Radioactive substance dissolving system and device for measuring concentration of radioactive substance by using X-ray fluorescence

Abstract

The embodiment of the invention relates to the technical field of radioactive substance analysis, in particular to a radioactive substance dissolving system and a device for measuring the concentration of radioactive substances through X-ray fluorescence. The device comprises a plurality of fluid receiving pieces which are respectively used for receiving fluid carrying radioactive substances, and each fluid receiving piece is provided with a window for X-rays to penetrate through; the measuring part is used for measuring the intensity of X-ray fluorescence formed after the radioactive substance is irradiated by the X-ray, so that the concentration of the radioactive substance is determined according to the intensity of the X-ray fluorescence; and the moving part is arranged to enable the plurality of fluid receiving parts to move relative to the measuring part, so that the measuring part can measure the concentration of the radioactive substance in each fluid receiving part. According to the embodiment of the invention, the windows of the different fluid receiving pieces are sequentially opposite to the measuring piece through the moving piece, so that the same measuring piece is used for respectively measuring the concentrations of the radioactive substances in a plurality of pipelines.

Description

Technical Field

[0001] The present application relates to the technical field of radioactive material analysis, and in particular to a radioactive material dissolution system and a device for measuring the concentration of radioactive material using X-ray fluorescence. Background Art

[0002] When analyzing the composition of radioactive materials, the radioactive materials can be dissolved by using a dissolving device. A radioactive plate sample containing radioactive materials can be placed in the dissolving device, and a liquid capable of dissolving the radioactive materials can be added to the dissolving device to dissolve the radioactive materials.

[0003] Currently, when radioactive materials are dissolved in a dissolution device, it is impossible to accurately analyze the composition of the radioactive materials and determine the degree of dissolution of the radioactive materials in the dissolution device because it is impossible to observe with the naked eye. Summary of the invention

[0004] 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.

[0005] In a first aspect, an embodiment of the present application provides a device for measuring the concentration of a radioactive substance using X-ray fluorescence, comprising: a plurality of fluid receiving components, each for receiving a fluid carrying a radioactive substance, the fluid receiving components having a window for allowing X-rays to pass through; a measuring component, for measuring the intensity of X-ray fluorescence formed after the radioactive substance is irradiated with X-rays, thereby determining the concentration of the radioactive substance based on the intensity of the X-ray fluorescence; and a moving component, configured to enable the plurality of fluid receiving components to move relative to the measuring component, so that the measuring component can measure the concentration of the radioactive substance in each fluid receiving component.

[0006] The device for measuring the concentration of radioactive substances using X-ray fluorescence provided in the embodiment of the present application can lead out the dissolving liquid in the dissolving device through the fluid receiving part, so as to determine the degree of dissolution of the radioactive substance by measuring the radioactivity of the dissolving liquid. The embodiment of the present application can use multiple fluid receiving parts to respectively receive the fluids carrying radioactive substances in multiple pipelines, and then use the moving parts to sequentially align the windows of different fluid receiving parts with the measuring parts, so as to achieve the purpose of measuring the concentration of radioactive substances in multiple pipelines by the same measuring part, and the measurement efficiency is high. At the same time, the use of multiple fluid receiving parts to respectively receive the fluids carrying radioactive substances can also avoid mutual contamination between the fluids carrying radioactive substances, resulting in inaccurate measurements.

[0007] In a second aspect, an embodiment of the present application further provides a radioactive material dissolution system, which may include: a plurality of dissolution devices and a device for measuring the concentration of radioactive material using X-ray fluorescence according to the first aspect of the present application. Each dissolution device is configured to provide a dissolution space for the radioactive material; the device for measuring the concentration of radioactive material using X-ray fluorescence is configured to measure the concentration of radioactive material in the dissolution solution of the plurality of dissolution devices.

[0008] These and other advantages of the present application will become more apparent through the following detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to further illustrate the above and other advantages and features of the present application, the specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. The accompanying drawings together with the following detailed description are included in this specification and form a part of this specification. Elements with the same function and structure are represented by the same reference numerals. It should be understood that these drawings only describe typical examples of the present application and should not be regarded as limiting the scope of the present application.

[0010] Figure 1 is a schematic structural diagram of a concentration measurement device according to an embodiment of the present application;

[0011] Figure 2 yes Figure 1 A cross-sectional view of the concentration measuring device shown;

[0012] Figure 3 It is a structural schematic diagram of a measurement component and a fluid receiving component of a concentration measurement device according to an embodiment of the present application being assembled on a mounting component;

[0013] Figure 4 is a schematic structural diagram of a fluid receiving member according to an embodiment of the present application;

[0014] Figure 5 yes Figure 4 The structure diagram of the fluid receiving member shown is a schematic diagram after the panel is omitted;

[0015] Figure 6 yes Figure 5 A cross-sectional view of the fluid receiving member shown;

[0016] Figure 7 is a schematic diagram of the structure of a dissolving device provided in an embodiment of the present application;

[0017] Figure 8 yes Figure 7 A cross-sectional schematic diagram of a dissolution device is shown;

[0018] Fig. 9 yes Figure 7 A cross-sectional schematic diagram of another angle of the dissolving device is shown;

[0019] Fig.10 yes Figure 7 The dissolving device is shown as a top view without the cover;

[0020] Fig.11 yes Fig.10 The dissolution device shown is a top view schematic diagram after omitting the heat sink;

[0021] Fig.12 yes Figure 7 A schematic diagram of the structure consisting of a main body heat-insulating component and an air-cooling component of the dissolving device is shown;

[0022] Fig.13 yes Figure 7 A cross-sectional schematic diagram of another angle of the dissolving device is shown;

[0023] Fig.14 yes Figure 7 The schematic diagram of the structure of the dissolving device is shown after the cover of the dissolving device opens the upper opening of the dissolving tank.

[0024] 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.

[0025] Description of reference numerals:

[0026] 210, fluid receiving member; 211, window; 212, accommodating chamber; 213, liquid inlet pipe; 214, liquid outlet pipe; 215, exhaust pipe; 216, body; 2161, receiving groove; 2162, through hole; 2163, first connecting channel; 2164, second connecting channel; 2165, mounting groove; 2166, panel;

[0027] 220, measuring element; 221, X-ray emitting element; 222, X-ray receiving element;

[0028] 230, moving part; 231, driving part; 233, screw rod; 234, threaded fitting part;

[0029] 240, bearing base plate;

[0030] 250, mounting member; 251, first channel; 252, second channel;

[0031] 10. Dissolving device;

[0032] 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;

[0033] 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;

[0034] 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;

[0035] 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 component; 108. Side insulation component; 109. Side protective shell. DETAILED DESCRIPTION

[0036] 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.

[0037] 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.

[0038] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in this application should have the common meanings understood by persons with ordinary skills in the field to which this application belongs.

[0039] In the description of the embodiments of the present application, “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] The embodiments of the present application provide a device for measuring the concentration of radioactive substances using X-ray fluorescence (hereinafter referred to as a concentration measuring device). Figure 1As shown, the concentration measuring device according to the embodiment of the present application may include: a plurality of fluid receiving parts 210 , a measuring part 220 and a moving part 230 .

[0041] In some embodiments, a plurality of fluid receiving parts 210 may be used to receive fluids carrying radioactive substances. The fluid receiving part 210 may have a window 211 for X-rays to pass through. The measuring part 220 may be used to measure the intensity of X-ray fluorescence formed by the radioactive substance after being irradiated by X-rays, thereby determining the concentration of the radioactive substance according to the intensity of the X-ray fluorescence. The moving part 230 may be configured to enable the plurality of fluid receiving parts 210 to move relative to the measuring part 220, so that the measuring part 220 can measure the concentration of the radioactive substance in each fluid receiving part 210.

[0042] The concentration measuring device provided in the embodiment of the present application can lead out the dissolving liquid in the dissolving device through the fluid receiving part 210, so as to determine the degree of dissolution of the radioactive substance by measuring the radioactivity of the dissolving liquid. The embodiment of the present application can use multiple fluid receiving parts 210 to respectively receive the fluid carrying the radioactive substance in multiple pipelines, and then use the moving part 230 to sequentially make the windows 211 of different fluid receiving parts 210 face the measuring part 220, so as to achieve the purpose of measuring the concentration of the radioactive substance in multiple pipelines by the same measuring part 220, and the measurement efficiency is high. At the same time, using multiple fluid receiving parts 210 to respectively receive the fluid carrying the radioactive substance can also avoid mutual contamination between the fluid carrying the radioactive substance, resulting in inaccurate measurement.

[0043] For different elements, they will form corresponding characteristic X-ray fluorescence after being irradiated by X-rays, and the intensity of the X-ray fluorescence is positively correlated with the concentration of the element. Therefore, when the X-rays pass through the window 211, the measuring element 220 can determine the concentration of the radioactive substance according to the intensity of the X-ray fluorescence formed after the X-rays pass through the window 211.

[0044] In some embodiments, if the concentration of the radioactive material carried in the current fluid receiving component 210 is measured, the moving component 230 can be used to move the next fluid receiving component 210 to the position where the current fluid receiving component 210 is located, so as to measure the concentration of the radioactive material carried in the next fluid receiving component 210. In some embodiments, the moving component 230 can be implemented by a slide rail or a conveyor belt.

[0045] In some embodiments, Figure 6 As shown, the window 211 on the fluid receiving member 210 can be a circular window or a rectangular window, etc. In the embodiment of the present application, the window 211 is a circular window.

[0046] In some embodiments, the window 211 may be made of polytetrafluoroethylene. Since the polytetrafluoroethylene material can be made very thin, it is beneficial to measure the intensity of X-ray fluorescence. In some embodiments, the thickness of the window 211 may be 0.1-0.2 mm. Since the intensity of X-ray fluorescence is related to the concentration of the radioactive substance and has nothing to do with the length of the path that the X-ray passes through the window 211, although the thinner polytetrafluoroethylene material may be deformed during use, it does not affect the measurement result.

[0047] In some embodiments, Figure 1 and Figure 2 As shown, the measuring member 220 may include an X-ray emitting member 221 and an X-ray receiving member 222. The X-ray emitting member 221 and the X-ray receiving member 222 may be disposed on a side of the plurality of fluid receiving members 210 where the window 211 is disposed. The X-ray emitting member 221 may be used to emit X-rays to the window 211 of the fluid receiving member 210. The X-ray receiving member 222 may be used to receive X-ray fluorescence transmitted through the window 211. The moving member 230 may be configured to enable the plurality of fluid receiving members 210 to move relative to the X-ray emitting member 221 and the X-ray receiving member 222, so that the window 211 of each fluid receiving member 210 can face the X-ray emitting member 221 and the X-ray receiving member 222 at the same time.

[0048] The embodiment of the present application utilizes the X-ray emitting element 221 and the X-ray receiving element 222 to quickly obtain the intensity of the X-ray fluorescence after passing through the window 211. In this way, the concentration of the radioactive substance can be determined based on the intensity of the X-ray fluorescence after the X-ray passes through the window 211 without the need for other complex measuring devices, and the efficiency can be further measured.

[0049] It is easy to understand that the X-ray emitting element 221 has an emitting window for emitting X-rays, and the X-ray receiving element 222 has a receiving window for receiving X-rays. The emitting window of the X-ray emitting element 221 and the receiving window of the X-ray receiving element 222 both face the window 211, so that the X-rays emitted from the emitting window can pass through the window 211 into the interior of the fluid receiving element 210, and the X-ray fluorescence emitted from the window 211 can enter the receiving window.

[0050] In some embodiments, the plurality of fluid receiving elements 210 may be arranged along the first horizontal direction, and the window 211 of each fluid receiving element 210 is parallel to the first horizontal direction. The X-ray emitting element 221 may be disposed below the X-ray receiving element 222 .

[0051] In some embodiments, the concentration measuring device may further include a mounting member 250. The fluid receiving member 210, the X-ray emitting member 221, and the X-ray receiving member 222 are mounted on the mounting member 250. Figure 2The mounting member 250 may be provided with two channels formed to form a first channel 251 and a second channel 252. One end of the first channel 251 and the second channel 252 are connected, and the two channels are arranged at an acute angle so as to face the window 211 at the same time. The first channel 251 is used to connect the emission window of the X-ray emitting member 221 and the window 211, and the second channel 252 is used to connect the receiving window of the X-ray receiving member 222 and the window 211.

[0052] In some embodiments, again referring to Figure 1 and Figure 2 As shown, the moving member 230 may further include a bearing base plate 240 , and the mounting member 250 is mounted on the bearing base plate 240 .

[0053] In some embodiments, Figures 1 to 5 As shown, the fluid receiving member 210 may include a receiving chamber 212, a liquid inlet pipe 213, and a liquid outlet pipe 214. The receiving chamber 212 may be used to receive a fluid. The window 211 may be used to seal the receiving chamber 212. The liquid inlet pipe 213 may be used to provide a fluid to the receiving chamber 212, and the liquid outlet pipe 214 may be used to allow the fluid in the receiving chamber 212 to flow out. The liquid inlet pipe 213 may be in fluid communication with a liquid outlet pipeline of the dissolving device, and the liquid outlet pipe 214 may be in fluid communication with a liquid return pipeline of the dissolving device, so as to perform online measurement of the radioactivity of the dissolved liquid of the dissolving device.

[0054] The experiment found that the fluid receiving part 210 of the above structure has a large measurement error. The inventor of the present application found that this is because when the fluid to be measured is pumped into the accommodating chamber 212 by the pumping device, small bubbles will inevitably be carried in the fluid, and the presence of bubbles affects the accuracy of the measurement. Therefore, in some embodiments, the fluid receiving part 210 may also include an exhaust pipe 215. The exhaust pipe 215 may be in fluid communication with the liquid inlet pipe 213. The exhaust pipe 215 may be used to allow the gas in the liquid inlet pipe 213 to flow out. The embodiment of the present application, by setting the fluid receiving part 210 to include an exhaust pipe 215, uses the exhaust pipe 215 to allow the gas in the liquid inlet pipe 213 to flow out, and can avoid sending the bubbles carried by the fluid to the corresponding accommodating chamber 212 together, thereby improving the measurement accuracy of the concentration of the radioactive substance.

[0055] In some embodiments, the liquid inlet pipe 213, the liquid outlet pipe 214 and the exhaust pipe 215 can all be made of polytetrafluoroethylene material to reduce the adsorption of radioactive substances in the pipes.

[0056] In an embodiment of the present application, the concentration measuring device of radioactive substances may further include a peristaltic pump. The peristaltic pump may be used to extract fluid so that the fluid may enter the accommodating chamber 212 of the fluid receiving member 210 via the liquid inlet pipe 213 and flow out of the accommodating chamber 212 via the liquid outlet pipe 214. In this way, it is ensured that the extraction speed of the fluid is more accurately controlled without the peristaltic pump directly contacting the fluid carrying the radioactive substance, so as to improve the safety of the overall operation.

[0057] In some embodiments, Figure 5 As shown, the exhaust pipe 215 is coaxially arranged with the liquid inlet pipe 213, wherein the exhaust pipe 215 is arranged above the liquid inlet pipe 213. Thus, during the liquid inlet process, the gas can rise into the exhaust pipe 215 under the action of buoyancy and separate from the liquid, thereby preventing the gas from entering the containing chamber 212 and affecting the measurement result.

[0058] In some embodiments, the fluid receiving member 210 may further include a body 216. Figure 2 The body 216 may be formed with a receiving groove 2161 extending in a first direction, a through hole 2162 penetrating the body 216 in a second direction, a first connecting channel 2163 connecting the receiving groove 2161 and the through hole 2162, and a second connecting channel 2164 communicating with the receiving groove 2161. The receiving groove 2161 has an opening in the first direction. The window 211 may be sealingly disposed on one side of the opening of the receiving groove 2161 to form a receiving chamber 212 together with the receiving groove 2161. The second connecting channel 2164 may be in fluid communication with the liquid outlet pipe 214. The upper end of the through hole 2162 may be in fluid communication with the exhaust pipe 215. The lower end of the through hole 2162 may be in fluid communication with the liquid inlet pipe 213.

[0059] In the embodiment of the present application, the fluid receiving member 210 can quickly receive or discharge radioactive substances through the receiving groove 2161, the through hole 2162, the first connecting channel 2163 and the second connecting channel 2164 formed in the body 216. At the same time, during the flow of the radioactive substances that have entered the liquid inlet pipe 213, bubbles can be continuously discharged from the exhaust pipe 215, so that the gas is discharged in time before the fluid enters the containing chamber 212, so as to avoid the gas entering the containing chamber 212 and affecting the measurement results.

[0060] In some embodiments, the first connecting channel 2163 extends in a horizontal direction. The first direction and the second direction may be perpendicular to each other and both perpendicular to the extending direction of the first connecting channel 2163, thereby facilitating timely discharge of gas before the fluid enters the accommodating cavity.

[0061] In some embodiments, the first direction may extend in a horizontal direction, and the first direction may be perpendicular to the arrangement direction of the plurality of fluid receiving members 210. The second direction may be a vertical direction, which is conducive to timely discharge of gas before the fluid enters the receiving cavity.

[0062] In some embodiments, the body 216 may be removably connected to the mounting member 250 via fasteners.

[0063] In some embodiments, there are two fluid receiving members 210. The bodies 216 of the two fluid receiving members 210 are integrally formed, which facilitates the overall disassembly of the fluid receiving members 210.

[0064] In some embodiments, reference Figures 4 to 6 The fluid receiving member 210 may further include a panel 2166 and a window film. A mounting groove 2165 may be formed on the body 216. The panel 2166 is embedded in the mounting groove 2165, and the panel 2166 is mounted in the mounting groove 2165 by a fastener. A panel opening is formed on the panel 2166, and the window film is disposed between the panel opening and the accommodating cavity 212. The size of the panel opening may be the same as the size of the accommodating cavity 212.

[0065] In some embodiments, the body 216 can be made of corrosion-resistant material. In some embodiments, the panel 2166 can be made of stainless steel. In some embodiments, the window film can be made of polytetrafluoroethylene to reduce the absorption of X-rays.

[0066] It is easy to understand that the portion of the window film corresponding to the receiving groove 2161 forms the window 211 .

[0067] Since polytetrafluoroethylene is easily deformed, in order to ensure the sealing of the opening of the receiving groove 2161, in some embodiments, the fluid receiving member 210 may further include a plurality of sealing rings, and the mounting groove 2165 of the body 216 forms a plurality of receiving grooves corresponding to the position of the receiving cavity 212, each sealing ring is arranged in a receiving groove, and the panel 2166 and the window film are pressed and sealed with the receiving cavity 212 through a sealing gasket. The sealing ring may be a fluororubber sealing ring.

[0068] In some embodiments, see Figure 3 The concentration measuring device may include a driving unit 231. The driving unit 231 may be used to drive the moving member 230 to move. Thus, the fluid receiving member 210 may be moved by the driving unit 231, so that the concentration of the radioactive material carried by each of the plurality of fluid receiving members 210 may be measured by the measuring member 220.

[0069] In some embodiments, the driving unit 231 may include a stepping motor and a screw rod 233. The screw rod 233 may be provided with threads. Figure 3The moving member 230 may be provided with a threaded fitting portion 234. The stepping motor may drive the screw rod 233 to rotate, and through the threaded fitting between the screw rod 233 and the threaded fitting portion 234, the moving member 230 may be driven to move, thereby driving the plurality of fluid receiving members 210 to move.

[0070] The embodiment of the present application also provides a radioactive material dissolution system, which may include: a plurality of dissolution devices and a radioactive material concentration measuring device of any embodiment of the present application. Each dissolution device is configured to provide a dissolution space for the radioactive material; the radioactive material concentration measuring device is configured to measure the concentration of the radioactive material in the dissolution liquid of the plurality of dissolution devices.

[0071] See also Figure 7 The dissolution device 10 provided in the embodiment of the present application may include a main body 11 for dissolving radioactive materials, a heat sink 12 connected to the main body 11, and a cover 14 for closing or opening the main body 11. A seal 15 is formed between the cover 14 and the heat sink 12. The heat sink 12 is configured to diffuse the heat of the main body 11 outward.

[0072] The dissolving device 10 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 .

[0073] In some embodiments, the liquid added to the dissolving device 10 for dissolving the radioactive material may be an acidic solution, such as nitric acid and hydrofluoric acid. In some embodiments, the dissolving device 10 may be disposed in a glove box.

[0074] 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.

[0075] 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 .

[0076] See also Figure 7 and Figure 8 In some embodiments, the body 11 may form a dissolving tank 13 for accommodating a radioactive sample plate. In some embodiments, the dissolving device 10 may further include a feed pipeline 101 and an air intake pipeline 102. The feed pipeline 101 is configured to connect the feeding system with the dissolving tank 13 so as to add liquid for dissolving radioactive materials into the dissolving tank 13; the air intake pipeline 102 is configured to connect the gas supply system with the dissolving tank 13 so as to connect the two so as to introduce a high-temperature mixed gas into the body 11.

[0077] In some embodiments, the dissolving device 10 may further include a pressure measuring device for monitoring the pressure in the dissolving tank 13. In some embodiments, a high-temperature mixed gas is introduced into the dissolving tank 13 through the air inlet line 102 under negative pressure.

[0078] See also Figure 8 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.

[0079] 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.

[0080] 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 improve the heat dissipation effect, which can significantly reduce the temperature of the sealing member 15 and prevent the sealing member 15 from being damaged.

[0081] 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 device 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.

[0082] See also Figure 8In 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. Fig. 9 In some embodiments, the water-cooling heat dissipation portion 121 may be an annular water-cooling cavity.

[0083] See also Figure 7 In 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.

[0084] See also Fig.10 and Fig.11 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 .

[0085] See also Figure 7 and Figure 8 In some embodiments, the dissolving device 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, for heating 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.

[0086] See also Figure 7 and Figure 8 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] See also Fig.11 and Fig.13In 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.

[0092] See also Figure 7 In some embodiments, the dissolving device 10 may further include a liquid return pipeline 103 and a liquid outlet pipeline 104, which are respectively arranged in the third area 133 and the first area 131, and the liquid return pipeline 103 is used to supply the liquid in the dissolving tank 13 to flow out of the dissolving tank 13, and the liquid outlet pipeline 104 is used to supply the liquid flowing out of the dissolving tank 13 to flow back to the dissolving tank 13. Since the liquid return pipeline 103 and the liquid outlet pipeline 104 are respectively arranged in the third area 133 and the first area 131, after the liquid in the dissolving 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 dissolving tank 13, and accelerating the dissolution of the radioactive material.

[0093] 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.

[0094] 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.

[0095] See also Fig.11 and Fig.13 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.

[0096] 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 .

[0097] See also Figure 7 and Fig.14 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.

[0098] See also Figure 7 and Figure 8 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 .

[0099] 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.

[0100] The dissolution device 10 provided in the embodiment of the present application heats the cover plate 141 by arranging 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.

[0101] 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.

[0102] See also Figure 8 and Fig.13In 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.

[0103] 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.

[0104] See also Figure 7 , Figure 8 as well as Fig.12 In some embodiments, the dissolving device 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 .

[0105] 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.

[0106] 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 device 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.

[0107] See also Fig.12 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.

[0108] See also Figure 7 In some embodiments, the dissolving device 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 dissolving tank 13; the gas in the dissolving tank 13 may flow out of the dissolving tank 13 through the exhaust pipe 105, so that a negative pressure environment is formed in the dissolving 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 dissolving tank 13 through the piercing pipe 106, so that the dissolving 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.

[0109] See also Fig.13 In some embodiments, the dissolving device 10 further includes two side heat-insulating members 108, which are respectively fixed to the two second side plates 112 for heat-insulating the second side plates 112. Since the length of the second side plates 112 is less than the length of the first side plates 111, the side heat-insulating members 108 have little effect on the heat dissipation of the body 11.

[0110] See also Figure 7 In some embodiments, the dissolving device 10 may further include a side protective shell 109 disposed on the outside of the side heat-insulating member 108 to protect the side heat-insulating member 108 .

[0111] See also Figure 8 In some embodiments, the dissolving device 10 may further include a bottom insulation member 107 disposed at the bottom of the body 11 for insulating the dissolving tank 13 .

[0112] 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.

[0113] 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 device for measuring the concentration of radioactive substances using X-ray fluorescence, characterized in that: include: A plurality of fluid receiving parts, each used to receive a fluid carrying a radioactive substance, wherein the fluid receiving parts have a window for X-rays to pass through; a measuring member, used to measure the intensity of X-ray fluorescence formed by the radioactive substance after being irradiated with X-rays, so as to determine the concentration of the radioactive substance according to the intensity of the X-ray fluorescence; as well as The moving member is configured to enable the plurality of fluid receiving members to move relative to the measuring member, so that the measuring member can measure the concentration of the radioactive substance in each of the fluid receiving members.

2. The device according to claim 1, characterized in that The measuring element comprises an X-ray emitting element and an X-ray receiving element, wherein the X-ray emitting element and the X-ray receiving element are arranged on one side of the plurality of fluid receiving elements where the windows are arranged. The X-ray emitting element is used to emit X-rays toward the window of the fluid receiving element, and the X-ray receiving element is used to receive X-ray fluorescence transmitted through the window; The moving element is configured to enable the plurality of fluid receiving elements to move relative to the X-ray emitting element and the X-ray receiving element, so that a window of each fluid receiving element can face the X-ray emitting element and the X-ray receiving element at the same time.

3. The device according to claim 1, characterized in that The fluid receiving member comprises: A containing cavity, used to contain the fluid, and the window is used to seal the containing cavity; A liquid inlet pipe, used for providing the fluid to the containing chamber; A liquid outlet pipe, used for allowing the fluid in the accommodating chamber to flow out; The exhaust pipe is in fluid communication with the liquid inlet pipe and is used for allowing the gas in the liquid inlet pipe to flow out.

4. The device according to claim 3, characterized in that The exhaust pipe is coaxially arranged with the liquid inlet pipe, wherein the exhaust pipe is arranged above the liquid inlet pipe.

5. The device according to claim 4, characterized in that The fluid receiving member further comprises: A body, wherein the body is formed with a receiving groove extending along a first direction, a through hole penetrating the body along a second direction, a first connecting channel connecting the receiving groove and the through hole, and a second connecting channel connecting the receiving groove, wherein the receiving groove has an opening along the first direction; The window is sealingly disposed on one side of the opening of the receiving groove to form the receiving cavity together with the receiving groove; The second connecting channel is in fluid communication with the liquid outlet pipe, the upper end of the through hole is in fluid communication with the exhaust pipe, and the lower end of the through hole is in fluid communication with the liquid inlet pipe.

6. The device according to claim 5, characterized in that The first connecting channel extends in a horizontal direction, and the first direction and the second direction are perpendicular to each other and are both perpendicular to an extending direction of the first connecting channel.

7. The device according to claim 2, characterized in that There are two fluid receiving components, and the bodies of the two fluid receiving components are integrally formed.

8. The device according to claim 5, characterized in that The window is made of polytetrafluoroethylene.

9. The device according to claim 1, characterized in that Also includes: A driving unit is used to drive the moving member to move.

10. A radioactive material dissolution system, characterized in that: include: A plurality of dissolution devices, each of which is configured to provide a dissolution space for the radioactive material ； The device for measuring the concentration of radioactive substances using X-ray fluorescence as described in any one of claims 1 to 9 is configured to measure the concentration of radioactive substances in the dissolving solutions of the multiple dissolving devices.

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