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Sensors 2018, 18(5), 1612; https://doi.org/10.3390/s18051612

A Model for Remote Depth Estimation of Buried Radioactive Wastes Using CdZnTe Detector

1
Engineering Department, Lancaster University, Lancaster LA1 4YW, UK
2
School of Engineering, University of Glasgow, Glasgow G12 8QQ, UK
*
Author to whom correspondence should be addressed.
Received: 10 April 2018 / Revised: 11 May 2018 / Accepted: 15 May 2018 / Published: 18 May 2018
(This article belongs to the Section Remote Sensors)
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Abstract

This paper presents the results of an attenuation model for remote depth estimation of buried radioactive wastes using a Cadmium Zinc Telluride (CZT) detector. Previous research using an organic liquid scintillator detector system showed that the model is able to estimate the depth of a 329-kBq Cs-137 radioactive source buried up to 12 cm in sand with an average count rate of 100 cps. The results presented in this paper showed that the use of the CZT detector extended the maximum detectable depth of the same radioactive source to 18 cm in sand with a significantly lower average count rate of 14 cps. Furthermore, the model also successfully estimated the depth of a 9-kBq Co-60 source buried up to 3 cm in sand. This confirms that this remote depth estimation method can be used with other radionuclides and wastes with very low activity. Finally, the paper proposes a performance parameter for evaluating radiation detection systems that implement this remote depth estimation method. View Full-Text
Keywords: remote depth profiling; attenuation model; radiation detection; radioactive contamination; radiological characterisation; nuclear wastes; nuclear decommissioning; cadmium zinc telluride remote depth profiling; attenuation model; radiation detection; radioactive contamination; radiological characterisation; nuclear wastes; nuclear decommissioning; cadmium zinc telluride
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Ukaegbu, I.K.; Gamage, K.A.A. A Model for Remote Depth Estimation of Buried Radioactive Wastes Using CdZnTe Detector. Sensors 2018, 18, 1612.

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