R&D on medical RI production using domestic nuclear infrastructures to achieve self-preparedness (2), 6; Ac purification and Ra reuse processes in Ac-225 production using fast reactor

Ouchi, Kazuki  ; Kitatsuji, Yoshihiro  ; Maeda, Shigetaka   ; Takaki, Naoyuki*

In previous study, we have studied the purification process for efficient recovery of Ac-225 produced by neutron irradiation of Ra-226 in a fast reactor. In this presentation, the reuse process for re-irradiating Ra-226 after separation of Ac-225 was studied by using Ba and La as alternative elements. By using Ln resin as adsorbent and changing the nitric acid concentration, the conditions under which Ra can be isolated from impurities expected to be produced by irradiation were clarified. We propose a purification process for Ac using DGA resin and a recycling process for Ra using Ln resin.