福建省部分地区环境放射性水平调查研究

目的 了解我国福建省东南沿海福州、宁德、漳州等6个地区的现行环境放射性水平。方法 通过对福州、宁德、漳州等6个地区的地表土壤(0~5 cm)、空气、水样品的采集,制备和HPGeγ能谱分析,以及现场γ空气吸收剂量率的测量,给出这些地区环境中的放射性核素含量和水平。结果 表层土壤中²³⁸U、²²⁶Ra、²³²Th、⁴⁰K的活度浓度均值为58.0Bq·kg^-1、52.6Bq·kg^-1、80.9Bq·kg^-1、914Bq·kg^-1,人工放射性核素¹³⁷Cs的活度浓度均值为1.72Bq·kg^-1;空气γ吸收剂量率的平均值为12.9×10^-8Gy/h,与既往福建省调查结果的偏差为11.1%。结论 这些地区现行环境放射性水平与既往监测结果基本一致。

The Investigation on Environmental Radioactivity of Coastal Regions in Fujian Province

Objective To investigate the current environmental radioactivity level at 6 coastal cities, such as Fuzhou, Ningde, Zhangzhou etc.in Fujian Province, China.Methods The surface soil (0~5 cm), air particulates and water samples were collected at the sites and analyzed by HPGe gamma spectrometry.Gamma dose rates were also measured when we collected samples were collected.Then the environmental radioactivity level of the sites was abtained.Results The average radioactivity concentrations of ²³⁸U, ²²⁶Ra, ²³²Th and ⁴⁰K are 58.0Bq·kg^-1, 52.6Bq·kg^-1, 80.9Bq·kg^-1 and 914Bq·kg^-1;the concentration of ¹³⁷Cs is 1.72 Bq·kg^-1 in the surface soil of these regions.The averaged gamma dose rate is 12.9×10^-8Gy/h, about 11.1% higher than the previous investigated results.Conclusion The current radioactivity level of these regions is almost consistent with the previous investigated results.