MCNP程序几何描述能力扩展及应用测试  

Extension and Test of Limits on MCNP Geometry Description

作　　者：刘镇洲[1] 李刚[1] 邓力[1] 柴晓明[2] 

机构地区：[1]北京应用物理与计算数学研究所,北京100094 [2]中国核动力研究设计院,四川成都610041

出　　处：《原子能科学技术》2013年第3期458-461,共4页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(61033009;91118001);国家重点基础研究发展计划资助项目(2011CB309702);国家高技术研究发展计划资助项目(2012AA01A309;2012AA01A303);中国工程物理研究院基金资助项目(2011A0103006)

摘　　要：为使MCNP程序能模拟数百万规模的反应堆"pin-by-pin"问题和医学体素模型,本文对MCNP程序进行了改进,使几何块、几何面数量可扩展。改进后的程序对硼中子俘获治疗(BNCT)的人体大脑进行几何建模,栅元数量达百万量级;计算了大脑的中子、光子吸收剂量率随深度的变化,为大脑BNCT提供理论支持。此外,对百万规模的"Like n But"重复结构模型进行了串、并行测试,验证了几何规模扩展后程序计算的正确性。To set up models for ＇pin-by-pin＇ facilities（reactors） and human phantoms with millions of cells by using the MCNP code,the MCNP code was modified and limits on the number of cell,surface,material,etc.were extended.The Snyder head phantom for boron neutron capture therapy was modeled.Neutron and induced gamma-ray absorbed dose in human brain was calculated.Besides,a critical calculation model of repeated structures described by the ＇Like n But＇ cards was calculated employing both series and parallel computing.As a conclusion,modifications of the MCNP code were proved to be correct.

关 键 词：MCNP 几何规模 扩展 重复结构 硼中子俘获治疗 

分 类 号：O571.51[理学—粒子物理与原子核物理]