1. Department of Applied Energy, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, Japan
2. Division of Energy and Environmental Systems, Graduate School of Engineering, Hokkaido University, Hokkaido, Japan
3. Research Center for Safe Nuclear System, Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka, Japan
4. Department of Nuclear Reactor Physics, Research Institute of Nuclear Engineering, University of Fukui, Tsuruga-shi, Fukui, Japan