Radioactive substance dissolving system and radioactive substance concentration measuring device

Abstract

Embodiments of the present application relate to the technical field of radioactive material analysis, and particularly relate to a radioactive material dissolving system and a radioactive material concentration measuring device. The device comprises a mounting base plate, a holding member, a plurality of fluid receiving members, an X-ray emitting member, an X-ray receiving member, and a driving member. The holding member is movably arranged on the mounting base plate. The holding member forms a holding groove, and the fluid receiving members are arranged in the holding groove. The fluid receiving members have two windows arranged oppositely. The X-ray emitting member and the X-ray receiving member are arranged on the mounting base plate and oppositely arranged on both sides of the holding member, so as to determine the concentration of the radioactive material according to the intensity change of the X-ray after penetrating through the two windows. The driving member drives the holding member to move relative to the X-ray emitting member and the X-ray receiving member, so that the X-ray emitting member and the X-ray receiving member can measure the concentration of the radioactive material in any fluid receiving member, thereby measuring the concentration of the radioactive material in multiple pipelines by using the same device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of radioactive substance analysis, in particular to a radioactive substance dissolving system and a concentration measuring device for radioactive substance. BACKGROUND

[0002] When performing component analysis on radioactive substances, the radioactive substances can be dissolved by using a dissolving device. A radioactive plate-shaped sample collecting radioactive substances can be placed in the dissolving device, and a solution capable of dissolving the radioactive substances is added to the dissolving device to dissolve the radioactive substances.

[0003] At present, when the radioactive substances are dissolved in the dissolving device, the dissolution degree of the radioactive substances in the dissolving device cannot be accurately determined for component analysis of the radioactive substances, because the radioactive substances cannot be observed by naked eyes. SUMMARY

[0004] A brief summary of the application is presented in the following to provide a basic understanding of some aspects of the application. It should be understood that this summary is not an exhaustive overview of the application. It is not intended to identify key or critical elements of the application or to delineate the scope of the application. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.

[0005] In a first aspect, embodiments of the present application provide a radioactive substance concentration measuring device, which includes a mounting plate, a holding member, a plurality of fluid receiving members, an X-ray emitting member, an X-ray receiving member, and a driving member. The holding member is movably arranged on the mounting plate. The holding member forms a holding groove extending along a first direction, and forms a plurality of through hole groups arranged along the first direction at intervals, each of the through hole groups including two through holes oppositely arranged along a second direction perpendicular to the first direction. The plurality of fluid receiving members are arranged in the holding groove along the first direction, and are respectively used for receiving fluid carrying radioactive substances. Each of the fluid receiving members has two windows oppositely arranged along the second direction, and is used for allowing X-rays to pass through. Each of the fluid receiving members is arranged such that the two windows face the two through holes of each of the through hole groups, respectively. The X-ray emitting member and the X-ray receiving member are arranged on the mounting plate, and are oppositely arranged on two sides of the holding member along the second direction. The X-ray emitting member is used for emitting X-rays to one window of the fluid receiving member, and the X-ray receiving member is used for receiving X-rays transmitted through the other window, so as to determine intensity variation of the X-rays after passing through the two windows. Thus, the concentration of the radioactive substances can be determined according to the intensity variation of the X-rays after passing through the two windows. The driving member is arranged to drive the holding member to move relative to the X-ray emitting member and the X-ray receiving member, so as to enable the two through holes of each of the through hole groups to face the X-ray emitting member and the X-ray receiving member, respectively. Thus, the X-ray emitting member and the X-ray receiving member can measure the concentration of the radioactive substances in any of the fluid receiving members.

[0006] The radioactive substance concentration measuring device provided by the embodiments of the present application can guide the dissolving solution in the dissolving device out through the fluid receiving member, so as to determine the dissolving degree of the radioactive substances by measuring the radioactivity of the dissolving solution. The embodiments of the present application can use the plurality of fluid receiving members to respectively receive the fluid carrying radioactive substances in the plurality of pipelines, and then move the holding member to sequentially arrange the windows of the different fluid receiving members opposite to the X-ray emitting member and the X-ray receiving member, so as to enable the same X-ray emitting member and X-ray receiving member to measure the concentration of the radioactive substances in the plurality of pipelines, and the measurement efficiency is relatively high. Meanwhile, the plurality of fluid receiving members respectively carrying the fluid carrying radioactive substances can avoid mutual pollution between the fluid carrying radioactive substances.

[0007] In a second aspect, embodiments of the present application further provide a radioactive substance dissolving system, which can include a plurality of dissolving devices and the radioactive substance concentration measuring device of the first aspect of the present application. Each of the dissolving devices is arranged to provide a dissolving space for radioactive substances. The radioactive substance concentration measuring device is arranged to measure the concentration of the radioactive substances in the dissolving solution of the plurality of dissolving devices.

[0008] These and other aspects of the present application will become apparent from the following detailed description of preferred embodiments thereof, taken in conjunction with the accompanying drawings. Attached Figure Description

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

[0010] Figure 1 This is a schematic diagram of the structure of a radioactive material concentration measuring device according to an embodiment of this application;

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

[0012] Figure 3 yes Figure 1 The schematic diagram of the radioactive material concentration measuring device shown is omitted, omitting the structural diagram of the measuring component.

[0013] Figure 4 yes Figure 1 The diagram shown is a structural schematic of the radioactive material concentration measuring device, omitting the measuring components and the measuring fixture.

[0014] Figure 5 yes Figure 4 The diagram shown is an exploded view of the structure.

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

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

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

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

[0019] Figure 10 yes Figure 7 The diagram shown is a top view of the dissolution system without the cover.

[0020] Figure 11 yes Figure 10 The diagram shown is a top view of the dissolution system omitting the heat sink.

[0021] Figure 12 is Figure 7 Schematic view of the structure of the body heat preservation part and the gas cooling assembly of the dissolution system shown;

[0022] Figure 13 is Figure 7 Schematic view of the structure of the dissolution system shown after the cover part opens the upper opening of the dissolution tank.

[0023] Figure 14 is Figure 7 Schematic view of the structure of the dissolution system shown after the cover part opens the upper opening of the dissolution tank.

[0024] It should be noted that the drawings are not necessarily drawn to scale, but are only shown in a schematic manner without affecting the understanding of the reader.

[0025] Explanation of reference signs:

[0026] 210, fluid receiving part; 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 accommodation groove; 2232, X-ray emitting channel; 2233, first docking part; 224, receiving fixing part; 2241, second accommodation groove; 2242, X-ray receiving channel; 2243, second docking part; 2244, containing groove;

[0028] 230, holding part; 232, holding body; 233, holding groove; 234, buckling part; 2341, through hole; 235, screw rod; 236, limiting part; 237, base; 2371, opening;

[0029] 240, bearing bottom plate; 241, sliding fitting part;

[0030] 250, mounting bottom plate; 251, accommodation hole;

[0031] 10, dissolution device;

[0032] 11, body; 111, first side plate; 1111, first limiting part; 1112, second limiting part; 112, second side plate; 113, connecting fitting part; 12, heat dissipation part; 121, water-cooled heat dissipation part; 122, cooling water inlet; 123, cooling water outlet; 124, air-cooled heat dissipation part; 125, connecting part;

[0033] 13. Melting 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 conduction element; 1423. Cover plate protective shell; 1424. Cover plate insulation element; 15. Sealing element;

[0034] 16. Main body heating assembly; 161. Main body heating element; 162. Main body heat conduction element; 163. Main body insulation element; 1631. Insulation body; 1632. Partition plate; 1633. Heat dissipation channel; 164. Main body protective shell; 17. Air cooling assembly; 171. Air inlet pipe; 172. Air outlet pipe; 173. Cooling pipe;

[0035] 101. Feed pipe; 102. Air inlet pipe; 103. Liquid return pipe; 104. Liquid outlet pipe; 105. Air extraction pipe; 106. Air venting pipe; 107. Bottom insulation component; 108. Side insulation component; 109. Side protective shell. Detailed Implementation

[0036] Exemplary embodiments of this application will be described below with reference to the accompanying drawings. For clarity and brevity, not all features of actual implementations are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the development of any such actual embodiment to achieve the developer's specific goals, such as complying with constraints related to the system and business, and these constraints may vary depending on the implementation. Furthermore, it should be understood that while development work can be very complex and time-consuming, such development work is merely a routine task for those skilled in the art who benefit from the content of this application.

[0037] It should also be noted that, in order to avoid obscuring this application with unnecessary details, only the equipment structure and / or processing steps closely related to the solution according to this application are shown in the accompanying drawings, while other details that are not closely related to this application are omitted.

[0038] It should be noted that, unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning as understood by a person with ordinary skills in the field to which this application pertains.

[0039] In the description of the embodiments of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] like Figures 1 to 3 As shown, the radioactive material concentration measuring device of this application embodiment may include: a mounting base plate 250, a holding member 230, a plurality of fluid receiving members 210, a measuring member 220, and a driving member.

[0041] In some embodiments, the holder 230 is movably arranged on the mounting base 250. The holder 230 forms a holding groove 233 extending along a first direction, and the holder 230 further forms a plurality of through hole groups arranged along the first direction, each of the through hole groups including two through holes 2341 oppositely arranged along a second direction perpendicular to the first direction.

[0042] The plurality of fluid receivers 210 are arranged along the first direction in the holding groove 233. The plurality of fluid receivers 210 can be respectively used to receive fluid carrying radioactive substances. Referring to Figure 4 The fluid receiver 210 has two windows 211 oppositely arranged along the second direction. The oppositely arranged two windows 211 can be used for X-ray transmission. Each of the fluid receivers 210 is arranged such that the two windows 211 and the two through holes 2341 of each of the through hole groups respectively face each other. The measuring member 220 is arranged on the mounting base 250 and can be used to determine the concentration of the radioactive substances according to the intensity change of the X-ray after the X-ray transmits through the two windows 211.

[0043] The measuring member 220 can 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 can be oppositely arranged on two sides of the holder 230 along the second direction. The X-ray emitting member 221 can be used to emit X-ray to one of the windows 211 of the fluid receiver 210. The X-ray receiving member 222 can be used to receive the X-ray transmitted through the other window 211, so as to determine the intensity change of the X-ray after the X-ray transmits through the two windows 211, and to determine the concentration of the radioactive substances according to the intensity change of the X-ray after the X-ray transmits through the two windows 211.

[0044] The driving member can be arranged to enable the holder 230 to move relative to the X-ray emitting member 221 and the X-ray receiving member 222, so as to enable the two through holes 2341 of each of the through hole groups to respectively face the X-ray emitting member 221 and the X-ray receiving member 222, and to enable the X-ray emitting member 221 and the X-ray receiving member 222 to measure the concentration of the radioactive substances in any of the fluid receivers 210.

[0045] The embodiment of the present application provides the concentration measuring device of radioactive substances, which can guide the dissolving solution in the dissolving device out through the fluid receiving member 210, so as to determine the dissolving degree of the radioactive substances by measuring the radioactivity of the dissolving solution. The embodiment of the present application can utilize a plurality of fluid receiving members 210 to respectively receive the fluid carrying radioactive substances in a plurality of pipelines, and then sequentially arrange the windows 211 of the different fluid receiving members 210 to be opposite to the X-ray emitting member 221 and the X-ray receiving member 222 through the moving retaining member 230, so as to realize the purpose that the same X-ray emitting member 221 and X-ray receiving member 222 respectively measure the concentration of the radioactive substances in the plurality of pipelines, and the measuring efficiency is higher. Meanwhile, the plurality of fluid receiving members 210 respectively receiving the fluid carrying radioactive substances can also avoid the mutual pollution between the fluids carrying radioactive substances, so as to cause the inaccurate measurement.

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

[0047] In some embodiments, the window 211 can 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, referring to Figure 1 and Figure 2 , the radioactive substance concentration measuring device can further comprise a measuring fixing member for fixing the measuring member 220.

[0049] It is easy to understand that the X-ray emitting member 221 has an emitting window for emitting X-rays, the X-ray receiving member 222 has a receiving window for receiving X-rays, and the emitting window of the X-ray emitting member 221 and the receiving window of the X-ray receiving member 222 are oppositely arranged, so that the X-rays emitted from the emitting window can enter the inside of the fluid receiving member 210 through the window 211, and the X-rays transmitted from the other window 211 can enter the receiving window.

[0050] In some embodiments, the measuring fixing member can comprise an emitting fixing member 223 and a receiving fixing member 224 for respectively fixing the X-ray emitting member 221 and the X-ray receiving member 222. The retaining member 230 can be slidably arranged between the emitting fixing member 223 and the receiving fixing member 224. The emitting fixing member 223 and the receiving fixing member 224 are installed on the mounting bottom plate 250.

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

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

[0053] In some embodiments, the receiving fixture 224 can also be formed with a receiving groove 2244, and the receiving window of the X-ray receiving member 222 can enter the receiving groove 2244 to face the X-ray receiving channel 2242, so as to avoid X-ray leakage as much as possible.

[0054] In some embodiments, the emitting fixture 223 can include a first docking member 2233 for docking the X-ray emitting channel 2232 with the through hole 2341 of the fluid receiving member 210, so as to avoid X-ray leakage as much as possible. The receiving fixture 224 can 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, so as to avoid X-ray leakage as much as possible.

[0055] In some embodiments, the X-ray emitting member 221 can be arranged such that the energy range of the X-rays emitted thereby contains the L-shell absorption limit of radioactive elements. In this way, the probability of photoelectric effect of the X-rays can be increased, and the mass absorption coefficient of the X-rays can also be increased sharply, so as to improve the identification accuracy of radioactive substances.

[0056] In some embodiments, the window 211 may be made of carbon fiber. When determining the concentration of radioactive material by utilizing the intensity change of X-rays before and after passing through the two windows 211, the concentration measurement result is related to the path length of the X-rays between the two windows 211. When the window 211 deforms, the path length of the X-rays between the two windows 211 changes, leading to changes in the measurement result. The inventors of this application have discovered that using carbon fiber to make the window 211 results in less X-ray absorption and higher rigidity, ensuring that the window 211 is not easily deformed, thereby ensuring a more reliable concentration measurement result of radioactive material. In other words, the path length of X-rays passing through the two windows 211 affects the intensity of X-rays before and after passing through the two windows 211, and the concentration measurement result of radioactive material is determined based on the intensity change of X-rays after passing through the two windows 211. Therefore, it is necessary to ensure that the two windows 211 are relatively stable and not easily deformed to avoid affecting the concentration measurement result of radioactive material in the fluid receiver 210 due to inconsistent path lengths of X-rays passing through the two windows 211.

[0057] After X-rays pass through the two windows 211 in sequence, the measuring element 220 can represent the intensity change of X-rays after passing through the two windows 211 based on the change in transmittance, and thus determine the concentration of radioactive material.

[0058] In some embodiments, such as Figures 4 to 6 As shown, the fluid receiving device 210 may include a receiving cavity, an inlet pipe 213, and an outlet pipe 214. The receiving cavity can be used to contain fluid. Two windows 211 can be used to seal the receiving cavity. The inlet pipe 213 can be used to supply fluid to the receiving cavity. The outlet pipe 214 can be used to allow the fluid in the receiving cavity to flow out. The inlet pipe 213 can be in fluid communication with the outlet line of the dissolving device, and the outlet pipe 214 can be in fluid communication with the return line of the dissolving device, thereby enabling online measurement of the radioactivity of the dissolving solution in the dissolving device.

[0059] It is found that the fluid receiving member 210 with the above structure has a problem of large measurement error. The inventors of the present application find that this is because small air bubbles are inevitably carried in the fluid to be measured when the fluid is pumped into the accommodation cavity by the pumping device, and the presence of the air bubbles affects the accuracy of the measurement. Therefore, in some embodiments, the fluid receiving member 210 can further include an exhaust pipe 215. The exhaust pipe 215 can be in fluid communication with the liquid inlet pipe 213. The exhaust pipe 215 can be used for the gas in the liquid inlet pipe 213 to flow out. The embodiments of the present application can avoid sending the air bubbles carried by the fluid into the corresponding accommodation cavity by setting the fluid receiving member 210 to include the exhaust pipe 215 and using the exhaust pipe 215 to flow out the gas in the liquid inlet pipe 213, thereby improving the measurement accuracy of the concentration of radioactive substances.

[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 the embodiments of the present application, the concentration measuring device of radioactive substances can further include a peristaltic pump. The peristaltic pump can be used to extract the fluid so that the fluid can enter the accommodation cavity of the fluid receiving member 210 through the liquid inlet pipe 213 and flow out of the accommodation cavity through the liquid outlet pipe 214. In this way, the extraction speed of the fluid can be more accurately controlled without the peristaltic pump directly contacting the fluid carrying radioactive substances, thereby improving the safety of the overall operation.

[0062] In some embodiments, with reference to 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. In this way, 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 avoiding the gas entering the accommodation cavity and affecting the measurement results.

[0063] In some embodiments, the fluid receiving member 210 can further include a body 216. With reference to Figure 6 , the body 216 is formed with a through groove 2161 penetrating the body 216 in a second direction, a through hole 2162 penetrating the body 216 in a third direction, a first connecting channel 2163 communicating the through groove 2161 and the through hole 2162, and a second connecting channel 2164 communicating the through groove 2161. The two windows 211 can be sealingly arranged on both sides of the through groove 2161, respectively, to form the accommodation 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 embodiments of this application, the through groove 2161, through hole 2162, first connecting channel 2163, and second connecting channel 2164 formed in the body 216 enable the fluid receiving member 210 to quickly receive or discharge radioactive materials. Simultaneously, during the flow of radioactive material that has entered the inlet pipe 213, air bubbles can be continuously discharged from the exhaust pipe 215, thereby timely venting the gas before the fluid enters the receiving cavity and preventing gas from entering the receiving cavity and affecting the measurement results.

[0065] In some embodiments, the first connecting channel 2163 extends along a first direction, and 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 beneficial to timely discharge gas before the fluid enters the receiving cavity.

[0066] In some embodiments, the body 216 may be made of a corrosion-resistant material to reduce X-ray absorption. In some embodiments, the window 211 may be connected to the body 216 via a flange. A fluororubber gasket is disposed between the window 211 and the body 216. The fluororubber gasket is elastic, resistant to organic phase solutions and acid corrosion, while allowing X-rays to pass through, which helps to ensure the sealing of the cavity without affecting the measurement results.

[0067] In some embodiments, once the concentration of the radioactive material carried in the current fluid receiver 210 has been measured, the retainer 230 can be used to move the next fluid receiver 210 to the position of the current fluid receiver 210 to measure the concentration of the radioactive material carried in the next fluid receiver 210. In some embodiments, the retainer 230 can be moved relative to the mounting base 250 using a slide rail or conveyor belt, etc.

[0068] In some embodiments, such as Figures 4 to 6 As shown, the retainer 230 may include a retaining body 232 and a fastening part 234. The fastening part 234 is disposed above the retaining body 232 and together with the retaining body 232 forms a retaining groove 233. The retaining body 232 and the fastening part 234 respectively form a through channel extending vertically.

[0069] A retaining body 232 has a limiting member 236 at its bottom. The limiting member 236 can be used to prevent multiple fluid receiving components 210 from disengaging from the retaining groove 233. The fastening part 234 can be detachably connected to the retaining body 232. In the embodiments of this application, multiple fluid receiving components 210 can be movably disposed in the retaining groove 233 by means of the retaining body 232 and the fastening part 234. This facilitates the user's disassembly and assembly of the fluid receiving components 210, and also fixes the fluid receiving components 210 to prevent them from shaking, so that the measuring component 220 can be aligned with the window 211.

[0070] In some embodiments, the retaining body 232 and the fastening portion 234 can be detachably connected by fasteners.

[0071] Refer again Figure 4 and Figure 5 As shown, a through hole 2341 can be provided on the holding body 232 corresponding to the window position. The area of ​​the through hole 2341 can be greater than or equal to the area of ​​the window 211. During the movement of the holding member 230 driven by the driving unit, the through hole 2341 on the holding body 232 in the holding member 230 can 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 X-rays can pass through the two windows 211 in sequence.

[0072] In some embodiments, the radioactive material concentration measuring device may further include multiple measuring containers. When the fluid receiver 210 is removed, multiple measuring containers can be placed in the holding tank 233. The measuring containers may contain fluid carrying radioactive material, thereby enabling offline measurement of the fluid.

[0073] In some embodiments, the concentration measuring device may further include a base 237, which is detachably connected to the retaining body 232 on both sides of the retaining body 232, with the base 237 and the fastening portion 234 respectively. The base 237 forms an opening 2371 for the passage of the inlet pipe 213 and the outlet pipe 214 of each fluid receiving element 210.

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

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

[0076] In some embodiments, a first clearance groove 2231 may be formed on the launching 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 can be used to provide sliding space for the supporting base plate 240.

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

[0078] In some embodiments, the driving unit can be a stepper motor. The stepper motor includes a lead screw 235. The lead screw 235 may have threads. A threaded engagement portion may be formed on the support base plate 240. Through the mutual engagement between the threads and the threaded engagement portion, the lead screw 235 can be threadedly connected to the support base plate 240. The stepper motor can drive the thread on the lead screw 235 to rotate, thereby moving the retainer 230, and consequently moving the plurality of fluid receiving components 210.

[0079] Embodiments of this application also provide a radioactive material dissolution system, which may include: multiple dissolution devices and a radioactive material concentration measuring device according to any embodiment of this 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 solutions of the multiple dissolution devices.

[0080] See Figure 7 The dissolving apparatus 10 provided in the embodiments of this application may include a body 11 for dissolving radioactive materials, a heat dissipation member 12 connected to the body 11, and a cover 14 for closing or opening the body 11. A seal 15 is formed between the cover 14 and the heat dissipation member 12. The heat dissipation member 12 is configured to diffuse the heat of the body 11 outward.

[0081] The dissolving apparatus 10 provided in the embodiments of this application can reduce the temperature at the seal 15 by using the heat dissipation component 12, thereby avoiding a significant shortening of the service life of the seal 15 due to the high temperature of the seal 15 caused by the introduction of high temperature mixed gas.

[0082] In some embodiments, the solution added to the dissolving device 10 for dissolving radioactive materials may be an acidic solution, such as nitric acid and hydrofluoric acid. In some embodiments, the dissolving device 10 may be located inside 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 seal 15 may be a rubber sealing ring. The seal 15 may be disposed on the heat sink 12.

[0085] See Figure 7 and Figure 8In some embodiments, the body 11 may form a dissolution tank 13 for containing a radioactive sample plate. In some embodiments, the dissolution apparatus 10 may further include a feed line 101 and an air inlet line 102. The feed line 101 is configured to connect the feeding system to the dissolution tank 13 in fluid communication to add a liquid for dissolving radioactive materials into the dissolution tank 13. The air inlet line 102 is configured to connect the gas supply system to the dissolution tank 13 in fluid communication to introduce a high-temperature mixed gas into the body 11.

[0086] In some embodiments, the dissolving apparatus 10 may further include a pressure measuring element for monitoring the pressure inside the dissolving tank 13. In some embodiments, a high-temperature mixed gas is introduced into the dissolving tank 13 under negative pressure through the air inlet pipe 102.

[0087] See Figure 8 In some embodiments, a connecting portion 125 is formed at the end of the heat sink 12 facing the body 11, and a connecting mating portion 113 is formed at the end of the body 11 facing the heat sink 12. The thickness of the connecting portion 125 is less than the thickness of other parts of the heat sink 12, and the thickness of the connecting mating portion 113 is less than the thickness of other parts of the body 11, to reduce heat conduction between them. This reduces direct heat transfer to the heat sink 12 and significantly lowers the temperature of the sealing member 15 through the heat dissipation effect of the heat sink 12.

[0088] In some embodiments, the connecting portion 125 may include a tapered segment extending in a direction close to the body 11 and an annular protrusion segment engaging with the tapered segment; the connecting mating portion 113 may include a tapered segment extending in a direction close to the heat sink 12 and an annular groove segment engaging with the tapered segment. The annular protrusion segment of the connecting portion 125 is embedded in the annular groove segment of the connecting mating portion 113, thereby both reducing the contact area between the two and facilitating a sealed connection between them.

[0089] In some embodiments, the heat sink 12 can dissipate heat from the melting tank 13 outwards. The heat sink 12 may include multiple heat dissipation sections to improve heat dissipation, significantly reduce the temperature of the seal 15, and prevent damage to the seal 15.

[0090] To reduce radioactive contamination, the radioactive sample plate needs to be dried in the dissolution tank 13 after dissolution. The inventors of this application discovered that the high temperature at the seal 15 during drying significantly shortens its lifespan. The dissolution apparatus 10 provided in this application, by incorporating a heat dissipation component 12, can reduce the temperature at the seal 15, thus preventing the significant shortening of the seal 15's lifespan due to the high temperature at the seal 15 during drying of the radioactive sample plate.

[0091] SeeFigure 7 and Figure 8 In some embodiments, the heat sink 12 may include a water-cooled heat sink 121, which may be disposed radially outside the dissolution tank 13 for supplying cooling water flow to diffuse heat from the dissolution tank 13 outwards. In some embodiments, the water-cooled heat sink 121 may include a water-cooling inlet and a water-cooling outlet. The heat sink 12 may also have a cooling water inlet 122 and a cooling water outlet 123, with the cooling water inlet 122 communicating with the water-cooling inlet of the water-cooled heat sink 121 and the cooling water outlet 123 communicating with the water-cooling outlet of the water-cooled heat sink 121. Cooling water can enter the water-cooled heat sink 121 through the cooling water inlet 122 and the water-cooling inlet, and the cooling water entering the water-cooled heat sink 121 can exchange heat with the dissolution tank 13 to diffuse heat from the dissolution tank 13 outwards. After heat exchange, the cooling water can leave the water-cooled heat sink 121 through the cooling water outlet 123 and the water-cooling outlet. In such embodiments, heat diffusion from the dissolution tank 13 can be achieved through cooling water heat exchange. See also Figure 9 In some embodiments, the water-cooled heat dissipation section 121 can be an annular water-cooled cavity.

[0092] See Figure 8 In some embodiments, the heat sink 12 may further include an air-cooled heat sink 124, which may be disposed between the melting tank 13 and the water-cooled heat sink 121. A temperature gradient can be formed at the air-cooled heat sink 124, which further diffuses the heat from the melting tank 13 outwards. In some embodiments, the air-cooled heat sink may be a heat dissipation chamber containing cold air. The cross-sectional shape of the air-cooled heat sink 124 may be L-shaped, with the long side of the L-shaped air-cooled heat sink 124 formed radially inside the water-cooled heat sink 121, and the short side of the air-cooled heat sink 124 formed on the side of the water-cooled heat sink 121 facing the melting tank 13. The long and short sides of the air-cooled heat sink 124 can form a temperature gradient, which further diffuses the heat from the melting tank 13 outwards.

[0093] See Figure 10 and Figure 11 In some embodiments, the body 11 may include two first side plates 111 and two second side plates 112 arranged opposite to each other, wherein the width of the first side plate 111 is greater than the length of the second side plate 112.

[0094] See Figure 7 and Figure 8In some embodiments, the dissolving apparatus 10 may further include a main body heating assembly 16, wherein there are two main body heating assemblies 16, each facing one of the two first side plates 111, for heating the two first side plates 111. This arrangement allows for a larger heating area and heat dissipation area of ​​the main body 11, which is beneficial for improving heating efficiency and heat dissipation efficiency.

[0095] See Figure 7 and Figure 8 In some embodiments, the main body heating assembly 16 may include multiple main body heating elements 161, main body heat conducting elements 162, main body insulation elements 163, and main body protective shell 164. The multiple main body heating elements 161 provide heat; the multiple main body heating elements 161 are disposed within the main body heat conducting elements 162, which are thermally connected to the two first side plates 111 to conduct the heat provided by the main body heating elements 161 to the first side plates 111; the main body insulation elements 163 are disposed outside the main body heat conducting elements 162 to insulate the main body heat conducting elements 162; and the main body protective shell 164 is disposed outside the main body insulation elements 163 to protect the main body insulation elements 163. In such embodiments, heating the main body 11 improves heating efficiency and insulation effect; and cooling the main body 11 facilitates rapid heat dissipation.

[0096] In some embodiments, the heat-conducting body 162 may have multiple openings along the height direction, and multiple body heating elements 161 may be respectively embedded in one opening. In some embodiments, the connector of the body heating element 161 may be configured as a quick-release type for easy inspection and maintenance.

[0097] The heating element 161 is, for example, an electric heating rod; the heat-conducting element 162 is, for example, graphite; and the insulation element 163 is, for example, insulation cotton.

[0098] In some embodiments, the body heating assembly 16 can be used to heat the body 11 when dissolving radioactive materials; 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 heats the body 11 at a dissolution temperature of 80–90°C. In some embodiments, when heating and drying a radioactive sample plate, the body heating assembly 16 heats the body 11 at a drying temperature of 170–180°C.

[0100] See Figure 11 and Figure 13In some embodiments, the two first side plates 111 of the main body 11 respectively form two opposing first limiting portions 1111, which sequentially divide the dissolving tank 13 into a first region 131, a second region 132, and a third region 133, which are interconnected. Liquid feed from the feed pipe 101 enters the first region 131 and can flow to the second region 132. High-temperature mixed gas from the gas inlet pipe 102 enters the second region 132, and a radioactive sample plate is disposed in the second region 132.

[0101] See Figure 7 In some embodiments, the dissolving device 10 may further include a return pipe 103 and an outlet pipe 104, which are respectively located in the third zone 133 and the first zone 131. The return pipe 103 is used to allow the liquid in the dissolving tank 13 to flow out of the dissolving tank 13, and the outlet pipe 104 is used to allow the liquid flowing out of the dissolving tank 13 to flow back into the dissolving tank 13. Since the return pipe 103 and the outlet pipe 104 are respectively located in the third zone 133 and the first zone 131, the flow of liquid between the three zones can be accelerated after the liquid flows out of the dissolving tank 13 and during the process of flowing back, thereby playing a role in stirring the liquid in the dissolving tank 13 and accelerating the dissolution of radioactive materials.

[0102] In some embodiments, a gap exists between two opposing first limiting portions 1111 on the two first side plates 111 to allow for the flow of the feed liquid. 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 dissolving tank 13 may be formed with an incline, and the inlet of the liquid outlet pipe 104 may be located at the lowest point of the incline of the bottom wall of the dissolving tank 13, so that the liquid can converge to the inlet of the liquid outlet pipe 104, which is beneficial to completely remove the dissolved liquid after dissolving is completed.

[0104] See Figure 11 and Figure 13 In some embodiments, the two first side plates 111 of the body 11 may also form opposing second limiting portions 1112, which are located within the second region 132 and are used to restrict the movement of the radioactive sample plate toward the first side plates 111, so that the radioactive sample plate can stand upright in the second region 132. In some embodiments, there is a gap between the two opposing 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 protrusion forms an inclined surface on the end face of the heat sink 12 to guide the radioactive sample plate so that the radioactive sample plate can enter between the two oppositely arranged second limiting portions 1112.

[0106] See Figure 7 and Figure 14 In some embodiments, the dissolution tank 13 may have a top opening, and a cover 14 is used to close the top opening of the dissolution tank 13. A radioactive sample plate can be inserted into the second zone 132 through the top opening. In some embodiments, the cover 14 is connected to a lifting mechanism to achieve overall lifting and lowering movement of the cover 14, thereby closing or opening the top opening of the dissolution tank 13.

[0107] See Figure 7 and Figure 8 In some embodiments, the cover 14 may include a cover plate 141 and a cover plate heating assembly 142, the cover plate heating assembly 142 being disposed on the cover plate 141 for heating the cover plate 141.

[0108] The inventors of this application discovered that condensation remains on the inner surface of the cover plate 141 after the radioactive sample plate has been dried. Even with extended drying time, it is difficult for the inside of the cover plate 141 to be completely dried. This poses a radioactive contamination problem. The inventors of this application further discovered that this is because the cover plate 141 is located in the external environment during the drying of the radioactive sample plate. Since the cover plate 141 is usually made of metal, which conducts heat quickly, the temperature of the cover plate 141 is relatively low. This results in condensation remaining on the inner surface of the cover plate 141 after drying.

[0109] The dissolving apparatus 10 provided in the embodiments of this application heats the cover plate 141 by setting the cover plate heating assembly 142 to increase the temperature of the cover plate 141, which can avoid the formation of condensate 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 at a temperature 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 Figure 8 and Figure 13In some embodiments, the cover plate heating assembly 142 may include a cover plate heating element 1421, a cover plate heat-conducting element 1422, a cover plate insulation element 1424, and a cover plate protective shell 1423. The cover plate heating element 1421 provides heat; the cover plate heat-conducting element 1422 is thermally connected to the cover plate 141 to conduct the heat provided by the cover plate heating element 1421 to the cover plate 141; the cover plate insulation element 1424 is disposed outside the cover plate heat-conducting element 1422 to insulate the cover plate heat-conducting element 1422; and the cover plate protective shell 1423 is disposed outside the cover plate insulation element 1424 to protect the cover plate insulation element 1424. The cover plate heating element 1421 may be, for example, an electric heating rod. The material of the cover plate heat-conducting element 1422 may be, for example, graphite.

[0112] In some embodiments, a plurality of openings may be formed on the cover heat conductor 1422 along the height direction, and a plurality of cover heating elements 1421 may be respectively embedded in one of the openings. In some embodiments, the cover heating assembly 142 may further include: a temperature measuring element disposed in the cover heat conductor 1422 for detecting the temperature of the cover heat conductor 1422.

[0113] See Figure 7 , Figure 8 as well as Figure 12 In some embodiments, the dissolving apparatus 10 may further include an air-cooling assembly 17 for dissipating heat from the body 11 outwards. The air-cooling assembly 17 includes an inlet pipe 171, an outlet pipe 172, and a cooling pipe 173. The inlet pipe 171 is located at the end of the body insulation member 163 away from the heat sink 12, the outlet pipe 172 is located at the end of the body insulation member 163 close to the heat sink 12, and the cooling pipe 173 is located inside the body insulation member 163. The inlet pipe 171 is connected to and in fluid communication with the cooling pipe 173, allowing gas to flow through the inlet pipe 171 to the cooling pipe 173. The cooling pipe 173 has multiple through holes, allowing gas entering the cooling pipe 173 to flow out through the through holes and dissipate heat from the body 11, thereby dissipating heat from the body 11 outwards. After heat dissipation, the gas can flow out of the air-cooling assembly 17 through the outlet pipe 172. This configuration allows for heat exchange between the gas and the main body 11, which is beneficial for further rapid heat dissipation of the main body 11.

[0114] After one dissolution process is completed, the temperature of the dissolution tank 13 is high because the heating assembly 16 heats the body 11 during the dissolution process to dry the radioactive sample plate. During the next dissolution, when an acidic solution is introduced into the dissolution tank 13 under negative pressure, the high temperature within the tank causes the acidic solution to vaporize, forming acidic gas. This acidic gas is drawn away under negative pressure and cannot be recovered.

[0115] To shorten the time interval between the two dissolution processes and prevent the acidic solution added in the next step from vaporizing and generating acidic gas at a high temperature, the dissolution apparatus 10 provided in this application includes an air-cooling component 17. This allows for heat exchange between the gas and the main body 11, facilitating rapid heat dissipation from the main body 11. After the temperature of the main body 11 has decreased to a suitable level, the acidic solution is introduced into the dissolution tank 13 under negative pressure, preventing vaporization of the acidic solution due to high temperature.

[0116] See Figure 12 In some embodiments, the main body insulation component 163 may include an insulation body 1631 and a plurality of partition plates 1632. The plurality of partition plates 1632 are connected to the insulation body 1631, and the plurality of partition plates 1632 and the insulation body 1631 together form a plurality of heat dissipation channels 1633. In some embodiments, the cooling air pipe 173 is in fluid communication with the heat dissipation channels 1633, and the gas entering the cooling air pipe 173 can enter the heat dissipation channels 1633 through through holes; the heat dissipation channels 1633 are also in fluid communication with the air outlet pipe 172, and the gas entering the heat dissipation channels 1633 can flow out through the air outlet pipe 172.

[0117] See Figure 7 In some embodiments, the dissolving apparatus 10 may further include an extraction pipe 105 and a venting pipe 106, which are in fluid communication with the dissolving tank 13. Gas in the dissolving tank 13 can flow out of the dissolving tank 13 through the extraction pipe 105, thereby creating a negative pressure environment in the dissolving tank 13. The venting pipe 106 is also in fluid communication with a glove box, allowing gas in the glove box to enter the dissolving tank 13 through the venting pipe 106, thereby changing the dissolving tank 13 from a negative pressure environment to a normal pressure environment. In some embodiments, the extraction pipe 105 and the venting pipe 106 may be disposed on the heat sink 12.

[0118] See Figure 13 In some embodiments, the dissolving device 10 further includes two side insulation members 108, which are respectively fixedly disposed on the two second side plates 112 for heat preservation of the second side plates 112. Since the length of the second side plate 112 is less than the length of the first side plate 111, the side insulation members 108 have little impact on the heat dissipation of the body 11.

[0119] See Figure 7 In some embodiments, the dissolving device 10 may further include a side protective shell 109 disposed outside the side insulation member 108 for protecting the side insulation member 108.

[0120] See Figure 8 In some embodiments, the dissolving apparatus 10 may also include a bottom heat preservation member 107 disposed at the bottom of the body 11 for heat preservation of the dissolving tank 13.

[0121] Regarding the embodiments of this application, it should also be noted that, without conflict, the embodiments of this application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0122] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. The scope of protection of this application shall be determined by the scope of the claims.

Claims

1. A device for measuring the concentration of a radioactive substance, characterized in that, include: Install base plate; A retainer is movably disposed on the mounting base plate; the retainer forms a retaining groove extending along a first direction, and the retainer also forms a plurality of through-hole groups spaced apart along the first direction, each of the through-hole groups including two through holes disposed opposite to each other along a second direction, the second direction being perpendicular to the first direction; Multiple fluid receivers are disposed in the holding groove along the first direction and are respectively used to receive fluids carrying radioactive materials. Each fluid receiver has two windows disposed opposite to each other along the second direction for X-rays to pass through. Each fluid receiver is placed in the two windows and faces the two through holes of each through hole group respectively. An X-ray emitter and an X-ray receiver are disposed on the mounting base plate. The X-ray emitter and the X-ray receiver are disposed opposite to each other on both sides of the retainer along the second direction. The X-ray emitter emits X-rays into one window of the fluid receiver, and the X-ray receiver receives X-rays transmitted through the other window to determine the intensity change of the X-rays after passing through the two windows. The concentration of the radioactive material is then determined based on 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, such that the two through holes of each of the through-hole groups 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 radioactive material in either of the fluid receiving members; The fluid receiving device includes an inlet pipe, an outlet pipe, an exhaust pipe, and a body. The body has a through groove extending through the body along the second direction, a through hole extending through the body along the third direction, a first connecting channel connecting the through groove and the through hole, and a second connecting channel communicating with the through groove. Two windows are respectively sealed on both sides of the through groove to form a receiving cavity together with the through groove. The second connecting channel is in fluid communication with the outlet pipe. The upper end of the through hole is in fluid communication with the exhaust pipe. The lower end of the through hole is in fluid communication with the inlet pipe. The third direction is perpendicular to the first direction and the second direction.

2. The apparatus according to claim 1, characterized in that, The X-ray emitting device is configured such that the energy range of the emitted X-rays includes the L-layer absorption limit of the radioactive element.

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

4. The apparatus according to claim 1, characterized in that, The X-ray emitting element includes an emitting window, and the X-ray receiving element includes a receiving window; The device further includes: The emitting fixture and the receiving fixture are mounted on the mounting base plate and are used to fix the X-ray emitting component and the X-ray receiving component, respectively. The emitting fixture forms an X-ray emitting channel, which is positioned opposite to the emitting window of the X-ray emitting fixture; The receiving fixture forms an X-ray receiving channel, and the X-ray receiving channel is positioned opposite to the receiving window of the X-ray receiving fixture. The X-ray receiving channel faces the X-ray emitting channel.

5. The apparatus according to claim 4, characterized in that, The receiving fixture also has a receiving groove, and the receiving window of the X-ray receiver can enter the receiving groove and face the X-ray receiving channel.

6. The apparatus according to claim 5, characterized in that, The device further includes: A base, the retainer being connected to the base, the base forming an opening for the passage of the inlet and outlet pipes of each fluid receiver; Two supporting base plates are detachably connected to the base on both sides of the base, and the supporting base plates are movably mounted on the mounting base plate; The mounting base plate is provided with clearance holes to provide movement space for the inlet and outlet pipes of the fluid receiving component.

7. The apparatus according to claim 6, characterized in that, The supporting base plate is provided with a sliding component, and the mounting base plate is provided with a sliding mating component. Through the cooperation of the sliding component and the sliding mating component, the supporting base plate is movably mounted on the mounting base plate.

8. The apparatus according to claim 6, characterized in that, The launching fixture has a first clearance groove, and the receiving fixture has a second clearance groove. The first clearance groove and the second clearance groove are used to provide sliding space for the supporting base plate.

9. A radioactive material dissolution system, characterized in that, include: Multiple dissolving devices, each configured to provide a dissolving space for the radioactive material. ； The radioactive material concentration measuring device according to any one of claims 1-8 is configured to measure the concentration of radioactive material in the solution of the plurality of dissolving devices.

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

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