[2I01-04] Nuclide Adsorption & Separation 1

[2I01] Development of Minor Actinides separation and storage technology by process using flame-retardant and low heat of vaporization diluent and CHON extractant

(1)Purpose and overview of development

Koichi Kakinoki¹, Naoki Ogawa¹, Ryokichi Hamaguchi¹, Taisuke Tsukamoto¹, *Takashi Shimada¹, Masahiko Nakase², Miki Harigai², Tomoo Yamamura³, Chihiro Tabata³, Mariko Konaka³ (1. Mitsubishi Heavy Industries, Ltd., 2. Tokyo Institute of Technology, 3. Kyoto University)

Keywords:Minor Actinides, Separation, Storage, Direct conversion to oxide, Low vaporization heat diluent

In order to reduce the disposal load as much as possible, it is effective to separate Minor Actinides (MA) from high level waste and to store it stably without waiting for the practical application of transmutarion means such as fast reactor. Mitsubishi Heavy Industries, Tokyo Inst. of Technology, and Kyoto Univ. jointly developed a process with small environmental loading for the early practical application of MA separation and storage, by adopting an existing DGA system extractant with results in MA extraction, and drawing the features of "Composed of CHON components, reducing waste load" of the same extractant maximally by combining it with a flame retardant low vaporization heat diluent.