This document describes the analytical results of the amount of the radioactive nuclides in the Fukushima-Daiichi nuclear power plant on March 31, 2011 and the following period with the use of the ORIGEN2 code. The results are given for the irradiated uranium pellet and the activated cladding tube of zirconium alloy in the core and the spent fuel storage pools of the respective reactors. The evaluated values are weight, radioactivity, heat generation, photon generation and neutron generation rate. A CD-ROM is attached as an appendix. (author)
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Nishihara et al. (2012) studied this question.