Technology development on seismic analysis of nuclear reactor structure

The prime object of this study is to develop the seismic analysis procedures and to evaluate the structures, systems or components in nuclear power plants in view of seismic safety by the soil-structure interaction (SSI) analysis for the dynamic characteristics of earth's surface to the earthquake motions. The artificial time histories for the design of NPP site were, then, generated. The methods and procedures for the soil-structure interaction analysis, and the technology for the Floor Response Spectra (FRS) generation were established. In connection with this procedures and technology, the computer codes ''TIGEN'' and ''SUPRES'' to generate the artificial time histories compatible with floor design response spectrum were developed and the use of ''SAP V'' and''FLUSH'' codes were made in SSI analysis to assess the dynamic characteristics of mathematical model for the building and structures. The modification for ''SPECTR'' code developed already was made so as to generate floor design response spectra that will be used for seismic qualification of the equipments/systems of NPP. (Author)