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Vitrification properties of MA adsorbents

MA吸着剤のガラス化特性

小藤 博英  ; 渡部 創  ; 後藤 一郎; 折内 章男; 竹内 正行 ; 小林 秀和 ; 捧 賢一

Kofuji, Hirohide; Watanabe, So; Goto, Ichiro; Oriuchi, Akio; Takeuchi, Masayuki; Kobayashi, Hidekazu; Sasage, Kenichi

多孔質シリカにアクチニドやランタニドの抽出剤を含浸させた吸着材を用いた抽出クロマトグラフィ技術により、マイナーアクチニドを吸着あるいは分離した吸着材をガラス固化する手法の評価を行っている。本報では代表的な抽出剤であるCMPOやHDEHPを用いた吸着材に模擬廃棄物を吸着させた試料の高温分解特性を評価するとともに、ガラス固化体試料を調製し、ガラス化状況や化学的安定性の評価を行った。吸着材は概ね良好にガラス化され、十分な耐水性を有する結果が得られたが、ガラス化における気泡発生等、いくつかの課題が明らかになった。

Vitrification procedure for the extraction chromatography using porous silica covered with extractant were examined. In this method, it was expected that minor actinide (MA) were separated from high level radioactive liquid waste using extractant CMPO and/or HDEHP. In this study, vitrified adsorbent with simulated high level liquid waste were prepared and evaluated from some viewpoints of high level waste form properties. As the results, selected adsorbent were generally well vitrified and had enough chemical durability.

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