Design study on gas cooled FBR using coated particle fuel

not registered; not registered; Kida, Masanori; not registered; not registered  ; not registered; Hayashi, Hideyuki

The phase I feasibility studies on commercialized fast reactor cycle system was conducted until FY2000. In the phase I study, the preliminary designs of the three gas cooled FBR concepts expected to have competitive cost performance with LWR were investigated. The three concepts are (1)Carbon dioxide cooled FBR using pin type fuel, (2)Helium cooled FBR using pin type fuel, (3)Helium cooled FBR using coated particle fuel. This report summarizes the results of the preliminary design study on helium cooled FBR using coated particle fuel conducted until March 2001. The helium cooled FBR plant accomplishes direct gas turbine cycle of high efficiency using heat resisted coated particle fuel and reactor inner structures. The plant also performs core melt proof concept by high temperature performance, negative Doppler coefficient and natural circulation cooling. The plant pursues safety and cost effective concept by the removal of CDA countermeasures, high plant efficiency and realistic twin plant design with modularization. The results have shown that the plant has the possibility of core melt proof safety although the core performance is not sufficient. The plant construction cost is thought to be a little higher than the expected cost and has the possibility to reach the target. The future R&D especially for coated particle fuel and fuel assembly is necessary.