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ゼオライトによる発熱性元素Csの固定化

Immobilization of cesium using zeolites

富山 伸*; 三村 均*; 新堀 雄一*; 山岸 功 ; 森田 泰治  

Tomiyama, Shin*; Mimura, Hitoshi*; Niibori, Yuichi*; Yamagishi, Isao; Morita, Yasuji

高レベル廃液に含まれる発熱性元素Csを、ゼオライトの一種でCsに選択性の高いモルデナイトを用いて固定化する技術を検討した。Csを吸着させたモルデナイトをプレス後に焼成した固化体の評価では、モルデナイト試料の粒径が小さいほど固化体密度は増加することがわかった。また、プレス後に焼成するよりも、高温でプレスした方が試料密度は1.5倍程度に増加し、より緻密な固化体が得られた。

Immobilization of cesium separated from high-level liquid waste was studied by using a mordenite, which adsorbs cesium selectively. Ceramic samples were prepared by pressing and sintering the mordenite loaded with cesium. Ceramics of the higher density were obtained by sintering the pressed mordenites of the smaller particle size. The density of the sample sintered with pressing, which is called hot-pressing, was higher than that of the sample sintered after pressing by a facor of 1.5.

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