METHOD OF DUMPING OF TECHNOLOGICAL MINE FOR RADIOACTIVE WASTES AT DECOMMISSIONING OF URANIUM GRAPHITE REACTOR Russian patent published in 2017 - IPC G21F7/00 

FIELD: physics.

SUBSTANCE: method of dumping of a technological mine for radioactive waste during decommissioning of a uranium-graphite reactor, whereby the level of clarified river water is reduced to the level of the upper edge of the solid radioactive waste mound. The available solid radioactive waste is extracted from the process shaft, while the operation is repeated until the mine capacity is completely drained. The bottom sediments formed during the exploitation of the mine are extracted and tempered. In the side wall, at the level of the ground surface, a hole is drilled into which a metal pipe set is installed with nozzles for supplying compressed air and a deflecting head. In the center of the technological shaft, along the entire height, another pipe is mounted, the lower part of which is sealed. By injecting loose material through the stacking pipe, security barriers are created within the process shaft. The process of shrinkage and possible cavity formation is controlled by neutron-neutron logging.

EFFECT: invention makes it possible to transfer the technological shaft to a radiation-safe state.

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