Method for arranging measuring points in reactor pressure vessel, network equipment and readable medium

Abstract

The invention provides a reactor pressure vessel internal measuring point arrangement method, network equipment and a readable medium. The method comprises the steps of obtaining geometric parameters of a reactor pressure vessel, and establishing a three-dimensional model of the pressure vessel according to the geometric parameters; extracting a coolant flow channel in the three-dimensional model by using three-dimensional software to obtain a fluid domain; carrying out grid division on the fluid domain by adopting CFD software; setting a turbulence model and a boundary condition, and estimating the overall flow field distribution of the reactor by CFD software according to the turbulence model and the boundary condition; the positions of the measuring points are arranged according to the overall flow field distribution of the reactor. The method comprises the following steps: establishing a three-dimensional model which is equal to a test reactor or a prototype reactor in proportion, and carrying out numerical simulation calculation on a fluid domain in the reactor pressure vessel by adopting a fluid mechanics calculation mode to obtain the distribution of physical quantities such as pressure and temperature in all areas of a flow channel in the reactor pressure vessel; and the specific measurement positions of the temperature sensor and the pressure sensor can be conveniently determined.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of nuclear power reactors, and in particular to a method for arranging measuring points inside a reactor pressure vessel, a network device and a readable medium. Background Art

[0002] In the process of designing and developing nuclear power plants, it is necessary to test whether the design parameters of the nuclear power plant meet the design requirements and whether the relevant special facilities meet the safety requirements. For small reactors with natural circulation, the power used to cool the reactor comes from the density difference of the coolant, and the density difference is caused by the temperature difference, while the resistance to the flow of the coolant mainly comes from the shape resistance of the components inside the reactor and the flow resistance along the way. In order to judge the natural circulation capacity inside the small reactor, it is necessary to know the distribution of temperature, pressure, flow rate and other physical quantities in various places inside the reactor. Therefore, it is particularly important to accurately measure the temperature and pressure and other related parameters inside the reactor.

[0003] Since there are not many small natural circulation reactors built and put into operation in the world, there is still a lack of relevant experience in the arrangement of measuring points. Too many side points will lead to too many holes on the outer surface of the pressure vessel, which is not conducive to the integrity of the pressure vessel. At the same time, too many measuring points will also interfere with the original flow field due to the insertion of sensors in the flow channel. If the number of side points is too small or the side points are not properly arranged, it will be difficult to judge the natural circulation state inside the pressure vessel, and the information of physical quantities in key parts will be lost. Therefore, before the test, it is necessary to roughly estimate the thermal and hydraulic parameters inside the pressure vessel to provide relevant guidance for the correct arrangement of side points. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for arranging measuring points inside a reactor pressure vessel, a network device and a readable medium, so as to solve the problem of the current lack of a method for arranging measuring points in a small reactor with natural circulation.

[0005] To solve the above technical problems, the present invention provides a method for arranging measuring points inside a reactor pressure vessel, comprising: obtaining geometric parameters of the reactor pressure vessel, and establishing a three-dimensional model of the pressure vessel according to the geometric parameters; extracting coolant flow channels in the three-dimensional model using three-dimensional software to obtain a fluid domain; using CFD software to grid the fluid domain; setting a turbulence model and boundary conditions, the CFD software predicting the flow field distribution of the entire reactor according to the turbulence model and the boundary conditions; and arranging the positions of the measuring points according to the flow field distribution of the entire reactor.

[0006] Optionally, the CFD software estimates the flow field distribution of the entire reactor based on the turbulence model and the boundary conditions, including: setting a number of monitoring points inside the fluid domain through the CFD software, inputting the boundary conditions into the turbulence model, and the turbulence model iteratively calculating the flow field of each monitoring point, and after the calculation results converge, obtaining the estimated flow field distribution of the entire reactor.

[0007] Optionally, the boundary conditions include: temperature and pressure in an initial state.

[0008] Optionally, the flow field distribution of the entire reactor includes temperature distribution and pressure distribution.

[0009] Optionally, arranging the positions of measuring points according to the overall flow field distribution of the reactor includes: setting a first number of measuring points in an area where the temperature change is greater than a preset temperature change threshold and the pressure change is greater than a preset pressure change threshold; setting a second number of measuring points in an area where the temperature change is less than or equal to the preset temperature change threshold or the pressure change is less than or equal to the preset pressure change threshold; wherein the first number is greater than the second number.

[0010] Optionally, the method further includes verifying the independence of the divided grids; verifying the independence of the divided grids includes: dividing the fluid domain into a number of different numbers of grids, and performing calculations using different numbers of grids until the calculation results do not increase with the increase in the number of grids.

[0011] Optionally, setting the turbulence model includes: modifying different types of turbulence models to ensure that the calculation result of the final set turbulence model is convergent and the error between the final working condition of the calculation result and the result of theoretical calculation is minimized.

[0012] Optionally, it also includes checking the integrity and validity of the grid.

[0013] To solve the above technical problems, the present invention provides a network device, comprising: a memory, used to store instructions executable by a processor; and a processor, used to execute the instructions to implement any of the methods described above.

[0014] In order to solve the above technical problems, the present invention provides a computer-readable medium storing computer program codes, and the computer program codes implement any of the above methods when executed by a processor.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The method for arranging measuring points inside a reactor pressure vessel of the present invention establishes a three-dimensional model of the same proportion as the test reactor or the prototype reactor, and uses a fluid mechanics calculation method to perform numerical simulation calculations on the fluid domain inside the reactor pressure vessel, thereby obtaining the distribution of physical quantities such as pressure and temperature in all regions of the flow channel inside the reactor pressure vessel. It can also accurately locate the areas where the pressure field and temperature field change dramatically and the key areas. This method can easily determine the specific measurement positions of the temperature sensor and the pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are included to provide a further understanding of the present application. They are included and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present application and together with the present specification serve to explain the principles of the present application. In the accompanying drawings:

[0018] Figure 1 The present invention is a flowchart of a method for arranging measuring points inside a reactor pressure vessel according to an embodiment of the present invention.

[0019] Figure 2 The flowchart of performing independence verification on divided grids according to an embodiment of the present invention.

[0020] Figure 3 It is a flow chart of the CFD software predicting the temperature distribution according to the turbulence model and the boundary conditions.

[0021] Figure 4 It is a flow chart of the CFD software predicting the pressure distribution according to the turbulence model and the boundary conditions.

[0022] Figure 5 It is a system block diagram of a network device according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0024] The reactor of the present application is for a small natural circulation reactor. Natural circulation refers to a circulation in a closed loop, without the action of an external driving force, which is generated by the density difference between the cold and hot sections of the loop and the height difference between the cold and hot source centers.

[0025] The pressure vessel is the pressure boundary of the reactor as the reactor coolant and is the second safety barrier to prevent the leakage of radioactive materials. The reactor pressure vessel is equipped with fuel assemblies, main heat exchangers, in-core components, and built-in control rod drive mechanisms. The fuel assembly is located at the bottom of the pressure vessel, and the main heat exchanger is arranged in the annular space between the upper cylinder of the pressure vessel and the surrounding cylinder of the in-core component basket. There is a certain gas space above the liquid level in the upper part of the pressure vessel, and the operating pressure of the reactor coolant system is composed of the partial pressure of water vapor and the partial pressure of nitrogen.

[0026] Since there are not many natural circulation small reactors currently built and put into operation in the world, there is still a lack of relevant experience in the arrangement of measuring points. In order to solve the above problems, the present invention provides a method for arranging measuring points inside a reactor pressure vessel. This method aims at the problem that there are no related methods for arranging points on the side of small reactors at present. Computational Fluid Dynamics (CFD) and reactor thermal hydraulic simulation software are used to simulate the operation of the reactor, calculate the temperature and pressure of each different area, find the key temperature measuring points and pressure measuring points, and determine the best arrangement position.

[0027] Figure 1 FIG. 1 is a flow chart of a method for arranging measuring points inside a reactor pressure vessel according to an embodiment of the present invention. Figure 1 As shown, the method 100 for arranging measuring points inside a reactor pressure vessel comprises the following steps:

[0028] Step S11: Acquire geometric parameters of the reactor pressure vessel, and establish a three-dimensional model of the pressure vessel according to the geometric parameters.

[0029] Step S12: Use 3D software to extract the coolant flow channel in the 3D model to obtain the fluid domain.

[0030] The 3D software includes but is not limited to the DesignModeler module and the Space Claim module. Taking the DesignModeler module as an example, extracting the flow channel includes: entering the DesignModeler module, and entering the flow channel extraction command through the menu Tools-Fill. Select the inner surface of the flow channel in Faces, and click General to generate the flow channel.

[0031] Step S13: Using CFD software to divide the fluid domain into grids.

[0032] Enter the Meshing module, select Mesh, and set Physics Preference to CFD in Defaults to perform specialized fluid meshing. You can also set parameters such as the solver used and mesh size below.

[0033] Optionally, after CFD generates the mesh, it is necessary to check the integrity and validity of the mesh, which can be done through mesh checking on CFD.

[0034] Optionally, the method further includes step S14: performing independence verification on the divided grids.

[0035] Figure 2 FIG. 1 is a flow chart of performing independence verification on divided grids according to an embodiment of the present invention. Figure 2 As shown, the independence verification of the divided grid includes:

[0036] Step S141: Divide the fluid domain into a number of different grid numbers.

[0037] Step S142: Calculate using different numbers of grids until the calculation result does not increase with the increase of the number of grids.

[0038] In some embodiments, the fluid domain is divided into 5 million, 8 million, and 10 million grids, respectively. 5 million, 8 million, and 10 million grids are used to perform numerical calculations under exactly the same working conditions, and grid independence verification is achieved by analyzing the calculation results. With an inlet velocity of 1.5 m / s and other conditions unchanged, the fluid velocity distribution and wall shear stress distribution of the corresponding working conditions are calculated. After analysis, it can be seen that when the number of grids is above 8 million, the calculation results are no longer related to the number of grids, so 8 million grids are selected for numerical simulation calculations, which does not affect the accuracy of the calculation results and can save computing resources and reduce computing costs.

[0039] Step S15: Setting the turbulence model and boundary conditions. The CFD software estimates the flow field distribution of the entire reactor based on the turbulence model and boundary conditions.

[0040] Turbulence is an irregular, multi-scale, structured flow, which is generally three-dimensional, unsteady, and has strong diffusivity and dissipation. From a physical structure point of view, turbulence is a flow composed of vortices with rotating structures of various scales. The size of these vortices and the direction of the rotation axis are randomly distributed. The turbulence model is a differential equation type.

[0041] Optionally, setting the turbulence model includes:

[0042] Modify different types of turbulence models to ensure that the calculation results of the final set turbulence model are converged and the final working conditions of the calculation results are similar to the results of theoretical calculations.

[0043] Types of turbulence models include, but are not limited to, the standard k-ω model, the BSL k-ω model, the SST k-ω model, and the Reynolds stress model (RSM). The standard k-ω model is an empirical model based on the model transport equation of turbulent kinetic energy (k) and specific dissipation rate (ω). Compared to the standard K-ω model, the SST k-ω model includes all the improvements of the BSL k-ω model, and in addition considers the transmission of turbulent shear stress in the definition of turbulent viscosity. It can be said that the SST model is more accurate and reliable than the standard model and the BSL model, and is applicable to a wider range of flow states.

[0044] 8 million grids are selected for numerical simulation calculations, and the standard k-ω model, BSL k-ω model, SST k-ω model and Reynolds stress model (RSM) are used to perform numerical simulation calculations at the corresponding working conditions of inlet velocity 0.5, 1, 1.5, and 2 m / s. Compare the friction resistance coefficients of different turbulence models with the theoretical values ​​calculated by the preset formula. Upon analysis, the friction resistance coefficient calculated by the SST k-ω model is convergent and the final working condition of the calculation result has the smallest error with the result of the theoretical calculation. In other words, the SST k-ω model is the most reasonable and accurate for the numerical simulation of sub-channel turbulent flow, so the SST k-ω model is selected as the turbulence model for the numerical simulation of this application.

[0045] Optionally, the boundary conditions include: temperature and pressure in the initial state.

[0046] Optionally, the flow field distribution of the entire reactor includes temperature distribution and pressure distribution.

[0047] Figure 3 This is a flow chart of how CFD software estimates the temperature distribution based on the turbulence model and boundary conditions. Figure 3 As shown, the CFD software estimates the temperature distribution based on the turbulence model and boundary conditions, including:

[0048] Step S31: setting a number of monitoring points inside the fluid domain by using CFD software;

[0049] Step S32: input the temperature in the initial state into the turbulence model, and the turbulence model iteratively calculates the temperature of each monitoring point;

[0050] Step S33: After the temperature calculation results of each monitoring point converge, the estimated temperature distribution is obtained.

[0051] Figure 4 This is a flow chart of how CFD software estimates the pressure distribution based on the turbulence model and boundary conditions. Figure 4 As shown, the CFD software estimates the pressure distribution based on the turbulence model and boundary conditions, including:

[0052] Step S41: setting a number of monitoring points inside the fluid domain by using CFD software;

[0053] Step S42: inputting the pressure in the initial state into the turbulence model, and the turbulence model iteratively calculates the pressure at each monitoring point;

[0054] Step S43: After the pressure calculation results of each monitoring point converge, the estimated pressure distribution is obtained.

[0055] Step S16: Arrange the positions of the measuring points according to the overall flow field distribution of the reactor.

[0056] In some embodiments, a first number of measuring points are set in an area where the temperature change is greater than a preset temperature change threshold and the pressure change is greater than a preset pressure change threshold; a second number of measuring points are set in an area where the temperature change is less than or equal to the preset temperature change threshold or the pressure change is less than or equal to the preset pressure change threshold; wherein the first number is greater than the second number. In short, if there are areas with large temperature changes and areas with large pressure changes, the arrangement of temperature and pressure measuring points should be increased. On the contrary, in areas where the changes are not drastic, it is possible to choose to reduce the arrangement of measuring points.

[0057] The method for arranging measuring points inside a reactor pressure vessel of the present invention uses a fluid mechanics calculation method to perform numerical simulation calculations on the fluid domain inside the reactor pressure vessel, and obtains the distribution of physical quantities such as pressure and temperature in all regions of the flow channel inside the reactor pressure vessel. It can also accurately locate the areas where the pressure field and temperature field change dramatically and the key areas. This method can easily determine the specific measurement positions of the temperature sensor and the pressure sensor.

[0058] Flowcharts are used in the present application to illustrate the operations performed by the system according to the embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed accurately in order. On the contrary, various steps may be processed in reverse order or simultaneously. At the same time, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0059] Figure 5 is a system block diagram of a network device according to an embodiment of the present application. Figure 5As shown, the network device 500 may include an internal communication bus 501, a processor 502, a read-only memory (ROM) 503, a random access memory (RAM) 504, and a communication port 505. When applied to a personal computer, the network device 500 may also include a hard disk 506. The internal communication bus 501 can realize data communication between the components of the network device 500. The processor 502 can make judgments and issue prompts. In some embodiments, the processor 502 can be composed of one or more processors. The communication port 505 can realize data communication between the network device 500 and the outside. In some embodiments, the network device 500 can send and receive information and data from the network through the communication port 505. The network device 500 may also include different forms of program storage units and data storage units, such as a hard disk 506, a read-only memory (ROM) 503 and a random access memory (RAM) 504, which can store various data files used for computer processing and / or communication, and possible program instructions executed by the processor 502. The processor executes these instructions to implement the main part of the method. The processing result of the processor is transmitted to the user device through the communication port and displayed on the user interface.

[0060] The above-mentioned operation method can be implemented as a computer program, stored in the hard disk 506, and loaded into the processor 502 for execution, so as to implement the method for arranging measuring points inside the reactor pressure vessel of the present application.

[0061] The present application also includes a computer-readable medium storing a computer program code, which, when executed by a processor, implements the above-mentioned method for arranging measuring points inside a reactor pressure vessel.

[0062] When the method for arranging measuring points inside a reactor pressure vessel is implemented as a computer program, it can also be stored in a computer-readable storage medium as a product. For example, a computer-readable storage medium may include, but is not limited to, a magnetic storage device (e.g., a hard disk, a floppy disk, a magnetic strip), an optical disk (e.g., a compact disk (CD), a digital versatile disk (DVD)), a smart card, and a flash memory device (e.g., an electrically erasable programmable read-only memory (EPROM), a card, a stick, a key drive). In addition, the various storage media described herein can represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media (and / or storage media) that can store, contain and / or carry code and / or instructions and / or data.

[0063] Some aspects of the present application may be performed entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. The above hardware or software may be referred to as "data blocks", "modules", "engines", "units", "components" or "systems". The processor may be one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DAPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, or combinations thereof. In addition, various aspects of the present application may be expressed as computer products located in one or more computer-readable media, which include computer-readable program codes. For example, computer-readable media may include, but are not limited to, magnetic storage devices (e.g., hard disks, floppy disks, tapes ...), optical disks (e.g., compact disks CDs, digital versatile disks DVDs ...), smart cards, and flash memory devices (e.g., cards, sticks, key drives ...).

[0064] A computer-readable medium may include a propagated data signal containing computer program code, such as in baseband or as part of a carrier wave. The propagated signal may have a variety of manifestations, including electromagnetic, optical, etc., or a suitable combination. A computer-readable medium may be any computer-readable medium other than a computer-readable storage medium, which may be connected to an instruction execution system, device or apparatus to communicate, propagate or transmit a program for use. The program code on the computer-readable medium may be propagated via any suitable medium, including radio, cable, fiber optic cable, radio frequency signal, or similar medium, or any combination of the above mediums.

[0065] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more embodiments of the invention, in the above description of the embodiments of the present application, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the subject of the present application requires more features than the features mentioned. In fact, the features of the embodiment are less than all the features of the single embodiment disclosed above.

[0066] The basic concepts have been described above. Obviously, for those skilled in the art, the above invention disclosure is only used as an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0067] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0068] As shown in this application, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0069] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0070] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0071] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0072] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0073] It should be understood that when a component is referred to as being "on another component," "connected to another component," "coupled to another component," or "contacting another component," it may be directly on, connected to, coupled to, or contacting the other component, or there may be intervening components. In contrast, when a component is referred to as being "directly on another component," "directly connected to," "directly coupled to," or "directly contacting" another component, there are no intervening components. Similarly, when a first component is referred to as being "electrically in contact with" or "electrically coupled to" a second component, there is an electrical path between the first component and the second component that allows current to flow. The electrical path may include capacitors, coupled inductors, and / or other components that allow current to flow, even without direct contact between conductive components.

[0074] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining the digits. Although the numerical domains and parameters used to confirm the breadth of the range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0075] Although the present application has been described with reference to the current specific embodiments, ordinary technicians in this technical field should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions may be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the essential spirit of the present application, they will fall within the scope of the present application.

Claims

1. A method for arranging measuring points inside a reactor pressure vessel, characterized in that: include: Acquiring geometric parameters of the reactor pressure vessel, and establishing a three-dimensional model of the pressure vessel according to the geometric parameters; Extract the coolant flow channel in the three-dimensional model using three-dimensional software to obtain a fluid domain; Using CFD software to divide the fluid domain into grids; Setting a turbulence model and boundary conditions, wherein the CFD software estimates the flow field distribution of the entire reactor according to the turbulence model and the boundary conditions; The positions of the measuring points are arranged according to the flow field distribution of the entire reactor.

2. The method for arranging measuring points inside a reactor pressure vessel according to claim 1, characterized in that: The CFD software estimates the overall flow field distribution of the reactor based on the turbulence model and the boundary conditions, including: A number of monitoring points are set inside the fluid domain through the CFD software, and the boundary conditions are input into the turbulence model. The turbulence model iteratively calculates the flow field of each monitoring point, and after the calculation results converge, the estimated flow field distribution of the entire reactor is obtained.

3. The method for arranging measuring points inside a reactor pressure vessel according to claim 2, characterized in that: The boundary conditions include: temperature and pressure in the initial state.

4. The method for arranging measuring points inside a reactor pressure vessel according to claim 3, characterized in that: The flow field distribution of the entire reactor includes temperature distribution and pressure distribution.

5. The method for arranging measuring points inside a reactor pressure vessel according to claim 4, characterized in that: Arranging the positions of the measuring points according to the overall flow field distribution of the reactor includes: Setting a first number of measuring points in an area where the temperature change is greater than a preset temperature change threshold and the pressure change is greater than a preset pressure change threshold; Setting a second number of measuring points in an area where the temperature change is less than or equal to a preset temperature change threshold or the pressure change is less than or equal to a preset pressure change threshold; Wherein, the first number is greater than the second number.

6. The method for arranging measuring points inside a reactor pressure vessel according to claim 1, characterized in that: It also includes the verification of independence of the divided grid; Verifying the independence of the divided grids includes: dividing the fluid domain into a number of different numbers of grids, and performing calculations using different numbers of grids until the calculation results do not increase with the increase of the number of grids.

7. The method for arranging measuring points inside a reactor pressure vessel according to claim 1, characterized in that: Setting the turbulence model includes: Modify different types of turbulence models to ensure that the calculation results of the final set turbulence model are converged and the error between the final working condition of the calculation results and the results of theoretical calculations is minimized.

8. The method for arranging measuring points inside a reactor pressure vessel according to claim 1, characterized in that: It also includes checking the integrity and validity of the grid.

9. A network device, characterized in that: include: a memory for storing instructions executable by a processor; A processor, configured to execute the instructions to implement the method according to any one of claims 1 to 8.

10. A computer readable medium storing computer program code, wherein the computer program code implements the method according to any one of claims 1 to 8 when executed by a processor.

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