Detection and consideration of radiation abnormalities in public areas
10.13491/j.issn.1004-714X.2024.04.006
- VernacularTitle:公众活动区域辐射异常的发现与思考
- Author:
Jinzheng YANG
1
;
Jiangqi FANG
1
;
Wenfeng ZHANG
1
;
Linfeng LIU
1
;
Mingyang WU
1
;
Guochen NIU
1
Author Information
1. Airborne Survey and Remote Sensing Center of Nuclear Industry, Shijiazhuang 050002 China;CNNC Engineering Technology Research Center of Airborne Monitoring for Nuclear Emergency; Shijiazhuang 050002 China.
- Publication Type:OriginalArticles
- Keywords:
Unmanned aerial vehicle;
Radiation abnormality;
Airborne monitoring
- From:
Chinese Journal of Radiological Health
2024;33(4):384-389
- CountryChina
- Language:Chinese
-
Abstract:
Objective To measure the air-absorbed dose rate of gamma radiation in public areas for the situation of the local radiation environment. Methods Using a large-volume γ spectrometer system with a NaI(Tl) detector mounted on a UAV, we conducted large-scale airborne radiation monitoring in public areas in southwestern China, to measure the air-absorbed dose rate at a height of 1 m from the earth’s surface. Results The airborne radiation monitoring data were used to analyze the local radiation environment. The mean air-absorbed dose rate at a height of 1 m was 43.6 ± 12.9 nGy/h. Seven abnormal radiation points were detected, and two of them were located where construction was ongoing. At one of the abnormal radiation points, FH40G meter measurements showed that the air-absorbed dose rate at a height of 1 m was up to 22.0 μGy/h. Field soil samples were collected for HPGe γ spectrometer analysis: the 232Th radionuclide activity concentration was 96.0 kBq/kg, and the 226Ra radionuclide activity concentration was 9.9 kBq/kg. Conclusion Using the UAV-mounted large-volume γ spectrometer system with NaI(Tl) detectors for large-scale airborne monitoring is a fast and effective method for dragnet monitoring of the level of radiation in public areas.
