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Report No.
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Radionuclide release to stagnant water in the Fukushima-1 Nuclear Power Plant

Nishihara, Kenji ; Yamagishi, Isao ; Yasuda, Kenichiro  ; Ishimori, Kenichiro ; Tanaka, Kiwamu ; Kuno, Takehiko ; Inada, Satoshi; Goto, Yuichi 

After the severe accident at the Fukushima-1 nuclear power plant, large amounts of contaminated stagnant water have accumulated in turbine buildings and their surroundings. This rapid communication reports calculation of the radionuclide inventory in the core, collection of measured inventory in the stagnant water, and estimation of radionuclide release ratios from the core to the stagnant water. This evaluation is based on data obtained before June 3, 2011. The release ratios of tritium, iodine, and cesium were several tens of percent, whereas those of strontium and barium were smaller by one or two orders of magnitude. The release ratios in the Fukushima accident were equivalent to those in the TMI-2 accident.

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Category:Nuclear Science & Technology

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