Simulation of Cs behavior during the high temperature voloxidation process using the HSC chemistry code

► Simulation on the behavior of Cs during the high temperature voloxidation was performed. ► Five systems, Cs-O, Cs-I, Cs-Te, Cs-U, and Cs-U, were investigated. ► Stable phases during the oxidative decladding were identified using the TPP diagrams. ► The behavior of Cs at 500-1500 °C was studied for the five systems. ► The effect of a heating atmosphere on the behavior of Cs was also investigated.