Practical approach of airborne gamma-ray spectrometry using UAVs for evaluating ground-level dose rates

Ji, Y.-Y.*; Ji, W.*; Kim, K.*; Kim, M. J.*; Ochi, Kotaro; Morishita, Yuki; Sanada, Yukihisa

Radiation Physics and Chemistry, 244, p.113781_1 - 113781_12, 2026/02

https://doi.org/10.1016/j.radphyschem.2026.113781

UAV-based airborne gamma-ray spectrometry enables rapid radiation mapping, but accurate estimation of ground-level ambient dose rates is difficult because of altitude attenuation, detector field-of-view effects, heterogeneous contamination, and terrain variability. We developed a practical method combining hovering-flight calibration and ground-based validation near the Fukushima Daiichi Nuclear Power Plant. Altitude correction factors were derived using a dual-exponential model and compared with tripod and backpack measurements. Results showed that heterogeneous contamination and terrain introduce systematic biases if correction factors are derived under non-uniform conditions, while calibration at uniform sites improves agreement. The proposed approach demonstrates that UAV airborne surveys can reliably estimate spatial dose-rate distributions when site-dependent corrections are applied.

Development of Aerial Gamma Radiation Survey System,Analysis of Flight Experiment in Artidicial Gamma Radiation Field

; ; ; ; ;

JAERI-M 84-241, 120 Pages, 1985/01

JAERI-M-84-241.pdf:3.68MB

no abstracts in English

-ray spectroscopy study in intense -ray fields using a small LBC scintillator for an in situ nuclear fuel debris assay

Kaburagi, Masaaki; Ishii, Junya*; Kato, Masahiro*

no journal, ,