Research Methods of Severe Accident Source Term for Nuclear Power Plant

Abstract

Source term is an important input parameter for evaluation of the radiological consequences in the severe accident and can affect the level of emergency response. The research methods of severe accident source term mainly include numerical simulation and experiments inside and outside reactor. The simulation and experiment research progress of the severe accident source term and the results were discussed, mainly including the migration and release behavior of radioactive nuclides in severe accidents, their existing forms and distribution, the effect of engineering measures on the radioactive source term, the sensitivity analysis of parameters, model verification, etc. Finally, the problems needed to be solved in the severe accident source term research currently were proposed, which could be used to provide reference for the further research.