SUBLIMATION APPARATUS Russian patent published in 2005 - IPC

FIELD: enrichment of uranium isotopes.

SUBSTANCE: the invention presents a sublimation apparatus and is dealt with the field of enrichment of uranium isotopes. The apparatus contains a cylindrical body (1) encased in a heat-insulating casing (2). In the center of the apparatus there is an insert (24) filled in with a neutron absorber, for example, with boron carbide. The ring-type sublimation chamber (3) and the chamber for heat-transfer agents (4) are mounted coaxially to the insert (24). The apparatus works in modes of desublimation and a sublimation. At operation in the mode of desublimation through a connecting pipe (9) into the ring-type collector (8)they feed a refrigerant distributed through heat exchange tubes (10) of the chamber for heat-transfer agents (4). Waste refrigerant is removed from the chamber (4) through a manifold (11), removing pipes (12), the ring-type collector (13) and a connecting pipe (14). The walls (5 and 6) of The sublimation chamber (3) are heated by a heater (7). A mix of vapors of uranium hexafluoride and noble gases is fed through a connecting pipe (19), distribute it along a ring-type space of the upper part of the chamber (3)and fed into ring-type cells (21). Desublimation of uranium hexafluoride is carried out on the surface of the heat exchange pipes (10) and on cross-connectors 22. Aerosols are sublimated at contact with heated walls (5 and 6). With the help of a flanging (16) on partitions (15) duration of contact of the aerosols with the walls (5 and 6) is increased. Due to that a degree of desublimation of uranium hexafluoride is increased. The surface of desublimation is enlarged due to the connectors (22). At operation in the sublimation mode the feeding of a refrigerant and a mix of vapors of uranium hexafluoride with a noble gas is stopped. Using the heater (7) the temperature in the apparatus is raised up to the temperature of uranium hexafluoride sublimation. Products of sublimation are removed through a connecting pipe (23). The apparatus is reliable, cost-saving, allows to increase a degree of trapping of uranium hexafluoride.

EFFECT: the apparatus is reliable, cost-saving, allows to increase a degree of trapping of uranium hexafluoride.

4 cl, 3 dwg