A detector system for searching lost γ-ray source

Khan Waseem; He Chaohui; Cao Yu; Khan Rashid; Yang Weitao

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자료유형: 학술저널

저자정보: Khan Waseem He Chaohui Cao Yu Khan Rashid Yang Weitao

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제52권 제7호

발행연도: 2020.1

수록면: 1,524 - 1,531 (8page)

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The aim of this work is to develop a Geiger-Muller (GM) detector system for robot to look for a radioactive source in case of a nuclear emergency or in a high radiation environment. In order to find a radiation source easily, a detector system, including 3 detectors, was designed to search g-ray radiation sources autonomously. First, based on GEANT4 simulation, radiation dose rates in 3 Geiger-Muller (GM) counters were simulated at different source-detector distances, distances between detectors and angles. Various sensitivity analyses were performed experimentally to verify the simulated designed detector system. A mono-energetic 137Cs g-ray source with energy 662 keV and activity of 1.11 GBq was used for the observation. The simulated results were compared with the experimental dose rate values and good agreements were obtained for various cases. Only based on the dose rates in three detectors, the radiation source with a specific source activity and angle was localized in the different location. A method was adopted with the measured dose rates and differences of distances to find the actual location of the lost g-ray source. The corresponding angles of deviation and detection limits were calculated to determine the sensitivity and abilities of our designed detector system. The proposed system can be used to locate radiation sources in low and high radiation environments

참고문헌 (22)

참고문헌 신청

K. Boudergui / 2010 / Integrated sensor handled by robot for dose rate measurement / Proceeding of ISOE

E. Mishani / 1999 / Radiation levels in cyclotron-radiochemistry facility measured by a novel comprehensive computerized monitoring system / Nucl. Instrum. Methods Phys. Res. A 425:332~342

S. M. Brennan / 2005 / Radioactive source detection by sensor networks / IEEE Trans. Nucl. Sci 52:813~819

Romain Coulon / 2017 / Large-volume and room-temperature gamma spectrometer for environmental radiation monitoring / Nuclear Engineering and Technology 49(7):1489~1494

박경진 / 2019 / Ambient dose equivalent measurement with a CsI(Tl) based electronic personal dosimeter / Nuclear Engineering and Technology 51(8):1991~1997

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