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MA recovery experiments from genuine HLLW by extraction chromatography

抽出クロマトグラフィーによる高レベル放射性廃液からのMA回収試験

渡部 創  ; 先崎 達也; 柴田 淳広  ; 野村 和則  ; 駒 義和  ; 中島 靖雄  

Watanabe, So; Senzaki, Tatsuya; Shibata, Atsuhiro; Nomura, Kazunori; Koma, Yoshikazu; Nakajima, Yasuo

「常陽」照射済燃料溶解液を用いて、抽出クロマトグラフィーによるMA回収試験を実施した。試験はCMPO, HDEHPカラムを用いるフローとTODGA, isoHex-BTPカラムを用いるフローの2ケースについて実施し、MAの回収率及びFPの除染係数から各フローの性能を確認した。試験より得られたMA回収率及び除染係数は目標値に達しなかったものの、フローシート及び吸着材の改良により所定の性能が得られる見通しが得られた。

Extraction chromatography experiments with two promising flow-sheets on genuine high level liquid wastes were carried out for demonstrating the feasibility of the method. One flow-sheet consists of CMPO/SiO$$_{2}$$-P and HDEHP/SiO$$_{2}$$-P adsorbent columns, and the other consists of TODGA/ SiO$$_{2}$$-P and isoHex-BTP/SiO$$_{2}$$-P adsorbent columns. Although recovery yields of MA and decontamination factors of FPs obtained by those experiments were lower than the required values, the second flow-sheet is expected to achieve the required performance providing that some minor improvements on the flow-sheet or the adsorbents are applied.

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