苏州市室内氡浓度水平及其影响因素研究  

Indoor radon levels and influencing factors in houses of Suzhou

作　　者：涂彧[1] 卢志娟 俞荣生[3] 许哲[3] 

机构地区：[1]苏州大学放射医学与公共卫生学院,江苏苏州215123 [2]无锡亿仁肿瘤医院,江苏无锡214174 [3]苏州市疾病预防控制中心,江苏苏州215004

出　　处：《江苏预防医学》2010年第5期8-11,共4页Jiangsu Journal of Preventive Medicine

基　　金：放射医学与防护重点实验室开放课题(SS16002)

摘　　要：目的:了解苏州市室内222Rn浓度及其影响因素。方法:使用固体径迹探测器,调查苏州市8个行政区域160户居民室内222Rn浓度,调查时间为1年,每3个月为一周期,即春、夏、秋、冬四季。探测器回收后,在6.25 mol/L的NaOH溶液中,恒温90℃蚀刻5 h,在显微镜下读数。结果:年平均222Rn浓度为29.9±21.0 Bq.m-3;不同季节、不同通风时间、不同建筑结构及建筑年代的室内222Rn浓度存在显著差异(P<0.05);结论:苏州市居民室内年平均222Rn浓度低于国家标准《电离辐射防护与辐射源安全基本标准(GB 18871—2002)》;季节、通风时间、建筑材料是室内222Rn浓度的主要影响因素。Objective： To determine indoor radon（222 Rn）levels and influencing factors in houses of Suzhou. Methods： Measurements of indoor radon concentrations were performed in eight regions in Suzhou area for one year, using nuclear track detectors. Every 3 months for a period, corresponding to spring, summer, autumn and winter seasons in Suzhou. Total 160 rooms have been measured in each period. After exposure, the radon monitors were returned to the laboratory and the pieces of CR-39 were taken out of the cuptype monitors and etched in NaOH 6.25N at 90℃ for a period of 5h with a constant-temperature water bath, then the detectors were counted under an optical microscope. Results： The arithmetic means （A. M. ±S. D. ） of annual radon concentration is （29.9 ±21.0） Bq · m^-3 , The differences of mean radon concentrations were statistically significant in different seasons, ventilation, building structures and age of the houses, （P〈0. 05. Conclusion.. The average annual indoor radon concentration in houses of Suzhou is far blow the action level recommended by GB 18871-2002 ＂Basic standards for protection against ionizing radiation and for the safety of radiation sourees＂; In short, different seasons, ventilation and materials of building are the main＂ influencing factors of indoor radon.

关 键 词：室内氡浓度 季节 通风时间 建筑材料 

分 类 号：X591[环境科学与工程—环境工程]