2238 高稠密格子水冷却炉心の除熱技術の開発 (3) : 3 次元二相流解析技術開発の現状

概要

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The Reduced-Moderation Water Reactor (RMWR) adopts a tight-lattice core with triangular fuel rod arrangement and remarkably narrow gap spacing between rods. The criteria of boiling transition (BT) is one of most important subjects for such reactor but there has been no sufficient information from previous experimental or analytical studies about the effects of the gap spacing, grid spacer shapes and so on for the BT characteristics. Thus, we start to develop a mechanistic BT model using advanced numerical simulation technology to resolve the geometry effects. In this paper, we describe the outline of newly developed 3-D two-phase flow simulation method and show an example to investigate the spacer effect in the annular-mist flow.
社団法人日本機械学会の論文
2003-08-05