[2I19-22] Aqueous Separation and Reprocessing

[2I20] Development of a new extraction method for americium separation

*Hideya Suzuki¹, Yasutoshi Ban¹, Yasuhiro Tsubata¹, Shinobu Hotoku¹, Nao Tsutsui¹, Tatsuya Kurosawa¹, Mitsunobu Shibata¹, Tomohiro Kawasaki ¹, Tatsuro Matsumura¹ (1. Japan Atomic Energy Agency)

Keywords:Am separation, solvent extraction, extractant , HLLW, ADAAM

The new process aims at recovering americium (Am) alone from high level waste liquid (HLLW) using an alkyl diamide amine (ADAAM) extractant. The principle of the process is based on the extraction of americium together with light lanthanides (La, Ce, Pr, Nd) having close values of distribution ratio, while curium, other lanthanides, and other fission products remain in the aqueous phase. The Am is subsequently selectively stripped from the light lanthanides. As a result, Am was directly separated from the simulated HLLW with high efficiency.