This note provides an evaluation of the ASTEC V0.2 code capability in simulating typical severe accident scenarios in multi-compartment configuration. The H2 sequence has been used in order to study the influence of the number of compartments on ASTEC V0.2 predictions for four and eleven physical compartments modelling. A discretization of the dome in six volumes (leading the total number of cells to 16) is also performed in order to evaluate the effect of the spray system on the distribution of hydrogen in the dome. Results show that ASTEC V0.2 allows multi-compartment analysis of reactor accident sequences. Its capability in modelling several scenarios with more than 5 days-accident sequences is here demonstrated. Hydrogen combustion propagation within sub-compartments of the reactor containment is also possible.
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