Development of active neutron nondestructive assay system Yosuke Toh, Akira Ohzu, Harufumi Tsuchiya, Kazuyoshi Furutaka, Fumito Kitatani, Masao Komeda, Makoto Maeda and Mitsuo Koizumi EPJ Web Conf., 329 (2025) 06001 Published online: 25 June 2025 DOI: 10.1051/epjconf/202532906001