【摘要】 目的了解广州某地下人防工事空气氡浓度水平及其变化规律。方法采用RAD7型测氡仪对指挥中心、通道等场所进行瞬时氡浓度测量与分析,并粗略估算氡及其子体所致工作人员年有效剂量。结果指挥中心、无线通讯室、中央主通道和仓库区通道这4个有人员停留的主要工作场所的日间氡浓度均值分别为106. 7、98. 4、129. 0、111. 1 Bq/m3,总体平均为111. 0 Bq/m3。222Rn子体所致工作人员的年有效剂量当量为0. 400 m Sv/a。结论不同场所的氡浓度不尽相同,且其受通风、排水等人为活动的影响呈不同的变化规律。更多还原

【Abstract】 Objective To acquaint the level of222 Rn concentrations and its behavior in an underground air-raid shelters in Guangzhou. Methods222 Rn concentrations were monitored by the RAD7,and the annual effective dose from222 Rn and its progeny was roughly estimated. Results The daytime averaged222 Rn concentration were 106. 7 Bq/m3,98. 4 Bq/m3,129. 0 Bq/m3 and 111. 1 Bq/m3 in the command center,wireless communication room,the central main channel and warehouse area channel,respectively,with an average of 111. 0 Bq/m3. The personnel’s annual effective dose from222 Rn and its progeny was estimated to be 0. 400 m Sv/a. Conclusion222 Rn concentration and its behavior differs from workplace,ventilation,drainage system or other human activities.更多还原