[1H11-13] 土壌吸着・分析技術

[1H13] 燃料デブリ分析のための超微量分析技術の開発

(17)アクチノイド分析前処理の二酸化ウラン含有固体粉体化処理の熱酸化法とプラズマ酸化法比較

*麻 卓然¹、立野 嵩陽¹、本間 佳哉²、⼩無 健司²、鈴⽊ 達也¹ (1. 長岡技科大、2. 東北大)

キーワード：模擬デブリ、非平衡プラズマ酸化、ボロキシデーショ ン法

In order to facilitate the dissolution of these insoluble nuclear debris from the Fukushima accident, it is necessary to investigate methods of pulverizing them to increase their surface area. We therefore developed non-equilibrium plasma oxidation device to verify the powderization of uranium dioxide solids and to compare the results with thermochemical oxidation. For the results of the plasma oxidation experiment, Uranium dioxide solid (42mg) can be partly converted to powder by plasma oxidation (6.5h, O₂:0.4 L/min) with a low temperature (less than 200℃). Small uneven bumps of 1µm or less appears on the surface of powders produced by oxidation using non-equilibrium plasma.