第34卷第3期 2014年9月
核科学与工程
Nuclear Science and Engineering
Vol.34No.3
Sep.2014
蒙特卡罗粒子输运权窗减方差方法研究
及在ITER屏蔽分析中应用郑华庆，宋婧，郝丽娟，孙光耀，胡丽琴，FDS团队
（中国科学院核能安全技术研究所，安徽合肥230031)
摘要：屏蔽问题是象变中子学研究密切关注的问题，蒙特卡罗粒子输运中的权窗减方差技术是处理屏鼓计算深穿透难题的重要方法。本文对权窗减方差方法开展研究，并在超级蒙特卡罗计算软件SuperMC 中实现，先采用混凝土基准例题进行校验，再将该方法应用于国际热核聚变实验堆ITER的屏蔽分析，计算结果和MCNP进行对比，符合偏差要求，通过权窗减方差的应用，计算效率也有明显提升，证明了方法和程序的正确性和有效性。
关键词：蒙特卡罗；减方差；权窗；SuperMC;ITER；屏蔽计算
中图分类号：TL7
文章标志码：A
文章编号：0258-0918(2014)03-0353-05
WeightWindowsVarianceReduction inMonteCarloParticle TransportandItsApplicationinITERShieldingAnalysis
ZHENG Hua-qing,SONG Jing,HAO Li-juan, SUN Guang-yao, HU Li-qin,FDS Team
(Institute of Nucelear Energy Safety Technology, Chinese Academy of Sciences, Hefei, Anhui, 230031, China) Abstract: Radiation shielding is one of the most important points in the research of fusion neutronics. Weight windows variance reduction in Monte Carlo particle transport is an important method to deal with deep penetration problem in shielding calculation. Weight windows variance reduction was studied and implemented in Super Monte Carlo Calculation Program for Nuclear and Radiation Process (SuperMC). The concrete benchmark case and the fusion device shielding analysis case of ITER were selected as benchmark and application cases. Compared with calculated results of MCNP, the deviation of SuperMC met the requirement of deviation limit.With weightwindows,the FOM (Figure of Merit) of SuperMC increased obviously. The results indicated the accuracy and feasibility of the method and the code.
Key words: Monte Carlo; variance reduction; weight windows; SuperMC; ITER; 收稿日期：2014-01-13；修回日期2014-07-04
基金项目：中国科学院战略性先导科技专项（XDA03040000）；国家自然科学基金（91026004）；国家ITER973计划(2014GB112001)；安徽省自然科学基金（1308085QH138）
作者简介：郑华庆(1984一)，男，断江人，博士研究生，主要从事蒙特卡罗粒子输运计算研究工作
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