摘要
应用蒙特卡洛程序FLUKA对230 MeV质子加速器停机后加速器结构部件、冷却水、混凝土屏蔽墙、空气、土壤及地下水所产生的感生放射性核素种类和活度进行模拟计算。结果表明:混凝土屏蔽墙、土壤以及地下水的核素活化饱和浓度满足豁免要求;加速器结构部件的感生放射性总活度在停机后2 h内降低到原来50%,12 h后衰减速率趋于平缓;冷却水中活化核素活度浓度低于标准限值。针对感生放射性对放射性工作人员及公众的影响,提出了相应辐射防护措施建议。
The Monte Carlo program FLUKA was used to simulate and calculate the types and activities of induced radionuclides produced by the structural components of the accelerator,cooling water,concrete shielding walls,air,soil and groundwater after the 230 MeV proton accelerator was shut down.The results show that the radioactive nuclides saturation concentration of the concrete shielding wall,soil and groundwater meets the exemption requirements;the total induced radioactivity of the accelerator structural components is reduced to 50%within 2 hours after shutdown,and the attenuation rate tends to be flat after 12 hours;cooling The activity concentration of activated nuclides in water is lower than the standard limit.Aiming at the impact of induced radioactivity on radioactive workers and the public,corresponding radiation protection measures were proposed.
作者
冀东
侯铁钢
宋旺旺
何占飞
王宏良
JI Dong;HOU Tie-gang;SONG Wang-wang;HE Zhan-fei;WANG Hong-liang(The Fourth Research and Design Engineering Corporation of CNNC,Shijiazhuang 050021,China;China Institute of Atomic Energy,Beijing 102413,China)
出处
《核电子学与探测技术》
CAS
北大核心
2021年第2期344-349,共6页
Nuclear Electronics & Detection Technology
关键词
质子加速器
感生放射性
辐射防护
Proton Accelerator
Induced Radioactivity
Radiation Protection
