ML20070F318
| ML20070F318 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 12/09/1982 |
| From: | Koester G KANSAS GAS & ELECTRIC CO. |
| To: | Seidle W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, KMLNRC-82-257, NUDOCS 8212210115 | |
| Download: ML20070F318 (2) | |
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4 KANSAS GAS AND ELECTRIC COMPANY THE ELECTdtC CCMMNY GLENN L KOESTER wCE possiotesT < NuCLEam December 9, 1982 "r. W.C. Seidle, Chief Rusctor Projects Branch 2 U.S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 9
KMLNRC 82-257 Re:
Docket No. STN 50-482 Subj: Final 10CFR50.55 (e)/10CFR21 Report -
GE AKR Breakers
Dear Mr. Seidle:
This letter is the final report submitted pursuant to 10CFR50.55(c) and 10CFR21 concerning a deficiency in General Electric lE 480 volt AKR 30/50 Breakers. The deficiency was discovered at Wolf Creek Gen-erating Station on November 8,1982, and subsequently reported by Mr. Gene Rathbun of Kansas Gas and Electric Company (KG&E) to Mr. Bill Johnson of the Nuclear Regulatory Commission (Region IV) on November 9,1982, by telephone.
The deficiency involves the lever on the closing spring interlock.
The IcVer has a smooth, rounded end which can overtravel the armature linkage pin. The lever can then jam and cause the spring interlock mechanism to bend. Eventually the mechanism may bend sufficiently to cause the breaker to fail. These breakers are used in safety-related equipment and, therefore, failure could adversely affect the safety of operations of the plant. To this date the described deficiency has not resulted in any actual breaker failures at the Wolf Creek Generating Station.
Union Electric has reported AKR breaker problems due to this deficiency at their Callaway Unit 1 plant. KG&E has no information concerning any other facilities that may have received breakers with the same deficiency.
Kansas Gas and Electric Company will replace the deficient closing spring lever in all General Electric 480 volt AKR 30/50 Breakers. The replace-ment closing spring interlock levers will be furnished by General Electric and will have an " car" on the end to preclude the closing spring inter-lock lever from overtraveling the armature linkage pin.
8212210115 821209 PDR ADOCK 05000482 S
PDR 201 N. Market - Wichita, Kansas - Mail Address: PO. Box 208 I Wictuta, Kansas 67201 - Telephone: Area Code (3!6) 261-6451
Mr. W.C. Seidle f
KMLNRC 82-257 December 9, 1992 l
l
%e schedule for comp?etion is dependent upon delivery of the replace-ment parts from General Electric and working the replacement effort into the ongoing construction activities. In any event, replacement will be conpleted prior to fuel load. If you require additional infor-mation concerning this subject, please contact me or Mr. Otto Maynard of my staff.
Yours very truly,
$fd GLK:bb cc: TVandel/SSchum l
J
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