Speaker
Mr
Alexander Osipenko
(Research Institute of Atomic Reactors)
Description
Molten chlorides have more high radiation resistance than aqueous and organic media. This fact is of significant importance because curium has a high specific activity. And, correspondingly, it can be used for partitioning of curium from waste before its vitrification. Data on thermodynamics of formation for oxygen-containing curium compounds in chloride melts was obtained by authors [1] with using of potentiometric titration. This work is devoted to more precise definition of these date by using of spectroscopic method. It is obtained spectrum of Cm3+ and CmO+ complex in melt NaCl-2CsCl-CmCl3 at 550, 600 and 650оС over argon atmosphere and different partial pressure of HCl/H2О. It is demonstrated appearance of peak for CmO+ complex at range of 358nm as a result of three different reactions, leading to formation of oxide ions in melt. Dependences of Cm3+ и CmO+ concentration on partial pressure of HCl/H2О are obtained. From these experimental data dissociation constants of CmO+ and CmOCl are calculated.
1. A.G. Osipenko et al. Study of Reaction of Curium Oxy-Compound Formation in Molten Chlorides// Radiochimica Acta 97, 227-230 (2009).
Primary author
Mr
Alexander Osipenko
(Research Institute of Atomic Reactors)
Co-authors
Dr
Alexander Bychkov
(Research Institute of Atomic Reactors)
Mr
Alexander Maershin
(Research Institute of Atomic Reactors)
Mr
Mikhail Kormilitsyn
(Research Institute of Atomic Reactors)
Dr
Vladimir Volkovich
(Research Institute of Atomic Reactors)
