Covering structure for extremely-low-radioactivity solid waste landfill
A solid waste, covering structure technology, applied in infrastructure engineering, protection devices, buildings, etc., can solve the problems of large quantity, high degree of harm, low level of radioactivity, etc., achieve strong absorption and isolation, prevent pollution, prevent The effect of outward migration
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[0064] figure 1 A schematic structural diagram of a covering structure for a very low-level radioactive solid waste landfill of this embodiment is shown.
[0065] Such as figure 1 As shown, the covering structure for very low-level radioactive solid waste landfill includes filling layer 2, soil layer 3, clay layer 4, sodium-based bentonite cushion layer (GCL) 5, and high-density polyethylene film layer from bottom to top. (HDPE film) 6, drainage layer 7, supporting soil layer 8, nutrient soil layer 9 and vegetation 10;
[0066] The filling layer 2 includes bentonite and graded gravel, and the particle size of the graded gravel is 0.25mm-5mm, which is filled in the space between and around the sealed storage tanks 1 containing extremely low-level radioactive solid waste. The top of the sealed storage tank 1 with extremely low-level radioactive solid waste, the average thickness of the soil layer 3 is ≥500mm, and the permeability coefficient is ≤1·10 -5 cm / s to prevent the sp...
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