ML20023C424
| ML20023C424 | |
| Person / Time | |
|---|---|
| Site: | Kewaunee  |
| Issue date: | 05/06/1983 |
| From: | Giesler C WISCONSIN PUBLIC SERVICE CORP. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| CON-NRC-83-100 NUDOCS 8305170323 | |
| Download: ML20023C424 (2) | |
Text
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d NRC-83-100 WISCONSIN PUBLIC SERVICE CORPORATION P.O. Box 1200, Green Bay, Wisconsin 54305 l
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May 6, 1983 Mr. J. G. Keppler, Regional Administrator I
Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137
Dear Mr. Keppler:
Docket 50-305 Operating License DPR-43 Kewaunee Nuclear Power Plant Equipment Failure of the Seismic Monitoring System y
The attachment provides a description of an equipment failure which was detected on April 8, 1983 while performing surveillance tests of the seismic monitoring system. The failure is not a reportable occurrence per Technical Specifications or NRC criteria, and does not affect public safety or plant operation. However, WPSC has determined that the failure is significant enough to inform you.
Very truly yours,
[M... E, C. W. Giesler Vice President - Nuclear Power js Attach.
cc - Mr. Robert Nelson, US NRC Mr. S. A. Varga, US NRC Y
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3305170323 830506 DR ADOCK 050003o MAY 9 1983 w
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Attachment to May 6,1983 Letter From C. W. Giesler to J. G. Keppler Surveillance testing of the seismic monitoring system on April 8, 1983 revealed that the transverse motion sensor on one of three triaxial accelero-meters has failed. The sensor provides no alarm or control function, but is used to measure and record transverse motion at the floor of the Auxiliary Building (elevation 657') in the event of a seismic occurrence. The vertical and horizontal acceleration sensors have remained operable.
In addition, transverse motion indications are available from the accelerometers located on the Containment Building slab (elevation 592') and on the Containment Building refueling floor (elevation 649').
The sensor is both unrepairable and obsolete.
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The seismic monitoring system is scheduled to be upgraded during the 1983-84 budget year.
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