Reservoir storage of industrial waste with radioactive isotopes strontium-90 and cesium-137

 

(57) Abstract:

The invention relates to containers-storage of liquid industrial waste containing radionuclides of strontium and cesium in natural soils, and can be used for building system-induced geochemical barriers that purify water from radionuclides. The technical result of the invention is the construction of a simple, reliable design of storage tanks of liquid industrial wastes with radionuclides strontium-90 and cesium-137 in natural friable soils in which the water purification from radioactive isotopes. The problem is solved using the storage for industrial waste contaminated with isotopes of strontium and cesium in the form of pit placed on the walls and bottom of the clay layer. A distinctive feature of the store is that the quality of the clay used layer montmorillonite clay, on which is placed a layer of ash powder ironstone and a layer of gravel gypsum limestone gravel, and water-storage contains charophytes, Potamogeton and cattail. The components of a two-insulating layers is taken in the ratio 1 : 1. 1 C.p. f-crystals, 1 Il.

The image is in natural soils and can be used for building system-induced geochemical barriers, to purify water from radionuclides.

There is a method to prevent pollution of the environment with toxic and radioactive metals, which originally defined the location and flow direction of migration of heavy or toxic metals to form stable complexes in the rock mass. Then on his way stack sequentially buffer layer of the sulphides and the barrier of fine granular clays. (U.S. Pat. RF N 2075125, IPC G 21 F 9/20, 10.03.97). As the prototype was taken reservoir storage of liquid industrial waste with radioactive isotopes strontium-90 and cesium-137 (Sobolev, I. A. and others "Disposal of radioactive waste at centralized points", Energoatomizdat, 1983. S. 75 - 77).

The disadvantage of the prototype is the complexity and lack of reliability design of storage tanks.

The objective of the invention is the construction of a simple, reliable design of storage tanks of liquid industrial wastes with radionuclides: strontium-90 and cesium-137 in natural friable soils in which the water purification from radioactive isotopes.

The problem is solved using the storage for industrial waste contaminated hard">

A distinctive feature of the store is that the quality of the clay used layer montmorillonite clay, on which is placed a layer of ash with goethite, i.e. powder ironstone, and a layer of gravel gypsum limestone gravel, and water-storage contains charophytes, Potamogeton and cattail. The components of a two-insulating layers is taken in the ratio 1:1.

The drawing shows a cross section of storage for liquid industrial wastes with radionuclides of strontium and cesium.

The store is made in the form of excavation in soft soil 1. Multi-layer insulation of the walls and bottom includes: 2 - layer montmorillonite clay, layer 3 is a mechanical mixture of ash powder ironstone in the ratio of 1:1, layer 4 is a mechanical mixture of gravel gypsum limestone gravel in the ratio of 1:1. Store posted by liquid waste 5 contaminated with radioactive isotopes of strontium and cesium. The side of the store surrounded by chopping the dirt embankment 6. Reservoir storage contains charophytes, Potamogeton and cattail 7.

The essence of the invention lies in the fact that the store creates a complex system of technogenic geochemical barriers. System geo is coherence.

On bottom of the pit and the walls are covered with a layer of montmorillonite clay 2, which performs the function of geochemical sorption barrier that holds ions of strontium and cesium and thereby clears the infiltration flow from radionuclides.

Then poured a layer 3 ash powder brown hematite or red mud (a waste from alumina production) in a 1:1 ratio. The mixture is multifunctional: it creates an alkaline geochemical barrier, which coagulated containing strontium and cesium pulvinate complexes. It performs the task and geochemical sorption barrier, which delayed the cations of strontium-90 and cesium-137.

A mixture of 3 fits a mechanical mixture of 4 out of gravel gypsum limestone gravel in the ratio of 1:1.

Next, on the layer 4 filled with liquid waste 5 contaminated with isotopes of strontium-90 and cesium-137. In reservoir storage divorce charophytes, Potamogeton and cattail 7.

Self-purification of aquatic environment in the vault begins in the water column, where the aquatic plant Potamogeton and cattail will be taken from the solution ion Cs+and charophytes - strontium ions and accumulate them on phytogenic geochemical barrier in plant tissues.

UP>2+not captured phytogenic barrier, Myslivets of the solution of sulphate geochemical barrier and deposited on the bottom of the reservoir in the form of fine crystals of celestite (SrSO4). Ions SO42-for vysalivaniya Sr2+enter the solution in the dissolution of gypsum (CaSO42H2O), which is in the form of gravel is layer 4.

Part of the ions Sr2+and Cs+with organic matter to form soluble Sr-pulvinate and Cs-pulvinate complexes, which coagulate and precipitate in the form of hydrogels on alkaline geochemical barrier layer 3, which creates an alkaline environment in the layer 3 ash.

The rest, a small portion of the cations Sr2+and Cs+is delayed by sorption geochemical barrier layer 3 on the particles of the brown hematite or red mud, and layer 2 on the particles of montmorillonite clay.

In the end, the system technogenic geochemical barriers created in reservoir storage that clears aqueous solutions from radionuclides strontium-90 and cesium-137.

1. Reservoir storage of liquid industrial waste with radioactive isotopes strontium-90 and cesium-137, made in the form of capacity with multi-layer insulation of walls and a bottom, characterized in that the lesniak and a layer of gravel gypsum and limestone gravel, moreover, the reservoir storage contains charophytes, Potamogeton and cattail.

2. Store under item 1, characterized in that each component layer contains the ingredients in the ratio of 1:1.

 

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