ML19329B636
| ML19329B636 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 08/29/1975 |
| From: | Harold Denton Office of Nuclear Reactor Regulation |
| To: | Moore V Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8002050751 | |
| Download: ML19329B636 (2) | |
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AUG 2 9 1975 Voss A. Moore, Assistant Director for Light Water Reactors, Group 2. EL SER INPUT - GEOLOGY, SEISMOLOGT, AND FOUNDATION ENGINEERING PUtNT NAME: Davis-Besse Unit No.1 LICENSING STACE: OL 1
DOCKET NUMBER: 50-436 MILESTONE No.: 24-32 RESPONSI3LE BRANCH: LWR 2-3 REQUESTED C0!ELETION DATE:
8/29/75
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APPLICANTS RESPONSE DATE NECESSARY FOR NEXT ACTION PLANNED ON PROJECT: N/A DESCRIPTION OF RESPONSE: N/A REVIEW STATUS: N/A Our input to the SER on the geology, seismology, and foundation engi-neering for the Davis-Besse Unit No.1 follows:
The geology, seismology, and foundation engineering for the Davia-Besse Nuclear Plant site was reviewed at ths construction permit stage of licensing for Unit No.1 by NRC staff and their advaors in the U. S.
Geological Survey. The results of the reviews are included in our Safety Evaluation Report dated Nover:bar 2,1970, in U. S. G. S. report dated August 4, 1970, and in the Coast and Geodetic Survey report dated July 15, 1970, which are appended to the Safety Evaluation Report.
The Tymochtse Formation upon which the plant structures were constructed was, during initial site exploration, found to contain solution cavi-ties in the vic'u2ity of the site. Although cavities were not encountered in the plant area, the applicant couaitted to perfor:n a bedrock veri-fication and remedial treatment program. Based.on 71 borings and 198 rock probes in the plant area, on bedrock surface napping during construction, and on the absence of geophysical -lies in the bed-rock foundations, the applicant concluded that there is no solutioning activity that would be a hasard to safe plant operation. The remedial treatment part of the program was not. found necessary.
No further geological or saimmalogical information has been received since the 1970 safety evaluation report was written, in which we and 8o0205095\\
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Voss A. Moore AUG 2 9 1975 our U. S. G. S. advisore concluded that a ground acceleration of 0.15g for the safe shutdown earthquake and 0.08g for the operating basis earthquake are acceptable, and that there are no known faults within the site boundary. There is no reason to change our earlier conclusion stated above.
14 Harold R. Denton, Assistant Director for Site Safety Division of Technical Reviev Office of Nuclear Reactor Regulation cc R. Boyd W. Mcdonald J. Panzarella S. Hanauer R. Heine: nan SS Branch Chiefs D. Crutchfield A. Schwencer L. 2ngle A. Cardone R. Klecker D. Eisenhut M. Williams J. Carter S. Varga l$ Ls U W
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