An Eulerian Single-Phase Transport Model for Solid Fission Products in the Molten Salt Fast Reactor: Development of an Analytical Solution for Verification Purposes

Nuclear reactor modeling has been shifting, over the last decades, towards full-core multiphysics analysis due to ever-increasing safety requirements and complexity of designs innovative systems. This is particularly true for liquid-fuel concepts such as Molten Salt Fast Reactor (MSFR), given their strong intrinsic coupling between thermal-hydraulics, neutronics fuel chemistry. In MSFR, fission products (FPs) are originated within liquid carried by flow all core through pumping heat exchange Some FP species, in form solid precipitates, can represent a major design challenge, e.g., deposition on boundaries, distribution relevant reactor. this regard it essential, both assessment reactor, capability model transport FPs boundary (e.g., wall or exchanger structures). To aim, study, models MSFR developed verified. An Eulerian single-phase integrated consolidated based open-source CFD library OpenFOAM. particular, general mixed-type conditions considered, possibly describe different kinds particle-wall interaction mechanisms. For verification purposes, analytical solutions simple case studies derived ad hoc extension classic Graetz problem linear decay, distributed source terms conditions. The results show excellent agreement two models, highlight effects decay phenomena various intensity. resulting approach constitutes computationally efficient tool extend capabilities CFD-based calculations simulation transport.