基于严格两步法的停堆剂量率计算程序的基准分析  

Benchmark analysis of shutdown dose rate calculation program based on R2S method

作　　者：张显 刘仕倡 卢棚 张小康 全国萍 陈义学[1] ZHANG Xian;LIU Shichang;LU Peng;ZHANG Xiaokang;QUAN Guoping;CHEN Yixue(School of Nuclear Science and Engineering,North China Electric Power University,Beijing 102206;Institute of Energy,Hefei Comprehensive National Science Center,Hefei 230031;State Power Investment Corporation Science and Technology Research Co.Ltd.,Beijing 102209)

机构地区：[1]华北电力大学核科学与工程学院,北京102206 [2]合肥综和性国家科学中心能源研究院(安徽省能源研究室),合肥230031 [3]国家电投集团科学技术研究院有限公司,北京102209

出　　处：《辐射防护》2023年第S01期20-24,共5页Radiation Protection

基　　金：国家自然科学基金资助项目(12175067);河北省自然科学基金(A2022502008);中央高校基本科研业务费专项资金(2022JG002)。

摘　　要：基于蒙卡程序cosRMC的网格计数功能,开发了以严格两步法为核心的停堆剂量率计算程序,通过耦合粒子输运计算和活化分析计算,精确求解停堆剂量场。其中,采用ALARA程序开展活化分析计算,将程序应用于ITER诊断窗口计算基准题上,开展了充分的计算分析,并与其他严格两步法程序计算得到的停堆剂量率结果有较好的一致性。另外,由于聚变装置几何十分复杂,结构网格难以准确描述几何结构,往往一个网格包含多个栅元,此时网格的通量平均对停堆剂量率的精度会带来不好的影响,而非结构网格具有良好的几何适应性,因此,基于非结构网格对停堆剂量率程序作了进一步开发,并在基准题上开展计算分析,验证了程序基于非结构网格计算停堆剂量率的可靠性。Based on the lattice counting function of the Monte Carlo program cosRMC,this paper developed a shutdown dose rate calculation program with a strict two-step method as the core.Through coupling particle transport calculation and activation analysis calculation,the shutdown dose field was accurately obtained.The ALARA program was used to carry out activation analysis and calculation.In this paper,the program is applied to the calculation benchmark of ITER diagnostic window,and a full calculation analysis is carried out,which is in good agreement with the shutdown dose rate results calculated by other programs.In order to improve the efficiency of particle transport calculation,the parallel calculation method and the global weight window variance reduction algorithm are applied in the program calculation.In addition,due to the fusion device geometry is complex,the lattice structure is difficult to accurately describe the geometric structure,a lattice often contains more than one cell,at this time of the lattice flux average to shut down the accuracy of dose rate will bring bad effect,rather than the lattice structure has a good adaptability,geometry,therefore,this work is based on unstructured lattice made further development program for shutdown dose rate,The reliability of the program for calculating shutdown dose rate based on unstructured lattice was verified.

关 键 词：停堆剂量率 严格两步法 cosRMC ALARA 非结构网格 

分 类 号：TL38[核科学技术—核技术及应用]