低放稀土废渣外照射剂量的估算与测定
毕业论文关键字：高纯锗探测仪 低放稀土渣 外照射剂量 放射性核素
Low level of acid-soluble residue treatment and disposal
of radioactive rare earth Study
School of Environmental and Biological Engineering, Radiation Protection and Environmental Engineering Major
Instructor：Lu, Jiaqi
Abstract: China's rare earth reserves the appropriate size of its rich mining and processing industry is also relatively large. Rare radioactive substances are not only likely to cause radioactive contamination of air , surface water and groundwater environment and staff have long been engaged in this area will have some impact . Meanwhile, China's rare earth waste management is still at the initial stage , a lot of problems to be studied. So estimation and measurement of external dose of rare earth residue is particularly important . External radiation dose and exposure time law model in this paper , mainly through the study of acid-soluble rare earth and rare earths slag and slag and slag rare . By two months of the experiment was concluded rare external dose different models generated slag greatly different, mainly related to the contact surface model ; contact distance and the irradiation time are related , wherein the irradiation condition of the same model from the same The longer the time the greater the dose , the same as the same irradiation dose irradiation time, the smaller the greater the distance . Factors which influence exposure time as the main factor . So out of consideration for the health of the staff , under different circumstances should be based on the actual situation of the working hours of staff should make reasonable arrangements .
Key words: high-purity germanium detector Low-level radioactive rare earth residue External radiation dose Radionuclide
目 录
1 绪论 5
1．1 我国稀土工业概况 5
1.1.1什么是稀土元素 5
1.1.2我国稀土矿的分布及其发展类型 6
1.1.3我国稀土工业的发展及其状况 8
2 实验仪器及实验内容 8
2.1 实验仪器及其说明 9
2.1.1 高纯锗γ能谱仪 9
2.1.2热释光剂量读出器 11
2.2 实验内容简述 13
2.2.1 实验可行性分析 13
2.2.2 实验内容 13
2.2.3 实验流程图 13
2.3 外射剂量估算公式 14
3 实验步骤与结果分析 15
3.1实验步骤 16
3.2实验数据分析 16