Anti-hooking performance analysis method and device for grillwork of pressurized water reactor fuel assembly and medium

Abstract

The invention provides an anti-hooking performance analysis method and equipment for a grillwork of a pressurized water reactor fuel assembly and a medium, and relates to the technical field of nuclear reactors. According to the three-dimensional model of the guide wing of the grillwork and the transverse maximum interference distance between the adjacent grillworks in the lifting process of the fuel assembly, the hooking simulation analysis of the fuel assembly grillwork is realized by utilizing finite element analysis software, the hooking prevention performance of the grillwork can be preliminarily predicted, the situation that unreasonable grillwork design is transmitted to the next stage is avoided, and the hooking prevention performance of the fuel assembly grillwork is improved. Waste of time, manpower, material resources and financial resources is reduced, and the design efficiency of the fuel assembly grillwork is improved.

Description

Technical Field

[0001] This application relates to the field of nuclear reactor technology, and in particular to a method, equipment and medium for analyzing the anti-snagging performance of the grid of a pressurized water reactor fuel assembly. Background Technology

[0002] Fuel assemblies are critical components of the reactor core in pressurized water reactor nuclear power plants. During operation and hoisting, it is essential to prevent fuel assemblies from snagging and causing damage to adjacent assemblies, in-core components, or hoisting equipment. The fuel assembly grid, as a vital component of the fuel assembly framework, should possess excellent anti-snagging properties to avoid adversely affecting the safety and economics of the nuclear power plant.

[0003] To confirm the anti-snagging performance of the grid, tests are conducted to verify its anti-snagging performance. Currently, before conducting tests to verify the anti-snagging performance of the grid, it is necessary to complete the manufacturing of a test piece of the grid or a fuel assembly containing the grid. If the anti-snagging performance of the grid does not meet the actual requirements, the entire process of grid design, test piece manufacturing, and testing verification must be restarted, consuming a significant amount of time, manpower, material resources, and financial resources. Summary of the Invention

[0004] In view of this, this application provides a method, equipment and medium for analyzing the anti-snagging performance of pressurized water reactor fuel assembly grids, thereby improving the design efficiency of fuel assembly grids.

[0005] In a first aspect, this application provides a method for analyzing the anti-snagging performance of a grid for a pressurized water reactor fuel assembly. The grid includes multiple grid elements for fixing fuel rods, and an outer strip is provided on the outer side of the grid. Guide wings are provided on both the upper and lower edges of the outer strip. Each guide wing includes multiple guide portions, and guide grooves are provided between adjacent guide portions. The method includes:

[0006] Obtain the three-dimensional model of the guide vane;

[0007] Obtain the maximum lateral interference distance between adjacent grids during the hoisting of the fuel assembly;

[0008] Based on the three-dimensional model of the guide wing and the maximum lateral interference distance between adjacent lattice frames, a hook-hanging simulation analysis was performed using finite element analysis software; and

[0009] Based on the results of the hook simulation analysis, the anti-snagging performance of the grid is evaluated.

[0010] In one possible implementation, the three-dimensional model of the guide wing includes a first guide wing and a second guide wing, wherein one of the first guide wing and the second guide wing contains a region corresponding to the guide groove and the centerline corresponds to the lowest point of the guide groove, and the other contains a complete guide portion.

[0011] In one possible implementation, obtaining the three-dimensional model of the guide vane includes:

[0012] Obtain the three-dimensional model of the outer strip;

[0013] The first guide wing of a first length is cut off from the upper edge of the outer strip in the three-dimensional model of the outer strip; and

[0014] The second guide wing of a second length is cut off from the lower edge of the outer strip in the three-dimensional model of the outer strip.

[0015] In one possible implementation, the hook-and-hang simulation analysis using finite element analysis software includes:

[0016] Import the first guide wing and the second guide wing into the finite element analysis software, and place the second guide wing above the first guide wing;

[0017] Set the material parameters of the guide vane;

[0018] The maximum lateral interference distance between the first guide wing and the second guide wing is set as the maximum lateral interference distance between the adjacent grid frames; and

[0019] The initial and final states of the first and second guide wings are set to simulate the hooking process of the first and second guide wings.

[0020] In one possible implementation, setting the initial states of the first guide wing and the second guide wing includes:

[0021] Align the highest point of the top of the second guide wing with the lowest point of the groove of the first guide wing, or align the highest point of the top of the first guide wing with the lowest point of the groove of the second guide wing, provided that the first guide wing and the second guide wing do not contact each other.

[0022] In one possible implementation, simulating the hooking process of the first guide wing and the second guide wing includes:

[0023] A load is applied to the vertical contact surface of the second guide vane and in the horizontal direction, such that the second guide vane and the first guide vane do not detach when they contact each other; and

[0024] The second guide wing is configured to slide downwards, so that the second guide wing and the first guide wing come into contact and then separate.

[0025] In one possible implementation, the hook simulation analysis using finite element analysis software further includes:

[0026] A fixed rigid cylinder is provided on the inner side of the first guide vane to simulate the fuel rod in the grid cell.

[0027] In one possible implementation, evaluating the anti-snagging performance of the grid based on the results of the hook simulation analysis includes:

[0028] Acquire stress and / or strain data of the first guide wing and the second guide wing during the hooking process;

[0029] Based on the stress data or the strain data, determine whether the first guide vane and the second guide vane have undergone plastic deformation; and

[0030] If the first guide wing and the second guide wing do not undergo plastic deformation or the area of ​​plastic deformation is less than or equal to the threshold, then the grid is confirmed to have good anti-snagging performance.

[0031] In one possible implementation, obtaining the maximum lateral interference distance between adjacent grids during the hoisting of the fuel assembly includes:

[0032] Obtain the lateral length of the cell, the thickness of the outer strip, the lateral outer diameter of the fuel rod, the height of the cell's clamping structure, and the maximum deformation of the clamping architecture; and

[0033] The maximum lateral interference distance between adjacent grid cells is obtained by adding the thickness of the outer strip to the lateral length of the grid cell, and then subtracting the difference between the lateral outer diameter of the fuel rod, the height of the clamping structure, and the maximum deformation.

[0034] In one possible implementation, the first length and the second length are equal.

[0035] In one possible implementation, both the first length and the second length are equal to the lateral length of the gate element.

[0036] Secondly, this application provides an electronic device, comprising:

[0037] At least one processor; and

[0038] At least one memory storing instructions that, when executed individually or jointly by the at least one processor, cause the electronic device to perform the method as described in the first aspect.

[0039] Thirdly, this application provides a computer-readable medium storing instructions that, when executed individually or jointly by at least one processor of an electronic device, cause the electronic device to perform the method described in the first aspect.

[0040] This application utilizes finite element analysis software to simulate and analyze the hooking of fuel assembly grids based on the three-dimensional model of the grid's guide vanes and the maximum lateral interference distance between adjacent grids during fuel assembly hoisting. This allows for the preliminary prediction of the grid's anti-hooking performance, preventing unreasonable grid designs from being passed on to the next stage, reducing the waste of time, manpower, material resources, and financial resources, and improving the design efficiency of fuel assembly grids. Attached Figure Description

[0041] The accompanying drawings are included to provide a further understanding of this application; they are incorporated into and constitute a part of this application. The drawings illustrate embodiments of this application and, together with this specification, serve to explain the principles of this application. In the drawings:

[0042] Figure 1 This is a partial structural schematic diagram of the lattice provided in an embodiment of this application;

[0043] Figure 2 This is a partial structural schematic diagram of the outer strip provided in an embodiment of this application;

[0044] Figure 3 This is a flowchart illustrating the method for analyzing the anti-snagging performance of the grid of a pressurized water reactor fuel assembly provided in this application embodiment;

[0045] Figure 4 This is a schematic diagram of the structure of the first guide vane provided in an embodiment of this application;

[0046] Figure 5 This is a schematic diagram of the structure of the second guide vane provided in an embodiment of this application;

[0047] Figure 6 This is a schematic diagram of the maximum lateral interference distance between adjacent grids during the fuel assembly hoisting process provided in this application embodiment;

[0048] Figure 7 This is a front view schematic diagram of the initial state of the first guide wing and the second guide wing provided in the embodiments of this application;

[0049] Figure 8 This is a side view schematic diagram of the initial state of the first guide wing and the second guide wing provided in the embodiments of this application;

[0050] Figure 9 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0051] The attached figures are labeled as follows:

[0052] 100. Grid; 110. Cell; 120. Fuel rod; 101. Inner strip; 102. Outer strip; 103. Clamping structure; 121. Guide section; 122. Guide groove; 201. First guide wing; 202. Second guide wing; 300. Method; 900. Electronic device; 901. Communication bus; 902. Processor; 903. Read-only memory; 904. Random access memory; 905. Communication port; 906. Hard disk. Detailed Implementation

[0053] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0054] As indicated in this application, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0055] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0056] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0057] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0058] Furthermore, it should be noted that the use of terms such as "first" and "second" to define the objects is merely for the purpose of distinguishing the corresponding objects. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. In addition, although the terminology used in this application is selected from commonly known and used terms, some terms mentioned in this application's specification may have been chosen by the applicant according to his or her judgment, and their detailed meanings are explained in the relevant sections of this description. Moreover, this application should be understood not only through the actual terms used, but also through the meaning implied by each term.

[0059] It should be understood that when a component is referred to as "on another component," "connected to another component," "coupled to another component," or "in contact with another component," it can be directly on, connected to, coupled to, or in contact with that other component, or there may be an intervening component. In contrast, when a component is referred to as "directly on another component," "directly connected to," "directly coupled to," or "directly in contact with" another component, there is no intervening component. Similarly, when a first component is referred to as "electrically contacting" or "electrically coupled to" a second component, there is an electrical path between the first and second components that allows current to flow. This electrical path may include capacitors, coupled inductors, and / or other components that allow current to flow, even if there is no direct contact between the conductive components.

[0060] This application uses flowcharts to illustrate the operations performed by an apparatus or device according to embodiments of this application. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, these steps can be processed in reverse order or simultaneously. Furthermore, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0061] Figure 1 This is a partial structural diagram of the example frame 100 provided in an embodiment of this application. For example... Figure 1 As shown, the grid 100 includes a plurality of grid cells 110 for securing fuel rods 120, and an outer strip 102 is provided on the outer side of the grid 100. Exemplarily, the grid 100 is formed by orthogonally interlocking a plurality of inner strips 101 and outer strips 102, which interlock to form a plurality of grid cells 110. A clamping structure 103 can be used to apply a clamping force to the fuel rods 120 within the grid cells 110 to better secure the fuel rods 120. It will be understood that the grid 100 is not required to include... Figure 1 All elements shown in the diagram may also be included in the grid 100. Figure 1 Other elements not shown in the text.

[0062] exist Figure 1 In the illustrated embodiment, the fuel rod 120 is cylindrical with a circular cross-section. The grid cell 110 is square, with equal horizontal and vertical lengths. It is understood that in other embodiments, the fuel rod 120 may be a cube, cuboid, or other shape; correspondingly, the grid cell 110 may also be other shapes, such as a rectangle, with unequal horizontal and vertical lengths.

[0063] Please refer to Figure 2The outer strip 102 has guide wings at both its upper and lower edges. Each guide wing includes multiple guide portions 121, with guide grooves 122 between adjacent guide portions 121. The guide wings enhance the guiding function of the grid 100, reducing the risk of the grid snagging during fuel assembly refueling. In some embodiments, the guide portions 121 are bent inwards towards the grid element 110, such as... Figure 1 As shown. The specific structure of the guide wing, i.e. the guide part 121 and the guide groove 122, is not limited in the embodiments of this application, as long as it can play a guiding role.

[0064] Figure 3 This is a flowchart of an exemplary method 300 for analyzing the anti-snagging performance of the grid of a pressurized water reactor fuel assembly according to an embodiment of this application. Method 300 can be used to analyze the anti-snagging performance of the grid of a pressurized water reactor fuel assembly. Figure 1 The anti-snagging performance of the grid 100 shown is analyzed. For discussion purposes, references will be made. Figure 1 and Figure 2 Method 300 is described. It should be understood that method 300 may include additional steps not shown and / or some steps shown may be omitted, and the scope of this application is not limited thereto.

[0065] In step S310, the three-dimensional model of the guide vane is obtained.

[0066] The 3D model of the guide wing can be stored in advance on a local or cloud server. Alternatively, 3D modeling software, such as SolidWorks, can be used to construct the 3D model of the guide wing. In some embodiments, the 3D model of the guide wing includes a first guide wing and a second guide wing, wherein one of the first and second guide wings contains an area corresponding to the guide groove 122, and its centerline corresponds to the lowest point of the guide groove 122; the other contains a complete guide section 121. By selecting the first and second guide wing, the hooking process of the grid 100 can be simulated more efficiently, thereby improving the efficiency of simulation analysis.

[0067] To more clearly explain the "first guide vane" and the "second guide vane," the following will combine... Figure 2 , Figure 4 and Figure 5 To describe. Figure 4 This is a structural diagram of an exemplary first guide wing 201 provided in an embodiment of this application. Figure 5This is a structural diagram of an exemplary second guide wing 202 provided in an embodiment of this application. In this embodiment, the first guide wing 201 includes a region corresponding to the guide groove 122, and its centerline corresponds to the lowest point of the guide groove 122; the second guide wing 202 includes a complete guide portion 121. It can be understood that in some other embodiments, the first guide wing 201 may include a complete guide portion 121, and the second guide wing 202 may include a region corresponding to the guide groove 122, with its centerline corresponding to the lowest point of the guide groove 122.

[0068] In some embodiments, a three-dimensional model of the outer strip 102 can be obtained first, and then a first guide wing 201 of a first length can be cut from the upper edge of the outer strip 102 in the three-dimensional model of the outer strip 102, and a second guide wing 202 of a second length can be cut from the lower edge of the outer strip 102 in the three-dimensional model of the outer strip 102, such as... Figure 2 As shown. In an exemplary embodiment, the first length of the first guide wing 201 and the second length of the second guide wing 202 are equal, for example, both the first length and the second length are equal to the lateral length of the grid cell 100, thereby simulating the hooking process more efficiently and improving the efficiency of simulation analysis.

[0069] In step S320, the maximum lateral interference distance between adjacent grids during the fuel assembly hoisting process is obtained.

[0070] The maximum lateral interference distance between adjacent grids during fuel assembly hoisting can be pre-stored on a local or cloud server, or calculated online. For example, please refer to... Figure 6 First, obtain the lateral length W of cell 110, the thickness T of outer strip 102, the lateral outer diameter D of fuel rod 120, the height H of clamping structure 103 of cell 110, and the maximum deformation d of clamping structure 103. Then, add the lateral length W of cell 110 to the thickness T of outer strip 102, and subtract the difference between the lateral outer diameter D of fuel rod 120 and the height H of clamping structure 103 and the maximum deformation d to obtain the maximum lateral interference distance L between adjacent grids. An example of the formula for calculating the maximum lateral interference distance L is as follows:

[0071] L=W+TD-(Hd) (1)

[0072] It should be noted that, in Figure 6 In the embodiment shown, the fuel rod 120 has a circular cross-section, therefore its lateral outer diameter and longitudinal outer diameter are equal. Figure 6 The diagram uses the longitudinal outer diameter to illustrate the other parameters more clearly.

[0073] This application embodiment, through dimensional analysis of the grid element 110, completes the reasonable setting of boundary conditions, thereby improving the reliability and accuracy of the simulation analysis results of the grid guide wing hook.

[0074] In step S330, based on the three-dimensional model of the guide wing and the maximum lateral interference distance between adjacent grids, a hook simulation analysis is performed using finite element analysis software.

[0075] Finite Element Analysis (FEA) is a numerical analysis method used to solve complex engineering problems. Common finite element analysis software includes ANSYS and ABAQUS.

[0076] In some embodiments, the hook-and-hook simulation analysis using finite element analysis software includes: importing a first guide wing and a second guide wing into the finite element analysis software, and placing the second guide wing above the first guide wing; setting the material parameters of the guide wing, such as material density, elastic modulus, Poisson's ratio, yield strength, etc.; setting the maximum lateral interference distance between the first guide wing and the second guide wing as the maximum lateral interference distance between adjacent grids; and setting the initial and final states of the first guide wing and the second guide wing to simulate the hook-and-hook process of the first guide wing and the second guide wing. By simulating the hook-and-hook process of the first guide wing and the second guide wing, the hook-and-hook process of the grid can be simulated more simply and effectively, thereby improving simulation efficiency.

[0077] In step S310 of this embodiment, a first guide wing 201 is cut from the upper edge of the outer strip 102 in the three-dimensional model of the outer strip 102, and a second guide wing 202 is cut from the lower edge of the outer strip 102 in the three-dimensional model of the outer strip 102, thus placing the second guide wing 202 above the first guide wing 201. Figure 7 As shown. Specifically, the first guide wing 201 is placed in a lower position and fixed, and is regarded as the guide wing of the upper edge of the lower position grid during the hooking process of adjacent fuel assembly grids. The second guide wing 202 is placed above the first guide wing 201 and is regarded as the guide wing of the lower edge of the higher position grid during the hooking process of adjacent fuel assembly grids.

[0078] In some embodiments, setting the initial state of the first guide wing 201 and the second guide wing 202 includes aligning the highest point of the top of the second guide wing 202 with the lowest point of the groove of the first guide wing 201, and ensuring that the first guide wing 201 and the second guide wing 202 do not contact each other. In other embodiments, if the second guide wing 202 includes a region corresponding to the guide groove 122, and its centerline corresponds to the lowest point of the guide groove 122, and the first guide wing 201 includes a complete guide portion 121, then the highest point of the top of the first guide wing 201 is aligned with the lowest point of the groove of the second guide wing 202. In such embodiments, the probability of the grid 100 hooking is maximized when the highest point of the top of one of the first guide wing 201 and the second guide wing 202 is aligned with the lowest point of the groove of the other. This allows for simulation of the most extreme cases during fuel assembly hoisting, improving the reliability and accuracy of the grid guide wing hooking simulation analysis results.

[0079] exist Figure 7 In the illustrated embodiment, the first length of the first guide wing 201 and the second length of the second guide wing 202 are both equal to the lateral length W of the grid cell 110. Therefore, by offsetting the first guide wing 201 and the second guide wing 202 by an appropriate distance S, the highest point of the top of the second guide wing 202 can be aligned with the lowest point of the groove in the first guide wing 201. For example, the guide wings of the outer strip 102 of the grid 100 are symmetrical vertically, and the horizontal offset distance between the first guide wing 201 and the second guide wing 202 is approximately half a grid cell, i.e., S ≈ 1 / 2 W.

[0080] In some embodiments, simulating the hooking process of the first guide wing and the second guide wing includes: applying a load in the horizontal direction to the vertical contact surface of the second guide wing, so that the second guide wing and the first guide wing do not detach when they contact; and setting the second guide wing to slide downwards, so that the second guide wing and the first guide wing contact and then detach. Please refer to... Figure 8 A load F is applied to the vertical contact surface of the second guide wing 202 and in the horizontal direction, so that the first guide wing 201 and the second guide wing 202 do not separate when they come into contact; and the second guide wing 202 is set to slide downward, so that the first guide wing 201 and the second guide wing 202 make contact and then separate. The terminating state of the first guide wing 201 and the second guide wing 202 is the state in which the first guide wing 201 and the second guide wing 202 make contact and then separate, so the terminating state of the two is simply the state of separation after contact.

[0081] In some embodiments, a fixed rigid cylinder may be provided inside the first guide wing 201 to simulate the fuel rod 120 in the grid cell 110. In this case, the fuel rod 120 is in close contact with the second guide wing 202, which can prevent the lateral interference distance between the first guide wing 201 and the second guide wing 202 from exceeding the maximum set value L.

[0082] In step S340, the anti-snagging performance of the grid is evaluated based on the results of the hook simulation analysis.

[0083] In some embodiments, stress data and / or strain data of the first guide wing and the second guide wing are obtained during the hooking process in step S330; based on the stress data or the strain data, it is determined whether the first guide wing and the second guide wing have undergone plastic deformation; and if the first guide wing and the second guide wing have not undergone plastic deformation or the area of ​​plastic deformation is less than or equal to a threshold, the anti-hooking performance of the grid is confirmed to be good.

[0084] Specifically, the simulation analysis results of step S330 are processed to obtain stress and / or strain data for the first guide wing 201 and the second guide wing 202. Then, the maximum stress in the stress data of both guide wing 201 and the second guide wing 202 is compared with the yield strength of the material (the material's intrinsic property) to determine whether plastic deformation has occurred. Alternatively, the strain data of both guide wing 201 and the second guide wing 202 are assessed to determine whether residual deformation has occurred. If neither guide wing 201 nor the second guide wing 202 has undergone plastic deformation, or if the area of ​​plastic deformation is less than or equal to a threshold (e.g., less than the plastic deformation range of a grid guide wing with good operating experience), then the anti-snagging performance of the grid 100 is confirmed to be good. Conversely, the anti-snagging performance of the grid 100 is poor.

[0085] This application embodiment uses finite element analysis software to simulate and analyze the hooking of the fuel assembly grid based on the three-dimensional model of the grid's guide wing and the maximum lateral interference distance between adjacent grids during fuel assembly hoisting. This allows for the preliminary prediction of the grid's anti-hooking performance, preventing unreasonable grid designs from being passed on to the next stage, reducing the waste of time, manpower, material resources, and financial resources, and improving the design efficiency of the fuel assembly grid.

[0086] An embodiment of this application also proposes a method such as Figure 9 The electronic device 900 shown. According to... Figure 9 The electronic device 900 may include an internal communication bus 901, a processor 902, a read-only memory (ROM) 903, a random access memory (RAM) 904, and a communication port 905. When used in a personal computer, the electronic device 900 may also include a hard disk 906.

[0087] The internal communication bus 901 enables data communication between components of the electronic device 900. The processor 902 can perform judgments and issue prompts. In some embodiments, the processor 902 may consist of one or more processors. The communication port 905 enables data communication between the electronic device 900 and external devices. In some embodiments, the electronic device 900 can send and receive information and data from a network through the communication port 905.

[0088] Electronic device 900 may also include different forms of program storage units and data storage units, such as hard disk 906, read-only memory (ROM) 903, and random access memory (RAM) 904, capable of storing various data files used for computer processing and / or communication, as well as possible program instructions executed by processor 902. Processor 902 executes these instructions to cause electronic device 900 to perform method 300. The results processed by processor 902 are transmitted to user equipment via communication port 905 and displayed on the user interface.

[0089] In addition, this application also proposes a computer-readable medium storing computer program instructions, which, when executed alone or together by at least one processor of an electronic device, cause the electronic device to perform method 300.

[0090] Some aspects of this application can be executed entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. The aforementioned hardware or software may be referred to as a "data block," "module," "engine," "unit," "component," or "system." 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. Furthermore, aspects of this application may manifest as computer products residing in one or more computer-readable media, including computer-readable program code. For example, computer-readable media may include, but are not limited to, magnetic storage devices (e.g., hard disks, floppy disks, magnetic tapes, etc.), optical discs (e.g., compressed CDs, digital multifunction DVDs, etc.), smart cards, and flash memory devices (e.g., cards, sticks, key drives, etc.).

[0091] A computer-readable medium may contain a propagated data signal containing computer program code, for example, on baseband or as part of a carrier wave. This propagated signal may take various forms, including electromagnetic, optical, and so on, or suitable combinations thereof. A computer-readable medium can be any computer-readable medium other than a computer-readable storage medium, which can be connected to an instruction execution system, apparatus, or device to enable communication, propagation, or transmission of a program for use. The program code located on the computer-readable medium can be propagated through any suitable medium, including radio, cable, fiber optic cable, radio frequency signals, or similar media, or any combination of the above media.

[0092] The basic concepts have been described above. Obviously, for those skilled in the art, the above disclosure is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0093] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0094] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned. In fact, the embodiments have fewer features than all the features of the single embodiments disclosed above.

[0095] Although this application has been described with reference to specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate this application, and various equivalent changes or substitutions can be made without departing from the spirit of this application. Therefore, any changes or modifications to the above embodiments within the scope of the essential spirit of this application will fall within the scope of this application.

Claims

1. A method for analyzing anti-hooking performance of a lattice of a pressurized water reactor fuel assembly, the lattice including a plurality of cells for fixing fuel rods, an outer strip being provided at an outer side of the lattice, upper and lower edges of the outer strip each being provided with a guide wing, the guide wing including a plurality of guide portions, a guide groove being provided between adjacent guide portions, characterized in that, The method comprises: obtaining a three-dimensional model of the guide wing; obtaining a maximum transverse interference distance between adjacent grids in the fuel assembly hoisting process; performing a hooking simulation analysis on the guide wing by using a finite element analysis software according to the three-dimensional model of the guide wing and the maximum transverse interference distance between adjacent grids; and evaluating the anti-hooking performance of the grid according to the result of the hooking simulation analysis.

2. The method of claim 1, wherein, The three-dimensional model of the guide wing comprises a first guide wing and a second guide wing, wherein one of the first guide wing and the second guide wing comprises a region corresponding to the guide groove, and a center line corresponds to the lowest point of the guide groove, and the other comprises a complete guide part.

3. The method of claim 2, wherein, The obtaining of the three-dimensional model of the guide wing comprises: obtaining a three-dimensional model of the outer strip; cutting a first length of the first guide wing at the upper edge of the outer strip in the three-dimensional model of the outer strip; and cutting a second length of the second guide wing at the lower edge of the outer strip in the three-dimensional model of the outer strip.

4. The method of claim 3, wherein, The performing of the hooking simulation analysis by using the finite element analysis software comprises: importing the first guide wing and the second guide wing into the finite element analysis software, and placing the second guide wing above the first guide wing; setting material parameters of the guide wing; setting the maximum transverse interference distance of the first guide wing and the second guide wing as the maximum transverse interference distance between adjacent grids; and setting initial state and terminal state of the first guide wing and the second guide wing to simulate the hooking process of the first guide wing and the second guide wing.

5. The method of claim 4, wherein, The setting of the initial state of the first guide wing and the second guide wing comprises: aligning the top highest point of the second guide wing with the groove lowest point of the first guide wing, or aligning the top highest point of the first guide wing with the groove lowest point of the second guide wing, and neither of the first guide wing and the second guide wing is in contact.

6. The method of claim 4, wherein, The simulating of the hooking process of the first guide wing and the second guide wing comprises: applying a load on the vertical contact surface of the second guide wing and in the horizontal direction, so that the second guide wing and the first guide wing do not separate when they are in contact; and setting the second guide wing to slide downward, so that the second guide wing and the first guide wing are in contact and then separated.

7. The method of claim 4, wherein, The performing of the hooking simulation analysis by using the finite element analysis software further comprises: setting a fixed rigid cylinder on the inner side of the first guide wing to simulate the fuel rod in the grid element.

8. The method of claim 4, wherein, The evaluating of the anti-hooking performance of the grid according to the result of the hooking simulation analysis comprises: obtaining stress data and / or strain data of the first guide wing and the second guide wing in the hooking process; judging whether the first guide wing and the second guide wing are plastically deformed according to the stress data or according to the strain data; and if the first guide wing and the second guide wing do not plastically deform or the range of the region where the first guide wing and the second guide wing plastically deform is less than or equal to a threshold value, it is confirmed that the anti-hooking performance of the grid is good.

9. The method of any one of claims 1-8, wherein, The obtaining the transverse maximum interference distance between the adjacent grids in the fuel assembly hoisting process comprises: obtaining a transverse length of the grid element, a thickness of the outer strip, a transverse outer diameter of the fuel rod, a height of a clamping structure of the grid element, and a maximum deformation amount of the clamping structure; and adding the transverse length of the grid element and the thickness of the outer strip, and subtracting the difference between the transverse outer diameter of the fuel rod and the height of the clamping structure and the maximum deformation amount, to obtain the transverse maximum interference distance between the adjacent grids.

10. The method of any one of claims 3-8, wherein, The first length and the second length are equal.

11. The method of claim 10, wherein, The first length and the second length are both equal to the transverse length of the grid element.

12. An electronic device, comprising: comprise: at least one processor; and at least one memory having instructions stored thereon, which, when executed by the at least one processor, cause the electronic device to perform the method of any one of claims 1-11.

13. A computer readable medium characterized by The computer readable medium has instructions stored thereon, which, when executed by at least one processor of an electronic device, cause the electronic device to perform the method of any one of claims 1-11.

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