[1C16-19] Nuclide Migration 2

[1C17] Effect of Carbonate on the Migration Behavior of Neptunium in Bentonite

*Masayuki Hirakawa¹, Kazuya Idemitsu¹, Ryota Yamada¹, Keisuke Yoshida¹, Yaohiro Inagaki¹, Tatsumi Arima¹ (1. Kyushu Univ.)

Keywords:Bentonite, Neptunium, Carbonate Complex, Diffusion experiment

In this experiment, we focused on the migration behavior of neptunium in bentonite in the presence of carbonate and conducted diffusion experiments as parameters of carbonate concentration and bentonite dry density. From the experimental results, the apparent diffusion coefficient of neptunium tends to decrease with the increase of carbonate concentration.