Effects of Thermal Expansion Mismatch on Solid Breeder Blanket Pebble Bed and Structural Clad Thermomechanics Interactions

摘要

In this paper, a thermomechanical interaction of a ceramic breeder pebble bed and structural plate is studied based on a recently developed discrete numerical simulation code. The calculations take into account the coupling effect between structural wall deformation and pebble bed deformation, which greatly increases the computing time and complicates the computational procedures in determining the particle-wall contact characteristics. Specifically, the model is applied to a lithium orthosilicate packed bed for the evaluation of the deformation of a circular plate due to bed thermal expansion, while the results are compared with SCATOLA's experimental data.