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A Systematic Approach to Conducting Seismic Margin Reviews for Nuclear Power Plants

by D. A. Wesley, Structural Mechanics Associates Inc, Newport Beach, CA, USA,
R. P. Kennedy, Structural Mechanics Associates Inc, Newport Beach, CA, USA,



Document Type: Proceeding Paper

Part of: Structural Engineering in Nuclear Facilities

Abstract:

Deviations from the current codes and standards are considered acceptable in a SMR in areas where the design criteria impose significant conservatism provided the intended function of the structure or equipment to achieve a safe shutdown of the plant is not impaired. In addition to the site-specific response spectra, deviation from the seismic design analyses may be expected in the areas of soil-structure interaction, damping, load combinations, and the consideration of ductility for a SMR. In addition, a screening process to determine which structural elements and equipment items should be selected for review is considered acceptable for the SMR, rather than reanalyzing every element of every system. An example of the SMR conducted for the Midland Energy Center is presented.

Subject Headings: Seismic design | Power plants | Structural safety | Seismic tests | Seismic loads | Nuclear power | Structural members

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