KR19980043695A - Dry distillation apparatus and method for commercial production of radioactive isotope I-131 - Google Patents

Abstract

The present invention provides an electric furnace (3) having a temperature control device (5) and a power supply (7), and a central through hole (9) of the electric furnace (3) with a TeO ₂ target (13) loaded therein. I-131 collector 17, the connecting branch (19) which is in communication with the distillation vessel (11) through a connecting conduit (15) wound around the distillation vessel (11), heating band (12) is inserted into A plurality of waste gas collectors 21, the I-131 collectors 17 and the discharge vessel 23, which are in communication with the I-131 collector 17 via the first T-coke valve 25. It relates to an I-131 dry distillation apparatus composed of a solution input container 27 and a method for commercial production of radioisotope I-131 by the distillation apparatus.

Description

Dry distillation apparatus and method for commercial production of radioactive isotope I-131

The present invention relates to a dry distillation apparatus for commercial production of I-131 used as a radiopharmaceutical, and a method thereof, and more particularly, for thyroid diagnosis and tumor treatment using a TeO ₂ target irradiated with neutrons in a nuclear reactor. The present invention relates to a dry distillation apparatus and a dry distillation method for use in dry distillation of I-131 used for labeling and the like.

Today, the use range and technology of radioisotopes are rapidly developing, and the annual usage in Korea reaches 100k Curie (Ci) on average annually. Although there is a general tendency to avoid radiation from radioisotopes, this high usage is due to the inherent properties of radioisotopes. Typical among the intrinsic properties is that a small amount of radiation having a strong penetrating power can be sufficiently emitted to detect or change the material.

This is why radioisotopes make a distinct contribution to industry, medicine, and scientific research. As of 1995, more than 1000 companies using radioisotopes were radiodestructive tests, radioisotope gauges, industrial radiotracers, in-vivo diagnosis and treatment, in-vitro diagnostics, in vitro radiation therapy, radiation sterilization, radiation food research, and radiation genetic engineering. The use of radioactive isotopes in various forms, such as research, contributes to the development of industrial technology, productivity improvement, pollution prevention, industrial safety, medical technology development and welfare, food production, food preservation, and basic science development. It is true.

However, in order to enjoy the full benefits of using radioactive isotopes, the supply must be smooth and domestic radioisotopes can be sufficiently supplied. Radioactive isotopes can be produced from nuclear reactors or accelerators. In Korea, since only 2MW research reactors have been operated until recently, they have to be produced on a small scale.

In recent years, however, multipurpose research reactors have been developed to improve the self-sufficiency of radioisotopes required in Korea.In addition, as a part of research and development for mass production of radioisotope products using such reactors, additional equipment suitable for mass production They also developed together.

Among these radioisotope products, in order to produce I-131 for medical purposes, that is, for diagnosis of thyroid gland, tumor treatment, and labeled synthetase, conventionally, the method of separating the radioactive tellilium (Te) or tellilium compound by wet distillation is performed. It was used a lot.

According to this distillation method, a target made of tellilium or a tellyllium compound is irradiated by neutron irradiation in a nuclear reactor, and then after dissolving tellilium in a mixed acid, IO ₃ ⁻ is reduced to I ₂ state, Practical I-131 has been produced by distillation and collection in alkaline solution.

The production of I-131 by this method enables chemical treatment at low temperature, and it is easy to manufacture various instruments used for chemical treatment, but the operation of the processing apparatus is complicated and various reagents are used. It is very likely that impurities will be introduced and additional evaporation will be needed to increase the radioactivity concentration. In addition, a large amount of radioactive waste of the liquid is generated, there was a problem that the chemical treatment time is also long.

Various measures have been sought to solve the problems of the conventional I-131 wet distillation as mentioned above, and the present invention has also been devised to solve these problems and commercially produce.

Therefore, it is an object of the present invention to increase the radioactivity concentration of the produced I-131 in the production of I-131 to make it possible to use a high-radioactive I-131 in practical use, and to avoid the use of additional reagents, accordingly In addition to simplifying the treatment process, and also shortening the separation time, it is possible to significantly reduce the amount of liquid radioactive waste generated.

In order to achieve the above object, the present invention provides an electric furnace equipped with a temperature control device and a power supply, a distillation vessel inserted into a central through hole of an electric furnace with a TeO ₂ target inserted therein, and a heating band wound. An I-131 collector in communication with the distillation vessel via a connecting conduit, a plurality of waste gas collectors in communication with the I-131 collector via a connecting branch, a first T-coke valve between the I-131 collector and the discharge vessel. It is an object of the present invention to provide an I-131 dry distillation apparatus consisting of a solution input container.

In addition, I-131 distillation preparatory step of adding a collecting solution to the I-131 collector and charged TeO ₂ sample to the sample tube of the distillation vessel; A distillation step of opening the on / off valve of the oxygen tank while distilling TeO ₂ by reaching an internal temperature of the distillation vessel up to 760 ° C .; A collecting step of collecting ¹³¹ I ₂ gas generated in the distillation step in a collecting solution of the collector; Adjusting the pH of the reaction solution by adding carbon dioxide to the reaction solution in the collector to which the ¹³¹ I ₂ is reacted in the collecting step for a predetermined time; I-131 export step of transferring the pH-adjusted reaction solution in the pH adjustment step to the export container using a solution input device to be taken out to the outside; Waste TeO ₂ treatment step of decomposing the remaining TeO ₂ after distillation step ¹³¹ I ₂ gas by storing in a separate storage container; It is to provide an I-131 dry distillation method consisting of.

1 is a conceptual diagram schematically showing the configuration of a dry distillation apparatus according to the present invention.

Figure 2 is a detailed cross-sectional view of the guide rail for transporting the upper distillation vessel and the collector of Figure 1;

3 is a detailed cross-sectional view showing only the distillation vessel and the collector in FIGS.

4 is a detailed cross-sectional view showing a state in which a cooling vessel is additionally attached to the collector of FIG.

Explanation of symbols on the main parts of the drawings

1: dry distillation apparatus 3: electric furnace

11: distillation vessel 13: TeO ₂ target

15: connection conduit 17: I-131 collector

21: waste gas collector 23: take out container

27: solution injection container 59: oxygen gas cylinder

75: activated carbon tank 85: carbon dioxide gas cylinder

97: Na ¹³¹ I solution drawing container 201: NaOH collection solution

Hereinafter, an embodiment of the I-131 dry distillation apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figure 1, the I-131 dry distillation apparatus of the present invention is indicated by reference numeral 1. This dry distillation apparatus (1) collects a distillation vessel (11) and a distilled ¹³¹ I ₂ gas, which are entirely distilled in an electric furnace (3) containing a heating electric furnace (3), a TeO ₂ target irradiated with neutrons in the reactor. Collector 17, the collector 17 is composed of a solution injection vessel 27 for moving the reaction liquid ¹³¹ I ₂ gas collection reaction is completed to the discharge vessel (23).

Here, the electric furnace 3 is equipped with a temperature control device 5 for measuring the temperature inside the electric furnace, and a power supply device 7 for supplying power to the electric furnace 3 is connected. .

The electric furnace 3 is shown in more detail in FIG. 2, and an outer body is formed by a case 29, and a cylindrical heat transfer body 31 is mounted at the center of the case 29. have. For example, the heater 31 is a buried heater mainly used, the distillation vessel 11 is inserted in the center, and the coil is separated and wound up and down on the outer circumferential surface, the upper end of which is discharged upward, that is, upward In order to compensate for the heat, the coil is wound more than the bottom. The heat transfer body 31 is surrounded by the heat insulating material 33 between the case 29 and the side surface and the upper surface are enclosed, and heat exchange with the outside is interrupted, and a ceramic board or a ceramic fiber is used as the heat insulating material 33.

A plurality of temperature sensors 35 made of a thermocouple penetrating the case 29, the heat insulating material 33, and the heat transfer body 31 are mounted to measure the temperature inside the heat transfer body 31. On the upper surface, a plate-shaped spring 39 is provided concentrically with the through hole 9. Accordingly, when the distillation vessel 11 is inserted into the through hole 9 of the electric furnace 3, the lower flange portion 37 of the distillation vessel 11 may be elastically seated by the spring 39.

As shown in more detail in FIG. 3, the distillation vessel 11 inserted into the central through hole 9 of the electric furnace 3 with the TeO ₂ target 13 loaded therein is an upper distillation vessel 45. ) And the bottom distillation vessel (41). Here, the lower distillation vessel 41 is a cylindrical container made of quartz glass having good heat resistance, and a lower flange portion 37 seated on the plate spring 39 of the electric furnace 3 is projected in the circumferential direction on the upper edge surface. have. The container 41 is provided with a cylindrical sample tube 55 for charging the radioactive TeO ₂ sample, and the sample tube 55 can be more easily fixed to the center of the lower distillation vessel 41. In order to ensure that the bottom of the funnel shape of the funnel 51, the container 41 is pre-installed.

The upper distillation vessel 45, which is covered in a line aligned with the upper portion of the lower distillation vessel 41, is a cylindrical container made of quartz glass having the same diameter as the lower vessel 41, and has a lower flange portion at the bottom edge. An upper flange portion 43 contacting the 37 is formed to protrude in the circumferential direction, and is connected to the I-131 collector 17 through an insertion hole 47 formed through the bell-shaped upper surface center. 15 is inserted so that the enlarged diameter portion 49 is positioned inside the upper container 45. In addition, an induction pipe 57 for supplying oxygen from the oxygen gas cylinder 59 to the distillation vessel 11 is formed at one side of the insertion hole 47.

At this time, the lower flange portion 37 of the lower container 41 and the upper flange portion 43 of the upper container 45 are contacted in a sealed state because the contact surface is polished with an abrasive in advance, and distilled through the contact surface. ^In order to prevent leakage of ¹³¹ I ₂ gas, the lower edge portion 59 of the enlarged diameter portion 49 is positioned below the contact surface, and the upper edge portion 56 of the sample tube 55 is the enlarged diameter portion 49. It extends upwards to be at or above the same height as the bottom edge 59 of.

In addition, the distillation vessel 11 is in communication with the I-131 collector 17 by a connecting conduit 15 extending from the enlarged diameter portion 49, the connecting conduit 15 is a heating band 12 wound on the outer peripheral surface Heating to prevent ¹³¹ I ₂ from adsorbing on the inner wall of the connecting conduit 15. The I-131 collector 17 connected to the distillation vessel 11 is a cylindrical container in which a shaft diameter portion 71 is formed at the lower portion thereof, and the collection solution 201 is contained therein, and the connection conduit 15 is disposed therein. by reaction with ¹³¹ I ₂ gas flowing through is adapted to collect the I-131 by chemical treatment so that the Na ¹³¹ I solution. The collector 17 also has a hemispherical inlet 63 into which the shaft portion 61 of the connecting conduit 15 is inserted, in the center of the upper end, and two branch pipes, one on each side of the inlet 63. (65,67) are protruded.

A waste gas collector 21 is connected to the branch pipe 65 through a branch pipe 19, and a discharge container 23 and a solution input container 27 are connected to the branch pipe 67 through a branch pipe 20. have. Thus, ¹³¹ I ₂ gas, waste gas and reaction liquid flow in and out through the inlet 63 and the branch pipes 65 and 67 of the collector 17, so as to prevent leakage, the hemispherical stopper 69 and the respective branch pipes. The portions where 19 and 20 are fitted into the inlet 63 and the branch pipes 65 and 67 are in contact with each other by a polished ball socket joint type. In addition, the branch pipe 20 was extended to the end portion 62 of the shaft portion 61 of the connecting conduit 15 extending into the collector 17 to facilitate the suction of the reaction solution. In addition, the shaft diameter portion 71 of the I-131 collector 17, as shown in Figure 4, is surrounded by a coolant container 73 on the outer peripheral surface to cool the collector 17, thereby increasing the I-131 collection rate, collecting Since the capacity of the solution can be minimized, the specific radioactivity can be increased.

As such, the upper distillation vessel 45 and the collector 17 connected by the connecting conduit 15 are lifted by an automatic control method, and a sample tube 55 loaded with TeO ₂ is installed in the lower distillation vessel 41. In order to do so, the support 100 shown in FIG. 2 is inevitably required.

The support 100 is a case frame 101 to form an outer body, the upper end of the upper distillation vessel 45 and the fixing conduit 15 for holding the connection conduit 15 and the collector 17, the fixing portion 102 ) Is composed of a feed shaft 121 for conveying the support shaft, support shafts 123 and 125 for supporting the fixing part 102, and a driving motor 131 generating a rotational force of the feed shaft 121.

Here, an electric furnace 3 is provided at the center of the base 104 of the case frame 101, and is rotatable to the frame 101 by upper and lower shaft supports 133 and 135 at the rear of the electric furnace 3. The supported feed shaft 121 extends in the longitudinal direction, and the support shafts 123 and 125 extend in the longitudinal direction on both sides of the feed shaft 121, respectively.

In addition, the fixing part 102 has a female threaded hole 105 coupled to the feed shaft 121 at the center thereof, and through holes 107 and 109 to which the support shafts 123 and 125 are fitted, respectively, on both sides of the female threaded hole 105. The body is composed of a fixed frame 103 of the flat form provided through the end. A transverse clamper 111 is attached to the front of the fixing frame 103 to grip the connecting conduit 15, and the connecting rods 113 and 115 are downwardly positioned at the front side of the through holes 107 and 109 of the transverse clamper 111. Longitudinal clampers 117 and 119 attached to the ends of the connecting rods 113 and 115 are held to grip the upper portion of the upper distillation vessel 45 and the I-131 collector 17.

Therefore, when the driving motor 131 mounted on one side of the base 104 is driven, the feed shaft 121 receives the rotational force through the pulley 127 at the lower end of the transmission belt 129 and the feed shaft 121. Accordingly, the fixing frame 103 of the fixing part 102 coupled to interlock with the feed shaft 121 by the female thread hole 105 is guided to the support shafts 123 and 125 so as to move up and down to the electric furnace 3. The upper distillation vessel 45, the collector 17 and the connecting conduit 15 can be moved up and down at the same time from the distillation vessel 11 mounted on the.

Referring back to FIG. 1, the plurality of waste gas collectors 21 connected by the collector 17 and the branch pipes 19 have the branch pipes 19 inserted into the collectors 21 like the general distillation apparatus. A stopper 24 is fitted into the inlet 22 of the collector 21, a branch pipe 26 protrudes from the upper wall, and the waste gas collecting solution 203 is contained like the I-131 collector 17. Thus, the outside of the I-131 collector (17) and the waste ¹³¹ I ₂ gas outlet is not collected pass through the waste gas collector (21) is a plurality of the array, so the reaction with NaOH solution and repeatedly with radioactive ¹³¹ I ₂ gas in Leakage is prevented. In addition, an activated carbon tank 75 is connected to the collector 21 positioned at the end to finally adsorb the residual waste gas that has not been removed while passing through these waste gas collectors 21.

In addition, the solution inlet container 27 connected to the collector 17 through the branch pipe 20 and the drawer conduit 81 is a glass cap of the cap combined with the air inlet and discharger such as a filler in the upper opening 77 (79) is fitted, and the Na ¹³¹ I solution contained in the collector 17 is aspirated or discharged by the intake / exhaust operation of a filler.

Then, the second T-coke valve 83 is mounted on the solution introduction container 27 side of the lead-out conduit 81 to control the opening and closing of the flow path connected to the carbon dioxide gas cylinder 85. In addition, a third T-coke valve 93 is provided at the side of the solution drawing container 97 of the drawing conduit 81 to control the communication between the drawing conduit 81 and the gas discharge pipe 95 and branches from the branch pipe 20. The solenoid valve 89 is mounted at the intersection of the gas supply pipe 91 and the gas discharge pipe 95 so as to control communication from the gas discharge pipe 95 to the outlet 87 or the gas supply pipe 91. Finally, the first T-coke valve 25 is mounted at a position where the lower portion of the solution withdrawal container 97 of the branch pipe 20 and the draw conduit 81 intersects with the solution takeoff container 97 from the collector 17. When the Na ¹³¹ I reaction solution is withdrawn or the collection solution is introduced, the flow path is appropriately determined in each case when the reaction solution is to be discharged through the solution withdrawal container 97 to the discharge container 23.

As mentioned above, the I-131 distillation apparatus 1 according to the present invention has the configuration as mentioned above, and is to be operated by the method described below.

As shown in FIG. 1, in order to practically produce I-131 by the I-131 distillation apparatus 1, first, the I-131 collector 17 and the waste gas collector 21 react with ¹³¹ I ₂ gas. The collection solution 201 must be introduced to allow the collection of I-131. Then, the already radioactive TeO ₂ is charged to the distillation vessel (11), at which time the loading of TeO ₂ in the radioactive shielding hot cell to prevent radiation exposure is shown in Figure 2 An automatic operation device such as 100 is used.

That is, by connecting the upper distillation vessel 45 fixed to each clamper (111, 117, 119) of the fixed frame 103 by rotating the feed shaft 121 by operating the drive motor 131 of the support 100 in the external control panel Lift the conduit 15 and collector 17. Then, the TeO ₂ loaded sample tube 55 is inserted into the holder 51 of the lower distillation vessel 41, and the fixing frame 103 is lowered again to transfer the upper distillation vessel 45 to the lower distillation vessel 45. Cover tightly. Then, the opening and closing valve 60 of the oxygen gas cylinder 59 is opened to check whether the gas generated in the I-131 collector 17 is constant, so that the sealed state of the distillation vessel 11, in particular, the upper flange portion 43 and It is confirmed whether airtightness is maintained at the contact surface of the lower flange portion 37 (S1).

When the distillation preparation is completed in this way, the main power supply 7 is turned on to supply electric power to the electric furnace 3 so that the TeO ₂ target in the distillation vessel 11 is heated to 760 ° C. to be distilled with ¹³¹ I ₂ gas. do. At the same time, the heating band 12 is also heated to 300 ° C. so that the ¹³¹ I ₂ gas is not cooled due to the outside temperature, and the open / close valve 60 of the oxygen gas cylinder 59 is opened to allow the oxygen gas to open the induction pipe 57. By supplying through the ¹³¹ I ₂ gas to be able to smoothly exit the distillation vessel (11). In this way, when the distillation proceeds by the set time, the power is automatically turned off to end the distillation (S2).

In the next step, the distilled ¹³¹ I ₂ gas is collected in the collector 17. The ¹³¹ I ₂ gas introduced into the collector 17 through the connection conduit 15 is NaOH, which is a collecting solution 201 in the collector 17. Reaction with the solution is collected in the state of Na ¹³¹ I solution (S3).

At this time, a small amount of ¹³¹ I ₂ waste gas discharged without being collected in the collecting solution 201 flows into the plurality of waste gas collectors 21 through the branch pipe 19, and then repeatedly reacts to the waste gas collecting solution 203 again. It is removed in a trace amount of Na ¹³¹ I state, and finally completely removed by being adsorbed to the activated carbon 205 charged in the activated carbon tank 75 connected to the end of the collector 21.

Since the reaction solution such as Na ¹³¹ I generated in the collecting step (S3) is alkaline, the pH of the solution is adjusted to an appropriate level. First, the second T-coke valve 83 is adjusted to take out the carbon dioxide gas cylinder 85 and withdrawal. The conduit 81 is communicated, and then the third T-coke valve 93 is adjusted so that the outlet conduit 81 and the gas discharge pipe 95 communicate with each other, and then the on / off valve 90 of the carbon dioxide gas cylinder 85 is opened. After opening, the carbon dioxide gas was introduced into the outlet conduit 81, and then the solenoid valve 89 was closed so that the carbon dioxide gas via the gas discharge pipe 95 and the gas supply pipe 91 was fixed in the Na ¹³¹ I solution of the collector 17. The pH is adjusted to 8-9 while melting. When the pH of the reaction solution is adjusted to an appropriate level, the supply and shutoff valve 90 is closed to stop supply of carbon dioxide gas, and the solenoid valve 89 is opened to discharge residual carbon dioxide gas to the outside through the outlet 87. (S5).

When the pH of the Na ¹³¹ I reaction solution is adjusted in this way, the reaction solution is transferred to the take-out container 23. First, the second T-coke valve 83 is adjusted to move the reaction solution to the solution take-out container 97. The solution draw vessel 97 and the draw conduit 81 communicate with each other, and the third T-coke valve 93 is adjusted to communicate the draw conduit 81 with the solution draw vessel 97 and then the first T-coke valve 25 ) To communicate the solution extraction vessel (97) and the branch pipe (20). Then, the Na ¹³¹ I solution in the collector 17 is transferred to the branch pipe 20 and the solution extraction container 97 by the suction force of the filler connected to the glass tube 79. Once the transfer is finished, the first T-coke valve 25 is adjusted so that the solution takeout container 97 and the takeout container 23 communicate with each other, and then pressurized with a filler to carry out Na ¹³¹ I in the solution takeout container 97. The solution is to be introduced into the carrying out container (23) (S6).

Finally, by disruption in a distillation stage (S2), and evaporated to ¹³¹ I ₂ gas to keep the rest of TeO ₂ in a separate storage container is a closed TeO ₂ to process solid waste (S7).

The Na ¹³¹ I reaction solution thus produced is immersed in an export container and then dispensed into a radiation shielded dispenser for practical application. When I-131 is produced by such a dry distillation apparatus and a distillation method, The radioactivity can be obtained to increase the yield of labeling synthesis and to manufacture capsules, and to eliminate the need for additional reagents other than the collection solution. As a result, the treatment and operation can be simplified, making dry distillation easier. In addition, the time taken for distillation and separation is significantly shortened, and the tightness of each connection site is maintained to a high degree so as to prevent radiation exposure which may occur due to the leakage of radioactive material.

While the invention has been shown and described with respect to particular embodiments, it will be understood by those skilled in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the appended claims. Anyone can grow up easily.

Claims (17)

An electric furnace (3) having a temperature control device (5) and a power supply (7), and inserted into a central through hole (9) of the electric furnace (3) with a TeO ₂ target (13) loaded therein. The I-131 collector 17, the connecting branch 19, which is in communication with the distillation vessel 11 through a connecting conduit 15 in which the distillation vessel 11 and the heating band 12 are wound. A plurality of waste gas collectors 21 in communication with the -131 collector 17, and a solution injection container connected between the I-131 collector 17 and the discharge vessel 23 through a first T-coke valve 25. I-131 dry distillation apparatus characterized by consisting of (27). According to claim 1, wherein the electric furnace 3 has a case 29 forming an outer body, the through-hole 9 is formed in a cylindrical shape so that the distillation vessel 11 can be inserted into the center of the case 29 The heat transfer body 31 is wound on the outer circumferential surface of the heat transfer body 31, the upper end of which is wound more than the bottom to compensate for heat emitted from the outside, that is, upward direction. And a heat insulator 33 mounted in close contact with the distillation vessel 11 above, a temperature sensor 35 penetrating the heat insulator and measuring the internal temperature of the heat transfer element 31, and the distillation. I-131 dry type, characterized in that it consists of a plate-shaped spring 39 which is fitted around the vessel 11 and installed on the upper surface of the case 29 so as to support the lower flange portion 37 of the distillation vessel 11. Distillation apparatus. The cylindrical lower portion of claim 1, wherein the distillation vessel (11) is inserted into the through hole (9) of the electric furnace (3) and the fixing lower flange portion (37) protrudes in the circumferential direction at an upper end thereof. The upper distillation vessel 45 which is covered in a line with the distillation vessel 41 and the lower distillation vessel 41 and in contact with the lower flange portion 37 is formed to protrude in the circumferential direction at the bottom thereof. ), A connecting conduit 15 into which an enlarged diameter portion 49 is inserted into the upper distillation vessel 45 through a pipe insertion hole 47 formed at an upper end of the upper distillation vessel 45, and the lower distillation vessel ( 41, a bottom-shaped funnel-shaped holder 51 positioned at the bottom of the sample tube, and a sample tube 55 inserted into and fixed to the shaft diameter portion 53 of the holder 51 to load a TeO ₂ sample therein. I-131 dry distillation apparatus, characterized in that consisting of. According to claim 1 or 3, wherein the upper surface of the upper distillation vessel 45 of the distillation vessel 11 is connected to the oxygen gas cylinder 59 for supplying oxygen through the induction pipe (57). I-131 dry distillation apparatus characterized by the above. 4. The enlarged diameter portion (49) of the connecting conduit (15) is characterized in that the lower edge portion (59) has an upper flange portion (43) of the upper distillation vessel (45) and the lower distillation vessel (41). I-131 dry distillation apparatus, characterized in that the lower flange portion (37) of the lower surface than the polishing surface 61 in contact with. 4. The dry distillation apparatus according to claim 3, wherein the sample tube (55) extends to a height equal to or greater than the bottom edge portion (59) of the enlarged diameter portion (49). According to claim 1, wherein the I-131 collector 17 has a hemispherical inlet (63) is inserted into the shaft diameter portion 61 of the connecting conduit 15 in the center of the upper end, I-131 dry distillation apparatus, characterized in that the two branch pipes (63, 65) are formed on each side protruding, the cylindrical vessel of which the diameter of the lower part of the body is reduced. The branch pipe (19) for connecting the waste gas collector (21) to the I-131 collector (17) and the branch pipe (20) for connecting the discharge container (23) to the I-131 collector (17). The parts joined to the engines 65 and 67 and the parts joined to the connecting conduits 15 and to which the stoppers 69 which are arranged to close the inlet 63 of the collector 17 are joined by the polished contact surfaces, respectively. I-131 dry distillation apparatus, characterized in that coupled to the ball socket joint. The cooling water container (73) according to any one of claims 1 to 7, characterized in that a cooling water container (73) is attached to the outside of the shaft portion (71) of the I-131 collector (17) to cool the shaft portion (71). I-131 Dry Distillation Unit. The I-131 dry distillation apparatus according to claim 1, wherein the plurality of waste gas collectors (21) further include an activated carbon tank (75) connected to the last stage. According to claim 1, wherein the solution input container 27 is fitted with a stopper glass tube 79 connected to the air intake and discharge in the upper opening 77, the lead-out conduit 81 is connected to the carrying out container (23) A carbon dioxide gas cylinder 85 for supplying carbon dioxide gas through a second T-coke valve 83 is connected to the solution injection container 27 of the I-131 collector 17 and the discharge container 23. The gas supply pipe 91 branching from the branch pipe 20 therebetween is branched from the draw conduit 81 through the third T-coke valve 93 through the solenoid valve 89. I-131 dry distillation apparatus, characterized in that connected to the outlet (87) side. 4. The upper distillation vessel 45 and the upper distillation vessel 45 of any one of claims 1 to 3, wherein the upper distillation vessel 45 and the upper distillation vessel 45 of the distillation vessel 11 are inserted into the through-holes 9 of the electric furnace 3. In order to simultaneously lift the I-131 collector 17 connected by the connecting conduit 15, the case frame 101 and the upper distillation vessel 45 having an outer shape to install the electric furnace 3 are provided. A fixing portion 102 for holding the upper end of the connection conduit 15 and the collector 17, a conveying shaft extending in the longitudinal direction in the case frame 101 for conveying the fixing portion 102 ( 121, support shafts 123 and 125 extending in the longitudinal direction on both sides of the feed shaft 121 to support the fixing part 102, and pulleys 127 attached to the lower ends of the feed shaft 121. It is composed of a drive motor 131 for transmitting a rotational force to the feed shaft 121 by a transmission belt 129 wound on the I-131 dry distillation unit, characterized in that further includes a support 100. The fixed part 103 of claim 12, wherein the fixing part 102 has a female threaded hole 105 at a center thereof and a through hole 107, 109 penetrated at both ends of the female threaded hole 105. In order to grip the connection conduit 15, to hold the transverse clamper 111 attached to the front of the fixed frame 103, and the upper distillation vessel 45 and the I-131 collector 17 I-131 dry distillation apparatus comprising a longitudinal clamper (117,119) attached to the connecting rods (113,115) protruding downward in front of the through holes (107,109) on both sides of the horizontal clamper (111) of the fixed frame (103). The collecting solvent 201 was introduced into the I-131 collector 17, charged with a TeO ₂ crushed piece 13 spun into the sample tube 55 of the distillation vessel 11 as a target, followed by an oxygen gas cylinder (59). I-131 distillation preparation step (S1) to check the sealing state of the distillation vessel 11 by confirming whether the gas generated in the I-131 collector 17 by opening and closing the valve (60) of; Supplying power to the electric furnace (3) from the main power supply (7) and heating the heating band (12) to reach the internal temperature of the distillation vessel (11) up to 760 ℃ while distilling TeO ₂ while the on-off valve A distillation step (S2) of discharging the oxygen by supplying oxygen gas and then turning off the power automatically when the distillation progresses by a set time; A collecting step (S3) of collecting the ¹³¹ I ₂ gas generated in the distillation step (S2) into the collecting solution 201 of the collector 17; PH adjusting step (S5) of adjusting the pH of the reaction solution to 8 to 9 by adding carbon dioxide to the reaction solution in the collector ¹³¹ I ₂ is reacted in the collecting step (S3) for a predetermined time (S5); I-131 export step (S6) for transporting the reaction solution with the pH adjusted in the pH control step (S5) to the export container (23) using a solution extraction device (97); I-131 dry distillation, characterized in that consisting of; in the distillation stage (S2) ¹³¹ I ₂ gas after distillation residual TeO ₂ the waste TeO ₂ treatment step (S7) to collapse and stored in a separate storage container. 15. The method of claim 14, wherein the ¹³¹ I ₂ waste gas discharged without reacting with the solvent 201 in the collecting step (S3) to pass through the plurality of waste gas collector 21 to the collecting solution 203 of the collector 21 And by adsorbing the activated carbon 205 loaded into the activated carbon tank 75 so as to finally remove the waste gas passing through the collector 21 at the end of the plurality of collectors 21. I-131 dry distillation method. The method according to claim 14, wherein in order to introduce the carbon dioxide gas into the collector 17 in the pH adjusting step (S5), the second T-coke valve 83 is first adjusted to communicate the carbon dioxide gas cylinder 85 and the lead-out conduit 81. The third T-coke valve 93 is adjusted to communicate the outlet conduit 81 and the gas discharge pipe 95, and the solenoid valve 89 is closed for a predetermined time so that the carbon dioxide gas discharged from the gas cylinder 85 is discharged. After reacting with the collection solution 21 in the collector 17 for a predetermined time, the shutoff valve 90 is closed to stop the supply of carbon dioxide gas, and the solenoid valve 89 is opened to discharge the outlet 87. I-131 dry distillation method, characterized in that to discharge residual carbon dioxide gas through. 15. The method according to claim 14, wherein in order to transfer the reaction liquid in the collector 17 to the discharge container 23 in the I-131 take-out step S6, the second T-coke valve 83 is first adjusted. 27) and the draw conduit 81 is communicated, the third T-coke valve 93 is adjusted to communicate the draw conduit 81 and the solution draw container 97, and the first T-coke valve 25 is adjusted to The solution extraction vessel 97 and the branch tube 20 are in communication so that the reaction liquid in the collector 17 is drawn out to the solution extraction vessel 97 by the suction force of the air suction and discharge vessel connected to the glass tube 79. After adjusting the first T-coke valve 25 again so that the solution extraction container 97 and the delivery container 23 communicate with each other, the solution extraction container 97 is operated by the pressing force generated by the air intake and discharge container. I-131 dry distillation method, characterized in that to be introduced into the carrying out container (23).