并联通道瞬态流量分配方法研究

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Research on Transient Flux Distribution in Parallel Channels

National Defense Key Subject Laboratory for Safety and Simulation Technology, Harbin Engineering University, Harbin, 150001, China

摘要: 应用多通道模型对闭式燃料栅格反应堆进行热工水力分析时,首先需要解决流量分配问题。本文提出了3种流量分配方法,编写了瞬态流量分配程序,求解了1个并联通道流量分配问题,并对这3种方法做了计算对比。结果表明,方法1只适合流量缓慢变化工况;而方法2和方法3适用于流量剧烈变化工况;但在计算同一工况时方法3比方法2更稳定;因此,方法3可作为板状燃料堆芯冷却剂通道流量分配的计算方法。
- 并联通道 /
- 流量分配 /
- 闭式燃料栅格
Abstract: When multi-channels model is used for thermal-hydraulic analysis in reactors with closed fuel lattice,the mass flux distribution must be solved at first.Three methods for mass flux distribution are proposed.Transient flux distribution program is developed to calculate the mass flux distribution in parallel channels and the results are compared.The results show that the first method is only proper for slow transients but the second and the third methods are also proper for fast transients.However,the stability of the third method is higher than the second method.So the third method can be used for mass flux distribution calculation in plate type fuel parallel channels.
- Parallel channels /
- Mass flux distribution /
- Closed fuel lattice