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| The investigation of natural radiation environmental geology of middle east Wulian County |
| Zheng-Feng BI |
| Shandong Provincial No.4 Institute of Geology and Mineral Survey, Weifang 261021, China) |
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Abstract 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 nGy/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 232Th 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.
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Received: 02 January 2018
Published: 03 August 2018
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| 岩石名称 | 统计点数 | 剂量范围/(nGy/h) | 算术均值/(nGy/h) | | 花岗质片麻岩 | 55 | 245~734 | 482 | | 伟晶岩化带 | 45 | 253~525 | 402 | | 花岗斑岩 | 33 | 82~122 | 105 | | 二长花岗岩 | 47 | 107~152 | 125 | | 砂岩 | 76 | 62~80 | 69 | | 安山岩 | 38 | 67~87 | 73 | | 巨砾岩 | 30 | 100~122 | 112 | | 大理岩 | 41 | 41~81 | 67 | | 第四系沉积物 | 45 | 45~67 | 55 |
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| 工程类别 | 统计点数 | 剂量范围/(nGy/h) | 算术均值/(nGy/h) | | 水泥路面 | 72 | 56~159 | 100.5 | | 柏油路面 | 55 | 52~103 | 76.2 | | 水泥质铺砖 | 43 | 65~110 | 86.8 | | 花岗岩铺砖 | 34 | 136~169 | 155.4 |
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| γ能谱测量 | 环境天然放射性评价 | 换算 | | 项目 | 单位 | 项目 | 单位 | | 238U | 10-6 | | 238U | Bq/kg | 1×10-6=12.35 Bq/kg | | 放射性核素含量 | 232Th | 10-6 | 放射性核素比活度 | 232Th | Bq/kg | 1×10-6=4.06 Bq/kg | | 40K | 10-2 | | 40K | Bq/kg | 1×10-2=313 Bq/kg |
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| 核素 | 调查区放射性核素比活
度背景值/(Bq/kg) | 标准偏差 | 山东省土壤中放射性核素平均
比活度/(Bq/kg·干) | 全国土壤中放射性核素平均
比活度/(Bq/kg·干) | | 238U | 24 | 0.8 | 32 | 43 | | 232Th | 108 | 4.5 | 48 | 56 | | 40K | 898 | 0.8 | 606 | 572 |
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| 岩石名称 | 统计点数 | 238U含量/10-6 | 232Th含量/10-6 | 40K含量/10-6 | | 二长花岗质片麻岩 | 55 | 7.3 | 192 | 4.5 | | 伟晶岩化带 | 45 | 1.9 | 148 | 5.0 | | 黑云斜长片麻岩 | 16 | 5.8 | 28.7 | 10.9 | | 花岗斑岩 | 33 | 1.4 | 17.4 | 4.6 | | 二长花岗岩 | 47 | 1.1 | 18.2 | 4.5 | | 砂岩 | 76 | 1.5 | 12 | 3.0 | | 安山岩 | 38 | 2.0 | 11 | 2.8 | | 巨砾岩 | 30 | 1.1 | 18.2 | 4.5 | | 第四系 | 45 | 1.7 | 8.4 | 2.1 |
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| 水体取样位置 | 统计点数 | 238U含量/(μg/L) | 232Th含量/(μg/L) | Ra/(Bq/L) | 40K含量/(Bq/L) | | 水源地 | 小王疃水库 | 4 | 1.29 | 0.10 | 0.02 | 49.86 | | 墙夼水库 | 4 | 5.20 | 0.35 | 0.09 | 103.81 | | 满堂峪水库 | 3 | 0.86 | 0.10 | 0.03 | 70.56 | | 长城岭水库 | 5 | 3.14 | 0.42 | 0.09 | 329.9 | | 却坡水库 | 3 | 0.96 | 0.22 | 0.02 | 72.69 | | 冯家坪水库 | 3 | 0.48 | 0.07 | 0.01 | 80.58 | | 陆家庄子水库 | 2 | 1.09 | 0.11 | 0.02 | 88.25 | | 水井 | 32 | 2.00 | 0.17 | 0.01 | 117.14 | | 其他露天水源 | 87 | 1.22 | 0.13 | 0.02 | 65.71 |
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| [1] |
丁继双, 赵瑞君, 马闻良 . 黑龙江省大兴安岭地区航放异常特征分析[J]. 世界有色金属, 2017,12(2):267-268.
|
| [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.
|
| [1] |
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| [2] |
ZENG Bing, GE Liang-Quan, LIU He-Fan, ZHANG Jin-Zhao. AN EVALUATION OF NATURAL RADIATION ENVIRONMENTAL GEOLOGY
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|
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