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Report No.
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Extraction chromatography for Am and Cm recovery in engineering scale

Koma, Yoshikazu; Watanabe, So; Sano, Yuichi; Asakura, Toshihide; Morita, Yasuji

In the framework of the feasibility study on commercialized FR cycle system, JAEA evaluated An(III) recovery processes on design basis, and the extraction chromatography technique, which uses SiO$$_{2}$$ support coated with styrene-divinylbenzene polymer and an extractant on its surface, was evaluated as the most promising process. JAEA has been developing extraction chromatography for An(III) recovery from HLLW aiming at an engineering scale application. The R&D work is devoted to two axes; process and system development. Process development includes choosing the best extracant and making a flowsheet correspond to the extractant in the view of performance, safety and durability. Engineering scale system should be established so as to be safe, easy in operation and economic. For the purpose, system experiments for fluidics, safety and durability using engineering scale column as well as studies on remote control/maintenance were planned. In order to obtain the best flowsheet, we have started to assess the characteristics of adsorbents with some extractants by laboratory scale experiments; adsorption/elution properties for some fission products and actinides, and safety on acid, $$gamma$$-radiation and heat resistance. CMPO is superior in radiation damage to adsorption capacity. CMPO and HDEHP can be used up to 200 $$^{circ}$$C regardless of nitric acid media.

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