Seismic Isolation Technology Analysis of Heavy Liquid Metal Cooled Reactor

Heavy liquid metal cooled reactor usually adopts the integration of pool type structure. Owing to the reactor vessel dimensions, the large free surface and the high density of the coolant, seismic loading and sloshing may become very important problem. Isolation technology would be an important way to improve the seismic safety of nuclear power engineering and site adaptability. Considering the seismic response of heavy liquid metal cooled reactor is much amplified, the research of isolation technology applied in heavy liquid metal cooled reactor is valuable and urgent. Nowadays the isolation technology is limitedly employed in NPP construction. In this paper, a general analysis of the isolation technology development in present situation and its potential benefits and challenges of applying in design of liquid heavy metal cooled reactor are investigated. And the isolation technology and non-isolation technology are compared within China Lead-based Reactor (CLEAR). In addition, the results also give a guideline for the detailed foundation design of CLEAR plant, as well as provide reference for plant-based design of liquid heavy metal cooled fast reactor.