摘要
堆用蒙特卡罗程序(RMC)不断被研发以适应于反应堆大规模精细模拟计算。在临界计算中,反应堆中子注量率、功率密度等分布不均匀导致其统计偏差的波动性增大,进而导致反应堆物理对称区域计算结果出现不对称性。蒙特卡罗堆芯计算不对称性主要由统计方差造成,减小方差波动可降低堆芯计算不对称程度。本工作在RMC临界计算中增加均匀裂变源方法,并对Hoogenboom-Martin基准题进行计算验证。结果表明,改进的方法在降低堆芯方差波动性与低功率区域方差方面效果显著。
Reactor Monte Carlo code（RMC）was constantly developed for reactor largescale precise analog calculation.In criticality calculation,the maldistribution of reactor neutron flux and power density lead to greater volatility in statistical bias,causing asymmetries in the computed results of reactor physical symmetry zones.Computation asymmetries in Monte Carlo codes are mainly caused by statistical variance,which can be reduced through decreasing variance volatility.In this study,uniform-fission-site method was added into RMC criticality calculation,with Hoogenboom-Martin benchmark verified by calculations.The result shows that the modified algorithm can significantly reduce the variance volatility of reactor cores and the variance of low power regions.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2017年第7期1232-1238,共7页
Atomic Energy Science and Technology
基金
国家国际科技合作专项资助(2014DFA60650)
关键词
RMC
均匀裂变源方法
方差
不对称性
reactor Monte Carlo code
uniform-fission-site method
variance
asymmetry
作者简介
吴屈（1993-），男，安徽安庆人，博士研究生，反应堆物理专业
