Calculation of the Fragmentation of UO₂ by Capacitor Discharge: Nonequilibrium Model

A model based on phase-space considerations is developed to describe the fragmentation of UO₂ by capacitor discharge, i.e., to predict such quantities as the amount of gas and liquid produced, the number of liquid fragments, the number distribution of the molecules in the liquid fragments, the kinetic-energy distribution of the gas and liquid fragments, etc. This model cannot give a unique numerical prediction of all of these quantities based only on the initial-state specification, but it does enable all of these quantities to be expressed in terms of the average internal energy of a gas molecule in the final state, the average binding energy of a UO₂ molecule in a liquid fragment in the final state, and the average number of molecules in a liquid fragment in the final state.