粗网节块内功率的重构  

Pin power reconstrucion methodology ofnodal coarse mesh calculations

作　　者：胡永明[1] 甘东 罗经宇[1] 

机构地区：[1]清华大学核能技术设计研究院,清华大学现代应用物理系

出　　处：《清华大学学报（自然科学版）》1995年第3期1-6,共6页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八五"科技攻关项目

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。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.

关 键 词：功率重构 反应堆 堆芯 粗网节块法 功率分布 

分 类 号：TL329[核科学技术—核技术及应用] TL326