ML19256E900
| ML19256E900 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 10/31/1979 |
| From: | Wachter L NORTHERN STATES POWER CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| IEB-79-24, NUDOCS 7911150518 | |
| Download: ML19256E900 (1) | |
Text
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MSP NOR7HERN STATES POWER COMPANY M IN N E A PO LI S MIP4 N E S OTA 55401 October 31, 1979 Mr. James G. Keppler Director - Region III Office of Inspection and Enforcement United States Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137
Dear Mr. Keppler:
PRAIRIE ISLAND NUCLEAR GENERATING PLANT Dockets No. 50-282 and No. 50-306 In response to IE Bulletin 79-24, the Prairie Island Nuclear Generating Plant, located near Red Wing, Minnesota, was designed for extremely cold winter weather as well as warm summer temperatures. All equipment is enclosed in protected structures.
Steam heat, hot water heat, or electric heat is provided for all structures.
Steam or hot water heat is supplied to the Turbine Building, Auxiliary Building, Radiation Waste Buildings, and Warehouses. Turbine extraction steam is the normal source of energy for steam and hot water heat. An independent heating boiler is available as a back-up source in the event both units are shutd wn in winter. The Screenhouse is provided with electric heat.
Electric heat tracing is used on boric acid lines. These lines are not affected by cold outdoor temperatures; however, some tanks located outside of main buildings are provided with independent steam or electric heating systems if necessary to prevent freezing or " thickening" of fluids.
Extremely cold winter weather is common at Prairie Island and has not caused frecz.ing problems with safety-related equipment.
Yours very truly, L. J. Wachter Vice President - Power Production and System Operation cc:
Mr. G. Charnoff 1335 360 wn no W