广东阳江高本底地区γ辐射水平调查  

A survey of terrestrial γ radiation level in high background radiation area of Yangjiang,Guangdong

作　　者：李小亮[1] 赵锡鹏[1] 赵玉倩 朱卫国[1] 黄志标[2] 陈池宋 雷淑洁[1] 孙全富[1] LI Xiaoliang;ZHAO Xipeng;ZHAO Yuqian;ZHU Weiguo;HUANG Zhibiao;CHEN Chisong;LEI Shujie;SUN Quanfu(Key laboratory of Radiological Protection and Nuclear Emergency,China CDC,National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention,Beijing 100088 China;Yangjiang Center for Disease Control and Prevention;Enping Center for Disease Control and Prevention)

机构地区：[1]中国疾病预防控制中心辐射防护与核安全医学所辐射防护与核应急中国疾病预防控制中心重点实验室,北京100088 [2]阳江市疾病预防控制中心 [3]恩平市疾病预防控制中心

出　　处：《中国辐射卫生》2018年第5期427-429,共3页Chinese Journal of Radiological Health

摘　　要：目的调查阳江高本底地区和对照地区地表γ辐射水平。方法采用多阶段抽样的方法,选择阳江高本底地区112所房屋,恩平对照地区147所房屋,使用便携式X、γ剂量率仪(FH40G+FHZ672E-10)测量屋内和门口的γ辐射水平,同时测量选定管区的室外γ辐射水平。结果高本底地区室内外γ辐射水平分别为(0. 36±0. 06)μSv/h和(0. 16±0. 06)μSv/h,对照地区分别为(0. 13±0. 05)μSv/h和(0. 09±0. 03)μSv/h,高本底地区室内外γ辐射水平约为对照地区的3倍和2倍,差异均具有统计学意义。高本底地区新房屋室内γ辐射水平为(0. 34±0. 05)μSv/h,低于老房屋室内γ辐射水平(0. 38±0. 05)μSv/h;对照地区的新房屋室内γ辐射水平为(0. 18±0. 02)μSv/h,高于老房屋室内γ辐射水平(0. 09±0. 03)μSv/h,两者的差异均有统计学意义。结论阳江高本底地区γ辐射水平显著高于对照地区,但两地区差异较上世纪有所减小。Objective To obtain the levels of terrestrial γ radiation in the high background radiation area( HBRA) of Yangjiang and its control area of Enping. Methods A total of 112 houses in the HBAR and 147 houses in Enping were selected through multi-stage sampling. The in-room and at-gate γ radiation level swere measured by a survey meter( FH40 G +FHZ672 E-10). Meanwhile,the levels of outdoor γ radiation of selected villages were also measured. Results The indoor and outdoor γ radiation levels in the HBRA were( 0. 36 ± 0. 06) μSv/h and( 0. 16 ± 0. 06) μSv/h,while the levels in Enping were( 0. 13 ± 0. 05) μSv/h and( 0. 09 ± 0. 03) μSv/h,respectively. The levels of indoor and outdoor γ radiation in the HBRA are about 3 and 2 times of those in Enping,respectively,and the differences were statistically significant. The levels of indoor γ radiation in the HBRA were( 0. 34 ± 0. 05) μSv/h and( 0. 38 ± 0. 05) μSv/h for the new houses and the old houses,respectively. While the values in the control area were( 0. 18 ± 0. 02) μSv/h and( 0. 09 ± 0. 03) μSv/h,respectively.The differences between the new and old houses were both significant in the two areas. Conclusion The level of γ radiation in the HBRA of Yangjiang is much higher than that of control area,but the difference between the two areas is decreasing.

关 键 词：高本底地区 房屋 外照射 

分 类 号：X591[环境科学与工程—环境工程]