Sub-Channel Analysis of TRU Fuel Fabrication Coupled with Multi-Dimensional Thermal Hydraulics
In a fabrication of low decontaminated fuel, in which a trans-uranium (TRU) is included, fuel pins with thin spirally-wrapped wire are laid horizontally and coolant air is to be fed from the bottom to remove a decay heat. In order to investigate thermal hydraulics in the fuel bundle during the fabrication, a sub-channel analysis method has been developed. Since a boundary condition is embedded close to an outermost fuel pin in the sub-channel analysis, it is not easy to estimate an influence of natural convection when it occurs at the top of the fuel bundle. In the present study, two-dimensional thermal-hydraulic simulation is coupled with the sub-channel analysis so as to investigate a multi-dimensional effect due to natural convection. The regions of two-dimensional simulation are added independently in layers where the natural convectional effect plays an important role considering a computational cost. As a result of the comparison between the present coupling method and the sub-channel analysis in which an empirical correlation of natural convectional heat transfer is added at the outermost boundary and the experimental observation, it is confirmed that the present method has an advantage to investigate the influence due to natural convection numerically.
Trans-uranium (TRU) fuel Sub-channel analysis Thermal hydraulics Computational fluiddynamics Fast breeder reactor
T. Takata Yamaguchi K. Hishida K. Ikeda K. Itoh
Osaka University 2-1 Yamada-oka, Suita, Osaka, 5650871, Japan Keio University 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa, 2328522, Japan Nuclear Development Corporation 622-12 Funaishikawa, Tokai-mura, Ibaraki, 3191111, Japan
国际会议
上海
英文
2106-2117
2010-10-10（万方平台首次上网日期，不代表论文的发表时间）