ML19263F019

Responds to Suggestion Re Examination of Possible Flood Levels at Tmi.Level Sys Around Plant Designed for Flood Discharge.Emergency Operation Plans Will Allow Plant Shutdown for Floods Exceeding Design Limit

ML19263F019
Person / Time
Site:	Crane
Issue date:	10/27/1979
From:	Harold Denton Office of Nuclear Reactor Regulation
To:	Pluto J AFFILIATION NOT ASSIGNED
Shared Package
ML19263F020	List: ML19263F019 ML19263F021
References
NUDOCS 7911070248
Download: ML19263F019 (1)

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l Mr; Joseph A. Pfuto

'RVollmer 363 Paddock Drive We.-

SMiner-Savoy, IL 61674

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Dear Mr. Pluto:

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I apologize for not providing this response to you sooner but, as you are aware,

- 'the Comission and staff have been occupied with continued support of the efforts at Three Mlle Islano, orders to other facilities, appearances before the p

President's Comission and various committees of Congress that are investigating the Three Mile Island accident, and the realignment of our own resources and priorities to give immediate attention to the problems resulting from the accident.-

In your letter,.you suggest that we examine the possible flood levels at the Three Mile Island site. This matter was thoroughly reviewed during the operating license review for Three Mile Island. The levee system around the plant is designed for a flood discharge of 1,100,000 cubic feet of water past Three Mile Island. In addition, emergency operation plans will allow plant shutdown and i

maintenance of. safe shutdown for floods with a maximum discharge of 1,625,000 cubic feet per second. The analysis techniques used for these two flood discharges were also used on the June 1972 flood; this flood had a flood..

j discharge of 1,020,000 cubic feet per second. The analysis techniques predicted a water level that was 1.5 feet higher than actually occurred on Three Mile I

Island.

I Therefore, we conclude that the maximum flood levels used in the design are consfrvative.

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Sincerely,

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,pnginal signed by

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