Ex-reactor helium and xenon activated product deposition experimental device and experimental method

Abstract

The invention relates to the technical field of radiochemistry, in particular to an out-of-pile helium and xenon activated product deposition experimental device and experimental method. The out-of-pile helium-xenon activated product deposition experiment device comprises a thermal insulation body, a volatilization vessel, a cover body, a gas supply mechanism, a pressure release valve and a monitoring mechanism, the thermal insulation body is provided with a deposition tank; the volatilization vessel is placed in the deposition tank, and the volatilization vessel is used for loading nuclide; the cover body is connected with the heat preservation body so as to block the deposition tank, and a hanging piece located in the deposition tank is connected to the cover body; an output port of the gas supply mechanism is communicated with the deposition tank so as to supply high-pressure inert gas into the deposition tank; the pressure release valve is communicated with the deposition tank; and the monitoring mechanism is connected with the cover body and is used for monitoring experimental environment parameters in the deposition tank. The device can simulate the influence of deposition of the nuclide activation product on the experiment piece in the actual working condition, and has the advantages of simple structure and good use safety.

Description

Technical Field

[0001] This application relates to the field of radiochemistry technology, specifically to an experimental apparatus and method for depositing helium-xenon activation products outside the reactor. Background Technology

[0002] Helium-xenon mixtures are a major candidate for fourth-generation gaseous working fluid-cooled reactors. He has a low neutron absorption cross section and is less affected by neutron irradiation in the reactor. However, natural Xe contains stable isotopes with large neutron absorption cross sections, such as Xe-124 and Xe-131, which absorb neutrons during long-term reactor operation, leading to persistent physicochemical problems. Xe activation produces new elements such as I and Te, and the diffusion and deposition of these new elements may affect the reactor's heat transfer performance and damage the in-core wetting materials. Currently, there is no research on the impact of the diffusion and deposition behavior of new elements generated by xenon neutron absorption in helium-xenon cooled reactors on the wetting materials; this research direction is essentially blank. Therefore, it is necessary to focus on the new elements in xenon activation products and conduct in-core wetting material research under high temperature and high pressure environments to obtain the impact of xenon-activated new elements on the in-core wetting materials, thereby providing necessary support for the design of reactors using helium-xenon mixtures as coolants. Summary of the Invention

[0003] This application aims to solve at least one of the technical problems in the background art by providing an experimental apparatus and method for depositing helium-xenon activation products outside the reactor.

[0004] This application is achieved through the following technical solution:

[0005] In a first aspect, this application provides an experimental apparatus for the deposition of helium-xenon activation products outside the reactor core, comprising:

[0006] Thermal insulation body, the thermal insulation body having a deposition tank;

[0007] A volatile dish, placed in the deposition tank, the volatile dish being used to load nuclides;

[0008] A cover body, which is connected to the insulation body to seal the sedimentation tank, and a hanging device located inside the sedimentation tank is connected to the cover body;

[0009] A gas supply mechanism, the output port of which is connected to the sedimentation tank to supply high-pressure inert gas into the sedimentation tank;

[0010] A pressure relief valve, which is connected to the sedimentation tank;

[0011] A monitoring mechanism is connected to the cover and is used to monitor experimental environmental parameters within the sedimentation tank.

[0012] This application provides an external helium-xenon activation product deposition experimental apparatus. The insulation body and cover provide a high-temperature, sealed environment. Through the coordination of a gas supply mechanism, the deposition tank is kept in a high-temperature, high-pressure sealed environment to accurately simulate the actual working environment of the in-pile wetting material. Iodine and tellurium are loaded into a volatilization dish. Under high temperature and pressure, the iodine and tellurium volatilize and deposit on the surface of the experimental piece, thus simulating the effect of iodine and tellurium deposition on the surface of the experimental piece under actual working conditions. Simultaneously, the application utilizes a monitoring mechanism to acquire experimental environmental parameters within the deposition tank in real time, facilitating correction of these parameters and ensuring a stable experimental environment for the experimental piece, thereby improving the accuracy of experimental results. Furthermore, the inclusion of a pressure relief valve significantly reduces the safety risks associated with using this experimental apparatus.

[0013] In some alternative embodiments, heating elements are connected to the walls of the deposition tank, and the heating elements are arranged around the evaporation dish.

[0014] In some alternative embodiments, the heating element is configured as a resistance wire;

[0015] Multiple heating elements are arranged parallel to each other along the depth of the deposition tank, with each heating element arranged around the volatilization dish; or

[0016] The heating element is arranged in a spiral coil on the wall of the deposition tank.

[0017] In some alternative embodiments, the insulation body is configured as a ceramic fiber body, a silicate body, or a glass fiber body.

[0018] In some alternative embodiments, the hanger is constructed as an L-shaped rod, wherein the longer section of the hanger is connected to the cover, and the angle between the longer and shorter sections of the hanger is an acute angle.

[0019] In some optional embodiments, the angle between the long and short sections of the hanging member is 60° to 85°.

[0020] In some alternative embodiments, the deposition tank is configured to withstand a maximum pressure of not less than 5 MPa.

[0021] In some alternative embodiments, the cover is configured as a flange.

[0022] In some optional embodiments, a back pressure valve is also included, which is connected to the deposition tank, wherein the pipeline length between the back pressure valve and the insulation body is not less than 1m.

[0023] In some alternative embodiments, a temperature control component is also included, which is connected to the cover to achieve temperature control within the deposition tank.

[0024] Secondly, this application provides an experimental method for depositing helium-xenon activation products outside the reactor core, implemented based on any of the experimental apparatus for depositing helium-xenon activation products outside the reactor core in the first aspect, characterized by comprising the following:

[0025] Pre-treatment of the experimental specimens;

[0026] Nuclide is loaded into a volatilization dish and placed in a deposition tank;

[0027] The various experimental components were hung one by one on the mounting bracket;

[0028] Connect the cover plate to keep the sedimentation tank in a sealed environment;

[0029] Set the maximum pressure relief value of the pressure relief valve;

[0030] High-pressure inert gas is supplied into the sedimentation tank through a gas supply mechanism;

[0031] The space inside the sedimentation tank is heated according to the predetermined heating time and heating temperature;

[0032] After the sample has cooled in the deposition tank, it is removed and its surface is subjected to microscopic analysis.

[0033] In some optional embodiments, the following is included before pretreatment of the experimental specimen:

[0034] Connect the cover plate to keep the sedimentation tank in a sealed environment;

[0035] A rotor flow meter, a first container, and a second container are connected in one step between the outlet of the gas supply mechanism and the sedimentation tank. The first container is used to load a high-concentration acid solution, and the second container is used to load a potassium permanganate solution.

[0036] High-pressure, high-temperature inert gas is supplied through a gas supply system until the volume of the high-pressure inert gas is not less than 20 times the volume of the sedimentation tank;

[0037] After cooling down, the gas in the sedimentation tank is discharged through the pressure relief valve and the cover plate is removed.

[0038] In some optional embodiments, pretreatment of the experimental specimen includes the following:

[0039] Provide multiple test pieces and perform grinding and polishing treatments on the test pieces;

[0040] Divide multiple experimental items into multiple groups, with each group containing no fewer than two experimental items;

[0041] Each group of experimental pieces was immersed in nitric acid solution for different durations.

[0042] The experimental pieces were ultrasonically cleaned using deionized water.

[0043] Dry the test specimens.

[0044] In some optional embodiments, multiple test specimens are divided into four groups; the test specimens in each group are immersed in nitric acid solution for 0 min, 5 min, 10 min and 45 min respectively.

[0045] Compared with the prior art, this application has the following advantages and beneficial effects:

[0046] This application provides an experimental apparatus and method for depositing helium-xenon activation products outside the reactor core. The insulation body and cover provide a high-temperature, sealed environment. Through the coordination of the gas supply mechanism, the deposition tank is kept in a high-temperature, high-pressure, sealed environment to accurately simulate the actual working environment of the in-reactor wetting material. Iodine and tellurium are loaded into the volatilization dish. Under high temperature and pressure, the iodine and tellurium volatilize and deposit on the surface of the experimental piece, thus simulating the effect of iodine and tellurium deposition on the surface of the experimental piece under actual working conditions. At the same time, this application can acquire the experimental environment parameters in the deposition tank in real time through the setting of the monitoring mechanism, which facilitates the correction of the experimental environment parameters in the deposition tank, ensures that the experimental piece is in a stable experimental environment, and helps to improve the accuracy of the experimental results. In addition, the setting of the pressure relief valve can significantly reduce the safety risks when using this experimental apparatus. Attached Figure Description

[0047] To more clearly illustrate the technical solutions of the exemplary embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0048] Figure 1 This is a schematic diagram of the experimental apparatus for depositing helium-xenon activation products outside the reactor core, as provided in an embodiment of this application.

[0049] The attached diagram shows the markings and corresponding component names:

[0050] 1-Manual valve, 2-Volatile dish, 3-Lid, 4-Pressure relief valve, 5-Monitoring mechanism, 6-Hanging component, 7-Insulation body, 8-Experimental piece, 9-Back pressure valve, 10-Temperature control component, 11-Deposition tank. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this application are only for explaining this application and are not intended to limit this application.

[0052] Firstly, such as Figure 1 As shown in the figure, this application provides an external helium-xenon activation product deposition experimental device, which includes an insulation body 7, a volatilization dish 2, a cover 3, a gas supply mechanism, a pressure relief valve 4, and a monitoring mechanism 5.

[0053] The insulation body 7 has a deposition tank 11. In actual implementation, the insulation body 7 is cylindrical in shape. The deposition tank 11 is formed by opening inward from one end of the insulation body 7 along its axial direction. The shape of the deposition tank 11 is not limited, and can be, for example, a circle, a square, a triangle, an ellipse, etc. During the experimental stage, a high temperature and high pressure experimental environment needs to be provided in the deposition tank 11. In order to ensure that the deposition tank 11 has high pressure resistance, in this embodiment, the shape of the deposition tank 11 is preferably set to be circular. When the shape of the deposition tank 11 is set to be circular, the deposition tank 11 is coaxially opened inward from one end of the insulation body 7 along its axial direction, so as to ensure that the deposition tank 11 has the same thickness of insulation material in any radial direction, and to ensure the temperature uniformity of the deposition tank 11 in the circumferential direction.

[0054] The evaporation dish 2 is placed in the deposition tank 11. The evaporation dish 2 is used to load nuclides. Since the embodiments of this application mainly explore the effect of the new elements iodine and tellurium generated by the activation of the nuclide xenon on the wetting material, the evaporation dish 2 is mainly used to load elemental iodine and elemental tellurium. In other embodiments, other elemental or non-elemental substances can also be loaded in the evaporation dish 2 as needed. In actual implementation, the evaporation dish 2 is a circular vessel, and the diameter and depth of the inner side of the evaporation dish 2 meet the requirements of 5mm*5mm~20mm*20mm.

[0055] The cover 3 is connected to the insulation body 7 to seal the sedimentation tank 11. When the sedimentation tank 11 is circular, the cover 3 is a circular plate adapted to the shape of the sedimentation tank 11. The cover 3 and the insulation body 7 can be bolted together. In actual implementation, the cover 3 can be a flange that is readily available in the prior art. To ensure that the sedimentation tank 11 has excellent sealing performance after the cover 3 is connected, a high-temperature resistant, high-pressure resistant, and corrosion-resistant sealing material, such as a nickel-based alloy, tantalum, or other metal sealing ring, can be configured between the cover 3 and the insulation body 7. Non-metallic sealing rings such as graphite and silicon carbide, or composite material sealing rings such as metal spiral wound gaskets and flexible graphite composite gaskets; the cover 3 is connected to a hanging member 6 located in the deposition tank 11, that is, the cover 3 is connected to the insulation body 7, and the hanging member 6 is located in the deposition tank 11. The hanging member 6 can be detachably connected to the cover 3 or fixedly connected. In actual implementation, a fixed connection is preferred to ensure that after the experimental piece 8 is hung on it, the experimental piece 8 can maintain a stable position under high temperature and high pressure. For example, the hanging member 6 can be welded to the cover 3.

[0056] The output port of the gas supply mechanism is connected to the sedimentation tank 11 to supply high-pressure inert gas to the sedimentation tank 11. In actual implementation, a manual valve 1 is used as a gas switch between the output port of the gas supply mechanism and the sedimentation tank 11. This can quickly and effectively cut off the gas path. For example, in the event of delay, failure, or power failure in the control system, the gas path can be quickly cut off by the manual valve 1, which can improve experimental safety. The manual valve 1 can be selected from valves such as pressure reducing valves or shut-off valves.

[0057] The pressure relief valve 4 is connected to the deposition tank 11. In actual implementation, the air inlet of the pressure relief valve 4 passes through the cover 3 and is located in the deposition tank 11. The pressure relief valve 4 and the cover 3 are sealed together, so the pressure in the deposition tank 11 can be regulated through the pressure relief valve 4. For example, when the pressure in the deposition tank 11 exceeds the limit, the pressure relief valve 4 can be triggered to keep the deposition tank 11 below the upper pressure limit. This not only ensures the safety of the entire experimental process, but also ensures that the deposition tank 11 is always at the desired pressure value, providing precise experimental adjustment for the deposition experiment and helping to improve the accuracy of the experimental results.

[0058] The monitoring mechanism 5 is connected to the cover 3 and is used to monitor the experimental environmental parameters inside the sedimentation tank 11. The monitoring mechanism 5 is mainly used to detect the air pressure and temperature inside the sedimentation tank 11. For example, the monitoring mechanism 5 may include a barometer and a thermometer, which can be connected to the cover 3 respectively. The detection probes of the barometer and thermometer are placed inside the sedimentation tank 11 to obtain the actual temperature and actual air pressure inside the sedimentation tank 11 in real time. Based on the feedback parameters from the barometer and thermometer, the controller or experimenter can promptly correct the pressure or temperature inside the sedimentation tank 11 by adjusting the operating parameters of the gas supply mechanism and heating equipment. The accuracy of the barometer is 1.01 bar to 0.1 bar. In other embodiments, the monitoring mechanism 5 may also include a stress sensor, a temperature and humidity sensor, etc., to monitor other experimental environmental parameters.

[0059] This application provides an external helium-xenon activation product deposition experimental apparatus. The insulation body 7 and the cover 3 provide a high-temperature sealed environment. Through the coordination of the gas supply mechanism, the deposition tank 11 is kept in a high-temperature and high-pressure sealed environment to accurately simulate the actual working environment of the in-pile wetting material. Iodine and tellurium are loaded in the volatilization dish 2. Under high temperature and pressure, the iodine and tellurium volatilize and deposit on the surface of the experimental piece 8, which can simulate the effect of the deposition of iodine and tellurium on the surface of the experimental piece 8 under actual working conditions. At the same time, the application can obtain the experimental environment parameters in the deposition tank 11 in real time through the setting of the monitoring mechanism 5, so as to facilitate the correction of the experimental environment parameters in the deposition tank 11, ensure that the experimental piece 8 is in a stable experimental environment, and improve the accuracy of the experimental results. In addition, the application can significantly reduce the safety risks when using the experimental apparatus through the setting of the pressure relief valve 4.

[0060] In some alternative embodiments, a heating element is connected to the wall of the deposition tank 11, and the heating element is arranged around the evaporation dish 2.

[0061] In this embodiment, the heating element is disposed in the deposition tank 11, which can directly heat the internal space of the deposition tank 11 and has high heating efficiency. The heating element is arranged around the volatilization dish 2, which can make the temperature rise uniformly in all parts of the internal space of the deposition tank 11. In actual implementation, the number of heating elements can be one or more. For example, the heating element can be configured as a resistance wire, and the number of resistance wires can be one or more. When the number of resistance wires is one, the resistance wire can be spirally coiled on the tank wall of the deposition tank 11 to form a circle around the volatilization dish 2. When the number of resistance wires is multiple, each resistance wire is a ring, and multiple resistance wires are coaxially arranged in the deposition tank 11 and equidistantly arranged in the depth direction of the deposition tank 11. The wires of the heating element pass through the cover 3 and are sealed with the cover 3.

[0062] In some alternative embodiments, the insulation body 7 is configured as a ceramic fiber body, a silicate body, or a glass fiber body.

[0063] In this embodiment, an outer shell is connected to the outside of the insulation body 7. The outer shell can be made of 304 stainless steel or 304L stainless steel, which can protect the insulation body 7 and isolate it from the external environment to prevent burns caused by accidental contact by experimental personnel. In actual experiments, the internal temperature of the insulation body 7 is generally 500~1000℃. Depending on the needs, the outer shell can be designed with different thicknesses to control the temperature of the outer shell material to a range not exceeding 60℃. Among them, when the insulation body 7 uses a ceramic limiting body, it has good high temperature resistance, low thermal conductivity, low density, and good thermal stability. When using silicate, due to its microporous network structure, it has good thermal insulation performance, which can effectively reduce heat transfer and reduce heat loss in the deposition tank 11. At the same time, it also has the advantage of strong adhesion, which can be well combined with the outer shell and is easy to implement. When using glass fiber, the thermal insulation performance can also be guaranteed. At the same time, the cost of glass fiber is relatively low, which can reduce the overall manufacturing cost of the device.

[0064] In some alternative embodiments, the hanging member 6 is constructed as an L-shaped rod, wherein the long section of the hanging member 6 is connected to the cover 3, and the angle between the long section and the short section of the hanging member 6 is an acute angle.

[0065] In this embodiment, there are multiple hanging components 6. When the cover 3 is a circular plate structure, multiple hanging components 6 are evenly distributed around the axis of the cover 3. The long rod of each hanging component 6 is perpendicularly connected to the cover 3, so that after the cover 3 is connected to the insulation body 7, multiple hanging components 6 will be evenly distributed around the evaporation dish 2, ensuring that each hanging component 6 has basically the same test conditions. When the angle between the long rod and the short rod is set to an acute angle, it can effectively prevent the experimental piece 8 from accidentally falling off during the test, ensuring that the test process proceeds smoothly. In actual implementation, the experimental piece 8 has hanging holes. The experimental piece 8 is hung on the short rod of the hanging component 6 through the hanging holes. The interface shape of the hanging component 6 is circular, which means that the hanging component 6 can be formed by bending the circular rod. The circular rod has a smooth and uniform surface. Under high temperature and high pressure environment, the expansion stress is uniform, and local stress concentration is not easy to occur, which can ensure the structural integrity of the hanging component 6, thereby avoiding the application of pressure to the experimental piece 8 due to the deformation of the hanging component 6, and thus ensuring the structural integrity of the experimental piece 8.

[0066] Preferably, the angle between the long section and the short section of the hanging member 6 is 60° to 85°.

[0067] In this embodiment, when the angle between the long and short rods is 85°, it ensures that the experimental piece 8 will not fall accidentally. When the angle between the long and short rods is 60°, there is a relatively large space at the bend of the long and short rods, which ensures that the experimental piece 8 has a stable posture after being hung, and the compressive stress between the experimental piece 8 and the long and short rods can meet expectations, thereby avoiding the impact on the experimental results caused by the large compressive stress formed between the experimental piece 8 and the hanging part 6.

[0068] In some alternative embodiments, the deposition tank 11 is configured to withstand a maximum pressure of not less than 5 MPa.

[0069] In this embodiment, the radial thickness of the insulation body 7 can be designed so that the maximum bearing pressure in the deposition tank 11 is not less than 5 MPa.

[0070] In some optional embodiments, the extra-pile helium-xenon activation product deposition experimental apparatus further includes a back pressure valve 9, which is connected to the deposition tank 11. In actual implementation, the air inlet of the back pressure valve 9 passes through the cover 3 and is located in the deposition tank 11. The air inlet pipe of the back pressure valve 9 is sealed to the cover 3. The control pressure range of the back pressure valve 9 is 0~5MPa. The pipeline length between the back pressure valve 9 and the insulation body 7 is not less than 1m.

[0071] In this embodiment, the back pressure valve 9 can further prevent the pressure in the deposition tank 11 from being too high or too low, and can maintain the pressure in the deposition tank 11 to be stable. This not only ensures experimental safety, but also maintains a stable temperature environment in the deposition tank 11, which is conducive to ensuring that the experimental results have good accuracy.

[0072] In some optional embodiments, the extra-pile helium-xenon activation product deposition experimental apparatus further includes a temperature control component 10, which is connected to the cover 3 to achieve temperature control within the deposition tank 11. In actual implementation, the temperature control component 10 can be an electronic temperature controller readily available in the prior art. The electronic temperature controller collects temperature data within the deposition tank 11 and adjusts the ambient temperature within the deposition tank 11 in real time to ensure that the temperature within the deposition tank 11 is stable at the desired value or within the desired range, which will help improve the reliability of the experimental results.

[0073] Secondly, embodiments of this application provide an extra-pile helium-xenon activation product deposition experimental method, implemented based on any of the extra-pile helium-xenon activation product deposition experimental apparatus of the first aspect, characterized by including the following:

[0074] S1. Perform pretreatment on experimental piece 8.

[0075] In this embodiment, there are 8 test pieces 8, and the material of the test pieces 8 is Ni617 alloy. The 8 test pieces 8 are polished to a precision of 3000 mesh. The 8 test pieces 8 are divided into four groups, that is, each group contains two test pieces 8. The test pieces 8 are immersed in 5mol / L nitric acid for 80min, 5min, 10min and 45min respectively. After immersion, they are ultrasonically cleaned with deionized water for 10min. After cleaning, the test pieces 8 are dried by drying or blow-drying with a hair dryer.

[0076] S2. Load the nuclide into the volatile dish 2 and place the volatile dish 2 into the deposition tank 11.

[0077] In this embodiment of the application, the nuclide loaded in the volatile dish 2 is elemental tellurium, with a weight of 0.1g; the volatile dish 2 is placed in the middle of the bottom of the deposition tank 11.

[0078] S3. Hang multiple test pieces 8 one by one on the hanging piece 6.

[0079] S4. Connect the cover plate to make the sedimentation tank 11 a sealed environment.

[0080] S5. Set the maximum pressure relief value of pressure relief valve 4.

[0081] S6. High-pressure inert gas is supplied to the sedimentation tank 11 through the gas supply mechanism.

[0082] In this embodiment, the gas supply mechanism uses a steel gas cylinder, which contains high-pressure inert gas. The steel gas cylinder is connected to the sedimentation tank 11 via a manual valve 1, and a pressure reducing valve is installed on the steel gas cylinder. When supplying inert gas, the pressure reducing valve on the steel gas cylinder and the manual valve 1 are opened. The pressure gauge is set to 0.8 MPa. After the pressure in the sedimentation tank 11 stabilizes, the manual valve 1 and the pressure reducing valve are closed in sequence.

[0083] S7. Heat the space inside the sedimentation tank 11 according to the predetermined heating time and heating temperature.

[0084] In this embodiment, the heating temperature is set to 800℃ and the holding time is set to 48h; after reaching the heating temperature, the pressure in the sedimentation tank 11 should be 3MPa without depressurization.

[0085] S8. After the deposition tank 11 has cooled down, take out the experimental piece 8 and perform microscopic analysis on the surface of the experimental piece 8.

[0086] In this embodiment of the application, microscopic analysis can be performed using XPS to evaluate the interaction between tellurium and experimental specimen 8.

[0087] If the experimental setup is to be used a second time, the deposition tank 11 should be cleaned before pretreatment of the experimental specimen 8 to avoid the previous experiment affecting the current experiment. Specifically, this includes the following:

[0088] S10. Connect the cover plate to make the sedimentation tank 11 a sealed environment.

[0089] S11. Connect a rotor flow meter, a first container, and a second container between the gas supply mechanism output port and the sedimentation tank 11. The first container is used to load a high-concentration acid solution, and the second container is used to load a potassium permanganate solution.

[0090] In actual operation, the first container is filled with 500 mL of 3 mol / L nitric acid solution, and the second container is filled with 500 mL of 1 mol / L potassium permanganate solution.

[0091] S12. High-pressure, high-temperature inert gas is supplied through a gas supply mechanism until the volume of the high-pressure inert gas is not less than 20 times the volume of the sedimentation tank 11; wherein, the temperature inside the sedimentation tank 11 is heated to 800℃, the flow rate of the high-pressure inert gas is 0.1L / min, and it is maintained for 2 hours.

[0092] S13. After cooling down, the gas in the sedimentation tank 11 is discharged through the pressure relief valve 4 and the cover plate is removed.

[0093] In summary, the out-of-pile helium-xenon activation product deposition experimental apparatus and method provided in this application ensure the stability and consistency of the experimental environment by precisely controlling the temperature and pressure within the deposition tank 11, thereby providing high-precision experimental conditions for simulating actual working conditions. The precise control of temperature and pressure, combined with real-time monitoring and feedback adjustment functions, allows for timely correction of experimental environmental parameters, ensuring the accuracy of experimental results. The deposition tank 11 adopts a circular design, ensuring temperature uniformity and high pressure resistance, with a maximum bearing pressure of not less than 5 MPa, capable of withstanding high-temperature and high-pressure environments. Simultaneously, the use of high-temperature, high-pressure, and corrosion-resistant sealing materials, along with the establishment of a safe pressure relief mechanism, greatly improves experimental safety. Furthermore, the volatile matter dish 2 can hold various nuclides or other substances, the insulation body 7 can be made of various insulation materials, and the design of the hanging component 6 ensures the stable placement of the experimental component 8, meeting different experimental requirements. In terms of experimental operation, the manual valve 1 allows for rapid gas path cutoff, improving safety; the ease of cleaning and reuse enhances the reusability of the device and the reliability of the experiment; the circular cross-section design of the mounting component 6 prevents pressure on the experimental specimen 8 due to deformation of the mounting component 6, ensuring the structural integrity of the experimental specimen 8. Ultimately, through uniform heating and deposition, as well as precise microscopic analysis, this device significantly improves the accuracy and reliability of experimental results, providing strong support for research in related fields.

[0094] The specific embodiments described above illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details are included in the above description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0095] It should be noted that in this specification, similar reference numerals and letters in the above figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this application, it should be noted that unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0096] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An experimental apparatus for the deposition of helium-xenon activation products outside the reactor core, characterized in that, include: The insulation body (7) has a sedimentation tank (11); A volatile dish (2) is placed in the deposition tank (11) and is used to load nuclides; Cover (3), the cover (3) is connected to the insulation body (7) to seal the sedimentation tank (11), and the cover (3) is connected to a hanging part (6) located in the sedimentation tank (11). A gas supply mechanism, the output port of which is connected to the sedimentation tank (11) to supply high-pressure inert gas into the sedimentation tank (11); Pressure relief valve (4), which is connected to the sedimentation tank (11); The monitoring mechanism (5) is connected to the cover (3) and is used to monitor the experimental environmental parameters in the sedimentation tank (11).

2. The experimental apparatus for depositing extra-pile helium-xenon activation products according to claim 1, characterized in that, A heating element is connected to the wall of the deposition tank (11), and the heating element is arranged around the evaporation dish (2).

3. The experimental apparatus for depositing extra-pile helium-xenon activation products according to claim 1, characterized in that, The heating element is configured as a resistance wire; Multiple heating elements are arranged parallel to each other along the depth of the deposition tank (11), with each heating element arranged around the evaporation dish (2); or The heating element is arranged in a spiral coil on the wall of the deposition tank (11).

4. The experimental apparatus for depositing extra-pile helium-xenon activation products according to claim 1, characterized in that, The insulation body (7) is configured as a ceramic fiber body, a silicate body, or a glass fiber body.

5. The experimental apparatus for depositing extra-pile helium-xenon activation products according to claim 1, characterized in that, The hanging member (6) is constructed as an L-shaped rod, wherein the long section of the hanging member (6) is connected to the cover (3), and the angle between the long section and the short section of the hanging member (6) is an acute angle.

6. The experimental apparatus for depositing extra-pile helium-xenon activation products according to claim 5, characterized in that, The angle between the long and short sections of the hanging component (6) is 60°~85°.

7. The experimental apparatus for depositing extra-pile helium-xenon activation products according to claim 1, characterized in that, The sedimentation tank (11) is configured to withstand a maximum pressure of not less than 5 MPa.

8. The experimental apparatus for depositing extra-pile helium-xenon activation products according to claim 1, characterized in that, The cover (3) is configured as a flange.

9. The experimental apparatus for depositing extra-pile helium-xenon activation products according to claim 1, characterized in that, It also includes a back pressure valve (9), which is connected to the sedimentation tank (11), wherein the pipeline length between the back pressure valve (9) and the insulation body (7) is not less than 1m.

10. The experimental apparatus for depositing extra-pile helium-xenon activation products according to claim 1, characterized in that, It also includes a temperature control component (10), which is connected to the cover (3) to achieve temperature control within the deposition tank (11).

11. An experimental method for depositing extra-pile helium-xenon activation products, implemented based on the extra-pile helium-xenon activation product deposition experimental apparatus as described in any one of claims 1 to 10, characterized in that, Includes the following: Pretreatment was performed on the experimental piece (8); Nuclide is loaded into evaporation dish (2) and placed in deposition tank (11); Multiple experimental pieces (8) are hung one by one on the hanging piece (6); Connect the cover plate to keep the sedimentation tank (11) in a sealed environment; Set the maximum pressure relief value of the pressure relief valve (4); High-pressure inert gas is supplied into the sedimentation tank (11) through a gas supply mechanism; The space inside the sedimentation tank (11) is heated according to the predetermined heating time and heating temperature; After the deposition tank (11) has cooled down, the experimental piece (8) is taken out and the surface of the experimental piece (8) is subjected to microscopic analysis.

12. The experimental method for deposition of off-pile helium-xenon activation products according to claim 11, characterized in that, Before pretreatment of the experimental piece (8), the following shall be performed: Connect the cover plate to keep the sedimentation tank (11) in a sealed environment; A rotor flow meter, a first container, and a second container are connected in one step between the outlet of the gas supply mechanism and the sedimentation tank (11), wherein the first container is used to load a high-concentration acid solution and the second container is used to load a potassium permanganate solution. High-pressure, high-temperature inert gas is supplied through a gas supply mechanism until the volume of the high-pressure inert gas is not less than 20 times the volume of the sedimentation tank (11); After cooling down, the gas in the sedimentation tank (11) is discharged through the pressure relief valve (4) and the cover plate is removed.

13. The experimental method for deposition of helium-xenon activation products outside the reactor as described in claim 11, characterized in that, The pretreatment of experimental piece (8) includes the following: Provide multiple test pieces (8) and perform grinding and polishing treatment on the test pieces (8); Divide the multiple experimental pieces (8) into multiple groups, with each group containing no fewer than two experimental pieces (8); Each experimental piece (8) was immersed in nitric acid solution for different durations; The experimental piece (8) was ultrasonically cleaned using deionized water; Drying test specimen (8).

14. The experimental method for depositing off-pile helium-xenon activation products according to claim 13, characterized in that, The experimental pieces (8) were divided into four groups; the experimental pieces (8) in each group were immersed in nitric acid solution for 0 min, 5 min, 10 min and 45 min respectively.

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