A system and method for in-situ spectral measurement of corrosion behavior of reactor cladding materials

Abstract

The present invention establishes a system and method for in-situ spectral measurement of the corrosion behavior of reactor cladding materials. First, the cladding material is placed in a reactor, and then a high temperature and high pressure environment is created in the reactor. Then the reactor is safely placed in an irradiation field created by a radioactive source. During the irradiation process, the detection light can pass through the irradiation window on the heating mechanism and enter the reactor. After the light is emitted, the changes in the materials in the reactor are analyzed online by means of gas chromatograph, liquid chromatograph and infrared spectrometer, and the gas products extracted from the reactor gas sampling pipeline are analyzed by an online analysis system, so as to understand the corrosion behavior of the cladding material under high temperature and high pressure irradiation conditions. And the stability of the simulation system is guaranteed by the pressure measuring pipeline, pressure relief pipeline and temperature sensor, avoiding the occurrence of various dangers.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical analysis equipment, and in particular to a system and method capable of in-situ spectrum measurement. Background Art

[0002] The Fukushima incident once again sounded the alarm for human nuclear safety. As the future pillar energy of mankind, nuclear energy is developing rapidly. Nuclear energy safety, especially nuclear power safety, has become one of the core areas of national security in China and even the world. Due to the hydrothermal reaction of traditional nuclear fuel cladding materials, the heat removal system cannot work normally when the reactor loses the off-site power supply, which leads to hydrogen explosion. Due to the urgent need to study new cladding materials and the extremely high cost of irradiation research, it is generally required to evaluate the materials in a complex coupling environment such as temperature, pressure, water environment and radiation field in an off-pile simulated environment. However, due to the strict requirements of the irradiation field and high temperature and high pressure environment on the detection equipment, the current method mainly adopts the method of taking out the material after corrosion in the simulated environment to evaluate the changes before and after irradiation.

[0003] However, in the material assessment and evaluation, in order to obtain the service life and corrosion mechanism of the material, the real-time changes of the material in the simulated environment are extremely important. Some researchers have adopted the method of water phase flow to react with the flowing water phase that reacts with the material, and detected the water flowing out of the system, trying to obtain the changes in the water phase during the reaction. However, due to the inherent stability of nuclear materials, the impact on water during the corrosion process is relatively small. In the case of flowing water, the effect is more diluted, so the detection is very difficult. Secondly, in the study of the corrosion track, chemical bond breaking, and particle types absorbed by the material in real time by the free radicals generated by the radiolysis of the cladding material at the microscopic scale, in-situ monitoring has practical guiding significance for the microscopic modification of the material. The material property change behavior data and measurement standards at the microscopic scale are an urgent need for improving the performance of the material under complex coupling conditions, so it is necessary to perform a variety of spectral analyses on the samples in the simulated environment. In addition, for the safety of the reactor, the gas products produced by the material under the working environment have a more fatal impact on the safety of the reactor. Therefore, there is no report on the continuous sampling and analysis of the gas in the coupling environment.

[0004] Some researchers have also reported an online high-temperature and high-pressure radiation corrosion simulation system and simulation method. In order to achieve the synergistic effect of multiple factors in the simulated material under high-temperature and high-pressure radiation conditions, theoretical methods such as high-pressure pumps and preheaters are used to increase temperature and pressure. This pressurization method is inefficient under experimental conditions, does not meet the actual conditions of the experiment, and cannot reach a higher test pressure. More importantly, due to the inherent characteristics of the reaction vessel, the detection light cannot enter the reaction window of the simulation system proposed by this design, and therefore it is impossible to realize online real-time spectral measurement and measurement of related experimental data. Summary of the invention

[0005] To solve the above problems, the present invention provides a system that can perform in-situ spectral measurement of the corrosion behavior of reactor cladding materials. The purpose is to introduce a series of in-situ spectroscopy and chromatography analysis methods to better combine in-situ monitoring with material modification, and then use them to study the change laws of reactor cladding materials under complex coupling conditions such as high temperature, high pressure and radiation, and to guide the improvement of traditional cladding materials and the design of new cladding materials.

[0006] To achieve the above object, the technical solution of the present invention is:

[0007] A system for in-situ spectroscopic measurement of corrosion behavior of reactor cladding materials, comprising:

[0008] A radiation source, which provides irradiation to the system;

[0009] The reaction kettle comprises a kettle body, a viewing window and a sealing cover arranged on the kettle body, wherein the top of the sealing cover is connected with a sampling pipeline and a sampling pipeline;

[0010] A heating mechanism, comprising a heating sleeve and an irradiation window provided on the heating sleeve and matching with the viewing window;

[0011] A monitoring mechanism, including an online sample analysis system, wherein the online sample analysis system is connected to the reactor;

[0012] A lifting mechanism, comprising a lifting platform, the reaction kettle and the heating mechanism are arranged on the lifting platform and kept parallel to the radiation source;

[0013] The control system comprises a heating control console arranged in the lifting control room, and the heating control console is control-connected with the heating sleeve via a maze.

[0014] Furthermore, the radiation source is one of gamma rays, X-rays, electron beams, neutron beams, proton beams and heavy ion beams.

[0015] Furthermore, the viewing window is arranged in a slot extending outward from the middle of the kettle body, and the sealing cover is also provided with a pressure measuring line and a pressure relief line, a detachable pressure sensor is installed on the pressure measuring line, and an adjustable safety valve is installed on the pressure relief line; the sampling line is connected to a high-pressure gas generating device and a sampling valve, and the sampling line is connected to a sampling valve.

[0016] Furthermore, the sample online analysis system includes a gas chromatograph, a liquid chromatograph and an infrared fiber spectrometer. The gas chromatograph and the liquid chromatograph are connected to the sampling pipeline respectively, and the infrared fiber spectrometer is connected to the window.

[0017] Furthermore, the sealing cover and the kettle body are sealed by a graphite gasket, and the kettle body is a stainless steel kettle body lined with platinum.

[0018] Furthermore, a magnetic stirrer is provided at the bottom of the heating mechanism, and the magnetic stirrer is magnetically connected to a magnet disposed in the reaction kettle.

[0019] Furthermore, a temperature sensor is provided in the heating mechanism, and the temperature sensor is connected to the heating control console.

[0020] Furthermore, the lifting mechanism is provided with a body and a lifting motor, the lifting platform and the lifting motor are arranged inside the body, and a pulley trolley is installed at the bottom of the body, the lifting platform is connected to the output end of the lifting motor, and the outer shell of the lifting motor adopts a stainless steel shell containing a lead plate interlayer.

[0021] A method for in-situ spectral measurement of corrosion behavior of reactor cladding materials comprises the following steps:

[0022] 1) Add reactor cladding materials and solvents into the reactor, introduce high-pressure gas at the same time, and then place the reactor and heating mechanism into the radiation field formed by the radiation source;

[0023] 2) Control the heating mechanism through the heating console to heat and stir the reactor;

[0024] 3) During the reaction process, chemical analysis of the reactants in the reactor is performed through the viewing window and sampling line.

[0025] Furthermore, the reactor cladding material is one of SiC, FeCrAl, and Zr-4 alloy, and the solvent is deionized water.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention establishes a system for in-situ spectral measurement of the corrosion behavior of reactor cladding materials. First, the cladding material is placed in a reactor, and then a high temperature and high pressure environment is created in the reactor. Then, the reactor is safely placed in an irradiation field created by a radiation source. The irradiation enters the reactor through an irradiation window on a heating mechanism to simulate a reactor environment. Then, the reactor cladding material in the reactor is chemically analyzed by an online analysis system, thereby understanding the corrosion behavior of the cladding material under high temperature and high pressure irradiation conditions.

[0028] 2. The simulation system of the present invention provides an environment for the cladding material that is more in line with the actual situation of the reactor than the prior art by providing a reactor with a window, a heating mechanism, and a high-pressure gas generating device. The stability of the simulation system is ensured by means of a pressure measuring line, a pressure relief line, and a temperature sensor, thereby avoiding the occurrence of various dangers. In addition, the present invention can observe and detect in real time various secondary products produced by the reactor cladding material in the reactor under the action of radiolysis water through an online sample analysis system.

[0029] 3. In the present invention, the reactor and the heating mechanism are arranged on a lifting platform and remain parallel to the radiation source when the radiation source is raised, so that the sample in the reactor can be irradiated continuously and stably without affecting the normal operation state of the radiation source. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the reactor in the present invention;

[0032] Figure 3 This is a structural diagram of the reactor, the heating jacket and the magnetic stirrer in the present invention;

[0033] Figure 4 It is a schematic diagram of the three-dimensional structure of the lifting mechanism in the present invention;

[0034] Figure 5 It is a side view of the lifting mechanism in the present invention;

[0035] Figure 6 This is the infrared spectrum change diagram of SiC in Example 1 of the present invention;

[0036] Figure 7 is Fe in Example 2 of the present invention 3+ UV absorption spectrum;

[0037] Figure 8 This is a schematic diagram of the hydrogen standard curve in Example 3 of the present invention;

[0038] Fig. 9 This is a schematic diagram of a curve showing changes in hydrogen production over time in Example 3 of the present invention;

[0039] Fig.10 This is a schematic diagram of a curve showing changes in hydrogen production over time in Example 4 of the present invention;

[0040] In the figure: 1. Radioactive source; 2. Reactor; 21. Reactor body; 22. Window; 23. Sealing cover; 24. Injection pipeline; 25. Sampling pipeline; 26. Pressure measuring pipeline; 27. Pressure relief pipeline; 3. Heating jacket; 4. Irradiation window; 5. Sample online analysis system; 6. Lifting mechanism; 7. Lifting platform; 8. Machine body; 9. Lifting motor; 10. Lifting control room; 11. Heating control console; 12. High-pressure gas generating device; 13. Pulley cart; 14. Removable pressure sensor; 15. Adjustable safety valve; 16. Injection valve; 17. Sampling valve; 18. Magnetic stirrer. DETAILED DESCRIPTION

[0041] The following is a description of the embodiments, and further details are given of the specific implementation methods of the present invention, such as the shapes and structures of the components involved, the relative positions and connection relationships between the components, the functions and working principles of the components, the manufacturing process and the operation and use methods, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0042] A high-temperature and high-pressure reaction device capable of in-situ spectral measurement of corrosion behavior of reactor cladding materials, comprising:

[0043] A system for in-situ spectroscopic measurement of corrosion behavior of reactor cladding materials, comprising:

[0044] A radiation source, which provides irradiation to the system;

[0045] The reaction kettle comprises a kettle body, a viewing window and a sealing cover arranged on the kettle body, wherein the top of the sealing cover is connected with a sampling pipeline and a sampling pipeline;

[0046] A heating mechanism, comprising a heating sleeve and an irradiation window provided on the heating sleeve and matching with the viewing window;

[0047] A monitoring mechanism, including an online sample analysis system, wherein the online sample analysis system is connected to the reactor;

[0048] A lifting mechanism, comprising a lifting platform, the reaction kettle and the heating mechanism are arranged on the lifting platform and kept parallel to the radiation source;

[0049] The control system comprises a heating control console arranged in the lifting control room, and the heating control console is control-connected with the heating sleeve via a maze.

[0050] In the present invention, a system for in-situ spectral measurement of the corrosion behavior of reactor cladding materials is established. First, the cladding material is placed in a reactor, and then a high temperature and high pressure environment is created in the reactor. Then the reactor is safely placed in an irradiation field created by a radiation source. The irradiation enters the reactor through an irradiation window on a heating mechanism to simulate a reactor environment. Then, the reactants in the reactor are analyzed by an online analysis system, so as to understand the corrosion behavior of the cladding material under high temperature and high pressure irradiation conditions.

[0051] like Figure 1-5 As shown, a system capable of in-situ spectral measurement of corrosion behavior of reactor cladding materials comprises: a radiation source 1, a reactor 2, a heating jacket 3, an irradiation window 4, a sample online analysis system 5 and a lifting mechanism 6, wherein the radiation source 1 provides irradiation for the system when the source is lifted; the reactor 2 comprises a reactor body 21, a viewing window 22 and a sealing cover 23 arranged on the reactor body 21, and a sampling pipeline 24 and a sampling pipeline 25 are connected to the top of the sealing cover 23; the sampling pipeline 24 is connected to a high-pressure gas generating device 12, and the sampling pipeline 25 is respectively connected to a gas chromatograph, a liquid chromatograph and an infrared optical fiber spectrometer of the sample online analysis system 5. The heating jacket 3 is provided with an irradiation window 4 corresponding to the viewing window 22; the heating jacket 3 is controlled and connected to a heating control console 11 arranged in a lifting control room 10 through a maze. The reactor 2 and the heating mechanism are arranged on the lifting platform 7 and remain parallel to the radiation source 1 when the radiation source 1 is lifted, so that the sample in the reactor 2 can be irradiated continuously and stably without affecting the normal operation of the radiation source 1.

[0052] As preferred in this embodiment, the radiation source 1 radiates gamma rays toward the reaction vessel 2 .

[0053] As preferred in this embodiment, the viewing window 22 is arranged in a slot extending outward from the middle part of the kettle body 21, and the sealing cover 23 is also provided with a pressure measuring line 26 and a pressure relief line 27, a detachable pressure sensor 14 is installed on the pressure measuring line 26, and an adjustable safety valve 15 is installed on the pressure relief line 27; the sampling line 24 is connected to a high-pressure gas generating device 12 and a sampling valve 16, and the sampling line 25 is connected to a sampling valve 17, and the high-pressure gas generating device 12 inputs carbon dioxide gas into the reactor 2.

[0054] As preferred in this embodiment, the sample online analysis system 5 includes a gas chromatograph, a liquid chromatograph and an infrared fiber spectrometer, the gas chromatograph and the liquid chromatograph are respectively connected to the sampling pipeline, and the infrared fiber spectrometer is connected to the window 22.

[0055] As preferred in this embodiment, the sealing cover 23 and the kettle body 21 are sealed by a graphite gasket, and the kettle body 21 is a stainless steel kettle body lined with platinum.

[0056] As preferred in this embodiment, a magnetic stirrer 18 is provided at the bottom of the heating mechanism, and the magnetic stirrer 18 is magnetically connected to a magnet disposed in the reaction kettle 2 .

[0057] As preferred in this embodiment, a temperature sensor is provided in the heating mechanism, and the temperature sensor is connected to the heating console 11 .

[0058] As preferred in this embodiment, the lifting mechanism 6 is provided with a body 8 and a lifting motor 9, the lifting platform 7 and the lifting motor 9 are arranged inside the body 8, and a pulley trolley 13 is installed at the bottom of the body 8, the lifting platform 7 is connected to the output end of the lifting motor 9, and the shell of the lifting motor 9 adopts a stainless steel shell containing a lead plate sandwich. The pulley trolley 13 is convenient for being moved to the shielding room where the radiation source 1 is located after the reactor 2 is added with materials, and the stainless steel shell containing a lead plate sandwich adopted by the shell of the lifting motor 9 effectively avoids the problem that the lifting motor 9 is affected by irradiation and cannot work normally.

[0059] A method for in-situ spectral measurement of corrosion behavior of reactor cladding materials comprises the following steps:

[0060] 1) Add reactor cladding material and solvent into the reactor 2, and introduce high-pressure gas at the same time, and then place the reactor 2 and the heating mechanism into the radiation field formed by the radiation source 1;

[0061] 2) Controlling the heating mechanism through the heating control console 11 to heat and stir the reaction kettle 2;

[0062] 3) During the reaction process, chemical analysis of the reactants in the reactor is performed through the viewing window 22 and the sampling line.

[0063] As preferred in this embodiment, the reactor cladding material is SiC, and the solvent is deionized water.

[0064] Example 1

[0065] Measure the infrared spectrum changes of SiC under high temperature radiation conditions;

[0066] 0.6767 g of SiC powder of different particle sizes and 35 ml of deionized water were mixed into a suspension and placed in the reactor. After a stainless steel magnet was placed in the reactor, the sealing cover was sealed and tightened with a wrench. The sampling valve was closed, and the carbon dioxide cylinder tube was connected to the reactor injection line so that the pressure in the reactor reached 1 Mpa. The injection valve was closed, and the reactor was placed on a lifting platform. The irradiation window was perpendicular to the direction of the radiation source, the irradiation aperture was the smallest, and the radiation source was raised. After the radiation source was highly stable, heating began; the target temperature was 573.15K. After heating and stirring for 1 hour, the heating power was turned off, the pressure reached 25Mpa, and the irradiation was 13 hours. The irradiation dose was 480 Gy / h. During the irradiation process, a deuterium lamp was used as the light source to irradiate from one side of the irradiation window, and the reactant was detected by an infrared fiber spectrometer. The absorption spectrum of the reactant was measured after one hour.

[0067] When the reactant SiC undergoes a hydrothermal reaction, SiO2 will be generated. After water radiolysis, highly reactive hydroxyl radicals will be produced, which will further promote the dissolution of SiO2 in high-temperature and high-pressure water to generate Si(OH)4. Figure 6 The measured product shows Si-OH chemical bonds (with infrared absorption peaks), proving that SiC has been corroded.

[0068] Embodiment 2:

[0069] UV spectra of charge transfer at the interface in the reactor;

[0070] 0.06g FeCrAl alloy powder with a particle size of 50 nm and 35 mL of deionized water were mixed into a suspension and placed in the reactor. After a stainless steel magnet was placed in the reactor, the sealing cover was sealed and tightened with a wrench. The sampling valve was closed, and the carbon dioxide cylinder tube was connected to the reactor sampling line so that the pressure in the reactor reached 2 Mpa. The injection valve was closed, and the gas chromatograph was connected to the reactor sampling line. Then the reactor was placed on a lifting platform, the irradiation window was perpendicular to the direction of the radiation source, the irradiation aperture was the smallest, the radiation source was raised, and the irradiation dose was 480 Gy / h. During the irradiation process, a deuterium lamp was used as the light source to irradiate from the irradiation window, and the reactants were detected by the Ocean Optics USB2000+ fiber optic spectrometer. The absorption spectrum of the reactants was measured after one hour of irradiation.

[0071] FeCrAl alloy powder undergoes hydrothermal reaction to generate high-valent iron ions. Figure 7 The product shown in the test contains Fe 3+ , (with ultraviolet absorption peak), it proves that the FeCrAl alloy powder has been corroded.

[0072] Embodiment 3:

[0073] Measure the H2 production of Zr-4 alloy under high temperature radiation conditions. Since the zirconium-water reaction will produce hydrogen, the hydrogen production is measured by gas chromatography to indirectly prove that the reactor cladding material is corroded.

[0074] 0.06g Zr-4 alloy powder with a particle size of 50 nm and 35 mL deionized water were mixed into a suspension and placed in the reactor. A stainless steel magnet was placed in the reactor and the sealing cover was sealed and tightened with a wrench. The sampling valve was closed, and the carbon dioxide cylinder tube was connected to the reactor injection line to make the pressure in the reactor reach 2 Mpa. The injection valve was closed, and the gas chromatograph was connected to the reactor sampling line. The reactor was then placed on a lifting platform, with the irradiation window perpendicular to the direction of the radiation source, the irradiation aperture was the smallest, and the radiation source was raised, while stirring as follows: Figure 8 The duration of the reaction was 480 Gy / h and the irradiation dose was 480 Gy / h. During the reaction, the gas in the reactor was regularly extracted through the sampling pipeline, and the hydrogen production in the reactor was analyzed by gas chromatography.

[0075] The volume of the quantitative tube connected to the sampling valve is 50 ml. The gas sample in the quantitative tube enters the gas chromatograph to detect the hydrogen yield. The specific method is: 50 ml of sample gas enters the quantitative loop (1 ml) of the gas chromatograph. A complete measurement process from intake to exhaust takes 10 minutes. After the measurement is completed, the chromatographic interface will display the peak area of ​​hydrogen. The standard curve made with the standard gas is used for conversion, that is, the molar amount of hydrogen = (peak area + 16891.38) / (1.18*POWER (10,12)) * 50; Fig. 9 The standard curve and the relationship diagram with the change of irradiation dose are the hydrogen production of deionized water without reactants and deionized water with reactants.

[0076] Embodiment 4:

[0077] 0.06g Zr-4 alloy powder with a particle size of 500nm was mixed with 35mL deionized water to form a suspension, and then placed in the reactor. After a stainless steel magnet was placed in the reactor, the sealing cover was sealed and tightened with a wrench. The sampling valve was closed, and the carbon dioxide cylinder tube was connected to the reactor injection line to make the pressure in the reactor reach 2 Mpa. The injection valve was closed, and the gas chromatograph was connected to the reactor sampling line. Then the reactor was placed on a lifting platform, with the irradiation window perpendicular to the direction of the radiation source, the irradiation aperture was the smallest, and the radiation source was raised, while stirring as follows: Fig.10At the time shown, the irradiation dose is 480 Gy / h, the volume of the quantitative tube connected to the sampling valve is 50 ml, and the gas sample in the quantitative tube enters the gas chromatograph to detect the hydrogen yield. The specific method is: 50 ml of sample gas enters the quantitative loop (1 ml) of the gas chromatograph, and a complete measurement process from gas intake to exhaust takes 10 minutes. After the measurement is completed, the chromatographic interface will display the peak area of ​​hydrogen. The standard curve made with the standard gas is used for conversion, that is, the molar amount of hydrogen = (peak area + 16891.38) / (1.18*POWER(10, 12))*50, such as Fig.10 The graph shows the change of hydrogen production over time.

[0078] In the present invention, the system provides an environment for the cladding material that is more in line with the actual situation of the reactor than the prior art by providing a reactor 2 with a window 22, a heating mechanism, and a high-pressure gas generating device 12. The system also ensures the stability of the simulation system and avoids the occurrence of various dangers through a pressure measuring line 26, a pressure relief line 27, and a temperature sensor. In addition, the present invention can observe and detect in real time various secondary products produced by the sample in the reactor 2 under the action of radiolysis water through an online sample analysis system 5.

[0079] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0080] 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 system for in-situ spectral measurement of the corrosion behavior of reactor cladding materials, characterized in that include: A radiation source, which provides irradiation to the system; The reaction kettle comprises a kettle body, a viewing window and a sealing cover arranged on the kettle body, wherein the top of the sealing cover is connected with a sampling pipeline and a sampling pipeline; A heating mechanism, comprising a heating sleeve and an irradiation window provided on the heating sleeve and matching with the viewing window; A monitoring mechanism, including an online sample analysis system, wherein the online sample analysis system is connected to the reactor; A lifting mechanism, comprising a lifting platform, the reaction kettle and the heating mechanism are arranged on the lifting platform and kept parallel to the radiation source; The control system includes a heating control console disposed in the lifting control room, wherein the heating control console is control-connected to the heating jacket via a maze; The sample online analysis system includes a gas chromatograph, a liquid chromatograph and an infrared fiber spectrometer, the gas chromatograph and the liquid chromatograph are respectively connected to the sampling pipeline, and the infrared fiber spectrometer is connected to the window; A magnetic stirrer is provided at the bottom of the heating mechanism, and the magnetic stirrer is magnetically connected to a magnet disposed in the reaction kettle; A temperature sensor is provided in the heating mechanism, and the temperature sensor is connected to the heating console; The lifting mechanism is provided with a body and a lifting motor, the lifting platform and the lifting motor are arranged inside the body, and a pulley trolley is installed at the bottom of the body, the lifting platform is connected to the output end of the lifting motor, and the shell of the lifting motor adopts a stainless steel shell containing a lead plate interlayer.

2. The system capable of in-situ spectral measurement of corrosion behavior of reactor cladding materials according to claim 1, characterized in that: The radiation source is one of gamma rays, X-rays, electron beams, neutron beams, proton beams and heavy ion beams.

3. The system capable of in-situ spectral measurement of corrosion behavior of reactor cladding materials according to claim 1, characterized in that: The viewing window is arranged in a slot extending outward from the middle of the kettle body. The sealing cover is also provided with a pressure measuring line and a pressure relief line. A detachable pressure sensor is installed on the pressure measuring line, and an adjustable safety valve is installed on the pressure relief line. The injection line is connected to a high-pressure gas generating device and an injection valve, and the sampling line is connected to a sampling valve.

4. The system capable of in-situ spectral measurement of corrosion behavior of reactor cladding materials according to claim 1, characterized in that: The sealing cover and the kettle body are sealed by a graphite gasket, and the kettle body is a stainless steel kettle body lined with platinum.

5. A method for in-situ spectral measurement of corrosion behavior of reactor cladding materials, characterized in that: include 1) Add reactor cladding materials and solvents into the reactor, introduce high-pressure gas at the same time, and then place the reactor and the heating mechanism into the radiation field formed by the radiation source; 2) Controlling the heating mechanism through the heating console to heat and stir the reactor; 3) During the reaction process, chemical analysis is performed on the reactants in the reactor through the window and the sampling line; the reactor comprises a reactor body, a window and a sealing cover arranged on the reactor body, and the top of the sealing cover is connected with a sampling line and a sampling line; the reactor also comprises a monitoring mechanism, and the monitoring mechanism comprises a sample online analysis system, and the sample online analysis system is connected to the reactor; the sample online analysis system comprises a gas chromatograph, a liquid chromatograph and an infrared fiber optic spectrometer, and the gas chromatograph and the liquid chromatograph are respectively connected to the sampling line, and the infrared fiber optic spectrometer is docked with the window; the window is arranged on the reactor body; the sampling line and the sampling line are connected to the top of the sealing cover, and the gas chromatograph and the liquid chromatograph of the sample online analysis system are respectively connected to the sampling line, and the infrared fiber optic spectrometer is docked with the window.

6. The method for in-situ spectral measurement of corrosion behavior of reactor cladding materials according to claim 5, characterized in that: The reactor cladding material is one of SiC, FeCrAl and Zr-4 alloy, and the solvent is deionized water.

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