Abstract

A set of Pitzer interaction parameters is proposed to describe thermodynamic properties of the H2O–UO2(NO3)2–HNO3 solution within the temperature range of 15 to 50°C and ranges of concentrations of HNO3 and UO2(NO3)2 of 0 to 40 and 0 to 8 mol/kg, respectively. The experimental data on the vapor pressures of the volatile components of the system, degree of dissociation of nitric acid, and solid–liquid equilibria are used to determine these parameters.

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