Shaking Table Test for Evaluation of Seismic Behavior of Nuclear Power Plants on Non-Rock Site

In order to study the suitability and seismic response characteristics of the nuclear power plants on non-rock site, taking CAP1400 nuclear power plant（NPP） structure as an example, the shaking table test considering soil-structure interaction（SSI） was completed. The test study indicates that the site can amplify the peak acceleration which presents in all different directions, and the structure can influence the site response spectra in low frequency. Cracks appear on the model site when inputting less than safe shut-down earthquake（SSE）, and the contact surface between the structure and the soil separates when inputting safe shut-down earthquake（SSE）. At the end of the test, the surface cracks on the model site were connected. The model structure had no crack. The damage of the model system was due to the instability of the foundation. It was obvious that the seismic response of the NPP was affected by site conditions, thus the site conditions and the SSIanalysis should be taken into account in the seismic response analysis of the NPP.