The subject of the expert opinion was an independent review of the station blackout analyses performed with the MAAP code and, where possible, to perform independent analyses, calculations and evaluations to support the expert opinion. In total 17 scenarios calculated by the MAAP computer code were reviewed. Based on the review and 10 independent RELAP5 calculations of RCS response, conclusions on the acceptability of results obtained by MAAP were formulated.
F.30 Professional assessment of the situation
COBISS.SI-ID: 25228839Experiments on hydrogen combustion, which were performed in the ENACCEF experimental facility (CNRS Orleans, France), were simulated with the computer code CONTAIN. The ENACCEF facility consists of a vertical cylindrical tube connected to a cylindrical dome. In the experiments, a negative hydrogen concentration gradient was established along the tube before ignition in the tube bottom. An input model for the CONTAIN code was developed. The simulation results of flame propagation were compared to experimental data.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 25480487Steam explosion experiments revealed important differences in the energy conversion efficiency among the melts. The differences observed in the experiments are due to the differences in the jet fragmentation, the melt droplet solidification and the void production. These are limiting processes in the steam explosion phenomenon and have to be modelled adequately in fuel-coolant interaction codes. The thesis focuses on the modelling of the solidification effect which inhibits the fine fragmentation of the melt droplets and therefore influences directly the strength of the steam explosion. An improved solidification influence modelling approach suitable also for Eulerian fuel-coolant interaction codes was developed.
D.09 Tutoring for postgraduate students
COBISS.SI-ID: 2378852