Patent Number: 
Section: claims

1. An apparatus for separating radioactive nuclides from a waste salt and recovering a refined salt, comprising:a vaporization chamber having a reaction container installed therein for accommodating a waste salt;a first top cover provided with a stirrer configured to agitate the waste salt accommodated in the reaction container of the vaporization chamber;a second top cover provided with a first electric heater configured to distill the waste salt under a reduced pressure and mutually replaceable with the first top cover provided with the stirrer when a chemical conversion reaction of the waste salt using the stirrer is completed;a condensation chamber in which salt steam produced by heating the vaporization chamber is condensed and liquefied;a decompression device configured to decompress inner parts of the vaporization chamber and the condensation chamber to a predetermined pressure;a recovery container which is disposed at the bottom of the condensation chamber and in which the salt vapor liquefied at the condensation chamber precipitates to be recovered; anda bottom cover switchably installed at the bottom of the condensation chamber to unload the recovery container. 2. The apparatus of claim 1, wherein a baffle coupled to the stirrer is installed in the reaction container to be adjacent to an inner wall of the reaction container. 3. The apparatus of claim 2, further comprising an upward/downward driving device driven to lift the stirrer and the baffle upward at the same time. 4. The apparatus of claim 1, further comprising a top cover opening/closing device configured to automatically open and close the first top cover or the second top cover. 5. The apparatus of claim 1, further comprising a bottom cover opening/closing device configured to automatically open and close the bottom cover. 6. The apparatus of claim 1, further comprising:a second electric heater configured to heat the vaporization chamber; anda third electric heater and a fourth electric heater configured to heat upper and lower portions of the condensation chamber, respectively,wherein the heating by the second electric heater, the third electric heater and the fourth electric heater is controlled in sequentially decreasing temperatures so that a temperature gradient in the vaporization chamber and the condensation chamber is formed to facilitate the flow of salt vapor. 7. The apparatus of claim 6, wherein the vaporization chamber is decompressed to a predetermined pressure by means of the decompression device while the waste salt is heated by the second electric heater to a predetermined temperature at which the waste salt is able to be smoothly vaporized. 8. The apparatus of claim 1, wherein a cooling water circulation passage is formed at the bottom of the recovery container.