[1H06-10] Separation and Recovery of Actinide Elements

[1H10] Separation of Am by a mixed solvent of two extractants (ADAAM and B-TONAADA) in the SELECT process

*Hideya Suzuki¹, Kojiro Shimojo¹, Satoshi Nakamura¹, Tatsuya Emori¹, Tatsuya Kurosawa¹, Mitsunobu Shibata¹, Tomohiro Kawasaki¹, Ban Yasutoshi¹ (1. Japan Atomic Energy Agency)

Keywords:minor actinide, MA separation, americium, SELECT process, solvent extraction, ADAAM, B-TONAADA

The Japan Atomic Energy Agency (JAEA) has been studying partitioning and transmutation (P&T) systems. In P&T, JAEA proposed a novel hydrometallurgical process called “SELECT (Solvent Extraction from Liquid waste using Extractants of CHON-type for Transmutation) process” for nuclear fuel reprocessing and minor actinides (MA) separation. In this study, a new MA separation method was investigated to further improve the efficiency of the SELECT process. Batch tests were conducted in a mixed solvent system using the acidic amide-type extractants nitriloacetic acid diacetamide with branched side chains (B-TONAADA) and alkyl diamidoamine (ADAAM). As a result, we found an efficient method for separating only americium (Am) from an aqueous nitric acid solution containing MA and rare earth elements by adjusting nitric acid concentration.