COSINE软件包堆芯物理分析程序CORE开发与初步测试验证

堆芯物理分析程序CORE是1个少群、一维、二维、三维稳态节块法程序，用于压水堆堆芯设计和分析。COSINE软件包是大型压水堆国家重大专项软件自主化课题中的一部分，CORE是COSINE软件包的1个子程序系统，CORE第1版采用节块展开法（NEM）进行二维、三维扩散计算，采用差分法进行一维扩散计算，截面处理采用插值表的方式，燃耗计算采用带预估修正的宏观燃耗计算方法，精细功率重构采用调制方法。目前CORE的核心模块已完成，并进行了初步测试验证，结果表明其扩散求解模块基本满足功能和精度要求。

Development and Preliminary Verification of Core Physics Analysis Code CORE of COSINE Code Package

CORE is a few group 1D/2D/3D steady state nodal code, which can be used for PWR core design and analysis. Core and system integrated engine for design and analysis (COSINE) is the newly approved NPP software R&D key project in China. Core analysis code CORE is an essential subsystem of COSINE code package. In the current version of CORE, the diffusion solver is composed of nodal expansion method (NEM) for 2D/3D problems and the finite difference method for 1D problem. Macro cross sections are interpolated from the pre-calculated XS table. For depletion calculation, the predictor-corrector macro depletion method is used. For pin power reconstruction, the modulate method is adopted. At present, the key modules of CORE have been completed, and the preliminary verification has been done. The result shows that the basic functions and accuracy of the diffusion solution module can meet the requirements.