1. Nuclear Professional School, School of Engineering, The University of Tokyo, 2-22 Shirakata-shirane, Tokai-mura, Naka-gun, Ibaraki 319-1188, Japan
2. Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
3. Institute for Quantum Life Science, National Institutes for Quantum Science and Technology (QST), 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1106, Japan