Abstract
The stochastic dispersion of tristructural isotropic (TRISO)-coated particles brings challenge for accurate modeling and neutron transport analysis. Existed explicit modeling methods for stochastic media, like the random sequential addition (RSA) method and discrete element method (DEM), have difficulties in building dispersed particles that do not touch each other with packing fractions higher than 38%. In this paper, we proposed a new packing method for this kind of model by combining the optimized dropping and rolling (ODR) method and the virtual surface (VS) method. The testing results for different packing fractions indicate that our modified ODR method can improve the packing efficiency hundreds of times compared with the DEM. In addition, we successfully construct a stochastic geometry with no touching particle configuration. In this model, the packing fraction achieves 40%, demonstrating that our method is capable of handling model of no contact dispersed particles with a packing fraction higher than 38%.
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