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介绍堆芯功率分布扩展的逐层面耦合法理论模型和逐次超松弛迭代求解方程组的方法。利用FORTRAN90语言编制堆芯功率分布扩展程序EXP,然后用大亚湾核电站1号机组第11循环理论计算和实测数据,对扩展计算结果进行敏感性分析和验证。结果表明:该方法利用理论计算功率建立起全堆芯各组件的耦合关系,利用实测功率对全堆芯各组件功率进行求解,进而完成功率分布扩展计算的方法是正确有效的,对测点失效情况有较好的适应性。
The theoretical model of layer-by-layer coupling method and the method of iterative over-relaxation iteration are introduced to describe the expansion of core power distribution. The FORTRAN90 language is used to compile the core power distribution expansion program EXP. Then, the 11th cycle theoretical calculation and measured data of Unit 1 of Daya Bay Nuclear Power Station are used to analyze and verify the extended calculation results. The results show that this method uses the theoretical calculation of power to establish the coupling relationship of all components of the reactor core. Using the measured power to solve the power of all components of the reactor core, the method of calculating the power distribution expansion is correct and effective. The situation has better adaptability.