| 粗网节块内功率的重构 |
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| 引用本文： | 胡永明,甘东,罗经宇.粗网节块内功率的重构[J].清华大学学报(自然科学版),1995(3). |
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| 作者姓名： | 胡永明 甘东 罗经宇 |
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| 作者单位： | 清华大学核能技术设计研究院，清华大学现代应用物理系 |
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| 基金项目： | 国家“八五”科技攻关项目 |
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| 摘 要： | 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。
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| 关 键 词： | 功率重构，节块程序，多项式展开，不连续因子 |
Pin power reconstrucion methodology ofnodal coarse mesh calculations |
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| Hu Yongming, Gan Dong,Luo Jingyu.Pin power reconstrucion methodology ofnodal coarse mesh calculations[J].Journal of Tsinghua University(Science and Technology),1995(3). |
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| Authors: | Hu Yongming Gan Dong Luo Jingyu |
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| Abstract: | he nodal codes such as NGFM and SIMULATE can only give the nodal averagepower distributions of a reactor core. But the pin power distribution of the reactor core ismore interesting for the nuclear reactor design. The reconstrucion methods to obtain the finepin power distribution in a reactor core are discussed in this paper. A bi-quartic polynomial isused for the fast-group flux expansion and a bi-quartic polynomial combined with hyperbolicterms is used for the thermal flux.The investigated expansions with 21-term and with 13term are compared with the results from CITATION fine mesh calculations. It is found thatthe 21-term code RECON is more accurate than the 13--term one,which is used inSIMULATE-3 and NEMO codes, especially in the peripheral regions. |
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| Keywords: | pin power reconstrucionl nodal codel polynomial expansion discontinuousfactor |
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