005 Field Test Procedure attached to this information notice (Gould-Brown Boveri I.B.-9.1.7-6 Issue F, Addendum 2, dated March 4, 1980).
l (3)
If maloperation of the circuit breaker occurs during performance of the field test procedure described in Item (2) above, perform the corrective est procedure (installation of a DUPLICAT3 DOCUMENT Entire document previously entered into system under:
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