四种测氡仪器测量效果的比较研究

Comparison of measurement effect for four commonly used radon measuring instrument

目的对我国常用的四种现场氡测量仪器RAD7、RTM2100、RTM1688和PQ2000的性能和测量结果进行比较。方法选择一个普通房间和高氡地下室进行了氡气含量的实地测量和比较。结果 PQ2000稳定性和可靠性最好,两个浓度的测量值与氡室参考值的R均为2%;RTM2100实测值波动较大,低水平测量时应注意延长测量时间;RAD7型连续测氡仪需要进行干燥处理,否则结果会偏低。结论四种连续测氡仪在不同环境的测量结果的可靠性均在有关标准的允许范围之内。

Objective To compare the performance and measurement results of four types of radon measuring instruments RAD7,RTM2100,1688 and PQ2000,which are commonly used for field radon measurement.Methods A common room and a basement with high radon were selected for field measurements of the radon gas and comparison.Results The stability and reliability of the results for PQ2000 was the best,and the relative bias between measured values and reference value in the radon chamber were 2% for both two different radon concentrations.The fluctuation of actual measurements of RTM2100 was much larger,and the measurement time should be extended under low level measurement.RAD7 continuous radon monitor should be dried during measurement,otherwise the measurement results would be lower.Conclusion The reliability of measurement results for 4 continuous radon monitors were all within acceptable range of related standards in different environments.