不同方法监测环境γ辐射剂量率的结果比较与分析

Comparison and analysis of environmental γ-radiation levels by using different monitoring methods

目的探讨使用不同方法测定环境地表γ辐射剂量率的监测结果。方法选取5个环境监测点位,2个监督性监测点位,对其2010-2014五年间γ辐射剂量率自动连续监测γ辐射剂量率瞬时监测与γ辐射累积剂量监测结果三者进行了比对分析。结果分析表明对同一点位γ辐射剂量率的监测结果显示,自动监测>累积监测>瞬时监测。对同一点位和同一监测方法,五年标准差的范围是0.62~6.96 nSv/h,而同一点位不同监测方法,标准差范围是4.95~28.11 nSv/h。结论本次比对工作在一定程度上证明了环境地表γ辐射剂量率测定三种方法的科学性与可比性,保证了监测数据的质量,在辐射环境监测点位优化层面也有重要意义。

Objective To discuss the results of terrestrial γ radiation using different monitoring methods. Methods Five environmental monitoring points and two supervisory monitoring points were selected,and results of γ dose rates from the automatic continuous monitoring(ACM）,instantaneous monitoring(IM） and cumulative monitoring(CM） during 2010-2014 were compared. Results The results at same point showed that γ dose rates monitored by the ACM were the largest,those of the CM were the second,and those of the IM were the smallest. For the same point in the five years,the standard deviations were 0. 62 6. 96 nSv/h and 4. 95 28. 11 nSv/h by using the same and different monitoring methods,respectively. Conclusion To a certain extent it has been proved that the terrestrial γ radiation monitored by the three methods is scientific and comparable. It is able to guarantee the quality of monitoring data,and it is of great significance to optimize monitoring points in the radiation environment.