ML19317E732

Rept on Seismicity of Seneca,Sc Area. Prepared by Us Coast & Geodetic Survey

ML19317E732
Person / Time
Site:	Oconee
Issue date:	06/14/1967
From:	COMMERCE, DEPT. OF
To:
Shared Package
ML19317E731	List: ML19317E728 ML19317E732
References
NUDOCS 7912180875
Download: ML19317E732 (2)

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REPORT ON THE SEISMICITY OF THE SENECA (OCONEE COUNTY), SOUTH CAROLINA AREA At the-request of the Division of Reactor Licensing of the Atomic Energy Commission, the Seismology Division of the Coast and Geodetic Survey has evaluated the seismicity of the area around the proposed reactor site near Seneca (Oconee County), South Carolina, and has reviewed the simi-lar analysis by the applicant in their " Duke Power Company Oconee Nuclear Station Preliminary Safety Analysis Report."

4 The applicant's seismicity report contains a complete list-ing of the earthquakes both distant and nearby, which may

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have affected the proposed site, and a detailed review of the geology within a few hundred miles of the site. Little is known, however, concerning the details of the geological structures in the area and the relationship of these struc-tures to earthquakes. Because of this, the Survey believes that the largest earthquake recorded anywhere in the zone may occur along one of the faults near the site.

Basediupon the review of the seismic history of the siteandtpesurrounding.areaandtherelatedgeologiccon-siderations, the Coast and Geodetic Survey agrees with the e

applicant that an acceleration of 0.05g on rock would be 4

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adequate for representing the ground motions from earthquake disturbances likely to occur within the lifetime of the fa-cility. In addition, it agrees that an acceleration of 0. log -

on rock would represent the ground motions from the maximum earthquake likely to affect the cite. We believe this value would provide an adequate basis for designing protection against the loss of function of components important to safety. We also agree that an acceleration of 0.15g is an adequate basis for designing protection against the loss of function of components important to safety that are not lo-cated on rock.

U. S. Coast and Geodetic Survey Rockville, Maryland 20852 June 14,1967 l

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