[2K09-13] Nuclide Adsorption and Separation 2

[2K09] Development of Minor Actinides separation and storage technology by process using flame-retardant and low heat of vaporization diluent and CHON extractant

(11)Crystal Structural Analysis of solid solution of rare earth and uranium oxides in stabilization process

*Tomoo Yamamura¹, Chihiro Tabata¹, Masahiko Nakase², Miki Harigai², Koichi Kakinoki³, Naoki Ogawa³, Ryokichi Hamaguchi³, Taisuke Tsukamoto³, Takashi Shimada³ (1. KURNS, Kyoto Univ., 2. Tokyo Tech., 3. MHI)

Keywords:Actinides, Lanthanides, fluorite-structure oxides

Minor actinides (MAs) obtained by solvent extraction have been investigated to be stored as thermally stable oxide solid solutions for a period of several decades. In this study, after direct oxide formation by methods including the hydrothermal method, rare earth elements (REEs) as simulants of MAs were solid-solved in a uranium dioxide matrix with a fluorite structure.
The results of the crystal structure analysis of the solid solution will be reported.