离散纵标与蒙特卡罗耦合方法在反应堆屏蔽计算中的应用  

Application of Discrete Ordinate and Monte-Carlo Coupling Method for Reactor Shielding Calculation

作　　者：肖锋[1] 应栋川[1] 章春伟 吕焕文[1] 李兰[1] 

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610041 [2]中核核电运行管理有限公司二厂,浙江海盐314300

出　　处：《核动力工程》2014年第5期9-12,共4页Nuclear Power Engineering

摘　　要：建立基于离散纵标方法计算程序DOT以及蒙特卡罗方法计算程序MCNP的耦合方法。通过为MCNP程序SSR命令提供二进制源描述文件,实现在不重新编译MCNP程序条件下的离散纵标与蒙特卡罗耦合。在600 MW核电厂反应堆堆坑小室屏蔽计算中应用耦合方法的计算结果验证该方法的正确性。在耦合方法中研究探索源偏倚策略的实现方式,计算结果表明,源偏倚技术应用与离散纵标与蒙特卡罗耦合方法计算中,能有效降低统计方差,提高计算效率。A coupling calculation method based on the discrete ordinate method code DOT and Monte-Carlo method code MCNP was realized. By automatically providing a binary source specification file for the surface source function of MCNP （i.e. SSR command）, this coupling method was achieved and subsequently the necessity of re-compiling of MCNP code was eliminated. This coupling method was applied in the shielding problem of rooms around the pit of reactor cavity and a good agreement was obtained between the calculation and measurement results, which validated the correctness of this coupling method. Further more, source bias method was implemented in this coupling method, which shows great efficiency in variance reduction and the imorovements of calculation efficiency

关 键 词：离散纵标 蒙特卡罗 粒子输运 耦合计算 源偏倚 反应堆屏蔽 

分 类 号：TL329[核科学技术—核技术及应用]