Multiphysics modelling of gaseous fission products in the Molten Salt Fast Reactor

The Molten Salt Fast Reactor (MSFR) is a nuclear reactor concept under development in the framework of H2020-Euratom project SAMOSAFER. Given its peculiar characteristics as circulating-fuel reactor, new simulation tools need to be developed and tested for study. In this work, multiphysics solver previously OpenFOAM extended with functionalities analysis design. main focus modelling behavior Gaseous Fission Products (GFPs) inside core their interactions helium bubbling system, foreseen remove both GFPs metallic fission products through flotation. On basis an Euler-Euler able model presence two phases – namely liquid fuel gaseous bubbles , multi-component mixture approach adopted simulate GFP species core, particular on production, consumption, transport, mass exchange removal off-gas system. capabilities are 2D 3D MSFR cases, considering Xe-135 reference nuclide, efficiency system from salt. As figure merit capability, cycle time related extraction specie defined calculated different conditions injection. This work constitutes further advancement concept, extending previous solver. Reliable estimation evolution effect fundamental requirement radioactive source term prediction overall operating innovative