2013年-2014年间深圳市沉降灰中总α总β放射性水平

Analysis of the levels of gross α and gross β radioactivity in atmospheric fallout during 2013-2014 in Shenzhen City

目的了解深圳市2013年-2014年沉降灰中总α总β放射性含量,并与以往结果开展比较。方法依据《环境空气质量监测规范》(试行)制定采样布点方法,依据《生活饮用水标准检验方法放射性指标》中的饱和厚度相对测量法对沉降灰样总α总β放射性进行测量分析。结果全市沉降灰中总α活度在0. 078～7. 02(Bq/m^2·月)范围,总β活度在2. 67～10. 69(Bq/m^2·月)范围内。结论此次测量结果与深圳市疾控中心(1993-2005年)和广东省辐射监测中心(2007-2010年)的监测结果相当,仍在正常范围内涨落。

Objective To acquaint the levels of grossαand gross β radioactivity in the fallouts in Shenzhen City,and to compare with their previous values. Methods Fallouts samples were collected according to the'Environmental air quality monitoring specifications',and the radioactivity of gross αand gross β in the fallouts was analyzed by taking 'Standard test method for drinking water-Radioactivity index'as reference. Results The averaged gross α ranged from 0. 078 Bq/( m^2·month) to7. 02 Bq/( m^2·month),and the value of gross βwas in a rage of 2. 67-10. 69 Bq/( m^2·month). Conclusion The results were in the same levels as those reported by the CDC of Shenzhen( 1993-2005) and the Guangdong Environmental Radiation Monitoring Center( 2007-2010).