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※ 半角英数字
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超臨界流体を用いた全アクチニド一括分離システムの開発

Development of actinides co-extraction system with direct extraction process using super-critical fluid

小山 智造

Koyama, Tomozo

湿式再処理の経済性向上と廃棄物発生量の低減を目的に、超臨界流体CO$$_{2}$$を用いた直接抽出法にて全アクチニドを一括抽出するシステムを、「原子力システム研究開発事業」(文部科学省公募、平成17$$sim$$21年)として、原子力機構を総括代表とし、名古屋大学及び新型炉技術開発の協力のもと、開発を進めている状況を報告する。これまでに代表的FPの分配係数測定,流体挙動の確認等を行った。19年度はFP分配係数測定の継続と常圧での未照射MOX直接抽出試験等を、20$$sim$$21年度はグローブボックスでの未照射MOXの超臨界直接抽出試験及びセルでの使用済燃料の超臨界直接抽出試験を行う予定である。

In order to establish improvement of aqueous reprocessing technology in economy and waste reduction, JAEA has been developing "Actinides co-extraction system with direct extraction process using supercritical carbon dioxide" in collaboration with Nagoya University and ARTECH Co.Ltd. as nuclear system research and development application program by MEXT since 2005. Measurement of distribution factors of major fission product elements and confirmation of supercritical fluid behavior have been executed. In JFY 2007, distribution factors will be continuously measured and direct extraction test of unirradiated MOX in normal pressure will be carried out. In JFY 2008-2009, direct extraction test of unirradiated MOX and irradiated fuel will be executed using supercritical carbon dioxide in a glovebox and a cell.

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