미신고지역의 환경 방사선 검출을 위한 전개형 검출기 개발
Development of Deployable Detector for Environmental Radiation Detection in Unknown Areas
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For the denuclearization, nuclear activities must be reported and the reporteddocuments must be confirmed through nuclear disarmament verification process. Samplingfrom undeclared area is an essential task of the verification to obtain information about theconcealment of nuclear material. However, it is not possible to get the environmental radioactivityinformation of undeclared areas, so the safety of workers for sampling cannot be guaranteed. Therefore, before collecting samples, it is necessary to secure the information about radioactivityof the sampling region through the radiation measurement. In this study, we propose a compactgamma detection probe that can be transported by drones and distributed over a wide area in ashort period of time. A plastic scintillator was applied to reduce weight and increase efficiency. In addition, the total weight and power consumption of the probe were optimized by applying ameasurement method that counts photons generated from the scintillator. The performance of theprobe was evaluated under the same dose conditions as the actual measurement environment. Itwas confirmed that the probe developed in this study exceeded more than twice the count value ofbackground radiation at 25 meters. In addition, it was confirmed that the count value increased ata linear rate as the dose rate. As a result, it is possible to estimate the dose rate from the measuredcount value.
Abstract
For the denuclearization, nuclear activities must be reported and the reporteddocuments must be confirmed through nuclear disarmament verification process. Samplingfrom undeclared area is an essential task of the verification to obtain information about theconcealment of nuclear material. However, it is not possible to get the environmental radioactivityinformation of undeclared areas, so the safety of workers for sampling cannot be guaranteed. Therefore, before collecting samples, it is necessary to secure the information about radioactivityof the sampling region through the radiation measurement. In this study, we propose a compactgamma detection probe that can be transported by drones and distributed over a wide area in ashort period of time. A plastic scintillator was applied to reduce weight and increase efficiency. In addition, the total weight and power consumption of the probe were optimized by applying ameasurement method that counts photons generated from the scintillator. The performance of theprobe was evaluated under the same dose conditions as the actual measurement environment. Itwas confirmed that the probe developed in this study exceeded more than twice the count value ofbackground radiation at 25 meters. In addition, it was confirmed that the count value increased ata linear rate as the dose rate. As a result, it is possible to estimate the dose rate from the measuredcount value.
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