ML20128C168

Preliminary Review 2:Geology

ML20128C168
Person / Time
Site:	Vogtle, 05000426, 05000000, 05000427
Issue date:	09/11/1973
From:	Morris R INTERIOR, DEPT. OF, GEOLOGICAL SURVEY
To:
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ML19292B772	List: ML19292B771 ML19292F169 ML20127A269 ML20127A345 ML20127A390 ML20127A443 ML20127A464 ML20127A814 ML20127A820 ML20127A923 ML20127A943 ML20127A959 ML20127B042 ML20127B062 ML20127B403 ML20127B689 ML20127B713 ML20127B794 ML20127B884 ML20128B972 ML20128C022 ML20128C044 ML20128C071 ML20128C089 ML20128C105 ML20128C120 ML20128C138 ML20128C168 ML20128C203 ML20128C270 ML20128C286 ML20128C294 ML20128C313 ML20128C327 ML20128C337 ML20128C366 ML20128C403 ML20128C503 ML20128C842 ML20128C867 ML20128C938 ML20128C976 ML20128D257 ML20128D287 ML20128D427 ML20128D470 ML20128D479 ML20128D514 ML20128D662 ML20128D680 ... further results
References
FOIA-84-624 NUDOCS 8505280208
Download: ML20128C168 (2)

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Preliminary Review #2 September 11, 1973 R. H. Morris Georgia Power Company Vogtle Nuclear Poder Plant Burke County,. Georgia AEC Docket Nos. 50-424 to 427 Geology The geologic information provided in amendments 3 and 5 of the.

Preliminary Safety Analysis Report submitted by Georgia Power s

Company for the Vogtle site has been reviewed and evaluated as responses to the questions 2.l'9 through 2.25.

All responses appear.

to be' adequate with the exception of those for questions or parts.

thereof (2.20, 2.21, 2.25) which are related to the buried Triassic

,b basin..

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The response to question 2.25, dated 7/27/73, is given in amend =ent 5 and cfigure 2.5-4A, amendment 3, dated '7/6/73.

Figure' 2.5-4A has been modified from the original (Siple,1957, USGS WSP 1841) by the addition of the location symbol for the VNP site and as shown the" site is is: mediately to the ' west of the inferred Triassic basin.

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The site is very generally-located in figure 2.5-4A with respect to the Triassic basin and appears to differ significantly from the

. location shoin in figure 2.5-3.

Either of the two. locations presented n

requires discussion of structural relationships to the Triassic basin.

8505280208 841015 PDR FOIA SHOLLY84-624 PDR 4

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's As plotted on figure 2.5-4A, the location is in line with the l

northwest boundary of the inferred Triassic basin, which, in view of the precision of the available magnetic data, could well project to the southeast beneath the location given for the site. harine and Siple (1971) state that in'a test hole located about 9 miles northeast of the VNP site, about 1,590 feet of Triassic fanglomerate was penetrated

. before entering crystalline basement. A group of seven test holes lo-cated about 2 miles. north of the above hole all penetrated crystalline rock below the Coastal Plain sediments. The northwest bounda'ry of the Triassic basin appears, therefore, to be abrupt with over 1,500 feet of relief--much of which could be structural--expressed on top of the crystalline basement.

When the location provided in figure 2._5-3 is used, the site is t-,.

approximately over the inferred. southwestern Triassic basin boundary.

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..The trend of this boundary appears to be p'arallel and to lie generally below the axis or slope of the southwestward dipping monoclinal flexure illustrated in figure 2.5-10.

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The applicant should provide a site vicinity map that accurately portrays the site location and the underlying structural features and revise the discussion of the relationship of the site to the under-t

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lying Triassic basin structure as required.

Neference' cited f.

Marine, I. W.,

and Siple, G.

E., 1971, Buried Triass'ic bas'in in the central Savannah River area, South Carolina and Georgia [ abs.]:

Geol. Soc. America, Southeastern section, Abstracts with Programs,

v. 3, no. 5, p. 289-363.

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• 2 m.,

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