Radioactive material dissolving device

Abstract

The embodiment of the invention relates to the technical field of radioactive material transfer, in particular to a radioactive material dissolving device which comprises a dissolving system, a feeding system and a gas supply system. The dissolving system is arranged to dissolve radioactive materials; the feeding system is arranged to add feed liquid for dissolving radioactive materials into the dissolving system; the gas supply system is arranged to provide high-temperature mixed gas for the dissolving system so as to oxidize the radioactive materials; the dissolving system comprises a body used for dissolving radioactive materials, a heat dissipation piece connected with the body and a cover piece used for closing or opening the body, a sealing piece is formed between the cover piece and the heat dissipation piece, and the heat dissipation piece is arranged to be capable of diffusing heat of the body outwards. According to the radioactive material dissolving device provided by the embodiment of the invention, the temperature of the sealing piece can be reduced by utilizing the heat dissipation piece, and the situation that the service life of the sealing piece is remarkably shortened due to the fact that the temperature of the sealing piece is high due to introduction of high-temperature mixed gas is avoided.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of radioactive material transfer, and specifically to a radioactive material dissolving device. Background Art

[0002] The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] When transferring radioactive materials, the radioactive materials can be dissolved by using a dissolving system. The dissolving system generally includes a body forming a dissolving space, a cover body for closing or opening the body, and a sealing member is provided between the body and the cover body to achieve sealing between the two.

[0004] The inventor of the present application found that the seal disposed between the body and the cover is easily damaged after being used for a period of time. The inventor of the present application further found that the temperature of the seal is high due to the high-temperature mixed gas introduced into the body during dissolution, which significantly shortens the service life of the seal. Summary of the invention

[0005] A brief overview of the present application is provided below in order to provide a basic understanding of certain aspects of the present application. It should be understood that this overview is not an exhaustive overview of the present application. It is not intended to identify the key or important parts of the present application, nor is it intended to limit the scope of the present application. Its purpose is merely to present certain concepts in a simplified form as a prelude to a more detailed description discussed later.

[0006] In view of the above problems, an embodiment of the present application provides a radioactive material dissolution device, in which the radioactive material is collected on a radioactive sample plate, and the dissolution device may include a dissolution system, a feeding system, and a gas supply system. The dissolution system is configured to dissolve the radioactive material; the feeding system is configured to add liquid for dissolving the radioactive material into the dissolution system; the gas supply system is configured to provide a high-temperature mixed gas to the dissolution system to oxidize the radioactive material; wherein the dissolution system includes a body for dissolving the radioactive material, a heat sink connected to the body, and a cover for closing or opening the body, a sealing member is formed between the cover and the heat sink, and the heat sink is configured to diffuse the heat of the body outward.

[0007] The radioactive material dissolution device provided in the embodiment of the present application can utilize a heat sink to lower the temperature at the seal, thereby avoiding a significant shortening of the service life of the seal due to a high temperature of the seal caused by the introduction of a high-temperature mixed gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Other objects and advantages of the present application will become apparent from the following description of the embodiments of the present application with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the present application.

[0009] Figure 1 It is a schematic diagram of the structure of a radioactive material dissolving device provided in an embodiment of the present application.

[0010] Figure 2 It is a schematic structural diagram of a high-temperature mixed gas generating component of a radioactive material dissolving device provided in an embodiment of the present application.

[0011] Figure 3 It is a schematic structural diagram of a preheating component of a radioactive material dissolution device provided in an embodiment of the present application.

[0012] Figure 4 yes Figure 3 The schematic diagram of the structure of the preheating part is shown after the preheating pipeline protection shell is omitted.

[0013] Figure 5 yes Figure 3 The schematic diagram of the structure of the preheating element is shown after the preheating pipeline protection shell and part of the preheating pipeline heat conducting element are omitted.

[0014] Figure 6 It is a schematic diagram of the structure of the dissolution system of the radioactive material dissolution device provided in the embodiment of the present application.

[0015] Figure 7 yes Figure 6 A cross-sectional schematic diagram of the dissolution system is shown.

[0016] Figure 8 yes Figure 6 A schematic cross-sectional view of the dissolution system from another angle is shown.

[0017] Fig. 9 yes Figure 6 The dissolution system is shown in a schematic top view with the cover omitted.

[0018] Fig.10 yes Fig. 9 The dissolution system shown is a schematic top view with the heat sink omitted.

[0019] Fig.11 yes Figure 6 A schematic diagram of the structure consisting of a main insulation component and an air cooling component of a dissolution system is shown.

[0020] Fig.12 yes Figure 6 A schematic cross-sectional view of the dissolution system from another angle is shown.

[0021] Fig.13 yes Figure 6The schematic diagram of the structure of the dissolution system is shown after the cover of the dissolution system opens the upper opening of the dissolution tank.

[0022] Description of reference numerals:

[0023] 100. dissolving device; 10. dissolving system;

[0024] 11. body; 111. first side plate; 1111. first position-limiting portion; 1112. second position-limiting portion; 112. second side plate; 113. connection and matching portion; 12. heat sink; 121. water-cooling heat sink; 122. cooling water inlet; 123. cooling water outlet; 124. air-cooling heat sink; 125. connection portion;

[0025] 13. Dissolving tank; 131. First zone; 132. Second zone; 133. Third zone; 14. Cover; 141. Cover plate; 142. Cover plate heating assembly; 1421. Cover plate heating element; 1422. Cover plate heat conducting element; 1423. Cover plate protective shell; 1424. Cover plate heat insulating element; 15. Sealing element;

[0026] 16. Main body heating component; 161. Main body heating element; 162. Main body heat conducting element; 163. Main body heat insulation element; 1631. Heat insulation body; 1632. Partition plate; 1633. Heat dissipation channel; 164. Main body protective shell; 17. Air cooling component; 171. Air inlet pipeline; 172. Air outlet pipeline; 173. Cooling air pipe;

[0027] 101, feed pipeline; 102, air intake pipeline; 103, liquid return pipeline; 104, liquid outlet pipeline; 105, air extraction pipeline; 106, air piercing pipeline; 107, bottom insulation; 108, side insulation; 109, side protective shell;

[0028] 30. Feeding system; 40. Air supply system;

[0029] 41. Preheating part; 411. Preheating pipeline; 412. Preheating pipeline heating element; 413. Preheating pipeline heat conducting element; 414. Air inlet pipeline; 415. Air outlet pipeline; 416. Installation pipeline; 417. Preheating pipeline protective shell;

[0030] 42. High-temperature mixed gas generating element; 421. Main body; 422. Air inlet pipeline; 423. Air outlet pipeline; 424. Liquid inlet pipeline; 425. Exhaust pipeline; 426. Main body heating element; 427. Temperature monitoring element; 428. Pressure monitoring element.

[0031] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner that does not affect the reader's understanding. DETAILED DESCRIPTION

[0032] Exemplary embodiments of the present application will be described below in conjunction with the accompanying drawings. For the sake of clarity and conciseness, not all features of the actual implementation are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the process of developing any such actual implementation in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and these constraints may vary from implementation to implementation. In addition, it should be understood that although the development work may be very complex and time-consuming, it is only a routine task for those skilled in the art who benefit from the content of this application.

[0033] It is also necessary to explain here that, in order to avoid obscuring the present application due to unnecessary details, only the device structure and / or processing steps closely related to the scheme according to the present application are shown in the accompanying drawings, while other details that are not very relevant to the present application are omitted.

[0034] See also Figure 1 The embodiment of the present application provides a radioactive material dissolving device (hereinafter referred to as the dissolving device), the radioactive material is collected on a radioactive sample plate, and the dissolving device 100 may include a dissolving system 10, a feeding system 30, and a gas supply system 40. The dissolving system 10 is configured to dissolve the radioactive material; the feeding system 30 is configured to add a liquid for dissolving the radioactive material into the dissolving system 10; the gas supply system 40 is configured to provide a high-temperature mixed gas to the dissolving system 10 to oxidize the radioactive material; wherein the dissolving system 10 may include a body 11 for dissolving the radioactive material, a heat sink 12 connected to the body 11, and a cover 14 for closing or opening the body 11, a sealing member 15 is formed between the cover 14 and the heat sink 12, and the heat sink 12 is configured to diffuse the heat of the body 11 outward.

[0035] The dissolving device 100 provided in the embodiment of the present application can utilize the heat sink 12 to lower the temperature of the seal 15 , thereby avoiding the high temperature of the seal 15 caused by the introduction of high-temperature mixed gas, which significantly shortens the service life of the seal 15 .

[0036] In some embodiments, the liquid added to the dissolution system 10 for dissolving the radioactive material may be an acidic solution, such as nitric acid and hydrofluoric acid. In some embodiments, the dissolution system 10 may be disposed in a glove box.

[0037] In some embodiments, the radioactive material may be in powder form. In some embodiments, the temperature of the high temperature mixed gas may be 350°C.

[0038] In some embodiments, the sealing member 15 may be a rubber sealing ring. The sealing member 15 may be disposed on the heat sink 12 .

[0039] See also Figure 6 and Figure 7 In some embodiments, the body 11 may form a dissolution tank 13 for accommodating a radioactive sample plate. In some embodiments, the dissolution system 10 may further include a feed line 101 and an air intake line 102. The feed line 101 is configured to connect the feeding system 30 with the dissolution tank 13 so as to add liquid for dissolving radioactive materials into the dissolution tank 13; the air intake line 102 is configured to connect the gas supply system 40 with the dissolution tank 13 so as to connect the two so as to introduce a high-temperature mixed gas into the body 11; the feed line 101 and the air intake line 102 are configured to first introduce a high-temperature mixed gas into the dissolution tank 13 and then add liquid into the dissolution tank 13.

[0040] In the related art, a nitric acid-hydrofluoric acid mixture is used to dissolve radioactive materials under heating conditions. During the dissolution, in order to completely dissolve the radioactive materials, a high concentration of hydrofluoric acid is used. However, the inventors of the present application have found that high-concentration hydrofluoric acid will corrode the radioactive sample plate under heating conditions, increasing the impurity content in the solution containing the radioactive materials, increasing the difficulty of subsequent purification of the radioactive materials, and being detrimental to the efficient and rapid recovery of the radioactive materials.

[0041] Therefore, in the embodiment of the present application, the feed pipeline 101 and the air intake pipeline 102 are configured to first introduce a high-temperature mixed gas into the dissolution tank 13, and then add a feed liquid into the dissolution tank 13 to oxidize the radioactive material to obtain an oxidized radioactive material; and then the oxidized radioactive material is dissolved. Since the oxidized radioactive material has the characteristics of a large specific surface area and a strong reaction activity, it can be dissolved under milder conditions, and almost no hydrofluoric acid is required for the dissolution or the required hydrofluoric acid content is very low, which can reduce the corrosion of the radioactive sample plate and reduce the impurities in the solution containing the radioactive material.

[0042] In some embodiments, the dissolution system 10 may further include a pressure measuring device for monitoring the pressure in the dissolution tank 13. In some embodiments, a high-temperature mixed gas is introduced into the dissolution tank 13 through the air inlet line 102 under negative pressure.

[0043] See also Figure 7 In some embodiments, a connection portion 125 is formed at the end of the heat sink 12 facing the body 11, and a connection matching portion 113 is formed at the end of the body 11 facing the heat sink 12. The thickness of the connection portion 125 is less than the thickness of other parts of the heat sink 12, and the thickness of the connection matching portion 113 is less than the thickness of other parts of the body 11, so as to reduce the heat conduction between the two, thereby reducing the heat conduction directly to the heat sink 12 on the one hand, and the heat dissipation effect of the heat sink 12 on the other hand, which can significantly reduce the temperature of the sealing member 15.

[0044] In some embodiments, the connecting portion 125 may include a tapered section that gradually extends toward the direction approaching the main body 11 and an annular protrusion section connected to the tapered section; the connecting mating portion 113 may include a tapered section that gradually extends toward the direction approaching the heat sink 12 and an annular groove section connected to the tapered section, and the annular protrusion section of the connecting portion 125 is embedded in the annular groove section of the connecting mating portion 113, which is beneficial for reducing the contact area between the two and facilitating a sealed connection between the two.

[0045] In some embodiments, the heat sink 12 can diffuse the heat of the dissolving tank 13 outward. The heat sink 12 can include multiple heat sinks to increase the heat dissipation area, which can significantly reduce the temperature of the sealing member 15 and prevent the sealing member 15 from being damaged.

[0046] In order to reduce radioactive contamination, after the dissolution is completed, the radioactive sample plate needs to be dried in the dissolution tank 13. The inventors of the present application found that when the radioactive sample plate is dried, the service life of the seal 15 is significantly shortened due to the high temperature at the seal 15. The dissolution system 10 provided in the embodiment of the present application can reduce the temperature at the seal 15 by using the heat sink 12, thereby avoiding the service life of the seal 15 being significantly shortened due to the high temperature at the seal 15 when the radioactive sample plate is dried.

[0047] See also Figure 6 and Figure 7 In some embodiments, the heat sink 12 may include a water-cooled heat sink 121. The water-cooled heat sink 121 may be arranged radially outside the dissolution tank 13 for cooling water to flow so as to diffuse the heat of the dissolution tank 13 outward. In some embodiments, the water-cooled heat sink 121 may include a water-cooled inlet and a water-cooled outlet. The heat sink 12 may also be provided with a cooling water inlet 122 and a cooling water outlet 123. The cooling water inlet 122 is connected to the water-cooled inlet of the water-cooled heat sink 121, and the cooling water outlet 123 is connected to the water-cooled outlet of the water-cooled heat sink 121. The cooling water can enter the water-cooled heat sink 121 through the cooling water inlet 122 and the water-cooled inlet. The cooling water entering the water-cooled heat sink 121 can exchange heat with the dissolution tank 13 to diffuse the heat of the dissolution tank 13 outward. After the heat exchange is completed, the cooling water can leave the water-cooled heat sink 121 through the cooling water outlet 123 and the water-cooled outlet. In such an embodiment, the heat of the dissolution tank 13 can be diffused outward by heat exchange with cooling water. See. Figure 8 In some embodiments, the water-cooling heat dissipation portion 121 may be an annular water-cooling cavity.

[0048] See also Figure 7In some embodiments, the heat sink 12 may further include an air-cooled heat sink 124, which may be disposed between the dissolving tank 13 and the water-cooled heat sink 121. A temperature gradient may be formed at the air-cooled heat sink 124, and the heat of the dissolving tank 13 may be further diffused outward through the temperature gradient. In some embodiments, the air-cooled heat sink may be a heat sink chamber, and cold air may be disposed in the chamber. The cross-sectional shape of the air-cooled heat sink 124 may be "L"-shaped, and the long side of the "L"-shaped air-cooled heat sink 124 may be formed on the radial inner side of the water-cooled heat sink 121, and the short side of the air-cooled heat sink 124 may be formed on one side of the end face of the water-cooled heat sink 121 facing the dissolving tank 13. The long side and the short side of the air-cooled heat sink 124 may form a temperature gradient, and the heat of the dissolving tank 13 may be further diffused outward through the temperature gradient.

[0049] See also Fig. 9 and Fig.10 In some embodiments, the body 11 may include two first side panels 111 disposed opposite to each other and two second side panels 112 disposed opposite to each other, and the width of the first side panel 111 is greater than the length of the second side panel 112 .

[0050] See also Figure 6 and Figure 7 In some embodiments, the dissolution system 10 may further include a body heating assembly 16, the number of which is two, and the two body heating assemblies 16 are respectively arranged facing the two first side plates 111, and are used to heat the two first side plates 111. Such an arrangement can make the heating area and heat dissipation area of ​​the body 11 larger, which is conducive to improving the heating efficiency and heat dissipation efficiency.

[0051] See also Figure 6 and Figure 7 In some embodiments, the body heating assembly 16 may include a plurality of body heating elements 161, a body heat conducting element 162, a body heat insulating element 163, and a body protective shell 164. The plurality of body heating elements 161 are used to provide heat; the plurality of body heating elements 161 are arranged in the body heat conducting element 162, and the body heat conducting element 162 is used to be thermally connected with the two first side plates 111 to conduct the heat provided by the body heating element 161 to the first side plates 111; the body heat insulating element 163 is arranged on the outside of the body heat conducting element 162 to keep the body heat conducting element 162 warm; the body protective shell 164 is arranged on the outside of the body heat insulating element 163 to protect the body heat insulating element 163. In such an embodiment, when the body 11 is heated, it is beneficial to improve the heating efficiency and the heat preservation effect; when the body 11 is dissipated, it is beneficial to achieve rapid heat dissipation of the body 11.

[0052] In some embodiments, a plurality of openings may be formed on the main body heat conducting member 162 along the height direction, and a plurality of main body heating members 161 may be respectively embedded in one opening. In some embodiments, the joints of the main body heating member 161 may be arranged in a quick-release form for easy inspection and maintenance.

[0053] The main body heating element 161 is, for example, an electric heating rod, the main body heat conducting element 162 is, for example, graphite, and the main body heat insulating element 163 is, for example, heat insulating cotton.

[0054] In some embodiments, the body heating assembly 16 can be used to heat the body 11 when dissolving radioactive substances; the body heating assembly 16 can also be used to heat the body 11 when drying a radioactive sample plate.

[0055] In some embodiments, when dissolving radioactive materials, the body heating assembly 16 may heat the body 11 to a dissolving temperature of 80-90° C. In some embodiments, when heating and drying a radioactive sample plate, the body heating assembly 16 may heat the body 11 to a drying temperature of 170-180° C.

[0056] See also Fig.10 and Fig.12 In some embodiments, the two first side plates 111 of the body 11 respectively form two first limiting portions 1111 disposed opposite to each other, and the two first limiting portions 1111 sequentially separate the dissolving tank 13 into a first area 131, a second area 132, and a third area 133, and the first area 131, the second area 132, and the third area 133 are interconnected. The feed liquid from the feed pipeline 101 enters the first area 131 and can flow to the second area 132, and the high-temperature mixed gas from the air intake pipeline 102 enters the second area 132, and the radioactive sample plate is disposed in the second area 132.

[0057] See also Figure 6 In some embodiments, the dissolution system 10 may further include a liquid return pipeline 103 and a liquid outlet pipeline 104, which are respectively arranged in the third zone 133 and the first zone 131, and the liquid return pipeline 103 is used to supply the liquid in the dissolution tank 13 to flow out of the dissolution tank 13, and the liquid outlet pipeline 104 is used to supply the liquid flowing out of the dissolution tank 13 to flow back to the dissolution tank 13. Since the liquid return pipeline 103 and the liquid outlet pipeline 104 are respectively arranged in the third zone 133 and the first zone 131, after the liquid in the dissolution tank 13 flows out and in the process of flowing back again, the flow of the liquid between the three partitions can be accelerated, thereby playing the role of stirring the liquid in the dissolution tank 13, and accelerating the dissolution of the radioactive material.

[0058] In some embodiments, there is a gap between two first limiting portions 1111 on the two first side plates 111 to allow the feed liquid to flow. The gap between the two first limiting portions 1111 is smaller than the thickness of the radioactive sample plate to prevent the radioactive sample plate from entering the gap. In some embodiments, the first limiting portion 1111 may be a protrusion.

[0059] In some embodiments, the bottom wall of the dissolution tank 13 can form a slope, and the liquid inlet of the liquid outlet pipeline 104 can be located at the lowest point of the slope of the bottom wall of the dissolution tank 13, so that the liquid can converge to the liquid inlet of the liquid outlet pipeline 104, which is beneficial for completely extracting the dissolved liquid after the dissolution is completed.

[0060] See also Fig.10 and Fig.12 In some embodiments, the two first side plates 111 of the body 11 may further respectively form second limiting portions 1112 disposed opposite to each other, and the second limiting portions 1112 are located in the second area 132, and are used to limit the movement of the radioactive sample plate toward the first side plate 111, so that the radioactive sample plate can stand upright in the second area 132. In some embodiments, there is a gap between the two opposite second limiting portions 1112 on the two first side plates 111, and the gap is greater than the thickness of the radioactive sample plate.

[0061] In some embodiments, the second limiting portion 1112 may be a protrusion, and the end surface of the protrusion facing the heat sink 12 forms a slope to guide the radioactive sample plate so that the radioactive sample plate can enter between two oppositely arranged second limiting portions 1112 .

[0062] See also Figure 6 and Fig.13 In some embodiments, the dissolution tank 13 may have an upper opening, and the cover 14 is used to close the upper opening of the dissolution tank 13. The radioactive sample plate can be placed in the second area 132 from the upper opening. In some embodiments, the cover 14 is connected to a lifting mechanism to achieve the overall lifting movement of the cover 14, thereby closing the upper opening of the dissolution tank 13 or opening the upper opening of the dissolution tank 13.

[0063] See also Figure 6 and Figure 7 In some embodiments, the cover 14 may include a cover plate 141 and a cover plate heating assembly 142 , wherein the cover plate heating assembly 142 is disposed on the cover plate 141 for heating the cover plate 141 .

[0064] The inventors of the present application found that after drying the radioactive sample plate, condensed water will remain on the inner surface of the cover plate 141. Even by extending the drying time, it is difficult to completely dry the inside of the cover plate 141. This will cause radioactive contamination problems. The inventors of the present application further found that this is because when the radioactive sample plate is dried, the cover plate 141 is located in the external environment. Since the cover plate 141 is usually made of metal material, the material has fast heat conduction, so the temperature of the cover plate 141 is relatively low, which results in condensed water always remaining on the inner surface of the cover plate 141 after drying.

[0065] The dissolution system 10 provided in the embodiment of the present application heats the cover plate 141 by setting a cover plate heating assembly 142 to increase the temperature of the cover plate 141, thereby avoiding the formation of condensed water residue due to the low temperature of the cover plate 141 when drying the radioactive sample plate.

[0066] In some embodiments, when drying the radioactive sample plate, the cover plate heating assembly 142 heats the cover plate 141, and the heating temperature is lower than the drying temperature to avoid adverse effects on the seal 15. The heating temperature of the cover plate heating assembly 142 can be, for example, 110-120°C.

[0067] See also Figure 7 and Fig.12 In some embodiments, the cover heating assembly 142 may include a cover heating element 1421, a cover heat conductive element 1422, a cover heat insulating element 1424, and a cover protective shell 1423. The cover heating element 1421 is used to provide heat; the cover heat conductive element 1422 is thermally connected to the cover 141, and is used to conduct the heat provided by the cover heating element 1421 to the cover 141; the cover heat insulating element 1424 is arranged on the outside of the cover heat conductive element 1422, and is used to keep the cover heat conductive element 1422 warm; the cover protective shell 1423 is arranged on the outside of the cover heat insulating element 1424, and is used to protect the cover heat insulating element 1424. The cover heating element 1421 may be, for example, an electric heating rod. The material of the cover heat conductive element 1422 may be, for example, graphite.

[0068] In some embodiments, a plurality of openings may be formed on the cover plate heat conducting member 1422 along the height direction, and a plurality of cover plate heating members 1421 may be respectively embedded in one opening. In some embodiments, the cover plate heating assembly 142 may further include: a temperature measuring member, disposed in the cover plate heat conducting member 1422, for detecting the temperature of the cover plate heat conducting member 1422.

[0069] See also Figure 6 , Figure 7 as well as Fig.11In some embodiments, the dissolution system 10 may further include an air cooling component 17 for diffusing the heat of the body 11 outward. The air cooling component 17 includes an air inlet pipeline 171, an air outlet pipeline 172, and a cooling air pipe 173. The air inlet pipeline 171 is arranged at one end of the body insulation 163 away from the heat sink 12, the air outlet pipeline 172 is arranged at one end of the body insulation 163 close to the heat sink 12, and the cooling air pipe 173 is arranged inside the body insulation 163; the air inlet pipeline 171 is connected to the cooling air pipe 173 and is in fluid communication with the cooling air pipe 173, and the gas can flow to the cooling air pipe 173 through the air inlet pipeline 171; the cooling air pipe 173 is formed with a plurality of through holes, and the gas entering the cooling air pipe 173 can flow out of the cooling air pipe 173 through the through holes, dissipate heat with the body 11, so as to realize the diffusing of the heat of the body 11 outward; the gas after heat dissipation can flow out of the air cooling component 17 through the air outlet pipeline 172. Such an arrangement can exchange heat between the gas and the body 11 , which is beneficial to further achieve rapid heat dissipation of the body 11 .

[0070] After one dissolution process is completed, the temperature of the dissolution tank 13 is relatively high because the main body heating component 16 heats the main body 11 to dry the radioactive sample plate during the dissolution process. When the next dissolution is performed, the acid solution is introduced into the dissolution tank 13 under negative pressure. Due to the high temperature in the dissolution tank 13, the acid solution vaporizes to form acidic gas. The acidic gas will be sucked away in a negative pressure environment and cannot be recovered.

[0071] In order to shorten the time interval between two dissolution processes and prevent the acidic solution added next from vaporizing and generating acidic gas at a high temperature, the dissolution system 10 provided in the embodiment of the present application is provided with an air cooling component 17, and heat is exchanged between the gas and the body 11, which is conducive to further realizing rapid heat dissipation of the body 11. After the temperature of the body 11 is reduced to a suitable temperature, the acidic solution is introduced into the dissolution tank 13 under negative pressure, which can prevent the acidic solution from vaporizing due to the high temperature.

[0072] See also Fig.11 In some embodiments, the body heat preservation member 163 may include a heat preservation body 1631 and a plurality of partition plates 1632, the plurality of partition plates 1632 are connected to the heat preservation body 1631, and the plurality of partition plates 1632 and the heat preservation body 1631 together form a plurality of heat dissipation channels 1633. In some implementations, the cooling air pipe 173 is in fluid communication with the heat dissipation channel 1633, and the gas entering the cooling air pipe 173 can enter the heat dissipation channel 1633 through the through hole; the heat dissipation channel 1633 is also in fluid communication with the air outlet pipeline 172, and the gas entering the heat dissipation channel 1633 can flow out through the air outlet pipeline 172.

[0073] See also Figure 6In some embodiments, the dissolution system 10 may further include an exhaust pipe 105 and a piercing pipe 106, the exhaust pipe 105 and the piercing pipe 106 are in fluid communication with the dissolution tank 13; the gas in the dissolution tank 13 may flow out of the dissolution tank 13 through the exhaust pipe 105, so that a negative pressure environment is formed in the dissolution tank 13; the piercing pipe 106 is also in fluid communication with the glove box, and the gas in the glove box may enter the dissolution tank 13 through the piercing pipe 106, so that the dissolution tank 13 changes from a negative pressure environment to a normal pressure environment. In some embodiments, the exhaust pipe 105 and the piercing pipe 106 may be disposed on the heat sink 12.

[0074] See also Fig.12 In some embodiments, the dissolution system 10 further includes two side insulation members 108, which are respectively fixed to the two second side plates 112 for heat preservation of the second side plates 112. Since the length of the second side plate 112 is less than the length of the first side plate 111, the side insulation members 108 have little effect on the heat dissipation of the body 11.

[0075] See also Figure 6 In some embodiments, the dissolution system 10 may further include a side protective shell 109 disposed on the outside of the side insulation member 108 to protect the side insulation member 108 .

[0076] See also Figure 7 In some embodiments, the dissolution system 10 may further include a bottom insulation member 107 disposed at the bottom of the body 11 for insulating the dissolution tank 13 .

[0077] In some embodiments, the high temperature mixed gas may be a mixed gas of nitrogen and water vapor. Figure 1 In some embodiments, the gas supply system 40 may include a preheating component 41 and a high-temperature mixed gas generating component 42 .

[0078] The preheating element 41 is used to preheat nitrogen. The preheating element 41 is fluidically connected to the high-temperature mixed gas generating element 42 . The preheated nitrogen can flow from the preheating element 41 into the high-temperature mixed gas generating element 42 .

[0079] The high-temperature mixed gas generating element 42 includes a liquid inlet pipeline 424 for external liquid water to enter the high-temperature mixed gas generating element 42. The liquid water and the preheated nitrogen can be heated in the high-temperature mixed gas generating element 42 to obtain a high-temperature mixed gas. The high-temperature mixed gas generating element may also include an outlet pipeline 423, which is connected to the inlet pipeline 102. The high-temperature mixed gas can enter the dissolving tank 13 through the outlet pipeline 423 and the inlet pipeline 102. In such an embodiment, preheating the nitrogen by the preheating element 41 can reduce the heating time required to generate the high-temperature mixed gas and increase the generation rate of the high-temperature mixed gas.

[0080] See also Figure 2 In some embodiments, the high-temperature mixed gas generating element 42 may include a body 421, an air inlet pipeline 422, an exhaust pipeline 425, and a body heating element 426. The body 421 is formed with a space for heating the mixed gas. The body 421 is connected to the liquid inlet pipeline 424, and liquid water can flow into the body 421 through the liquid inlet pipeline 424; the air inlet pipeline 422 is fluidly connected to the body 421 and the preheating element 41, and the preheated nitrogen can flow into the body 421 through the air inlet pipeline 422; the exhaust pipeline 425 is fluidly connected to the body 421, and is used to discharge the excess gas in the body 421, so as to adjust the pressure in the body 421 and avoid the safety risk caused by excessive pressure in the body 421; the body heating element 426 is used to heat the body 421.

[0081] See also Figure 2 In some embodiments, the air inlet pipeline 422, the air outlet pipeline 423, the liquid inlet pipeline 424, the exhaust pipeline 425 and the body heating element 426 are all disposed on the body 421. The body heating element 426 is, for example, an electric heating rod.

[0082] See also Figure 2 In some embodiments, the high temperature mixed gas generating element 42 may further include a temperature monitoring element 427 and a pressure monitoring element 428, both of which are disposed on the body 421 and are used to detect the temperature of the body 421 and the pressure of the body 421, respectively. The temperature monitoring element 427 is, for example, a K-type thermocouple temperature transmitter, and the pressure monitoring element 428 is, for example, a high temperature resistant pressure transmitter.

[0083] See also Figure 3 , Figure 4 as well as Figure 5 In some embodiments, the preheating element 41 may include a preheating pipeline 411, a preheating pipeline heating element 412, a preheating pipeline heat conducting element 413, and a preheating pipeline protection shell 417. The preheating pipeline 411 is configured to form a space for preheating nitrogen; the preheating pipeline heating element 412 is used to provide heat; multiple preheating pipeline heating elements 412 are arranged in the preheating pipeline heat conducting element 413, and the preheating pipeline heat conducting element 413 is used to be thermally connected with the preheating pipeline 411 to conduct the heat provided by the preheating pipeline heating element 412 to the preheating pipeline 411; the preheating pipeline protection shell 417 is arranged outside the preheating pipeline heat conducting element 413 to protect the preheating pipeline heat conducting element 413.

[0084] In some embodiments, a preheating pipeline 411 heat-insulating member is further provided between the preheating pipeline heat-conducting member 413 and the preheating pipeline protection shell 417, for heat-insulating the preheating pipeline heat-conducting member 413. The preheating pipeline 411 heat-insulating member is, for example, heat-insulating cotton.

[0085] See also Figure 5In some embodiments, the preheating element 41 may further include an air inlet pipeline 414, an air outlet pipeline 415, and an installation pipeline 416. The air inlet pipeline 414 and the air outlet pipeline 415 are both connected to the preheating pipeline 411, and the nitrogen can enter the preheating pipeline 411 through the air inlet pipeline 414. The preheated nitrogen can flow out of the preheating pipeline 411 through the air outlet pipeline 415 and flow into the high-temperature mixed gas generating element 42; the installation pipeline 416 is connected to the air outlet pipeline 415 and is used to install a nitrogen temperature monitoring element to monitor the temperature of the preheated nitrogen. The nitrogen temperature monitoring element is, for example, a thermocouple.

[0086] In some embodiments, when the water vapor and nitrogen in the high-temperature mixed gas generating element 42 are evenly mixed and the temperature reaches 350°C, the high-temperature mixed gas can flow into the dissolution tank 13 through the air intake pipe 102; when the pressure in the dissolution tank 13 measured by the pressure measuring element reaches a slightly positive pressure, it indicates that the dissolution tank 13 is filled with a mixed gas of high-temperature water vapor and nitrogen.

[0087] In some embodiments, the volume of the high-temperature mixed gas generating element 42 can be determined according to the number of dissolutions, and the volume of the high-temperature mixed gas generating element 42 should be larger than the volume of the high-temperature mixed gas required for all dissolution processes.

[0088] Regarding the embodiments of the present application, it should also be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other to obtain new embodiments.

[0089] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A radioactive material dissolution device, wherein the radioactive material is collected on a radioactive sample plate, characterized in that: include: a dissolution system configured to dissolve radioactive material; A feeding system, configured to add a liquid for dissolving the radioactive material into the dissolution system; a gas supply system configured to provide a high-temperature mixed gas to the dissolution system to oxidize the radioactive material; The dissolution system includes a body for the radioactive material, a heat sink connected to the body, and a cover for closing or opening the body. A seal is formed between the cover and the heat sink, and the heat sink is configured to diffuse the heat of the body outward.

2. The device according to claim 1, characterized in that The body forms a dissolution tank for accommodating the radioactive sample plate; The dissolution system also includes: A feed pipeline, configured to connect the feed system with the dissolution tank fluid so as to add a feed liquid for dissolving the radioactive material into the dissolution tank; an air inlet pipeline, configured to connect the air supply system and the dissolving tank so that the two are fluidically connected to introduce the high-temperature mixed gas into the body; The feed pipeline and the air intake pipeline are configured to firstly introduce the high-temperature mixed gas into the dissolving tank, and then add the feed liquid into the dissolving tank.

3. The device according to claim 1, characterized in that The end of the heat sink facing the body forms a connecting portion, and the end of the body facing the heat sink forms a connecting matching portion, and the thickness of the connecting portion is smaller than the thickness of other parts of the heat sink; The thickness of the connecting and matching portion is smaller than the thickness of other portions of the body, so as to reduce heat conduction between the two portions.

4. The device according to claim 2, characterized in that The heat sink can diffuse the heat of the dissolution tank outwards. The heat sink includes a plurality of heat dissipation parts to increase the heat dissipation area.

5. The device according to claim 4, characterized in that The heat sink comprises a water-cooling heat sink, which is arranged radially outside the dissolving tank and is used for cooling water to flow so as to diffuse the heat of the dissolving tank outwards.

6. The device according to claim 5, characterized in that The heat sink also includes an air-cooled heat sink, which is arranged between the dissolution tank and the water-cooled heat sink. A temperature gradient can be formed at the air-cooled heat sink, and the heat of the dissolution tank can be further diffused outward through the temperature gradient.

7. The device according to claim 4, characterized in that The body comprises two first side panels arranged opposite to each other and two second side panels arranged opposite to each other, wherein the width of the first side panels is greater than the length of the second side panels; The dissolution system further comprises a main body heating assembly, the number of the main body heating assemblies is two, and the two main body heating assemblies are respectively arranged facing the two first side plates for heating the two first side plates.

8. The device according to claim 7, characterized in that The two first side plates of the body respectively form two first limiting parts arranged opposite to each other, and the two first limiting parts sequentially separate the dissolving tank into a first area, a second area and a third area, and the first area, the second area and the third area are connected to each other; The feed liquid from the feed pipeline enters the first zone and can flow to the second zone. The high-temperature mixed gas from the air intake pipeline enters the second zone. The radioactive sample plate is arranged in the second zone. The dissolution system further includes a liquid return pipeline and a liquid outlet pipeline, wherein the liquid return pipeline and the liquid outlet pipeline are respectively arranged in the third zone and the first zone. The liquid return pipeline is used for allowing the liquid in the dissolving tank to flow out of the dissolving tank, and the liquid outlet pipeline is used for allowing the liquid flowing out of the dissolving tank to flow back to the dissolving tank.

9. The device according to claim 8, characterized in that The two first side plates of the main body respectively form second limiting portions which are arranged opposite to each other. The second limiting portions are located in the second area and are used to limit the movement of the radioactive sample plate toward the first side plates.

10. The device according to claim 1, characterized in that The cover comprises: A cover plate and a cover plate heating component, wherein the cover plate heating component is arranged on the cover plate and is used to heat the cover plate.

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