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
,
2
,
3
;
Jiangqi FANG
1
,
2
,
3
;
Wenfeng ZHANG
1
,
2
,
3
;
Linfeng LIU
1
,
2
,
3
;
Mingyang WU
1
,
2
,
3
;
Guochen NIU
1
,
2
,
3
Author Information
1. Airborne Survey and Remote Sensing Center of Nuclear Industry, Shijiazhuang 050002 China
2. CNNC Engineering Technology Research Center of Airborne Monitoring for Nuclear Emergency
3. 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.
