中子时空动力学计算程序CORCA-K的进展

发布时间：2018-04-04 18:20

本文选题：三维　切入点：瞬态　出处：《强激光与粒子束》2017年06期

【摘要】：主要介绍了自主化中子时空动力学程序CORCA-K的相关研发进展。CORCA-K程序是中核集团自主研发的NESTOR软件包中的三维瞬态中子学计算软件。其核心功能是采用数值计算方法,求解三维瞬态中子扩散方程。其空间离散采用第二类边界条件节块格林函数方法,与三维稳态扩散计算程序CORCA-3D保持自洽性;时间离散采用对角线隐式龙格库塔格式,可在向后欧拉格式的基础上叠加实现,且具备时步自适应功能。以三维LMW基准问题、三维LRA基准问题和秦山核电厂3号机组第5循环为计算对象,开展了瞬态计算验证。结果表明,CORCA-K计算结果与参考程序符合较好,且在保证计算精度的条件下,具有更高的计算效率。
[Abstract]:This paper introduces the research and development of the autonomic neutron space-time dynamics program CORCA-K. CorCA-K program is a three-dimensional transient neutronics calculation software in the NESTOR software package developed by China Nuclear Group.Its core function is to solve the three dimensional transient neutron diffusion equation by numerical method.The spatial discretization is based on the second boundary condition nodal Green's function method, which is self-consistent with the three-dimensional steady-state diffusion program CORCA-3D, and the diagonal implicit Runge-Kutta scheme is used in the time discretization, which can be superimposed on the backward Euler scheme.And has the time-step adaptive function.The three dimensional LMW datum problem, three dimensional LRA reference problem and the fifth cycle of unit 3 of Qinshan Nuclear Power Plant are taken as the objects of calculation, and the transient calculation verification is carried out.The results show that the calculation results of CorCA-K are in good agreement with the reference program, and the calculation efficiency is higher under the condition of ensuring the calculation accuracy.
【作者单位】：核反应堆系统设计技术重点实验室;
【基金】：数字化反应堆项目
【分类号】：TL329.2

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