Abstract
A MELCOR model of Fukushima Daiichi Unit 1 accident was
developed. The model is based on publicly available
information, and the MELCOR input file is published as
Electronic Supplementary data with this paper. In order
to reproduce the measured containment pressure, it was
necessary to model a leak from the reactor coolant
system. Recirculation pump seal leak, starting 5 h after
the earthquake, was assumed in this study. The reactor
pressure vessel lower head was calculated to fail, and
all fuel was discharged to the containment. Almost all of
the radioactive noble gases and about 0.05% of the cesium
inventory were released to the environment, according to
this calculation. Calculated release rates from Units 1,
2, and 3 were compared with measured radiation dose rate
in the plant area.
Original language | English |
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Pages (from-to) | 1-11 |
Journal | Annals of Nuclear Energy |
Volume | 85 |
DOIs | |
Publication status | Published - 2015 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Fukushima accident
- MELCOR
- severe accident