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[2A16] Rational Disposal of Contaminated Concrete Waste with Assessing Migration Behavior of Nuclide Ions
Keywords:Radioactive waste, Concrete, Recycled aggregate, Nuclide ions, Migration behavior, X-ray CT, Elemental analysis
Radioactive concrete waste disposal is a major concern in decommissioning of the Fukushima Daiichi Nuclear Power Plant. The rational disposal effectively renders concrete recycling, leading to substantial reduction of waste volume. Meanwhile, it’s crucial to study radionuclide ions migration behavior in recycled concrete when the radioactive concrete waste is reused for new concrete. Recycled aggregates from simulated radioactive concrete waste are fabricated with covering cement paste in this study. Re-produced concrete specimen is prepared to quantitatively assess the migration behavior of radionuclides with using X-ray CT images analysis and elemental analysis by LIBS. The results provide the findings on radionuclide ions within the concrete, highlighted the significant impact of change in water absorption ratio of the contaminated aggregates on migration.
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