原子能科学技术2018，Vol.52Issue(3)：412-419,8.DOI:10.7538/yzk.2017.youxian.0365
针对球床的三维特征线方法几何建模研究
Geometry Modeling of 3D Method of Characteristics for Pebble-bed
摘要
Abstract
In MOC (method of characteristics),angular flux is calculated by sweeping over all the tracks densely arranged in the district.The sweeping process is independent of material distribution and geometry.As a result,the capability of treating different kinds of geometry structures of MOC is limited by the capability of geometry modeling modular.The geometry modular of the code MOCP (method of characteristics for high temperature pebble-bed reactor) was developed based on CSG (constructive solid geometry) method.The geometry modular of MOCP is capable of describing the stochastic distributed pebble-bed.The meshing method of spherical fuel was studied.The result shows that relative error of keff of a critical sphere is less than 0.1％ when the critical sphere is divided into more than 30 layers.Furthermore,the 3D ray tracing efficiency is greatly improved by optimizing the geometry tree and MOCP is able to arrange track on the different shapes of the geometries including cube,cylinder and sphere.关键词
特征线方法/输运计算/体素构造方法/球床高温气冷堆Key words
method of characteristics/neutron transport/constructive solid geometry/pebble-bed HTR分类
能源科技引用本文复制引用
郭建,郭炯,王黎东,卢佳楠,牛进林,王毅箴,邬颖杰,李富..针对球床的三维特征线方法几何建模研究[J].原子能科学技术,2018,52(3):412-419,8.基金项目
国家科技重大专项资助项目(ZX06901) （ZX06901）
国家自然科学基金资助项目(11375099) （11375099）
863计划资助项目(2014AA052701) （2014AA052701）
