Simulating -ray degradation of the TEHDGA adsorbent by the He ion beam irradiation experiment

Miyazaki, Yasunori  ; Watanabe, So  ; Nakamura, Masahiro ; Koka, Masashi*; Yuri, Yosuke*; Yuyama, Takahiro*; Ishizaka, Tomohisa*; Hanaya, Hiroaki*

For the carbon neutral society of 2050, advanced spent nuclear fuel reprocessing technology is required to reduce the volume of radioactive waste and radiotoxicity by separating minor actinides (MA: Am, Cm) from the liquid waste. One of the candidates is extraction chromatography that adapts the use of an adsorbent packed in a column. The adsorbents impregnating the extractants of N,N,N',N'-tetra(2-ethylhexyl)diglycolamide (TEHDGA) and N,N,N',N',N'',N''-hexaoctylnitrilotriacetamide (HONTA) on the silica-based support are proposed for the two-step MA separation. In this study, the radiation resistance of the TEHDGA-impregnated adsorbent was investigated by the He ion at 5.5 MeV to simulate the -ray of the MA nuclides. The degradation is evaluated by the distribution coefficient of Eu as a complexing ability.