摘要
了解银川市内地表γ辐射空气吸收剂量率水平现状,掌握地表γ辐射分布规律,评价居民外照射受照水平,逐步建立完善全市环境辐射本底数据库,为保障公众身体健康安全和城市建设发展提供技术支撑,为政府决策提供依据。采用网格法均匀布设测点开展银川地表γ辐射空气吸收剂量率测量,总结银川不同行政区划、不同环境条件、不同土壤及材料的γ辐射剂量率水平,估算居民所受照射的有效剂量。调查结果表明:银川地表γ辐射空气吸收剂量率(扣除宇宙射线响应后)平均48.67 nGy·h^(-1),与宁夏全区水平接近,低于全国水平。所造成的公众年照射有效剂量为0.30 mSv,低于中国陆地辐射人均年剂量(0.46 mSv),亦低于宁夏全区室外γ辐射剂量(0.55mSv)。
In order to understand the current situation of the air absorption dose rate level from terrestrialγ-radiation in Yinchuan,master the distribution pattern of surfaceγ-radiation,evaluate the external exposure level of residents,gradually establish and improve the environmental radiation background database of the whole city of Yinchuan,Ningxia,and provide technical support for ensuring the health and safety of the public and the development of urban construction,and provide a basis for government decision-making,Evenly measuring grid method was used to cover the measurement area of the air absorption dose rate of surfaceγ-radiation in Yinchuan city.The dose rate levels of different administrative regions,different environmental conditions,different soils and materials in Yinchuan city were collected and summarized,the effective dose received by residents was estimated.The survey results indicate that the average terrestrial gamma radiation absorbed dose rate in Yinchuan(after deducting cosmic ray contributions)is 48.67 nGy·h^(-1),primarily attributed to 40K.This value closely aligns with the regional average in Ningxia Hui Autonomous Region but is significantly lower than the national average.The resultant annual effective dose to the public is calculated as 0.30 mSv,which is lower than both the per capita annual dose from terrestrial radiation in China(0.46 mSv)and the outdoor gamma radiation dose in Ningxia(0.55 mSv).
作者
王赕
马杰
窦志娟
李佐有
李园
WANG Dan;MA Jie;DOU Zhijuan;LI Zuoyou;LI Yuan(Ningxia Nuclear Industry Geological Exploration Institute,Yinchuan 750001,China)
出处
《世界核地质科学》
2025年第3期668-675,共8页
World Nuclear Geoscience
基金
宁夏自然科学基金项目(编号:2021AAC03475)资助。
关键词
银川市
γ辐射空气吸收剂量率水平
年有效剂量
Yinchuan
level of air absorption dose rate ofγ-radiation
annual effective dose
