数值反应堆及CVR1.0研究进展

数值反应堆是基于先进耦合建模技术、大规模并行计算技术、先进的验证与确认（V&V）等技术，建立在超级计算机上，可实现实际反应堆各种物理过程高精细模拟预测的复杂软件系统。它是实际反应堆“外在”和“内在”的镜像，是先进的核反应堆设计优化、高效运行、事故预测和应急以及新材料研发等的试验验证平台。本文在简略综述国内外典型数值反应堆研究成果的基础上，描述了本课题组近期开发的数值反应堆核心软件组成体系，分析了数值反应堆对计算资源和存储资源的需求，并介绍了目前正在开展的中国数值反应堆原型系统（CVR1.0）的研究进展。进展主要包括：两相子通道热工水力模拟软件、单相CFD热工水力模拟软件、多尺度材料辐照损伤模拟软件、直接3D中子输运特征线法模拟软件，以及这些软件与欧美CASL、NEAMS、RPV等相关软件的对比和在神威、曙光等超级计算机上的测试结果。

Research Progress of China Virtual Reactor (CVR1.0)

The virtual nuclear reactor is a sophisticated software system deployed on supercomputers to simulate physics processes or predict component behaviors inside real reactors. It heavily relies on advanced modeling and coupling methods, high performance computing and advanced verification and validation (V&V) techniques. It is supposed to provide an experimental verification platform for the design optimization of advanced nuclear reactors, efficient operation, accident prediction, emergency planning, and the development of new materials. In a word, the system is an “external” and “internal” mirror image of real reactors. Based on a brief overview of the research results of typical virtual nuclear reactors at home and abroad, the core software component of virtual nuclear reactor was explained, the high requirements for computing speed and storage were analyzed, and the recent achievements of the prototype of China Virtual Reactor (CVR1.0) were presented in this paper. The recent achievements of CVR1.0 contain some of its simulation tools including the two-phase sub-channel thermal hydraulic simulation software, the single-phase CFD thermalhyd-raulic simulation software, the multi-scale materials irradiation damage simulation software, and the method of characteristics software for direct 3D neutron transport simulation. Comparisons among these tools and their counterparts from CASL, NEAMS, and RPV in the U.S.A or Europe are made and listed concisely, as well as the results of performance analyses on supercomputers such as Sunway and Sugon series.