Multi-parameter measurement and control system for irradiation test

Abstract

The application provides a kind of irradiation test multi-parameter measurement and control system, it is related to nuclear fuel and material in-pile irradiation test technical field, including air adjusting subsystem, parameter measurement and control subsystem and irradiation test device;Air adjusting subsystem is connected with irradiation test device, and mixed inert gas is input into irradiation test device;Parameter measurement and control subsystem is electrically connected with air adjusting subsystem, for adjusting the gas parameter of mixed inert gas to adjust the test condition parameter in irradiation test device;Parameter control subsystem is electrically connected with irradiation test device, carries out irradiation test to the test piece in irradiation test device to collect the test result parameter of test piece, and collects the real-time test condition parameter in irradiation test device, and real-time test condition parameter and test result parameter are shown.The above-mentioned measurement and control system has strong systematicness, high safety and high practicability, provides technical support and data support for guaranteeing the development of nuclear fuel and material refinement and safe irradiation test.

Description

Technical Field

[0001] This invention relates to the field of nuclear fuel and material in-pile irradiation testing technology, and particularly to a multi-parameter measurement and control system for irradiation testing. Background Technology

[0002] In-reactor irradiation testing 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-reactor irradiation tests are typically conducted within research reactors, utilizing the radiation conditions generated by the reactor. To precisely control and monitor parameters during the irradiation process, specialized irradiation devices, test loops, and parameter measurement systems must be designed and constructed to ensure that irradiation conditions can be adjusted according to specific requirements and that relevant data can be tracked and recorded in real time. With increasingly stringent requirements for the performance of nuclear fuels and materials, irradiation tests have become increasingly complex and sophisticated. However, considering the extreme operating conditions inside the reactor, such as high temperature, high pressure, and intense radiation fields, coupled with the limited operating space and the highly complex testing mechanisms within the reactor, existing test platforms have limitations in controlling and measuring irradiation parameters, resulting in a lack of systematic and effective measurement and control methods for irradiation tests. Summary of the Invention

[0004] To address the shortcomings of the existing technologies, this invention provides a multi-parameter measurement and control system for irradiation tests, solving the technical problem of the lack of systematic and effective measurement and control methods for irradiation tests in the prior art.

[0005] This invention provides a multi-parameter measurement and control system for irradiation testing, including a gas regulation subsystem, a parameter measurement and control subsystem, and an irradiation testing device;

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

[0007] The parameter measurement and control subsystem is electrically connected to the gas regulation subsystem and is used to adjust the gas parameters of the mixed inert gas in order to adjust the test condition parameters within the irradiation test apparatus.

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

[0009] Optionally, the gas regulation 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 variety of initial gases at different pressure levels. The gas control module mixes the various initial gases based on preset gas parameters to form a mixed inert gas, which is then 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 multiple gas source branches, each of which includes 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 depressurized sequentially through the integrated gas circuit and the pressure reducing valve, and finally input into the gas buffer tank. The initial gas includes helium, argon, and neon.

[0013] The gas control module includes multiple gas regulation branches, which are connected one-to-one with multiple gas source branches. The initial gas in each gas source branch is combined through multiple gas regulation branches to form a mixed inert gas, which is then input into the irradiation test device. The gas regulation branches adjust the initial gas based on preset gas parameters. Each gas regulation branch includes a gas flow controller, a gas component measurement module, and a pressure measuring instrument 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 treat the test exhaust gas for emission.

[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 transmission control module, and an online measurement module for irradiation performance parameters;

[0016] The irradiation process parameter control module is electrically connected to the gas regulation subsystem and is used to control the working state of the components in the gas regulation 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 within the irradiation test device.

[0018] The online measurement module for irradiation performance parameters is electrically connected to the irradiation test device and is used to perform irradiation performance testing on the test specimen in the irradiation test device and collect the state parameters of the test specimen.

[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 acquire the real-time test condition parameters and the test result parameters, and display them.

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

[0021] The online measurement submodule of irradiated neutron flux rate is connected to the irradiation test device and is used to monitor the irradiated neutron flux rate of the test specimen in the irradiation test device during the irradiation test process.

[0022] The irradiation parameter fiber optic sensing submodule is connected to the irradiation test device and is used to monitor the state parameters of the test specimen in the irradiation test device during the irradiation test.

[0023] Optionally, the online measurement submodule for irradiated neutron flux 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 positioned close to the test specimen to monitor the irradiation neutron flux rate of the test specimen during the irradiation test. The self-powered neutron detector probe is connected to the neutron-sensitive current processing electronics unit via the shielded signal transmission cable. 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 before transmitting it to the first host computer.

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

[0026] The self-powered neutron detector probe has a cylindrical structure.

[0027] The Inconel emitter is nested within 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 and welded to the Inconel emitter to form an integral structure. The armored signal cable extends out of the irradiation test device and is connected to the shielded signal transmission cable.

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

[0030] The fiber optic sensing probe extends into the irradiation test device and is fixed on the test piece. The fiber optic 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 fiber optic sensing probe. The initial optical signal in the fiber optic sensing probe changes based on the state changes of the test specimen during the irradiation test, generating a changing optical signal and feeding 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 specimen during the irradiation test.

[0032] Optionally, the irradiation parameter fiber optic sensing submodule further includes a fiber optic probe pigtail and a fiber optic probe pigtail sealing head;

[0033] The fiber optic sensing probe is a single-mode fiber fluorine-doped quartz radiation-resistant fiber femtosecond laser-etched grating or enamel cavity.

[0034] The fiber optic sensing probe is fused to the fiber optic probe pigtail and is armored with an Inconel stainless steel thin tube.

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

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

[0037] The irradiation device test assembly extends vertically into the reactor pressure vessel. The test specimen is placed inside the irradiation device test assembly. A protective tube for the test assembly is fitted onto the outer wall of the irradiation device test assembly. A sealing flange for the test assembly is provided at the inlet of the reactor pressure vessel.

[0038] The multi-parameter measurement and control system for irradiation testing provided by this invention utilizes a gas regulation subsystem to control and adjust the in-reactor irradiation test conditions, and a parameter measurement and control subsystem to achieve online measurement of multiple parameters, including real-time test condition parameters of the irradiation environment and test result parameters of the irradiation behavior of the test specimen. Both the gas regulation subsystem and the parameter measurement and control subsystem are based on a modular structure design for practical use, and through their coordination with the irradiation test device, the measurement and control system possesses strong systemicity. The overall measurement and control system exhibits high safety and high practicality, providing technical support for ensuring the refined and safe conduct of nuclear fuel and material irradiation tests. Simultaneously, the parameter measurement and control subsystem promptly displays the acquired multiple parameters, providing sufficient data support for the research, development, improvement, and safety assessment of nuclear fuel and materials, adapting to changes in nuclear fuel and material irradiation tests.

[0039] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0040] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0041] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0042] Figure 1 A schematic diagram of the overall structure of the multi-parameter measurement and control system for irradiation testing provided in one embodiment of this application;

[0043] Figure 2 A schematic diagram of the specific structure of the multi-parameter measurement and control system for irradiation testing provided in one embodiment of this application;

[0044] Figure 3 A schematic diagram of the gas regulation subsystem in a multi-parameter measurement and control system for irradiation testing provided in this application;

[0045] Figure 4 This is a schematic diagram of the internal structure of the irradiation test device in a multi-parameter measurement and control system for irradiation testing provided in one embodiment of this application.

[0046] In the picture:

[0047] 1. Gas regulation 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 gas module; 1031. Exhaust gas 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 Transmission 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. Fiber Optic Signal Cable; 2047. Containment Penetrator; 2048. First Host Computer; 2049. Fiber Optic Sensing Probe; 20410. Fiber Optic Probe Pigtail Sealing Head; 20411. Fiber Optic Probe Pigtail; 20412. Second Host Computer;

[0049] 3. Irradiation test apparatus; 301. Test specimen; 302. Reactor pressure vessel; 303. Irradiation apparatus test assembly; 304. Test assembly protective tube; 305. Test assembly sealing flange; Detailed Implementation

[0050] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] This invention provides a multi-parameter measurement and control system for irradiation tests, such as... Figure 1 and Figure 2 As shown, the device includes a gas regulation subsystem 1, a parameter measurement and control subsystem 2, and an irradiation test apparatus 3. The gas regulation subsystem 1 is connected to the irradiation test apparatus 3 and is used to input a mixed inert gas into the irradiation test apparatus 3. The parameter measurement and control subsystem 2 is electrically connected to the gas regulation subsystem 1 and is used to adjust the gas parameters of the mixed inert gas to regulate the test condition parameters within the irradiation test apparatus 3. The parameter control subsystem is also electrically connected to the irradiation test apparatus 3 and is used to perform irradiation tests on the test specimen 301 within the irradiation test apparatus 3 to collect the test result parameters of the test specimen 301, and simultaneously collect the real-time test condition parameters within the irradiation test apparatus 3, and display the real-time test condition parameters and test result parameters.

[0054] The multi-parameter measurement and control system for irradiation testing provided in this application utilizes a gas regulation subsystem 1 to control and adjust the in-reactor irradiation test conditions, and a parameter measurement and control subsystem 2 to perform online measurement of multiple parameters, including real-time test condition parameters of the irradiation environment and test result parameters of the irradiation behavior of the test specimen 301. Both the gas regulation subsystem 1 and the parameter measurement and control subsystem 2 are based on a modular structure design for practical use, and through their cooperation with the irradiation test device 3, the measurement and control system possesses strong systemicity. The overall measurement and control system exhibits high safety and high practicality, providing technical support for ensuring the refined and safe conduct of nuclear fuel and material irradiation tests. Simultaneously, the parameter measurement and control subsystem 2 promptly displays the acquired multiple parameters, providing sufficient data support for the research, development, improvement, and safety assessment of nuclear fuel and materials, adapting to changes in nuclear fuel and material irradiation tests.

[0055] Specifically, in the above embodiments, the gas regulation 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 variety of initial gases at different pressure levels. The gas control module 102 mixes the various initial gases based on preset gas parameters to form a mixed inert gas that 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 various pressure levels, providing a diverse basis for subsequent gas mixing; the gas control module 102 accurately mixes various gases according to preset parameters to form a mixed inert gas with specific thermophysical properties, thereby accurately adjusting the test condition parameters within the irradiation test device 3, ensuring the consistency and repeatability of the test conditions, and achieving precise temperature control by rapidly adjusting the gas composition to change parameters such as the temperature of the test environment, which can also effectively improve test efficiency; 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, achieving the requirements of green environmental protection.

[0057] Furthermore, such as Figure 3 As shown, the gas source module 101 includes multiple gas source branches, each including 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 depressurized sequentially through the integrated gas circuit and the pressure reducing valve, and finally input into the gas buffer tank 1012. The initial gas includes helium, argon, and neon. The gas control module 102 includes multiple gas regulation branches, each corresponding to a gas source branch. The initial gas from each gas source branch is collected by the multiple gas regulation branches. The resulting mixed inert gas is input into the irradiation test apparatus 3. The gas regulation branch adjusts the initial gas based on preset gas parameters. The gas regulation 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 apparatus 3 and is used to receive the test exhaust gas in the irradiation test apparatus 3. The exhaust gas treatment submodule is connected to the exhaust gas storage tank 1031 and is used to treat the test exhaust gas for emission.

[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 an integrated gas circuit and a pressure reducing valve in sequence, and then the initial gas is depressurized and connected to the gas buffer tank 1012. The gas buffer tank 1012 is then connected to each gas regulating branch in the gas control module 102. The gas regulating branch is sequentially equipped with a gas flow controller 1021, a gas component measurement module, and a pressure measuring instrument 1022, that is, based on preset gas parameters, including gas... The flow rate, gas component content, and gas pressure are used to regulate the initial gas in the gas buffer tank 1012. After the gas regulation of each branch is completed, the three gas regulation branches are merged, so that the regulated initial gas in the three gas regulation branches is mixed to form a mixed inert gas, which is then input into the irradiation test device 3 for testing. The gas source module 101 and the gas control module 102 contain various valves, controllers, and other conventional components. All of these components are controlled by the parameter measurement and control subsystem 2. By changing the working state of each component, the mixed inert gas is regulated to precisely regulate the test temperature of the irradiation test device 3.

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

[0060] Specifically, in the above 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 online measurement module for irradiation performance parameters 204. The irradiation process parameter control module 201 is electrically connected to the gas regulation subsystem 1 and is used to control the working state of the components in the gas regulation 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 within the irradiation test device 3. The online measurement module for irradiation performance parameters 204 is electrically connected to the irradiation test device 3 and is used to conduct irradiation tests on the test specimen 301 within the irradiation test device 3 and acquire the test result parameters of the test specimen 301. The monitoring and early warning remote transmission control module 203 is electrically connected to the irradiation process parameter acquisition module 202 and the online measurement module for irradiation performance parameters 204, respectively, and is used to acquire and display real-time test condition parameters and test result parameters.

[0061] In this embodiment, the parameter measurement and control subsystem 2 can be divided into four modules according to the structure of functional modules: irradiation process parameter control module 201, irradiation process parameter acquisition module 202, monitoring and early warning remote transmission control module 203, and irradiation performance parameter online measurement module 204. The irradiation process parameter control module 201 specifically includes a programmable logic controller (PLC), digital and analog input / output units, electrical components, a communication switch, a power regulator, and other equipment, forming a cabinet. This cabinet can then be connected via cables to various electric valves, flow controllers, and power regulators in the gas regulation subsystem 1 to achieve power supply, control, and status processing of the pipeline electric valves and flow controllers in the gas regulation subsystem 1. It can also adjust the power supply of the power regulator and set the output current or voltage to the electric heating element of the irradiation test device 3 for temperature compensation. The irradiation process parameter acquisition module 202 includes a PLC and input module, electrical components, a communication switch, and other equipment. The equipment, including the machine and temperature acquisition submodule, together form a cabinet. It is connected via cables to various pressure transmitters, flow meters, temperature acquisition submodules, and radioactive product monitoring instruments within the gas regulation subsystem 1. This cabinet is used to collect and process the gas pressure, flow rate, temperature, and pressure difference of the irradiation test device 3 within the pipeline of the gas regulation subsystem 1. The monitoring and early warning remote control module 203 includes multiple industrial control computers, a large display screen, a video matrix processor, and a communication switch, forming a network cabinet. The industrial control computers and video matrix processor are installed layer by layer inside the cabinet. They acquire real-time test condition parameters collected by the irradiation process parameter acquisition module 202 and test result parameters acquired by the online measurement module 204 for irradiation performance parameters via Ethernet communication. These two types of data are then transmitted to the main control room. The industrial control computers run the irradiation test measurement and control system's host computer software, allowing for human-computer interaction via keyboard and mouse to control the test parameters of the irradiation test.

[0062] Unlike the three functional modules mentioned above, the online measurement module 204 for irradiation performance parameters specifically needs to be connected to the irradiation test device 3 to obtain test result parameters, including irradiation neutron fluence rate and state parameters. Therefore, the online measurement module 204 for irradiation performance parameters includes an online measurement submodule for irradiation neutron fluence rate and an optical fiber sensing submodule for irradiation parameters. The online measurement submodule for irradiation neutron fluence rate is connected to the irradiation test device 3 and is used to monitor the irradiation neutron fluence rate of the test specimen 301 in the irradiation test device 3 during the irradiation test. The optical fiber sensing submodule for irradiation parameters is connected to the irradiation test device 3 and is used to monitor the state parameters of the test specimen 301 in the irradiation test device 3 during the irradiation test.

[0063] The two different test function sub-modules will then be broken down into their specific structures. Before this breakdown, it is necessary to introduce the irradiation test device 3 provided in this application, such as... 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 vertically into the reactor pressure vessel 302, the test specimen 301 is placed inside 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 provided at the inlet of the reactor pressure vessel 302.

[0064] In this embodiment, the reactor pressure vessel 302 is a cylindrical container, specifically used to place the test specimen 301 and provide a test environment. The reactor pressure vessel 302 has an opening at the top, and a test component sealing flange 305 is provided at the opening to seal the irradiation device test component 303 and prevent gas leakage from the irradiation device test component 303. A test component protection pipe 304 is vertically arranged along the opening downwards to provide protection. The irradiation device test component 303 is arranged inside the test component protection pipe 304, specifically used to place the test specimen 301 and other various test tools. At the same time, the output end of the gas control module 102 in the gas regulation subsystem 1 extends into the irradiation device test component 303 to input mixed inert gas, and the input end of the tail gas module 103 in the gas regulation subsystem 1 also extends into the irradiation device test component 303 to recover the test tail gas after the test is completed.

[0065] Furthermore, the online measurement submodule for irradiated neutron flux 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 positioned close to the test specimen 301 to monitor the irradiated neutron flux of the test specimen 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. The neutron-sensitive current processing electronics unit is connected to the first host computer 2048. The neutron-sensitive current processing electronics unit amplifies and processes the data collected by the self-powered neutron detector probe 2041 before transmitting it to the first host computer 2048.

[0066] The neutron-sensitive current processing electronics unit includes a 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 uses a filtering and differential three-stage amplification circuit to amplify the pA-level weak current to the nA level. After filtering, the data is acquired and processed by the ADC circuit of the digital signal processing unit and the microcontroller, and the parameters are transmitted to the first host computer 2048 via Ethernet. At the same time, the first host computer 2048 is installed and runs the online measurement host computer software for irradiation neutron flux rate. Human-computer interaction is performed through keyboard and mouse, which can realize the display, storage, historical record query of irradiation neutron flux rate parameters and control operation of the online measurement submodule of irradiation neutron flux rate.

[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 has a cylindrical structure; the Inconel emitter is nested inside the rhodium wire collector, and the insulator fills the space between the rhodium wire collector and the Inconel emitter; the armored signal cable is connected to and welded to the Inconel emitter to form an integral structure, and the armored signal cable extends out of the irradiation test device 3 and connects 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 inside the reactor pressure vessel 302. The test specimen is sealed out of the reactor pressure vessel 302 through an armored signal cable. After connecting to a shielded signal transmission cable, the cable is connected to a connector 2044 at the end of the shielded signal transmission cable, which then connects to the wiring platform connector 2044 to achieve the conversion between the cable and the wiring platform 2045. Finally, the cable passes through the containment penetration 2047 via an optical fiber signal cable 2046 to reach the neutron sensitive current processing electronics unit.

[0069] Furthermore, the irradiation parameter fiber optic sensing submodule includes a fiber optic sensing probe 2049, a multi-channel demodulation unit, and a second host computer 20412. The fiber optic sensing probe 2049 extends into the irradiation test device 3 and is fixed on the test specimen 301. The fiber optic 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 fiber optic sensing probe 2049. The initial optical signal in the fiber optic sensing probe 2049 changes based on the state changes of the test specimen 301 during the irradiation test, generating a changing optical signal and feeding 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 parameters of the test specimen 301 during the irradiation test.

[0070] In this embodiment, the multi-channel demodulation unit includes a fiber optic grating channel, a light source, an optical isolator, a tunable optical filter, an optical coupler, and a photoelectric converter. It generates an initial optical signal and outputs it to the fiber optic sensing probe 2049. The fiber optic sensing probe 2049 reflects changing optical signals as the irradiation performance of the sample changes, sending these signals to the multi-channel demodulation unit. The multi-channel demodulation unit then converts the optical signals into current signals and transmits them to the second host computer 20412. The second host computer 20412 includes a microcontroller unit, an analog-to-digital converter unit, a communication unit, and an industrial control host computer. The analog-to-digital converter unit samples the current signal output by the demodulation unit and converts the analog voltage signal into a digital signal. The microcontroller unit runs a data processing program to calculate the corresponding measurement parameter values ​​and transmits them in real-time to the industrial control host computer via industrial Ethernet for processing. The industrial control host computer runs fiber optic sensing software for irradiation parameters and allows for human-computer interaction via keyboard and mouse. This enables data processing, curve fitting, algorithm compensation, and other data processing, as well as the display and storage of wavelength and measured irradiation parameters.

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

[0072] In this embodiment, the fiber optic probe pigtail 20411 connects to the wiring platform connector 2044 via the connector 2043 at its tail, enabling conversion between the wiring platform 2045 and the fiber optic signal cable 2046, which passes through the housing penetration 2047 to reach the multi-channel demodulation unit, and is further connected to the second host computer 20412 via a signal cable.

[0073] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A multi-parameter measurement and control system for irradiation testing, characterized in that, It includes a gas regulation subsystem (1), a parameter measurement and control subsystem (2), and an irradiation test device (3); The gas regulation subsystem (1) is connected to the irradiation test device (3) and is used to input mixed inert gas into the irradiation test device (3); The parameter measurement and control subsystem (2) is electrically connected to the gas regulation subsystem (1) and is used to adjust the gas parameters of the mixed inert gas in order 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 conduct irradiation tests on the test specimen (301) in the irradiation test device (3) to collect the test result parameters of the test specimen (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. 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 online measurement module for irradiation performance parameters (204). The irradiation process parameter control module (201) is electrically connected to the gas regulation subsystem (1) and is used to control the working state of the components in the gas regulation 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 within the irradiation test device (3); The online measurement module (204) for irradiation performance parameters is electrically connected to the irradiation test device (3) and is used to perform irradiation performance testing on the test specimen (301) in the irradiation test device (3) and collect the test result parameters of the test specimen (301); The online measurement module (204) for irradiation performance parameters includes an online measurement submodule for irradiation neutron flux, which includes a self-powered neutron detector probe (2041). 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) has a cylindrical structure. The Inconel emitter is nested within the rhodium wire collector, and the insulator fills the space between the rhodium wire collector and the Inconel emitter. The armored signal cable is connected to and welded to the Inconel emitter to form an integral structure. The armored signal cable extends out of the irradiation test device (3) and connects to the shielded signal transmission cable (2042). 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 acquire the real-time test condition parameters and the test result parameters, and display them.

2. The multi-parameter measurement and control system for irradiation testing according to claim 1, characterized in that, The gas regulation 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 variety of initial gases with different pressure levels. The gas control module (102) mixes the various initial gases based on preset gas parameters to form a mixed inert gas that 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 multi-parameter measurement and control system for irradiation testing according to claim 2, characterized in that, The gas source module (101) includes multiple gas source branches, each of which includes a high-pressure gas source (1011), an integrated gas path, 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 depressurized sequentially through the integrated gas path and the pressure reducing valve, and finally input into the gas buffer tank (1012). The initial gas includes helium, argon, and neon. The gas control module (102) includes multiple gas regulation branches, which are connected one-to-one with multiple gas source branches. The initial gas in each gas source branch is combined through multiple gas regulation branches to form a mixed inert gas, which is then input into the irradiation test device (3). The gas regulation branches adjust the initial gas based on preset gas parameters. The gas regulation branches include 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). The exhaust gas treatment submodule is connected to the exhaust gas storage tank (1031) and is used to treat the test exhaust gas for emission.

4. The multi-parameter measurement and control system for irradiation testing according to claim 1, characterized in that, The test result parameters include irradiation neutron flux rate and state parameters; the online measurement module (204) for irradiation performance parameters includes an irradiation parameter fiber optic sensing submodule; The online measurement submodule of irradiated neutron flux rate is connected to the irradiation test device (3) and is used to monitor the irradiated neutron flux rate of the test piece (301) in the irradiation test device (3) during the irradiation test process; The irradiation parameter fiber optic 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.

5. The multi-parameter measurement and control system for irradiation testing according to claim 4, characterized in that, The online measurement submodule for irradiated neutron flux rate includes 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 positioned close to the test piece (301) to monitor the irradiation neutron flux 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). The neutron sensitive current processing electronics unit is connected to the first host computer (2048). The neutron sensitive current processing electronics unit amplifies and processes the data collected by the self-powered neutron detector probe (2041) and transmits it to the first host computer (2048).

6. The multi-parameter measurement and control system for irradiation testing according to claim 4, characterized in that, The irradiation parameter fiber optic sensing submodule includes a fiber optic sensing probe (2049), a multi-channel demodulation unit, and a second host computer (20412); The fiber optic sensing probe (2049) extends into the irradiation test device (3) and is fixed on the test piece (301). The fiber optic 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 fiber optic sensing probe (2049). The initial optical signal in the fiber optic sensing probe (2049) changes based on the state changes of the test specimen (301) during the irradiation test, generating a changing optical signal and feeding 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 parameters of the test specimen (301) during the irradiation test.

7. The multi-parameter measurement and control system for irradiation testing according to claim 6, characterized in that, The irradiation parameter fiber optic sensing submodule also includes a fiber optic probe pigtail (20411) and a fiber optic probe pigtail sealing head (20410); The fiber optic sensing probe (2049) is a single-mode fiber fluorine-doped quartz radiation-resistant fiber femtosecond laser-etched grating or enamel cavity. The fiber optic sensing probe (2049) is fused with the fiber optic probe pigtail (20411) and is armored with an Inconel stainless steel thin tube. The fiber optic probe pigtail (20411) passes through the irradiation test device (3) and is sealed by the fiber optic probe pigtail sealing head (20410), and is connected to the multi-channel demodulation unit through the fiber optic signal cable (2046).

8. The multi-parameter measurement and control system for irradiation testing according to claim 1, characterized in that, The irradiation test device (3) includes a reactor pressure vessel (302), an irradiation test assembly (303), a test assembly protection pipe (304), and a test assembly sealing flange (305); The irradiation device test assembly (303) extends vertically into the reactor pressure vessel (302), the test specimen (301) is placed inside the irradiation device test assembly (303), the test assembly protective tube (304) is sleeved on the outer wall of the irradiation device test assembly (303), and the test assembly sealing flange (305) is provided at the inlet of the reactor pressure vessel (302).

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