ML19332B155

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Responds to IE Bulletin 80-19 & Revision 1, Failures of Mercury-Wetted Matrix Relays in Reactor Protective Sys of Operating Nuclear Power Plants Designed by C-E. Relays Not Utilized in Reactor Protective Sys of Facility
ML19332B155
Person / Time
Site: Zimmer
Issue date: 09/02/1980
From: Borgmann E
CINCINNATI GAS & ELECTRIC CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
IEB-80-19, NUDOCS 8009260137
Download: ML19332B155 (1)


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THE CINCINNATI GAS & ELECTRIC COMPANY b- ~

CINCINN ATI. OHIO 45201

c. ..onouxun SePterber 2, 1980 SENice veCE PAE&lDENT United States Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Attention: Mr. James G. Keppler, Regional Director RE: WM. 11 . ZIMMER NUCLEAR POWER STATION UNIT 1 - IE BULLETIN 80-19 and REV. 1 FAILURE OF MERCURY WETTED RELAYS IN RPS SYSTEMS, DOCKET #50-358, W.O. 57300, JOB E-5590, ITEM #956, IE BULLETIN FILE Gentlemen:

Mercury wetted relays are not utilized in the Reactor Protection System at the Wm. H. Zimmer Nuclear ,

Power Station - Unit 1. IE Bulletin 80-19 is therefore  !

not applicable to this facility and no further response 1 l

is required.

l With regards to the question raised in your l

cover letter of July 31, 1980, please be advised that between ourselves and our supplier we expended approximately four manhours to investigate the status of mercury wetted relays on the Zimmer facility.

Very truly yours, THE CINCINNATI GAS & ELECTRIC COMPANY l By -

E. A. Borgmann WPC:mjl cc: NRC Office of Inspection and Enforcement R. F. Scheibel R. E. Cotta <

C. W. Beringhaus 11 . C. Brinkmann SEP 5 1980 W. W. Schwiers i" I B. K. Culver J. R. Schott J. D. Flynn F. T. Daniels W. D. Waymire (Pink) SEP 5 s3 sooosso 137