Abstract A sub-channel code capable of modelling the flow blockage of the annular fuel has been developed and verified by the experiment. A fuel conduction model has been developed for the blockage to consider the effect of the blockage on the temperature distribution of the fuel. Blockage at different position has been modeled and the middle blockage is selected as the calculation object. Blockage of inner and outer channel with different blockage rate has been calculated and the results of fuel temperature distribution, the heat split, the mass flow rate and the DNBR distribution has been obtained. Based on the analysis of the results, the blockage of inner and outer channel will have different effects on mass flow and heat split of the fuel, and the blockage of inner channel has a greater impact on DNBR and fuel temperature than that of outer channel.

中文翻译：

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堵流条件下环形燃料热工水力分析程序的开发

摘要 开发了一种能够模拟环形燃料流动阻塞的子通道代码，并通过实验验证。已经为堵塞开发了燃料传导模型，以考虑堵塞对燃料温度分布的影响。对不同位置的堵塞进行建模，选择中间堵塞作为计算对象。计算了不同堵塞率的内外通道堵塞情况，得到了燃料温度分布、热分流、质量流量和DNBR分布的结果。根据结果​​分析，内外通道的堵塞对燃料的质量流量和热分解会产生不同的影响，