原子能科学技术2017，Vol.51Issue(10)：1806-1812,7.DOI:10.7538/yzk.2016.youxian.0838
钠冷快堆乏燃料组件自然循环冷却瞬态过程的数值模拟研究
Numerical Simulation and Investigation on Natural Circulation Cooling Transient Process for Spent Fuel Assembly in Sodium-cooled Fast Reactor
周志伟 1杨红义 1冯预恒 1李淞1
作者信息
- 1. 中国原子能科学研究院 反应堆工程技术研究部,北京 102413
- 折叠
摘要
Abstract
The natural circulation cooling transient process for the spent fuel assembly in sodium-cooled fast reactor was investigated by Fluent code. The thermal-hydraulic phenomena and their change trends in the spent fuel assembly internal coolant channel and external flow field were acquired.The results show that the method dividing the grids of spent fuel rod gap into winding wire grids and flow field grids around winding wire is able to generate high quality structured grids in the region of spent fuel assembly.In natural circulation cooling transient process with Ar,the increase of argon flow velocity in inner sub-channels is lagged behind wall sub-channels,and the tempera-ture of inner sub-channels rises faster consequently.The axial temperature distribution of spent fuel assembly is characterized with the higher temperature in the central region and the lower temperature near the edge region.The time should not be more than 6 minutes after the spent fuel assembly is placed in argon,in order to avoid the tempera-ture of spent fuel assembly shell exceeding the design value.关键词
钠冷快堆/乏燃料组件/数值模拟/自然循环/热工水力Key words
sodium-cooled fast reactor/spent fuel assembly/numerical simulation/nat-ural circulation/thermal-hydraulics分类
能源科技引用本文复制引用
周志伟,杨红义,冯预恒,李淞..钠冷快堆乏燃料组件自然循环冷却瞬态过程的数值模拟研究[J].原子能科学技术,2017,51(10):1806-1812,7.
