EHL-2轫致辐射的辐射剂量计算  

Dose Calculation of EHL-2 Bremsstrahlung Radiation

作　　者：白岩 齐冀 董占猛 赵岳 王嵎民 Bai Yan;Qi Ji;Dong Zhanmeng;Zhao Yue;Wang Yumin(Hebei Key Laboratory of Compact Fusion,Langfang 065001,China;ENN Science and Technology Development Co.,Ltd.,Langfang 065001,China)

机构地区：[1]河北省紧凑型聚变重点实验室,廊坊065001 [2]新奥科技发展有限公司,廊坊065001

出　　处：《核安全》2025年第2期45-51,共7页Nuclear Safety

摘　　要：在EXL-50U装置的基础上,新奥自主设计了新一代球形环等离子体实验装置EHL-2,其加热功率、等离子体电流、约束时间等参数均较上代装置有所升级,需要对EHL-2装置表面的辐射剂量进行评估。本文基于EHL-2的设计参数,对装置结构主体进行三维建模,采用蒙特卡罗程序分析了轫致辐射对装置表面辐射剂量的影响,并计算了职业人员和一般公众的辐射剂量。研究结果表明,平均能量10 keV的轫致辐射对装置表面的辐射分布影响极小,逃逸电子对于装置表面的辐射剂量起主要作用,当发生等离子体破裂等异常放电时,距离装置表面外1 m处的人员受到的辐射剂量为4.81 mSv。经计算,EHL-2的轫致辐射对于职业人员和一般公众的年累计辐射剂量均低于国标要求。Based on the EXL-50U device,ENN independently designed a new generation of spherical tokamak plasma experimental device called EHL-2.Compared to its predecessor,the EHL-2 features upgraded parameters such as heating power,plasma current,and confinement time.It is necessary to evaluate the radiation dose on the surface of the EHL-2 device.This paper utilizes the design parameters of EHL-2 and constructs a 3D model of the main structure of the device.The Monte Carlo method is employed to analyze the impact of bremsstrahlung radiation on the surface radiation dose of the device,and the radiation doses for occupational workers and the general public are calculated.The research results indicate that bremsstrahlung radiation with an average energy of 10 keV has a minimal effect on the radiation distribution on the device surface,while runaway electrons play a dominant role in the radiation dose on the device surface.During abnormal discharges such as plasma disruptions,the radiation dose received by personnel at 1 meter away from the device surface is 4.81 mSv.Calculations show that the annual cumulative radiation dose from bremsstrahlung radiation of EHL-2 for both occupational workers and the general public is below the national standard requirements.

关 键 词：和龙-2 辐射剂量计算 蒙特卡罗 轫致辐射 

分 类 号：TL72[核科学技术—辐射防护及环境保护]