激光聚变实验装置屏蔽性能模拟计算
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摘要
主要采用了蒙特卡罗方法对激光聚变实验装置外表面的中子和光子能谱及剂量进行模拟与分析,引入了MCAM软件绘制激光聚变实验装置的三维模型图,并自动转化为MCNP的输入文件,进行了靶室屏蔽性能的蒙卡模拟,从辐射防护的角度为屏蔽系统的建立、人员的辐射防护以及靶室材料的选择提供理论依据。通过模拟结果得出,CLAM钢作为靶室材料时,其屏蔽中子产生的瞬发光子剂量,在非孔道处是铝合金的1/2左右,40cm厚的混凝土屏蔽层对中子和光子起到了很好的屏蔽作用,均降低了一个数量级,另外在孔道处的中子和光子剂量,加了混凝土的情况反而比裸靶室时高10%左右,建议对靶室孔道外部考虑额外的防护。
This paper utilizes MCNP method together with the MCAM software(Monte-Carlo Automatic Modeling)to simulate the shielding performance of the laser fusion experimental facility's target chamber,in the meanwhile,provides theoretical foundation for the establishment of the shielding system,radiation protection of personnel as well as the selection of the target chamber from radiation protection perspective.The simulation results show that the instantaneous gamma dose in the non-channel area is reduced by 50% when CLAM steel(China Low Activity Martensitic Steel)was applied as the chamber material comparing to the aluminum alloy.In addition,the neutron and gamma dose are decreased one level by using the heavy concrete with a thickness of 40cm(aluminum alloy as the chamber target).It is worth mentioning that the neutron and gamma dose in the channel area is 10%larger than the bared target,so extra protection should be considered outside the hole.
This paper utilizes MCNP method together with the MCAM software(Monte-Carlo Automatic Modeling)to simulate the shielding performance of the laser fusion experimental facility's target chamber,in the meanwhile,provides theoretical foundation for the establishment of the shielding system,radiation protection of personnel as well as the selection of the target chamber from radiation protection perspective.The simulation results show that the instantaneous gamma dose in the non-channel area is reduced by 50% when CLAM steel(China Low Activity Martensitic Steel)was applied as the chamber material comparing to the aluminum alloy.In addition,the neutron and gamma dose are decreased one level by using the heavy concrete with a thickness of 40cm(aluminum alloy as the chamber target).It is worth mentioning that the neutron and gamma dose in the channel area is 10%larger than the bared target,so extra protection should be considered outside the hole.
引文
[1]林尊琪.激光核聚变的发展[J].中国激光,2010,37(9):2202-2207.(Lin Zunqi.Progress of laser fusion.Chinese Journal of Lasers,2010,37(9):2202-2207)
[2]丁永坤,江少恩,刘慎业,等.激光聚变研究中心聚变靶物理实验和诊断技术研究进展[J].强激光与粒子束,2013,25(12):3077-3081.(Ding Yongkun,Jiang Shaoen,Liu Shenye,et al.Recent progress on physical experiment and target diagnostics in Research Center of Laser Fusion.High Power Laser and Particle Beams,2013,25(12):3077-3081)
[3]江少恩,丁永坤,缪文勇,等.我国激光惯性约束聚变实验研究进展[J].中国科学G辑:物理学力学天文学,2009,39(11):1571-1583.(Jiang Shaoen,Ding Yongkun,Miao Wenyong,et al.Recent progress of intertial confinement fusion experiments in China.Science in China Series G:Physics Mechanics Astronomy,2009,39(11):1571-1583)
[4]郑万国,邓颖,周维,等.激光聚变研究中心激光技术研究进展[J].强激光与粒子束,2013,25(12):3082-3090.(Zheng Wanguo,Deng Ying,Zhou Wei,et al.Development of laser technology in Research Center of Laser Fusion.High Power Laser and Particle Beams,2013,25(12):3082-3090)
[5]曾勤,卢磊,李莹,等.蒙特卡罗粒子输运计算自动建模程序MCAM在ITER核分析建模中的应用[J].原子核物理评论,2006,23(2):138-141.(Zeng Qin,Lu Lei,Li Ying,et al.Application of automatic modeling code for Monte Carlo particle transport for ITER nuclear analysis.Nuclear Physics Review,2006,23(2):138-141)
[6]王国忠,党同强,熊键,等.MCAM 4.8在ITER建筑大厅中子学建模中的应用[J].核科学与工程,2011,31(4):351-355.(Wang Guozhong,Dang Tongqiang,Xiong Jian,et al.Application of MCAM 4.8in creationg neutronics model for ITER building.Nucleus Science and Engineering,2011,31(4):351-355)
[7]Wavrik R W,Cox J R,Fleming P J.National Ignition Facility target chamber[R].Lawrence Livermore National Laboratory,2015.
[8]黄群英,李春京,李艳芳,等.中国低活化马氏体钢CLAM研究进展[J].核科学与工程,2007,27(1):41-50.(Huang Qunying,Li Chunjing,Li Yanfang,et al.Progress in China low activation martensitic steel.Nuclear Science and Engineering,2007,27(1):41-50)
[9]Los Alamos National Laboratory.Monte Carlo N-particle transport code system[R].CC-701,MCNP4C2.Alamos,New Mexico.
[10]李刚,张宝印,邓力,等.蒙特卡罗粒子输运程序JMCT研制[J].强激光与粒子束,2013,25(1):158-162.(Li Gang,Zhang Baoyin,Deng Li,et al.Development of Monte Carlo particle transport code JMCT.High Power Laser and Particle Beams,2013,25(1):158-162)
[2]丁永坤,江少恩,刘慎业,等.激光聚变研究中心聚变靶物理实验和诊断技术研究进展[J].强激光与粒子束,2013,25(12):3077-3081.(Ding Yongkun,Jiang Shaoen,Liu Shenye,et al.Recent progress on physical experiment and target diagnostics in Research Center of Laser Fusion.High Power Laser and Particle Beams,2013,25(12):3077-3081)
[3]江少恩,丁永坤,缪文勇,等.我国激光惯性约束聚变实验研究进展[J].中国科学G辑:物理学力学天文学,2009,39(11):1571-1583.(Jiang Shaoen,Ding Yongkun,Miao Wenyong,et al.Recent progress of intertial confinement fusion experiments in China.Science in China Series G:Physics Mechanics Astronomy,2009,39(11):1571-1583)
[4]郑万国,邓颖,周维,等.激光聚变研究中心激光技术研究进展[J].强激光与粒子束,2013,25(12):3082-3090.(Zheng Wanguo,Deng Ying,Zhou Wei,et al.Development of laser technology in Research Center of Laser Fusion.High Power Laser and Particle Beams,2013,25(12):3082-3090)
[5]曾勤,卢磊,李莹,等.蒙特卡罗粒子输运计算自动建模程序MCAM在ITER核分析建模中的应用[J].原子核物理评论,2006,23(2):138-141.(Zeng Qin,Lu Lei,Li Ying,et al.Application of automatic modeling code for Monte Carlo particle transport for ITER nuclear analysis.Nuclear Physics Review,2006,23(2):138-141)
[6]王国忠,党同强,熊键,等.MCAM 4.8在ITER建筑大厅中子学建模中的应用[J].核科学与工程,2011,31(4):351-355.(Wang Guozhong,Dang Tongqiang,Xiong Jian,et al.Application of MCAM 4.8in creationg neutronics model for ITER building.Nucleus Science and Engineering,2011,31(4):351-355)
[7]Wavrik R W,Cox J R,Fleming P J.National Ignition Facility target chamber[R].Lawrence Livermore National Laboratory,2015.
[8]黄群英,李春京,李艳芳,等.中国低活化马氏体钢CLAM研究进展[J].核科学与工程,2007,27(1):41-50.(Huang Qunying,Li Chunjing,Li Yanfang,et al.Progress in China low activation martensitic steel.Nuclear Science and Engineering,2007,27(1):41-50)
[9]Los Alamos National Laboratory.Monte Carlo N-particle transport code system[R].CC-701,MCNP4C2.Alamos,New Mexico.
[10]李刚,张宝印,邓力,等.蒙特卡罗粒子输运程序JMCT研制[J].强激光与粒子束,2013,25(1):158-162.(Li Gang,Zhang Baoyin,Deng Li,et al.Development of Monte Carlo particle transport code JMCT.High Power Laser and Particle Beams,2013,25(1):158-162)