面向三维辐射屏蔽最优化的快速自动建模方法研究

项目名称： 面向三维辐射屏蔽最优化的快速自动建模方法研究

项目编号： No.11305205

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 龙鹏程

作者单位： 中国科学院合肥物质科学研究院

项目金额： 29万元

中文摘要： 辐射屏蔽最优化是核装置工程设计的核心内容之一。基于粒子输运模拟的自动寻优是设计高质量屏蔽方案的重要保证。随着计算机技术和高性能算法的不断发展、新型复杂核装置概念（如先进裂变堆、混合堆、聚变堆等新型堆）的不断提出，基于三维精细粒子输运模拟的高几何复杂度屏蔽问题的精细分析需求以及条件日益成熟。虽然，面向三维粒子输运模拟的计算自动建模技术已逐步实用化，但是，辐射屏蔽最优化对复杂几何的建模效率提出了更高要求，需要将针对中等复杂规模几何的建模效率从数小时降低到分钟量级，甚至到秒级。本项目将结合不同建模方法的特点、典型核装置的几何特性，充分利用粒子输运计算的硬件环境，研究粒子输运计算自动建模的加速技术；研究基于特征识别与规则库技术的快速建模方法，将单个几何体的建模时间降低到秒量级；研究结合输运计算环境特点（多节点，多核，且可能包含GPU）的混合并行加速方法，实现分钟量级的快速自动建模。

中文关键词： 辐射屏蔽最优化；粒子输运；自动建模；特征建模；快速建模

英文摘要： Radiation shielding optimization is one important part to nuclear facility design. Radiation transport simulation based automatic optimization is crucial to high quality shielding design. As increasingly development of computer technologies and high-performance computing algorithms, and presentation of innovative complicated nuclear facilities, such as advanced fission reactors, hybrid reactors and fusion reactors, it is increasingly urgent and feasible to perform shielding optimization based on 3D accurate simulation for shielding problems with complex geometries. Automatic modeling for 3D radiation transport simulation is almost applicable, but the modeling time should be reduced to minute scale to meet the requirement of radiation shielding optimization. This proposal will focus on the rapid modeling approach combining with the feature of different modeling methods and the geoemtry feature of classic nuclear facilies. Feature recognition and rule bases technique based rapid modeling method will be studied to limit the modeling time for single geometry to millisecond scale. And by utilizing the computing resource of radiation transport simulation, hybird parallel acceleration method combining multi-node, multi-core and GPU will be studied to realize minute-scale rapid modeling for 3D radiation transport shield

英文关键词： radiation shielding optimization；particle transport；automatic modeling；feature modeling；rapid modeling