三代压水反应堆堆芯建模方法研究

Research on Core Modeling Methodology for Generation III Pressurized Water Reactors

核心软件自研是解决我国核电技术“卡脖子”问题的关键途径之一。针对当前堆芯仿真软件多为国外软件的现状,开展三代压水反应堆堆芯建模方法研究。基于“两步法”思想,利用时间和空间离散方法,解决了三维时空中子动力学方程求解难题,自主开发了三维时空中子动力学程序,实现了高精度中子学物理计算。开展单元测试和集成测试。测试结果表明,建立的中子动力学程序具有较好的精准性和计算效率,能够实现仿真装置对核电站各类工况的分析、预测。研究成果可广泛应用于核电站堆芯物理仿真领域。

Self⁃research of core software is one of the keyways to solve the“necklace”problem of China’s nuclear power technology.Aiming at the current situation that most of the core simulation software is foreign software,the core modeling method of generationⅢpressurized water reactor is researched.Based on the idea of“two⁃step method”,the problem of solving three⁃dimensional space⁃time neutron dynamics equations by using time and space discrete method has solved,and independently developed three⁃dimensional space⁃time neutron dynamics program,which realizes high⁃precision neutron physics calculation.Unit test and integration test are carried out.The test results show that the neutron dynamics program has good accuracy and computational efficiency and is capable of analyzing and predicting various working conditions of nuclear power plants by the simulation device.The research results can be widely used in the field of nuclear power plant core physics simulation.