CFETR中性束系统验证样机充氢运行辐射分析与初步模拟计算  

Radiation analysis and simulation of the CFETR neutral beam system prototype with hydrogen beam

作　　者：胡纯栋[1,2] 李梦婷 谢亚红 陈玉庆 HU Chundong;LI Mengting;XIE Yahong;CHEN Yuqing(Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院等离子体物理研究所,合肥230031 [2]中国科学技术大学,合肥230026

出　　处：《核技术》2018年第9期83-87,共5页Nuclear Techniques

基　　金：国家重点研发计划(No.2017YFE300101);国家自然科学基金(No.11705229;No.11675215;No.11675216)资助~~

摘　　要：中国聚变工程实验堆(China Fusion Engineering Test Reactor,CFETR)负离子源中性束系统验证样机正在积极设计筹建中,样机建成后在运行过程中会产生辐射。在设计阶段,仔细分析辐射源的类型、强度和空间分布,为辐射屏蔽设计提供输入数据,从而确保工作人员的辐射安全非常重要。本文通过对样机进行物理和几何建模,然后利用MCNP(Monte Carlo N Particle Transport Code)程序模拟计算200 ke V充氢运行的负离子源中性束系统验证样机各关键点的辐射剂量。研究结果为CFETR中性束系统验证样机辐射屏蔽设计提供参考。[Background] China fusion engineering test reactor （CFETR） neutral beam injector （NBI） prototype is being actively designed and built. The radiation will be generated during the operation of the prototype. In order to ensure the safety of staff, it is very important to analyze the radiation and types and design the radiation shielding at the design stage. [Purpose] To study the radiation dose of the CFETR neutral beam test facility with hydrogen beam energy of 200 keV. [Methods] According to the established model of physics parameter and geometry, the radiation dose of the key points of the negative ion based neutral beam injector system with the beam energy of 200 keV was simulated by Monte Carlo N particle transport code （MCNP）. [Results] The vacuum wall has some self-shielding effects, but it does not decrease the dose to the dose limits setting by the International Atomic Energy Agency （IAEA）. [Conclusion] This result can provide important reference for the design of radiation shielding for CFETR neutral beam system.

关 键 词：CFETR中性束系统 MCNP 辐射剂量 

分 类 号：TL69[核科学技术—核技术及应用]