Americium separation from nuclear fuel dissolution using higher oxidation states.

Mincher, Bruce J.

Idaho National Laboratory

关键词: Aqueous Separations;    Rare Earths;    Actinides;    Oxidation;    Dissolution;   

DOI  :  10.2172/971364
RP-ID  :  INL/EXT-09-16805
RP-ID  :  DE-AC07-05ID14517
RP-ID  :  971364

美国|英语

来源: UNT Digital Library

【 摘 要 】

Much of the complexity in current AFCI proposals is driven by the need to separate the minor actinides from the lanthanides. Partitioning and recycling Am, but not Cm, would allow for significant simplification because Am has redox chemistry that may be exploited while Cm does not. Here, we have explored methods based on higher oxidation states of Am (AmV and AmVI) to partition Am from the lanthanides. In a separate but related approach we have also initiated an investigation of the utility of TRUEX Am extraction from thiocyanate solution. The stripping of loaded TRUEX by Am oxidation or SCN- has not yet proved successful; however, the partitioning of inextractable AmV by TRUEX shows promise.