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The buildings and structures are designed with the application of a Safe Shutdown Earthquake (SSE) rating of 0.3g as a Design Basis Earthquake (DBE) to increase their ductility against earthquakes. The seismic input motion enforced in the high frequency range is applied to envelope the design ground response spectrum of the regulation guide 1.60 standard spectrum. In the meantime, the design load of Operating Base Earthquake (OBE) is eliminated in order to improve design and verification.
Since the seismic evaluation is performed with the inclusion of the effects of soil-structure interaction on soil sites, the APR1400 can be constructed on rock bed, as well as soil sites.
Seismic Input Motion graph images
Schematic Diagram of Soil-Structure Interaction example images