Ac-225 production using the experimental fast reactor Joyo

Sano, Aaru; Sasaki, Yuto*; Sasaki, Shinji  ; Iwamoto, Nobuyuki  ; Ouchi, Kazuki  ; Kitatsuji, Yoshihiro  ; Maeda, Shigetaka   ; Takaki, Naoyuki*

Ac-225 can be applied to cancer treatment of various sites, but world supply is scarce. In this study, in order to study the production of Ac-225 using fast neutrons, we evaluated the amount of Ac-225 produced by fast neutron irradiation of Joyo. Burn up calculations were performed with Ra-226 as the target using ORIGEN2.2 for the evaluation of the production amount. In addition, the uncertainty of Ac-225 production was evaluated from the nuclear reaction cross section of the target nuclide and the neutron flux of Joyo. This study showed that a large amount of Ac-225 can be produced by irradiating Ra-226 at Joyo. In the future, we will improve the accuracy of evaluation of the production amount through demonstration experiments.