An attempt was made to select thermodynamic data with
uncertainties and to evaluate the solubility of radioelements with
uncertainties considering the uncertainties of the thermodynamic data and
variation in groundwater chemistry. The thermodynamic data were selected by
reviewing the JAEA-TDB released in 2012 from the viewpoint of consistency of
the data selection process, the conservativeness of the solubility
evaluation and testing up-to-date data. A Monte Carlo-based probabilistic
solubility calculation code, PA-SOL, was used for the uncertainty analysis
of the solubility.
The uncertainty analysis for the solubility of 13 elements showed large
uncertainties for Nb, Tc and U. The variations in pH, pe and total carbonate
concentration assumed in this study induce significant uncertainties to the
evaluated solubility. The reactions whose log K0 with uncertainties
induce significant uncertainties to the evaluated solubilities were
Radiochimica Acta publishes original papers, review articles, and “rapid communications” (short articles of a more timely interest) on all chemical aspects of nuclear science and technology. The journal is geared toward scientists who are actively engaged in research work.