Nonintrusive Depth Estimation of Buried Radioactive Wastes Using Ground Penetrating Radar and a Gamma Ray Detector
Nonintrusive Depth Estimation of Buried Radioactive Wastes Using Ground Penetrating Radar and a Gamma Ray Detector
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DOI：
10.3390/rs11020141
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发表时间：
2019-01-01
期刊：
影响因子：
5
通讯作者：
Aspinall, Michael D.
中科院分区：
文献类型：
--
作者：
Ukaegbu, Ikechukwu K.;Gamage, Kelum A. A.;Aspinall, Michael D.
本研究报告的数据相结合，从探地雷达（GPR）和伽马射线探测器的非侵入式深度估计埋放射源。使用探地雷达是为了根据辐射数据估计计算辐射源深度所需的物质密度。四种不同的模型，用于体积密度估计进行了分析，使用三种材料，即：砂，砾石和土壤。结果表明，探地雷达能够估算出三种材料的堆积密度，平均误差为4.5%。然后，将密度估计值与伽马射线测量值一起使用，成功地估计了所调查的三种材料中每种材料中埋藏的658 kBq铯-137放射源的深度。然而，由于随着深度增加，估计深度与测量深度的偏差，需要将线性校正因子应用于深度估计。探地雷达的这一新的应用将进一步扩展这一无处不在的地球物理工具的可能应用领域。
This study reports on the combination of data from a ground penetrating radar (GPR) and a gamma ray detector for nonintrusive depth estimation of buried radioactive sources. The use of the GPR was to enable the estimation of the material density required for the calculation of the depth of the source from the radiation data. Four different models for bulk density estimation were analysed using three materials, namely: sand, gravel and soil. The results showed that the GPR was able to estimate the bulk density of the three materials with an average error of 4.5%. The density estimates were then used together with gamma ray measurements to successfully estimate the depth of a 658 kBq ceasium-137 radioactive source buried in each of the three materials investigated. However, a linear correction factor needs to be applied to the depth estimates due to the deviation of the estimated depth from the measured depth as the depth increases. This new application of GPR will further extend the possible fields of application of this ubiquitous geophysical tool.