论文部分内容阅读
目的为了更好地进行剂量与效应关系的分析，将高本底辐射地区（ＨＢＲＡ）的人员按村平均的环境γ外照射水平及各自的居留因子估算的村平均有效剂量分成“高”、“中”、“低”三个剂量组和相邻的正常本底地区（ＣＡ）的一个对照组。方法在进行辐射剂量与效应关系的研究时，采用环境γ外照射辐射水平（卧室、室内、外和田野）的测量和个人累积剂量（ＴＬＤ）的两种测量方法给出ＨＢＲＡ和ＣＡ各组人员平均有效剂量。结果这两种方法的测量结果：ＨＢＲＡ分别是２１１８６×１０－５Ｓｖ·ａ－１和２０６７５×１０－５Ｓｖ·ａ－１；ＣＡ分别是６８６０×１０－５Ｓｖ·ａ－１和６７１１×１０－５Ｓｖ·ａ－１。两种不同测量方法所估算的村平均有效剂量有很好的相关性，它们的直线回归方程为Ｙ＝０．９３３７Ｘ＋６．０４４４，相关系数ｒ＝０．９９４９。结论环境γ外照射辐射水平测量方法的总的不确定度为１５％。作者分析了引起人员误分组的原因，并认为人员的误分组的可能性不会超过１％，它不会影响分组作用的有效性。
OBJECTIVE In order to better analyze the relationship between dose and effect, the village average effective dose of HBRA staffs estimated according to the village’s average ambient γ exposure and their respective residence factors is divided into “high” and “ Middle ”,“ low ”three dose groups and a control group adjacent normal background area (CA). Methods In the study of the relationship between dose and effect of radiation, two methods of measurement of ambient γ radiation level (bedroom, indoor, outside field and field) and personal cumulative dose (TLD) were used to calculate the mean Effective dose. Results The measurement results of the two methods: HBRA were 211.86 × 10-5Sv · a-1 and 20675 × 10-5Sv · a-1, respectively, and CA was 6860 × 10-5Sv · a-1 And 6711 × 10-5Sv · a-1. The average effective dose of the two villages estimated by two different measurement methods has a good correlation. Their linear regression equation is Y = 0.9337X + 6.0444, correlation coefficient r = 0.9949. Conclusion The total uncertainty of the measurement method of ambient γ radiation level is 15%. The author analyzes the causes of misclassification of persons and considers that the probability of misclassification of persons does not exceed 1% and does not affect the validity of subgroups.