基于SP_(3)方法的动力堆中子噪声分析程序研究  

Development of a Neutron Noise Simulator with SP_(3) Approximation

作　　者：龚禾林[1] 陈长[1] 赵文博[1] 彭星杰 李庆[1] 于颖锐[1] GONG Helin;CHEN Zhang;ZHAO Wenbo;PENG Xingjie;LI Qing;YU Yingrui(Nuclear Power Institute of China Science and Technology on Reactor System Design Technology Laboratory,Chengdu of Sichuan Prov.610041,China)

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术国家级重点实验室,四川成都610041

出　　处：《核科学与工程》2021年第3期491-499,共9页Nuclear Science and Engineering

基　　金：国家自然科学基金资助项目(11905216)。

摘　　要：本文基于SP_(3)方程和有限元方法研制了中子噪声分析程序CORCA-NOISE。以国际原子能机构发布的三维压水堆基准例题对程序进行了测试,数值结果表明该程序对通量、keff等稳态参数的计算具有很高的精度。在此基础上基于IAEA 2D基准例题对中子噪声分析进行了初步的计算,给出了在给定输入扰动条件下的中子噪声振幅、相位的空间分布。本程序的研发为下一步深入研究动力堆中子噪声问题打下了基础。In this paper,the development of a neutron noise simulator CORCA-NOISE is reported which is based on the SP_(3) approximation and the finite element method.The SP_(3) approximation of the neutron transport equation allows improving the accuracy for both static and transient simulations for reactor core analysis compared with the neutron diffusion theory.Typical steady state parameters,i.e.,the neutron flux and keff,are calculated with high accuracy.Finally,the distribution of the neutron noise and the spectrum are calculated for the PWR IAEA 2D benchmark problem.The noise amplitude and the phase distribution under given frequency is given.

关 键 词：CORCA-PIN CORCA-NOISE SP_(3) 中子噪声 有限元 

分 类 号：TL48[核科学技术—核技术及应用]