A State of The Art Review on Soil-Structure Interaction and Seismic Protection System of Nuclear Power Plant

Soil-structure interaction (SSI) is conventionally considered to be advantageous to the seismic response of a structure. Designers proposed that the least consideration of SSI in structural design results in conservative design. Indian Standard codes allow seismic coefficient ignorance or total reduction of SSI. However, advancements made in developing methods by adding SSI in design to avoid the SSI problem becomes a rarity. This paper summarizes several guidelines and techniques related to SSI analysis of structures. Seismic protection systems (SPS) are successfully installed in conventional designs, but most of the nuclear power plants (NPPs) are not equipped with SPS. Besides, considerable research was carried out to comprise SPS in nuclear power plant design. Currently, horizontal isolation is provided in for structures in active seismic zones. This may be insufficient and vertical isolation has also been required. The results of this review indicated that the future construction of nuclear plants in seismic zones should be equipped with advanced SPS to fulfill the standardised design.