Three experiments on containment phenomena, which were performed in the TOSQAN, PHEBUS and KAEVER integral experimental facilities, were simulated with the lumped-parameter computer code CONTAIN. In the experiments, which were performed at similar pressure and temperature conditions, steam condensation played a dominant role. The simulation results were used to assess the ability of the CONTAIN code to simulate the transient thermal-hydraulic behavior of containment vessels with different arrangements of heat structures.

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