Development and Application of Core pin-by-pin Calculation of Sub-channel Analysis Code LINDEN
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摘要: 为实现子通道分析软件LINDEN的pin-by-pin计算功能，提高LINDEN软件开展堆芯热工水力分析的计算精度。本研究开发了全堆芯pin-by-pin计算自动建模功能，解决了大型稀疏矩阵的存储和求解问题，开展了157组件反应堆全堆芯pin-by-pin计算及分析。计算结果表明，LINDEN软件可以开展全堆芯pin-by-pin计算，获得堆芯内冷却剂温度分布、偏离泡核沸腾比（DNBR）、质量流速分布等关键热工水力参数的详细分布结果。相邻组件的功率差异会影响组件内的热工水力参数分布。
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关键词:
- 子通道分析 /
- 自动建模 /
- 大型稀疏矩阵 /
- pin-by-pin
Abstract: To realize the pin by pin calculation function of the sub-channel analysis code LINDEN and improve the accuracy of core thermal hydraulic analysis by LINDEN code, an automatic modeling function has been developed for the full core pin-by-pin calculation, and the storage and solution problems of large sparse matrices have been solved. The full core pin-by-pin calculation and analysis of 157 assemblies were carried out. The calculation results indicate that LINDEN can perform full core pin-by-pin calculations, and the detailed distribution results of key thermal hydraulic parameters such as coolant temperature distribution, DNBR, mass flow rate distribution can be obtained. The power difference between adjacent assemblies affects the distribution of thermal hydraulic parameters within the assembly.-
Key words:
- Sub-channel analysis /
- Automatic modeling /
- Large sparse matrix /
- pin-by-pin
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图 8 1号组件出口冷却剂温度分布
Figure 8. Temperature Distribution of Coolant at the Outlet of Assembly 1
图 9 50号组件出口冷却剂温度分布
Figure 9. Temperature Distribution of Coolant at the Outlet of Assembly 50
图 10 79号组件出口冷却剂温度分布
Figure 10. Temperature Distribution of Coolant at the Outlet of Assembly 79
图 11 子通道冷却剂焓值分布对比
Figure 11. Comparison of Coolant Enthalpy Distribution of Sub-channel
图 12 子通道冷却剂空泡份额分布对比
Figure 12. Comparison of Coolant Void Fraction Distribution of Sub-channel
表 1 堆芯布置与关键参数
Table 1. Geometirc Parameters of Test Section
参数 数值 燃料组件数量 157 燃料棒直径/mm 9.5 燃料棒加热长度/m 3.65 燃料棒中心距/mm 12.6 堆芯功率/MW 3113 堆芯流量/(kg·s−1) 12494.1 冷却剂入口温度/℃ 288.3 堆芯出口压力/MPa 15.5 
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