[10a-E219-1~12] 2.1 Radiation physics, Material development and characteristic evaluation

9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[10a-E219-1] Time-of-Flight Identification of Neutron-Induced Fission Neutrons Using a Compact Accelerator-Driven Neutron Source

〇(M1)Masahiro Tomita^1,2, Yasuki Okuno², Keisuke Yamane¹, Takaoki Takanashi², Hiroki Kusano² (1.Toyohashi Univ., 2.RIKEN RAP)

Keywords:

Active neutron method,Time-of-flight method,Fuel debris

In the active neutron method for fuel debris management at the Fukushima Daiichi Nuclear Power Plant, distinguishing between source neutrons and fission neutrons remains a challenge. This study proposes a method to temporally separate them using the time-of-flight technique. Through irradiation experiments on uranium (U) glass using RIKEN RANS-II and PHITS simulations, U-fission-derived neutrons were successfully separated and observed after 500 µs, demonstrating that this approach is effective in improving the resolution of U measurements.