Processing method of fusion device

Abstract

The present application discloses a processing method for a fusion device, which belongs to the field of nuclear fusion technology. The processing method includes: performing at least one vacuum heat treatment on the Dewar embedded part blank; performing cleaning and anti-corrosion treatment and physical correction treatment on the surface of the Dewar embedded part blank after the heat treatment; performing grinding and polishing treatment on the surface of the Dewar embedded part blank after the cleaning and anti-corrosion treatment and physical correction treatment to obtain the Dewar embedded part; transporting the Dewar embedded part to the installation position of the window to be installed, temporarily fixing the Dewar embedded part in the installation position; pouring concrete at the installation position of the Dewar embedded part; after the concrete solidifies, forming a cast-in-place concrete structure in the area below the Dewar embedded part, and a part of the Dewar embedded part is buried in the cast-in-place concrete structure. The use of this method reduces the magnetic permeability of the Dewar embedded part and reduces the risk of element activation to form isotopes with a high irradiation dose rate and a long decay period or isotopes with a high irradiation dose rate and a short decay period.

Description

Technical Field

[0001] The present application belongs to the field of nuclear fusion technology, and in particular relates to a method for processing a fusion device. Background Art

[0002] Nuclear fusion, also known as nuclear fusion, fusion reaction, fusion reaction, or thermonuclear reaction, is a representative type of nuclear fusion device. The tokamak fusion device is a representative type of nuclear fusion device. Its core principle is to confine plasma through toroidal and poloidal magnets and heat the plasma through a central solenoid, thereby achieving the conditions required for nuclear fusion while protecting the fusion device components from the powerful energy generated by the nuclear fusion reaction.

[0003] In the building space where the tokamak fusion device currently carrying out nuclear fusion reactions is located, especially in the core area of ​​the magnetic field, the dewar embedded parts used to connect, fix and support the tokamak components will affect the magnetic confinement state of the fusion device during use, thereby causing plasma configuration shift, reduced plasma heating efficiency, loss of internal components of the fusion device, and even causing serious consequences such as internal components of the fusion device being exposed to high-temperature plasma or the huge energy of nuclear fusion to melt and be damaged.

[0004] Furthermore, while nuclear fusion reactions do not produce long-lived radioactive waste, they can activate elements within the dewar's embedded components. Some of these activated elements can form isotopes with long decay periods and high radiation dose rates, or isotopes with short decay periods and high radiation dose rates. Considering the dewar's embedded components are permanent structures located throughout the core area of ​​the fusion device, operators entering and exiting this area during subsequent operation, maintenance, and upgrades will directly cause radiation damage to the human body if these isotopes are present. This can also lead to radioactive contamination incidents, resulting in even more serious consequences. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a method for processing a fusion device that reduces the magnetic permeability of a dewar embedded component and reduces the risk of element activation to form isotopes with long decay periods and high irradiation dose rates, or isotopes with short decay periods and high irradiation dose rates.

[0006] In a first aspect, the present application provides a method for processing a fusion device, the fusion device comprising a biological shielding wall, a tokamak component, and a dewar embedded component, the biological shielding wall having a window for installing the dewar embedded component, the dewar embedded component being used to fix the tokamak component; the processing method comprising:

[0007] Performing vacuum heat treatment on the Dewar embedded part blank at least once;

[0008] Performing cleaning, anti-corrosion treatment and physical correction treatment on the surface of the Dewar embedded part blank after heat treatment;

[0009] Grinding and polishing the surface of the Dewar embedded part blank after the cleaning, anti-corrosion and physical correction treatments to obtain the Dewar embedded part;

[0010] transporting the Dewar embedded component to the installation position of the window to be installed, and temporarily fixing the Dewar embedded component at the installation position;

[0011] Concrete is poured at the installation position of the Dewar embedded part;

[0012] After the concrete solidifies, a cast-in-place concrete structure is formed in the area below the Dewar embedded component, and a portion of the Dewar embedded component is embedded in the cast-in-place concrete structure.

[0013] According to the processing method of the fusion device of the present application, through the above-mentioned series of special treatments on the dewar embedded component blank and the construction design of the dewar embedded component, on the one hand, the magnetic permeability of the dewar embedded component is effectively reduced, and the negative impact on the magnetic confinement state of the fusion device is alleviated, thereby reducing the occurrence of plasma configuration deviation, reduced plasma heating efficiency, and wear and tear of internal components of the fusion device, thereby effectively maintaining the smooth progress of nuclear fusion reactions in the core area. On the other hand, the contaminants and oxides on the surface of the dewar embedded component after production is completed and during long-term use are reduced, thereby significantly reducing the risk of element activation to form high-irradiation dose rate isotopes with long decay periods or high-irradiation dose rate isotopes with short decay periods, reducing radiation damage to operators during subsequent operation, maintenance, and upgrades, and thereby reducing the occurrence of radioactive material contamination incidents. On the other hand, through temporary fixation and concrete pouring to form a cast-in-place concrete structure, the dewar embedded component is firmly and reliably fixed to the window of the biological shielding wall, enhancing the structural stability and load-bearing capacity of the dewar embedded component, thereby extending the service life of the tokamak components and reducing maintenance costs.

[0014] According to one embodiment of the present application, the step of performing at least one vacuum heat treatment on the Dewar embedded part blank comprises:

[0015] The Dewar embedded part blank is temporarily fixed and sent to an annealing furnace for vacuum heat treatment at least once, and the magnetic permeability of the Dewar embedded part blank is tested after each heat treatment until the relative magnetic permeability of the Dewar embedded part blank is no more than 1.2.

[0016] According to one embodiment of the present application, the surface of the heat-treated Dewar embedded part blank is cleaned, anti-corroded and physically corrected, including:

[0017] Temporarily fixing the Dewar embedded part blank, pickling the Dewar embedded part blank to clean the pollutants on the surface of the Dewar embedded part and forming a passivation film for corrosion protection on the surface of the Dewar embedded part blank, wherein the pickling time is greater than or equal to 30 minutes and less than or equal to 60 minutes;

[0018] The pickled Dewar embedded part blank is temporarily fixed, and the surface of the Dewar embedded part blank is flattened until the flatness of the Dewar embedded part blank is no greater than 1 mm.

[0019] According to one embodiment of the present application, after pickling the Dewar embedded part blank, the method further includes:

[0020] The acid solution remaining on the surface of the Dewar embedded part blank is cleaned, and the pH value of the liquid after each cleaning is tested until the pH value of the liquid after the last cleaning is 6-8.

[0021] According to one embodiment of the present application, the surface of the Dewar embedded part blank after the cleaning, anti-corrosion and physical correction treatment is subjected to grinding and polishing to obtain the Dewar embedded part, including:

[0022] The Dewar embedded part blank after cleaning, anti-corrosion treatment and physical correction treatment is temporarily fixed, and the surface of the Dewar embedded part blank is ground and polished using various types of sandpaper until the surface roughness of the Dewar embedded part is no more than 3.2 μm.

[0023] According to one embodiment of the present application, the material of the Dewar embedded part includes stainless steel, wherein Co<0.2wt% and Nb<0.05wt% in the stainless steel.

[0024] According to one embodiment of the present application, the Dewar embedded part includes an embedded plate and an anchor bar, the anchor bar is installed on the embedded plate, a portion of the embedded plate and the anchor bar are embedded in the cast-in-place concrete structure; before the Dewar embedded part blank is subjected to at least one vacuum heat treatment, the method further includes:

[0025] Cutting the initial material to obtain an anchor bar blank, an auxiliary support structure, and a plurality of plates for forming an embedded slab blank;

[0026] Welding and assembling the plurality of plates into the embedded plate blank, and performing surface leveling treatment on the embedded plate blank;

[0027] The auxiliary support structure is detachably mounted on the embedded plate blank after leveling treatment, and the anchor bar blank is mounted on the embedded plate blank after leveling treatment to obtain the Dewar embedded part blank.

[0028] According to one embodiment of the present application, after performing surface leveling treatment on the embedded plate blank and before performing at least one vacuum heat treatment on the Dewar embedded part blank, the method further includes:

[0029] The surface of the embedded slab body is preliminarily ground and polished.

[0030] According to one embodiment of the present application, the auxiliary support structure is detachably mounted on the embedded plate blank after leveling, and the anchor bar blank is mounted on the embedded plate blank after leveling to obtain the Dewar embedded part blank, including:

[0031] Installing the auxiliary support structure on the embedded slab body through a detachable connector;

[0032] Welding the anchor bar blank to the surface of the embedded plate blank; or welding a sleeve with an inner thread interface to the surface of the embedded plate blank, and tightening the outer thread of the anchor bar blank to the inner thread interface of the sleeve;

[0033] Furthermore, before performing cleaning, anti-corrosion treatment and physical correction treatment on the surface of the heat-treated Dewar embedded part blank, the processing method further comprises:

[0034] The detachable connecting piece is disassembled to remove the auxiliary supporting structure from the embedded slab blank.

[0035] According to one embodiment of the present application, the embedded plate is provided with a vibration hole; the concrete pouring at the installation position of the Dewar embedded part includes:

[0036] Before pouring concrete, protecting the surface of the portion of the embedded plate that does not contact the cast-in-place concrete structure;

[0037] During the concrete pouring process, a vibrator is passed through the vibrating hole to vibrate the lower layer of concrete.

[0038] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0040] Figure 1 It is a schematic flow chart of a method for processing a fusion device provided in an embodiment of the present application;

[0041] Figure 2 is a schematic structural diagram of a fusion device provided in an embodiment of the present application;

[0042] Figure 3 This is a schematic structural diagram of the Dewar embedded parts and cast-in-place concrete structure provided in an embodiment of the present application;

[0043] Figure 4 This is a schematic structural diagram of the Dewar embedded component provided in an embodiment of the present application;

[0044] Figure 5 This is a schematic diagram of the assembly of the Dewar embedded part blank and the auxiliary support structure provided in an embodiment of the present application.

[0045] Reference numerals:

[0046] Fusion device 1;

[0047] Biological shielding wall 10, window 101;

[0048] Dewar embedded part 20, Dewar embedded part blank 20a, embedded plate 21, embedded plate blank 21a, horizontal section 211, vertical section 212, inclined section 213, anchor bar 22, anchor bar blank 22a, vibrating hole 201;

[0049] Cast-in-place concrete structure 30;

[0050] Connecting plate 40;

[0051] Auxiliary support structure 2. DETAILED DESCRIPTION

[0052] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0053] The present application discloses a method for manufacturing a fusion device 1 .

[0054] Reference below Figure 1-Figure 5 A method for manufacturing the fusion device 1 according to an embodiment of the present application is described.

[0055] In some embodiments, as Figure 2 As shown, the fusion device 1 includes a biological shielding wall 10, a tokamak component and a dewar embedded component 20. The biological shielding wall 10 is provided with a window 101 for installing the dewar embedded component 20, and the dewar embedded component 20 is used to fix the tokamak component.

[0056] The tokamak components can be directly installed on the dewar embedded component 20, or indirectly installed on the dewar embedded component 20 through a transition structure, and the embodiments of the present application do not limit this.

[0057] For example, Figure 2 As shown, the Tokamak component is indirectly mounted on the Dewar embedded part 20 via a connecting plate 40 provided on the inner side of the window 101 .

[0058] like Figure 1 As shown, the processing method of the fusion device 1 includes: step 110, step 120, step 130, step 140, step 150 and step 160.

[0059] Step 110: Perform at least one vacuum heat treatment on the Dewar embedded part blank 20a.

[0060] In practice, vacuum heat treatment involves heating and cooling the Dewar insert blank 20a in a vacuum environment. Depending on the material type of the Dewar insert blank 20a, an appropriate temperature range and holding time are selected. The vacuum level must be controlled to ensure that the Dewar insert blank 20a is free of oxidation and decarburization. Vacuum heat treatment is performed at least once, and complex structures can be treated repeatedly.

[0061] It is understood that during the manufacturing process of the Dewar embedded part blank 20a, residual stress is generated within the Dewar embedded part blank 20a, which can affect the material's performance. The vacuum environment prevents the Dewar embedded part blank 20a from reacting with oxygen in the air during heating. Heat treatment can change the crystal structure and microstructure of the Dewar embedded part blank 20a, effectively reducing the residual stress generated within the Dewar embedded part blank 20a, thereby lowering the magnetic permeability of the Dewar embedded part blank 20a.

[0062] Step 120 : performing cleaning, anti-corrosion treatment and physical correction treatment on the surface of the heat-treated Dewar embedded part blank 20 a .

[0063] Among them, the cleaning and anti-corrosion treatment may include but is not limited to pickling, solvent wiping, sandblasting, applying anti-corrosion coating or ultrasonic cleaning, etc., and the embodiments of the present application are not limited to this.

[0064] Physical correction processing may include but is not limited to hydraulic press correction, mechanical press correction or laser correction, and the embodiments of the present application are not limited to this.

[0065] The cleaning and anti-corrosion treatment removes contaminants such as dust, oil, and rust from the surface of the Dewar embedded part 20a. It also forms an anti-corrosion protective film on the surface of the Dewar embedded part 20a, preventing corrosion during subsequent use. This significantly reduces surface contaminants and oxides, not only lowering the magnetic permeability of the Dewar embedded part 20a but also effectively alleviating the problem of pollutants and oxides being easily activated to form isotopes. Physical correction treatment aims to increase the geometric flatness of the surface of the Dewar embedded part 20a, reduce surface irregularities, and mitigate magnetic permeability fluctuations caused by localized stress concentration, thereby further reducing the magnetic permeability of the Dewar embedded part 20a.

[0066] Step 130 , grinding and polishing the surface of the Dewar embedded part blank 20 a after the cleaning, anti-corrosion and physical correction treatments to obtain the Dewar embedded part 20 .

[0067] Among them, the grinding and polishing process may include but is not limited to mechanical polishing or electrolytic polishing, etc., and the embodiment of the present application does not limit this.

[0068] Grinding and polishing can further reduce defects such as pits and scratches on the surface of the Dewar embedded part 20a. These defects not only affect the aesthetics of the Dewar embedded part 20, but more importantly, may affect the material's magnetic permeability. Defects are prone to moisture accumulation, which easily absorbs impurities and, in a nuclear fusion reaction environment, may form a large number of high-dose-rate isotopes. Grinding and polishing can effectively reduce surface roughness, eddy current losses, and localized magnetic field concentration, thereby reducing the overall magnetic permeability of the Dewar embedded part 20a. It also reduces the attachment points for moisture and contaminants, thereby reducing the probability of moisture and contaminants accumulating at defects, leading to electrochemical corrosion and radiation activation.

[0069] Step 140 : transport the Dewar embedded component 20 to the installation position of the window 101 to be installed, and temporarily fix the Dewar embedded component 20 at the installation position.

[0070] In actual implementation, the finished product of the Dewar embedded part 20 is properly packaged and transported to the construction site. Specifically, the surface of the Dewar embedded part 20 exposed to the concrete needs to be effectively protected with plastic film and liner before being shipped to the site where the biological shielding wall 10 is located. The installation position of the Dewar embedded part 20 in the corresponding window 101 of the biological shielding wall 10 is measured and positioned; the Dewar embedded part 20 is first transported to the corresponding window 101 of the biological shielding wall 10, and then accurately adjusted according to the actual measured position. Specifically, the construction personnel can use the building measurement reference network to accurately locate and lay out the axis and elevation of the installation position of the Dewar embedded part 20 in the window 101 to be installed. The construction personnel can use the lifting equipment to lift the Dewar embedded part 20 to the corresponding window 101, or the construction personnel can directly carry the Dewar embedded part 20 to the corresponding window 101 by hand. After transporting it to the window 101, it is fine-tuned according to the previous layout and measurement position. The error of the axis and elevation of the installation position is required to be controlled within ±3mm. After confirming the final position of the Dewar embedded part 20, the construction personnel can temporarily fix the Dewar embedded part 20 by tying steel bars, supporting scaffolding formwork or temporarily welding other structural tooling supports, so that the Dewar embedded part 20 will not be displaced during the subsequent cast-in-place concrete process.

[0071] Step 150: pour concrete at the installation position of the Dewar embedded part 20.

[0072] The purpose of pouring concrete is to fix the Dewar embedded part 20 in the corresponding window 101 of the biological shielding wall 10. Concrete has good compressive resistance and durability. After solidification, it can form an integral structure with the Dewar embedded part 20, thereby enhancing the stability and bearing capacity of the Dewar embedded part 20.

[0073] In actual implementation, the installation position of the Dewar embedded part 20 is poured in layers. Before pouring, the surface of the Dewar embedded part 20 exposed to the concrete is effectively protected to be isolated from the concrete. During the pouring process, the position change of the Dewar embedded part 20 must be monitored.

[0074] Step 160 : After the concrete solidifies, a cast-in-place concrete structure 30 is formed in the area below the Dewar embedded component 20 , and a portion of the Dewar embedded component 20 is embedded in the cast-in-place concrete structure 30 .

[0075] In actual implementation, after the concrete solidifies, a solid cast-in-place concrete structure 30 is formed, in which a portion of the dewar embedded part 20 is embedded. This can more firmly fix the dewar embedded part 20 and prevent it from loosening or shifting during the operation of the nuclear fusion device 1. After the concrete is poured, it needs to be cured for a period of time. After the curing is completed, the surface protection of the dewar embedded part 20 can be removed and cleaned. After that, the key indicators such as the installation position, elevation, surface flatness and roughness of the dewar embedded part 20, and whether the poured concrete is hollow are reviewed. Finally, effective protection is re-applied until the handover.

[0076] It should be noted that after the surface of the Dewar embedded part blank 20a, which has undergone cleaning, anti-corrosion treatment, and physical correction treatment, is polished and polished to obtain the Dewar embedded part 20, and before the Dewar embedded part 20 is transported to the installation location of the window 101 to be installed and temporarily fixed in the installation location in step 140, the completed Dewar embedded part 20 needs to be structurally inspected. Specifically, the external dimensions of the Dewar embedded part 20 are inspected, and each batch of Dewar embedded parts 20 is randomly inspected. In accordance with design requirements, the randomly inspected Dewar embedded parts 20 are subjected to destructive tests, namely, tests of their compressive, shear, and bending resistance. If the qualified rate of the random inspection meets the requirements, the Dewar embedded parts 20 of that batch are transported to the construction site for use.

[0077] The processing method of the fusion device 1 provided in the embodiment of the present application, through the above-mentioned series of special treatments on the Dewar embedded part blank 20a and the construction design of the Dewar embedded part 20, on the one hand, effectively reduces the magnetic permeability of the Dewar embedded part 20, alleviates the negative impact on the magnetic confinement state of the fusion device 1, thereby reducing the occurrence of plasma position deviation, reduced plasma heating efficiency and loss of internal components of the fusion device 1, thereby effectively maintaining the smooth progress of the nuclear fusion reaction in the core area, and on the other hand, reduces the contaminants and oxides on the surface of the Dewar embedded part 20 after production is completed and during long-term use. , thereby greatly reducing the risk of element activation to form high irradiation dose rate isotopes with long decay periods or high irradiation dose rate isotopes with short decay periods, reducing the radiation damage to operators during subsequent operation, maintenance and upgrading and transformation, and thus reducing the occurrence of radioactive material contamination incidents. On the other hand, by temporarily fixing and pouring concrete to form a cast-in-place concrete structure 30, the dewar embedded part 20 is firmly and reliably fixed in the window 101 of the biological shielding wall 10, enhancing the structural stability and bearing capacity of the dewar embedded part 20, thereby extending the service life of the tokamak components and reducing maintenance costs.

[0078] In some embodiments, step 110, performing at least one vacuum heat treatment on the Dewar embedded component blank 20a, includes:

[0079] The Dewar embedded part blank 20a is temporarily fixed and sent to the annealing furnace for vacuum heat treatment at least once. The magnetic permeability of the Dewar embedded part blank 20a is tested after each heat treatment until the relative magnetic permeability of the Dewar embedded part blank 20a is not greater than 1.2.

[0080] It should be noted that the relative magnetic permeability of the Dewar embedded part blank 20a is the ratio of the actual magnetic permeability of the Dewar embedded part blank 20a to the vacuum magnetic permeability.

[0081] In practice, the Dewar-embedded blank 20a can be secured to the annealing furnace carrier using mechanical clamps, low-temperature welding, or vacuum adsorption to prevent deformation due to gravity or thermal stress at high temperatures. The choice of securing method should balance ease of loading and unloading with uniform heat conduction. The annealing furnace can be a vacuum annealing furnace with high-precision temperature control and high vacuum maintenance capabilities, such as a horizontal or vertical vacuum annealing furnace. Based on the size and shape of the Dewar-embedded blank 20a, an annealing furnace with an appropriately sized furnace chamber should be selected to ensure uniform heating of the Dewar-embedded blank 20a within the furnace. If the relative magnetic permeability of the Dewar-embedded blank 20a remains greater than 1.2 after a single heat treatment, adjust the heat treatment parameters (such as increasing the vacuum level, extending the holding time, or adding a tempering step), and repeat the securing-heat treatment-testing process until the standard is met. During the heat treatment process, the vacuum degree in the annealing furnace needs to be maintained within a certain range to prevent the Dewar embedded part blank 20a from undergoing an oxidation reaction with gases such as oxygen at high temperature.

[0082] Among them, the magnetic permeability detection can adopt the contact magnetic ring method, non-contact eddy current scanning or resonance method, etc., and the embodiments of the present application do not limit this.

[0083] The processing method of the fusion device 1 provided in the embodiment of the present application can effectively control and optimize the quality of the Dewar embedded part blank 20a through the above-mentioned mechanism design of forcing the relative magnetic permeability to meet the standard, and accurately control the relative magnetic permeability of each Dewar embedded part blank 20a after heat treatment to be within a range of no more than 1.2. It can adapt to raw materials of different purities, compensate for material defects through process adjustments, thereby improving compatibility. At the same time, only additional annealing is performed on the blanks that do not meet the standards, avoiding excessive processing of all blanks, saving energy consumption, and reducing quality control costs. Combined with the temporary fixed setting, the probability of the Dewar embedded part blank 20a sagging or twisting due to its own weight in the high-temperature softening state is reduced, laying the foundation for subsequent physical correction, polishing and other steps, maintaining the final surface accuracy to meet subsequent installation requirements, thereby improving production yield.

[0084] In some embodiments, step 120, cleaning, anti-corrosion and physical correction treatment are performed on the surface of the heat-treated Dewar embedded part blank 20a, including:

[0085] Temporarily fix the Dewar embedded part blank 20a, and pickle the Dewar embedded part blank 20a to clean the pollutants on the surface of the Dewar embedded part 20 and form a passivation film for corrosion protection on the surface of the Dewar embedded part blank 20a, wherein the pickling time is greater than or equal to 30 minutes and less than or equal to 60 minutes;

[0086] The pickled Dewar embedded part blank 20a is temporarily fixed, and the flatness of the surface of the Dewar embedded part blank 20a is corrected until the flatness of the Dewar embedded part blank 20a is no greater than 1 mm.

[0087] The Dewar embedded part blank 20a can be temporarily fixed in the pickling tank by mechanical clamps, vacuum adsorption or temporary welding, etc., and this embodiment of the present application does not limit this.

[0088] Depending on the material of the Dewar embedded part blank 20a and the type of surface contaminants, different types of pickling solutions with different concentrations are selected. For example, for the Dewar embedded part blank 20a made of stainless steel, a nitric acid or sulfuric acid solution with a concentration of 10% to 20% can be used for pickling.

[0089] The pickling time should be strictly controlled between 30 minutes and 60 minutes to ensure that the contaminants on the surface of the Dewar embedded part 20a are fully removed and a uniform and dense passivation film is formed. For example, for Dewar embedded part 20a with less surface contaminants, the pickling time can be set to 30 minutes; while for Dewar embedded part 20a with more or more stubborn surface contaminants, the pickling time can be appropriately extended to 45 minutes to 60 minutes.

[0090] The Dewar embedded part blank 20a can be temporarily fixed on the correction workbench by means of mechanical clamps, vacuum adsorption or temporary welding, etc., and this embodiment of the present application does not limit this.

[0091] Physical correction can be implemented in ways that include but are not limited to at least one of the following:

[0092] First, mechanical pressure correction.

[0093] In this embodiment, specialized correction equipment, such as a hydraulic press or jack, is used to apply appropriate pressure to the surface of the Dewar embedded part blank 20a, thereby cold-correcting the deformed portion. During the correction process, the pressure and duration of application are appropriately adjusted based on the material and degree of deformation of the Dewar embedded part blank 20a to avoid damage to the Dewar embedded part blank 20a due to excessive pressure or prolonged application.

[0094] Second, laser measurement feedback correction.

[0095] In this embodiment, a laser measuring device is used to measure the surface flatness of the Dewar insert blank 20a in real time, and the measurement results are fed back to the correction control system. Based on the measurement results, the control system automatically adjusts the correction device parameters, such as the pressure level and the application position, to achieve precise correction of the surface flatness of the Dewar insert blank 20a.

[0096] The processing method of the fusion device 1 provided in the embodiment of the present application can completely remove surface contaminants and prevent impurities from affecting the magnetic permeability through the above-mentioned pickling treatment and the design of forced flatness. At the same time, the passivation film formed can effectively resist the corrosive medium in the nuclear fusion environment, reduce the high radiation dose isotopes produced by oxidation, reduce the radiation risk to workers, ensure the safety of the long-term use of the Dewar embedded part 20, and reduce the local magnetic field distortion caused by the uneven surface, improve the uniformity of the magnetic field of the fusion device 1, effectively reduce the plasma configuration deviation, and at the same time, the flat surface is also conducive to the subsequent grinding and polishing process, improving the processing accuracy and quality. In addition, combined with the processing sequence design of pickling first and then correcting, the process is coordinated and optimized. The hard oxide on the surface of the Dewar embedded part blank 20a is removed before correction to prevent defects caused by pressing into the substrate during pressurization. In addition, pickling can soften the Dewar embedded part blank 20a, reduce the pressure required for correction, and reduce the generation of new internal stress.

[0097] In some embodiments, after pickling the Dewar embedment blank 20a, step 120 further includes:

[0098] The acid solution remaining on the surface of the Dewar embedded part blank 20a is cleaned, and the pH value of the liquid after each cleaning is tested until the pH value of the liquid after the last cleaning is 6-8.

[0099] In actual implementation, after pickling, clean water can be used to clean the acid attached to the surface of the Dewar embedded part blank 20a. Specifically, the pickled blank is placed in a dedicated cleaning tank, and clean water is sprayed onto the surface of the Dewar embedded part blank 20a through a high-pressure nozzle, so that the water flow can flush every corner of the Dewar embedded part blank 20a and remove residual acid. At the same time, a drain outlet can be set at the bottom of the cleaning tank to discharge the wastewater containing acid in a timely manner. For Dewar embedded part blanks 20a with complex structures and many gaps, an ultrasonic cleaning machine is also used for cleaning. The Dewar embedded part blank 20a is placed in a cleaning tank filled with clean water, and the ultrasonic generator is turned on. The cavitation effect of the ultrasonic wave is used to make the acid fall off the surface of the blank. After each cleaning, the pH value of the drainage water can be tested with blue dot liquid or pH test paper. The cleaning cycle is repeated until the drainage water is neutral, that is, the pH value is 6 to 8. Specifically, if the pH value is less than 6, it means that the acid has not been cleaned thoroughly, and continue cleaning; if the pH value is greater than 8, there may be a problem with the water quality of the cleaning water or alkaline substances have been introduced during the cleaning process. The cleaning water needs to be replaced and cleaned again until the pH value of the liquid after the last cleaning is stable between 6 and 8.

[0100] The processing method for the fusion device 1 provided in the embodiment of the present application, through the design of the aforementioned safety termination mechanism for neutralization cleaning added after the pickling step, combined with the quantification of cleanliness by chemical indicators, removes as much residual acid as possible from the surface of the Dewar embedded component blank 20a, preventing residual acid from damaging the passivation film formed after pickling, allowing the passivation film to continue to exert its anti-corrosion effect, reducing the risk of high-irradiation isotope radiation due to corrosion, ensuring personnel safety, and reducing the risk of residual acid seeping into concrete joints and corroding steel bars, thereby extending the service life of the biological shielding wall 10. At the same time, it effectively alleviates the hidden dangers of secondary chemical reactions caused by residual acid, reduces the risk of acid reacting with abrasives in the subsequent polishing process or other materials during the installation process, ensures that the magnetic permeability of the Dewar embedded component 20 is not affected, maintains the stability of the magnetic field of the fusion device 1, and prevents the plasma configuration from shifting due to changes in magnetic properties. In addition, the clean neutral surface provides a stable foundation for subsequent physical correction, avoids surface slippage or material property changes caused by acid residue, and maintains correction accuracy and subsequent assembly reliability.

[0101] In some embodiments, step 130, grinding and polishing the surface of the Dewar embedded part blank 20a after cleaning, anti-corrosion treatment and physical correction treatment to obtain the Dewar embedded part 20, includes:

[0102] The Dewar embedded part blank 20a after cleaning, anti-corrosion treatment and physical correction treatment is temporarily fixed, and the surface of the Dewar embedded part blank 20a is ground and polished using various types of sandpaper until the surface roughness of the obtained Dewar embedded part 20 is no more than 3.2μm.

[0103] The Dewar embedded part blank 20a can be temporarily fixed on the polishing workbench by means of mechanical clamps or vacuum adsorption, etc., which is not limited in this embodiment of the present application.

[0104] It is understood that the operator can use various types of sandpaper to perform a step-by-step polishing process on the surface of the Dewar embedded part blank 20a to avoid scratches caused by step-by-step polishing. The surface roughness is ≤ 3.2μm, so that the surface of the Dewar embedded part blank 20a reaches a near-mirror finish. The workpiece is fixed throughout the polishing process to prevent vibration from affecting the polishing effect.

[0105] For example, first, the operator can use coarse sandpaper manually or with an electric grinder to perform rough grinding to remove obvious bumps, burrs and large scratches on the surface, quickly adjust the surface flatness, and initially reduce the roughness. Afterwards, the operator can change to sandpaper with higher mesh counts for medium grinding to further refine the surface, eliminate the marks left by the rough grinding, and make the surface smoother in preparation for fine grinding. Then, the operator can further use sandpaper with higher mesh counts for fine grinding to carefully handle minor surface defects and gradually approach the target roughness. Finally, the operator can use extremely fine sandpaper with extremely high mesh counts or polishing paste with a polishing cloth to polish the surface to achieve a mirror effect, ensuring that the roughness is no more than 3.2μm. During the process, the roughness meter can be used for real-time detection, and the operation will be stopped when the standard is met.

[0106] The processing method of the fusion device 1 provided in the embodiment of the present application controls the surface roughness to below 3.2 μm through the above-mentioned multi-stage grinding and polishing process design, significantly reducing defects such as micro-protrusions, pits, and scratches on the surface of the dewar embedded part 20, thereby reducing local magnetic field distortion caused by surface unevenness and reducing eddy current loss, thereby making the magnetic permeability of the dewar embedded part 20 more stable, reducing magnetic field interference, and ensuring stable operation of the plasma. At the same time, the smooth surface is not prone to water accumulation and residual impurities, reducing electrochemical corrosion and dirt accumulation, protecting the passivation film formed by the clean anti-corrosion treatment, and extending the service life of the dewar embedded part 20 in the core area of ​​the fusion device 1, thereby effectively inhibiting the activation of elements caused by pollutants and late oxides, and thereby reducing the risk of producing high irradiation dose rate isotopes with long decay periods or high irradiation dose rate isotopes with short decay periods.

[0107] In some embodiments, the material of the Dewar embedment 20 includes stainless steel, wherein the stainless steel contains Co<0.2 wt % and Nb<0.05 wt %.

[0108] In related technologies, some fusion devices' dewar embedded parts do not take into account the stringent requirements for low magnetic permeability of the core area, and use carbon steel to manufacture the dewar embedded parts. The impact of carbon steel dewar embedded parts on the magnetic confinement state in ordinary areas may not be too serious, but if they are arranged in the core area, they will cause more serious interference.

[0109] It is understood that the Dewar embedment 20 described herein balances the requirements of low magnetic permeability and low levels of readily activating elements. Stainless steel is selected as the core material for the Dewar embedment 20, and the content of readily activating elements is controlled within a certain range. Specifically, the Dewar embedment 20 may be made of S30408 ​​stainless steel, with a composition requirement of Co < 0.2 wt% and Nb < 0.05 wt%. Before the raw materials are stored, each batch of stainless steel can be analyzed using a spectrometer, with a focus on the cobalt (Co) and niobium (Nb) content, to ensure that they meet these requirements. During production, advanced melting processes such as vacuum induction melting or vacuum arc remelting can be used to precisely control the raw material ratio. Composition changes can be monitored in real time during the melting process to prevent the influx of other impurities that may affect the cobalt (Co) and niobium (Nb) ratio. After the Dewar embedment blank 20a is formed, the Dewar embedment blank 20a is again sampled to confirm that the cobalt (Co) and niobium (Nb) contents still meet the standards, thus preventing composition fluctuations during production. In this way, through the selection of stainless steel materials, combined with the precise control of the content of cobalt (Co) and niobium (Nb), the performance defects of traditional carbon steel materials in the core area of ​​nuclear fusion are fundamentally solved. Stainless steel does not need to undergo complex demagnetization treatment like carbon steel, avoiding ineffective remediation of congenital defects in later processes. It not only ensures the stability of the magnetic field of the fusion device 1 and the high efficiency of the plasma reaction, but also reduces the probability of element activation to form high-irradiation dose isotopes, reduces radiation damage to workers, and reduces the risk of contamination with radioactive materials, thereby maximizing the stability and reliability of the fusion device 1 throughout its life cycle.

[0110] In some embodiments, as Figure 3-Figure 5 As shown, the Dewar embedded part 20 includes an embedded plate 21 and anchoring bars 22, the anchoring bars 22 are installed on the embedded plate 21, and a portion of the embedded plate 21 and the anchoring bars 22 are embedded in the cast-in-place concrete structure 30; before step 110, in which the Dewar embedded part blank 20a is subjected to at least one vacuum heat treatment, the processing method of the fusion device 1 further includes:

[0111] Cutting the initial material to obtain the anchor bar blank 22a, the auxiliary support structure 2 and a plurality of plates for forming the embedded plate blank 21a;

[0112] Welding and assembling multiple plates into a pre-embedded plate blank 21a, and performing surface leveling treatment on the pre-embedded plate blank 21a;

[0113] The auxiliary support structure 2 is detachably mounted on the embedded plate blank 21 a after leveling treatment, and the anchor bar blank 22 a is mounted on the embedded plate blank 21 a after leveling treatment to obtain the Dewar embedded part blank 20 a.

[0114] It should be noted that if Figure 3-Figure 5 As shown, the auxiliary support structure 2 is a temporary reinforcement structure during the manufacturing process of the Dewar embedded part 20. It is used to resist deformation during the processes of cutting, surface leveling, installation of anchor bars 22, heat treatment and physical correction, so as to improve the stability and reliability of the embedded plate 21 itself. After playing its temporary supporting function, the auxiliary support structure 2 can be removed from the embedded plate 21.

[0115] In actual implementation, before cutting, you can draw a cutting line and a check line in the initial material. The distance between the check line and the cutting line should be no less than 50mm. The cutting accuracy should be controlled within ±1mm. The anchor bar 22 can be fixed by a clamp and the sawing machine should be used for unified cutting. Before cutting, carefully check the material brand, certificate of conformity and actual specifications and dimensions, and mark and transplant them. After cutting, classify and store them, check and record them to avoid misuse or mixing of materials. Figure 3-Figure 5 As shown, the embedded plate 21 is designed to be special-shaped. Specifically, to meet the special assembly requirements of the tokamak components, the embedded plate 21 is configured to include a horizontal section 211, a vertical section 212, and an inclined section 213 connected in sequence. The angle between the horizontal section 211 and the vertical section 212 is 90°, and the angle between the vertical section 212 and the inclined section 213 is 118°. The welding process should first align and secure the horizontal section 211. Then, the vertical section 212 should be positioned above the horizontal section 211. After leveling and aligning, spot welding should be performed using E308 or E308MoL manual welding rods. Depending on the actual strength requirements, stiffening ribs can be optionally welded to the back of the vertical section 212 for reinforcement. Then, the inclined section 213 should be positioned above the vertical section 212. After leveling and aligning, spot welding should be performed using E308 or E308MoL manual welding rods to connect the inclined section 213 to the upper end of the vertical section 212. If welding of stiffening ribs is required in the previous steps, the upper ends of the stiffening ribs should also be spot-welded to the inclined section 213. During the welding process, ensure that the welding current, voltage, and welding speed strictly comply with the welding procedure specifications. Ensure that the ambient temperature, humidity, and wind speed meet the requirements of the welding procedure specifications. After welding is completed, the relevant operators will conduct a visual inspection and, as required, a surface inspection for liquid penetration of no less than 10%.

[0116] After the pre-embedded slab blank 21a is assembled and formed, a leveling machine is used to level the pre-embedded slab 21 to ensure surface flatness. The added thickness of the leveling machine should not exceed 2mm, and the flatness after leveling should not exceed 1mm. During the leveling process, care should be taken to control heat accumulation in the material to avoid deformation caused by concentrated thermal stress. To improve processing efficiency, the surface leveling process can be performed only on the target area of ​​the pre-embedded slab blank 21a. The target area is the area where the pre-embedded slab 21 will not contact the cast-in-place concrete structure 30.

[0117] After the leveling process, the auxiliary support structure 2 and the anchor bar blank 22a are assembled. In this way, interference with the leveling process caused by the obstruction of the auxiliary support structure 2 and the anchor bar 22 can be avoided, thereby reducing the operational difficulty of the leveling process.

[0118] For example, the embedded plate 21 can be made of stainless steel S30408, the design thickness can be no less than 28 mm, and the material thickness can be selected as 30.5 mm; the anchor bar 22 can be made of ribbed stainless steel S30408, and the diameter can be determined according to the tensile strength at different positions; the auxiliary support structure 2 can be made of 20 mm thick stainless steel S30408 ​​plate.

[0119] Among them, the anchoring bar 22 and the auxiliary support structure 2 can be provided in one or more forms, and the plurality of forms means two or more forms. Figure 5 As shown, a plurality of anchoring bars 22 are distributed at intervals on the lower surface of the embedded plate 21 , and a plurality of auxiliary support structures 2 are distributed at intervals along the length direction of the embedded plate 21 on the lower surface of the embedded plate 21 .

[0120] The processing method of the fusion device 1 provided in the embodiment of the present application, through the design of the above-mentioned blank preparation steps, welding assembly and surface leveling treatment, ensures that the embedded plate blank 21a has good flatness and structural strength, providing a stable foundation for the installation of the anchor bar blank 22a and the auxiliary support structure 2. The overall structure of the Dewar embedded part blank 20a is stable and not easily deformed during subsequent processing and use. At the same time, the initial leveling reduces the difficulty of subsequent physical correction and optimizes the correction effect, thereby improving the control accuracy of the surface flatness of the Dewar embedded part 20. At the same time, the detachable auxiliary support structure 2 provides temporary reinforcement for the blank before heat treatment, effectively alleviating secondary deformation caused by insufficient strength of the blank itself or subsequent processing stress, thereby improving the yield rate.

[0121] In some embodiments, as Figure 5 As shown, after the embedded plate blank 21a is subjected to surface leveling treatment and before the Dewar embedded part blank 20a is subjected to at least one vacuum heat treatment, the processing method of the fusion device 1 further includes:

[0122] The surface of the embedded plate blank 21a is preliminarily ground and polished.

[0123] In actual implementation, the operator can use an angle grinder, sanding belt, or sandpaper to perform preliminary grinding and polishing on the surface of the embedded slab 21a. This light grinding optimizes the surface condition of the embedded slab 21a, reduces minor burrs, weld excess height, or processing marks that may remain after leveling, and provides a cleaner and more uniform surface foundation for subsequent vacuum heat treatment and other processes (such as pickling and passivation). To improve processing efficiency, surface leveling can be performed only on the target area of ​​the embedded slab 21a. The target area is the area where the embedded slab 21 will be formed and will not contact the cast-in-place concrete structure 30. After the preliminary grinding and polishing is completed, the operator can use a roughness tester to test the surface roughness of the embedded slab 21a to ensure that it meets the expected standards for preliminary grinding and polishing. The operator can also visually and tactilely inspect the surface to confirm that there are no obvious scratches, pits, burrs, or other defects.

[0124] The processing method of the fusion device 1 provided in the embodiment of the present application, through the above-mentioned preliminary grinding and polishing step design before heat treatment, on the one hand, reduces the surface defects of the embedded plate blank 21a in advance, reduces the risk of local stress concentration caused by surface defects during vacuum heat treatment, thereby reducing the risk of blank deformation and cracking, ensuring the structural integrity of the blank, making subsequent heat treatment more uniform and stable, and effectively improving the magnetic permeability optimization effect. On the other hand, the surface after preliminary grinding and polishing is flatter and smoother, reducing the amount of material to be removed in the subsequent overall grinding and polishing process, shortening the processing time; at the same time, a good surface foundation helps subsequent cleaning, anti-corrosion, physical correction and other processes to better perform their functions, improving the processing quality and efficiency of each link.

[0125] In some embodiments, as Figure 5 As shown, the auxiliary support structure 2 is detachably mounted on the embedded plate blank 21a after leveling, and the anchor bar blank 22a is mounted on the embedded plate blank 21a after leveling, to obtain the Dewar embedded part blank 20a, including:

[0126] Install the auxiliary support structure 2 on the embedded slab blank 21a through a detachable connector;

[0127] Weld the anchor bar blank 22a to the surface of the embedded plate blank 21a; alternatively, weld a sleeve with an inner thread interface on the surface of the embedded plate blank 21a, and tighten the outer thread of the anchor bar blank 22a to the inner thread interface of the sleeve;

[0128] Furthermore, before performing cleaning, anti-corrosion treatment and physical correction treatment on the surface of the heat-treated Dewar embedded part blank 20a, the processing method further includes:

[0129] The detachable connection piece is disassembled to remove the auxiliary support structure 2 from the embedded slab blank 21a.

[0130] Among them, the detachable connecting parts may include but are not limited to clamps, pads, bolts or buckles, etc., and the embodiments of the present application are not limited to this.

[0131] The removable auxiliary support structure 2 provides reliable support during the blank processing, facilitating handling and flipping operations, and preventing blank deformation. By using convenient detachable connectors, the auxiliary support structure 2 can be quickly installed and removed from the pre-embedded plate blank 21a, adapting to the needs of different processing stages and improving processing efficiency. Removing the auxiliary support structure 2 at the appropriate time prevents it from hindering cleaning, anti-corrosion treatment, and physical correction treatment, ensuring that the surface treatment process can fully and evenly affect the surface of the Dewar embedded part blank 20a.

[0132] In some embodiments, when the anchor bar blank 22a is directly welded to the surface of the embedded slab blank 21a, the surface of the embedded slab blank 21a that is subsequently exposed to the cast-in-place concrete structure 30 is padded for protection. This can simultaneously protect the anti-corrosion layer and flatness of the upper surface of the embedded slab 21, thereby ensuring that the performance of the Dewar embedded component 20 is not affected. The embedded slab blank 21a is then flipped over to the surface of the portion that is subsequently embedded in the cast-in-place concrete structure 30. The installation position of the anchor bar 22 is marked according to the drawings. The marking should include the central axis and outer contour of the steel bar installation. The anchor bar 22 is directly welded using a semi-penetration welding process and E308 or E308MoL manual welding rods. During the welding of the anchor bar 22, attention should be paid to controlling the verticality and position deviation. The position deviation is required to be no greater than ±2mm, and the verticality is required to be no greater than 5°.

[0133] In other embodiments, when the anchor bar blank 22a is connected to the embedded slab blank 21a via a sleeve, the welding process for the sleeve on the surface of the portion of the embedded slab blank 21a that will subsequently be embedded in the cast-in-place concrete structure 30 can be similar to the welding process for directly welding the anchor bar 22 described above and will not be repeated here. The anchor bar 22 connected via the sleeve is machined with an external thread that mates with the internal thread interface of the sleeve, and then the external thread of the anchor bar 22 is tightened to the internal thread interface of the sleeve using a tool.

[0134] By welding or threading the anchor bar blank 22a, a firm connection is formed between the dewar embedded part 20 and the cast-in-place concrete structure 30, effectively transferring the load, so that the dewar embedded part 20 can stably support the tokamak components during the operation of the fusion device 1, reducing the risk of structural failure caused by loose connections.

[0135] In some embodiments, as Figure 4 and Figure 5 As shown, the embedded plate 21 is provided with a vibrating hole 201; step 150, pouring concrete at the installation position of the Dewar embedded part 20, including:

[0136] Before pouring concrete, the surface of the embedded plate 21 that does not contact the cast-in-place concrete structure 30 is protected;

[0137] During the concrete pouring process, a vibrator is passed through the vibrating hole 201 to vibrate the lower layer of concrete.

[0138] The shape of the vibrating hole 201 can be designed to be circular or square, and the specific size is determined according to the model of the vibrator so that the vibrator can pass through smoothly.

[0139] For example, Figure 4 and Figure 5 As shown, the tamping hole 201 is designed to be circular.

[0140] The hole layout can be evenly distributed in a plum blossom shape or a matrix shape to ensure uniform concrete vibration.

[0141] The surface of the embedded plate 21 that does not contact the cast-in-place concrete structure 30 can be protected by a liner, a plastic film, or a combination of the two, which is not limited in this embodiment of the present application.

[0142] In actual implementation, a layered pouring method can be used when pouring concrete. The time interval between the pouring of two adjacent layers should be controlled before the initial setting of the concrete to ensure close bonding between the layers. A concrete delivery pump should be used to deliver the concrete to the pouring site to avoid concrete segregation. The vibrator is vertically inserted into the vibration hole 201 and slowly inserted into the lower layer of concrete. The vibrator is turned on for vibration. The vibration time is strictly controlled to ensure that the concrete surface no longer sinks significantly, no bubbles appear, and the surface is no longer slurry. During the vibration process, the vibrator should be prevented from colliding with the embedded plate 21 and the anchor bar 22 to prevent the overall displacement of the Dewar embedded part 20. After the vibration is completed, the vibrator is slowly pulled out to fill the sunken part of the concrete around the vibration hole 201 in time. After the concrete solidifies to form a cast-in-place concrete structure 30, it can be checked by knocking or other methods to see if there are hollows inside.

[0143] The processing method of the fusion device 1 provided in the embodiment of the present application, through the setting of the above-mentioned vibrating hole 201, enables the vibrator to penetrate deep into the lower layer of concrete, effectively exhaust air, reduce cavities and honeycomb surfaces, improve the density and strength of the concrete, enhance the bonding force between the dewar embedded part 20 and the cast-in-place concrete structure 30, so that the dewar embedded part 20 can stably bear the load of the tokamak component during the operation of the fusion device 1. Combined with the surface protection measures before pouring, the concrete slurry is prevented from contaminating the upper surface of the embedded plate 21, the anti-corrosion layer is prevented from being damaged and the surface accuracy is reduced, the low magnetic permeability characteristics and anti-corrosion performance of the embedded plate 21 are maintained, the magnetic property changes and corrosion risks caused by surface damage are reduced, and the long-term reliability of the dewar embedded part 20 is guaranteed. In addition, since the upper surface of the embedded plate 21 is effectively protected, after the concrete pouring is completed, only the protective material needs to be removed, and there is no need for a large amount of surface cleaning work, which saves manpower and time costs, improves construction efficiency, and avoids secondary damage to the surface of the embedded plate 21 due to improper cleaning.

[0144] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0145] In the description of this application, 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" 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 this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0146] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0147] In the description of this application, “plurality” means two or more.

[0148] In the description of the present application, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features being in contact with each other not directly but via another feature therebetween.

[0149] In the description of this application, a first feature “on”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0150] Other structures of ... according to the embodiments of the present application, such as ... and ..., and operations are known to ordinary technicians in this field and will not be described in detail here.

[0151] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0152] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A method for processing a fusion device, characterized in that: The fusion device includes a biological shielding wall, a tokamak component, and a dewar embedded part. The biological shielding wall is provided with a window for installing the dewar embedded part, and the dewar embedded part is used to fix the tokamak component. The processing method includes: Performing vacuum heat treatment on the Dewar embedded part blank at least once; Performing cleaning, anti-corrosion treatment and physical correction treatment on the surface of the Dewar embedded part blank after heat treatment; Grinding and polishing the surface of the Dewar embedded part blank after the cleaning, anti-corrosion and physical correction treatments to obtain the Dewar embedded part; transporting the Dewar embedded component to the installation position of the window to be installed, and temporarily fixing the Dewar embedded component at the installation position; Concrete is poured at the installation position of the Dewar embedded part; After the concrete solidifies, a cast-in-place concrete structure is formed in the area below the Dewar embedded component, and a portion of the Dewar embedded component is embedded in the cast-in-place concrete structure.

2. The method for processing a fusion device according to claim 1, characterized in that: The method of performing at least one vacuum heat treatment on the Dewar embedded part blank comprises: The Dewar embedded part blank is temporarily fixed and sent to an annealing furnace for vacuum heat treatment at least once, and the magnetic permeability of the Dewar embedded part blank is tested after each heat treatment until the relative magnetic permeability of the Dewar embedded part blank is no more than 1.

2.

3. The method for processing a fusion device according to claim 1, characterized in that: The surface of the heat-treated Dewar embedded part blank is cleaned, anti-corroded and physically corrected, including: Temporarily fixing the Dewar embedded part blank, pickling the Dewar embedded part blank to clean the pollutants on the surface of the Dewar embedded part and forming a passivation film for corrosion protection on the surface of the Dewar embedded part blank, wherein the pickling time is greater than or equal to 30 minutes and less than or equal to 60 minutes; The pickled Dewar embedded part blank is temporarily fixed, and the surface of the Dewar embedded part blank is flattened until the flatness of the Dewar embedded part blank is no greater than 1 mm.

4. The method for processing a fusion device according to claim 3, characterized in that: After pickling the Dewar embedded part blank, the method further comprises: The acid solution remaining on the surface of the Dewar embedded part blank is cleaned, and the pH value of the liquid after each cleaning is tested until the pH value of the liquid after the last cleaning is 6-8.

5. The method for processing a fusion device according to claim 1, characterized in that: The surface of the Dewar embedded part blank after the cleaning, anti-corrosion and physical correction treatment is subjected to grinding and polishing to obtain the Dewar embedded part, comprising: The Dewar embedded part blank after cleaning, anti-corrosion treatment and physical correction treatment is temporarily fixed, and the surface of the Dewar embedded part blank is ground and polished using various types of sandpaper until the surface roughness of the Dewar embedded part is no more than 3.2 μm.

6. The method for processing a fusion device according to claim 1, characterized in that: The material of the Dewar embedded part includes stainless steel, wherein the stainless steel contains Co<0.2wt% and Nb<0.05wt%.

7. The method for processing a fusion device according to any one of claims 1 to 6, characterized in that: The Dewar embedded part includes an embedded plate and anchor bars, the anchor bars are installed on the embedded plate, a portion of the embedded plate and the anchor bars are embedded in the cast-in-place concrete structure; before the Dewar embedded part blank is subjected to at least one vacuum heat treatment, the method further includes: Cutting the initial material to obtain an anchor bar blank, an auxiliary support structure, and a plurality of plates for forming an embedded slab blank; Welding and assembling the plurality of plates into the embedded plate blank, and performing surface leveling treatment on the embedded plate blank; The auxiliary support structure is detachably mounted on the embedded plate blank after leveling treatment, and the anchor bar blank is mounted on the embedded plate blank after leveling treatment to obtain the Dewar embedded part blank.

8. The method for processing a fusion device according to claim 7, characterized in that: After performing surface leveling treatment on the embedded plate blank and before performing at least one vacuum heat treatment on the Dewar embedded part blank, the method further includes: The surface of the embedded slab body is preliminarily ground and polished.

9. The method for processing a fusion device according to claim 7, characterized in that: The auxiliary support structure is detachably mounted on the embedded plate blank after leveling, and the anchor bar blank is mounted on the embedded plate blank after leveling to obtain the Dewar embedded part blank, including: Installing the auxiliary support structure on the embedded slab body through a detachable connector; Welding the anchor bar blank to the surface of the embedded plate blank; or welding a sleeve with an inner thread interface to the surface of the embedded plate blank, and tightening the outer thread of the anchor bar blank to the inner thread interface of the sleeve; Furthermore, before performing cleaning, anti-corrosion treatment and physical correction treatment on the surface of the heat-treated Dewar embedded part blank, the processing method further comprises: The detachable connecting piece is disassembled to remove the auxiliary supporting structure from the embedded slab blank.

10. The method for processing a fusion device according to claim 7, characterized in that: The embedded plate is provided with a vibrating hole; the concrete pouring at the installation position of the Dewar embedded part comprises: Before pouring concrete, protecting the surface of the portion of the embedded plate that does not contact the cast-in-place concrete structure; During the concrete pouring process, a vibrator is passed through the vibrating hole to vibrate the lower layer of concrete.

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