United States Nuclear Regulatory Commission - Protecting People and the Environment

Seismic Safety Margins Research Program, Phase I Final - Plant/Site Selection and Data Collection (Project I) (NUREG/CR-2015, UCRL-53021, Volume 2)

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Publication Information

Manuscript Completed: May 1981
Date Published: July 1981

Prepared by:
T. Y. Chuang

Lawrence Livermore Laboratory
7000 East Avenue
Livermore, CA 94550

NRC FIN No. A0130

Prepared for:
Office of Nuclear Regulatory Research
U. S. Nuclear Regulatory Commission
Washington, DC 20555

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Abstract

Project I of Phase I of the Seismic Safety Margins Research Program (SSMRP) comprised two parts: the selection of a representative nuclear power plant/site for study in Phase I and the collection of data needed by the other SSMRP projects. Unit 1 of the Zion Nuclear Power Plant in Zion, Illinois, was selected for the SSMRP Phase I studies.

Unit 1 of the Zion plant has been validated as a good choice for the Phase I study plant. Although no single nuclear power plant can represent all such plants equally well, selection criteria were developed to maximize the generic implications of Phase I of the SSMRP.

On the basis of the selection criteria, the Zion plant and its site were found to be reasonably representative of operating and future plants with regard to its nuclear steam supply system; the type of containment structure (prestressed concrete); its electrical capacity (1100 MWe); its location (the Midwest); the peak seismic acceleration used for design (0.17g); and the properties of the underlying soil (the low-strain shear-wave velocity is 1650 ft/s in a 50- to 100-ft-thick layer of soil overlying sedimentary bedrock).

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