Characteristics of dicesium plutonium(IV) nitrate formation in separation system of uranyl nitrate hexahydrate crystal

There is a concerned that Cs and Pu double salt Cs2Pu(NO3)(6) is formed under certain conditions in the course of U crystallization. The influence of the Cs concentration in a feed solution on Cs2Pu(NO3)(6) formation was thus examined in the U crystallization process. Cesium and Pu were decontaminated after crystal washing with a decreasing Cs concentration in the feed solution. Although Cs remained in the mother liquor at a Cs concentration of 1.0 g/dm(3) in the feed solution, Cs2Pu(NO3)(6) precipitated at a Cs concentration of 2.2 g/dm(3). There is, therefore, a lower limit for the Cs concentration in the feed solution at which Cs2Pu(NO3)(6) precipitates, and this limit falls in the range from 1.0 to 2.2 g/dm(3) Cs. (C) 2012 Elsevier B.V ... Selection and/or peer-review under responsibility of the Chairman of the ATALANTE 2012 Program Committee