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

Abstract

The invention provides an irradiation test device, an irradiation test system and a gas release amount detection method. The irradiation test device comprises an outer shell, at least two sample capsule assemblies and connecting pieces, sample containing spaces used for containing samples are formed in the sample capsule assemblies, the sample capsule assemblies are located in the outer shell, the number of the connecting pieces is the same as that of the sample capsule assemblies, and the connecting pieces and the sample capsule assemblies are connected in a one-to-one correspondence mode. One end of each connecting piece is communicated with the corresponding sample accommodating space, and the other end of each connecting piece penetrates through the outer shell and is communicated with an external pressure detection system. Through the arrangement of the plurality of sample capsule assemblies, the gas release amounts of the samples in the plurality of sample accommodating spaces can be respectively measured, the test process is simplified, and the test efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear equipment, and in particular to an irradiation test device, an irradiation test system and a gas release amount detection method. Background Art

[0002] As the nuclear industry enters a period of vigorous development, the demand for various new nuclear materials continues to increase. Before new materials are put into use, it is necessary to verify the physical and chemical properties of the materials on the test reactor to ensure that the new materials can meet the design and operation requirements of the reactor.

[0003] Usually, the irradiated materials are processed into samples that meet various performance tests, arranged and clamped according to a certain pattern, and then placed into the pile with the irradiation test device. However, when it comes to testing multiple samples, the test process is cumbersome and inefficient. Summary of the invention

[0004] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, an irradiation test device is provided. The irradiation test device comprises an outer shell, a sample capsule assembly and a connector, wherein a sample accommodating space for placing a sample is formed inside the sample capsule assembly, wherein there are at least two sample capsule assemblies and both are located in the outer shell, the number of connectors is the same as the number of sample capsule assemblies and they are connected one by one, and each connector has one end connected to the corresponding sample accommodating space and the other end passes through the outer shell and is connected to an external pressure detection system.

[0005] The irradiation test device provided by the present application can measure the gas release of samples in multiple sample accommodating spaces respectively by setting up multiple sample capsule assemblies. When different samples are placed in the sample accommodating space, the gas release of different samples under the same irradiation conditions can be measured at the same time, which effectively simplifies the test process and is more efficient. When the same sample is placed in the sample accommodating space, multiple gas releases of a sample can be obtained in one test to measure the performance of the sample stability, simplify the test process, and improve the test efficiency.

[0006] Exemplarily, the sample capsule assembly includes a capsule shell and a sample fixing part installed in the capsule shell, a limiting groove is provided on the sample fixing part, there are at least two sample fixing parts which are arranged in abutment with each other, and the limiting grooves are assembled to form a sample accommodating space.

[0007] Exemplarily, there is a gap between the outer periphery of the sample fixing member and the capsule shell, and a first heat-insulating cavity is formed.

[0008] Exemplarily, a sample thermocouple mounting groove is opened on the bottom of at least one limit groove, 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 connecting end of the sample thermocouple extends outside the outer shell and is electrically connected to an external measurement and control system.

[0009] Exemplarily, a capsule fixing part is disposed in the outer shell, and the sample capsule components are all installed in the capsule fixing part. There is a gap between the capsule fixing part and the outer shell to form a second heat-insulating cavity.

[0010] Exemplarily, capsule mounting grooves are provided in the capsule fixing member, the number of which is not less than the number of sample capsule assemblies, each sample capsule assembly is correspondingly installed in a capsule mounting groove, and there is a gap between the sample capsule assembly and the groove wall of the capsule mounting groove to form a third insulation cavity.

[0011] Exemplarily, the outer shell includes an irradiation tube and a first end cap and a second end cap respectively 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 insulation chamber and the third insulation chamber are both located in 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] Exemplarily, there are at least two air intake pipes, and different air intake pipes are connected to different types of external air sources.

[0013] Exemplarily, the irradiation test device further includes heating elements, the number of which is the same as the number of sample capsule assemblies, a heating section of each heating element extends into the capsule fixing element, and each heating section is located between two adjacent sample capsule assemblies.

[0014] Exemplarily, the irradiation test device 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 member and is located between two adjacent sample capsule assemblies, and the connecting end of the capsule thermocouple passes through the outer shell and is electrically connected to the external measurement and control system.

[0015] According to another aspect of the present invention, there is also provided an irradiation test system, comprising any one of the above-mentioned irradiation test devices and a pressure detection system.

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

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

[0018] The advantages and features of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

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

[0021] Figure 2 A cross-sectional view of a partial structure of an irradiation test device according to an exemplary embodiment of the present invention;

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

[0023] Figure 4 is a perspective view of a capsule fixing member according to an exemplary embodiment of the present invention;

[0024] Figure 5 is 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-section at the middle BB;

[0026] Figure 7 A three-dimensional diagram of a first position-limiting end cover according to an exemplary embodiment of the present invention;

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

[0028] Fig. 9 A perspective view of a protective case according to an exemplary embodiment of the present invention;

[0029] Fig.10 FIG. 4 is a perspective view of a capsule cover according to an exemplary embodiment of the present invention.

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

[0031] 10. Irradiation test device; 100. Outer shell; 101. Irradiation test chamber; 102. Second insulation chamber; 103. Third insulation chamber; 110. Irradiation tube; 120. Support block; 130. Air outlet pipe; 140. Air inlet pipe; 150. Heating element; 160. Capsule thermocouple; 171. First end cover; 172. Second end cover; 180. Elastic component; 190. Compensation element; 200. Sample capsule assembly; 201. Sample accommodating 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 part; 2210. Sample thermocouple mounting groove; 2310. First limiting end cover; 2320. Second limiting end cover; 240. First limiting rib; 250. Third limiting rib; 300. Capsule fixing part; 310. Compensation part mounting groove; 320. Capsule mounting groove; 330. Second limiting rib; 400. Connecting part; 510. Support tube; 520. Mounting flange; 530. Air inlet connector; 540. Thermocouple seal; 550. First connecting tube; 560. Second connecting tube; 610. Neutron detection box; 620. Support rod; 90. Sample. DETAILED DESCRIPTION

[0032] In the following description, a large amount of details are provided so that the present invention can be thoroughly understood. However, it will be appreciated by those skilled in the art that the following description only exemplarily illustrates a preferred embodiment of the present invention, and the present invention can be implemented without one or more such details. In addition, in order to avoid confusion with the present invention, some technical features well known in the art are not described in detail.

[0033] In order 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. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0034] An embodiment of the present invention provides an irradiation test device, which can perform verification tests on the performance of a sample such as the amount of gas released under irradiation conditions.

[0035] Combined with reference Figure 1 , Figure 2 and Figure 3, an irradiation test device 10 may include an outer shell 100, a sample capsule assembly 200 and a connector 400. A sample containing space 201 for placing a sample 90 is formed inside the sample capsule assembly 200. There may be at least two sample capsule assemblies 200 and both are located in the outer shell 100. Each sample capsule assembly 200 is independent of each other, and the sample containing spaces 201 are also 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 by one. Each connector 400 is connected to the corresponding sample containing space 201 at one end and the other end passes through the outer shell 100 and is connected to an external pressure detection system. The pressure detection system can be used to measure the pressure in the sample capsule assembly 200. Exemplarily, the irradiation test device 10 may also include a support tube 510 connected to one side of the outer shell 100, the support tube 510 is connected to the mounting flange 520, the support tube 510 is used to support and connect the outer shell 100, and the connection and fixation of the irradiation test device 10 with other structural parts can be achieved through the mounting flange 520. The connecting member 400 may be a connecting pipe, which passes through the outer shell 100 and the mounting flange 520 and is connected to an external pressure detection system.

[0036] During the test, the outer shell 100 and the capsule fixing member 300 and the sample capsule assembly 200 located in the outer shell 100 can be installed together in the reactor to be irradiated. Under the irradiation condition, the sample 90 releases a certain amount of gas, so that the pressure in the sample accommodating space 201 changes accordingly. The pressure detection system can measure the pressure change of the sample accommodating space 201 through the connecting member 400, and the amount of gas released by the sample 90 under this condition can be known through the pressure change.

[0037] In the irradiation test device 10 provided in the present application, there are at least two sample capsule assemblies 200. It can be understood that the samples 90 in different sample capsule assemblies 200 can be the same or different. Specifically, taking the example of the number of sample capsule assemblies 200 in the illustrated embodiment as three, one of the three sample capsule assemblies 200 can be installed with no sample 90 (i.e., as a blank group), and the other two can be installed with sample 90A (i.e., a parallel control group), that is, the gas release amount of multiple samples 90A can be measured, and the stability of the gas release amount of sample 90A can be known. Alternatively, the three sample capsule assemblies 200 can be installed with sample 90A, sample 90B and sample 90C respectively, and the gas release amount of different samples under the same irradiation conditions can be measured. Alternatively, the samples 90 in the sample capsule assembly 200 can be arbitrarily set according to different test purposes, and the present application does not make too many restrictions on this. It is understandable that, although the present application takes the example of three sample capsule assemblies 200 being arranged in one sample fixing member 220 , the number of the sample capsule assemblies 200 can be arranged in any other manner according to the use requirements, and the present application does not impose too many restrictions on this.

[0038] The irradiation test device 10 provided in the present application can respectively measure the gas release amount of the samples 90 in the multiple sample accommodating spaces 201 by setting up multiple sample capsule assemblies 200. When different samples 90 are placed in the sample accommodating space 201, the gas release amount of the different samples 90 under the same irradiation conditions can be measured at the same time, which effectively simplifies the test process and is more efficient. When the same sample 90 is placed in the sample accommodating space 201, multiple gas release amounts of a sample 90 can be obtained in one test to measure the stability and other properties of the sample 90, simplifying the test process and improving the test efficiency.

[0039] Exemplarily, the sample 90 can be irradiated in an inert gas and perform relevant test operations. Specifically, one end of the connector 400 connected to the pressure detection system can also be connected to an external gas source to introduce an inert gas into the sample capsule assembly 200. Further, the sample capsule assembly 200 can be filled with 1atm of argon or 1atm of helium and then sealed, and the sample 90 can be irradiated in argon or helium and perform relevant test operations. Different connectors 400 can be connected to the same type of external gas source, or different types of external gas sources. It can be understood that different types of gases have different insulation coefficients. When the gas types inside different sample capsule assemblies 200 are different, the ambient temperatures of the samples 90 in different sample capsule assemblies 200 are also different. It can be understood that when the same 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 a sample fixing member 220 installed in the capsule shell 210. A limiting groove is provided on the sample fixing member 220. There are at least two sample fixing members 220 and they are arranged in a matched manner. The limiting grooves can be assembled to form a sample accommodating 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 the capsule bottom cover 2130 are respectively connected to opposite ends of the protective shell 2110. Further, the capsule top cover 2120 and the capsule bottom cover 2130 can be welded to the protective shell 2110. The protective shell 2110, the capsule top cover 2120 and the capsule bottom cover 2130 can enclose and form a sealed chamber, the sample accommodating space 201 is located in the chamber and communicated with it, the connector 400 can extend into the sample accommodating space 201, or the capsule top cover 2120 can be provided with a capsule air tube connected to the sample accommodating space 201, and the connector 400 is connected to the sample accommodating space 201 through the capsule air tube to achieve the connection between the sample accommodating space 201 and the external pressure detection system. Exemplarily, the sample fixing member 220 can be two, each sample 90 is fixed into a semi-cylinder, and a V-shaped limiting groove is provided on the inner side of each semi-cylinder. The matched sample fixing member 220 is cylindrical and has 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 may be a cylinder, and the sample containing space 201 in the sample fixing member 220 may be adapted thereto to ensure the installation of the sample 90, and this application does not make too many restrictions on this. In an embodiment not shown, the sample fixing member may be an integral member.

[0041] For example, in conjunction with reference Figure 2 , Figure 3 and Figure 7, there may be a gap between the periphery of the sample fixture 220 and the capsule shell 210 and form a first insulation cavity 202. The first insulation cavity 202 may be filled with an inert gas. The first insulation cavity 202 may be annular and surround the periphery of the sample fixture 220. The setting of the first insulation cavity 202 can better avoid the heat dissipation of the sample fixture 220 and the sample 90. In the radial direction of the irradiation test device 10, the temperature inside the first insulation cavity 202 is higher, and the temperature outside the first insulation cavity 202 is lower, forming a temperature gradient, which satisfies the high temperature irradiation of the sample 90 in a low temperature environment. Exemplarily, the sample fixture 220 may have two opposite ends, one end of which is inserted into the first limiting end cover 2310 and the other end is inserted into the second limiting end cover 2320. A third limiting rib 250 may be provided on at least one of the first limiting end cover 2310 and the second limiting end cover 2320, and the third limiting rib 250 is against the capsule shell 210. That is, the third limiting rib 250 limits the sample fixture 220 and separates the sample fixture 220 from the capsule shell 210, and the interval forms the first heat insulation cavity 202. Further, the third limiting rib 250 can extend along the axial direction of the sample fixture 220. There can be multiple third limiting ribs 250, and multiple third limiting ribs 250 can be arranged along the circumferential direction of the sample fixture 220. Alternatively, in other embodiments, any other structure can be set between the sample fixture 220 and the capsule shell 210 to provide a gap between the sample fixture 220 and the capsule shell 210. The sample fixture 220 can be made of molybdenum metal or stainless steel metal. The first limiting end cover 2310 and / or the second limiting end cover 2320 can be made of molybdenum metal. In an embodiment not shown, the outer wall of the sample fixture can be arranged to fit the capsule shell.

[0042] For example, in conjunction with reference Figure 4 , Figure 5 , Figure 8 and Fig.10, a sample thermocouple mounting groove 2210 may be provided on the bottom of at least one limiting groove, a sample thermocouple may be installed in the sample thermocouple mounting groove 2210, a detection end of the sample thermocouple extends into the sample thermocouple mounting groove 2210, and a connection end of the sample thermocouple extends outside the outer shell 100 and is electrically connected to an external measurement and control system. The provision of the sample thermocouple can obtain the temperature of the sample 90, that is, the temperature of the sample 90 in each sample capsule assembly 200. Exemplarily, there may be two sample thermocouples and they are respectively located on opposite sides of the sample 90. The sample thermocouple can more directly measure the ambient temperature of the sample 90. A guide tube 2140 may be provided on the capsule shell 210, and the connection end of the capsule thermocouple 160 passes through the guide tube 2140 and is electrically connected to an external measurement and control system, and a thermocouple seal 540 may be provided inside the guide tube 2140. In an embodiment in which an air outlet pipe 130 is provided, the sample thermocouple guided out of the guide pipe 2140 can be guided to the outside through the air 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 sample thermocouple is electrically connected to the measurement and control system through the thermocouple seal 540. The sealing design pressure at the thermocouple seal 540 can be 0.4 MPa. In an embodiment in which a heating element 150 is provided, the wire connected to the heating element 150 can pass through the air outlet pipe 130, pass through the thermocouple seal 540 and be electrically connected to the measurement and control system.

[0043] For example, in conjunction with reference Figure 3 and Figure 4, a capsule fixing part 300 may be provided in the outer shell 100, and the sample capsule assembly 200 is installed in the capsule fixing part 300. There is a gap between the capsule fixing part 300 and the outer shell 100 and a second insulation cavity 102 is formed. The inside of the second insulation cavity 102 may be filled with an inert gas. The second insulation cavity 102 may be annular and surround the outer periphery of the capsule fixing part 300. The provision of the second insulation cavity 102 can better prevent the heat dissipation of the capsule fixing part 300 and other structural parts inside the capsule fixing part 300. In the radial direction of the irradiation test device 10, the temperature on the inner side of the second insulation cavity 102 is higher, and the temperature on the outer side of the second insulation cavity 102 is lower, forming a temperature gradient, which satisfies the high-temperature irradiation of the sample 90 in a low-temperature environment. Specifically, the outer periphery of the capsule fixing member 300 may be provided with a second limiting rib 330, and the second limiting rib 330 abuts against the inner wall of the outer shell 100 to limit the position of the capsule fixing member 300 and to provide a gap between the capsule fixing member 300 and the outer shell 100. Further, the second limiting rib 330 may extend along the axial direction of the capsule fixing member 300. There may be a plurality of second limiting ribs 330, and the plurality of second limiting ribs 330 may be arranged along the circumferential direction of the capsule fixing member 300. Alternatively, in other embodiments, any other structure may be provided between the capsule fixing member and the outer shell to provide a gap between the capsule fixing member and the outer shell. In an embodiment not shown, the outer wall of the capsule fixing member may be provided in contact with the outer shell.

[0044] For example, in conjunction with reference Figure 3 , Figure 4 , Figure 6 and Fig. 9, a capsule mounting groove 320 may be provided in the capsule fixing member 300, the number of the capsule mounting grooves 320 may not be less than the number of the sample capsule assembly 200, each sample capsule assembly 200 is correspondingly installed in a capsule mounting groove 320, and there is a gap between the sample capsule assembly 200 and the groove wall of the capsule mounting groove 320 to form a third insulation cavity 103. The inside of the third insulation cavity 103 may be filled with an inert gas. The third insulation cavity 103 may be annular and surround the outer periphery of the sample capsule assembly 200. The provision of the third insulation cavity 103 may better prevent the heat dissipation of the sample capsule assembly 200. In the radial direction of the irradiation test device 10, the temperature on the inner side of the third insulation cavity 103 is higher, and the temperature on the outer side of the third insulation cavity 103 is lower, forming a temperature gradient, which satisfies the high-temperature irradiation of the sample 90 in a low-temperature environment. Specifically, the periphery of the sample capsule assembly 200 may be provided with a first limiting rib 240, and the first limiting rib 240 abuts against the inner wall of the outer shell 100 to limit the position of the sample capsule assembly 200 and to provide 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. There may be a plurality of first limiting ribs 240, and the plurality of 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 provide a gap between the sample capsule assembly and the bottom of the capsule mounting groove. In an embodiment not shown, the outer wall of the sample capsule assembly may be provided in contact with the bottom of the capsule mounting groove.

[0045] For example, the number of capsule fixing members 300 can be set according to the use requirements, for example, each can be one as in the illustrated embodiment. A support block 120 can be provided at the end of the capsule fixing member 300 to support the capsule fixing member 300 and ensure the stability of the position of the capsule fixing member 300. In an embodiment not shown, there can be multiple capsule fixing members, which are arranged along the length direction of the outer shell.

[0046] For example, in conjunction with reference Figure 1 , Figure 2 and Figure 3The outer shell 100 may include an irradiation tube 110 and a first end cap 171 and a second end cap 172 respectively located at opposite ends of the irradiation tube 110. The first end cap 171, the irradiation tube 110 and the second end cap 172 may be enclosed together to form an irradiation test chamber 101. The second insulation chamber 102 and the third insulation chamber 103 may be both located in the irradiation test chamber 101 and both communicate with the irradiation test chamber 101. The irradiation test device 10 may also include an air inlet pipe 140 and an air outlet pipe 130. One end of the air inlet pipe 140 may be communicated with the irradiation test chamber 101 and the other end may be communicated with an external air source. One end of the air outlet pipe 130 may be communicated with the irradiation test chamber 101 and the other end may be communicated with external air. In this way, the external air source may introduce gas (such as inert gas) into the irradiation test chamber 101, thereby filling the second insulation chamber 102 and the third insulation chamber 103 with the gas. Moreover, the gas can be discharged to the outside through the outlet pipe 130. With this arrangement, the irradiation test chamber 101 and the second insulation chamber 102 and the third insulation chamber 103 therein can be better filled with the specified type of gas. Different types of gases have different insulation capabilities, that is, with this arrangement, the insulation capabilities of the second insulation chamber 102 and the third insulation chamber 103 can be adjusted by the type of external gas connected to the inlet pipe 140, that is, the test temperature of the sample 90 can be regulated to obtain richer test data. Exemplarily, the irradiation test device 10 may include an inlet connector 530 located at one end of the mounting flange 520 facing away from the sample capsule assembly 200, and the inlet pipe 140 passes through the mounting flange 520 and is connected to the inlet connector 530.

[0047] For example, continue to combine with reference Figure 2 and Figure 3 , there can be at least two air inlet pipes 140, and different air inlet pipes 140 can be connected to different types of external gas sources. In the embodiment where there are two air inlet pipes 140, one air inlet pipe 140 can be connected to helium, and the other air inlet pipe 140 can be connected to argon. In this way, by filling the irradiation test chamber 101 with mixed gases of different proportions, the insulation coefficients of the second insulation chamber 102 and the third insulation chamber 103 are changed, that is, the insulation capacity of the second insulation chamber 102 and the third insulation chamber 103 is regulated. In this way, the test temperature of the sample 90 can be more accurately regulated to obtain more abundant test data.

[0048] It is understood that in the embodiment with the second insulation cavity 102, the third insulation cavity 103 and the first insulation cavity 202, the first insulation cavity 202, the third insulation cavity 103 and the second insulation cavity 102 are surrounded and arranged in sequence from the inside to the outside. Four regions are formed in the radial direction of the irradiation test device 10 to form a large temperature gradient, which satisfies the high temperature irradiation in a low temperature environment. The thickness of the first insulation cavity 202 can be 0.2-0.5 mm, the thickness of the third insulation cavity 103 can be 0.12-0.2 mm, and the thickness of the second insulation cavity 102 can be 0.15-0.21 mm. It is understood that the different thickness settings of each insulation cavity can affect the test temperature of the irradiation test device 10, and different thickness settings can achieve regulation within the range of 200°C to 900°C. Exemplarily, argon can be filled in the first insulation cavity 202. A mixed gas of argon and helium can be filled in the second insulation cavity 102 and the third insulation cavity 103.

[0049] For example, in conjunction with reference Figure 3 and Figure 4 , the irradiation test device 10 may also include a heating element 150, the number of which 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 achieve the regulation of the test temperature of the sample 90 by heating and heating the capsule fixing member 300, thereby achieving thermal compensation. Exemplarily, the heating element 150 may be an electric heating rod. The heating element 150 may be set to different powers according to the test requirements, and further, the number of the heating elements 150 may be one or more. Specifically, a heating element 150 mounting groove may be provided on the capsule fixing member 300, 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 to be electrically connected to the external measurement and control system. The power of the heating element 150 may be 0.5 to 2KW. It is understandable that different samples 90 can be placed in different ambient temperatures in the same irradiation test device 10 by adjusting the power of different heating elements 150. 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 test device 10 may also include capsule thermocouples 160. The number of capsule thermocouples 160 may be the same as the number of sample capsule assemblies 200. The detection end of each capsule thermocouple 160 may 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 may pass through the outer shell 100 to be electrically connected to the external measurement and control system. The capsule thermocouple 160 may be used to monitor the temperature of the capsule fixing member 300 and obtain the temperature of the capsule fixing member 300 in a more real-time manner. When the temperature measured by the capsule thermocouple 160 is high, the heating power of the electric heating member 150 is controlled to be reduced or the thermal insulation coefficient of the gas in the second insulation chamber 102 and the third insulation chamber 103 is adjusted to cool the entire device and prevent the temperature of the capsule fixing member 300 from exceeding the melting point of the material. The setting of the capsule thermocouple 160 may more accurately obtain the temperature conditions of the sample capsule assembly 200, which is more conducive to temperature regulation 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 provided with an air outlet pipe 130, the capsule thermocouple 160 can be guided to the outside through the air 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 thermocouple 160 is electrically connected to the measurement and control system through the mounting flange 520 and the thermocouple seal 540.

[0051] Exemplarily, an elastic component 180 is further provided in the outer shell 100, and the elastic component 180 is installed between the second end cover 172 and the sample capsule component 200. The elastic component 180 can ensure the stability of the position of the sample capsule component 200 in the outer shell 100. Further, the elastic component 180 can include a spring. Exemplarily, a support block 120 can also be provided on one side of the sample capsule component 200 to support the sample capsule component 200 and maintain the stability of the position of the sample capsule component 200 in the irradiation test device 10.

[0052] Exemplarily, a neutron detection box 610 and a support rod 620 for supporting the neutron detection box 610 may be disposed in the capsule fixture 300. There may be two neutron detection boxes 610, which are respectively located at two ends of the capsule fixture 300, and the support rod 620 is located between the two neutron detection boxes 610 and fixed against the two neutron detection boxes 610.

[0053] Exemplarily, at least one compensating member 190 mounting groove may be provided on the capsule fixing member 300, and the compensating member 190 mounting groove is used to detachably mount the compensating member 190. Specifically, the outer shell 100 as a whole may be roughly cylindrical, and the capsule fixing member 300 is located inside the outer shell 100 and may be cylindrical. The compensating member 190 mounting groove may be a rectangular parallelepiped slot opened on the cylindrical structure, or may be a cylindrical slot, or a slot of any other shape. The shapes or sizes of the multiple compensating member 190 mounting grooves may be the same or different. The shape of the compensating member 190 may be adapted to the shape of the compensating member 190 mounting groove. The number of compensating member 190 mounting grooves may be set according to the use requirements, and may be set to two as in the illustrated embodiment, or may be set to more or less. There may be multiple compensating members 190, and the density of at least two of the multiple compensating members 190 may be different. That is, at least two compensating members 190 of different densities are included. Exemplarily, the capsule fixing member 300 may be made of aluminum alloy. The compensating member 190 may be made of molybdenum alloy, aluminum alloy or any other type of metal. Exemplarily, a first connecting tube 550 may be connected to one end of the outer shell 100, and the first connecting tube 550 is connected to the support tube 510 through a second connecting tube 560. Materials with different densities generate different amounts of heat from self-heating under the same irradiation conditions. By installing compensating members 190 of different densities into the compensating member 190 mounting groove, the amount of self-heating may be changed. It can be understood that the compensating member 190 mounting groove is divided into the following three situations according to the different compensating members 190 installed inside it. Situation 1: The density of the compensating member 190 is less than the density of the capsule fixing member 300. This may be because the compensating member 190 uses a material with a smaller density than the capsule fixing member 300, or because no compensating member 190 is installed in the compensating member 190 mounting groove. Situation 2: The density of the compensating member 190 is equal to the density of the capsule fixing member 300. Situation 3: The density of the compensating member 190 is greater than the density of the capsule fixing member 300. The self-heat increases in the three cases of case 1, case 2 and case 3. That is to say, the test temperature of the sample capsule assembly 200, that is, the test temperature of the sample 90, can be regulated by inserting different compensating parts 190. When the test temperature required by the sample 90 is relatively low, the compensating part 190 is removed or the compensating part 190 made of a material with a density less than the density of the capsule fixing part 300 is installed; when the test temperature required by the sample 90 is relatively high, the compensating part 190 made of a material with a density greater than or equal to the density of the capsule fixing part 300 is installed. By installing compensating parts 190 of different densities in the installation groove of the compensating part 190, the ambient temperature of the sample 90 can be regulated. That is, the same irradiation test device 10 can be used to meet the requirements of different ambient temperatures, and the disassembly and assembly process of the compensating part 190 is simple, which can effectively simplify the test process and reduce the cost.

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

[0055] Exemplarily, the operation steps may be as follows:

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

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

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

[0059] Step S300: starting the irradiation test system;

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

[0061] According to another aspect of the present invention, a method for detecting the amount of gas released by the sample 90 in the sample capsule assembly 200 in any one of the above-mentioned irradiation test devices 10 is also provided. The method comprises: when the sample capsule assembly 200 is in an irradiation state, detecting the pressure in the connecting member 400, and determining the amount of gas released by the sample 90 in the corresponding sample capsule assembly 200 according to the pressure in the connecting member 400.

[0062] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by directional words such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "vertical", "horizontal", "top", "bottom", etc. is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words 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 cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the contour of each component itself.

[0063] For ease of description, regional relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the regional positional relationship between one or more components or features shown in the figure and other components or features. It should be understood that regional relative terms include not only the orientation of the components as described in the figure, but also different orientations in use or operation. For example, if the components in the accompanying drawings are inverted as a whole, the components "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Therefore, the exemplary term "above" may include both "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this article is intended to include all of these situations.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, parts, components and / or combinations thereof.

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

[0066] The present invention has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the present invention is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention. The protection scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An irradiation test device, characterized in that: It comprises an outer shell, a sample capsule assembly and a connecting piece, wherein a sample containing space for placing a sample is formed inside the sample capsule assembly, wherein the sample capsule assemblies are at least two and both are located inside the outer shell, the number of the connecting pieces is the same as the number of the sample capsule assemblies and they are connected one-to-one, and each of the connecting pieces has one end connected to the corresponding sample containing space and the other end passes through the outer shell and is connected to an external pressure detection system.

2. The irradiation test device according to claim 1, characterized in that: The sample capsule assembly comprises a capsule shell and a sample fixing part installed in the capsule shell. The sample fixing part is provided with a limiting groove. There are at least two sample fixing parts which are arranged in abutment with each other. The limiting grooves are assembled to form the sample accommodating space.

3. The irradiation test device according to claim 2, characterized in that: A gap is formed between the outer periphery of the sample fixing component and the capsule shell, and a first heat-insulating cavity is formed.

4. The irradiation test device according to claim 2, characterized in that: A sample thermocouple installation groove is provided on the bottom of at least one of the limit grooves, a sample thermocouple is installed in the sample thermocouple installation groove, a detection end of the sample thermocouple extends into the sample thermocouple installation groove, and a connection end of the sample thermocouple extends outside the outer shell and is electrically connected to an external measurement and control system.

5. The irradiation test device according to claim 1, characterized in that: A capsule fixing part is arranged in the outer shell, and the sample capsule components are all installed in the capsule fixing part. There is a gap between the capsule fixing part and the outer shell to form a second heat-insulating cavity.

6. The irradiation test device according to claim 5, characterized in that: The capsule fixing member is provided with capsule mounting grooves, the number of which is not less than the number of the sample capsule assemblies, each of the sample capsule assemblies is correspondingly installed in one of the capsule mounting grooves, and there is a gap between the sample capsule assemblies and the groove wall of the capsule mounting groove to form a third insulation cavity.

7. The irradiation test device according to claim 6, characterized in that: The outer shell includes an irradiation tube and a first end cap and a second end cap respectively 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 insulation chamber and the third insulation chamber are both located in the irradiation test chamber and are communicated with 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, and one end of the air outlet pipe is connected to the irradiation test chamber and the other end is connected to external air.

8. The irradiation test device according to claim 7, characterized in that: There are at least two air inlet pipes, and different air inlet pipes are connected to different types of external air sources.

9. The irradiation test device according to claim 5, characterized in that: The irradiation test device also includes heating elements, the number of which is the same as the number of the sample capsule assemblies, the heating section of each heating element extends into the capsule fixing element, and each heating section is located between two adjacent sample capsule assemblies.

10. The irradiation test device according to claim 5, characterized in that: The irradiation test device 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 member and is located between two adjacent sample capsule assemblies, and the connection end of the capsule thermocouple passes through the outer shell and is electrically connected to an external measurement and control system.

11. An irradiation test system, characterized in that: The invention comprises the radiation testing device and the pressure detection system as claimed in any one of claims 1 to 10.

12. A method for detecting the amount of gas released by a sample in a sample capsule assembly in an irradiation test device according to any one of claims 1 to 10, characterized in that: The method comprises: When the sample capsule assembly is in an irradiation state, the pressure in the connecting piece is detected, and the amount of gas released from the sample in the corresponding sample capsule assembly is determined by the pressure in the connecting piece.

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