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.

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。

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Considering fuel assembly for PWR, it is possessed of dense lattice, complex geometry and strong absorption of neutron.

对于压水堆燃料组件而言，栅格稠密、几何形状复杂，对中子的吸收较强。

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In this work, a tight pitch lattice and mixed fuel assemblies pressured heavy water reactor concept was investigated.

在这项工作中，一种紧沟天窗与混合燃料集束压力重水反应堆的概念被调研。

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