Introduction   Nuclear power units stop operation when intake tunnel fails to work under the earthquake, then it needs adequate water to ensure the preheat discharge and safety shutdown. Seismic analysis of slopes with safety-related water intake structure is the one of the important content for NPP seismic safety assessment report.

    Method   To take a slope with certain safety-related water intake structure, we proposed a suitable seismic checking method and calculation flow for slopes with safety-related water intake structure.

    Result   The results we obtained demonstrate that the static analysis method takes into account the spatial difference of dynamic amplification coefficient of slopes under earthquake, and can consider further deformation and nonlinearity, while the dynamic analysis method can show the temporal and spatial effect of earthquake influence coefficient. The results show that point safety method is more appropriate for evaluation of slope stability.

    Conclusion   This work provides some guidance for further seismic analysis of NPP slopes with safety-related water intake structure.