反应堆pin-by-pin精细建模工具开发

Development of Modeling Tools for pin-by-pin Precise Reactor Simulation

为开展大规模(如反应堆全堆芯pin-by-pin)输运模拟计算,北京应用物理与计算数学研究所研制了中子-光子耦合输运程序JMCT和支撑框架程序JCOGIN,如何快速、方便地建立物理模型是缩短问题模拟周期的关键。目前在粒子输运领域,国内外均开展了基于CAD系统的可视建模工具的开发工作。本文介绍了基于领域的可视建模工具的开发思路,结合领域知识,开发了方便、快捷的组件;为解决大规模几何建模的存储和转换问题,实现了层次化几何树的数据结构和转换算法;并实现了自动将模型输出为JMCT计算输入文件。使用该工具建立了大亚湾全堆芯模型,并进行了计算,验证了可视建模工具输出模型的正确性。

In order to develop large-scale transport simulation and calculation method （such as simulation of whole reactor core pin-by-pin problem）, the Institute of Applied Physics and Computational Mathematics developed the neutron-photon coupled transport code JMCT and the toolkit JCOGIN. Creating physical calculation model easily and efficiently can essentially reduce problem solving time. Currently, lots of visual modeling programs have been developed based on different CAD systems. In this article, the developing idea of a visual modeling tool based on field oriented development was introduced. Considering the feature of physical modeling, fast and convenient operation modules were developed. In order to solve the storage and conversion problems of large scale models, the data structure and conversional algorithm based on the hierarchical geometry tree were designed. The automatic conversion and generation of physical model input file for JMCT were realized. By using this modeling tool, the Dayawan reactor whole core physical model was created, and the transformed file was delivered to JMCT for transport calculation. The results validate the correctness of the visual modeling tool.