Method, apparatus, device, medium, and product for seismic evaluation of fuel assemblies

Abstract

This application relates to a method, apparatus, device, medium, and product for seismic assessment of fuel assemblies. The method includes: acquiring seismic acceleration time-history data of the area where the target nuclear energy conversion equipment is located; and conducting a seismic assessment of the fuel assemblies in the target nuclear energy conversion equipment based on the seismic acceleration time-history data. This method eliminates the need to establish a complex reactor-fuel assembly coupled dynamic model; it directly uses the seismic acceleration time-history data of the area where the target nuclear energy conversion equipment is located to obtain the seismic assessment results of the fuel assemblies. Compared to traditional methods that obtain seismic analysis results of fuel assemblies through multiple iterations, this simplifies the seismic assessment process, effectively shortens the seismic analysis cycle of fuel assemblies, and improves the design efficiency of fuel assemblies.

Description

Technical Field

[0001] This application relates to the field of seismic analysis technology, and in particular to a method, apparatus, equipment, medium and product for seismic assessment of fuel assemblies. Background Technology

[0002] Fuel assemblies are the core components of nuclear power plant reactors. The structural integrity of fuel assemblies under seismic conditions determines the safety of nuclear power plants. Therefore, conducting seismic analysis on fuel assemblies is an important step in ensuring the safety of nuclear power plants.

[0003] In related technologies, seismic excitation data is typically applied to a reactor-fuel assembly coupled dynamic model. The dynamic equations are solved using an integral method to obtain the excitation response results of the reactor output. Then, the excitation response results are transferred to the fuel assembly. The above process requires multiple iterations to obtain the seismic analysis results of the fuel assembly, which results in a long analysis cycle and affects the design efficiency of the fuel assembly.

[0004] Therefore, how to shorten the seismic analysis cycle of fuel assemblies in order to improve the design efficiency of fuel assemblies is a problem worthy of attention. Summary of the Invention

[0005] Therefore, it is necessary to provide a method, apparatus, equipment, medium, and product for seismic assessment of fuel assemblies that can shorten the seismic analysis cycle of fuel assemblies, addressing the aforementioned technical problems.

[0006] In a first aspect, this application provides a method for seismic assessment of fuel assemblies, comprising:

[0007] Acquire time-history data of seismic acceleration in the area where the target nuclear energy conversion equipment is located;

[0008] Based on seismic acceleration time history data, a seismic assessment is conducted on the fuel assemblies in the target nuclear energy conversion equipment.

[0009] In one embodiment, a seismic assessment of the fuel assemblies in the target nuclear energy conversion device is performed based on seismic acceleration time history data, including: determining excitation time history data based on the seismic acceleration time history data; and performing a seismic assessment of the fuel assemblies based on the excitation time history data.

[0010] In one embodiment, determining excitation time history data based on seismic acceleration time history data includes: determining seismic velocity time history data based on seismic acceleration time history data; and determining seismic displacement time history data based on seismic velocity time history data; the excitation time history data includes at least one of seismic velocity time history data and seismic displacement time history data.

[0011] In one embodiment, the seismic assessment of the fuel assembly is performed based on excitation time history data, including: determining the seismic response data of the fuel assembly based on the excitation time history data; and performing a seismic assessment of the fuel assembly based on the seismic response data.

[0012] In one embodiment, the seismic response data includes a target grid load for a storage grid used to store fuel assemblies; determining the seismic response data of the fuel assembly based on excitation time history data includes: determining an initial grid load for the storage grid corresponding to the fuel assembly based on the excitation time history data; determining the seismic response data of the fuel assembly based on the initial grid load and a first difference between the initial grid load and a reference grid load for the storage grid corresponding to the fuel assembly; wherein the reference grid load is determined based on seismic time history data corresponding to the reactor in the target nuclear energy conversion device.

[0013] In one embodiment, the seismic response data of the fuel assembly is determined based on the initial grid load and a first difference between the initial grid load and the reference grid load of the storage grid corresponding to the fuel assembly, including: if the first difference is less than a preset difference, correcting the initial grid load to obtain the target grid load; and if the first difference is not less than the preset difference, using the initial grid load as the target grid load.

[0014] In one embodiment, the seismic response data includes target grid loads on the storage grids for storing fuel assemblies and target response data corresponding to the fuel rods in the fuel assembly. Based on the seismic response data, a seismic assessment of the fuel assembly is performed, including: determining the reliability of the seismic response data based on a second difference between the target grid load and a reference grid load on the storage grid corresponding to the fuel assembly, and a third difference between the target response data and the reference response data corresponding to the fuel rods in the fuel assembly; wherein the reference grid load and reference response data are determined based on seismic time history data of the reactor in the target nuclear energy conversion device; and, if the reliability indicates that the seismic response data is reliable, a seismic assessment of the fuel assembly is performed based on the seismic response data.

[0015] In one embodiment, the seismic response data includes the maximum principal stress corresponding to the fuel assembly and the target grid load of the storage grid used to store the fuel assembly; based on the seismic response data, the seismic assessment of the fuel assembly includes: determining that the fuel assembly meets the seismic requirements if the maximum principal stress is not greater than a preset stress threshold and the target grid load is not greater than a preset load threshold.

[0016] In one embodiment, the seismic assessment of the fuel assembly is performed based on the excitation time history data, including: applying the excitation time history data to the fuel assembly simulation model corresponding to the fuel assembly to obtain the seismic assessment result of the fuel assembly.

[0017] Secondly, this application also provides a seismic assessment device for fuel assemblies, comprising:

[0018] The acquisition module is used to acquire seismic acceleration time history data of the area where the target nuclear energy conversion equipment is located;

[0019] The assessment module is used to conduct seismic assessments of fuel assemblies in a target nuclear energy conversion device based on seismic acceleration time history data.

[0020] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0021] Acquire time-history data of seismic acceleration in the area where the target nuclear energy conversion equipment is located;

[0022] Based on seismic acceleration time history data, a seismic assessment is conducted on the fuel assemblies in the target nuclear energy conversion equipment.

[0023] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0024] Acquire time-history data of seismic acceleration in the area where the target nuclear energy conversion equipment is located;

[0025] Based on seismic acceleration time history data, a seismic assessment is conducted on the fuel assemblies in the target nuclear energy conversion equipment.

[0026] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, performs the following steps:

[0027] Acquire time-history data of seismic acceleration in the area where the target nuclear energy conversion equipment is located;

[0028] Based on seismic acceleration time history data, a seismic assessment is conducted on the fuel assemblies in the target nuclear energy conversion equipment.

[0029] The aforementioned seismic assessment methods, devices, equipment, media, and products for fuel assemblies acquire seismic acceleration time-history data of the area where the target nuclear energy conversion equipment is located; based on the seismic acceleration time-history data, a seismic assessment is conducted on the fuel assemblies in the target nuclear energy conversion equipment; in the above process, there is no need to establish a complex reactor-fuel assembly coupled dynamic model, and the seismic acceleration time-history data of the area where the target nuclear energy conversion equipment is located can be directly used to obtain the seismic assessment results of the fuel assemblies. Compared with the traditional method of obtaining the seismic analysis results of fuel assemblies through multiple iterations, this simplifies the seismic assessment process, can effectively shorten the seismic analysis cycle of fuel assemblies, and improve the design efficiency of fuel assemblies. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a diagram illustrating the application environment of a seismic assessment method for fuel assemblies in one embodiment.

[0032] Figure 2 This is a flowchart illustrating a seismic assessment method for a fuel assembly in one embodiment;

[0033] Figure 3 This is a flowchart illustrating the seismic assessment steps in one embodiment;

[0034] Figure 4 This is a flowchart illustrating the seismic assessment method for a fuel assembly in another embodiment;

[0035] Figure 5 This is a structural block diagram of a seismic assessment device for a fuel assembly in one embodiment;

[0036] Figure 6 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0038] The seismic assessment method for fuel assemblies provided in this application can be applied to, for example... Figure 1In the application environment shown, terminal 102 communicates with server 104 via a network. A data storage system can store the data that server 104 needs to process. The data storage system can be integrated onto server 104 or located on the cloud or other network servers. Terminal 102 can be, but is not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, smart in-vehicle devices, projection devices, etc. Portable wearable devices can include smartwatches, smart bracelets, head-mounted devices, etc. Head-mounted devices can be virtual reality (VR) devices, augmented reality (AR) devices, smart glasses, etc. Server 104 can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services.

[0039] In one exemplary embodiment, such as Figure 2 As shown, a seismic assessment method for fuel assemblies is provided, which can be applied to... Figure 1 Taking the server in the example, the following steps are included:

[0040] S210: Obtain seismic acceleration time history data for the area where the target nuclear energy conversion equipment is located.

[0041] Among them, the target nuclear energy conversion equipment can be understood as equipment that converts nuclear energy into electrical energy through nuclear reactions, such as a nuclear power plant.

[0042] Seismic acceleration time history data can be used to measure the ground motion acceleration during an earthquake and to determine the intensity of the ground motion. In some embodiments, seismic acceleration time history data may include at least one of time history duration, time interval, and peak ground acceleration (PGA). The time history duration can be understood as the duration of the ground motion acceleration record, i.e., the length from the start time to the end time; for example, the time history duration is 30-60 seconds, covering the mainshock phase of the earthquake. The time interval can be understood as the time difference between two consecutive acceleration sampling times; for example, the time interval is 0.01-0.02 seconds. Peak ground acceleration (PGA) can be understood as the absolute value of the largest amplitude in the ground motion acceleration time history, and can be determined based on the seismic intensity of the area where the target nuclear energy conversion equipment is located.

[0043] In some embodiments, seismic acceleration time history data can be obtained based on the location information of the area where the target nuclear energy conversion equipment is located.

[0044] S220 conducts a seismic assessment of the fuel assemblies in the target nuclear energy conversion equipment based on seismic acceleration time history data.

[0045] The above-mentioned seismic assessment method for fuel assemblies does not require the establishment of a complex reactor-fuel assembly coupled dynamic model. It can directly use the seismic acceleration time history data of the area where the target nuclear energy conversion equipment is located to obtain the seismic assessment results of the fuel assembly. Compared with the traditional method of obtaining the seismic analysis results of the fuel assembly through multiple iterations, it simplifies the seismic assessment process, can effectively shorten the seismic analysis cycle of the fuel assembly, and improve the design efficiency of the fuel assembly.

[0046] Based on the technical solutions of the above embodiments, this application also provides another optional embodiment, in which the seismic assessment steps of S220 are refined.

[0047] See Figure 3 The seismic assessment steps shown include:

[0048] S310, based on the seismic acceleration time history data, determine the excitation time history data.

[0049] Among them, the excitation time history data can be understood as the discrete sampled values ​​of external excitation (such as seismic velocity, displacement, etc.) on the time axis, which are used to conduct seismic assessment of fuel assemblies.

[0050] In some embodiments, the excitation time history data may include at least one of seismic velocity time history data and seismic displacement time history data.

[0051] In some embodiments, seismic velocity time history data can be determined based on seismic acceleration time history data. Seismic displacement time history data can then be determined based on the seismic velocity time history data. Specifically, seismic acceleration time history data can be integrated to obtain seismic velocity time history data. Seismic displacement time history data can be obtained by integrating the seismic velocity time history data.

[0052] In some embodiments, the above integration process can employ linear interpolation, which can avoid numerical drift to some extent.

[0053] S320 performs seismic assessment of fuel assemblies based on excitation time history data.

[0054] In some embodiments, excitation time-history data can be applied to the fuel assembly simulation model corresponding to the fuel assembly to obtain seismic assessment results for the fuel assembly. Specifically, excitation time-history data can be applied to the bottom of the fuel assembly simulation model to simulate the excitation transmitted through the reactor during an actual earthquake.

[0055] The fuel assembly simulation model can be constructed using finite element software. The model includes only core load-bearing components and simplifies secondary components. For example, fuel rods are simulated using beam elements, with interface parameters input according to actual dimensions; the positioning grid is simulated using shell elements; the guide tube uses solid elements to simulate key areas, while non-key areas are simplified to beam elements; and damping is introduced to match the damping characteristics of the fuel assembly's metal structure.

[0056] In some embodiments, the seismic response data of the fuel assembly can be determined based on the excitation time history data. Specifically, the direct integration method can be used to perform transient dynamic analysis on the excitation time history data to obtain the seismic response data of the fuel assembly. Then, the seismic response data is used to conduct a seismic assessment of the fuel assembly.

[0057] In some embodiments, the seismic response data may include at least one of the following: target grid load for the storage grid used to store fuel assemblies, target response data for the fuel rods in the fuel assembly, and the maximum principal stress of the fuel assembly.

[0058] Among them, the storage rack used to store fuel assemblies is the fuel assembly storage rack. The target rack load can be understood as the external force that the storage rack bears under seismic conditions.

[0059] The target response data corresponding to the fuel rod can be understood as at least one of the fuel rod's maximum acceleration, velocity, and displacement.

[0060] The maximum principal stress corresponding to the fuel assembly can be understood as the maximum principal stress at the connection between the fuel rod and the storage grid and at the root of the guide tube in the fuel assembly.

[0061] In some embodiments, where the seismic response data includes the target lattice load, determining the seismic response data of the fuel assembly based on the excitation time history data may include: determining the initial lattice load of the storage lattice corresponding to the fuel assembly based on the excitation time history data; determining the seismic response data of the fuel assembly based on the initial lattice load and a first difference between the initial lattice load and the reference lattice load of the storage lattice corresponding to the fuel assembly; wherein the reference lattice load is determined based on the seismic time history data corresponding to the reactor in the target nuclear energy conversion device.

[0062] The reference lattice load can be obtained by applying the seismic time history data corresponding to the reactor to the reactor simulation model corresponding to the reactor.

[0063] The initial lattice load can be obtained by using the direct integration method to perform transient dynamic analysis on the excitation time history data.

[0064] In some embodiments, if the first difference between the initial lattice load and the reference lattice load is less than a preset difference, the initial lattice load can be corrected based on a preset correction factor to obtain the target lattice load. Specifically, the product of the preset correction factor and the initial lattice load can be used as the target lattice load.

[0065] In some embodiments, if the first difference between the initial lattice load and the reference lattice load is not greater than a preset difference, the initial lattice load can be used as the target lattice load. For example, the preset difference can be any value between 9% and 11%; the preset correction factor can be 1.1.

[0066] The above embodiments, by correcting the initial lattice load, can ensure that the target lattice load is more accurate to a certain extent, thereby obtaining a more accurate seismic assessment result based on the target lattice load.

[0067] In some embodiments, where the seismic response data includes a target grid load for a storage grid used to store fuel assemblies and target response data corresponding to fuel rods in the fuel assembly, a seismic assessment of the fuel assembly is performed based on the seismic response data. This includes: determining the credibility of the seismic response data based on a second difference between the target grid load and a reference grid load for the storage grid corresponding to the fuel assembly, and a third difference between the target response data and a reference response data corresponding to fuel rods in the fuel assembly; wherein the reference grid load and reference response data are determined based on seismic time history data of the reactor in the target nuclear energy conversion device; and when the credibility indicates that the seismic response data is credible, a seismic assessment of the fuel assembly is performed based on the seismic response data.

[0068] In some embodiments, the reference response data may include reference velocity and reference displacement of the fuel rods. If the peak velocity deviation between the velocity included in the target response data and the reference velocity is not greater than a preset peak velocity deviation threshold (e.g., 10%), the displacement deviation between the displacement included in the target response data and the reference displacement is not greater than a preset displacement deviation threshold (e.g., 3%), and the second difference between the target lattice load and the reference lattice load is not less than a preset difference threshold (e.g., 9%), the seismic response data is considered reliable, and a seismic assessment of the fuel assembly can then be performed based on the target response data.

[0069] In some embodiments, when the seismic response data includes the maximum principal stress corresponding to the fuel assembly and the target grid load of the storage grid for storing the fuel assembly, the seismic assessment of the fuel assembly based on the seismic response data may include: determining that the fuel assembly meets the seismic requirements when the maximum principal stress is not greater than a preset stress threshold and the target grid load is not greater than a preset load threshold.

[0070] The preset stress threshold can be the allowable stress.

[0071] In some embodiments, if the maximum principal stress is greater than a preset stress threshold and / or the target lattice load is greater than a preset load threshold, it can be determined that the fuel assembly does not meet the seismic requirements, and structural adjustment parameters of the fuel assembly can be determined, such as increasing the number of positioning lattices or optimizing the fuel rod cross-section. Then, the above seismic assessment method for the fuel assembly can be repeated until the fuel assembly meets the seismic requirements.

[0072] Based on the technical solutions of the above embodiments, this application also provides another optional embodiment, in which the seismic assessment method of fuel assembly is described in detail.

[0073] See Figure 4 The seismic assessment method for the fuel assembly shown includes:

[0074] S401, acquire seismic acceleration time history data of the area where the target nuclear energy conversion equipment is located.

[0075] S402, determine the earthquake velocity time history data based on the earthquake acceleration time history data.

[0076] S403, determine the earthquake displacement time history data based on the earthquake velocity time history data.

[0077] S404 applies the excitation time history data to the fuel assembly simulation model corresponding to the fuel assembly to determine the initial grid load of the storage grid corresponding to the fuel assembly, the maximum principal stress of the fuel assembly, and the target response data of the fuel rods in the fuel assembly.

[0078] S405, if the first difference is less than the preset difference, the initial lattice load is corrected to obtain the target lattice load.

[0079] S406. Determine the reliability of the seismic response data based on the third difference between the target response data and the reference response data corresponding to the fuel rods in the fuel assembly.

[0080] S407, if the seismic response data is reliable, the maximum principal stress is not greater than the preset stress threshold, and the target lattice load is not greater than the preset load threshold, then the fuel assembly is determined to meet the seismic requirements.

[0081] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0082] Based on the same inventive concept, this application also provides a seismic assessment device for fuel assemblies to implement the seismic assessment method for fuel assemblies described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of one or more embodiments of the seismic assessment device for fuel assemblies provided below can be found in the limitations of the seismic assessment method for fuel assemblies described above, and will not be repeated here.

[0083] In one exemplary embodiment, such as Figure 5 As shown, a seismic assessment device for fuel assemblies is provided, comprising: an acquisition module 510 and an assessment module 520, wherein:

[0084] Module 510 is used to acquire seismic acceleration time history data of the area where the target nuclear energy conversion equipment is located.

[0085] Assessment module 520 is used to conduct seismic assessment of fuel assemblies in a target nuclear energy conversion device based on seismic acceleration time history data.

[0086] In one embodiment, the evaluation module 520 is specifically used to: determine excitation time history data based on seismic acceleration time history data; and perform seismic evaluation on the fuel assembly based on the excitation time history data.

[0087] In one embodiment, the evaluation module 520 is specifically configured to: determine earthquake velocity time history data based on earthquake acceleration time history data; determine earthquake displacement time history data based on earthquake velocity time history data; the excitation time history data includes at least one of earthquake velocity time history data and earthquake displacement time history data.

[0088] In one embodiment, the evaluation module 520 is specifically used to: determine the seismic response data of the fuel assembly based on the excitation time history data; and perform a seismic evaluation of the fuel assembly based on the seismic response data.

[0089] In one embodiment, the seismic response data includes a target grid load for a storage grid used to store fuel assemblies; the evaluation module 520 is specifically configured to: determine an initial grid load for the storage grid corresponding to the fuel assembly based on excitation time history data; and determine seismic response data for the fuel assembly based on the initial grid load and a first difference between the initial grid load and a reference grid load for the storage grid corresponding to the fuel assembly; wherein the reference grid load is determined based on seismic time history data corresponding to the reactor in the target nuclear energy conversion device.

[0090] In one embodiment, the evaluation module 520 is specifically used to: correct the initial lattice load to obtain the target lattice load when the first difference is less than a preset difference; and take the initial lattice load as the target lattice load when the first difference is not less than the preset difference.

[0091] In one embodiment, the seismic response data includes a target grid load for the storage grid used to store fuel assemblies, and target response data corresponding to the fuel rods in the fuel assembly. The evaluation module 520 is specifically configured to: determine the reliability of the seismic response data based on a second difference between the target grid load and a reference grid load for the storage grid corresponding to the fuel assembly, and a third difference between the target response data and the reference response data corresponding to the fuel rods in the fuel assembly; wherein the reference grid load and reference response data are determined based on seismic time history data of the reactor in the target nuclear energy conversion device; and, if the reliability indicates that the seismic response data is reliable, perform a seismic assessment of the fuel assembly based on the seismic response data.

[0092] In one embodiment, the seismic response data includes the maximum principal stress corresponding to the fuel assembly and the target grid load of the storage grid used to store the fuel assembly; the evaluation module 520 is specifically used to: determine that the fuel assembly meets the seismic requirements when the maximum principal stress is not greater than a preset stress threshold and the target grid load is not greater than a preset load threshold.

[0093] In one embodiment, the evaluation module 520 is specifically used to: apply excitation time history data to the fuel assembly simulation model corresponding to the fuel assembly to obtain the seismic evaluation result of the fuel assembly.

[0094] Each module in the aforementioned seismic assessment device for fuel assemblies can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the corresponding operations of each module.

[0095] In one exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 6 As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores relevant data such as seismic acceleration time history data. The I / O interfaces are used for information exchange between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When executed by the processor, the computer program implements a seismic assessment method for fuel assemblies.

[0096] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0097] In one exemplary embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of the seismic assessment method for fuel assemblies provided in any of the above embodiments, or to implement the following steps:

[0098] Acquire time-history data of seismic acceleration in the area where the target nuclear energy conversion equipment is located;

[0099] Based on seismic acceleration time history data, a seismic assessment is conducted on the fuel assemblies in the target nuclear energy conversion equipment.

[0100] In one embodiment, the processor, when executing the computer program, also performs the following steps: determining excitation time history data based on seismic acceleration time history data; and conducting a seismic assessment of the fuel assembly based on the excitation time history data.

[0101] In one embodiment, when the processor executes the computer program, it further performs the following steps: determining seismic velocity time history data based on seismic acceleration time history data; determining seismic displacement time history data based on seismic velocity time history data; the excitation time history data includes at least one of seismic velocity time history data and seismic displacement time history data.

[0102] In one embodiment, the processor, when executing the computer program, further performs the following steps: determining seismic response data of the fuel assembly based on excitation time history data; and conducting a seismic assessment of the fuel assembly based on the seismic response data.

[0103] In one embodiment, the seismic response data includes a target grid load for a storage grid used to store fuel assemblies; the processor, when executing a computer program, further implements the following steps: determining an initial grid load for the storage grid corresponding to the fuel assembly based on excitation time history data; determining seismic response data for the fuel assembly based on the initial grid load and a first difference between the initial grid load and a reference grid load for the storage grid corresponding to the fuel assembly; wherein the reference grid load is determined based on seismic time history data corresponding to the reactor in the target nuclear energy conversion device.

[0104] In one embodiment, when the processor executes the computer program, it further performs the following steps: if the first difference is less than a preset difference, the initial lattice load is corrected to obtain the target lattice load; if the first difference is not less than the preset difference, the initial lattice load is used as the target lattice load.

[0105] In one embodiment, the seismic response data includes a target grid load for a storage grid used to store fuel assemblies, and target response data corresponding to fuel rods in the fuel assembly. When the processor executes the computer program, it further performs the following steps: determining the credibility of the seismic response data based on a second difference between the target grid load and a reference grid load for the storage grid corresponding to the fuel assembly, and a third difference between the target response data and the reference response data corresponding to fuel rods in the fuel assembly; wherein the reference grid load and reference response data are determined based on seismic time history data of the reactor in the target nuclear energy conversion device; and, if the credibility indicates that the seismic response data is credible, performing a seismic assessment of the fuel assembly based on the seismic response data.

[0106] In one embodiment, the seismic response data includes the maximum principal stress corresponding to the fuel assembly and the target grid load of the storage grid used to store the fuel assembly; when the processor executes the computer program, it also performs the following steps: if the maximum principal stress is not greater than a preset stress threshold and the target grid load is not greater than a preset load threshold, it determines that the fuel assembly meets the seismic requirements.

[0107] In one embodiment, when the processor executes the computer program, it also performs the following steps: applying excitation time history data to the fuel assembly simulation model corresponding to the fuel assembly to obtain the seismic assessment result of the fuel assembly.

[0108] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, implements the steps of the seismic assessment method for fuel assemblies provided in any of the above embodiments or implements the following steps:

[0109] Acquire time-history data of seismic acceleration in the area where the target nuclear energy conversion equipment is located;

[0110] Based on seismic acceleration time history data, a seismic assessment is conducted on the fuel assemblies in the target nuclear energy conversion equipment.

[0111] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: determining excitation time history data based on seismic acceleration time history data; and conducting a seismic assessment of the fuel assembly based on the excitation time history data.

[0112] In one embodiment, when the computer program is executed by a processor, it further performs the following steps: determining seismic velocity time history data based on seismic acceleration time history data; determining seismic displacement time history data based on seismic velocity time history data; the excitation time history data includes at least one of seismic velocity time history data and seismic displacement time history data.

[0113] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: determining the seismic response data of the fuel assembly based on the excitation time history data; and performing a seismic assessment of the fuel assembly based on the seismic response data.

[0114] In one embodiment, the seismic response data includes a target grid load for a storage grid used to store fuel assemblies; when executed by a processor, the computer program further performs the following steps: determining an initial grid load for the storage grid corresponding to the fuel assembly based on excitation time history data; determining seismic response data for the fuel assembly based on the initial grid load and a first difference between the initial grid load and a reference grid load for the storage grid corresponding to the fuel assembly; wherein the reference grid load is determined based on seismic time history data corresponding to the reactor in the target nuclear energy conversion device.

[0115] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: if the first difference is less than a preset difference, the initial lattice load is corrected to obtain the target lattice load; if the first difference is not less than the preset difference, the initial lattice load is used as the target lattice load.

[0116] In one embodiment, the seismic response data includes a target grid load for a storage grid used to store fuel assemblies, and target response data corresponding to fuel rods in the fuel assembly. When the computer program is executed by a processor, it further performs the following steps: determining the credibility of the seismic response data based on a second difference between the target grid load and a reference grid load for the storage grid corresponding to the fuel assembly, and a third difference between the target response data and the reference response data corresponding to fuel rods in the fuel assembly; wherein the reference grid load and reference response data are determined based on seismic time history data of the reactor in the target nuclear energy conversion device; and, if the credibility indicates that the seismic response data is credible, performing a seismic assessment of the fuel assembly based on the seismic response data.

[0117] In one embodiment, the seismic response data includes the maximum principal stress corresponding to the fuel assembly and the target grid load of the storage grid used to store the fuel assembly; when the computer program is executed by the processor, it also performs the following steps: determining that the fuel assembly meets the seismic requirements when the maximum principal stress is not greater than a preset stress threshold and the target grid load is not greater than a preset load threshold.

[0118] In one embodiment, when the computer program is executed by a processor, it further performs the following steps:

[0119] The excitation time history data is applied to the fuel assembly simulation model corresponding to the fuel assembly to obtain the seismic assessment results of the fuel assembly.

[0120] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the seismic assessment method for fuel assemblies provided in any of the above embodiments, or implements the following steps:

[0121] Acquire time-history data of seismic acceleration in the area where the target nuclear energy conversion equipment is located;

[0122] Based on seismic acceleration time history data, a seismic assessment is conducted on the fuel assemblies in the target nuclear energy conversion equipment.

[0123] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: determining excitation time history data based on seismic acceleration time history data; and conducting a seismic assessment of the fuel assembly based on the excitation time history data.

[0124] In one embodiment, when the computer program is executed by a processor, it further performs the following steps: determining seismic velocity time history data based on seismic acceleration time history data; determining seismic displacement time history data based on seismic velocity time history data; the excitation time history data includes at least one of seismic velocity time history data and seismic displacement time history data.

[0125] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: determining the seismic response data of the fuel assembly based on the excitation time history data; and performing a seismic assessment of the fuel assembly based on the seismic response data.

[0126] In one embodiment, the seismic response data includes a target grid load for a storage grid used to store fuel assemblies; when executed by a processor, the computer program further performs the following steps: determining an initial grid load for the storage grid corresponding to the fuel assembly based on excitation time history data; determining seismic response data for the fuel assembly based on the initial grid load and a first difference between the initial grid load and a reference grid load for the storage grid corresponding to the fuel assembly; wherein the reference grid load is determined based on seismic time history data corresponding to the reactor in the target nuclear energy conversion device.

[0127] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: if the first difference is less than a preset difference, the initial lattice load is corrected to obtain the target lattice load; if the first difference is not less than the preset difference, the initial lattice load is used as the target lattice load.

[0128] In one embodiment, the seismic response data includes a target grid load for a storage grid used to store fuel assemblies, and target response data corresponding to fuel rods in the fuel assembly. When the computer program is executed by a processor, it further performs the following steps: determining the credibility of the seismic response data based on a second difference between the target grid load and a reference grid load for the storage grid corresponding to the fuel assembly, and a third difference between the target response data and the reference response data corresponding to fuel rods in the fuel assembly; wherein the reference grid load and reference response data are determined based on seismic time history data of the reactor in the target nuclear energy conversion device; and, if the credibility indicates that the seismic response data is credible, performing a seismic assessment of the fuel assembly based on the seismic response data.

[0129] In one embodiment, the seismic response data includes the maximum principal stress corresponding to the fuel assembly and the target grid load of the storage grid used to store the fuel assembly; when the computer program is executed by the processor, it also performs the following steps: determining that the fuel assembly meets the seismic requirements when the maximum principal stress is not greater than a preset stress threshold and the target grid load is not greater than a preset load threshold.

[0130] In one embodiment, when the computer program is executed by a processor, it further performs the following steps:

[0131] The excitation time history data is applied to the fuel assembly simulation model corresponding to the fuel assembly to obtain the seismic assessment results of the fuel assembly.

[0132] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0133] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0134] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for seismic assessment of fuel assemblies, characterized in that, The method includes: Acquire time-history data of seismic acceleration in the area where the target nuclear energy conversion equipment is located; Based on the earthquake acceleration time history data, a seismic assessment is conducted on the fuel assemblies in the target nuclear energy conversion device.

2. The method according to claim 1, characterized in that, The seismic assessment of the fuel assemblies in the target nuclear energy conversion device based on the seismic acceleration time history data includes: Based on the aforementioned seismic acceleration time history data, the excitation time history data is determined; Based on the excitation time history data, the seismic resistance of the fuel assembly is assessed.

3. The method according to claim 2, characterized in that, The step of determining the excitation time history data based on the seismic acceleration time history data includes: Based on the earthquake acceleration time history data, determine the earthquake velocity time history data; Based on the earthquake velocity time history data, determine the earthquake displacement time history data; The excitation time history data includes at least one of the earthquake velocity time history data and the earthquake displacement time history data.

4. The method according to claim 2, characterized in that, The step of conducting a seismic assessment of the fuel assembly based on the excitation time history data includes: Based on the excitation time history data, determine the seismic response data of the fuel assembly; Based on the seismic response data, the seismic resistance of the fuel assembly is assessed.

5. The method according to claim 4, characterized in that, The seismic response data includes the target grid load for the storage grid used to store the fuel assembly; The step of determining the seismic response data of the fuel assembly based on the excitation time history data includes: Based on the excitation time history data, determine the initial grid load of the storage grid corresponding to the fuel assembly; Based on the initial lattice load and a first difference between the initial lattice load and the reference lattice load of the storage lattice corresponding to the fuel assembly, the seismic response data of the fuel assembly is determined. The reference grid load is determined based on the seismic time history data corresponding to the reactor in the target nuclear energy conversion device.

6. The method according to claim 5, characterized in that, The step of determining the seismic response data of the fuel assembly based on the initial lattice load and a first difference between the initial lattice load and the reference lattice load of the storage lattice corresponding to the fuel assembly includes: If the first difference is less than a preset difference, the initial lattice load is corrected to obtain the target lattice load; If the first difference is not less than a preset difference, the initial lattice load is taken as the target lattice load.

7. The method according to claim 4, characterized in that, The seismic response data includes the target grid load of the storage grid used to store the fuel assembly, and the target response data corresponding to the fuel rods in the fuel assembly; The seismic assessment of the fuel assembly based on the seismic response data includes: The reliability of the seismic response data is determined based on a second difference between the target grid load and the reference grid load of the storage grid corresponding to the fuel assembly, and a third difference between the target response data and the reference response data corresponding to the fuel rods in the fuel assembly; wherein the reference grid load and the reference response data are determined based on the seismic time history data of the reactor in the target nuclear energy conversion device. If the credibility condition indicates that the seismic response data is credible, a seismic assessment of the fuel assembly is performed based on the seismic response data.

8. The method according to claim 4, characterized in that, The seismic response data includes the maximum principal stress corresponding to the fuel assembly and the target grid load of the storage grid used to store the fuel assembly. The seismic assessment of the fuel assembly based on the seismic response data includes: If the maximum principal stress is not greater than a preset stress threshold and the target lattice load is not greater than a preset load threshold, the fuel assembly is determined to meet the seismic requirements.

9. The method according to claim 2, characterized in that, The step of conducting a seismic assessment of the fuel assembly based on the excitation time history data includes: The excitation time history data is applied to the fuel assembly simulation model corresponding to the fuel assembly to obtain the seismic assessment results of the fuel assembly.

10. A seismic assessment device for fuel assemblies, characterized in that, The device includes: The acquisition module is used to acquire seismic acceleration time history data of the area where the target nuclear energy conversion equipment is located; An assessment module is used to conduct a seismic assessment of the fuel assemblies in the target nuclear energy conversion device based on the seismic acceleration time history data.

11. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 9.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 9.

13. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 9.

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