The thermal interaction of certain molten materials such as Al2O3 with water results in vapor explosions with very high (supercritical) pressures and propagation velocities. A quasi-steady state analysis and a transient analysis of a supercritical vapor explosion in one-dimensional multiphase flow was applied to analyze experimental data of Al2O3-water Fuel-Coolant Interaction obtained from the KROTOS 26 test. The shock adiabatic thermodynamic model and the TEXAS mechanistic model were used to perform this analysis. The predicted results of the initial vapor void fraction and explosion conversion ratio from both models, together with the estimated experimental results, were compared and shown to be in good agreement.