A large amount of contaminated rubbles were generated by the accident at the Fukushima Daiichi Nuclear Power Station (F1NPS). For safe decommissioning of F1NPS, it is important to evaluate the composition and concentration of radionuclides in the rubbles. In this paper, to characterize the rubbles collected at F1NPS, radiochemical analysis was operated. As a result of radiochemical analysis, gamma-ray-emitting nuclides
60Co,
137Cs and
154Eu, beta-ray-emitting nuclides
3H,
14C,
90Sr and
99Tc, and alpha-particle-emitting nuclides
238, 239+240Pu,
241Am and
244Cm were detected. In contrast,
94Nb and
152Eu concentrations were below the detection limit. Measured radioactive concentrations implied that
60Co and
90Sr concentrations depended on
137Cs concentration respectively. This analysis was characterized the radioactivity concentrations of the rubbles.
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