ML19351D153

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Responds to IE Bulletin 80-20, Failures of Westinghouse Type W-2 Spring Return to Neutral Control Switches.Switches Are Not Used in safety-related Applications,Only for Testing While Breaker Is in Test Position
ML19351D153
Person / Time
Site: Clinton  Constellation icon.png
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

nc j 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 Inspection, Washington, D.C. 6EP 2 2 @

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