海阳市空气中14C放射性水平研究  

Study on radioactivity level of carbon-14 in air of Haiyang City

作　　者：赵新景 刘文娜 徐凯彦 徐茜 丁洪深 ZHAO Xinjing;LIU Wenna;XU Kaiyan;XU Qian;DING Hongshen(Shandong Nuclear and Radiation Safety Monitoring Center,Jinan 250117 China)

机构地区：[1]山东省核与辐射安全监测中心,山东济南250117

出　　处：《中国辐射卫生》2019年第3期296-298,共3页Chinese Journal of Radiological Health

摘　　要：目的通过对海阳市环境空气中^14C布点采样监测,分析海阳核电厂运行前该地区辐射环境空气中^14 C放射性水平,为环境空气中^14C放射性水平的变化积累历史数据。方法在海阳市地域设置4个采样监测点位、在烟台市区设置1个对照点位,2017年8月-2018年7月逐月对空气中^14C进行样品采集,将空气中^14C生成碳酸钙沉淀后烘干至恒重,然后用液体闪烁计数器测试^14C释放出的β射线产生的计数,进而计算空气中^14C放射性活度浓度。结果海阳市空气中^14C监测结果为0.17~0.31 Bq/g·碳,平均值为0.23 Bq/g·碳。结论海阳市空气中^14 C放射性活度浓度总体处于环境正常水平。Objective Through sampling and monitoring of carbon-14 in the ambient air of Haiyang City,the radioactivity level of carbon-14 in the ambient air of this area before operation of Haiyang Nuclear Power Plant was analyzed,so as to accumulate the historical data for the change of carbon-14 radioactivity level in the ambient air.Methods From August 2017 to July 2018,carbon-14 in the air was sampled monthly at four monitoring points in Haiyang,and a control point in Yantai urban district.Carbon-14 in the air was precipitated into calcium carbonate and dried to a constant weight.The counts of beta-rays emitted by carbon-14 was measured by liquid scintillation counter,then the concentration of carbon-14 radioactivity in the air can be calculate.Results The monitoring results of carbon-14 in the air of Haiyang City ranged from 0.17 to 0.31 Bq/g·C,with an average of 0.23 Bq/g·C.Conclusion The radioactivity concentration of carbon-14 in air of Haiyang City is generally in the normal level of environment.

关 键 词：环境空气 ^14C 放射性 

分 类 号：X591[环境科学与工程—环境工程]