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粗网节块程序如ＮＧＦＭ、ＳＩＭＵＬＡＴＥ等只能给出平均功率。而反应堆设计中更关心的是堆芯内燃料元件的功率分布。本文讨论了获得堆内元件功率分布的重构方法。双二次多项式用于快群中子通量展开，与双曲函数项结合的双二次多项式用于热群中子通量密度展开。研究了２１项和１３项展开法，并与ＣＩＴＡＴＩＯＮ细网格计算进行比较。结果表明，本文中研制的２１项方法程序ＲＥＣＯＮ比ＳＩＭＵＬＡＴＥ－３ＮＥＭＯ程序中所用的１３项方法精确得多，在外围区域更明显。
The coarse network section program such as NGFM, SIMULATE, etc. can only give the average power. What is more concerned with reactor design is the power distribution of the fuel elements in the core. This article discusses the reconstruction method for obtaining the power distribution of components in a stack. Biquadratic polynomials are used for fast group neutron flux unfolding. Biquadratic polynomials combined with hyperbolic function terms are used for thermal group neutron flux densification. 21 and 13 expansion methods were studied and compared with the CITATION fine grid calculation. The results show that the RECON method of 21 methods developed in this paper is much more accurate than the 13 methods used in SIMULATE-3NEMO program and more obvious in the peripheral area.