ML20034F505
| ML20034F505 | |
| Person / Time | |
|---|---|
| Site: | University of Michigan |
| Issue date: | 02/25/1993 |
| From: | Burn R MICHIGAN, UNIV. OF, ANN ARBOR, MI |
| To: | Cox C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 9303030323 | |
| Download: ML20034F505 (1) | |
Text
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Nuclear Reactor Laboratory The University of Michigan Ford Suelear Reactor Phoenix Memorial Laboratory 2301 Bonisteel Boulevard j
February 25, 1993 Docket 50-2 License R-28 3
United States Nuct'-- Regulatory Commission Attn: Charles Cox 799 Roosevelt Road Glen Ellyn, Illinois 60137
Dear Mr. Cox:
This letter is to inform 7ou of a minor occurrence at the Ford i
Nuclear Reactor that was iot evaluated as a reportable occurrence in accordance with Technical Speell'ications.
On February 24, 1993, during a routine shutdwon margin and excess reactivity check following shim-safety and control rod calibrations, the shim-safety rod control switch failed.
The switch could not be placed in the insert position.
The reactor was just critical.
The reactor was shutdown by inserting the control rod and depressing the manual scram button to insert the shim-safety rods.
j The shim-safety rod control switch was removed, repaired, and tested satisfactorily.
Following a pre-startup checkout, the reactor was brought to power in the normal way to begin a ten-day cycle.
i Sincerely, t
/
Reed R.
Burn Manager xc:
United States Nuclear Regulatory Commission Document Control Desk Attn: Theodore S.
Michaels, Project Manager Standardization and Non-Power Reactor Project Directorate Division of Reactor Projects III, IV, V,
and Special Projects Office of Nuclear Reactor Regulation Washington, D.C.
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