Comparison betweenTechnical Requirements in Different Stan-dards on Synthesis of Design Ground Motion History for Nuclear Power Plants

The main technical requirements in several domestic and American Standards,Codes and Guides involved in the seismic analysis and design activities of nuclear power plants（NPPs）in China are construed in detail in this paper.Based on better understanding of the technical backgrounds and resultant requirements on the synthesis of design ground motion history for NPPs,some discussions and viewpoints in application are conducted together with the engineering in practice.Some conclusions can be provided for reference to conduct the seismic safety evaluation,seismic analysis and design of NPPs.And the suggestions in this paper can be employed in the revision and refinement of the relevant Standards,Codes and Guides in China.