Radioactive material dissolving device

Abstract

Embodiments of the present application relate to the technical field of radioactive material transfer, and 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 configured to dissolve radioactive material; the feeding system is configured to add a liquid for dissolving radioactive material into the dissolving system; and the gas supply system is configured to provide high-temperature mixed gas to the dissolving system to oxidize the radioactive material. The dissolving system comprises a body for dissolving radioactive material, a heat dissipation member connected to the body, and a cover member for closing or opening the body. A seal is formed between the cover member and the heat dissipation member, and the heat dissipation member is configured to diffuse heat of the body outward. The radioactive material dissolving device provided by the embodiments of the present application can reduce the temperature at the seal by using the heat dissipation member, thereby avoiding the temperature at the seal being too high due to the high-temperature mixed gas being introduced, and significantly shortening the service life of the seal.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of radioactive material transfer, and in particular, to a radioactive material dissolving device. BACKGROUND

[0002] The statements herein are merely provided to give general background information on the present application, and do not necessarily constitute the prior art.

[0003] When transferring radioactive material, the radioactive material can be dissolved by using a dissolving system. The dissolving system usually includes a body forming a dissolving space, a cover for closing or opening the body, and a sealing member arranged between the body and the cover to realize sealing therebetween.

[0004] The inventor of the present application finds that the sealing member arranged between the body and the cover is prone to damage after being used for a period of time. The inventor of the present application further finds that since high-temperature mixed gas is introduced into the body during dissolving, the temperature at which the sealing member is located is relatively high, thereby significantly shortening the service life of the sealing member. SUMMARY

[0005] A brief summary of the present application is given in the following to provide a basic understanding of some aspects of the present application. It should be understood that this summary is not an exhaustive overview of the present application. It is not intended to identify key or important parts of the present application nor to delineate the scope of the present application. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

[0006] To solve the above problems, embodiments of the present application provide a radioactive material dissolving device, in which radioactive material is collected on a radioactive sample plate. The dissolving device can include a dissolving system, a feeding system, and a gas supply system. The dissolving system is arranged to dissolve the radioactive material. The feeding system is arranged to add a liquid for dissolving the radioactive material into the dissolving system. The gas supply system is arranged to provide high-temperature mixed gas to the dissolving system to oxidize the radioactive material. The dissolving system includes a body for dissolving the radioactive material, a heat dissipation member connected to the body, and a cover for closing or opening the body. A sealing member is formed between the cover and the heat dissipation member. The heat dissipation member is arranged to be capable of diffusing heat of the body outward.

[0007] The radioactive material dissolving device provided by the embodiments of the present application can utilize the heat dissipation member to reduce the temperature at the sealing member, thereby avoiding the temperature at the sealing member being relatively high due to the introduction of high-temperature mixed gas, and significantly shortening the service life of the sealing member. BRIEF DESCRIPTION OF DRAWINGS

[0008] Other objects and advantages of the present application will be apparent to those skilled in the art from the following description of embodiments of the present application, taken in conjunction with the accompanying drawings.

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

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

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

[0012] Figure 4 is Figure 3 is a structural schematic diagram of a preheating component after a preheating pipeline protection shell is removed.

[0013] Figure 5 is Figure 3 is a structural schematic diagram of a preheating component after a preheating pipeline protection shell and part of a preheating pipeline heat conducting component are removed.

[0014] Figure 6 is a structural schematic diagram of a dissolving system of a radioactive material dissolving device provided by an embodiment of the present application.

[0015] Figure 7 is Figure 6 is a cross-sectional schematic diagram of a dissolving system.

[0016] Figure 8 is Figure 6 is a cross-sectional schematic diagram of a dissolving system from another angle.

[0017] Figure 9 is Figure 6 is a top view schematic diagram of a dissolving system after a cover component is removed.

[0018] Figure 10 is Figure 9 is a top view schematic diagram of a dissolving system after a heat dissipation component is removed.

[0019] Figure 11 is Figure 6 is a structural schematic diagram of a body heat preservation component and a gas cooling assembly of a dissolving system.

[0020] Figure 12 is Figure 6 is a cross-sectional schematic diagram of a dissolving system from another angle.

[0021] Figure 13 is Figure 6Structure diagram of the dissolution system after the cover opens the upper opening of the dissolution tank.

[0022] Explanation of reference numerals:

[0023] 100, dissolution device; 10, dissolution system;

[0024] 11, body; 111, first side plate; 1111, first limiting part; 1112, second limiting part; 112, second side plate; 113, connecting fitting part; 12, heat dissipation part; 121, water-cooled heat dissipation part; 122, cooling water inlet; 123, cooling water outlet; 124, air-cooled heat dissipation part; 125, connecting part;

[0025] 13, dissolution tank; 131, first zone; 132, second zone; 133, third zone; 14, cover; 141, cover plate; 142, cover plate heating assembly; 1421, cover plate heating part; 1422, cover plate heat conduction part; 1423, cover plate protection shell; 1424, cover plate heat preservation part; 15, sealing part;

[0026] 16, body heating assembly; 161, body heating part; 162, body heat conduction part; 163, body heat preservation part; 1631, heat preservation main body; 1632, partition plate; 1633, heat dissipation channel; 164, body protection shell; 17, air cooling assembly; 171, air inlet pipeline; 172, air outlet pipeline; 173, cooling air pipe;

[0027] 101, feed pipeline; 102, air inlet pipeline; 103, liquid return pipeline; 104, liquid outlet pipeline; 105, air extraction pipeline; 106, air breaking pipeline; 107, bottom heat preservation part; 108, side heat preservation part; 109, side protection shell;

[0028] 30, feeding system; 40, air supply system;

[0029] 41, preheating part; 411, preheating pipeline; 412, preheating pipeline heating part; 413, preheating pipeline heat conduction part; 414, air inlet pipeline; 415, air outlet pipeline; 416, mounting pipeline; 417, preheating pipeline protection shell;

[0030] 42, high-temperature mixed gas generating part; 421, body; 422, air inlet pipeline; 423, air outlet pipeline; 424, liquid inlet pipeline; 425, exhaust pipeline; 426, body heating part; 427, temperature monitoring part; 428, pressure monitoring part.

[0031] It should be noted that the drawings are not necessarily drawn to scale, but are only shown in a schematic manner without affecting the understanding of the reader. DETAILED DESCRIPTION

[0032] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. In the description, specific embodiments of the present application have not been described in all aspects with the purpose of clarity and conciseness. It should be appreciated, however, that many implementation-specific decisions can have to be made to develop any such actual implementation, to implement developer-specific goals, such as compliance with system- and business-related constraints, which will vary from one implementation to another. Moreover, it should be appreciated that, while the development work can be very complex and time-consuming, it would be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

[0033] It should also be noted herein that, in order not to obscure the present application with unnecessary detail, only the structures of the apparatus and / or the processing steps that are closely related to the solution according to the present application are shown in the drawings, while other details that are less relevant to the present application are omitted.

[0034] Referring to Figure 1 Embodiments of the present application provide a radioactive material dissolving device (hereinafter referred to as dissolving device) for dissolving radioactive material collected on a radioactive sample plate. The dissolving device 100 can 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 solution for dissolving the radioactive material into the dissolving system 10. The gas supply system 40 is configured to supply a high-temperature mixed gas to the dissolving system 10 to oxidize the radioactive material. The dissolving system 10 can include a body 11 for dissolving the radioactive material, a heat dissipation member 12 connected to the body 11, and a cover member 14 for closing or opening the body 11. A seal member 15 is formed between the cover member 14 and the heat dissipation member 12. The heat dissipation member 12 is configured to dissipate heat of the body 11 outward.

[0035] The dissolving device 100 according to embodiments of the present application can reduce the temperature at the seal member 15 by using the heat dissipation member 12, thereby avoiding a significant reduction in the service life of the seal member 15 due to a high temperature of the seal member 15 caused by the high-temperature mixed gas.

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

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

[0038] In some embodiments, the seal member 15 can be a rubber seal ring. The seal member 15 can be disposed on the heat dissipation member 12.

[0039] Referring to Figure 6 and Figure 7 In some embodiments, the body 11 can form a dissolving tank 13 for accommodating a radioactive sample plate. In some embodiments, the dissolving system 10 can further comprise a feed pipe 101 and a gas inlet pipe 102, the feed pipe 101 is arranged to make the feeding system 30 in fluid communication with the dissolving tank 13 to add a feed solution for dissolving radioactive materials into the dissolving tank 13; the gas inlet pipe 102 is arranged to connect the gas supply system 40 with the dissolving tank 13 to make them in fluid communication to introduce a high-temperature mixed gas into the body 11; the feed pipe 101 and the gas inlet pipe 102 are arranged to introduce the high-temperature mixed gas into the dissolving tank 13 first, and then add the feed solution into the dissolving tank 13.

[0040] In the related art, nitric acid-hydrofluoric acid mixed acid is used to dissolve radioactive materials under heating conditions. In order to completely dissolve the radioactive materials, a high concentration of hydrofluoric acid is used. The inventors of the present application have found that a high concentration of hydrofluoric acid under heating conditions can corrode the radioactive sample plate, increase the impurity content in the dissolving solution containing the dissolved radioactive materials, increase the difficulty of subsequent purification of the radioactive materials, and is not conducive to the efficient and rapid recovery of the radioactive materials.

[0041] Therefore, in the embodiments of the present application, the feed pipe 101 and the gas inlet pipe 102 are arranged to introduce the high-temperature mixed gas into the dissolving tank 13 first, and then add the feed solution into the dissolving tank 13, so that the radioactive materials are oxidized to obtain oxidized radioactive materials; and then the oxidized radioactive materials are dissolved. Due to the characteristics of the oxidized radioactive materials, such as large specific surface area and strong reactivity, the oxidized radioactive materials can be dissolved under relatively mild conditions, almost no hydrofluoric acid or a very low content of hydrofluoric acid is needed for dissolution, which can reduce the corrosion of the radioactive sample plate and reduce the impurities in the dissolving solution containing the dissolved radioactive materials.

[0042] In some embodiments, the dissolving system 10 can further comprise a pressure measuring member for monitoring the pressure in the dissolving tank 13. In some embodiments, the high-temperature mixed gas is introduced into the dissolving tank 13 through the gas inlet pipe 102 under negative pressure.

[0043] Referring to Figure 7 In some embodiments, the end of the heat dissipation member 12 facing the body 11 forms a connecting portion 125, and the end of the body 11 facing the heat dissipation member 12 forms a connecting mating portion 113. The thickness of the connecting portion 125 is less than the thickness of other parts of the heat dissipation member 12, and the thickness of the connecting mating 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 on the one hand reducing the direct conduction of heat to the heat dissipation member 12, and on the other hand significantly reducing the temperature of the sealing member 15 through the heat dissipation effect of the heat dissipation member 12.

[0044] In some embodiments, the connecting portion 125 can include a tapered section extending in a direction approaching the body 11 and a ring-shaped protruding section connected to the tapered section; the connecting mating portion 113 can include a tapered section extending in a direction approaching the heat dissipation member 12 and a ring-shaped recessed section connected to the tapered section, the ring-shaped protruding section of the connecting portion 125 is embedded in the ring-shaped recessed section of the connecting mating portion 113, thereby facilitating both reduction of the contact area therebetween and sealed connection therebetween.

[0045] In some embodiments, the heat dissipation member 12 can dissipate the heat of the dissolving tank 13 outward. The heat dissipation member 12 can include a plurality of heat dissipation portions to increase the heat dissipation area, thereby significantly reducing the temperature of the sealing member 15 and avoiding damage to the sealing member 15.

[0046] To reduce radioactive contamination, the radioactive sample plate needs to be dried in the dissolving tank 13 after dissolving. The inventors of the present application found that when the radioactive sample plate is dried, the temperature at the sealing member 15 is relatively high, which significantly shortens the service life of the sealing member 15. The dissolving system 10 provided by the embodiments of the present application can reduce the temperature at the sealing member 15 by providing the heat dissipation member 12, thereby avoiding the situation that the service life of the sealing member 15 is significantly shortened due to the relatively high temperature at the sealing member 15 when the radioactive sample plate is dried.

[0047] Referring to Figure 6 and Figure 7 In some embodiments, the heat dissipation member 12 can include a water-cooled heat dissipation portion 121, which can be arranged on the radial outer side of the dissolving tank 13 and used for flowing cooling water to dissipate the heat of the dissolving tank 13 outward. In some embodiments, the water-cooled heat dissipation portion 121 can include a water-cooled inlet and a water-cooled outlet. The heat dissipation member 12 can further be provided with a cooling water inlet 122 and a cooling water outlet 123, the cooling water inlet 122 is in communication with the water-cooled inlet of the water-cooled heat dissipation portion 121, and the cooling water outlet 123 is in communication with the water-cooled outlet of the water-cooled heat dissipation portion 121; cooling water can enter the water-cooled heat dissipation portion 121 through the cooling water inlet 122 and the water-cooled inlet, the cooling water entering the water-cooled heat dissipation portion 121 can exchange heat with the dissolving tank 13 to dissipate the heat of the dissolving tank 13 outward, and the cooling water after completing the heat exchange can exit the water-cooled heat dissipation portion 121 through the cooling water outlet 123 and the water-cooled outlet. In such embodiments, the heat of the dissolving tank 13 can be dissipated outward by the cooling water heat exchange. Referring to Figure 8 In some embodiments, the water-cooled heat dissipation portion 121 can be an annular water-cooled cavity.

[0048] Referring to Figure 7In some embodiments, the heat dissipation member 12 can further include an air-cooled heat dissipation part 124, which can be arranged between the dissolving tank 13 and the water-cooled heat dissipation part 121. The air-cooled heat dissipation part 124 can form a temperature gradient, by which the heat of the dissolving tank 13 can be further diffused outward. In some embodiments, the air-cooled heat dissipation part can be a heat dissipation chamber, in which cold air is arranged. The cross-sectional shape of the air-cooled heat dissipation part 124 can be "L" shape. The long side of the "L" shaped air-cooled heat dissipation part 124 can be formed on the radially inner side of the water-cooled heat dissipation part 121, and the short side of the air-cooled heat dissipation part 124 can be formed on the side of the end face of the water-cooled heat dissipation part 121 facing the dissolving tank 13. The long side and the short side of the air-cooled heat dissipation part 124 can form a temperature gradient, by which the heat of the dissolving tank 13 can be further diffused outward.

[0049] Referring to Figure 9 and Figure 10 In some embodiments, the body 11 can include two oppositely arranged first side plates 111 and two oppositely arranged second side plates 112. The width of the first side plate 111 is greater than the length of the second side plate 112.

[0050] Referring to Figure 6 and Figure 7 In some embodiments, the dissolving system 10 can further include two body heating assemblies 16, which are arranged to face the two first side plates 111 respectively, for heating the two first side plates 111. Such arrangement can make the heating area and the heat dissipation area of the body 11 larger, which is conducive to improving the heating efficiency and the heat dissipation efficiency.

[0051] Referring to Figure 6 and Figure 7 In some embodiments, the body heating assembly 16 can include a plurality of body heating members 161, a body heat conduction member 162, a body heat preservation member 163, and a body protection shell 164. The plurality of body heating members 161 are used to provide heat; the plurality of body heating members 161 are arranged in the body heat conduction member 162, the body heat conduction member 162 is used to conductively connect with the two first side plates 111, and conduct the heat provided by the body heating members 161 to the first side plates 111; the body heat preservation member 163 is arranged outside the body heat conduction member 162, for heat preservation of the body heat conduction member 162; and the body protection shell 164 is arranged outside the body heat preservation member 163, for protection of the body heat preservation member 163. In such embodiments, when the body 11 is heated, the heating efficiency and the heat preservation effect can be improved; and when the body 11 is cooled, the rapid cooling of the body 11 can be achieved.

[0052] In some embodiments, a plurality of openings can be formed on the body heat conducting member 162 along the height direction, and the plurality of body heating members 161 can be respectively embedded in one opening. In some embodiments, the joint of the body heating member 161 can be provided in a quick release form, facilitating maintenance and repair.

[0053] The body heating member 161 is, for example, an electric heating rod, the body heat conducting member 162 is, for example, graphite, and the body heat insulating member 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, and can also be used to heat the body 11 when drying radioactive sample plates.

[0055] In some embodiments, the body heating assembly 16 can heat the body 11 to a dissolution temperature of 80-90°C when dissolving radioactive substances. In some embodiments, the body heating assembly 16 can heat the body 11 to a drying temperature of 170-180°C when drying radioactive sample plates.

[0056] Referring to Figure 10 and Figure 12 In some embodiments, the two first side plates 111 of the body 11 respectively form two oppositely arranged first limiting portions 1111, and the two first limiting portions 1111 sequentially divide the dissolution tank 13 into a first zone 131, a second zone 132, and a third zone 133, which are in communication with each other. The liquid from the feed pipe 101 enters the first zone 131 and can flow to the second zone 132, the high-temperature mixed gas from the gas inlet pipe 102 enters the second zone 132, and the radioactive sample plate is arranged in the second zone 132.

[0057] Referring to Figure 6 In some embodiments, the dissolution system 10 can further include a liquid return pipe 103 and a liquid outlet pipe 104, which are respectively arranged in the third zone 133 and the first zone 131. The liquid return pipe 103 is used for flowing the liquid in the dissolution tank 13 out of the dissolution tank 13, and the liquid outlet pipe 104 is used for flowing the liquid out of the dissolution tank 13 back to the dissolution tank 13. Since the liquid return pipe 103 and the liquid outlet pipe 104 are respectively arranged in the third zone 133 and the first zone 131, the liquid in the dissolution tank 13 can flow faster between the three zones during the process of flowing out and flowing back, thereby playing a role of stirring the liquid in the dissolution tank 13 and accelerating the dissolution of the radioactive material.

[0058] In some embodiments, gaps exist between the two first limiting portions 1111 on the two first side plates 111, for the flow of the liquid sample. The gaps between the two first limiting portions 1111 are smaller than the thickness of the radioactive sample plate, so that the radioactive sample plate cannot enter the gaps. In some embodiments, the first limiting portions 1111 can be protrusions.

[0059] In some embodiments, the bottom wall of the dissolving tank 13 can form an inclined surface, and the liquid inlet of the liquid outlet pipeline 104 can be located at the lowest part of the inclined surface of the bottom wall of the dissolving tank 13, so as to facilitate the convergence of the liquid to the liquid inlet of the liquid outlet pipeline 104, and to facilitate the complete removal of the dissolved liquid after the dissolution is completed.

[0060] Referring to Figure 10 and Figure 12 In some embodiments, the two first side plates 111 of the body 11 can further form oppositely arranged second limiting portions 1112, respectively, which are located in the second area 132 and are used to limit the movement of the radioactive sample plate towards the first side plates 111, so that the radioactive sample plate can stand upright in the second area 132. In some embodiments, a gap exists between the two second limiting portions 1112 on the two first side plates 111, and the gap is larger than the thickness of the radioactive sample plate.

[0061] In some embodiments, the second limiting portions 1112 can be protrusions, and the protrusion faces form an inclined surface with the end surface of the heat dissipation member 12, so as to guide the radioactive sample plate and enable the radioactive sample plate to enter between the oppositely arranged two second limiting portions 1112.

[0062] Referring to Figure 6 and Figure 13 In some embodiments, the dissolving tank 13 can have an upper opening, and the cover member 14 is used to close the upper opening of the dissolving tank 13. The radioactive sample plate can be placed into the second area 132 from the upper opening. In some embodiments, the cover member 14 is connected with the lifting mechanism, so as to realize the overall lifting movement of the cover member 14, thereby closing or opening the upper opening of the dissolving tank 13.

[0063] Referring to Figure 6 and Figure 7 In some embodiments, the cover member 14 can include a cover plate 141 and a cover plate heating assembly 142, and the cover plate heating assembly 142 is arranged on the cover plate 141 and is used to heat the cover plate 141.

[0064] The inventor of the present application finds that there is condensate water left on the inner surface of the cover plate 141 after the drying of the radioactive sample plate is finished. Even if the drying time is prolonged, the cover plate 141 is difficult to be completely dried. This will cause radioactive contamination. The inventor of the present application further finds that this is because the cover plate 141 is located in the external environment during the drying of the radioactive sample plate. Since the cover plate 141 is usually made of metal material, the material conducts heat quickly, so the temperature of the cover plate 141 is low, which causes condensate water to be left on the inner surface of the cover plate 141 after the drying is finished.

[0065] The dissolving system 10 provided by the embodiments of the present application can heat the cover plate 141 by setting the cover plate heating assembly 142 to improve the temperature of the cover plate 141, so that the condensate water caused by the low temperature of the cover plate 141 during the drying of the radioactive sample plate can be avoided.

[0066] In some embodiments, the cover plate heating assembly 142 heats the cover plate 141 during the drying of the radioactive sample plate, and the heating temperature is less than the drying temperature to avoid adversely affecting the sealing member 15. The heating temperature of the cover plate heating assembly 142 may, for example, be 110-120°C.

[0067] Referring to Figure 7 and Figure 12 In some embodiments, the cover plate heating assembly 142 can include a cover plate heating member 1421, a cover plate heat conduction member 1422, a cover plate heat preservation member 1424, and a cover plate protection shell 1423. The cover plate heating member 1421 is used to provide heat; the cover plate heat conduction member 1422 is in thermal conduction connection with the cover plate 141 and is used to conduct the heat provided by the cover plate heating member 1421 to the cover plate 141; the cover plate heat preservation member 1424 is arranged outside the cover plate heat conduction member 1422 and is used to preserve the heat of the cover plate heat conduction member 1422; and the cover plate protection shell 1423 is arranged outside the cover plate heat preservation member 1424 and is used to protect the cover plate heat preservation member 1424. The cover plate heating member 1421 may, for example, be an electric heating rod. The material of the cover plate heat conduction member 1422 may, for example, be graphite.

[0068] In some embodiments, a plurality of openings can be formed on the cover plate heat conduction member 1422 in the height direction, and a plurality of cover plate heating members 1421 can be respectively embedded in one opening. In some embodiments, the cover plate heating assembly 142 can further include a temperature measuring member arranged in the cover plate heat conduction member 1422 and used to detect the temperature of the cover plate heat conduction member 1422.

[0069] Referring to Figure 6 , Figure 7 and Figure 11In some embodiments, the dissolving system 10 can further comprise a gas cooling assembly 17 for diffusing the heat of the body 11 outward. The gas cooling assembly 17 comprises an air inlet pipe 171, an air outlet pipe 172 and a cooling gas pipe 173. The air inlet pipe 171 is arranged at one end of the body heat preservation member 163 away from the heat dissipation member 12, the air outlet pipe 172 is arranged at one end of the body heat preservation member 163 close to the heat dissipation member 12, and the cooling gas pipe 173 is arranged inside the body heat preservation member 163. The air inlet pipe 171 is connected with the cooling gas pipe 173 and is in fluid communication with the cooling gas pipe 173, so that the gas can flow into the cooling gas pipe 173 through the air inlet pipe 171. The cooling gas pipe 173 is formed with a plurality of through holes, so that the gas entering the cooling gas pipe 173 can flow out of the cooling gas pipe 173 through the through holes and dissipate heat with the body 11, so as to diffuse the heat of the body 11 outward. The gas after completing heat dissipation can flow out of the gas cooling assembly 17 through the air outlet pipe 172. Such arrangement can facilitate further rapid heat dissipation of the body 11 by heat exchange between the gas and the body 11.

[0070] After completing a dissolving process, the temperature of the dissolving tank 13 is relatively high because the body heating assembly 16 heats the body 11 during the dissolving process and dries the radioactive sample plate. During the process of introducing the acidic solution into the dissolving tank 13 under negative pressure for the next dissolving, the acidic solution vaporizes to form acidic gas due to the high temperature in the dissolving tank 13. The acidic gas is sucked away under the negative pressure environment and cannot be recovered.

[0071] In order to shorten the time interval between two dissolving processes and avoid the vaporization of the acidic solution to generate acidic gas under high temperature when the acidic solution is added next time, the dissolving system 10 provided by the embodiments of the present application is arranged with the gas cooling assembly 17, which facilitates further rapid heat dissipation of the body 11 by heat exchange between the gas and the body 11. After the temperature of the body 11 is reduced to a suitable temperature, the acidic solution is introduced into the dissolving tank 13 under negative pressure, which can avoid the vaporization of the acidic solution due to high temperature.

[0072] Referring to Figure 11 In some embodiments, the body heat preservation member 163 can comprise a heat preservation body 1631 and a plurality of partition plates 1632 connected with the heat preservation body 1631, and the plurality of partition plates 1632 and the heat preservation body 1631 jointly form a plurality of heat dissipation channels 1633. In some embodiments, the cooling gas pipe 173 is in fluid communication with the heat dissipation channels 1633, so that the gas entering the cooling gas pipe 173 can enter the heat dissipation channels 1633 through the through holes. The heat dissipation channels 1633 are also in fluid communication with the air outlet pipe 172, so that the gas entering the heat dissipation channels 1633 can flow out through the air outlet pipe 172.

[0073] Referring to Figure 6In some embodiments, the dissolving system 10 can further comprise a gas suction pipe 105 and a vacuum pipe 106, which are in fluid communication with the dissolving tank 13; the gas in the dissolving tank 13 can flow out of the dissolving tank 13 through the gas suction pipe 105, so that a negative pressure environment is formed in the dissolving tank 13; the vacuum pipe 106 is also in fluid communication with the glove box, and the gas in the glove box can enter the dissolving tank 13 through the vacuum pipe 106, so that the dissolving tank 13 changes from a negative pressure environment to a normal pressure environment. In some embodiments, the gas suction pipe 105 and the vacuum pipe 106 can be arranged on the heat dissipation member 12.

[0074] Referring to Figure 12 In some embodiments, the dissolving system 10 further comprises two side heat preservation members 108, which are fixedly arranged on the two second side plates 112 respectively, for heat preservation of the second side plates 112. Since the length of the second side plates 112 is smaller than the length of the first side plate 111, the side heat preservation members 108 have little influence on heat dissipation of the body 11.

[0075] Referring to Figure 6 In some embodiments, the dissolving system 10 can further comprise a side protection shell 109 arranged outside the side heat preservation members 108, for protection of the side heat preservation members 108.

[0076] Referring to Figure 7 In some embodiments, the dissolving system 10 can further comprise a bottom heat preservation member 107 arranged at the bottom of the body 11, for heat preservation of the dissolving tank 13.

[0077] In some embodiments, the high-temperature mixed gas can be a mixed gas of nitrogen and water vapor. Referring to Figure 1 In some embodiments, the gas supply system 40 can comprise a preheating member 41 and a high-temperature mixed gas generating member 42.

[0078] The preheating member 41 is used for preheating nitrogen, and the preheating member 41 is in fluid communication with the high-temperature mixed gas generating member 42, so that the preheated nitrogen can flow from the preheating member 41 into the high-temperature mixed gas generating member 42.

[0079] The high-temperature mixed gas generating member 42 comprises a liquid inlet pipe 424 for external liquid water to enter the high-temperature mixed gas generating member 42, and the liquid water and the preheated nitrogen can be heated in the high-temperature mixed gas generating member 42 to obtain a high-temperature mixed gas; the high-temperature mixed gas generating member can further comprise a gas outlet pipe 423, which is in communication with the gas inlet pipe 102, so that the high-temperature mixed gas can enter the dissolving tank 13 through the gas outlet pipe 423 and the gas inlet pipe 102. In such embodiments, preheating of nitrogen by the preheating member 41 can reduce the heating time required for generating the high-temperature mixed gas, and improve the generation rate of the high-temperature mixed gas.

[0080] Referring toFigure 2 In some embodiments, the high-temperature mixed gas generating component 42 can include a body 421, an inlet gas pipeline 422, an exhaust pipeline 425, and a body heating component 426. The body 421 is formed with a space for heating mixed gas, the body 421 is in communication with a liquid inlet pipeline 424 through which liquid water can flow into the body 421, the inlet gas pipeline 422 is in fluid communication with the body 421 and the preheating component 41, and preheated nitrogen gas can flow into the body 421 through the inlet gas pipeline 422, the exhaust pipeline 425 is in fluid communication with the body 421 for discharging excess gas in the body 421 to regulate the pressure in the body 421 and avoid safety risks caused by excessively high pressure in the body 421, and the body heating component 426 is used to heat the body 421.

[0081] Referring to Figure 2 In some embodiments, the inlet gas pipeline 422, the outlet gas pipeline 423, the liquid inlet pipeline 424, the exhaust pipeline 425, and the body heating component 426 are all arranged in the body 421. The body heating component 426 is, for example, an electric heating rod.

[0082] Referring to Figure 2 In some embodiments, the high-temperature mixed gas generating component 42 can further include a temperature monitoring component 427 and a pressure monitoring component 428, both of which are arranged in 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 component 427 is, for example, a K-type thermocouple temperature transmitter, and the pressure monitoring component 428 is, for example, a high-temperature resistant pressure transmitter.

[0083] Referring to Figure 3 , Figure 4 and Figure 5 In some embodiments, the preheating component 41 can include a preheating pipeline 411, a preheating pipeline heating component 412, a preheating pipeline heat conducting component 413, and a preheating pipeline protective shell 417. The preheating pipeline 411 is arranged to form a space for preheating nitrogen gas, the preheating pipeline heating component 412 is used to provide heat, a plurality of preheating pipeline heating components 412 are arranged in the preheating pipeline heat conducting component 413, the preheating pipeline heat conducting component 413 is used to conductively connect with the preheating pipeline 411 to conduct the heat provided by the preheating pipeline heating component 412 to the preheating pipeline 411, and the preheating pipeline protective shell 417 is arranged outside the preheating pipeline heat conducting component 413 to protect the preheating pipeline heat conducting component 413.

[0084] In some embodiments, a preheating pipeline insulation component is further arranged between the preheating pipeline heat conducting component 413 and the preheating pipeline protective shell 417 to insulate the preheating pipeline heat conducting component 413. The preheating pipeline insulation component is, for example, thermal insulation cotton.

[0085] Referring to Figure 5In some embodiments, the preheating member 41 can further include an inlet pipe 414, an outlet pipe 415, and a mounting pipe 416. The inlet pipe 414 and the outlet pipe 415 are connected to the preheating pipe 411, nitrogen can enter the preheating pipe 411 through the inlet pipe 414, and the preheated nitrogen can flow out of the preheating pipe 411 through the outlet pipe 415 and flow into the high-temperature mixed gas generating member 42; the mounting pipe 416 is connected to the outlet pipe 415, and is used for mounting a nitrogen temperature monitoring member, such as a thermocouple, to monitor the temperature of the preheated nitrogen.

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

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

[0088] For the embodiments of the present application, it should also be noted that the embodiments and features in the embodiments of the present application can be combined with each other to obtain new embodiments without conflict.

[0089] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A radioactive material dissolution apparatus, wherein the radioactive material is collected on a radioactive sample plate, characterized in that, The device comprises: a dissolving system configured to dissolve radioactive materials; a feeding system configured to add a solution for dissolving the radioactive materials into the dissolving system; a gas supply system configured to supply high-temperature mixed gas to the dissolving system to oxidize the radioactive materials; wherein the dissolving system comprises a body for the radioactive materials, a heat dissipation member connected to the body, and a cover member for closing or opening the body, a seal is formed between the cover member and the heat dissipation member, and the heat dissipation member is configured to dissipate heat of the body outward; an end of the heat dissipation member facing the body forms a connecting portion, and an end of the body facing the heat dissipation member forms a connecting fitting portion, the thickness of the connecting portion is smaller than the thickness of other parts of the heat dissipation member; the thickness of the connecting fitting portion is smaller than the thickness of other parts of the body, so as to reduce heat conduction between the two; wherein the body comprises two first side plates arranged oppositely and two second side plates arranged oppositely, the width of the first side plate is greater than the length of the second side plate; the body forms a dissolving tank for accommodating the radioactive sample plate; the two first side plates of the body respectively form two first limiting portions arranged oppositely, the two first limiting portions 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 in communication with each other; the two first side plates of the body respectively form two second limiting portions arranged oppositely, the two second limiting portions are located in the second area and are used to limit the movement of the radioactive sample plate towards the first side plate.

2. The apparatus of claim 1, wherein, The dissolving system further comprises: a feeding pipeline configured to fluidly connect the feeding system and the dissolving tank, so as to add the solution for dissolving the radioactive materials into the dissolving tank; an air inlet pipeline configured to fluidly connect the gas supply system and the dissolving tank, so as to supply the high-temperature mixed gas into the body; the feeding pipeline and the air inlet pipeline are configured to supply the high-temperature mixed gas into the dissolving tank first, and then add the solution into the dissolving tank.

3. The apparatus of claim 2, wherein, The heat dissipation member can dissipate heat of the dissolving tank outward, the heat dissipation member comprises a plurality of heat dissipation portions to increase the heat dissipation area.

4. The apparatus of claim 3, wherein, The heat dissipation member comprises a water-cooled heat dissipation portion, the water-cooled heat dissipation portion is arranged on the radial outer side of the dissolving tank, and is used for flowing cooling water to dissipate heat of the dissolving tank outward.

5. The apparatus of claim 4, wherein, The heat dissipation member further comprises an air-cooled heat dissipation portion, the air-cooled heat dissipation portion is arranged between the dissolving tank and the water-cooled heat dissipation portion, a temperature gradient can be formed at the air-cooled heat dissipation portion, and the heat of the dissolving tank can be further dissipated outward through the temperature gradient.

6. The device according to claim 3, wherein the dissolving system further comprises two body heating assemblies, the two body heating assemblies are respectively arranged opposite to the two first side plates, and are used for heating the two first side plates.

7. The device according to claim 6, wherein The feed liquid from the feed pipe enters the first zone and can flow to the second zone, the high-temperature mixed gas from the gas inlet pipe enters the second zone, the radioactive sample plate is arranged in the second zone, The dissolving system further comprises a liquid return pipe and a liquid outlet pipe, the liquid return pipe and the liquid outlet pipe are arranged in the third zone and the first zone respectively, The liquid return pipe is used for flowing the liquid in the dissolving tank out of the dissolving tank, and the liquid outlet pipe is used for flowing the liquid out of the dissolving tank back to the dissolving tank.

8. The apparatus of claim 1, wherein, The cover comprises: A cover plate and a cover plate heating assembly, the cover plate heating assembly is arranged on the cover plate and is used for heating the cover plate.

Images