基于解析节块法的三维多群六角形几何功率重构研究

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Study on Pin Power Reconstruction Method Based on 3-D Multi-Group Analytic Nodal Method for Hexagonal-z Geometry

1. Department of Engineering Physics, Tsinghua University, Beijing, 100084, China;
2. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610041, China

摘要: 解析节块法是将六角形节块内的每群中子注量率利用解析基函数展开,求得展开系数后可直接对六角形节块进行精细功率重构。应用上述理论模型,为堆芯程序HANDF-E编制了精细功率重构模块。利用VVER440基准题和三维4群热堆问题对该模块进行验证,并与多群蒙特卡罗程序MCMG进行比较。计算结果表明,该方法具有较高的计算精度。
- 解析函数展开节块法 /
- 功率重构 /
- HANDF-E程序
Abstract: Based on the theory that the hexagonal intra-nodal flux distribution can be expanded to a 3D-form in a series of analytic basic functions for each group,the analytic function expansion nodal method can be directly used for pin power reconstruction.Based on the proposed model,a module of pin power reconstruction has been developed for HANDF-E code.Compared with Monte Carlo code MCMG,the numerical results of VVER-440 benchmark and 3-D four-group thermal reactor benchmark show that HANDF-E can predict accurately the pin powers.
- Analytic function expansion nodal method /
- Pin power reconstruction /
- HANDF-E code