Artificial multi-barrier for a radioactive waste treatment facility
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United States of America Patent
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Feb 11, 2014
Grant Date -
Apr 28, 2011
app pub date -
Jun 15, 2009
filing date -
Jun 19, 2008
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Abstract
A concrete pit containing radioactive waste is surrounded by a low diffusion layer of cement-based material, which in turn, is surrounded by a low water permeability layer of sodium-type bentonite and the leaching out of calcium ions from the low water permeability layer is inhibited by mixing sodium bicarbonate or sodium carbonate with the sodium-type bentonite/sand mixture of the low water-permeability layer so that leached calcium ions form a barrier layer having calcium carbonate as the main component in the vicinity of the interface between the layers.
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