摘要近年来我国空气质量急剧下降，雾霾日益严重，空气中氡活度水平也成为值得关注的问题之一。对空气氡浓度水平进行调查，对公众健康有着重要意义。本课题利用美国RAD7 便携式测氡仪，将南京市玄武区南京理工大学校区作为监测对象，对其室外环境空气中氡活度水平进行实时测量。讨论室外空气中氡活度水平日变化规律以及不同天气情况下氡浓度水平变化情况，进而评估人体所受到的辐照剂量。监测结果表明：氡浓度的日变化取决于大气稳定度的变化，大气稳定度越高，氡浓度越高；不同天气状况下氡的活度水平，晴天时最高，阴天次之，雨天最低；南京市玄武区室外空气中氡活度水平大约为15.30Bq/m³；生活在监测区域附近的人，所受年有效辐照剂量的估算结果为2.683mSv/a，介于公众年有效剂量安全范围(<5mSv/a)内，属于正常值。但人们仍要在日常生活中注意室内外通风，提高对氡危害的防范意识。26699
关键词  氡  室外空气  RAD7测氡仪  南京市  辐照剂量
毕业设计说明书（毕业论文）外文摘要
Title  Analysis of activity level of radon in air
Abstract
   In recent years, a sharp decline in the quality of our air, haze worsening the level of radon in the air has become one of the issues of concern. Air radon concentration levels the investigation, is of great significance to public health. The issue of portable uses US RAD7 radon monitor,and regards the Xuanwu District of Nanjing University campus as the object, real-time measures its outdoor radon levels in ambient air.Discusse The variation of the radon activity level in outdoor air in a day and the radon concentration level in different weather conditions . Further more, in order to evaluate the exposure dose of human body. Monitoring results show that: the diurnal variation of radon concentration depends on the changes in atmospheric stability, atmospheric stability, the higher the radon concentration; activity level of radon under different weather conditions, when the highest sunny, cloudy, followed by rainy lowest; Xuanwu District, Nanjing outdoor air radon level is about 15.30Bq / m³; people living near the monitoring area, suffered annual effective radiation dose estimates for the 2.683mSv / a, ranging from public safety annual effective dose range (<5mSv / a) within, below normal. But people still pay attention to indoor ventilation in daily life and improve awareness of radon hazards.
Keywords  Radon  outdoor air  RAD7 radon monitor  Nanjing  Radiation dose
目录
1 绪论    1
1.1 本课题的目的及意义    1
1.2 国内外研究现状分析    2
2 南京市及南京市玄武区概况    5
2.1南京市概况    5
2.2南京市玄武区概况    6
3 室外空气中氡活度的测量    7
3.1 测量仪器简介    7
3.2 实验方法及步骤    8
3.3 测量结果与讨论    11
4 人体所受到的氡辐照剂量评价    16
4.1 氡暴露的剂量估算法    16
4.2 人体所受辐照剂量估算    17
结论    19
致 谢    21
参考文献    22
1 绪论
1.1 本课题的目的及意义
近年来，随着雾霾天气情况频繁出现于各大城市，如北京、南京、武汉等地，空气质量急剧下降，公众健康面临着严重威胁，人们对赖以生存的环境空气质量情况愈发的关注。因此有关于对人体健康存在潜在巨大威胁的环境中主要致癌物质之一的氡的活度水平的问题再次引发了全球范围内的热议，研究人员对氡活度水平的研究调查也开始由室内环境转向室外，诸如：对上海地区空气中氡活度水平调查[1]，北京市室外空气氡浓度的调查，以及对湛江市住房室内外空气中氡浓度测定[2]等一系列对各大城市室外空气中的氡浓度均进行了调查研究，表明了对室外空气氡活度水平的探讨是有必要的，是具有实际意义的。 空气中氡活度水平分析+文献综述:http://www.youerw.com/huaxue/lunwen_20956.html