Radioactive substance dissolving system and radioactive substance concentration measuring device

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 radioactive substance concentration measuring device, and the device comprises a mounting bottom plate, a holding part, a plurality of fluid receiving parts, an X-ray emitting part, an X-ray receiving part and a driving part. The holder is movably disposed on the mounting base plate. The holder is formed along a holding groove in which the fluid receiver is disposed. The fluid receiving piece is provided with two windows which are oppositely arranged. The X-ray emitting part and the X-ray receiving part are arranged on the mounting bottom plate and oppositely arranged on the two sides of the holding part so that the concentration of the radioactive substance can be determined according to the intensity change of the X-rays penetrating through the two windows. The driving part drives the holding part to move relative to the X-ray emitting part and the X-ray receiving part, so that the X-ray emitting part and the X-ray receiving part can measure the concentration of the radioactive substances in any fluid receiving part, and the same device is used for measuring the concentration 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 radioactive material concentration measurement device. 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 the first aspect, an embodiment of the present application provides a radioactive material concentration measuring device, including: a mounting base plate, a retaining member, a plurality of fluid receiving members, an X-ray emitting member, an X-ray receiving member and a driving member. The retaining member is movably disposed on the mounting base plate; the retaining member forms a retaining groove extending along a first direction, and the retaining member also forms a plurality of through hole groups spaced apart along the first direction, and each through hole group includes two through holes disposed oppositely along a second direction, and the second direction is perpendicular to the first direction; a plurality of fluid receiving members are disposed in the retaining groove along the first direction, and are respectively used to receive fluids carrying radioactive materials, and each fluid receiving member has two windows disposed oppositely along the second direction for X-rays to pass through, and each fluid receiving member is placed in two windows facing the two through holes of each through hole group respectively; the X-ray emitting member and the X-ray receiving member are disposed on the mounting base plate, and the X-ray emitting member and the X-ray receiving member are disposed along the second direction. The second direction is relatively arranged on both sides of the retaining element, the X-ray emitting element is used to emit X-rays to a window of the fluid receiving element, and the X-ray receiving element is used to receive the X-rays transmitted through the other window to determine the intensity change of the X-rays after passing through the two windows; thereby determining the concentration of the radioactive substance based on the intensity change of the X-rays after passing through the two windows; the driving element is configured to drive the retaining element to move relative to the X-ray emitting element and the X-ray receiving element, so that the two through holes of each through hole group can face the X-ray emitting element and the X-ray receiving element respectively, thereby enabling the X-ray emitting element and the X-ray receiving element to measure the concentration of the radioactive substance in any fluid receiving element.

[0006] The radioactive material 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, so as to determine the degree of dissolution of the radioactive material by measuring the radioactivity of the dissolving liquid. The embodiment of the present application can use multiple fluid receiving parts to respectively receive the fluid carrying the radioactive material in multiple pipelines, and then use the moving retaining part to sequentially align the windows of different fluid receiving parts with the X-ray emitting part and the X-ray receiving part, so as to achieve the purpose of measuring the concentration of the radioactive material in multiple pipelines by the same X-ray emitting part and the X-ray receiving part, and the measurement efficiency is high. At the same time, the use of multiple fluid receiving parts to respectively carry the fluid of the radioactive material can also avoid mutual contamination between the fluids carrying the radioactive material.

[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 radioactive material concentration measuring device of the first aspect 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.

[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 radioactive substance concentration measuring device according to an embodiment of the present application;

[0011] Figure 2 yes Figure 1 A partial cross-sectional view of a radioactive material concentration measuring device shown;

[0012] Figure 3 yes Figure 1 The structure diagram of the radioactive material concentration measuring device shown in the figure omits the measuring part;

[0013] Figure 4 yes Figure 1 The structure diagram of the radioactive substance concentration measuring device shown is a schematic diagram of the structure of which the measuring part and the measuring fixing part are omitted;

[0014] Figure 5 yes Figure 4 An exploded schematic diagram of the structure shown;

[0015] Figure 6 yes Figure 4 A schematic cross-sectional view of the structure shown;

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

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

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

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

[0020] Fig.11 yes Fig.10 The dissolution system 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 insulation component and an air cooling component of the dissolution system is shown;

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

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

[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; 213, liquid inlet pipe; 214, liquid outlet pipe; 215, exhaust pipe; 216, body; 2161, through groove; 2162, through hole; 2163, first connecting channel; 2164, second connecting channel;

[0027] 220, measuring part; 221, X-ray emitting part; 222, X-ray receiving part; 223, emitting fixing part; 2231, first making way groove; 2232, X-ray emitting channel; 2233, first docking part; 224, receiving fixing part; 2241, second making way groove; 2242, X-ray receiving channel; 2243, second docking part; 2244, containing groove;

[0028] 230, retaining member; 232, retaining body; 233, retaining groove; 234, buckling portion; 2341, through hole; 235, screw rod; 236, stopper; 237, base; 2371, opening;

[0029] 240, bearing base plate; 241, sliding fitting;

[0030] 250, install the base plate; 251, make way hole;

[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] like Figures 1 to 3 As shown, the radioactive material concentration measuring device of the embodiment of the present application may include: a mounting base plate 250, a retaining member 230, a plurality of fluid receiving members 210, a measuring member 220 and a driving member.

[0041] In some embodiments, the retaining member 230 is movably disposed on the mounting base 250; the retaining member 230 forms a retaining groove 233 extending along the first direction, and the retaining member 230 also forms a plurality of through hole groups spaced apart along the first direction, each through hole group includes two through holes 2341 oppositely disposed along a second direction, and the second direction is perpendicular to the first direction.

[0042] A plurality of fluid receiving members 210 are disposed in the holding groove 233 along the first direction. The plurality of fluid receiving members 210 can be used to receive fluids carrying radioactive substances, respectively. Figure 4 The fluid receiving member 210 has two windows 211 arranged opposite to each other along the second direction. The two windows 211 arranged opposite to each other can be used for X-rays to pass through. Each fluid receiving member 210 is provided with two windows 211 facing the two through holes 2341 of each through hole group. The measuring member 220 is arranged on the mounting base plate 250, and can be used to determine the concentration of the radioactive substance according to the intensity change of the X-rays after passing through the two windows 211.

[0043] 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 opposite sides of the holding member 230 along the second direction. The X-ray emitting member 221 may be used to emit X-rays to one window 211 of the fluid receiving member 210. The X-ray receiving member 222 may be used to receive X-rays transmitted through another window 211 to determine the intensity change of the X-rays after passing through the two windows 211, thereby determining the concentration of the radioactive substance according to the intensity change of the X-rays after passing through the two windows 211.

[0044] The driving member can be configured to enable the retaining member 230 to move relative to the X-ray emitting member 221 and the X-ray receiving member 222, so that the two through holes 2341 of each through hole group can face the X-ray emitting member 221 and the X-ray receiving member 222 respectively, thereby enabling the X-ray emitting member 221 and the X-ray receiving member 222 to measure the concentration of radioactive substances in any fluid receiving member 210.

[0045] The radioactive material 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 dissolution degree of the radioactive material 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 material in multiple pipelines, and then move the windows 211 of different fluid receiving parts 210 to face the X-ray emitting part 221 and the X-ray receiving part 222 in turn through the moving retaining part 230, so as to achieve the purpose of measuring the concentration of the radioactive material in multiple pipelines by the same X-ray emitting part 221 and the X-ray receiving part 222, and the measurement efficiency is high. At the same time, using multiple fluid receiving parts 210 to respectively receive the fluid carrying the radioactive material can also avoid mutual contamination between the fluid carrying the radioactive material, resulting in inaccurate measurement.

[0046] The embodiment of the present application utilizes the X-ray emitting element 221 and the X-ray receiving element 222 to obtain the intensity of the X-rays before passing through the window 211 and after passing through the window 211. In this way, the concentration of the radioactive substance can be determined based on the intensity change of the X-rays before and after passing through the two windows 211 without the need for other complex measuring devices, and the measurement efficiency is high.

[0047] In some embodiments, the window 211 may be a circular window or a rectangular window. In the embodiment of the present application, the window 211 is a circular window.

[0048] In some embodiments, reference Figure 1 and Figure 2 The radioactive substance concentration measuring device may further include a measuring fixture for fixing the measuring element 220 .

[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 are arranged relatively to each other, 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-rays transmitted from the other window 211 can enter the receiving window.

[0050] In some embodiments, the measurement fixture may include a transmitting fixture 223 and a receiving fixture 224, which are respectively used to fix the X-ray transmitting element 221 and the X-ray receiving element 222. The retaining member 230 may be slidably disposed between the transmitting fixture 223 and the receiving fixture 224. The transmitting fixture 223 and the receiving fixture 224 are mounted on the mounting base 250.

[0051] In some embodiments, the transmitting fixture 223 and the receiving fixture 224 are arranged so that the transmitting window of the X-ray transmitting element 221 faces the receiving window of the X-ray receiving element 222, so that the X-rays emitted from the transmitting window can be received by the receiving window after passing through the fluid receiving element 210.

[0052] In some embodiments, the emission fixture 223 may be formed with an X-ray emission channel 2232, and the X-ray emission channel 2232 is arranged opposite to the emission window of the X-ray emission element 221. The receiving fixture 224 may be formed with an X-ray receiving channel 2242, and the X-ray receiving channel 2242 is arranged opposite to the receiving window of the X-ray receiving element 222. The X-ray receiving channel 2242 faces the X-ray emission channel 2232, so that X-rays can be transmitted in the X-ray receiving channel 2242 and the X-ray emission channel 2232.

[0053] In some embodiments, the receiving fixture 224 may also be formed with a receiving groove 2244, and the receiving window of the X-ray receiving element 222 can enter the receiving groove 2244 and face the X-ray receiving channel 2242 to minimize X-ray leakage.

[0054] In some embodiments, the emission fixture 223 may include a first docking member 2233 for docking the X-ray emission channel 2232 with the through hole 2341 of the fluid receiving member 210 to minimize X-ray leakage. The receiving fixture 224 may include a second docking member 2243 for docking the X-ray receiving channel 2242 with the through hole 2341 of the fluid receiving member 210 to minimize X-ray leakage.

[0055] In some embodiments, the X-ray emitting element 221 can be configured to emit X-rays whose energy range includes the L-layer absorption limit of radioactive elements. This can ensure that the probability of photoelectric effect of X-rays increases, and can also increase the mass absorption coefficient of X-rays sharply, so as to improve the recognition accuracy of radioactive substances.

[0056] In some embodiments, the window 211 may be made of a carbon fiber material. When the concentration of the radioactive substance is determined by the intensity change before and after the X-ray passes through the two windows 211, the concentration measurement result of the radioactive substance is related to the path length of the X-ray passing between the two windows 211. When the window 211 is deformed, the path length of the X-ray passing between the two windows 211 will change, resulting in a change in the measurement result. The inventor of the present application has found that the use of carbon fiber material to make the window 211 can make the window 211 absorb less X-rays and the window 211 has a higher hardness, which can ensure that the window 211 is not easy to deform, thereby ensuring that the concentration measurement result of the radioactive substance is relatively reliable. In other words, the path length of the X-ray passing through the two windows 211 affects the intensity of the X-ray before and after passing through the two windows 211, and the concentration measurement result of the radioactive substance is determined based on the intensity change after the X-ray passes through the two windows 211. Therefore, it is necessary to ensure that the two windows 211 are relatively stable and not easy to deform, so as to avoid affecting the concentration measurement result of the radioactive substance in the fluid receiving part 210 due to the inconsistent path length of the X-ray passing through the two windows 211.

[0057] When the X-ray passes through the two windows 211 in sequence, the measuring element 220 can indicate the intensity change of the X-ray after passing through the two windows 211 according to the change of transmittance after the X-ray passes through the two windows 211, and further determine the concentration of the radioactive substance.

[0058] In some embodiments, Figures 4 to 6 As shown, the fluid receiving member 210 may include a receiving chamber, a liquid inlet pipe 213, and a liquid outlet pipe 214. The receiving chamber may be used to receive a fluid. The two windows 211 may be used to seal the receiving chamber. The liquid inlet pipe 213 may be used to provide a fluid to the receiving chamber. The liquid outlet pipe 214 may be used to allow the fluid in the receiving chamber 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.

[0059] 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 containing chamber 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 containing chamber together, thereby improving the measurement accuracy of the concentration of the radioactive substance.

[0060] 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.

[0061] In an embodiment of the present application, the radioactive material concentration measuring device may further include a peristaltic pump. The peristaltic pump may be used to extract fluid so that the fluid may enter the accommodating cavity of the fluid receiving member 210 via the liquid inlet pipe 213 and flow out of the accommodating cavity via the liquid outlet pipe 214. In this way, it is ensured that the extraction speed of the fluid is more accurately controlled when the peristaltic pump does not directly contact the fluid carrying the radioactive material, so as to improve the safety of the overall operation.

[0062] In some embodiments, reference Figure 6 The exhaust pipe 215 and the liquid inlet pipe 213 can be coaxially arranged. The exhaust pipe 215 can be arranged above the liquid inlet pipe 213. Thus, during the liquid inlet process, the gas can rise to the exhaust pipe 215 under the action of buoyancy and separate from the liquid, thereby preventing the gas from entering the containing cavity and affecting the measurement result.

[0063] In some embodiments, the fluid receiving member 210 may further include a body 216. Figure 6 The body 216 is formed with a through groove 2161 penetrating the body 216 along the second direction, a through hole 2162 penetrating the body 216 along the third direction, a first connecting channel 2163 connecting the through groove 2161 and the through hole 2162, and a second connecting channel 2164 communicating with the through groove 2161. The two windows 211 can be respectively and hermetically arranged on both sides of the through groove 2161 to form a receiving cavity together with the through groove 2161. The second connecting channel 2164 is in fluid communication with the liquid outlet pipe 214. The upper end of the through hole 2162 is in fluid communication with the exhaust pipe 215. The lower end of the through hole 2162 is in fluid communication with the liquid inlet pipe 213. The third direction is perpendicular to the first direction and the second direction.

[0064] In the embodiment of the present application, the fluid receiving member 210 can quickly receive or discharge radioactive substances through the through 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, so as to avoid the gas entering the containing chamber and affecting the measurement results.

[0065] In some embodiments, the first connecting channel 2163 extends along the first direction, the third direction can be a vertical direction, the first direction and the second direction can be perpendicular to each other and both are horizontal directions, which is conducive to timely discharge of gas before the fluid enters the accommodating cavity.

[0066] In some embodiments, the body 216 may be made of corrosion-resistant material to reduce absorption of X-rays. In some embodiments, the window 211 may be connected to the body 216 via a flange. A fluororubber gasket is provided between the window 211 and the body 216. The fluororubber gasket is elastic, resistant to organic phase solution and acid corrosion, and can pass through rays, which is conducive to ensuring the sealing of the accommodating cavity without affecting the measurement results.

[0067] In some embodiments, if the concentration of the radioactive material carried in the current fluid receiving component 210 is measured, the holding 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 holding component 230 can be moved relative to the mounting base plate 250 by using a slide rail or a conveyor belt.

[0068] In some embodiments, Figures 4 to 6 As shown, the retaining member 230 may include a retaining body 232 and a buckling portion 234. The buckling portion 234 is disposed above the retaining body 232 and forms a retaining groove 233 together with the retaining body 232. The retaining body 232 and the buckling portion 234 respectively form a channel penetrating from top to bottom.

[0069] The bottom of the holding body 232 forms a stopper 236. The stopper 236 can be used to prevent the plurality of fluid receiving members 210 from being separated from the holding groove 233. The buckle 234 can be detachably connected to the holding body 232. In the embodiment of the present application, the plurality of fluid receiving members 210 can be movably arranged in the holding groove 233 by means of the holding body 232 and the buckle 234. This not only facilitates the user to disassemble and assemble the fluid receiving member 210, but also can fix the fluid receiving member 210 to prevent the fluid receiving member 210 from shaking, so that the measuring member 220 can be aligned with the window 211.

[0070] In some embodiments, the retaining body 232 and the buckling portion 234 may be detachably connected via fasteners.

[0071] Refer again Figure 4 and Figure 5 As shown, a through hole 2341 may be provided at a position corresponding to the window of the holding body 232. The area of ​​the through hole 2341 may be greater than or equal to the area of ​​the window 211. In the process of the driving unit driving the holding member 230 to move, the through hole 2341 on the holding body 232 in the holding member 230 may be used to face the emission line of the X-ray emitting element 221 and the receiving line of the X-ray receiving element to ensure that the X-rays can pass through the two windows 211 in sequence.

[0072] In some embodiments, the radioactive material concentration measuring device may further include a plurality of measuring containers. When the fluid receiving member 210 is taken out, a plurality of measuring containers may be placed in the holding groove 233. The measuring container may contain a fluid carrying a radioactive material, thereby performing offline measurement on the fluid.

[0073] In some embodiments, the concentration measuring device may further include a base 237, which is detachably connected to the holding body 232 with the snap-fitting portion 234 at both sides of the holding body 232. The base 237 forms an opening 2371 for the liquid inlet pipe 213 and the liquid outlet pipe 214 of each fluid receiving member 210 to pass through.

[0074] In some embodiments, reference Figure 3 and Figure 4 As shown, the concentration measuring device may further include two supporting base plates 240. The two supporting base plates 240 are detachably connected to the base 237 at both sides of the base 237.

[0075] The bearing base plate 240 is movably disposed on the mounting base plate 250. The bearing base plate 240 is provided with a sliding member, and the mounting base plate 250 may also be provided with a sliding matching member 241. Through the cooperation between the sliding member and the sliding matching member 241, the bearing base plate 240 is movably disposed on the mounting base plate 250. In some embodiments, the sliding member may be a slider, and the sliding matching member 241 may be a slide rail.

[0076] In some embodiments, a first clearance groove 2231 may be formed on the transmitting fixture 223. A second clearance groove 2241 may be formed on the receiving fixture 224. The first clearance groove 2231 and the second clearance groove 2241 may be used to provide a sliding space for the bearing bottom plate 240.

[0077] See also Figure 5 The mounting base plate 250 may be provided with a clearance hole 251 to provide a moving space for the liquid inlet pipe 213 and the liquid outlet pipe 214 on the fluid receiving member 210 .

[0078] In some embodiments, the driving part can be a stepper motor. A screw rod 235 is provided in the stepper motor. The screw rod 235 can be provided with a thread. A threaded mating portion can be formed on the bearing base plate 240. Through the mutual cooperation between the thread and the threaded mating portion, the screw rod 235 can be threadedly connected to the bearing base plate 240. The stepper motor can drive the retaining member 230 to move by driving the thread on the screw rod 235 to rotate, thereby driving the multiple fluid receiving members 210 to move.

[0079] 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.

[0080] 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.

[0081] 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 .

[0082] 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.

[0083] 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.

[0084] 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 .

[0085] See also Figure 7 and Figure 8In 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] See also Figure 7 and Figure 8 In some embodiments, the heat sink 12 may include a water-cooled heat sink 121. The water-cooled heat sink 121 may be arranged radially outside the dissolution tank 13 for cooling water to flow so as to diffuse the heat of the dissolution tank 13 outward. In some embodiments, the water-cooled heat sink 121 may include a water-cooled inlet and a water-cooled outlet. The heat sink 12 may also be provided with a cooling water inlet 122 and a cooling water outlet 123. The cooling water inlet 122 is connected to the water-cooled inlet of the water-cooled heat sink 121, and the cooling water outlet 123 is connected to the water-cooled outlet of the water-cooled heat sink 121. The cooling water can enter the water-cooled heat sink 121 through the cooling water inlet 122 and the water-cooled inlet. The cooling water entering the water-cooled heat sink 121 can exchange heat with the dissolution tank 13 to diffuse the heat of the dissolution tank 13 outward. After the heat exchange is completed, the cooling water can leave the water-cooled heat sink 121 through the cooling water outlet 123 and the water-cooled outlet. In such an embodiment, the heat of the dissolution tank 13 can be diffused outward by heat exchange with cooling water. See. Fig. 9 In some embodiments, the water-cooling heat dissipation portion 121 may be an annular water-cooling cavity.

[0092] See also Figure 8 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.

[0093] 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 .

[0094] See also Figure 7 and Figure 8In 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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 .

[0106] 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.

[0107] 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 .

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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 .

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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 .

[0120] 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 .

[0121] 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.

[0122] 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, characterized in that: include: Install the base plate; A retaining member is movably disposed on the mounting base plate; the retaining member forms a retaining groove extending along a first direction, and the retaining member also forms a plurality of through hole groups spaced apart along the first direction, each of the through hole groups includes two through holes disposed opposite to each other along a second direction, and the second direction is perpendicular to the first direction; A plurality of fluid receiving members, arranged in the holding groove along the first direction, respectively used to receive fluid carrying radioactive substances, each of the fluid receiving members having two windows arranged opposite to each other along the second direction for X-rays to pass through, each of the fluid receiving members being placed in the two windows and facing the two through holes of each through hole group respectively; An X-ray emitting element and an X-ray receiving element are arranged on the mounting base plate, and the X-ray emitting element and the X-ray receiving element are arranged on two sides of the holding element opposite to each other along the second direction, the X-ray emitting element is used to emit X-rays to one window of the fluid receiving element, and the X-ray receiving element is used to receive X-rays transmitted through the other window to determine the intensity change of the X-rays after passing through the two windows; thereby determining the concentration of the radioactive substance according to the intensity change of the X-rays after passing through the two windows; A driving member is configured to drive the retaining member to move relative to the X-ray emitting member and the X-ray receiving member so that the two through holes of each through hole group can face the X-ray emitting member and the X-ray receiving member respectively, thereby enabling the X-ray emitting member and the X-ray receiving member to measure the concentration of the radioactive substance in any one of the fluid receiving members.

2. The device according to claim 1, characterized in that The X-ray emitting element is arranged so that the energy range of the X-rays it emits includes the L-layer absorption edge of the radioactive element.

3. The device according to claim 1, characterized in that The window is made of carbon fiber material.

4. The device according to claim 1, characterized in that The X-ray emitting element comprises an emitting window, and the X-ray receiving element comprises a receiving window; The device also includes: The transmitting fixture and the receiving fixture are arranged on the mounting base plate and are used to fix the X-ray transmitting element and the X-ray receiving element respectively; The emission fixing member is formed with an X-ray emission channel, and the X-ray emission channel is arranged opposite to the emission window of the X-ray emission member; The receiving fixture is formed with an X-ray receiving channel, and the X-ray receiving channel is arranged opposite to the receiving window of the X-ray receiving element; The X-ray receiving channel faces the X-ray emitting channel.

5. The device according to claim 4, characterized in that The receiving fixture is also formed with a receiving groove, and the receiving window of the X-ray receiving element can enter the receiving groove and face the X-ray receiving channel.

6. The device according to claim 5, characterized in that The fluid receiving member comprises a liquid inlet pipe and a liquid outlet pipe; The device also includes: A base, the retaining member is connected to the base, and the base forms an opening for the liquid inlet pipe and the liquid outlet pipe of each fluid receiving member to pass through; Two bearing bottom plates, the two bearing bottom plates are detachably connected to the base at both sides of the base, and the bearing bottom plates are movably arranged on the mounting bottom plate; Wherein, the installation base plate is provided with a clearance hole to provide a moving space for the liquid inlet pipe and the liquid outlet pipe of the fluid receiving component.

7. The device according to claim 6, characterized in that The bearing base plate is provided with a sliding piece, and the mounting base plate is provided with a sliding matching piece. Through the matching of the sliding piece and the sliding matching piece, the bearing base plate can be movably arranged on the mounting base plate.

8. The device according to claim 6, characterized in that The transmitting fixing member is formed with a first clearance groove, and the receiving fixing member is formed with a second clearance groove. The first clearance groove and the second clearance groove are used to provide sliding space for the bearing bottom plate.

9. 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 radioactive substance concentration measuring device according to any one of claims 1 to 8 is configured to measure the concentration of the radioactive substance in the dissolving solution of the multiple dissolving devices.

10. The system according to claim 9, characterized in that The dissolving device includes a body for dissolving radioactive materials, a heat sink connected to the body, a cover for closing or opening the body, and a seal arranged between the cover and the heat sink, wherein the heat sink is arranged to diffuse the heat of the body outward.

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