Nuclide inventory evaluation in the cores of Fukushima Dai-ichi Nuclear Power Station at the time of the nuclear accident

Okamoto, Tsutomu; Okumura, Keisuke ; Kojima, Kensuke; Hagura, Hiroyuki; Suyama, Kenya; Nagase, Fumihisa 

Three-dimensional nuclides inventory evaluation was carried out for each core of unit-1, 2, 3 in the Fukushima Dai-ichi Nuclear Power Station at the time of the nuclear accident. In the evaluation, the modular system for reactor analyses (MOSRA) and the latest Japanese nuclear data library JENDL-4.0 were employed. The obtained inventory data is useful for the assessment of the broken core situation, planning of future disposal of radioactive wastes, such as fuel debris, polluted rubble, and so on.