摘要
目的 了解雅安市室内外空气γ剂量率和氡浓度,以确保公众健康和辐射环境安全。方法 采用分层随机方式,在雅安市2区6县抽取5个乡镇,在各乡镇选取2个典型房屋,按相应测量规范开展室内外空气γ剂量率和同时段室内氡浓度检测,并对结果进行分析。结果 雅安市室外空气γ剂量率均值为(121.54±18.80)nGy/h,室内空气γ剂量率均值为(151.24±22.11)n Gy/h,室内外空气γ辐射所致人均年有效剂量当年为(0.891±0.125)mSv,高于全球(0.48 mSv,t=29.338,P≤0.001)和我国(0.54 mSv,t=25.055,P<0.001)水平,但未超过标准限值。室内空气氡浓度的均值为(21.12±14.36)Bq/m3,其引起的年均有效剂量为(0.712±0.484)mSv,低于全球(1.15 mSv,t=-8.098,P≤0.001)和我国(1.56 mSv,t=-15.675,P<0.001)平均水平。所在地区、房屋竣工年份和海拔高低是室外空气γ剂量率的影响因素,所在地区是室内空气γ剂量率和室内氡浓度的影响因素。室内外γ剂量率间呈正相关,室内外γ剂量率与室内氡浓度未发现相关性。结论 室内外空气γ剂量率和室内氡浓度均符合国标要求,天然放射性环境安全可靠,不会对民众产生不良影响,适合人类居住。室内外空气γ剂量率呈正相关,室内外空气γ剂量率与室内氡浓度未发现相关性。
Objective To understand the indoor and outdoor airγdose rate and radon concentration in Ya'an City,so as to ensure public health and radiation environment safety.Methods Stratified random method was used to select 5 townships from 6 counties in 2 districts of Ya'an City.Two typical houses in each township were selected to carry out the indoor and outdoor airγdose rate according to the standard,and the indoor radon concentration was detected at the same time,and the results were analyzed.Results The mean outdoor and indoorγ-dose rates were(121.54±18.80)nGy/h and(151.24±22.11)nGy/h,respectively.The average annual effective dose induced by them was(0.891±0.125)mSv,which was significantly higher than that of the world(0.48 mSv,t=29.338,P0.001)and our country(0.54 m Sv,t=25.055,P0.001),but it did not exceed the standard limit.The mean concentration of indoor air radon was(21.12±14.36)Bq/m3.The average annual effective dose of it was(0.712±0.484)mSv,which was significantly lower than that of the average level of the world(1.15 mSv,t=-8.098,P0.001)and China(1.56 mSv,t=-15.675,P0.001).The location,year of completion of the building and the altitude were the influence factors of outdoor airγdose rate,and the location was the influence factors of indoor airγdose rate and indoor radon concentration.There was a positive correlation between indoor and outdoorγdose rates,and no correlation was found between indoor and outdoorγdose rates and indoor radon concentration.Conclusions Indoor and outdoor airγdose rate and indoor radon concentration meet the requirements of the national standard,the natural radioactive environment is safe and reliable,that will not have adverse effects on people and suitable for human habitation.There is a positive correlation between indoor and outdoor airγdose rate,and no correlation between indoor and outdoor airγdose rate and indoor radon concentration.
作者
李美
冯德全
聂跃花
徐莹莹
钱中国
刘念
LI Mei;FENG Dequan;NIE Yuehua;XU Yingying;QIAN Zhongguo;LIU Nian(Ya'an Polytechnic College,Ya'an 625000,Sichuan Province,China;Ya'an Center for Disease Control and Prevention,Ya'an 625000,Sichuan Province,China;Ya'an People's Hospital,Ya'an 625000,Sichuan Province,China)
出处
《预防医学情报杂志》
CAS
2023年第9期1066-1071,共6页
Journal of Preventive Medicine Information
