五莲县中东部地区放射性环境地质调查
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摘要
通过对五莲县中东部地区的天然放射性环境地质调查,分析了该区环境的放射性特征、分布规律及其影响因素。结果表明:调查区内天然放射性本底中,γ辐射剂量率背景值为80.0n Gy/h,公众照射所致居民平均年有效剂量为0.46m Sv。天然辐射高本底区域主要表现为岩石(土壤)γ剂量率和232Th核素含量异常特征,主要岩性为二长花岗岩和含黑云二长花岗质片麻岩。调查区内供水水源、河流及民用水井中水体的放射性核素浓度值均较低,水源安全。
Based on the natural radiation environmental geological survey in the middle east part of Wulian County,the author analyzed the characteristics,distribution and influencing factors of radioactivity. The results show that,in the natural radioactive background of the investigation area,the background value of γ-radiation dose rate is 80.0 n Gy/h,and the average annual effective dose of public exposure is 0.46 mSv. The high background area of natural radiation is mainly expressed by the abnormal characteristics of γ-radiation dose rate and the radionuclide 232 Th content,and its main lithology includes monzogranites and biotite monzonitic granitic gneiss. In the investigation area,the radionuclide concentration in water supply,river and water well is low,and hence the water source is safe.
Based on the natural radiation environmental geological survey in the middle east part of Wulian County,the author analyzed the characteristics,distribution and influencing factors of radioactivity. The results show that,in the natural radioactive background of the investigation area,the background value of γ-radiation dose rate is 80.0 n Gy/h,and the average annual effective dose of public exposure is 0.46 mSv. The high background area of natural radiation is mainly expressed by the abnormal characteristics of γ-radiation dose rate and the radionuclide 232 Th content,and its main lithology includes monzogranites and biotite monzonitic granitic gneiss. In the investigation area,the radionuclide concentration in water supply,river and water well is low,and hence the water source is safe.
引文
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[15]UNSCEAR.United Nations Scientific Committee on the Effects of Atomic Radiation[R].New York:Exposure from natural sources of radiation,United Nations,2000.
[2]章晔,华荣州,石柏慎.放射性方法勘查[M].北京:原子能出版社,1990.
[3]韩耀昭,刘腾耀.高精度放射性测量及其应用[J].物探与化探,1992,16(5):345-351.
[4]吴慧山,林玉飞,白云生,等.氡气测量方法与应用[M].北京:原子能出版社,1990.
[5]代杰瑞,鲁峰,庞绪贵,等.青岛市地表伽玛辐射特征及环境影响评价[J].世界地质,2012,31(4):214-223.
[6]张春法,姜怀坤,吕振生.济南—淄博—泰安地区地表伽玛辐射特征及环境影响评价[J].山东国土资源,2013,29(6):23-28.
[7]姚毅峰.伽玛能谱测量在环境天然放射性水平评价中的应用[J].四川地质学报,2002,22(3):188-192.
[8]方方,李宽良,侯新生,等.野外多道伽马能谱测量在核环境地质评价中的应用[J].物探与化探,2000,24(1):7-11.
[9]曾兵,葛良全,刘合凡,等.成都经济区天然放射性环境评价[J].物探与化探,2010,34(1):79-84.
[10]黄元清.城市环境天然放射性评价研究[D].成都:成都理工大学,2005,39.
[11]代杰瑞,董志成,喻超.青岛市地表天然放射性水平及其主控因素特征[J].世界核地质科学,2012,29(3):173-182.
[12]徐东辰,王卫平.山东黄河口地区环境放射性辐射水平及评价[J].物探与化探,2000,24(3):178-183.
[13]李星洪.辐射防护基础[M].北京:原子能出版社,1982.
[14]夏宁,姜学钧,刁少波,等.青岛市天然放射性环境地质调查[J].物探与化探,2008,32(5):559-563.
[15]UNSCEAR.United Nations Scientific Committee on the Effects of Atomic Radiation[R].New York:Exposure from natural sources of radiation,United Nations,2000.