OS8-7 個別要素法を用いた粒子燃料充填過程の擬似三次元モデルの開発(OS8 軽水炉・新型炉・核燃料サイクル,循環型社会における動力エネルギー技術)

概要

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Vibration-based packing of sphere-pac fuel is a key technology in a nuclear fuel manufacturing. In the production process of sphere-pac fuel, a Mixed Oxide (MOX) fuel is formed to spheral and is packed in a cladding tube by adding a vibration force. In the present study, we have developed a numerical simulation method to investigate the behavior of the particles in a vibrated tube using the Distinct Element Method (DEM). In general, the DEM requires a significant computational cost. Therefore we propose a new approach in which a small particle can move through the space between three larger particles even in the two-dimensional simulation. We take into account an equivalent three-dimensional effect in the equations of motion. Thus it is named pseudo three-dimensional modeling.
社団法人日本機械学会の論文
2007-06-13