[3K01-07] Nuclide Separation

10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)

[3K05] Study on the removal of radiation degradation products from the TEHDGA adsorbent for extraction chromatography

*Yu Kazama¹, Hiroki Fukumoto¹, Yasunori Miyazaki², Yuichi Sano² (1. Ibaraki Univ., 2. JAEA)

Keywords:

minor actinide recovery,extraction chromatography,vacuum evaporation,deterioration removal,TEHDGA

High-level radioactive liquid waste (HLLW) from spent fuel reprocessing in the nuclear fuel cycle is to be vitrified and disposed of deep underground. It is reported that the separation of minor actinides (MA: Am, Cm) in the HLLW is effective in reducing the heat load per vitrified body, thus decreasing the repository area. Extraction chromatography has been developed but radiation degradation of the adsorbent material is a plant engineering issue. In a previous study, the γ-ray degradation products of N,N,N‘,N’-tetra(2-ethylhexyl)glycolamide (TEHDGA) were estimated to investigate their behaviour with the integrated dose. In this study, 1H NMR and TG/DTA measurements of the adsorbent (or organic matter) were performed under the vacuum distillation conditions to remove the degraded matter from the mixture.