ML19351D153
| ML19351D153 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 09/16/1980 |
| From: | Wuller G ILLINOIS POWER CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| IEB-80-20, L08-80L09-16)-0, U-0183, NUDOCS 8010090098 | |
| Download: ML19351D153 (1) | |
Text
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U-0183 ILLINOIS POWER COMPANY tog _gogn9_tsy_o 500 SOUTH 27TH STREET. DECATUR, ILLINOIS 62525 September 16, 1980 Mr. James G. Keppler Director, Region III Office of Inspection & Enforcement U.S. Nuclear Regulatory Commission 799. Roosevelt Road Glen Ellyn, Illinois 60137
Dear Mr. Keppler:
Clinton Power Station Units 1 & 2 Docket Nos. 50-461 and 50-462 Construction Permits No. CPPR-137 & CPPR-138 This is in reply to your letter of July 31, 1980, whereby you forwarded IE Bulletin No. 80-20 which reported on the failure of Westinghouse Type W-2 control switches with spring return to neutral position.
Illinois Power has reviewed all safety related systems and find that Westinghouse Type W-2 switches are supplied on all class lE 4160V and 6900V circuit breakers.
These switches are used for breaker testing while the breaker is in the " TEST" position.
While the breaker is in the " TEST" position, a
" Service Not Available" alarm and status light is annunciated in the main control room from an auxiliary relay which is input from breaker " TOC" switches, which indicate whether or not the breaker is in the connected position.
When the breaker is in the connected position, the control switches are-bypassed.
Furthermore, neutral contacts, like those alluded to in Bulletin 80-20, are not used at all.
Therefore, in response to item 1 of the Bulletin, none of these switches are used in safety related applications; only for testing while the breaker is in the " TEST" position.
Items 2 and 3 are not applicable to Clinton.
Sincerely,
",/
G. E. Wuller Supervisor-Licensing Nuclear Station Engineering JPO' B : rj cc:
CPS /DRC H. H. Livermore, NRC Resident Inspector Office of I&E, Division of Reactor Construction 6EP 2 2 @
Inspection, Washington, D.C.
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