Preliminary design and analysis of Liquid Fuel Molten Salt Reactor using multi-physics code GeN-Foam

摘要: Abstract In this study, a hypothetical fast spectrum Liquid Fuel Molten Salt Reactor (LFMSR) core is modeled using the multiphysics C++ code GeN-Foam (General Nuclear Foam). based on OpenFOAM, open-source library for solution of continuum mechanics problems. The utilizes unified fine/coarse mesh approach, modeling different physics such as neutron kinetics, thermal-hydraulics porous fluid equations, and structural thermal-mechanics. A steady state analysis simplified two-dimensional (2D) LFMSR model has been performed assuming rotational symmetry to cross verify with commercial ANSYS Computational Fluid Dynamics (CFD) Fluent. calculations showed very good agreement between two codes allowing progression three-dimensional (3D) simulation. coupled kinetics CFD right-cylindrical 3D one quarter while boundaries reduce computational time. Mixed uranium plutonium chloride fuel selected in preliminary study. Both 2D simulations appearance recirculation zones within right-cylinder core. These can be challenge control materials. new hyperboloid design proposed remove zones, which eight symmetrical loops. An Unprotected Loss Flow accident (ULOF), pump head instantaneously reduced zero, demonstrate safety characteristics reactor most challenging possible situations LFMSR. obtained results (e.g., total precursors concentration at inlet reduction nominal power following transient) confirm that capable performing transient used optimization. Although current needs further assessment development, it shows encouraging performance under ULOF conditions paving way next step optimization process.