The method according to the present invention comprises using a high-frequency vibrating stirrer that is confirmed to include a treatment tank I, a high-frequency vibrating motor 3 fixed to a table positioned above the treatment tank 1, two vibrating rods 4 extending toward the bottom of the treatment tank 1 and coupled to the table, and multistage vibrating blades 5 mounted to the lower parts of the vibrating rods 4 and surface-plated with palladium or platinum serving as a catalyst in element transmutation, characterized in that the high frequency vibrating motor 3 is controlled by an inverter 6 so as to vibrate the multistage vibrating blades 5 at a frequency of 100-170 Hz in an aqueous solution 2 containing an element to be transmuted in the treatment tank 1, thereby transmuting the element in the aqueous solution 2 into another element. By adding heavy water to the solution to be treated, the transmutation efficiency can be elevated. By adding tritium water with an appropriate concentration as a substitute for the heavy water, the element transmutation can be completed within a short period of time and, at the same time, the tritium water that is seemingly the main cause of radioactive contamination can be effectively utilized and the radioactivity thereof can be attenuated or detoxified.

The method according to the present invention comprises using a high-frequency vibrating stirrer that is confirmed to include a treatment tank I, a high-frequency vibrating motor 3 fixed to a table positioned above the treatment tank 1, two vibrating rods 4 extending toward the bottom of the treatment tank 1 and coupled to the table, and multistage vibrating blades 5 mounted to the lower parts of the vibrating rods 4 and surface-plated with palladium or platinum serving as a catalyst in element transmutation, characterized in that the high frequency vibrating motor 3 is controlled by an inverter 6 so as to vibrate the multistage vibrating blades 5 at a frequency of 100-170 Hz in an aqueous solution 2 containing an element to be transmuted in the treatment tank 1, thereby transmuting the element in the aqueous solution 2 into another element. By adding heavy water to the solution to be treated, the transmutation efficiency can be elevated. By adding tritium water with an appropriate concentration as a substitute for the heavy water, the element transmutation can be completed within a short period of time and, at the same time, the tritium water that is seemingly the main cause of radioactive contamination can be effectively utilized and the radioactivity thereof can be attenuated or detoxified.

A molten salt reactor includes a reactor vessel and a molten salt contained within the reactor vessel and undergoing a nuclear reaction. The molten salt includes insoluble metal fission products and dissolved gas fission products produced by the nuclear reaction. There is a separation unit configured to receive the molten salt and remove the insoluble metal fission products and dissolved gas fission products from the molten salt. The separation unit includes a laundering chamber into which the molten salt is introduced to form a froth containing the insoluble metal fission products and dissolved gas fission products. There is a filtration chamber, interconnected to the laundering chamber, configured to receive the froth from the laundering chamber and separate from the froth the insoluble metal fission products and dissolved gas fission products.

A sparger includes a main pipe connecting inside and outside of a water tank having a storage space therein for storing cooling water, so as to define a flow path through which steam and air containing radioactive materials generated outside the water tank are discharged into the cooling water, a header part connected to one end portion of the main pipe located in the storage space, and having a storage chamber in which the steam and air transferred through the main pipe are collected, and a plurality of discharge nozzles disposed in a spacing manner, each having inlet and outlet formed on one end located in the storage chamber and another end located in the storage space, respectively, to discharge the steam and air from the storage chamber to the storage space, and at least some of the plurality of discharge nozzles protruding from the header part by different lengths.

Systems and/or methods for producing free elements, systems and/or methods for producing element storage/generation vessel assemblies, element storage/generation vessel assemblies, system and/or methods for purifying elements and providing a progeny generating assemblies are provided.

A device for mixing powders by cryogenic fluid, characterised in that it comprises at least: a chamber for mixing powders, comprising a cryogenic fluid; a chamber for supplying powders in order to allow the powders to be introduced into the mixing chamber; means for agitation in the mixing chamber so as to allow the mixing of the powders placed in suspension in the cryogenic fluid.

A sparger includes a main pipe connecting inside and outside of a water tank having a storage space therein for storing cooling water, so as to define a flow path through which steam and air containing radioactive materials generated outside the water tank are discharged into the cooling water, a header part connected to one end portion of the main pipe located in the storage space, and having a storage chamber in which the steam and air transferred through the main pipe are collected, and a plurality of discharge nozzles disposed in a spacing manner, each having inlet and outlet formed on one end located in the storage chamber and another end located in the storage space, respectively, to discharge the steam and air from the storage chamber to the storage space, and at least some of the plurality of discharge nozzles protruding from the header part by different lengths.

Systems and/or methods for producing free elements, systems and/or methods for producing element storage/generation vessel assemblies, element storage/generation vessel assemblies, system and/or methods for purifying elements and providing a progeny generating assemblies are provided.

Disclosed herein is an aerosol generating and mixing system operating at a high temperature and a high pressure which includes an aerosol generating device; and an aerosol mixing device, wherein the aerosol generating device includes a pre-mixing tank and a mixing tank, and the mixing tank and the pre-mixing tank include a wing configured to rotate about a central shaft of the tank so as to agitate an inside aerosol, and an agitating motor configured to rotate the wing, and a filling nozzle of the mixing tank and the pre-mixing tank is configured to inject any of an aerosol aqueous solution and an aerosol particle.

A device for mixing powders by cryogenic fluid, characterised in that it comprises at least: a chamber for mixing powders, comprising a cryogenic fluid; a chamber for supplying powders in order to allow the powders to be introduced into the mixing chamber; means for agitation in the mixing chamber so as to allow the mixing of the powders placed in suspension in the cryogenic fluid.