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| | Abstract | | In March 2011, Fukushima Daiichi Nuclear power Plant suffered major damage from a 9.0 earthquake and subsequent tsunami. By this disaster, materials contaminated by radioactive cesium were generated in large quantities. A large amount of the wastes were burned in incineration plants. Therefore the incineration ashes contain a lot of radioactive cesium. Some ashes were dumped into controlled final landfill sites. Radioactive cesium is soluble in water. Over time, percolating water containing radioactive cesium may flow out from the landfill and pollute surrounding environment. Therefore it is important to understand the behavior of radioactive cesium in landfill. In order to understand that, it is necessary to clarify water permeability in landfills. We carried out resistivity measurements in landfills to make it clear. We employ two kinds of experiments. One is a field survey, the other is a model experiment in the laboratory. By these experiments, we estimated about the movement of leachate in landfills. |
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