[2O08-11] Neutron Source, Neutron Facility

[2O08] Conceptual design of neutron source for deuteron-incident LLFP nuclear transmutation using cyclotron

*Keijiro Takeda¹, Mitsuhito Fukuda¹, Hiroshi Toki¹, Ryoichi Seki¹, Tsutomu Shinoduka², Hiroki Kanda¹, Tetsuhiko Yorita¹, Masao Nakao¹, Yasuyuki Morita¹, Takafumi Hara¹ (1. RCNP, Osaka Univ., 2. CYRIC, Tohoku Univ.)

Keywords:nuclear transmutation, LLFP, spallation neutron source, PHITS, DCHAIN-SP, Cyclotron

We have been planning neutron source for LLFP transmutation using high-intensity cyclotrons-based neutrons. While transmutation by irradiating 100MeV/u deuterons directly LLFP (Cs-135), spallation neutrons secondarily generated is also used for LLFP (Pd-107). We aim to maximize the transmutation amount of Pd-107 and the production of stable rare metal nuclides. In addition, by repeated calculation of PHITS and DCHAIN-PHITS, we have developed the method to accurately estimate the time evolution of transmutation even when transport calculation of neutrons more than 20 MeV and charged particles is required. In this discussion, we report the present design of neutron sources for LLFP transmutation and the new evaluation method of transmutation amount.