部門設立30周年記念出版 : Vol. 4沸騰水型原子炉

（過酷事故に対する格納容器強化）

抄録

In Vol.4 "Boiling Water Reactor" of JSME series in thermal and nuclear power generation, progress in reinforcement of containment vessel design considering severe accidents is described extensively. Also, regarding the core catcher, which is one of the measures to cool the molten core to enhance the safety of the containment vessel, its current technique of each plant and related R&Ds are described. This paper introduces some of them. Recently, the development of innovative light water reactors with improved safety based on current light water reactor designs has accelerated. This paper also introduces the application of containment vessel reinforcement technology to the innovative light water reactors.