The off-site severe accident consequence analysis in the nuclear power plant

At present, more and more attentions are paid to the off-site consequence analysis of the severe accident in the nuclear power plant. In this paper, the programs, MELCOR and MACCS, are integrated into the full scope simulator to process the off-site consequence analysis of the severe accident in the nuclear power station. Through the full scope simulator, MACCS can automatically receive the radioactive source term data from MELCOR, and then it calculates the release of radioactive fission products inside and outside the containment according to the local site meteorological data. The areas, where the radiation dose exceeds regulatory limit and people need to be shielded or evacuated, are displayed on the simulator in the form of dynamic map. The off-site severe accident consequence analysis is testified by using the data of one of CPR1000 nuclear power plants in China. The result shows that this method not only expands the scope of application of simulator, but also supplements and improves the severe accident analysis, which can be taken as the reference of the off-site emergency plan.