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概要

In this study, an alternative method to retrieve fuel debris and MCCI (Molten Corium Concrete Interaction) products in Fukushima Daiichi Nuclear Power Plants is proposed, where geopolymer is used for semi-stabilization of those debris. Facing the realization of this method, the fluidity and the setting time of geopolymer are regarded as one of the problems. Thus, for investigating those properties, slump flow experiment, funnel experiment and viscosity measurement will be done. In addition, the experimental results were reproduced in the simulation with one of the newest particle method which can describe the rotation behavior of the fluid’s tip. Research is still now ongoing, and final goal of this research is to demonstrate the potential of geopolymer for utilization in Fukushima decommissioning.

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