ML19344F004
| ML19344F004 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 08/27/1980 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Mcdonald R ALABAMA POWER CO. |
| References | |
| NUDOCS 8009120251 | |
| Download: ML19344F004 (1) | |
Text
.
UNITED STATES
+
E NUCLEAR REGULATORY COMMISSION O
,E REGION 11 4
101 MARIETTA ST N.W., SUITE 3100 ATLANTA, G EORGIA 30303 AUG 2 71980 In Reply Refer To:
RII:JP0' STi-348
)
50-364,-
Alabama Power Company ATTN:
R. P. Mcdonald Vice President-Nuclear Generation P. O. Box 2641 Birmingham, AL 35291 Gentlemen:
This Information Notice is provided as a notification of a matter of possible safety significance. It is expected that recipients will review the information for possible applicability to their facilities, and where applicable, consider the recommended action. If you have questions regarding this matter, please contact the director of this office.
Sincerely, w h (9 J es P. O'Reilly Di ctor
Enclosures:
1.
IE Information Notice No.
- 1 2.
List of Recently Issued IE Information Notices cc w/ encl:
A. R. Barton, Executive Vice President F. L. Clayton, Jr., Senior Vice President H. O. Thrash, Manager-Nuclear Generation O. D. Kingsley, Jr., Manager, Nuclear Engineering and Technical Services J. W. McGowan, Manager-0parations Quality Assurance W. G. Hairston, III, Plant Mat.ager W. C. Petty, Manager-Quality Assurance (Design and Construction)
R. E. Hollands, Jr., QA Supervisor 800912025/
r O
SSINS No.: 6870 Accession No.
8006190040 IN 80-31 UNITED STATES NGCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C. 20555 August 27, 1980 IE Information Notice No. 80-31: MALOPERATION OF GOULD-BROWN BOVERI 480 VOLT-TYPE F-600S AND K-DON 600S CIRCUIT BREAKERS Description of Circumstances:
The Cincinnati Gas & Electric Company reported problems with the Gould-Brown Boveri Type K-600S and K-DON 600S 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 closure 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 readou ena holders of construction pern.its should be aware of the potential pr<blems 6.._ribed 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 the following actions be taken:
l (1) Detennine 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-600S and K-DON 600S, 480-volt a.c. electrically operated, drawout type with static trip device.
(2) If it is determined that your facility has the circuit breakers described l
in Item (1) above, perform the K-600S, K-DON 600S Field Test Procedure I
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 i action described in the attache 0.050 shim to the secondary clo DUPLICATE DOCUMENT Entire document previously entered into system under:
RO& lQDOLJC ANO N o. of pages: