METHOD OF DEPTH BURYING IRRADIATED GRAPHITE OF URANIUM-GRAPHITE NUCLEAR REACTORS Russian patent published in 2017 - IPC G21F9/24 G21F9/16 

FIELD: physics.

SUBSTANCE: method includes preliminary preparation of wastes for deep burial, selection of tectonically stable sections of the earth's crust. In the selected areas of the earth's crust, a borehole is drilled to a depth of up to 3,500 m and concurrently casing and cementing the annular space are carried out. Perforation is performed in the lower part of the wellbore. The perforation area is cut off by the packer. Irradiated graphite is mechanically crushed to form graphite particles of less than 0.05 mm in size. A mixture of crushed graphite (up to 250 g/l), bentonite (up to 100 g/l) and propane (up to 20 g/l) is prepared in water. Hydraulic fracturing of the prepared seams is performed, without reducing the pressure in the well, isolating the wastes, closing and installing the cement cup. Subsequent operations are performed by lifting the fracture sites up the well to a depth of 1000 m.

EFFECT: reliable isolation in tectonically stable seams of the earth's crust.

3 cl, 2 dwg