Multi-parameter measurement and control system for irradiation test

Abstract

The invention provides an irradiation test multi-parameter measurement and control system, which relates to the technical field of irradiation tests in nuclear fuel and material piles and comprises a gas regulating subsystem, a parameter measurement and control subsystem and an irradiation test device. The gas regulating subsystem is connected with the irradiation test device and inputs mixed inert gas into the irradiation test device; the parameter measurement and control subsystem is electrically connected with the gas regulation subsystem and is used for regulating gas parameters of the mixed inert gas so as to regulate test condition parameters in the irradiation test device; and the parameter control subsystem is electrically connected with the irradiation test device and is used for carrying out an irradiation test on the tested piece in the irradiation test device so as to collect test result parameters of the tested piece, collecting real-time test condition parameters in the irradiation test device and displaying the real-time test condition parameters and the test result parameters. The measurement and control system has strong systematicness, high safety and high practicability, and provides technical support and data support for ensuring refinement of nuclear fuel and materials and development of safe irradiation tests.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear fuel and material in-pile irradiation testing, and in particular to an irradiation test multi-parameter measurement and control system. Background Art

[0002] The in-pile irradiation test of nuclear fuel and materials is an indispensable intermediate link in the fuel research and development system. It connects the key links from the design of new fuels and materials to actual engineering applications. Its main purpose is to test key components such as new nuclear fuels and cladding materials by simulating neutron and other radiation irradiation in a real reactor environment, so as to comprehensively evaluate their performance, including safety, reliability, economic benefits and technological advancement.

[0003] In-pile irradiation tests are usually conducted in research reactors using the radiation conditions generated by the reactor. In order to accurately control and monitor the parameters during the irradiation process, it is necessary to specially design and build corresponding irradiation devices, test loops, and parameter measurement systems to ensure that the irradiation conditions can be adjusted according to specific requirements and relevant data can be tracked and recorded in real time. With the continuous improvement of the requirements for nuclear fuel and material performance, irradiation tests have become more and more complex and sophisticated. However, considering the extreme working conditions inside the reactor, such as high temperature, high pressure, and strong radiation field, the limited operating space inside the reactor, and the overly complex test mechanism inside the reactor, the existing test platform has limited control and measurement methods for irradiation parameters, and thus lacks systematic and effective measurement and control methods for irradiation tests. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a multi-parameter measurement and control system for irradiation tests, which solves the technical problem that the prior art lacks systematic and effective measurement and control means for irradiation tests.

[0005] The present invention provides a multi-parameter measurement and control system for irradiation test, including a gas adjustment subsystem, a parameter measurement and control subsystem and an irradiation test device;

[0006] The gas regulating subsystem is connected to the irradiation test device and is used to input a mixed inert gas into the irradiation test device;

[0007] The parameter measurement and control subsystem is electrically connected to the gas adjustment subsystem and is used to adjust the gas parameters of the mixed inert gas so as to adjust the test condition parameters in the irradiation test device;

[0008] The parameter control subsystem is also electrically connected to the irradiation test device, and is used to perform irradiation tests on the test pieces in the irradiation test device to collect the test result parameters of the test pieces, and simultaneously collect the real-time test condition parameters in the irradiation test device, and display the real-time test condition parameters and the test result parameters.

[0009] Optionally, the gas adjustment subsystem includes a gas source module, a gas control module and an exhaust gas module;

[0010] The gas source module is connected to the irradiation test device through the gas control module. The gas source module is used to provide a plurality of initial gases of different pressure levels. The gas control module mixes the plurality of initial gases based on preset gas parameters to form a mixed inert gas which is input into the irradiation test device.

[0011] The exhaust gas module is connected to the irradiation test device and is used to receive and process the test exhaust gas in the irradiation test device.

[0012] Optionally, the gas source module includes a plurality of gas source branches, the gas source branches include a high-pressure gas source, an integrated gas circuit, a pressure reducing valve and a gas buffer tank connected in sequence, the high-pressure initial gas provided by the high-pressure gas source is reduced in pressure through the integrated gas circuit and the pressure reducing valve in sequence, and is finally input into the gas buffer tank, wherein the initial gas includes helium, argon and neon;

[0013] The gas control module includes a plurality of gas regulating branches, and the plurality of gas regulating branches are connected to the plurality of gas source branches in a one-to-one correspondence. The initial gas on each gas source branch is merged through the plurality of gas regulating branches to form a mixed inert gas which is input into the irradiation test device. The gas regulating branch regulates the initial gas based on preset gas parameters, wherein the gas regulating branch includes a gas flow controller, a gas component measurement module and a pressure measuring instrument which are connected in sequence;

[0014] The exhaust gas module includes an exhaust gas storage tank and an exhaust gas treatment submodule. The exhaust gas storage tank is connected to the irradiation test device and is used to receive the test exhaust gas in the irradiation test device. The exhaust gas treatment submodule is connected to the exhaust gas storage tank and is used to discharge the test exhaust gas.

[0015] Optionally, the parameter measurement and control system includes an irradiation process parameter control module, an irradiation process parameter acquisition module, a monitoring and early warning remote control module, and an irradiation performance parameter online measurement module;

[0016] The irradiation process parameter control module is electrically connected to the gas regulating subsystem and is used to control the working state of the components in the gas regulating subsystem to adjust the gas parameters of the mixed inert gas;

[0017] The irradiation process parameter acquisition module is electrically connected to the irradiation test device and is used to acquire real-time test condition parameters in the irradiation test device;

[0018] The radiation performance parameter online measurement module is electrically connected to the radiation test device, and is used to perform radiation performance test on the test piece in the radiation test device and collect state parameters of the test piece;

[0019] The monitoring and early warning remote control module is electrically connected to the irradiation process parameter acquisition module and the irradiation performance parameter online measurement module respectively, and is used to obtain the real-time test condition parameters and the test result parameters, and display them.

[0020] Optionally, the test result parameters include irradiation neutron injection rate and state parameters; the irradiation performance parameter online measurement module includes an irradiation neutron injection rate online measurement submodule and an irradiation parameter optical fiber sensing submodule;

[0021] The irradiation neutron fluence rate online measurement submodule is connected to the irradiation test device and is used to monitor the irradiation neutron fluence rate of the test piece in the irradiation test device during the irradiation test;

[0022] The irradiation parameter optical fiber sensor submodule is connected to the irradiation test device and is used to monitor the state parameters of the test piece in the irradiation test device during the irradiation test.

[0023] Optionally, the irradiation neutron fluence rate online measurement submodule includes a self-powered neutron detector probe, a shielded signal transmission cable, a neutron sensitive current processing electronics unit and a first host computer;

[0024] The self-powered neutron detector probe extends into the irradiation test device and is arranged close to the test piece, and is used to monitor the irradiation neutron injection rate of the test piece during the irradiation test. The self-powered neutron detector probe is connected to the neutron sensitive current processing electronics unit through the shielded signal transmission cable, and the neutron sensitive current processing electronics unit is connected to the first host computer. The neutron sensitive current processing electronics unit amplifies and processes the data collected by the self-powered neutron detector probe and transmits it to the first host computer.

[0025] Optionally, the self-powered neutron detector probe comprises a rhodium wire collector, an insulator, an Inconel emitter and an armored signal cable;

[0026] The self-powered neutron detector probe is a cylindrical structure;

[0027] The Inconel emitter is embedded in the rhodium wire collector, and the insulator is filled between the rhodium wire collector and the Inconel emitter;

[0028] The armored signal cable is connected to the Inconel emitter and welded to form an integrated structure. The armored signal cable is connected to the shielded signal transmission cable after extending out of the irradiation test device.

[0029] Optionally, the irradiation parameter optical fiber sensing submodule includes an optical fiber sensing probe, a multi-channel demodulation unit and a second host computer;

[0030] The optical fiber sensing probe extends into the irradiation test device and is fixed on the test piece, and the optical fiber sensing probe is connected to the second host computer through the multi-channel demodulation unit;

[0031] The multi-channel demodulation unit generates an initial optical signal and outputs it to the optical fiber sensing probe. The initial optical signal in the optical fiber sensing probe changes based on the state change of the test piece during the irradiation test, generates a changing optical signal and feeds it back to the multi-channel demodulation unit. The multi-channel demodulation unit converts the changing optical signal into a current signal and transmits it to the second host computer. The second host computer processes the current signal to obtain the state parameters of the test piece during the irradiation test.

[0032] Optionally, the irradiation parameter optical fiber sensor submodule further includes an optical fiber probe pigtail and an optical fiber probe pigtail sealing head;

[0033] The optical fiber sensing probe is a single-mode optical fiber fluorine-doped quartz radiation-resistant optical fiber femtosecond laser engraved grating or Fabry-Perot cavity;

[0034] The optical fiber sensing probe is fused with the optical fiber probe pigtail and is armored with an Inconel stainless steel tube;

[0035] The optical fiber probe pigtail passes through the irradiation test device and is sealed by the optical fiber probe pigtail sealing head, and is connected to the multi-channel demodulation unit through an optical fiber signal cable.

[0036] Optionally, the irradiation test device includes a reactor pressure vessel, an irradiation device test assembly, a test assembly protection tube and a test assembly sealing flange;

[0037] The irradiation device test assembly extends into the reactor pressure vessel in a vertical direction, the test piece is arranged in the irradiation device test assembly, the test assembly protection tube is sleeved on the outer wall of the irradiation device test assembly, and the test assembly sealing flange is arranged at the inlet of the reactor pressure vessel.

[0038] The irradiation test multi-parameter measurement and control system provided by the present invention utilizes a gas adjustment subsystem to realize control and adjustment of the in-pile irradiation test conditions, and utilizes a parameter measurement and control subsystem to realize online measurement of multiple parameters such as real-time test condition parameters of the irradiation environment and test result parameters of the irradiation behavior of the test piece. The gas adjustment subsystem and the parameter measurement and control subsystem are designed in a modular structure based on the use function, and through the cooperation with the irradiation test device, the measurement and control system has a strong systematicity. The measurement and control system as a whole has high safety and high practicality, and provides technical support for ensuring the refinement of nuclear fuel and materials and the implementation of safe irradiation tests. At the same time, the parameter measurement and control subsystem displays the acquired multiple parameters in a timely manner, and provides sufficient data support for the research and development, improvement and safety assessment of nuclear fuel and materials, so as to adapt to the changes in nuclear fuel and material irradiation tests.

[0039] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0040] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0042] Figure 1 A schematic diagram of the overall structure of a multi-parameter measurement and control system for an irradiation test in an embodiment provided in the present application;

[0043] Figure 2 A schematic diagram of the specific structure of a multi-parameter measurement and control system for an irradiation test in an embodiment provided in the present application;

[0044] Figure 3 A schematic diagram of the structure of the gas regulating subsystem in the irradiation test multi-parameter measurement and control system in one embodiment provided in the present application;

[0045] Figure 4 A schematic diagram of the internal structure of an irradiation test device in an irradiation test multi-parameter measurement and control system in an embodiment provided in the present application.

[0046] In the figure:

[0047] 1. Gas conditioning subsystem; 101. Gas source module; 1011. High-pressure gas source; 1012. Gas buffer tank; 102. Gas control module; 1021. Gas flow controller; 1022. Pressure measuring instrument; 103. Exhaust module; 1031. Exhaust storage tank;

[0048] 2. Parameter measurement and control subsystem; 201. Irradiation process parameter control module; 202. Irradiation process parameter acquisition module; 203. Monitoring and early warning remote control module; 204. Irradiation performance parameter online measurement module; 2041. Self-powered neutron detector probe; 2042. Shielded signal transmission cable; 2043. Connector; 2044. Wiring platform connector; 2045. Wiring platform; 2046. Optical fiber signal cable; 2047. Containment penetration; 2048. First host computer; 2049. Optical fiber sensor probe; 20410. Optical fiber probe pigtail sealing head; 20411. Optical fiber probe pigtail; 20412. Second host computer;

[0049] 3. Irradiation test device; 301. Test piece; 302. Reactor pressure vessel; 303. Irradiation device test assembly; 304. Test assembly protection tube; 305. Test assembly sealing flange; DETAILED DESCRIPTION

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] The present invention provides a multi-parameter measurement and control system for irradiation test, such as Figure 1 and Figure 2 As shown, it includes a gas adjustment subsystem 1, a parameter measurement and control subsystem 2 and an irradiation test device 3; wherein the gas adjustment subsystem 1 is connected to the irradiation test device 3, and is used to input a mixed inert gas into the irradiation test device 3; the parameter measurement and control subsystem 2 is electrically connected to the gas adjustment subsystem 1, and is used to adjust the gas parameters of the mixed inert gas to adjust the test condition parameters in the irradiation test device 3; the parameter control subsystem is also electrically connected to the irradiation test device 3, and is used to perform an irradiation test on a test piece 301 in the irradiation test device 3 to collect the test result parameters of the test piece 301, and at the same time collect the real-time test condition parameters in the irradiation test device 3, and display the real-time test condition parameters and the test result parameters.

[0054] The irradiation test multi-parameter measurement and control system provided in the present application utilizes a gas adjustment subsystem 1 to realize control and adjustment of the in-pile irradiation test conditions, and utilizes a parameter measurement and control subsystem 2 to realize online measurement of multiple parameters such as real-time test condition parameters of the irradiation environment and test result parameters of the irradiation behavior of the test piece 301. The gas adjustment subsystem 1 and the parameter measurement and control subsystem 2 are designed in a modular structure based on the usage function, and through the cooperation with the irradiation test device 3, the measurement and control system has a strong systematicity. The measurement and control system as a whole has high safety and high practicality, and provides technical support for ensuring the refinement of nuclear fuel and materials and the implementation of safe irradiation tests. At the same time, the parameter measurement and control subsystem 2 displays the acquired multiple parameters in a timely manner, and provides sufficient data support for the research and development, improvement and safety assessment of nuclear fuel and materials, so as to adapt to changes in nuclear fuel and material irradiation tests.

[0055] Specifically, in the above embodiment, the gas adjustment subsystem 1 includes a gas source module 101, a gas control module 102 and an exhaust gas module 103; the gas source module 101 is connected to the irradiation test device 3 through the gas control module 102, the gas source module 101 is used to provide a plurality of initial gases of different pressure levels, the gas control module 102 mixes the plurality of initial gases based on preset gas parameters, and then forms a mixed inert gas which is input into the irradiation test device 3; the exhaust gas module 103 is connected to the irradiation test device 3, and is used to receive and process the test exhaust gas in the irradiation test device 3.

[0056] In this embodiment, the gas source module 101 can provide initial gases of multiple different pressure levels, providing a diversified basis for subsequent gas mixing; the gas control module 102 accurately mixes multiple gases according to preset parameters to form a mixed inert gas with specific thermophysical properties, thereby being able to accurately adjust the test condition parameters in the irradiation test device 3 to ensure the consistency and repeatability of the experimental conditions, and by quickly adjusting the gas composition to change the temperature and other parameters of the test environment, precise temperature control is achieved, and the test efficiency can be effectively improved; the exhaust gas module 103 is responsible for processing the exhaust gas discharged from the irradiation test device 3, which not only improves the safety of the test, but also reduces the impact on the external environment, and achieves green environmental protection requirements.

[0057] Further, such as Figure 3 As shown, the gas source module 101 includes a plurality of gas source branches, and the gas source branches include a high-pressure gas source 1011, an integrated gas circuit, a pressure reducing valve and a gas buffer tank 1012 connected in sequence. The high-pressure initial gas provided by the high-pressure gas source 1011 is reduced in pressure through the integrated gas circuit and the pressure reducing valve in sequence, and finally input into the gas buffer tank 1012, wherein the initial gas includes helium, argon and neon; the gas control module 102 includes a plurality of gas regulating branches, and the plurality of gas regulating branches are connected to the plurality of gas source branches in a one-to-one correspondence, and the initial gas on each gas source branch is converged by the plurality of gas regulating branches. After being combined, a mixed inert gas is formed and input into the irradiation test device 3, and the gas regulating branch regulates the initial gas based on the preset gas parameters, wherein the gas regulating branch includes a gas flow controller 1021, a gas component measurement module and a pressure measuring instrument 1022 connected in sequence; the exhaust gas module 103 includes an exhaust gas storage tank 1031 and an exhaust gas treatment submodule, the exhaust gas storage tank 1031 is connected to the irradiation test device 3, and is used to receive the test exhaust gas in the irradiation test device 3, and the exhaust gas treatment submodule is connected to the exhaust gas storage tank 1031, and is used to discharge and treat the test exhaust gas.

[0058] In this embodiment, the gas source module 101 includes three gas source branches. The initial gases provided by the high-pressure gas source 1011 in the three gas source branches are helium, argon and neon respectively. The high-pressure initial gas provided by the high-pressure gas source 1011 passes through the integrated gas circuit and the pressure reducing valve in turn, and the initial gas is decompressed and connected to the gas buffer tank 1012, and then connected to each gas regulating branch in the gas control module 102 through the gas buffer tank 1012. The gas regulating branch is sequentially provided with a gas flow controller 1021, a gas component measurement module and a pressure measuring instrument 1022, that is, based on the preset gas parameters, including gas The flow rate, gas component content and gas pressure are used to adjust the initial gas in the gas buffer tank 1012. After completing the gas adjustment of each branch, the three gas adjustment branches are merged, so that the adjusted initial gases in the three gas adjustment branches are mixed to form a mixed inert gas, and then input into the irradiation test device 3 for testing. The gas source module 101 and the gas control module 102 include various conventional components such as valves and controllers. The above components are all controlled by the parameter measurement and control subsystem 2. The mixed inert gas is adjusted by changing the working state of each component to accurately adjust the test temperature of the irradiation test device 3.

[0059] In addition, the gas conditioning subsystem 1 also includes an exhaust gas module 103, and the exhaust gas module 103 specifically includes an exhaust gas storage tank 1031 and an exhaust gas treatment submodule, wherein the exhaust gas storage tank 1031 is connected to the irradiation test device 3. At the same time, the exhaust gas storage tank 1031 is also connected to a valve and various pressure detection equipment. The various devices are connected by valves and metal air pipes to receive and store the test exhaust gas in the irradiation test device 3 to prevent exhaust gas leakage from causing environmental pollution. At the same time, the exhaust gas storage tank 1031 can also be externally connected to the exhaust gas treatment submodule to further detoxify the stored test exhaust gas, or directly discharge it to a designated location.

[0060] Specifically, in the above-mentioned embodiment, the parameter measurement and control subsystem 2 includes an irradiation process parameter control module 201, an irradiation process parameter acquisition module 202, a monitoring and early warning remote transmission control module 203 and an irradiation performance parameter online measurement module 204; the irradiation process parameter control module 201 is electrically connected to the gas adjustment subsystem 1, and is used to control the working state of the components in the gas adjustment subsystem 1 to adjust the gas parameters of the mixed inert gas; the irradiation process parameter acquisition module 202 is electrically connected to the irradiation test device 3, and is used to collect real-time test condition parameters in the irradiation test device 3; the irradiation performance parameter online measurement module 204 is electrically connected to the irradiation test device 3, and is used to perform irradiation tests on the test piece 301 in the irradiation test device 3, and collect the test result parameters of the test piece 301; the monitoring and early warning remote transmission control module 203 is electrically connected to the irradiation process parameter acquisition module 202 and the irradiation performance parameter online measurement module 204, respectively, and is used to obtain real-time test condition parameters and test result parameters, and display them.

[0061] In this embodiment, the parameter measurement and control subsystem 2 can be divided into four modules according to the structure of the functional modules, namely, an irradiation process parameter control module 201, an irradiation process parameter acquisition module 202, a monitoring and early warning remote control module 203 and an irradiation performance parameter online measurement module 204; wherein, the irradiation process parameter control module 201 specifically includes a programmable controller, digital and analog input and output units, electrical devices, communication switches, power regulators and other equipment, which together constitute a set of cabinets, and then can be connected to the various electric valves, flow controllers and power regulators and other basic components in the gas conditioning subsystem 1 through cables to realize the power supply, control and state processing of the pipeline electric valves and flow controllers in the gas conditioning subsystem 1, and can also perform temperature compensation by adjusting the power supply of the power regulator and setting the output current or voltage to the electric heating element of the irradiation test device 3; the irradiation process parameter acquisition module 202 includes a programmable controller and input modules, electrical devices, communication switches, power regulators and other equipment, which together constitute a set of cabinets, and then can be connected to the various electric valves, flow controllers and power regulators and other basic components in the gas conditioning subsystem 1 through cables to realize the power supply, control and state processing of the pipeline electric valves and flow controllers in the gas conditioning subsystem 1, and can also perform temperature compensation by adjusting the power supply of the power regulator and setting the output current or voltage to the electric heating element of the irradiation test device 3 The machine equipment, temperature acquisition submodule and other equipment together constitute a cabinet, which is connected to the pressure transmitters, flow meters, temperature acquisition submodules and radioactive product monitoring instruments in the gas conditioning subsystem 1 through cables, and is used to collect and process the gas pressure, flow, temperature and pressure difference of the irradiation test device 3 in the pipeline of the gas conditioning subsystem 1; the monitoring and early warning remote control module 203 includes multiple industrial control computers, display splicing large screens, video matrix processors, communication switches and other equipment, which together constitute a network cabinet, in which the industrial control computer and the video matrix processor are installed in layers inside the cabinet, and the real-time test condition parameters collected by the irradiation process parameter acquisition module 202 and the test result parameters obtained by the irradiation performance parameter online measurement module 204 are obtained through Ethernet communication control, and then the two types of data are remotely transmitted to the main control room, and the irradiation test measurement and control system host computer software is installed and run on the industrial control computer, and the control operation of the test parameters of the irradiation test is realized through human-computer interaction with the keyboard and mouse.

[0062] Different from the above three functional modules, the irradiation performance parameter online measurement module 204 specifically needs to be connected to the irradiation test device 3 to obtain the test result parameters, wherein the test result parameters include the irradiation neutron injection rate and the state parameters; therefore, the irradiation performance parameter online measurement module 204 includes an irradiation neutron injection rate online measurement submodule and an irradiation parameter optical fiber sensing submodule; the irradiation neutron injection rate online measurement submodule is connected to the irradiation test device 3, and is used to monitor the irradiation neutron injection rate of the test piece 301 in the irradiation test device 3 during the irradiation test; the irradiation parameter optical fiber sensing submodule is connected to the irradiation test device 3, and is used to monitor the state parameters of the test piece 301 in the irradiation test device 3 during the irradiation test.

[0063] Afterwards, the two different test function submodules are split into specific structures. Before the splitting, an irradiation test device 3 provided by the present application needs to be introduced. Figure 2 and Figure 4 As shown, it specifically includes a reactor pressure vessel 302, an irradiation device test assembly 303, a test assembly protection tube 304 and a test assembly sealing flange 305; the irradiation device test assembly 303 extends into the reactor pressure vessel 302 along the vertical direction, the test piece 301 is arranged in the irradiation device test assembly 303, the test assembly protection tube 304 is sleeved on the outer wall of the irradiation device test assembly 303, and the test assembly sealing flange 305 is arranged at the entrance of the reactor pressure vessel 302.

[0064] In this embodiment, the reactor pressure vessel 302 is a cylindrical container, which is specifically used to place the test piece 301 and provide a test environment. The reactor pressure vessel 302 is provided with an opening at the top, and a test assembly sealing flange 305 is provided at the opening, which is used to seal the irradiation device test assembly 303 to prevent gas leakage in the irradiation device test assembly 303. A test assembly protection tube 304 is vertically arranged downward along the opening to play a protective role, and the irradiation device test assembly 303 is arranged in the test assembly protection tube 304, which is specifically used to place the test piece 301 and various other test tools. At the same time, the output end of the gas control module 102 in the gas adjustment subsystem 1 extends into the irradiation device test assembly 303 for inputting mixed inert gas, and the input end of the exhaust gas module 103 in the gas adjustment subsystem 1 also extends into the irradiation device test assembly 303 for recovering the test exhaust gas after the test is completed.

[0065] Furthermore, the irradiation neutron injection rate online measurement submodule includes a self-powered neutron detector probe 2041, a shielded signal transmission cable 2042, a neutron sensitive current processing electronics unit and a first host computer 2048; the self-powered neutron detector probe 2041 extends into the irradiation test device 3 and is arranged close to the test piece 301, and is used to monitor the irradiation neutron injection rate of the test piece 301 during the irradiation test. The self-powered neutron detector probe 2041 is connected to the neutron sensitive current processing electronics unit through the shielded signal transmission cable 2042, and the neutron sensitive current processing electronics unit is connected to the first host computer 2048. The neutron sensitive current processing electronics unit amplifies the data collected by the self-powered neutron detector probe 2041 and transmits it to the first host computer 2048.

[0066] Among them, the neutron sensitive current processing electronics unit includes an experimental weak current amplification unit and a digital signal processing unit. The weak current amplification unit and the digital signal processing unit are connected by a double-shielded two-core cable. The weak current amplification unit adopts filtering and differential three-stage amplification circuit to realize the amplification of pA level weak current to nA level. After filtering, it is collected and processed by the ADC circuit and single-chip microcomputer of the digital signal processing unit, and the parameters are transmitted to the first host computer 2048 through Ethernet; at the same time, the first host computer 2048 installs and runs the irradiation neutron injection rate online measurement host computer software, and human-computer interaction is performed through the keyboard and mouse, which can realize the irradiation test irradiation neutron injection rate parameter display, storage, historical record query level and irradiation neutron injection rate online measurement sub-module control operation.

[0067] Furthermore, the self-powered neutron detector probe 2041 includes a rhodium wire collector, an insulator, an Inconel emitter and an armored signal cable; the self-powered neutron detector probe 2041 is a cylindrical structure; the Inconel emitter is nested in the rhodium wire collector, and the insulator is filled between the rhodium wire collector and the Inconel emitter; the armored signal cable is connected to the Inconel emitter and welded to form an integrated structure, and the armored signal cable extends out of the irradiation test device 3 and is connected to the shielded signal transmission cable 2042.

[0068] In this embodiment, during the irradiation test, the nuclear fuel or material test specimen 301 and the self-powered neutron detector probe 2041 are simultaneously installed in the irradiation device test assembly 303 in the reactor pressure vessel 302, and are sealed and led out of the reactor pressure vessel 302 through an armored signal cable. After connecting the shielded signal transmission cable, the connector 2043 connected to the tail of the shielded signal transmission cable is docked with the wiring platform connector 2044 to achieve conversion with the wiring platform 2045, and then the optical fiber signal cable 2046 passes through the containment penetration 2047 to reach the neutron sensitive current processing electronics unit.

[0069] Furthermore, the irradiation parameter optical fiber sensing submodule includes an optical fiber sensing probe 2049, a multi-channel demodulation unit and a second host computer 20412; the optical fiber sensing probe 2049 extends into the irradiation test device 3 and is fixed on the test piece 301, and the optical fiber sensing probe 2049 is connected to the second host computer 20412 through the multi-channel demodulation unit; the multi-channel demodulation unit generates an initial optical signal and outputs it to the optical fiber sensing probe 2049, the initial optical signal in the optical fiber sensing probe 2049 changes based on the state change of the test piece 301 during the irradiation test, generates a changing optical signal and feeds it back to the multi-channel demodulation unit, the multi-channel demodulation unit converts the changing optical signal into a current signal and transmits it to the second host computer 20412, the second host computer 20412 processes the current signal to obtain the state parameter of the test piece 301 during the irradiation test.

[0070] In this embodiment, the multi-channel demodulation unit includes a fiber grating channel, a light source, an optical isolation device, a tunable optical filter, an optical coupler and a photoelectric converter, which realizes the generation of an initial optical signal and outputs it to the optical fiber sensing probe 2049. The optical fiber sensing probe 2049 reflects the changed optical signal as the irradiation performance of the sample changes to the multi-channel demodulation unit, and then converts the optical signal into a current signal through the multi-channel demodulation unit and transmits it to the second host computer 20412; the second host computer 20412 includes a single-chip controller unit, an analog-to-digital conversion unit, a communication unit and an industrial control host computer, the analog-to-digital conversion unit samples the current signal output by the demodulation unit, and converts the analog voltage signal into a digital signal; the single-chip controller unit runs a data processing program to calculate the corresponding measurement parameter value, and transmits it to the industrial control host computer in real time through the industrial Ethernet for processing. The industrial control host computer is installed and runs the irradiation parameter optical fiber sensing software, and human-computer interaction is performed through the keyboard and mouse, which can realize data processing, curve fitting, algorithm compensation and other data processing, and realize the display and storage of wavelength and measured irradiation parameters.

[0071] Furthermore, the irradiation parameter optical fiber sensing submodule also includes an optical fiber probe pigtail 20411 and an optical fiber probe pigtail sealing head 20410; the optical fiber sensing probe 2049 is a single-mode optical fiber fluorine-doped quartz radiation-resistant optical fiber femtosecond laser engraved grating or Fabry-Perot cavity; the optical fiber sensing probe 2049 is fused with the optical fiber probe pigtail 20411 and armored with Inconel stainless steel tubes; the optical fiber probe pigtail 20411 passes through the irradiation test device 3 and is sealed by the optical fiber probe pigtail sealing head 20410, and is connected to the multi-channel demodulation unit through the optical fiber signal cable 2046.

[0072] In this embodiment, the fiber optic probe pigtail 20411 is connected to the wiring platform connector 2044 through the connector 2043 connected at the tail, thereby realizing the conversion between the wiring platform 2045, and then connecting the fiber optic signal cable 2046 through the containment penetration 2047 to reach the multi-channel demodulation unit, and further connected to the second host computer 20412 through the signal cable.

[0073] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A multi-parameter measurement and control system for irradiation test, characterized in that: It comprises a gas regulating subsystem (1), a parameter measurement and control subsystem (2) and an irradiation test device (3); The gas adjustment subsystem (1) is connected to the irradiation test device (3) and is used to input a mixed inert gas into the irradiation test device (3); The parameter measurement and control subsystem (2) is electrically connected to the gas adjustment subsystem (1) and is used to adjust the gas parameters of the mixed inert gas so as to adjust the test condition parameters in the irradiation test device (3); The parameter control subsystem is also electrically connected to the irradiation test device (3) and is used to perform an irradiation test on the test piece (301) in the irradiation test device (3) to collect test result parameters of the test piece (301), and simultaneously collect real-time test condition parameters in the irradiation test device (3), and display the real-time test condition parameters and the test result parameters.

2. The irradiation test multi-parameter measurement and control system according to claim 1, characterized in that: The gas regulating subsystem (1) comprises a gas source module (101), a gas control module (102) and an exhaust gas module (103); The gas source module (101) is connected to the irradiation test device (3) via the gas control module (102); the gas source module (101) is used to provide a plurality of initial gases of different pressure levels; the gas control module (102) mixes the plurality of initial gases based on preset gas parameters to form a mixed inert gas which is input into the irradiation test device (3); The exhaust gas module (103) is connected to the irradiation test device (3) and is used to receive and process the test exhaust gas in the irradiation test device (3).

3. The irradiation test multi-parameter measurement and control system according to claim 2 is characterized in that: The gas source module (101) comprises a plurality of gas source branches, wherein the gas source branches comprise a high-pressure gas source (1011), an integrated gas circuit, a pressure reducing valve and a gas buffer tank (1012) connected in sequence, and the high-pressure initial gas provided by the high-pressure gas source (1011) is pressure-reduced in sequence through the integrated gas circuit and the pressure reducing valve, and is finally input into the gas buffer tank (1012), wherein the initial gas comprises helium, argon and neon; The gas control module (102) comprises a plurality of gas regulating branches, the plurality of gas regulating branches are connected to the plurality of gas source branches in a one-to-one correspondence, the initial gas on each of the gas source branches is merged through the plurality of gas regulating branches to form a mixed inert gas which is input into the irradiation test device (3), the gas regulating branch regulates the initial gas based on preset gas parameters, wherein the gas regulating branch comprises a gas flow controller (1021), a gas component measurement module and a pressure measuring instrument (1022) which are connected in sequence; The exhaust gas module (103) comprises an exhaust gas storage tank (1031) and an exhaust gas treatment submodule. The exhaust gas storage tank (1031) is connected to the irradiation test device (3) and is used to receive the test exhaust gas in the irradiation test device (3). The exhaust gas treatment submodule is connected to the exhaust gas storage tank (1031) and is used to perform emission treatment on the test exhaust gas.

4. The irradiation test multi-parameter measurement and control system according to claim 1, characterized in that: The parameter measurement and control subsystem (2) comprises an irradiation process parameter control module (201), an irradiation process parameter acquisition module (202), a monitoring and early warning remote transmission control module (203) and an irradiation performance parameter online measurement module (204); The irradiation process parameter control module (201) is electrically connected to the gas regulating subsystem (1) and is used to control the working state of the components in the gas regulating subsystem (1) to adjust the gas parameters of the mixed inert gas; The irradiation process parameter acquisition module (202) is electrically connected to the irradiation test device (3) and is used to acquire real-time test condition parameters in the irradiation test device (3); The radiation performance parameter online measurement module (204) is electrically connected to the radiation test device (3) and is used to perform a radiation performance test on a test piece (301) in the radiation test device (3) and collect test result parameters of the test piece (301); The monitoring and early warning remote control module (203) is electrically connected to the irradiation process parameter acquisition module (202) and the irradiation performance parameter online measurement module (204) respectively, and is used to obtain the real-time test condition parameters and the test result parameters, and display them.

5. The irradiation test multi-parameter measurement and control system according to claim 4, characterized in that: The test result parameters include irradiation neutron injection rate and state parameters; the irradiation performance parameter online measurement module (204) includes an irradiation neutron injection rate online measurement submodule and an irradiation parameter optical fiber sensing submodule; The irradiation neutron fluence rate online measurement submodule is connected to the irradiation test device (3) and is used to monitor the irradiation neutron fluence rate of the test piece (301) in the irradiation test device (3) during the irradiation test; The irradiation parameter optical fiber sensor submodule is connected to the irradiation test device (3) and is used to monitor the state parameters of the test piece (301) in the irradiation test device (3) during the irradiation test.

6. The irradiation test multi-parameter measurement and control system according to claim 5, characterized in that: The irradiation neutron injection rate online measurement submodule comprises a self-powered neutron detector probe (2041), a shielded signal transmission cable (2042), a neutron sensitive current processing electronics unit and a first host computer (2048); The self-powered neutron detector probe (2041) extends into the irradiation test device (3) and is arranged close to the test piece (301) to monitor the irradiation neutron injection rate of the test piece (301) during the irradiation test. The self-powered neutron detector probe (2041) is connected to the neutron sensitive current processing electronics unit via the shielded signal transmission cable (2042), and the neutron sensitive current processing electronics unit is connected to the first host computer (2048). The neutron sensitive current processing electronics unit amplifies the data collected by the self-powered neutron detector probe (2041) and transmits it to the first host computer (2048).

7. The irradiation test multi-parameter measurement and control system according to claim 6, characterized in that: The self-powered neutron detector probe (2041) comprises a rhodium wire collector, an insulator, an Inconel emitter and an armored signal cable; The self-powered neutron detector probe (2041) is a cylindrical structure; The Inconel emitter is embedded in the rhodium wire collector, and the insulator is filled between the rhodium wire collector and the Inconel emitter; The armored signal cable is connected to the Inconel emitter and welded to form an integrated structure; the armored signal cable extends out of the irradiation test device (3) and is connected to the shielded signal transmission cable (2042).

8. The irradiation test multi-parameter measurement and control system according to claim 5, characterized in that: The irradiation parameter optical fiber sensing submodule comprises an optical fiber sensing probe (2049), a multi-channel demodulation unit and a second host computer (20412); The optical fiber sensing probe (2049) extends into the irradiation test device (3) and is fixed on the test piece (301), and the optical fiber sensing probe (2049) is connected to the second host computer (20412) via the multi-channel demodulation unit; The multi-channel demodulation unit generates an initial optical signal and outputs it to the optical fiber sensing probe (2049); the initial optical signal in the optical fiber sensing probe (2049) changes based on the state change of the test piece (301) during the irradiation test, generates a change optical signal and feeds it back to the multi-channel demodulation unit; the multi-channel demodulation unit converts the change optical signal into a current signal and transmits it to the second host computer (20412); the second host computer (20412) processes the current signal to obtain the state parameters of the test piece (301) during the irradiation test.

9. The irradiation test multi-parameter measurement and control system according to claim 8, characterized in that: The irradiation parameter optical fiber sensor submodule also includes an optical fiber probe pigtail (20411) and an optical fiber probe pigtail sealing head (20410); The optical fiber sensing probe (2049) is a single-mode optical fiber fluorine-doped quartz radiation-resistant optical fiber femtosecond laser engraved grating or Fabry-Perot cavity; The optical fiber sensing probe (2049) is fused with the optical fiber probe pigtail (20411) and is armored with an Inconel stainless steel tube; The optical fiber probe pigtail (20411) passes through the irradiation test device (3), is sealed by the optical fiber probe pigtail sealing head (20410), and is connected to the multi-channel demodulation unit via an optical fiber signal cable (2046).

10. The irradiation test multi-parameter measurement and control system according to claim 1, characterized in that: The irradiation test device (3) comprises a reactor pressure vessel (302), an irradiation device test assembly (303), a test assembly protection tube (304) and a test assembly sealing flange (305); The irradiation device test assembly (303) extends into the reactor pressure vessel (302) in a vertical direction, the test piece (301) is arranged in the irradiation device test assembly (303), the test assembly protection tube (304) is sleeved on the outer wall of the irradiation device test assembly (303), and the test assembly sealing flange (305) is arranged at the entrance of the reactor pressure vessel (302).

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