建材析出氡浓度持续监测研究及其应用

Continuous monitoring of radon concentration released from building materials and its application

建筑材料析出的氡扩散至房屋内部导致室内氡浓度增加,对居住者产生健康威胁。提出了一种建材析出氡浓度持续监测方法,将自制具有不同放射性含量的建材实验样品块和氡浓度持续监测系统放置于密闭恒温容器内进行长时间监测,结果表明在2~9 h密封时间内建材析出氡浓度与密封时间的线性相关系数为0.99以上,连续密封72 h时氡浓度的析出量仍在增加,未出现饱和趋势。将氡浓度持续监测系统应用于室内氡浓度监测,当浓度超过报警阈值后自动开启通风系统进行空气置换,可实现快速排氡,有效改善室内空气质量,避免居住者长期暴露在高氡浓度环境中。

The diffusion of radon from building materials of the house results in the increase of indoor radon concentration,and posing a health threat to residents.This paper presented a method for continuous monitoring of radon concentration released from building materials.Self-made experimental sample blocks of building material with different radioactive contents and a radon concentration continuous monitoring system were placed in a sealed constant-temperature container for long-term monitoring.The results show that there is a linear correlation coefficient above 0.99 between the radon concentration released from building materials and the sealing time within the range of 2~9 hours.After continuous sealing for 72 hours,the radon concentration continues to increase without reaching saturation.By applying the continuous monitoring system for indoor radon concentration,the ventilation system is automatically activated for air replacement when the concentration exceeds the alarm threshold.This allows for rapid removal of radon,effectively improving indoor air quality,and avoiding long-term exposure of residents to high radon levels.