Irradiation test device, irradiation test system, and gas release amount detection method

Abstract

The application provides an irradiation test device, an irradiation test system and a gas release amount detection method. The irradiation test device comprises an outer shell, sample capsule assemblies and connecting pieces. The sample capsule assemblies are internally formed with sample accommodation spaces for placing samples. The sample capsule assemblies are at least two and are located in the outer shell. The connecting pieces are the same in number as the sample capsule assemblies and are connected one by one. Each connecting piece is in communication with a corresponding sample accommodation space at one end and is in communication with an external pressure detection system at the other end through the outer shell. Through the arrangement of the plurality of sample capsule assemblies, the gas release amounts of the samples in the plurality of sample accommodation spaces can be measured respectively, the test process is simplified, and the test efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of nuclear equipment technology, and more specifically, to an irradiation testing apparatus, an irradiation testing system, and a method for detecting gas release. Background Technology

[0002] As the nuclear industry enters a period of rapid development, the demand for various new nuclear materials is constantly increasing. Before new materials are put into use, their physical and chemical properties need to be verified on a test reactor to ensure that they can meet the reactor's design and operational requirements.

[0003] Typically, irradiated materials are processed into samples that meet various performance tests, arranged and clamped according to a certain pattern, and then placed into the reactor along with the irradiation test apparatus. However, when testing multiple samples, the test process is cumbersome and inefficient. Summary of the Invention

[0004] To at least partially address the problems existing in the prior art, according to one aspect of the present invention, an irradiation testing apparatus is provided. The irradiation testing apparatus includes an outer shell, sample capsule assemblies, and connectors. The sample capsule assemblies have internal sample accommodating spaces for placing samples. There are at least two sample capsule assemblies, all located within the outer shell. The number of connectors is the same as the number of sample capsule assemblies and they are connected one-to-one. Each connector has one end connected to a corresponding sample accommodating space and the other end passing through the outer shell and connected to an external pressure detection system.

[0005] The irradiation testing apparatus provided in this application, through the arrangement of multiple sample capsule assemblies, can separately measure the gas release amount of samples within multiple sample accommodating spaces. When different samples are placed within the sample accommodating spaces, the gas release amount of different samples under the same irradiation conditions can be measured simultaneously, effectively simplifying the testing process and increasing efficiency. When the same sample is placed within the sample accommodating spaces, multiple gas release amounts of a single sample can be obtained in a single test to measure properties such as sample stability, simplifying the testing process and improving testing efficiency.

[0006] For example, the sample capsule assembly includes a capsule shell and a sample holder installed inside the capsule shell. The sample holder has a limiting groove. There are at least two sample holders arranged in opposite directions. The limiting grooves are joined together to form a sample accommodating space.

[0007] For example, the outer periphery of the sample holder has a gap with the capsule shell to form a first heat insulation cavity.

[0008] For example, at least one limiting groove has a sample thermocouple mounting groove on its bottom, a sample thermocouple is installed in the sample thermocouple mounting groove, the detection end of the sample thermocouple extends into the sample thermocouple mounting groove, and the connection end of the sample thermocouple extends out of the outer shell and is electrically connected to an external measurement and control system.

[0009] For example, a capsule holder is provided inside the outer shell, and the sample capsule assemblies are all installed inside the capsule holder. There is a gap between the capsule holder and the outer shell, and a second heat insulation cavity is formed.

[0010] For example, the capsule fixture is provided with a capsule mounting slot, the number of capsule mounting slots is not less than the number of sample capsule assemblies, each sample capsule assembly is installed in a corresponding capsule mounting slot, and there is a gap between the sample capsule assembly and the slot wall of the capsule mounting slot to form a third heat insulation cavity.

[0011] For example, the outer casing includes an irradiation tube and a first end cap and a second end cap located at opposite ends of the irradiation tube. The first end cap, the irradiation tube, and the second end cap together enclose an irradiation test chamber. The second heat insulation chamber and the third heat insulation chamber are both located inside the irradiation test chamber and are both connected to the irradiation test chamber. The irradiation test device also includes an air inlet pipe and an air outlet pipe. One end of the air inlet pipe is connected to the irradiation test chamber and the other end is connected to an external air source. One end of the air outlet pipe is connected to the irradiation test chamber and the other end is connected to the external air.

[0012] For example, there are at least two intake pipes, and the different intake pipes are connected to different types of external air sources.

[0013] For example, the irradiation testing apparatus also includes heating elements, the number of which is the same as the number of sample capsule assemblies, each heating element having a heating section extending into a capsule holder, and each heating section being located between two adjacent sample capsule assemblies.

[0014] For example, the irradiation test apparatus also includes capsule thermocouples, the number of which is the same as the number of sample capsule assemblies. The detection end of each capsule thermocouple extends into the capsule fixture and is located between two adjacent sample capsule assemblies. The connection end of the capsule thermocouple passes through the outer shell and is electrically connected to an external measurement and control system.

[0015] According to another aspect of the present invention, an irradiation testing system is also provided, comprising any of the above-described irradiation testing devices and pressure detection systems.

[0016] According to another aspect of the present invention, a method for detecting gas release is also provided, for detecting the amount of gas released from a sample in a sample capsule assembly in any of the above-mentioned irradiation test devices, the method comprising: detecting the pressure in a connector when the sample capsule assembly is in an irradiation state, and determining the amount of gas released from the sample in the corresponding sample capsule assembly by the pressure in the connector.

[0017] A series of simplified concepts are introduced in the description of the invention, which will be further explained in detail in the detailed description section. This description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to limit the scope of protection of the claimed technical solution.

[0018] The advantages and features of the present invention will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] The following figures are included as part of this invention for understanding its principles. The figures illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention. In the figures,

[0020] Figure 1 This is a cross-sectional view of an irradiation testing apparatus according to an exemplary embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of a portion of the structure of an irradiation testing apparatus according to an exemplary embodiment of the present invention;

[0022] Figure 3 This is a cross-sectional view at point AA in the figure;

[0023] Figure 4 A perspective view of a capsule retainer according to an exemplary embodiment of the present invention;

[0024] Figure 5 A cross-sectional view of a sample capsule assembly according to an exemplary embodiment of the present invention;

[0025] Figure 6 for Figure 5 Cross-sectional view at point BB;

[0026] Figure 7 A perspective view of a first limiting end cap according to an exemplary embodiment of the present invention;

[0027] Figure 8 A perspective view of a sample holder according to an exemplary embodiment of the present invention;

[0028] Figure 9 A perspective view of a protective casing according to an exemplary embodiment of the present invention;

[0029] Figure 10 This is a perspective view of a capsule top cover according to an exemplary embodiment of the present invention.

[0030] The above figures include the following reference numerals:

[0031] 10. Irradiation testing apparatus; 100. Outer shell; 101. Irradiation testing chamber; 102. Second insulation chamber; 103. Third insulation chamber; 110. Irradiation tube; 120. Support block; 130. Exhaust pipe; 140. Inlet pipe; 150. Heating element; 160. Capsule thermocouple; 171. First end cap; 172. Second end cap; 180. Elastic component; 190. Compensating component; 200. Sample capsule assembly; 201. Sample holding space; 202. First insulation chamber; 210. Capsule shell; 2110. Protective shell; 2120. Capsule top cover; 2130. Capsule bottom cover; 214. 0. Guide tube; 220. Sample fixing component; 2210. Sample thermocouple mounting slot; 2310. First limiting end cap; 2320. Second limiting end cap; 240. First limiting rib; 250. Third limiting rib; 300. Capsule fixing component; 310. Compensation component mounting slot; 320. Capsule mounting slot; 330. Second limiting rib; 400. Connector; 510. Support tube; 520. Mounting flange; 530. Air inlet connector; 540. Thermocouple seal; 550. First connecting tube; 560. Second connecting tube; 610. Neutron detector box; 620. Support rod; 90. Sample. Detailed Implementation

[0032] In the following description, numerous details are provided to enable a thorough understanding of the invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the invention, and that the invention can be practiced without one or more of these details. Furthermore, to avoid obscuring the invention, some technical features well-known in the art have not been described in detail.

[0033] To fully understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below; however, in addition to these detailed descriptions, the present invention may have other embodiments.

[0034] This invention provides an irradiation testing apparatus. This apparatus can perform verification tests on properties of samples, such as gas release rates, under irradiation conditions.

[0035] Combined with reference Figure 1 , Figure 2 and Figure 3An irradiation testing apparatus 10 may include a housing 100, a sample capsule assembly 200, and connectors 400. The sample capsule assembly 200 has a sample accommodating space 201 for placing a sample 90. There may be at least two sample capsule assemblies 200, each located within the housing 100. Each sample capsule assembly 200 and its sample accommodating space 201 are independent of each other. The number of connectors 400 is the same as the number of sample capsule assemblies 200, and they are connected one-to-one. Each connector 400 has one end connected to the corresponding sample accommodating space 201 and the other end passing through the housing 100 and connected to an external pressure detection system. The pressure detection system can be used to measure the pressure inside the sample capsule assembly 200. Exemplarily, the irradiation testing apparatus 10 may also include a support tube 510 connected to one side of the housing 100. The support tube 510 is connected to a mounting flange 520, which supports and connects the housing 100. The mounting flange 520 allows for the connection and fixation of the irradiation testing apparatus 10 to other structural components. The connector 400 can be a connecting pipe that passes through the housing 100 and the mounting flange 520 and is connected to an external pressure detection system.

[0036] During the experiment, the outer shell 100, along with the capsule holder 300 and sample capsule assembly 200 located within the outer shell 100, can be installed together inside the reactor to receive irradiation. Under irradiation conditions, the sample 90 releases a certain amount of gas, causing a corresponding change in pressure within the sample containment space 201. The pressure detection system can measure this pressure change in the sample containment space 201 via the connector 400, and the amount of gas released by the sample 90 under these conditions can be determined from the pressure change.

[0037] In the irradiation testing apparatus 10 provided in this application, there are at least two sample capsule assemblies 200. It is understood that the samples 90 within different sample capsule assemblies 200 can be the same or different. Specifically, taking the illustrated embodiment with three sample capsule assemblies 200 as an example, one of the three sample capsule assemblies 200 can be without sample 90 (i.e., a blank group), while the other two can be equipped with sample 90A (i.e., a parallel control group). This allows for the measurement of the gas release amount of multiple samples 90A, thus revealing the stability of the gas release amount of sample 90A. Alternatively, the three sample capsule assemblies 200 can be equipped with samples 90A, 90B, and 90C respectively, allowing for the measurement of the gas release amount of different samples under the same irradiation conditions. Furthermore, the sample 90 within the sample capsule assembly 200 can be arbitrarily configured according to different experimental purposes; this application does not impose further limitations on this. It is understood that although this application uses three sample capsule assemblies 200 in one sample fixture 220 as an example, the number of sample capsule assemblies 200 can be set in any other way according to the usage requirements, and this application does not impose too many restrictions on this.

[0038] The irradiation testing apparatus 10 provided in this application, through the arrangement of multiple sample capsule assemblies 200, can separately measure the gas release amount of samples 90 within multiple sample accommodating spaces 201. When different samples 90 are placed in the sample accommodating spaces 201, the gas release amount of different samples 90 under the same irradiation conditions can be measured simultaneously, effectively simplifying the testing process and increasing efficiency. When the same sample 90 is placed in the sample accommodating spaces 201, multiple gas release amounts of a single sample 90 can be obtained in a single test to measure the stability and other properties of the sample 90, simplifying the testing process and improving testing efficiency.

[0039] For example, sample 90 can be irradiated in an inert gas and undergo related experimental operations. Specifically, the end of connector 400 connected to the pressure detection system can also be connected to an external gas source to introduce inert gas into sample capsule assembly 200. Further, sample capsule assembly 200 can be filled with 1 atm of argon or 1 atm of helium and then sealed, allowing sample 90 to be irradiated in argon or helium and undergo related experimental operations. Different connectors 400 can be connected to the same type of external gas source or different types of external gas sources. It is understood that different types of gases have different thermal insulation coefficients. When the gas type inside different sample capsule assemblies 200 is different, the ambient temperature of sample 90 inside different sample capsule assemblies 200 will also be different. It can be understood that when the same type of sample 90 is installed in different sample capsule assemblies 200 and different sample capsule assemblies 200 are connected to different types of external gas sources, the amount of gas released by the same sample 90 under different environmental conditions can be achieved.

[0040] For example, in conjunction with reference Figure 2 and Figure 3The sample capsule assembly 200 includes a capsule shell 210 and sample holders 220 installed within the capsule shell 210. Each sample holder 220 has a limiting groove. At least two sample holders 220 are arranged opposite each other, and the limiting grooves, when joined together, form a sample receiving space 201. Exemplarily, the capsule shell 210 may include a protective shell 2110, a capsule top cover 2120, and a capsule bottom cover 2130. The capsule top cover 2120 and capsule bottom cover 2130 are respectively connected to opposite ends of the protective shell 2110. Further, both the capsule top cover 2120 and capsule bottom cover 2130 may be welded to the protective shell 2110. The protective shell 2110, capsule top cover 2120, and capsule bottom cover 2130 can be enclosed to form a sealed chamber. The sample accommodating space 201 is located within and communicates with this chamber. The connector 400 can extend into the sample accommodating space 201. Alternatively, the capsule top cover 2120 can be provided with a capsule air tube communicating with the sample accommodating space 201. The connector 400 communicates with the sample accommodating space 201 through the capsule air tube, thereby enabling communication between the sample accommodating space 201 and an external pressure detection system. Exemplarily, there can be two sample holders 220, each sample 90 being fixed into a semi-cylinder shape, and each semi-cylinder having a V-shaped limiting groove on its inner side. The assembled sample holders 220 are cylindrical with a long strip groove in the middle (i.e., the sample accommodating space 201). The sample 90 can be a cuboid adapted to the long strip groove. Alternatively, in some embodiments, the sample 90 can be a cylinder, and the sample accommodating space 201 within the sample holder 220 can be adapted to it to ensure the installation of the sample 90. This application does not impose further limitations on this. In embodiments not shown, the sample holder can be a single piece.

[0041] For example, in conjunction with reference Figure 2 , Figure 3 and Figure 7A first heat-insulating cavity 202 may be formed between the outer periphery of the sample holder 220 and the capsule shell 210. The first heat-insulating cavity 202 may be filled with an inert gas. The first heat-insulating cavity 202 may be annular and surround the outer periphery of the sample holder 220. The arrangement of the first heat-insulating cavity 202 can better prevent heat loss from the sample holder 220 and the sample 90. In the radial direction of the irradiation test apparatus 10, the temperature inside the first heat-insulating cavity 202 is higher, and the temperature outside the first heat-insulating cavity 202 is lower, forming a temperature gradient to achieve high-temperature irradiation of the sample 90 in a low-temperature environment. Exemplarily, the sample holder 220 may have two opposing ends, one end inserted into the first limiting end cap 2310 and the other end inserted into the second limiting end cap 2320. At least one of the first limiting end cap 2310 and the second limiting end cap 2320 may be provided with a third limiting rib 250, which abuts against the capsule shell 210. That is, the third limiting rib 250 limits the sample holder 220 and spacees the sample holder 220 from the capsule shell 210, and this space forms the first heat insulation cavity 202. Further, the third limiting rib 250 can extend along the axial direction of the sample holder 220. There can be multiple third limiting ribs 250, which can be arranged along the circumferential direction of the sample holder 220. Alternatively, in other embodiments, any other structure can be provided between the sample holder 220 and the capsule shell 210 to create a gap between them. The sample holder 220 can be made of molybdenum or stainless steel. The first limiting end cap 2310 and / or the second limiting end cap 2320 can be made of molybdenum. In embodiments not shown, the outer wall of the sample holder can be fitted to the capsule shell.

[0042] For example, in conjunction with reference Figure 4 , Figure 5 , Figure 8 and Figure 10At least one limiting groove has a sample thermocouple mounting groove 2210 on its bottom. A sample thermocouple can be installed in the sample thermocouple mounting groove 2210, with the detection end of the sample thermocouple extending into the sample thermocouple mounting groove 2210 and the connection end extending out of the outer shell 100 and electrically connected to an external measurement and control system. The arrangement of the sample thermocouples allows the temperature of the sample 90 to be obtained, i.e., the temperature of the sample 90 within each sample capsule assembly 200. For example, there can be two sample thermocouples, located on opposite sides of the sample 90. The sample thermocouples can more directly measure the ambient temperature of the sample 90. A guide tube 2140 can be provided on the capsule shell 210, through which the connection end of the capsule thermocouple 160 passes and is electrically connected to an external measurement and control system. A thermocouple seal 540 can be provided inside the guide tube 2140. In an embodiment with an outlet pipe 130, the sample thermocouple guided from the guide pipe 2140 can be guided to the outside via the outlet pipe 130 to be electrically connected to an external measurement and control system. Exemplarily, a thermocouple seal 540 can be connected to the mounting flange 520, through which the sample thermocouple is electrically connected to the measurement and control system. The sealing design pressure at the thermocouple seal 540 can be 0.4 MPa. In an embodiment with a heating element 150, the wire connected to the heating element 150 can be electrically connected to the measurement and control system via the outlet pipe 130, passing through the thermocouple seal 540.

[0043] For example, in conjunction with reference Figure 3 and Figure 4A capsule holder 300 may be disposed within the outer shell 100, and all sample capsule assemblies 200 are installed within the capsule holder 300. A second heat-insulating cavity 102 is formed between the capsule holder 300 and the outer shell 100, and is spaced apart from it. The second heat-insulating cavity 102 may be filled with an inert gas. The second heat-insulating cavity 102 may be annular and surround the outer periphery of the capsule holder 300. The arrangement of the second heat-insulating cavity 102 can better prevent heat loss from the capsule holder 300 and other structural components inside it. In the radial direction of the irradiation test apparatus 10, the temperature inside the second heat-insulating cavity 102 is higher, and the temperature outside the second heat-insulating cavity 102 is lower, forming a temperature gradient, which satisfies the requirement of achieving high-temperature irradiation of the sample 90 in a low-temperature environment. Specifically, the outer periphery of the capsule retainer 300 may be provided with a second limiting rib 330, which abuts against the inner wall of the outer shell 100 to limit the position of the capsule retainer 300 and create a gap between the capsule retainer 300 and the outer shell 100. Further, the second limiting rib 330 may extend along the axial direction of the capsule retainer 300. Multiple second limiting ribs 330 may be provided, and these multiple second limiting ribs 330 may be arranged along the circumferential direction of the capsule retainer 300. Alternatively, in other embodiments, any other structure may be provided between the capsule retainer and the outer shell to create a gap between them. In embodiments not shown, the outer wall of the capsule retainer may be fitted against the outer shell.

[0044] For example, in conjunction with reference Figure 3 , Figure 4 , Figure 6 and Figure 9The capsule fixture 300 may have capsule mounting slots 320. The number of capsule mounting slots 320 may be no less than the number of sample capsule assemblies 200. Each sample capsule assembly 200 is installed in one capsule mounting slot 320. There is a gap between the sample capsule assembly 200 and the wall of the capsule mounting slot 320, forming a third heat insulation cavity 103. The third heat insulation cavity 103 may be filled with inert gas. The third heat insulation cavity 103 may be annular and surround the outer periphery of the sample capsule assembly 200. The arrangement of the third heat insulation cavity 103 can better prevent heat loss from the sample capsule assembly 200. In the radial direction of the irradiation test device 10, the temperature inside the third heat insulation cavity 103 is higher, and the temperature outside the third heat insulation cavity 103 is lower, forming a temperature gradient, which satisfies the requirement of high-temperature irradiation of the sample 90 in a low-temperature environment. Specifically, the outer periphery of the sample capsule assembly 200 may be provided with a first limiting rib 240, which abuts against the inner wall of the outer shell 100 to limit the position of the sample capsule assembly 200 and create a gap between the sample capsule assembly 200 and the bottom of the capsule mounting groove 320. Further, the first limiting rib 240 may extend along the axial direction of the sample capsule assembly 200. Multiple first limiting ribs 240 may be provided, and these multiple first limiting ribs 240 may be arranged along the circumferential direction of the sample capsule assembly 200. Alternatively, in other embodiments, any other structure may be provided between the sample capsule assembly and the capsule mounting groove to create a gap between the sample capsule assembly and the bottom of the capsule mounting groove. In embodiments not shown, the outer wall of the sample capsule assembly may be fitted against the bottom of the capsule mounting groove.

[0045] Exemplarily, the number of capsule holders 300 can be set according to usage requirements; for example, as shown in the illustrated embodiment, there can be only one of each. A support block 120 can be provided at the end of the capsule holder 300 to support it and ensure the stability of its position. In embodiments not shown, there can be multiple capsule holders arranged along the length of the outer shell.

[0046] For example, in conjunction with reference Figure 1 , Figure 2 and Figure 3The outer casing 100 may include an irradiation tube 110 and a first end cap 171 and a second end cap 172 located at opposite ends of the irradiation tube 110. The first end cap 171, the irradiation tube 110, and the second end cap 172 can together enclose an irradiation test chamber 101. A second heat insulation chamber 102 and a third heat insulation chamber 103 can both be located within and communicate with the irradiation test chamber 101. The irradiation test device 10 may also include an inlet pipe 140 and an outlet pipe 130. One end of the inlet pipe 140 can communicate with the irradiation test chamber 101, and the other end can communicate with an external gas source. One end of the outlet pipe 130 can communicate with the irradiation test chamber 101, and the other end can communicate with external air. In this way, an external gas source can introduce gas (such as inert gas) into the irradiation test chamber 101, thereby filling the second heat insulation chamber 102 and the third heat insulation chamber 103 with the gas. Furthermore, the gas can be discharged to the outside through the exhaust pipe 130. This arrangement allows for better filling of the irradiation test chamber 101 and its second and third insulation chambers 102 and 103 with a specified type of gas. Different types of gases have different insulation capabilities; that is, this arrangement allows adjustment of the insulation capabilities of the second and third insulation chambers 102 and 103 by the type of external gas connected through the inlet pipe 140, thereby achieving control over the test temperature of the sample 90 and obtaining richer test data. Exemplarily, the irradiation test apparatus 10 may include an inlet connector 530 located at the end of the mounting flange 520 opposite to the sample capsule assembly 200, with the inlet pipe 140 passing through the mounting flange 520 and connected to the inlet connector 530.

[0047] For example, continue to refer to Figure 2 and Figure 3 There can be at least two inlet pipes 140, and the different inlet pipes 140 can be connected to different types of external gas sources. In an embodiment with two inlet pipes 140, one inlet pipe 140 can be connected to helium, and the other inlet pipe 140 can be connected to argon. This configuration allows for the modification of the insulation coefficients of the second insulation chamber 102 and the third insulation chamber 103 by filling the irradiation test chamber 101 with different proportions of mixed gas, thus controlling the insulation capabilities of the second insulation chamber 102 and the third insulation chamber 103. This enables more precise control of the test temperature of the sample 90, resulting in richer test data.

[0048] It is understood that in the embodiment having a second heat insulation cavity 102, a third heat insulation cavity 103, and a first heat insulation cavity 202, the first heat insulation cavity 202, the third heat insulation cavity 103, and the second heat insulation cavity 102 are arranged sequentially from the inside out. Four regions are formed in the radial direction of the irradiation test apparatus 10, creating a large temperature gradient to achieve high-temperature irradiation in a low-temperature environment. The thickness of the first heat insulation cavity 202 can be 0.2–0.5 mm, the thickness of the third heat insulation cavity 103 can be 0.12–0.2 mm, and the thickness of the second heat insulation cavity 102 can be 0.15–0.21 mm. It is understood that different thicknesses of each heat insulation cavity can affect the test temperature of the irradiation test apparatus 10; different thicknesses can achieve control within the range of 200°C to 900°C. Exemplarily, the first heat insulation cavity 202 can be filled with argon gas. The second heat insulation cavity 102 and the third heat insulation cavity 103 can be filled with a mixture of argon and helium gas.

[0049] For example, in conjunction with reference Figure 3 and Figure 4 The irradiation testing apparatus 10 may further include heating elements 150. The number of heating elements 150 may be the same as the number of sample capsule assemblies 200. The heating section of each heating element 150 may extend into the capsule fixing member 300, and each heating section may be located between two adjacent sample capsule assemblies 200. In this way, the heating element 150 can regulate the test temperature of the sample 90 by heating the capsule fixing member 300, thereby achieving thermal compensation. For example, the heating element 150 may be an electric heating rod. The heating element 150 may be set with different power according to the test requirements. Furthermore, the number of heating elements 150 may be one or more. Specifically, the capsule fixing member 300 may be provided with a heating element 150 mounting groove. One end of the heating element 150 extends into the heating element 150 mounting groove, and the other end passes through the outer shell 100 and is electrically connected to the external measurement and control system. The power of the heating element 150 may be 0.5 to 2 kW. It is understood that by adjusting the power of different heating elements 150, different samples 90 can be subjected to different ambient temperatures within the same irradiation test apparatus 10. Taking the embodiment shown in the figure as an example, there are three sample capsule assemblies 200 and three heating elements 150.

[0050] For example, in conjunction with reference Figure 3 and Figure 4The irradiation testing apparatus 10 may further include capsule thermocouples 160. The number of capsule thermocouples 160 can be the same as the number of sample capsule assemblies 200. The detection end of each capsule thermocouple 160 can extend into the capsule fixing member 300 and be located between two adjacent sample capsule assemblies 200. The connection end of the capsule thermocouple 160 can pass through the outer shell 100 and be electrically connected to an external measurement and control system. The capsule thermocouples 160 can be used to monitor the temperature of the capsule fixing member 300, obtaining the temperature of the capsule fixing member 300 in more real time. When the temperature measured by the capsule thermocouple 160 is high, the heating power of the electric heating element 150 can be reduced or the thermal insulation coefficient of the gas in the second insulation chamber 102 and the third insulation chamber 103 can be adjusted to cool the overall temperature and prevent the temperature of the capsule fixing member 300 from exceeding the melting point of the material. The setting of the capsule thermocouples 160 can more accurately obtain the temperature conditions of the sample capsule assembly 200, which is more conducive to temperature control in subsequent test operations. Taking the embodiment shown in the figure as an example, there are three sample capsule assemblies 200 and three capsule thermocouples 160. In the embodiment with an outlet pipe 130, the capsule thermocouples 160 can be guided to the outside through the outlet pipe 130 to be electrically connected to an external measurement and control system. Exemplarily, a thermocouple seal 540 can be connected to the mounting flange 520, and the capsule thermocouples 160 pass through the mounting flange 520 and the thermocouple seal 540 to be electrically connected to the measurement and control system.

[0051] Exemplarily, an elastic component 180 is also provided inside the outer casing 100, and the elastic component 180 is installed between the second end cap 172 and the sample capsule assembly 200. The elastic component 180 can ensure the stability of the position of the sample capsule assembly 200 within the outer casing 100. Further, the elastic component 180 may include a spring. Exemplarily, a support block 120 may also be provided on one side of the sample capsule assembly 200 to support the sample capsule assembly 200 and maintain the stability of the position of the sample capsule assembly 200 within the irradiation testing apparatus 10.

[0052] For example, the capsule fixing member 300 may also be provided with a neutron detection box 610 and a support rod 620 supporting the neutron detection box 610. There may be two neutron detection boxes 610, which are respectively located at both ends of the capsule fixing member 300. The support rod 620 is located between the two neutron detection boxes 610 and is fixed against the two neutron detection boxes 610.

[0053] Exemplarily, the capsule retainer 300 may also be provided with at least one mounting groove for a compensating member 190, which is used for detachably mounting the compensating member 190. Specifically, the outer shell 100 may be generally cylindrical, and the capsule retainer 300, located inside the outer shell 100, may be cylindrical. The mounting groove for the compensating member 190 may be a cuboid slot formed on the cylindrical structure, a cylindrical slot, or a slot of any other shape. The shapes or sizes of the multiple mounting grooves for the compensating members 190 may be the same or different. The shape of the compensating member 190 may be adapted to the shape of the mounting groove for the compensating member 190. The number of mounting grooves for the compensating member 190 may be set according to usage requirements, and may be two as shown in the illustrated embodiment, or more or fewer. There may be multiple compensating members 190, and at least two of the multiple compensating members 190 may have different densities. That is, at least two compensating members 190 with different densities are included. Exemplarily, the capsule retainer 300 may be made of aluminum alloy. The compensating element 190 can be made of molybdenum alloy, aluminum alloy, or any other type of metal. Exemplarily, one end of the outer casing 100 can be connected to a first connecting pipe 550, which is connected to the support pipe 510 via a second connecting pipe 560. Materials of different densities generate different amounts of heat under the same irradiation conditions. By installing compensating elements 190 of different densities into the compensating element 190 mounting slot, the amount of self-heating can be changed. The compensating element 190 mounting slot can be understood as follows: depending on the compensating element 190 installed inside, there are three possible scenarios: Scenario 1: The density of the compensating element 190 is less than the density of the capsule fixation element 300. This could be because the compensating element 190 uses a material with a lower density than the capsule fixation element 300, or because no compensating element 190 is installed in the mounting slot. Scenario 2: The density of the compensating element 190 is equal to the density of the capsule fixation element 300. Scenario 3: The density of the compensating element 190 is greater than the density of the capsule fixation element 300. The self-generated heat increases sequentially in cases one, two, and three. In other words, the test temperature of the sample capsule assembly 200, i.e., the test temperature of the sample 90, can be controlled by using different inserted compensation components 190. When the required test temperature for the sample 90 is low, the compensation component 190 is removed or a compensation component 190 made of a material with a density less than that of the capsule fixing component 300 is installed; when the required test temperature for the sample 90 is high, a compensation component 190 made of a material with a density greater than or equal to that of the capsule fixing component 300 is installed. By installing compensation components 190 of different densities in the installation slot of the compensation component 190, the ambient temperature of the sample 90 can be controlled. That is, different ambient temperature requirements can be met using the same irradiation test apparatus 10. The disassembly and assembly process of the compensation component 190 is simple, effectively simplifying the test process and reducing costs.

[0054] According to another aspect of the present invention, an irradiation testing system is also provided, comprising any of the above-described irradiation testing devices and a pressure detection system. Different connectors 400 can all be connected to the same pressure detection system. Since this irradiation testing device 10 adopts the technical solutions of any of the above embodiments, the irradiation testing system at least has the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here. Exemplarily, the irradiation testing system may also include a measurement and control system, an external gas source (e.g., argon, helium, etc.), etc.

[0055] For example, the operation steps can be as follows:

[0056] Step S100: Connect the inlet pipe 140, outlet pipe 130, capsule thermocouple 160, sample thermocouple, and heating element 150 to the measurement and control system, and connect the connector 400 to the pressure detection system.

[0057] Step S210: Start the vacuum pump of the pressure detection system;

[0058] Step S220: Draw the sample capsule assembly 200 to negative pressure, then introduce argon gas, repeat 2-3 times;

[0059] Step S300: Turn on the irradiation test system;

[0060] Step S400: The pressure inside each sample capsule assembly 200 is obtained in real time through the pressure detection system to obtain the gas release amount of sample 90 inside each sample capsule assembly 200.

[0061] According to another aspect of the present invention, a method for detecting gas release is also provided for detecting the amount of gas released from a sample 90 within a sample capsule assembly 200 in any of the above-described irradiation testing apparatus 10. The method includes: detecting the pressure in a connector 400 when the sample capsule assembly 200 is under irradiation, and determining the amount of gas released from the sample 90 within the corresponding sample capsule assembly 200 based on the pressure in the connector 400.

[0062] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front", "rear", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0063] For ease of description, relative terms such as "above," "over," "on the upper surface of," and "above" are used here to describe the regional positional relationship of one or more components or features shown in the figures to other components or features. It should be understood that relative terms include not only the orientation of the component as depicted in the figure but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.

[0064] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0065] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0066] The present invention has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, those skilled in the art will understand that the present invention is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of the present invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An irradiation testing apparatus, characterized in that, The device includes an outer shell, sample capsule assemblies, and connectors. The sample capsule assembly has a sample accommodating space inside for placing a sample. There are at least two sample capsule assemblies, all located within the outer shell. The number of connectors is the same as the number of sample capsule assemblies and they are connected one-to-one. Each connector has one end connected to the corresponding sample accommodating space and the other end passing through the outer shell and connected to an external pressure detection system. The sample capsule assembly includes a capsule shell and a sample fixing member installed within the capsule shell. The sample fixing member has a limiting groove. There are at least two sample fixing members, which are arranged opposite each other. The limiting grooves are joined together to form the sample accommodating space.

2. The irradiation testing apparatus according to claim 1, characterized in that, The outer periphery of the sample holder is spaced from the capsule shell to form a first heat insulation cavity.

3. The irradiation testing apparatus according to claim 1, characterized in that, At least one of the limiting grooves has a sample thermocouple mounting groove on its bottom. A sample thermocouple is installed in the sample thermocouple mounting groove. The detection end of the sample thermocouple extends into the sample thermocouple mounting groove, and the connection end of the sample thermocouple extends out of the outer shell and is electrically connected to an external measurement and control system.

4. The irradiation testing apparatus according to claim 1, characterized in that, The outer shell is provided with a capsule fixing component, and the sample capsule assembly is installed in the capsule fixing component. There is a gap between the capsule fixing component and the outer shell, forming a second heat insulation cavity.

5. The irradiation testing apparatus according to claim 4, characterized in that, The capsule fixing component is provided with a capsule mounting slot. The number of capsule mounting slots is not less than the number of sample capsule assemblies. Each sample capsule assembly is installed in one of the capsule mounting slots. There is a gap between the sample capsule assembly and the wall of the capsule mounting slot to form a third heat insulation cavity.

6. The irradiation testing apparatus according to claim 5, characterized in that, The outer casing includes an irradiation tube and a first end cap and a second end cap located at opposite ends of the irradiation tube. The first end cap, the irradiation tube, and the second end cap together enclose an irradiation test chamber. The second heat insulation chamber and the third heat insulation chamber are both located within the irradiation test chamber and are both in communication with the irradiation test chamber. The irradiation test apparatus further includes an air inlet pipe and an air outlet pipe. One end of the air inlet pipe is connected to the irradiation test chamber and the other end is connected to an external air source. One end of the air outlet pipe is connected to the irradiation test chamber and the other end is connected to the external air.

7. The irradiation testing apparatus according to claim 6, characterized in that, There are at least two air intake pipes, and the different air intake pipes are connected to different types of external air sources.

8. The irradiation testing apparatus according to claim 4, characterized in that, The irradiation testing apparatus further includes heating elements, the number of which is the same as the number of sample capsule assemblies. The heating section of each heating element extends into the capsule fixing member, and each heating section is located between two adjacent sample capsule assemblies.

9. The irradiation testing apparatus according to claim 4, characterized in that, The irradiation testing apparatus also includes capsule thermocouples, the number of which is the same as the number of sample capsule assemblies. The detection end of each capsule thermocouple extends into the capsule fixing component and is located between two adjacent sample capsule assemblies. The connection end of the capsule thermocouple passes through the outer shell and is electrically connected to the external measurement and control system.

10. An irradiation testing system, characterized in that, It includes the irradiation testing apparatus and pressure detection system as described in any one of claims 1 to 9.

11. A method for detecting gas release, used to detect the amount of gas released from the sample within the sample capsule assembly of the irradiation testing apparatus as described in any one of claims 1 to 9, characterized in that, The method includes: When the sample capsule assembly is under irradiation, the pressure in the connector is detected, and the amount of gas released from the sample in the corresponding sample capsule assembly is determined by the pressure in the connector.

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