ML19319D326

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Forwards Review of Geologic & Hydrologic Aspects of Proposed Facility in Response to Rs Boyd Request
ML19319D326
Person / Time
Site: Crystal River, 05000303  Duke Energy icon.png
Issue date: 04/02/1968
From:
INTERIOR, DEPT. OF, FISH & WILDLIFE SERVICE
To: Price H
US ATOMIC ENERGY COMMISSION (AEC)
References
NUDOCS 8003130982
Download: ML19319D326 (3)


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DEPARTMENT OF THE INTERIOR

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. GEOLOGICAL SURVEY

"' WASHINGTON, D.C. 20242 APR 2 1968 Mr. Harold L. Price Director of Regulation U. S. Atomic Energy Commission 4915 St. Elmo Avenue Bethesda, Maryland 20545

Dear Mr. Price:

Transmitted herewith in response to a request by Mr. Roger S. Boyd,

.'.s a review of geologic and hydrologic aspects of the Crystal River Unit 3 near Citrus County, Florida, proposed by the Florida Power Corporation for location of a nuclear powered thermal electric station.

The review was prepared by H. H. Waldron and E.L. Meyer and has been discussed with members of your staff. We have no objections to your

making this review a part of the public record.

Sincerely yours,

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Crystal River Unit 3 Citrus County, Florida AEC Docket 50-302 Hydrology The site is located on the shore of the Gulf of Mexico between the Crystal River and the Withlacoochee River, about 70 miles north of Ta=pa, Florida.

The unit will draw cooling water for steam condensors from the Gulf at a rate of 2,000 cubic feet per second. The intake and discharge canals extend for some distance offshore into Crystal Bay which is shallow, ranging from 2 to 6 feet in depth and is dotted with reefs. The mean tidal range in the Bay varies from about 2 to 3 feet.

Hurricane-tides will present the critical flood problem at the site. The flood protection design level is to be based on the maximum probable hurricane tides and wave run up.

Ground-water levels near the coast would be expected to slope towards the shore, and ground-water runoff would be towards the Gulf. Spills of radioactive liquids at or near the site could be expected to discharge through the ground into the Gulf.

The reactor at 'this location is not likely to affect the fresh water resources of the area.

Geology The analysis of the geology of the Crystal River Nuclear Generating Flant in Florida, as presented in AEC Dockets 50-302, and -303 and supplements, was reviewed and co= pared with the available literature; foundation conditions and proposed treatment of the foundation were reviewed at the site on February 14 and 15, 1968. The analysis appears to be carefully derived and to present an adequate appraisal of those aspects of the geology that would be pertinent to an engineering evaluation of the site.

There are no positively identifiable active faults or other recent geologic structures that could be expected to localize earthquakes in the irr.ediate vicinity _ of the site.

Tectonically the site is located on the western flank of the Ocala uplift, which is the dominant subsurface structural element in the western part of the northern peninsular structural province of Florida. Although several faults are associated with, and essentially parallel to, this northvest-trending enticlinal fold, all available evidence indicates that the structure has not been tectonically active since late Tertiary times.

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Foundation rock at the site is a granular, clastic limestone (the Inglis Limestone Member of the Moodys Branch Fomation)that is characterized

-by solution cavities and by major zones of friable, poorly cemented rock.

The applicant is aware of t..e problems involved with such a foundation material and recognizes the i.eed for a suitable and carefully controlled treatment of the limestone in order to assure the integrity of the rock as a foundation material.

Treatment of the foundation rock, as proposed, vill be accomplished by means of curtain and consolidation grouting to specified minimum teminal unit takes of grout, utilizing the split-spacing and stage-grouting techniques. By this method of treatment, the existence of any large cavities in the limestone that underlies the plant structure should be precluded, and resulting grout-stabilized rock should provide for an adequate foundation for the proposed nuclear facility.