ML20127K478

Forwards Review of Geologic & Hydrologic Aspects of License Application of Util Plant Site in Response to Eg Case Request

ML20127K478
Person / Time
Site:	Monticello
Issue date:	04/03/1967
From:	Blake A US ATOMIC ENERGY COMMISSION (AEC)
To:	Price H US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20127K460	List: ML20127K458 ML20127K478 ML20127K486
References
NUDOCS 9211200414
Download: ML20127K478 (2)

Text

. . . _ _ . _ -

E 2 2 1 April 3,1967 Mr. Harold L. Price Director of Regulation U. S. Atomic Energy Commission h915 St. Elmo Avenue Bethesda, Maryland 20545 Dear Mr. Price Transmitted berewith, in response to the request of Mr. Edson G. Case, is a review of the geologic and hydrologic aspects of the license application of the Northern States Power Company, Monticello Nuclear Generating Plant site.

This review prepared by Henry W. Coulter and Eric L. Meyer of the Geological Survey has been discussed with members of your staff and we have no objections to your making it a part of the public record.

Sincerely yours, 1

l /s/

. , ~ ,

l Arthur A. Blake Acting Director i

Enclosure:

S 9 E 1 9211200414 670405 PDR ADOCK 05000263 0 PDR

g 0,, f 1 Northern titates Power Company Monticello Nuclear Generating Plant, Minnesota 10fDROIOGY The site is located on a bluff on the right bank of the Mississippi River, nbout 4 miles upstream from Monticello, Minnesota. The reactor grnde altitude has been set at 935 feet above mean cea level, and critical equipment is the cooling water intake structure is to be floodproofed to a stage of 930 feet. This appears to be vell above the maximum probable flood stage to be expected at the site.

Minimum flow in this reach of the river since about 1915 has been about 250 cubic feet per second, more than an order of magnitude higher than the service water requirem nt for safe shutdown.

GEOLOGY The analysis of the geology of the Monticello Nuclear Generating Plant site presented in Atomic Energy Commission Docket (50-263 and supplements) was reviewed and compared with the available literature.

There are no identifiable geologic structures which could be expected

! to localize earthquakes in the immediate vicinity of the plant.

Location of the massive reinforced concrete intake structure anchored l to bedrock footings between the plant and the river bank, as abovn on Fisc. 8. 1-2 and 8. 1-3, Amende nt 6, should obviate potential problems resulting from sudden slope failures or undercutting by the river in that area.

l l

l p

_C _0 _ Y_

l

\

.a . -