双面冷却环形燃料元件的几何尺寸优化

针对双面冷却环形燃料元件,建立了计算元件内流量分配、温度场分布和径向最高温度位置沿元件轴向分布的相关数学物理模型,编制了热工水力计算程序,制定了评估环形燃料元件几何设计优劣性的3个评价指标,获得了双面冷却环形燃料元件的最优尺寸设计范围。计算结果表明,优化后的环形燃料元件具有良好的热工水力特性,优化后的几何尺寸与麻省理工学院选择的尺寸吻合良好,验证了程序的可靠性和正确性。

Geometric Size Optimization of Dual-cooled Annular Fuel Element

Based on the design of dual-cooled annular fuel elements, relevant mathematical and physical models were established to calculate the flow distribution, temperature field distribution and distribution of radial maximum fuel temperature positions along the axial direction, and a thermal-hydraulic calculation code was developed. Three evaluation indexes were independently proposed to evaluate geometric designs of dual-cooled annular fuel elements, and the ranges of optimal element sizes were obtained. Calculation results show that the optimized dual-cooled annular fuel element presents good thermal-hydraulic performance. The optimized geometric sizes agree well with those obtained by Massachusetts Institute of Technology, which demonstrates the code reliability and accuracy.