1. Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering, Osaka University, Suita, Osaka, Japan
2. Japan Aerospace Exploration Agency, Tsukuba, Ibaraki, Japan
3. SOKEN-DAI (Graduate University for Advanced Studies), Sagamihara, Kanagawa, Japan
4. Advanced Engineering Services Co. Ltd., Tsukuba, Ibaraki, Japan
5. Research Institute of Nuclear Engineering, University of Fukui, Tsuruga, Fukui, Japan