Abstract：The preparation of coated fuel particles using fluidized bed-chemical vapor deposition (FB-CVD) is one of the key processes in the production of fuel elements for high-temperature gas-cooled reactors.The characteristics of the particle coating process were predicted using a multi-physics,multi-scale,coupled CFD-DEM-CVD model to predict the velocity,temperature,and concentration fields for the CVD method in fluidized beds.Then,the coating method was modeled using a chemical reaction flow model to simulate the decomposition and deposition of the chemical substances with the population balance model used to solve for the size distribution of the deposited components and the inner bonding particle model used to predict the changes in the coating particle density.This coating model was used to simulate various cases with the simulation results in good agreement with experimental data.This coating model can be used to study the particle coating process and optimize coating processes for industrial production.
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2022, Vol. 62 
