In the wake of the THAI project, conducted in three phases from 2007 until 2019, a new project, "THAI Experiments on Mitigation measures, and source term issues to support analysis and further Improvement of Severe accident management measures" (THEMIS) has been defined to follow up on outstanding questions in the area of combustible gas and iodine-aerosol behaviour in containment. Issues relating to ex-vessel phases of a severe accident with H2/CO mix, the presence of aerosols, the evolution of airborne iodine oxides and the retention of fission products under pool scrubbing conditions have been identified and require additional research. With regards to the remobilisation phenomena, THEMIS investigations are complementary to the new ESTER project.
THEMIS experiments are highly relevant to the improvement and validation of safety codes and their use, as well as maintaining competence and expertise in this field.
Belgium, Canada, China, Finland, France, Germany, Japan, Korea, Russia, Slovak Republic, Spain, Sweden, Switzerland, United Kingdom
November 2020 to April 2024
EUR 5.05 million