Mechanism and Kinetics of Interaction of FLiNaK–CeF3 Melt with Water Vapors and Oxygen in the Air Atmosphere

The mechanism and kinetic parameters of the interaction FLiNaK–CeF3 melt with water vapors oxygen in air atmosphere were determined using Raman IR spectroscopy, XRD analysis, thermodynamic modeling processes. presence 4CeF3(solution) + 6H2O (gas) O2(gas) = 4CeO2(solid) 12HF(gas) reaction, which disturbs fluoride homogeneity, was verified situ by spectroscopy adopted for high-temperature, chemically aggressive systems. Based on obtained spectral data, type equation, order, rate constant chemical reaction determined. concentration cerium dioxide found to increase linearly time a zero order respect CeO2 detected. change over at T 510 °C is described equation C 0.085t; 0.085 mol. %∙min−1. may be used model emergencies related depressurization coolant circuit or working area molten salt reactor.