KR101310106B1 - Equipment and method for the removal of adhered salt from uranium deposits by a vacuum distiller with a forced cooling system - Google Patents

Abstract

PURPOSE: A uranium electrodeposit salt removing apparatus, and an operating method thereof are provided to reduce use of energy by opening a heating jacket in the finishing part of cooling. CONSTITUTION: A vacuum distillation tower (8) separates salt contained in electrodeposit. A heating jacket (4) comprises a heater (5) for rising the operation temperature. A cooling channel (19) is installed between the heating jacket and the exterior wall of the vacuum distillation tower. The cooling channel lowers the inside temperature of the vacuum distillation tower by flowing a refrigerant. A gas cooler (1) cools the high temperature refrigerant discharged from the cooling channel.

Description

Uranium electrodeposition salt removal device with forced cooling function and its operation method {EQUIPMENT AND METHOD FOR THE REMOVAL OF ADHERED SALT FROM URANIUM DEPOSITS BY A VACUUM DISTILLER WITH A FORCED COOLING SYSTEM}

The present invention relates to an apparatus for removing uranium deposit salt having a forced cooling function and a method of operating the same. More specifically, the present invention relates to a uranium electrodeposited salt removing device and a method of operating the same. The present invention relates to a uranium electrodeposited salt removing device having a forced cooling function for cooling and opening a heating jacket to perform natural cooling, and a method of operating the same.

Korea operates a total of 23 nuclear power plants, including four heavy water reactors (CANDU) and 19 pressurized water reactors (PWRs), and the spent nuclear fuel they discharge is over hundreds of tons every year. It is stored in the tank installed in Gori, Wolseong. In the meantime, the capacity has been expanded several times by repeating the reracking operation, but due to the risk of heat generation, it cannot be infinitely densified. Therefore, securing the land and methods for permanently disposing of spent fuel is an urgent task that can no longer be postponed.

 Recovering long-lived nuclides of spent nuclear fuel and recycling them to reactor fuels such as high-speed reactors can reduce the amount of waste, saving space in high-level waste disposal sites and reducing the management period from more than a few decades to hundreds of years. The Pyro process has the advantage of high nuclear proliferation resistance and relatively simple process due to the recovery of plutonium, uranium and other ultra-uranic elements (Np, Am, Cm) together, and in many countries in the US, Japan and Europe. It is actively researching and developing.

Pyroprocess developed by the present applicant is a process for recovering uranium and ultra uranium elements electrochemically at high temperature using LiCl-KCl eutectic salt as an electrolyte. The main processes of Pyroprocess are metal oxide ingots or granules obtained after reducing the spent fuel in the oxide state by the electrolytic reduction process, and the solid cathode is used to make up more than 90% of the spent fuel by using a solid cathode. Uranium is separated by electrolytic refining process. After the uranium removal operation, the remaining uranium and TRU elements among the elements dissolved in the eutectic salt are recovered in the liquid cathode.

In the electrolytic refining process, dendritic uranium is electrodeposited on the solid cathode, and when it is separated from the molten salt, a large amount of salt is contained in the uranium electrodeposited material. Since uranium deposits are small dendritic particles, they are stored in an ingot and the salts contained must be separated for this purpose. In general, salts are separated by vacuum distillation, but salt distillation, which accounts for 20 wt% or more, requires long time operation at high temperature.

 The apparatus for removing eutectic salts from uranium electrodeposits is also called Cathode Processor, and separates uranium electrodeposits and eutectic salts using the principle of vacuum distillation, which is usually a physical method. In general, Cathode Processor puts uranium electrodeposition on the top of the tower and heats it by using an induction heating heater installed outside, and condenses and recovers the evaporated eutectic salt by placing a eutectic salt recovery crucible on the lower condensation part cooled by air cooling. The unit is operated batchwise, and the entire amount of eutectic salts is vacuum distilled to consume a large amount of heat, and in order to increase the processing speed per unit time, the evaporation cross-section must be large or must be operated at high temperatures where the vapor pressure of the eutectic salts is high. However, this method requires a material of a structural material that withstands high temperatures because it is operated at high temperatures, and there is a problem in that manufacturing costs are also high.

The present invention is to solve the above problems, the present invention wraps the outside of the vacuum distillation tower with a heating jacket, by placing a cooling flow path between the heating jacket and the vacuum distillation tower to perform the first cooling, opening the heating jacket natural cooling The present invention relates to a uranium electrodeposited salt removing device having a forced cooling function and a method of operating the same.

In order to achieve the above object, vacuum distillation column for separating the salt contained in the uranium electrodeposits generated in the electrorefining process of the pyroprocess; A heating jacket surrounding the vacuum distillation tower and including a heater for raising the operation temperature for vacuum distillation; And a cooling passage existing between the heating jacket and the outer wall of the vacuum distillation tower to lower the internal temperature of the vacuum distillation tower by flowing a refrigerant therein after the evaporation of the salt is completed, wherein the vacuum distillation tower lowers the first temperature by the cooling passage. The present invention provides a uranium electrodeposited salt removing device having a forced cooling function, wherein the heating jacket is naturally cooled by opening the vacuum distillation column in the vertical direction or the horizontal direction.

The apparatus may further include a gas cooler for cooling the high temperature refrigerant discharged from the cooling passage.

In addition, the heating jacket is characterized in that it further comprises a control device for controlling the opening degree of the heating jacket, when opened in the vertical or horizontal direction.

In addition, the heating jacket is characterized in that it further comprises a blower for cooling so that the vacuum distillation column is in good contact with the outside air when the heating jacket is opened in the vertical direction.

The present invention comprises the steps of putting a uranium electrodeposited salt containing uranium electrodeposition crucible in the uranium electrodeposition crucible, and mounting the uranium electrodeposition crucible on top of the heat sink in the vacuum distillation column (step S1); After the step S1, by operating a vacuum pump to vacuum the inside of the vacuum distillation column, and operating the heater to raise the temperature to 800 ~ 900 ℃ to remove salt from the uranium electrodeposition by vacuum distillation (step S2); After the step S2, when the evaporation of the salt is completed, the step of performing a one-step cooling to lower the internal temperature of the vacuum distillation tower to 450 ~ 550 ℃ by flowing a refrigerant into the cooling oil (S3 step); After the step S3, if the internal temperature is lowered to stop the supply of the refrigerant and performs a two-step cooling to open the heating jacket (4) in the vertical or horizontal direction to allow natural cooling (step S4); After the step S4, if the internal temperature of the vacuum distillation tower is room temperature, the step of desorbing the uranium electrodeposition crucible and the recovered salt container (step S5); It provides a method of operating the uranium electrode salt removal device.

In addition, the refrigerant flowing into the cooling passage in step S3 is characterized in that the air or argon gas.

In addition, the cooling jacket in the step S4 is characterized by cooling the vacuum distillation tower by arranging a cooling blower on the lower side of the vacuum distillation tower when natural cooling by opening the heating jacket in the vertical or horizontal direction.

In addition, without using a method of flowing the refrigerant to the cooling flow path in the step S3, it is characterized in that the cooling while opening the heating jacket step by step from the beginning.

The uranium electrodeposited salt removing device and its operation method having the forced cooling function have a waiting time for cooling to replace the electrodeposited crucible and recovered salt container after vacuum distillation operation than the conventional vacuum distillation device using the natural cooling method. It is shortened to improve the performance of the inflammatory device.

In addition, the uranium electrodeposited salt removing device with a forced cooling function according to the present invention is more suitable for the installation and desorption of uranium electrodeposited crucibles and salt collection vessels during batch operation than conventional uranium electrodeposited salt removing devices that naturally cool vacuum distillation towers. The cooling time of the distillation column required for this purpose is reduced, thereby increasing the overall salt removal rate.

In addition, the uranium electrodeposited salt removing device equipped with a forced cooling function according to the present invention, after the vacuum distillation is finished, the refrigerant is introduced into the heating jacket after cooling to a predetermined temperature, and then the heating jacket is opened in a vertical direction or a left or right direction. Binarization was by additional cooling. Therefore, it has the advantage of preventing the cracking of material due to quenching during the initial cooling at high temperature and preventing the heat release when the heating jacket is opened, and saves energy by opening the heating jacket in the latter part of cooling rather than continuously flowing the fluid. .

1 is a schematic diagram showing a process of cooling by using a refrigerant of the uranium electrodeposition salt removal device having a forced cooling function according to the present invention,
Figure 2 is a schematic diagram showing a process of opening and cooling the heating jacket of the uranium electrodeposition salt removal device having a forced cooling function according to the present invention.
Figure 3 shows a flow chart of the operating method of the uranium electrodeposit salt removal device having a forced cooling function according to the present invention.

Hereinafter, with the forced cooling function according to the present invention with reference to the accompanying drawings Preferred embodiments of the uranium electrode salt removal device and its operating method will be described in detail. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In the distillation column, a vibrating strainer was used to separate the eutectic salts in the uranium electrodeposits in a liquid state, and to further separate the unseparated eutectic salts by vacuum distillation (SWKwon et al., J. Radioanal. Nucl. Chem., 288, 789 (2011)). This method can shorten the operating time for salt removal by removing a significant amount of eutectic salts by solid-liquid separation at low temperatures, and per-hour in vacuum distillation process because the solid-liquid separation of a significant amount of salt prior to vacuum distillation. The burden on salt evaporation rate is reduced. Therefore, it is possible to lower the operating temperature of the vacuum distillation process, which has the advantage of not using ultra-high temperature materials. Salt-liquid separation systems of solid-liquid separation-vacuum distillation are useful when the salt content in the uranium electrodeposit is high, and when the content is low, the solid-liquid separation does not occur much.

The processing speed of the uranium electrodeposited inflammatory device should be on the scale corresponding to the processing speed of the electrolytic refining device. In particular, the research on the high performance of the electrolytic refining device, which is the core of the pyro process, has been carried out. The speed of processing should also be improved. For this purpose, the rate of vacuum distillation should be fast, but similarly the cooling time of the vacuum distillation tower should be shortened for the desorption of electrodeposit crucibles between operation batches.

The inventors of the present invention were studying a method for removing eutectic salts from uranium deposits of a solid cathode in a process of recovering actinium elements from spent nuclear fuel using a pyroprocess, and removing uranium electrodeposition salts having a forced cooling function. The device was developed.

Uranium electrode salt salt removal device with a forced cooling function according to the present invention for efficiently separating the salt contained in the uranium electrodeposits and its operating method is first heated to prevent excessive quenching at high temperature and to save cooling energy when reaching a certain temperature Cooling fluid is injected between jackets to a certain temperature, and heating jacket is opened up and down or left and right to provide a two-stage cooling method that speeds up salt separation from uranium deposits. Do it.

The apparatus of the present invention has a forced cooling function, so that the cooling time of the distillation tower required for the installation and desorption of the uranium electrodeposition crucible and the salt recovery container during the batch operation is reduced, compared to the existing uranium electrodeposition salt removing device that naturally cools the distillation column. Removal speeds up. In addition, the uranium electrodeposited salt removal device with forced cooling function adds a coolant to the cooling flow path between heating jackets after the vacuum distillation and cools it to a certain temperature, and then opens the heating jacket in a vertical direction. Binary by cooling. Therefore, it has the advantage of preventing the cracking of material due to quenching during the initial cooling at high temperature and preventing the heat release when the heating jacket is opened, and saves energy by opening the heating jacket in the latter part of the cooling rather than continuously flowing the fluid. .

The processing speed of the uranium electrodeposited inflammatory device should be on the scale corresponding to the processing speed of the electrolytic refining device. In particular, the research on the high performance of the electrolytic refining device, which is the core of the pyro process, has been carried out. The speed of processing should also be improved. Factors affecting the treatment speed include the increase of the distillation rate per unit time or the separation of some salts in the liquid state before distillation, and after completion of the operation, the replacement of the uranium electrode crucible and the recovery salt container is necessary. The distillation column must be cooled to replace the electrodeposition crucibles and recovery salt vessels, usually using a passive method of shutting off the supply of heater power.

The simplest way to speed up the cooling of the distillation column is to open the heating jacket installed outside the distillation column, but after operating at about 900 ° C, direct contact between the surface of the hot distillation column and the atmosphere outside can cause cracks in the distillation column. In the initial stage of cooling, the cooling rate is too fast. In addition, considering that the distillation unit is usually installed inside the argon cell, the hot heat is discharged to the outside to affect the surrounding device, or the temperature of the argon cell rises temporarily to impose a burden on the argon cell cooling system. do. As another method of cooling the distillation column, the cooling rate may be controlled by adjusting the flow rate by allowing the fluid to flow between the outside of the vacuum distillation column and the heating jacket. In addition, in the step of opening the heating jacket, which is the second cooling method, the cooling rate may be controlled by controlling the opening degree of the heating jacket or by installing a blower outside the device to make contact with the outside air well.

Efficient separation of the salts contained in the uranium deposits according to the present invention can be carried out by the uranium deposit salt removal device having the forced cooling function shown in FIGS. 1 and 2.

1 is a schematic diagram illustrating a process of cooling by using a refrigerant of an uranium electrodeposited salt removing device having a forced cooling function, and the refrigerant may be gas such as air or argon, if necessary. Vacuum distillation column; Lower flange; heater; It consists of a refrigerant supply device, a vacuum pump for vacuum distillation, and a cooling flow path.

Figure 2 is a schematic diagram showing a process of opening and cooling the heating jacket of the uranium electrodeposition salt removal device having a forced cooling function.

 The uranium deposit containing the eutectic salt in the crucible 6 of the uranium electrodeposited salt removing device is mounted on the vacuum distillation tower 8 and is heated at a temperature higher than the melting point of the eutectic salt using the heater 5 and is a vacuum distillation operation condition. Raise to about 800-900 ° C. In addition, the vacuum pump 13 is operated to bring the vacuum distillation tower 8 into a vacuum condition. The vaporized gaseous eutectic salt is condensed in the recovery salt vessel 20 installed on the flange 14 at the bottom of the vacuum distillation tower 8, and the cooling water flows inside the flange 14 for efficient recovery. The coolant enters the flange coolant inlet 15 and exits to the coolant outlet 16. After a certain time (about 2 hours) is maintained to sufficiently evaporate the eutectic salt from the uranium electrodeposits, the distillation operation is completed, and the outside of the vacuum distillation tower 8 is forcedly cooled to shorten the time required for cooling.

Forced cooling is initially high temperature of 800-900 ℃, opening the heating jacket (4) may damage the metal constituting the vacuum distillation tower (8) by contacting the outside cold gas, repeatedly increasing the temperature and rapid cooling Deformation or cracking may occur. In addition, high temperature heat is radiated to the outside, which may damage surrounding devices. Therefore, in the initial stage of cooling, the coolant is gradually cooled by supplying the refrigerant to the cooling channel 19 between the heating jacket 4 and the outer wall of the vacuum distillation tower 8. At this time, a gas cooler 1 is provided at the outlet of the cooling passage 19 to cool the hot refrigerant to some extent and then discharge it. The gas cooler 1 discharges a high-temperature refrigerant discharged to the outlet of the cooling channel 19 while injecting a separate refrigerant into the gas cooler cooling water inlet 2 and discharging it to the gas cooler cooling water outlet 3. The gas cooler (1) is discharged after cooling the high-temperature refrigerant to be able to protect the surrounding devices.

The refrigerant is supplied to the cooling passage 19 by connecting the cooling gas cylinder 12 to the cooling gas tube 11, and the refrigerant flowing into the cooling passage 19 may be air or argon gas. Refrigerant may also be used. If the temperature of the vacuum distillation tower 8 drops sufficiently (approximately 450 ° C. to 550 ° C.), since the cooling rate must be increased at this time, the amount of the refrigerant must be increased to stop the supply of the refrigerant to save the refrigerant, and the heating jacket 4 To increase the cooling rate. 2 shows an embodiment in which the heating jacket 4 is opened in the left and right directions of the vacuum distillation tower 8.

When opening the heating jacket 4 for cooling, the cooling rate is accelerated by blowing the gas around the vacuum distillation tower in a large area using the cooling blower 18. In order to open the heating jacket 4 to the left or right or up and down direction, a separate control device (not shown) may be provided. When the control device opens too much a portion initially when opening the heating jacket 4, Since cracks may occur in the vacuum distillation tower 8, it is necessary to adjust the degree of opening.

When the cooling of the vacuum distillation tower 8 is completed and the room temperature is reached, the uranium electrodeposited crucible 6 from which the salt is removed is recovered and a new crucible is mounted. Then, the recovered salt container 20 containing the recovered salt 17 may be taken out to remove the salt, and the recovered salt container 20 may be mounted again, or a new recovered salt container 20 may be installed. Depending on the amount of salt 17 recovered, the recovered salt vessel 20 may continue to be used or may be exchanged with the uranium electrodeposition crucible 6.

The vacuum distillation tower 8 corresponds to an upper portion of the evaporation region and a lower portion of the heat sink 10. A flange 14 is disposed at a lower portion corresponding to the bottom, and a lower cooling coil of the flange 14 may be installed, and a flange cooling water inlet 15 and a flange cooling water outlet 16 are disposed to allow the cooling water to flow. . When a vacuum apparatus is required to make the interior of the vacuum distillation tower 8 into a vacuum condition, the vacuum apparatus is composed of a filter and a vacuum pump 13.

The heat sink 10 serves to distinguish the upper part from the lower part, and maintains a high temperature so that the salt evaporates well at the upper part, and the salt evaporated at the upper part moves from the lower flange 14 to the lower part. Separate the space so that condensation can take place well.

Hereinafter, with reference to Figure 3 will be described in detail the operating method of the uranium electrodeposited salt removing device having a forced cooling function according to the present invention.

Operation method of the uranium electrodeposited salt removing device having a forced cooling function is to put a uranium electrodeposited salt in the uranium electrodeposited crucible and to mount the crucible containing the uranium electrodeposited on the heat sink of the vacuum distillation tower ( Step S1); After the step S1, by operating a vacuum pump to vacuum the inside of the vacuum distillation column, and operating the heater to raise the temperature to 800 ~ 900 ℃ to remove salt from the uranium electrodeposition by vacuum distillation (step S2); After the step S2, when the evaporation of the salt is completed, the step of performing a one-step cooling to lower the internal temperature of the vacuum distillation tower to 450 ~ 550 ℃ by flowing a refrigerant into the cooling oil (S3 step); After the step S3, if the internal temperature is lowered, the step of performing a two-step cooling to stop the supply of the refrigerant and to open the heating jacket in the vertical direction or left and right to be natural cooling (step S4); And after the step S4, when the internal temperature of the vacuum distillation tower reaches room temperature, desorbing the uranium electrodeposit crucible and the recovered salt container (step S5).

First, the step S1 according to the present invention is a step of placing the uranium electrodeposited salt in the uranium chromium crucible and mounting the crucible containing the uranium electrodeposited on the heat sink in the vacuum distillation tower, that is, the evaporation region.

Next, the step S2 according to the present invention is a step of removing the salt by vacuum distillation from the uranium electrodeposition by operating the vacuum pump to make the inside of the vacuum distillation column under vacuum conditions after the step S1 is completed. At this time, the internal temperature of the vacuum distillation column is adjusted to 800-900 ° C., and the holding time is maintained at about 2 hours at the operating temperature. Increasing the temperature above 900 ℃ causes problems in the durability of the vacuum distillation column or increases the time for cooling the vacuum distillation column after removing the salt, which is not recommended for overall efficiency. The salt evaporated by vacuum distillation moves to the flange at the bottom of the heat sink, and condensation reaction occurs at the flange, and the salt accumulates in the recovered salt container. At this time, the cooling water flows to the lower part of the flange to make the condensation reaction better.

Next, the step S3 according to the present invention is a one-step cooling step of lowering the internal temperature of the vacuum distillation tower to about 450 to 550 ° C. after the evaporation of the salt after the step S2 is finished. Various kinds may be applied to the refrigerant flowing in the interior, and preferably air or argon gas is used.

Step S4 is a two-stage cooling step that stops the supply of the refrigerant when the internal temperature of the vibration distillation tower is lowered to some extent and opens a part of the heating jacket in left and right or up and down directions to allow natural cooling. At this time, the cooling rate may be adjusted by using a control device for controlling the opening degree of the heating jack. In addition, a method of lowering the internal temperature of the vacuum distillation column by using the second cooling step of step S4 may be omitted by omitting the first cooling step of step S3. In the case of the above method, the control of the cooling rate is an important variable.

Next, the step S5 according to the present invention is a step of desorbing the uranium electrodeposit crucible and the recovered salt container when the internal temperature of the vacuum distillation tower reaches room temperature after the step S4 is completed.

As described above, the operation method of the uranium electrodeposited salt removing device having the forced cooling function according to the present invention is that of the uranium electrodeposited crucible and the salt collection vessel during the batch operation than the conventional method of removing the uranium electrodeposited salt naturally cooling the vacuum distillation column. The cooling time of the vacuum distillation tower required for installation and desorption will be reduced, thereby increasing the overall salt removal rate.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1: gas cooler 2: gas cooler cooling water inlet
3: gas cooler cooling water outlet 4: heating jacket
5: heater 6: uranium electrodeposit crucible
7: uranium electrodeposited material 8: vacuum distillation tower
9: electrodeposition residue 10: heat sink
11: cooling gas tube 12: cooling gas spring
13: vacuum pump 14: flange
15: flange coolant inlet 16: flange coolant outlet
17: recovered salt 18: cooling blower
19: cooling passage 20: recovered salt container

Claims (8)

A vacuum distillation column (8) for separating the salts contained in the uranium electrodeposits generated in the electrorefining process of the pyroprocess;
A heating jacket 4 surrounding the vacuum distillation tower 8 and including a heater 5 for raising the operating temperature for vacuum distillation;
It is present between the heating jacket 4 and the outer wall of the vacuum distillation tower (8) and the cooling flow path (19) for lowering the internal temperature of the vacuum distillation tower (8) by flowing a refrigerant inside the evaporation of salt;
The vacuum distillation tower (8) is characterized in that the first cooling by the cooling flow path (19), after opening the heating jacket (4) in the vertical or horizontal direction of the vacuum distillation tower (8) for natural cooling. Uranium electrodeposition salt removal device with forced cooling function. The method of claim 1,
Uranium electrodeposited salt removing device having a forced cooling function further comprises a gas cooler (1) for cooling the high temperature refrigerant discharged from the cooling passage (19). The method of claim 1,
Uranium electrodeposition salt removal device having a forced cooling function, characterized in that it further comprises a control device for controlling the opening degree of the heating jacket (4) when the heating jacket (4) is opened in the vertical or horizontal direction. The method of claim 1,
When the heating jacket 4 is opened in the vertical or horizontal direction, the uranium having a forced cooling function further comprises a cooling blower 18 so that the vacuum distillation tower 8 is in good contact with the outside air. Electrodeposition salt removal device. Placing a uranium electrodeposited salt containing uranium electrodeposited crucible (6), and mounting the uranium electrodeposited crucible (6) on top of the heat sink (10) in the vacuum distillation tower (8);
After the step S1, the vacuum pump 13 is operated to vacuum the inside of the vacuum distillation tower 8, and the heater 5 is operated to raise the temperature to 800 to 900 DEG C. Removing (step S2);
After the step S2, when the evaporation of the salt is finished, the refrigerant flows into the cooling passage 19 to perform a one-step cooling to lower the internal temperature of the vacuum distillation tower 8 to 450 ~ 550 ℃ (step S3);
After the step S3, if the internal temperature is lowered to stop the supply of the refrigerant and performs a two-step cooling to open the heating jacket (4) in the vertical or horizontal direction to allow natural cooling (step S4); And
After the step S4, if the internal temperature of the vacuum distillation tower 8 is room temperature, the step of removing the uranium electrodeposit crucible 6 and the recovery salt container 20 (step S5); Operation Method of Uranium Electrode Salt Removal Device. The method of claim 5, wherein
In the step S3, the refrigerant flowing into the cooling passage 19 is provided with a forced cooling function, characterized in that the air or argon gas. Operation Method of Uranium Electrode Salt Removal Device. The method of claim 5, wherein
Cooling the vacuum distillation tower 8 by arranging the cooling blower 18 in the lower side of the side of the vacuum distillation tower 8 when natural cooling by opening the heating jacket (4) in the step S4 in the vertical or horizontal direction With forced cooling Operation Method of Uranium Electrode Salt Removal Device. The method of claim 5, wherein
In the step S3, without using a method of flowing the refrigerant to the cooling passage 19, with the forced cooling function characterized in that the cooling while opening the heating jacket (4) step by step from the beginning Operation Method of Uranium Electrode Salt Removal Device.

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