复杂核燃料组件共振参数计算研究

项目名称： 复杂核燃料组件共振参数计算研究

项目编号： No.10875094

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 数理科学和化学

项目作者： 吴宏春

作者单位： 西安交通大学

项目金额： 39万元

中文摘要： 为提高反应堆的安全性与经济性，人们在设计高性能新一代核动力反应堆和特殊用途反应堆时越来越多地采用更加复杂的核燃料组件，如：呈现不同复杂几何形状，或由多种几何形状复杂构成；燃料组件具有两重以上的非均匀结构，如高温气冷堆的燃料颗粒结构，呈现出多重非均匀性；燃料的裂变核素包括两种以上，如MOX燃料、钍循环燃料和核废料嬗变靶件等。本项目针对这些复杂因素系统地开展了燃料组件共振参数计算方法研究，具体包括：研制了基于非结构几何MOC方法的子群共振计算程序SUGAR；开发了基于MOC方法的超细群共振计算程序UFO；创新性提出了共振能区用小波函数展开非共振区用多群离散的耦合共振计算方法，并研制了程序WAVESON；构造了能反映复杂特征的共振计算5类基准题，并对以上3种方法进行了大量的数值验证。在此基础上，进一步研制了复杂燃料组件参数计算程序NECP-1.0，并对先进反应堆的复杂燃料组件进行了初步应用研究等。本项目研究成果解决了非结构几何、多重非均匀、多种共振核素干涉等共振计算难题，共发表SCI论文16篇，国际会议论文27篇，培养毕业了博士研究生6人，硕士研究生4人，正在培养在读博士生3人，硕士生5人。

中文关键词： 共振计算；燃料组件；非结构几何；多重非均匀；干涉效应

英文摘要： To increase the safety and benefit of nuclear reactor, the complex fuel assembly is being used widely during the designing of the new generation reactor and special reactor. For example, fuel cell maybe present in unsturctured geometry, or be combined by many different structured cells, or be mulriple heterogeneous like the fuel grain of HTGR, or include more than two fission unclei such as MOX fuel and transmutation target. Aim at these complex factors, a seris of resonance calculation methods are studied in this project. The results of this project include: A sub-group resonance calculation code SUGAR based on the MOC mehtod which is flexible for unstructured geometry is developed; A hype-fine group resonance calculation code UFO based on the MOC solver is developed; A new idea that expend the cross section and flux using the wavelet function during the resonance energy region is given. And the calculation code WAVESON is encoded; Five kinds of resonance calculation benchmark problems are constructured. and all above new developing codes are verified with these benchmark problems; Based on the developed resonance codes, a reactor fuel assembly calculation code NECP-1.0 is developed. And some new fuel assemblies are studied using this code. All numerical results show that the difficulty due to the unstructured geometry, mulriple heterogeneous and multi resonance nuclei is solved very successfully. This project published 16 SCI papers and 27 international conference papers. Under the support of this prject, there are 6 Ph.D. student and 4 master dgree student graduated. And there are 3 Ph.D. student and 5 master student will graduate soon.

英文关键词： Resonance calculation; Fuel assembly；Unstructured geometry; Mulriple heterogeneous; Interferential effect