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Report No.
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Sensitivity analysis on safety functions of engineered and natural barriers for fuel debris disposal

Shimada, Taro; Nishimura, Yuki; Takeda, Seiji

A disposal measure for fuel debris generated at the accident in the Fukushima Daiichi Nuclear Power Station has been studied so far. However, physical and chemical properties of the fuel debris have not yet investigated in reactor containment vessels. In order to investigate the safety function of barriers required for disposal of fuel debris, sensitivity analyses for radionuclide migration were carried out, considering with uncertainty of the properties. As a result, it is indicated that it was important for evaluation of fuel debris disposal to obtain the physical and chemical properties of $$^{14}$$C and $$^{129}$$I during release to groundwater, in addition to $$^{238}$$U.

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