ML19254C997
| ML19254C997 | |
| Person / Time | |
|---|---|
| Site: | Kewaunee, Point Beach, Prairie Island  |
| Issue date: | 09/13/1979 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | Mayer L NORTHERN STATES POWER CO. |
| Shared Package | |
| ML19254C998 | List: |
| References | |
| NUDOCS 7910190266 | |
| Download: ML19254C997 (2) | |
Text
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- s September 13, 1979 Docket Nos. 50-282 and 50-306 Mr. L. O. Mayer, Manager Nuclear Support ServMes Northern States Power Company 414 Nicollet Mall - 8th Floor Minneapolis, Minnesota 55401
Dear Mr. Mayer:
As part of our generic review of secondary system flow instabilities at nuclear power plants, we have reviewed your submittals dated September 2, 1975, January 29, 1976, and December 30, 1977, for Prairie Island, Unit Nos. 1 and 2 and plant operating data.
We have concluded that water hamer events due to the rapid condensation of steam in the feedwater systems at Prairie Island, Unit Nos. I and 2 is not likely to occur during normal operation or as a result of transient or accident conditions. Therefore, no modifications are necessary at the present time. However, we will continue to monitor your operating reports for indications of water hammer and will reexamine this matter if such indications appear.
Enclosed is our Safety Evaluation that addresses your facility and other facilities with a similar arrangement of main feedwater piping.
Sincerely,
! ftdft/6%
7 A. Schwencer, Chief-Operating Reactors Branch #1 Division of Operating Reactors Enclosure cc: w/ enclosure See next page 1190 024 7910190 O b b f
Mr. L. O. fiayer Northern States Power Company Gerald Charnoff, Esquire cc:
Shaw, Pittman, Potts and Trowbridge 1800 M Street, N.W.
Washington, D. C.
20036 Sandra S. Gardebring Executive Director Minnesota Pollution Control Agency 1935 W. County Road 82 Roseville, Minnesota 55113 The Environmental Conservation Library Minneapolis Public Library 300 Nicollet Mall Minneapolis, Minnesota 55401 Mr. F. P. Tierney, Plant Manager Prairie Island Nuclear Generating Plant Northern States Power Company Route 2 Welch, Minnesota 55089 Jcclyn F. Olson, Esquire Special Assistant Attorney General Minnesota Pollution Control Agency 1935 W. County Road 82 Roseville, Minnesota 55113 Robert L. Nybo, Jr., Chairman Minnesota-Wisconsin Soundary Area Commission 619 Secona Street Hudson, Wisconsin 54016 Clarence D. Fierabend U. S. Nuclear Regulatory Commission P. O. Box 374 Red Wing, Minnesota 550o6 9
1190 0215