Radiochemical analysis of rubble and trees collected from Fukushima Daiichi Nuclear Power Station

Tanaka, Kiwamu ; Shimada, Asako ; Hoshi, Akiko ; Yasuda, Mari; Ozawa, Mayumi ; Kameo, Yutaka 

To characterize the rubble and trees contaminated by radionuclides released by the recent accident at the Fukushima Daiichi Nuclear Power Station, the radiochemical analysis protocols were modified using those developed by the Japan Atomic Energy Agency for the waste generated by radionuclide-treating laboratories and research reactors. The radioactivity concentrations of -ray-emitting nuclides Co, Nb, Eu, and Eu, and -ray-emitting nuclides C, I, Cl, Se, and Tc were successfully measured by the modified analytical method. This analysis successfully clarified the characteristics of the radioactivity concentrations of the rubble and trees and identified issues that should be considered to obtain a deeper understanding of these characteristics.