摘要
中国环流三号(HL-3)装置下一步将进行氘氘(DD)/氘氚(DT)聚变实验,聚变中子对人体的电离辐射损伤不可忽视,辐射防护安全是开展聚变实验研究的保障。利用蒙特卡罗方法,通过三维粒子输运程序cosRMC[1]计算了在HL-3装置芯部中DD聚变中子对主机大厅周围1000m半径范围内的天空反散射问题。将天空反散射和直接贯穿两种情况下中子辐照对人体的有效吸收剂量进行评估,确定现在主机大厅的辐射防护在安全范围以内。针对DT聚变实验,估算在10MJ的聚变能量下,DT聚变中子的天空反散射情况,在现有的屏蔽措施基础上提出加强屏蔽的合理建议,供未来HL-3装置实验的环境评估和防护设计使用。
The next plan for HL-3 tokamak will be DD/DT fusion experiments,the ionizing radiation damage of fusion neutrons to the human body can not be ignored,and the radiation protection is the guarantee for fusion experimental research.Using Monte Carlo method,the skyshine problem of DD fusion neutrons in the core of HL-3 within a radius of 1000m around the main hall is calculated by the three-dimensional particle transport code cosRMC.The effective absorbed dose of the human body resulting by neutron irradiation is evaluated under skyshine and direct penetration circumstance,making sure that radiation protection in the main hall is now within a safe range.For DT fusion experiment in HL-3,the skyshine circumstance of DT fusion neutrons at an energy of 10MJ is estimated,and reasonable suggestions to strengthen the shielding are proposed on the basis of the existing shielding measures,which could be used for the environmental assessment and protection design of future experiments in HL-3.
作者
张一恒
赵自强
栗再新
才来中
ZHANG Yi-heng;ZHAO Zi-qiang;LI Zai-xin;CAI Lai-zhong(Southwestern Institute of Physics,Chengdu 610041)
出处
《核聚变与等离子体物理》
北大核心
2025年第1期7-12,共6页
Nuclear Fusion and Plasma Physics
