The CANDU nuclear power plants seismic design complies with the Canadian standards developed for nuclear seismic design and also with relevant IAEA Safety Design Standards and Guides. In this paper, the Canadian seismic design philosophy and the seismic design approach for meeting the safety design requirements is reviewed. The results of the seismic design and analysis, including soil-structure interaction, employed in the CANDU seismic qualification program are presented. These studies indicate that the CANDU plants have significant seismic design margins and could be seismically qualified for a wide range of site conditions. The results also indicate that the design of the CANDU plants is capable of being qualified for 0.3g design basis earthquake acceleration, for site-specific applications.
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