燃料棒周向导热对超临界水堆堆芯子通道分析的影响

摘要

In order to analyze the effects of the circumferential heat conduction in fuel rods on supercritical water-cooled reactor (SCWR) fuel assembly, the model of 3D fuel heat conduction was included in the sub-channel analysis code. The results of steady-s'tate calculation of two kinds of SCWR-M fuel assembly show that: The circumferential heat conduction in fuel rods can not be neglected in fuel assembly of thermal zone; the circumferential heat conduction in fuel rods can be neglected in fuel assembly of fast zone.%本文在子通道程序的燃料棒模型中引入三维导热方程,使该模型能用来模拟燃料棒的周向导热情况.采用改造后的子通道程序对混合谱超临界水堆设计中的两种燃料组件结构进行计算分析,研究燃料棒周向导热对超临界水堆燃料组件子通道分析的影响.结果表明:热谱组件的子通道计算中,燃料棒周向导热的影响不能忽略;快谱组件的子通道计算中,燃料棒周向导热的影响基本可忽略.