[2M09-14] Environmental Radioactivity 3

[2M12] Investigation on distribution of radioactive substances in Fukushima

(18)Spatiotemporal Integration of Radiation Dose Rate Data across Scales

*Haruko Murakami Wainwright¹, Dajie Sun², Akiyuki Seki³, Hiroshi Takemiya³, Kimiaki Saito³ (1. Lawrence Berkeley National Laboratory, 2. University of California, Berkeley, 3. JAEA)

Keywords:Fukushima , Radiation air dose rate, Kalman filter

In this work, we have developed a methodology to estimates the spatiotemporal distribution of radiation air dose rates around Fukushima Daiichi Nuclear Power Plant (FDNPP). Within the framework, we first predict the log-linear decay trend using the Random Forest, and the fluctuations of air dose rate time-series using the Gaussian Process model. The Kalman filter is then used to reconstruct the prediction of the dose rate time series for locations with real-time or historical measurements, including the fluctuation and linear trend.