Method and apparatus for generating reactor core power parameters, computer device, and storage medium

Abstract

A method for generating reactor core power parameters, the method comprising: acquiring calibration coefficients of detectors in a reactor core from a previous calibration cycle (S202); on the basis of the fuel assembly arrangement of the reactor core and the detector arrangement of each fuel assembly, generating a detector signal matrix, thereby facilitating subsequent expansion on the basis of the detector signal matrix and improving the efficiency of generating reactor core power parameters; according to a matrix expansion scheme matched to the detector arrangement, expanding the detector signal matrix to obtain a pseudo-detector signal matrix (S206), wherein a detection range corresponding to the pseudo-detector signal matrix is symmetrically arranged in an axial direction of the reactor core, improving computational accuracy and providing a basis for rapid computation of reactor core power parameters. By expanding the detector signal matrix to obtain the pseudo-detector signal matrix, the method achieves an axially symmetric detection range of detectors relative to the reactor core, thereby improving the measurement efficiency of reactor core parameters.

Description

Method, device, computer equipment and storage medium for generating core power parameters

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 8, 2024, with application number 202410025653.9, and invention name “Method, device, computer equipment and storage medium for generating core power parameters”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of reactor core control and safety, and in particular to a method, apparatus, computer equipment, storage medium and computer program product for generating core power parameters. Background Art

[0003] During the design and operation of a reactor, the core axial power offset (AO) and the core axial power deviation (DI) are important design and control parameters. These parameters are directly related to the difference between the axial power of the upper half of the core and the axial power of the lower half of the core.

[0004] Typically, AO and DI parameters are measured and indicated in real time using axially symmetrically arranged neutron detectors outside the reactor. With technological advancements, the use of fixed neutron detectors within the reactor is becoming increasingly widespread. Using in-core neutron detectors allows for more accurate real-time measurement and indication of AO and DI, offering significant application prospects.

[0005] However, due to the presence of axial grids within the fuel assembly, and considering the grid's neutron absorption effect, in-core neutron detectors are typically arranged asymmetrically along the axial direction. In such an asymmetric arrangement, using in-core neutron detectors to indicate parameters such as axial power offset and axial power deviation results in high computational complexity and low efficiency. Summary of the Invention

[0006] According to various embodiments of the present application, a method, apparatus, computer device, computer-readable storage medium, and computer program product are provided for quickly and accurately generating core power parameters.

[0007] A method for generating core power parameters. The method comprises:

[0008] Obtain the calibration coefficient of each detector in the core in the previous calibration cycle; generate a detector signal matrix based on the fuel assembly layout of the core and the detector layout of each fuel assembly; expand the detector signal matrix according to the matrix expansion method matched with the detector layout to obtain a pseudo-detector signal matrix, wherein the detection range corresponding to the pseudo-detector signal matrix is ​​symmetrically arranged in the axial direction of the core; generate core power parameters based on the detection signals of each detector in the detector signal matrix, the pseudo-detector signal matrix, and the calibration coefficient of the previous calibration cycle.

[0009] A device for generating core power parameters. The device comprises:

[0010] A coefficient acquisition module is used to obtain the calibration coefficient of each detector in the core in the previous calibration cycle; a matrix generation module is used to generate a detector signal matrix based on the fuel assembly layout of the core and the detector layout of each fuel assembly; a matrix expansion module is used to expand the detector signal matrix according to the matrix expansion method matched with the detector layout to obtain a pseudo-detector signal matrix, wherein the detection range corresponding to the pseudo-detector signal matrix is ​​arranged symmetrically in the axial direction of the core; a parameter generation module is used to generate core power parameters based on the detection signals of each detector in the detector signal matrix, the pseudo-detector signal matrix, and the calibration coefficient of the previous calibration cycle.

[0011] A computer device. The computer device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0012] Obtain the calibration coefficient of each detector in the core in the previous calibration cycle; generate a detector signal matrix based on the fuel assembly layout of the core and the detector layout of each fuel assembly; expand the detector signal matrix according to the matrix expansion method matched with the detector layout to obtain a pseudo-detector signal matrix, wherein the detection range corresponding to the pseudo-detector signal matrix is ​​symmetrically arranged in the axial direction of the core; generate core power parameters based on the detection signals of each detector in the detector signal matrix, the pseudo-detector signal matrix, and the calibration coefficient of the previous calibration cycle.

[0013] A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the following steps:

[0014] Obtain the calibration coefficient of each detector in the core in the previous calibration cycle; generate a detector signal matrix based on the fuel assembly layout of the core and the detector layout of each fuel assembly; expand the detector signal matrix according to the matrix expansion method matched with the detector layout to obtain a pseudo-detector signal matrix, wherein the detection range corresponding to the pseudo-detector signal matrix is ​​symmetrically arranged in the axial direction of the core; generate core power parameters based on the detection signals of each detector in the detector signal matrix, the pseudo-detector signal matrix, and the calibration coefficient of the previous calibration cycle.

[0015] A computer program product. The computer program product includes a computer program, which, when executed by a processor, implements the following steps:

[0016] Obtain the calibration coefficient of each detector in the core in the previous calibration cycle; generate a detector signal matrix based on the fuel assembly layout of the core and the detector layout of each fuel assembly; expand the detector signal matrix according to the matrix expansion method matched with the detector layout to obtain a pseudo-detector signal matrix, wherein the detection range corresponding to the pseudo-detector signal matrix is ​​symmetrically arranged in the axial direction of the core; generate core power parameters based on the detection signals of each detector in the detector signal matrix, the pseudo-detector signal matrix, and the calibration coefficient of the previous calibration cycle.

[0017] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] FIG1 is a diagram illustrating an application environment of a method for generating core power parameters in one embodiment;

[0020] FIG2 is a schematic flow chart of a method for generating core power parameters in one embodiment;

[0021] FIG3 is a schematic diagram of matrix expansion in one embodiment;

[0022] FIG4 is a flow chart of a method for obtaining calibration coefficients of a previous calibration cycle in one embodiment;

[0023] FIG5 is a schematic flow chart of a method for generating an axial expansion matrix in one embodiment;

[0024] FIG6 is a flow chart of a method for generating calibration coefficients for a previous calibration cycle in one embodiment;

[0025] FIG7 is a schematic flow chart of a method for generating core power parameters in one embodiment;

[0026] FIG8 is a schematic flow chart of a method for obtaining a core axial power offset according to an embodiment;

[0027] FIG9 is a structural block diagram of a device for generating core power parameters in one embodiment;

[0028] FIG10 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0030] The method for generating core power parameters provided in an embodiment of the present application can be applied in the application environment shown in FIG1 . In particular, the core monitoring terminal 102 communicates with the core signal processing terminal 104 . A data storage system can store data to be processed by the core signal processing terminal 104 . The data storage system can be integrated with the core signal processing terminal 104 or placed on a cloud or other network server.

[0031] The core signal processing end 104 regularly obtains the calibration coefficient of each detector in the core in the previous calibration cycle from the core monitoring end 102. The core signal processing end 104 generates a detector signal matrix based on the fuel assembly layout of the core and the axial layout of the detectors of each fuel assembly. The core signal processing end 104 expands the detector signal matrix according to the matrix expansion method matched with the detector layout to obtain a pseudo-detector signal matrix, wherein the detection range corresponding to the pseudo-detector signal matrix is ​​symmetrically arranged in the axial direction of the core. The core signal processing end 104 generates core power parameters based on the detection signals of each detector in the detector signal matrix, the pseudo-detector signal matrix, and the calibration coefficient of the previous calibration cycle.

[0032] The core monitoring terminal 102 may be a core monitoring cabinet or other terminal equipment capable of converting electrical signals, such as an electrical cabinet equipped with an analog signal module. The core signal processing terminal 104 may be a core signal processing cabinet or other terminal equipment capable of processing analog signals.

[0033] In one embodiment, as shown in FIG2 , a method for generating core power parameters is provided. The method is described by taking the application of the method to the core signal processing end in FIG1 as an example, and includes:

[0034] S202, obtaining the calibration coefficient of each detector in the core in the previous calibration cycle.

[0035] Among them, the core is fully called the nuclear reactor core, also known as the reactor active area, which is composed of fuel assemblies with a certain grid. The fuel assemblies are made of fuel elements of a certain shape (plate, rod, tube) through various components and assembled according to a certain grid arrangement to meet the requirements of core physics and thermal hydraulics.

[0036] The reactor core includes multiple fuel assemblies. Because the real-time power generated by these assemblies varies, it's necessary to monitor the power of each fuel assembly. Specifically, multiple detectors are placed at each fuel assembly within the core. For a single fuel assembly, the power generated at different axial positions varies, necessitating the placement of multiple detectors at different axial positions.

[0037] The calibration cycle is the period during which the detector calibration coefficient is valid. The calibration coefficient needs to be updated after each operating cycle. The calibration coefficient represents the coefficient used to calibrate the detector's placement and electrical signal strength. Based on this calibration coefficient, more accurate core power parameters can be obtained.

[0038] Specifically, the core power is calibrated according to the calibration coefficient to obtain the calibrated core power. For example, the core power is multiplied by the calibration coefficient to obtain the calibrated core power. The calibration coefficient can be divided into an upper calibration coefficient and a lower calibration coefficient. Specifically, the calibrated upper core power is obtained according to the upper calibration coefficient and the upper core power, and the calibrated lower core power is obtained according to the lower calibration coefficient and the lower core power. The core power parameter can be obtained based on the calibrated upper core power and the calibrated lower core power.

[0039] The calibration coefficients can be calibrated based on the power measured by each detector in the fuel assembly. Specifically, they can be the detection signals of each pseudo-detector in the fuel assembly, for example, a pseudo-detector signal matrix. For example, if the calibration object is the power measured by all detectors in the core, a calibration coefficient matrix corresponding to the calibration coefficients can be established. The power of all detectors in the core can then be calibrated based on the calibration coefficient matrix to obtain the core power parameters.

[0040] The calibration coefficients of the detector in the previous cycle can be obtained in advance and used in the calibration cycle of the current detector, which reduces the calculation cost and improves the calculation efficiency.

[0041] S204: Generate a detector signal matrix based on the arrangement of the fuel assemblies in the core and the axial arrangement of the detectors of each fuel assembly.

[0042] Among them, since the detectors on the fuel assemblies in the core are generally arranged asymmetrically, that is, in the axial direction of the fuel assembly, due to the position restrictions of multiple grids of the fuel assembly, the detectors generally cannot be arranged in a completely symmetrical state in the axial direction of the fuel assembly.

[0043] The reactor core comprises multiple fuel assemblies, some of which have multiple detectors arranged axially. These detectors are used to detect and indicate the power generated by the fuel assemblies. Specifically, these detectors are typically self-powered neutron detectors or fission chamber neutron detectors. Neutron detectors detect neutrons by ionizing gases with charged particles generated by neutrons interacting with the detector's sensitive material, or by activating the material itself after neutron irradiation.

[0044] It should be noted that the output of a neutron detector can be a detection signal, such as a detection current or voltage. The detection signal represents the product of the neutron flux density at the detector location and the corresponding reaction cross section. More specifically, there is a certain correspondence between the detector signal and power. By analyzing the detection signals of each detector, the core power parameters can be obtained.

[0045] To facilitate the calibration of the signals of each detector, a detector signal matrix is ​​generated based on the fuel assembly layout of the core and the detector layout of each fuel assembly. For example, taking a core including three fuel assemblies and three detectors arranged in each fuel assembly as an example, a 3×3 detector signal matrix is ​​generated.

[0046] The number of detectors corresponding to each fuel assembly may be an odd number, for example, the number of detectors corresponding to each fuel assembly is 7.

[0047] S206 , expanding the detector signal matrix according to the matrix expansion method matched with the detector arrangement to obtain a pseudo detector signal matrix.

[0048] Among them, the detection range corresponding to the pseudo-detector signal matrix is ​​arranged symmetrically on the core, which reduces the calculation difficulty and provides a basis for quickly calculating the core power parameters.

[0049] The matrix expansion method refers to expanding the detector signal matrix, for example, expanding the detector signal matrix according to a coefficient matrix. The expansion method includes: expanding the size of the detector signal matrix after expansion, expanding the number of rows of the detector signal matrix, expanding the number of columns of the detector signal matrix, etc.

[0050] Specifically, the coefficient matrix detector signal matrix can be expanded to obtain a pseudo detector signal matrix.

[0051] The number of rows of the pseudo-detector signal matrix represents the number of pseudo-detectors corresponding to each fuel assembly, and the number of columns of the pseudo-detector signal matrix represents the number of fuel assemblies contained in the core.

[0052] It should be noted that the detection range of the pseudo-detectors is symmetrically arranged along the core axis to ensure axial power detection of each fuel assembly in the core. Pseudo-detectors are not real detectors, but rather abstracted detectors created using a specific method. To facilitate real-time monitoring of the core's axial power distribution, the number of pseudo-detectors in a fuel assembly is typically an even number, for example, 2, 4, or 6.

[0053] Specifically, as shown in the schematic diagram of matrix expansion in Figure 3, the left side represents the detector signal matrix. Each column in the detector signal matrix can be considered as multiple detectors on a fuel assembly, and multiple detectors on a fuel assembly are generally arranged asymmetrically. The right side represents the pseudo-detector signal matrix. Each column in the pseudo-detector signal matrix can be considered as multiple pseudo-detectors on a fuel assembly, and multiple pseudo-detectors on a fuel assembly are generally arranged symmetrically. The detection range corresponding to the pseudo-detector signal matrix is ​​arranged symmetrically along the core axis.

[0054] S208 , generating core power parameters according to the detection signals of each detector in the detector signal matrix, the pseudo detector signal matrix, and the calibration coefficients of the previous calibration cycle.

[0055] The detection signal of each detector in the detector signal matrix may be a detection current or a detection voltage.

[0056] Specifically, the pseudo-detector signal matrix is ​​multiplied by the matrix corresponding to the calibration coefficient of the previous calibration cycle to obtain the matrix multiplication result. The upper core power and the lower core power are obtained based on the matrix multiplication result and the detection signal of each detector in the detector signal matrix.

[0057] Among them, the core power parameter can be the core axial power offset (AO), which is an important design and control parameter. The parameter is expressed as the ratio of the difference between the axial upper half power of the core and the axial lower half power of the core to the total core power.

[0058] Among them, the core power parameter can also be the core axial power deviation (DI), which represents the difference in power between the upper and lower parts of the core. Specifically, the core axial power deviation can be obtained by multiplying the relative power level and the core axial power offset.

[0059] In the above-mentioned method for generating core power parameters, the calibration coefficients of each detector in the core in the previous calibration cycle are obtained, and a detector signal matrix is ​​generated according to the fuel assembly layout of the core and the detector layout of each fuel assembly, so as to facilitate subsequent expansion according to the detector signal matrix and improve the efficiency of generating core power parameters. According to the matrix expansion method matched with the detector layout, the detector signal matrix is ​​expanded to obtain a pseudo-detector signal matrix, wherein the detection range corresponding to the pseudo-detector signal matrix is ​​symmetrically arranged in the axis of the core, thereby improving the calculation accuracy and providing a basis for quickly calculating the core power parameters. This method, on the one hand, expands the detector signal matrix, obtains the pseudo-detector signal matrix, obtains the detection range of the detector symmetrical to the axis of the core, thereby improving the detection accuracy of the core parameters. On the other hand, according to the detection signal of each detector in the detector signal matrix, the pseudo-detector signal matrix, and the calibration coefficient of the previous calibration cycle, the core power parameters are generated, which can quickly convert the detector's measurement signal into the core power parameter, ensuring the measurement accuracy of the core parameter while reducing the calculation time of the core power parameter.

[0060] In one embodiment, the flowchart of the method for obtaining the calibration coefficients of the previous calibration cycle as shown in FIG4 includes:

[0061] S402: Acquire a historical detector signal matrix and a detection signal of the detector.

[0062] The difference between the historical detector signal matrix and the detector signal matrix can be the magnitude of the signals output by the detectors in the matrix. That is, the historical detector signal matrix is ​​the detector signal matrix within the previous calibration cycle. Generally speaking, the positions and number of detectors are relatively fixed, that is, the number of rows and columns in the historical detector signal matrix and the detector signal matrix are equal.

[0063] The detection signal of the detector can be a signal of the current output by the detector through the charged particles captured within the detection range. The detection signal of the detector can represent the power generated by the fuel assembly within the detection range and its changes.

[0064] Specifically, it is assumed that the core includes N fuel assemblies, of which M fuel assemblies are equipped with detectors. For one fuel assembly, I detector is arranged in the axial direction of the fuel assembly. Thus, the detector signal matrix d of the history of multiple detectors in the core is constructed. M×I , the detection signal of each detector in the matrix is ​​expressed as d(m,i), where m=1,2,...,M,i=1,2,...,I.

[0065] S404: Establish a matrix relationship according to the historical detector signal matrix and the detection signal of the detector.

[0066] The detection signal φ(z) of the detector, where z represents the axial position of the detector on the fuel assembly. More specifically, z represents the axial position of the detection point in the detection range of the detector on the fuel assembly. For example, φ(0) can represent the power detected by the first detector at the bottom of the fuel assembly.

[0067] The matrix relationship represents the correlation between the detector signal and the historical detector signal matrix. This correlation can be used to expand the historical detector signal matrix and improve the accuracy of the generated core power parameters.

[0068] S406: Obtain an axial expansion matrix according to the preset number of pseudo detectors, the matrix relationship, and the sensitive section length of the detector on the fuel assembly.

[0069] Among them, the preset number of pseudo-detectors can be determined according to the number of detectors of the fuel assembly. For example, when the number of detectors of the fuel assembly is 3, the preset number of pseudo-detectors is greater than 3, and the preset number of pseudo-detectors is an even number, which can be 4, 6, 8, etc.

[0070] The matrix relationship represents the correlation between the detection signal of the detector and the historical detector signal matrix. Specifically, the matrix relationship can be a coefficient matrix B.

[0071] The length of the sensitive section of the detector on the fuel assembly is the detection range of the detector.

[0072] The axial expansion matrix represents the relationship between the historical detector signal matrix and the historical pseudo-detector signal matrix. Specifically, the historical detector signal matrix is ​​transformed according to the axial expansion matrix to obtain the historical pseudo-detector signal matrix.

[0073] S408: According to the rated power of the core, the axial expansion matrix and the historical detector signal matrix are converted to obtain the calibration coefficient of the previous calibration cycle.

[0074] The core calibrated power may be the power of the core in the previous calibration cycle.

[0075] Specifically, the core calibrated power includes the upper core power and the lower core power, and the calibration coefficients from the previous calibration cycle include the upper calibration coefficient and the lower calibration coefficient. The upper calibration coefficient is obtained by transforming the axial expansion matrix and the historical detector signal matrix according to the upper core power. The lower calibration coefficient is obtained by transforming the axial expansion matrix and the historical detector signal matrix according to the lower core power.

[0076] In this embodiment, an axial expansion matrix is ​​derived based on the preset number of pseudo-detectors, a matrix relationship, and the sensitive segment lengths of the detectors on the fuel assemblies. The axial expansion matrix and the historical detector signal matrix are then converted according to the rated power of the core to obtain the calibration coefficients for the previous calibration cycle. Obtaining accurate calibration coefficients for the previous calibration cycle facilitates expanding the detector signal matrix and obtaining the pseudo-detector signal matrix, thereby increasing the detector's detection range within the core and, in turn, improving the accuracy of core parameter measurements.

[0077] In one embodiment, as shown in FIG5 , which is a flow chart of a method for generating an axial expansion matrix, the steps of obtaining the axial expansion matrix according to a preset number of pseudo detectors, a matrix relationship, and the sensitive section lengths of the detectors on the fuel assembly include:

[0078] S502, extracting coefficients from the matrix relational expression to obtain a coefficient matrix of the matrix relational expression.

[0079] Among them, a matrix relationship is established between the detector's detection signal φ(z) and the detector's detection signal axial distribution d(m, i). The matrix relationship expression is as follows:

[0080] Among them, z i，top represents the height position of the top of the sensitive section of the i-th detector in the fuel assembly, z i，bot represents the height position of the bottom of the sensitive section of the i-th detector in the fuel assembly, m represents that the fuel assembly where the detector is located is the m-th fuel assembly among all fuel assemblies, and i represents that the detector is the i-th detector among all detectors in the fuel assembly where the detector is located.

[0081] It should be noted that the corresponding extreme position function values ​​in the detector signal φ(z) are all 0. - )=0 φ(H+z + )=0

[0082] Wherein, 0 and H are the bottom height and top height of the axial active section of the core. It is understood that the active section can also include an extrapolated distance, that is, a certain distance z below the bottom height of the active section. - A certain distance z above the top of the active segment + , the detector signal within the extrapolated distance range is zero.

[0083] Extract the coefficients in the matrix relationship expression to obtain the coefficient matrix B I×(I+2) , the corresponding inverse matrix of the coefficient matrix is ​​B -1 .

[0084] S504 , performing polynomial expansion on the detection signal of the detector to obtain a signal polynomial of the detector.

[0085] The detection signal φ(z) of the detector is expanded polynomially to obtain the signal polynomial P of the detector.

[0086] Specifically, the detection signal φ(z) of the detector can be expanded polynomially according to the Legendre polynomial, as shown below:

[0087] Wherein, z is the axial height variable, P is the detector signal polynomial, a is the expansion coefficient, and j is the expansion order. Specifically, the detector signal polynomial can be expanded by orthogonal basis functions according to the expansion order and expansion coefficient.

[0088] S506 , obtaining an axial expansion matrix according to the detector signal polynomial, the coefficient matrix of the matrix relationship, the preset number of pseudo detectors, and the sensitive section length of the detector on the fuel assembly.

[0089] Among them, according to the detector signal polynomial P, the coefficient matrix of the matrix relationship (B I×(I+2) and B -1 ), the preset number K of pseudo detectors, and the sensitive section length L of the detector on the fuel assembly, the axial expansion matrix C(i, k) is expressed as follows:

[0090] Among them, B -1 is the inverse matrix of the coefficient matrix of the matrix relationship.

[0091] In this embodiment, the coefficients in the matrix relationship are extracted to obtain the coefficient matrix of the matrix relationship, and the detection signal of the detector is expanded polynomially to obtain the signal polynomial of the detector. According to the signal polynomial of the detector, the coefficient matrix of the matrix relationship, the preset number of pseudo-detectors, and the sensitive section length of the detector on the fuel assembly, the axial expansion matrix is ​​obtained, which facilitates the expansion of the detector signal matrix according to the axial expansion matrix to obtain the pseudo-detector signal matrix, thereby improving the detection range of the detector to the core and thereby improving the measurement accuracy of the core parameters.

[0092] In one embodiment, as shown in FIG6 , which is a flow chart of a method for generating calibration coefficients for a previous calibration cycle, the calibration coefficients for the previous calibration cycle include an upper calibration coefficient and a lower calibration coefficient, and the calibration power includes an upper calibration power and a lower calibration power. The steps of converting the axial expansion matrix and the historical detector signal matrix according to the calibration power of the core to obtain the calibration coefficients for the previous calibration cycle include:

[0093] S602 : Generate a historical pseudo detector signal matrix according to the axial expansion matrix and the historical detector signal matrix.

[0094] Among them, according to the axial expansion matrix C(i, k)

[0095] The historical detector signal matrix d(m, i) is combined with the historical detector signal matrix to generate the historical pseudo detector signal matrix D(m, k). Here, m represents the fuel assembly where the detector is located, which is the mth fuel assembly among all fuel assemblies, and i represents the ith detector among all detectors in the fuel assembly where the detector is located.

[0096] The calibration coefficient of the previous calibration cycle includes an upper calibration coefficient and a lower calibration coefficient, and the calibrated power includes an upper calibrated power and a lower calibrated power.

[0097] S604 , dividing the historical pseudo detector signal matrix according to the preset number of pseudo detectors to obtain an upper pseudo detector signal matrix and a lower pseudo detector signal matrix.

[0098] Among them, the preset number K of pseudo-detectors can be determined according to the number of detectors of the fuel assembly. For example, when the number of detectors of the fuel assembly is 3, the preset number of pseudo-detectors is greater than 3, and the preset number of pseudo-detectors is an even number, which can be 4, 6, 8, etc.

[0099] Specifically, according to the preset number of pseudo-detectors, the historical pseudo-detector signal matrix is ​​divided to obtain an upper pseudo-detector signal matrix and a lower pseudo-detector signal matrix, including: dividing the historical pseudo-detector signal matrix of the 1st to K / 2nd pseudo-detectors to obtain the lower pseudo-detector signal matrix, and dividing the historical pseudo-detector signal matrix of the K / 2+1st to Kth pseudo-detectors to obtain the upper pseudo-detector signal matrix.

[0100] S606: Generate an upper calibration coefficient according to the upper calibration power and the upper pseudo detector signal matrix.

[0101] Among them, the upper calibration coefficient g is generated according to the upper calibration power PT and the upper pseudo detector signal matrix D(m, k) T (m, k), the upper calibration coefficient can be in matrix form, where

[0102] g T (m, k) = P T / D(m, k)

[0103] Where, k=K / 2+1,…,K.

[0104] S608: Generate a lower calibration coefficient according to the lower calibration power and the lower pseudo detector signal matrix.

[0105] Among them, according to the lower calibration power P B and the pseudo-detector signal matrix D(m, k) at the bottom to generate the lower calibration coefficient g B (m, k), the lower calibration coefficient can be in matrix form, where

[0106] g B (m, k) = P B / D(m, k)

[0107] Wherein, k = 1, 2,…, K / 2.

[0108] In this embodiment, a historical pseudo-detector signal matrix is ​​generated based on the axial expansion matrix and the historical detector signal matrix. The historical pseudo-detector signal matrix is ​​divided according to the preset number of pseudo-detectors to obtain an upper pseudo-detector signal matrix and a lower pseudo-detector signal matrix. An upper calibration coefficient is generated based on the upper calibration power and the upper pseudo-detector signal matrix. A lower calibration coefficient is generated based on the lower calibration power and the lower pseudo-detector signal matrix. This facilitates the expansion of the detector signal matrix according to the axial expansion matrix to obtain the pseudo-detector signal matrix, thereby improving the detection range of the detector to the core and thereby improving the measurement accuracy of the core parameters.

[0109] In one embodiment, the step of generating a detector signal matrix based on the fuel assembly layout of the core and the detector layout of each fuel assembly includes: obtaining the layout position of each fuel assembly in the core and the layout position of each detector in the fuel assembly, and generating a detector signal matrix based on the detection signal of each detector, the layout position of each fuel assembly and the layout position of each detector.

[0110] The layout positions of each fuel assembly in the core represent the core fuel assembly layout, and the layout positions of each detector in the fuel assembly represent the detector layout of each fuel assembly.

[0111] Specifically, after obtaining the arrangement of the core fuel assemblies and the arrangement of the detectors of each fuel assembly, it is also necessary to obtain the output signal of each detector in the arrangement, that is, to obtain the detection signal of each detector.

[0112] The output signal of the detector is usually a continuous analog signal, such as a current or voltage change value.

[0113] Specifically, a detector signal matrix is ​​generated according to the output signals of the detectors, the arrangement positions of the fuel assemblies, and the arrangement positions of the detectors.

[0114] In this embodiment, an accurate detector signal matrix is ​​obtained based on the detection signals of each detector, the layout positions of each fuel assembly and the layout positions of each detector, which facilitates the expansion of the detector signal matrix according to the axial expansion matrix to obtain a pseudo-detector signal matrix, thereby improving the detection range of the detector to the core and thereby improving the measurement accuracy of the core parameters.

[0115] In one embodiment, as shown in FIG7 , which is a flow chart of a method for generating core power parameters, the calibration coefficients of the previous calibration cycle include upper calibration coefficients and lower calibration coefficients. The steps of generating the core power parameters based on the detection signals of each detector in the detector signal matrix, the pseudo-detector signal matrix, and the calibration coefficients of the previous calibration cycle include:

[0116] S702: Obtain an upper indicated power according to the pseudo detector signal matrix, the detection signal of each detector in the detector signal matrix, and the upper calibration coefficient.

[0117] The upper indicated power represents the total power of the upper part of the core.

[0118] Specifically, according to the pseudo detector signal matrix D′(m, k), the detection signal φ(z) of each detector in the detector signal matrix, and the upper calibration coefficient g T (m, k), get the upper indicated power P' T The upper part indicates the power P′ T The expression is as follows:

[0119] Among them, φ(z) can be regarded as the pseudo detector signal matrix D′(m, k) and the upper calibration coefficient g T The element value of the element in the matrix corresponding to (m, k).

[0120] S704: Obtain the lower indicated power according to the pseudo detector signal matrix, the detection signal of each detector in the detector signal matrix, and the lower calibration coefficient.

[0121] The lower indicated power represents the total power of the lower part of the core.

[0122] Specifically, according to the pseudo detector signal matrix D′(m, k), the detection signal φ(z) of each detector in the detector signal matrix, and the lower calibration coefficient g B (m, k), get the lower indicated power P' B .

[0123] Among them, φ(z) can be regarded as the pseudo detector signal matrix D′(m, k) and the upper calibration coefficient g B The element value of the element in the matrix corresponding to (m, k).

[0124] S706: Generate core power parameters according to the upper indicated power and the lower indicated power.

[0125] The core power parameter may be the core axial power offset (AO). The core axial power offset expression is:

[0126] Among them, the core power parameter can also be the core axial power deviation, which represents the difference in power between the upper and lower parts of the core. Specifically, the core axial power deviation can be obtained by multiplying the relative power level and the core axial power offset AO.

[0127] In this embodiment, the upper indicated power is obtained based on the pseudo-detector signal matrix, the detection signal of each detector in the detector signal matrix, and the upper calibration coefficient. The lower indicated power is obtained based on the pseudo-detector signal matrix, the detection signal of each detector in the detector signal matrix, and the lower calibration coefficient. Based on the upper indicated power and the lower indicated power, accurate core power parameters are generated.

[0128] In one embodiment, as shown in FIG8 , a method for obtaining a core axial power offset is provided, including:

[0129] S802: Acquire a historical detector signal matrix and a detection signal of the detector.

[0130] S804: Establish a matrix relationship according to the historical detector signal matrix and the detection signal of the detector.

[0131] S806, extracting coefficients from the matrix relational expression to obtain a coefficient matrix of the matrix relational expression.

[0132] S808 , performing polynomial expansion on the detection signal of the detector to obtain a signal polynomial of the detector.

[0133] S810 , obtaining an axial expansion matrix according to the detector signal polynomial, the coefficient matrix of the matrix relationship, the preset number of pseudo detectors, and the sensitive section length of the detector on the fuel assembly.

[0134] S812: Generate a historical pseudo detector signal matrix according to the axial expansion matrix and the historical detector signal matrix.

[0135] S814 , dividing the historical pseudo detector signal matrix according to the preset number of pseudo detectors to obtain an upper pseudo detector signal matrix and a lower pseudo detector signal matrix.

[0136] S816: Generate an upper calibration coefficient according to the upper calibration power and the upper pseudo detector signal matrix.

[0137] S818: Generate a lower calibration coefficient according to the lower calibration power and the lower pseudo detector signal matrix.

[0138] S820: Obtain the layout position of each fuel assembly in the core and the layout position of each detector in the fuel assembly.

[0139] S822: Generate a detector signal matrix based on the detection signals of the detectors, the layout positions of the fuel assemblies, and the layout positions of the detectors.

[0140] S824, expanding the detector signal matrix according to the matrix expansion method matched with the detector arrangement to obtain a pseudo detector signal matrix.

[0141] The detection range corresponding to the pseudo-detector signal matrix is ​​arranged symmetrically along the core axis.

[0142] S826, obtaining an upper indicated power according to the pseudo detector signal matrix, the detection signal of each detector in the detector signal matrix, and the upper calibration coefficient.

[0143] S828, obtaining the lower indicated power according to the pseudo detector signal matrix, the detection signal of each detector in the detector signal matrix, and the lower calibration coefficient.

[0144] S830: Generate core power parameters according to the upper indicated power and the lower indicated power.

[0145] In this embodiment, the calibration coefficients of each detector in the core in the previous calibration cycle are obtained, and a detector signal matrix is ​​generated based on the fuel assembly layout of the core and the detector layout of each fuel assembly, so as to facilitate subsequent expansion based on the detector signal matrix and improve the efficiency of generating core power parameters. According to the matrix expansion method matched with the detector layout, the detector signal matrix is ​​expanded to obtain a pseudo-detector signal matrix, wherein the detection range corresponding to the pseudo-detector signal matrix is ​​arranged symmetrically in the axis of the core, thereby improving the calculation accuracy and providing a basis for quickly calculating the core power parameters. This method, on the one hand, expands the detector signal matrix to obtain the pseudo-detector signal matrix, obtains the detection range of the detector symmetrically with respect to the axis of the core, thereby improving the detection accuracy of the core parameters. On the other hand, based on the detection signals of each detector in the detector signal matrix, the pseudo-detector signal matrix, and the calibration coefficients of the previous calibration cycle, the core power parameters are generated, and the detector measurement signals can be quickly converted into the core power parameters, ensuring the measurement accuracy of the core parameters while reducing the calculation time of the core power parameters. This method can effectively deal with the problem of complex AO and DI calculations introduced by the inability to arrange the neutron detectors in the core symmetrically in the axis. Through the preset axial expansion matrix, the asymmetric measured data can be conveniently expanded into the pseudo-detector measurement data of the axial core. These pseudo-detectors are symmetrically arranged in the axial direction of the core. This application has low requirements for storage and calculation. In addition to the detector measurement data, only the axial expansion matrix, pseudo-detector measurement signal and calibration coefficient are additionally introduced. The axial expansion matrix is ​​a preset value, and the calibration coefficient can remain unchanged for a long time period, which is simple to calculate.

[0146] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0147] Based on the same inventive concept, embodiments of the present application also provide a core power parameter generation device for implementing the aforementioned core power parameter generation method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more core power parameter generation device embodiments provided below can be found in the limitations of the core power parameter generation method described above and will not be further elaborated here.

[0148] In one embodiment, as shown in FIG9 , a device for generating core power parameters is provided, including: a coefficient acquisition module 902 , a matrix generation module 904 , a matrix expansion module 906 , and a parameter generation module 908 , wherein:

[0149] The coefficient acquisition module 902 is used to obtain the calibration coefficient of each detector in the core in the previous calibration cycle;

[0150] A matrix generation module 904 is configured to generate a detector signal matrix based on the fuel assembly layout of the core and the detector layout of each fuel assembly;

[0151] A matrix expansion module 906 is configured to expand the detector signal matrix according to the matrix expansion method matched with the detector arrangement to obtain a pseudo detector signal matrix, wherein the pseudo detector signal matrix is ​​arranged symmetrically along the core axis.

[0152] The parameter generation module 908 is used to generate core power parameters based on the detection signals of each detector in the detector signal matrix, the pseudo detector signal matrix, and the calibration coefficients of the previous calibration cycle.

[0153] In one embodiment, the coefficient acquisition module 902 is also used to obtain the historical detector signal matrix and the detection signal of the detector; establish a matrix relationship according to the historical detector signal matrix and the detection signal of the detector; obtain the axial expansion matrix according to the preset number of pseudo-detectors, the matrix relationship and the sensitive section length of the detector on the fuel assembly; convert the axial expansion matrix and the historical detector signal matrix according to the calibrated power of the core to obtain the calibration coefficient of the previous calibration cycle.

[0154] In one embodiment, the coefficient acquisition module 902 is also used to extract coefficients in the matrix relationship to obtain a coefficient matrix of the matrix relationship; perform a polynomial expansion on the detection signal of the detector to obtain a signal polynomial of the detector; and obtain an axial expansion matrix based on the signal polynomial of the detector, the coefficient matrix of the matrix relationship, the preset number of pseudo-detectors, and the sensitive section length of the detector on the fuel assembly.

[0155] In one embodiment, the coefficient acquisition module 902 is also used to generate a historical pseudo-detector signal matrix based on the axial expansion matrix and the historical detector signal matrix; divide the historical pseudo-detector signal matrix according to a preset number of pseudo-detectors to obtain an upper pseudo-detector signal matrix and a lower pseudo-detector signal matrix; generate an upper calibration coefficient based on the upper calibration power and the upper pseudo-detector signal matrix; and generate a lower calibration coefficient based on the lower calibration power and the lower pseudo-detector signal matrix.

[0156] In one embodiment, the matrix generation module 904 is further used to obtain the layout position of each fuel assembly in the core and the layout position of each detector in the fuel assembly; and generate a detector signal matrix based on the detection signal of each detector, the layout position of each fuel assembly and the layout position of each detector.

[0157] In one embodiment, the parameter generation module 908 is also used to obtain the upper indicated power based on the pseudo-detector signal matrix, the detection signal of each detector in the detector signal matrix, and the upper calibration coefficient; obtain the core indicated power based on the pseudo-detector signal matrix, the detection signal of each detector in the detector signal matrix, and the lower calibration coefficient; and generate the core power parameters based on the upper indicated power and the core indicated power.

[0158] Each module in the apparatus for generating core power parameters can be implemented in whole or in part through software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in the computer device in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0159] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be shown in Figure 10. The computer device includes a processor, a memory, an input / output interface (I / O), and a communication interface. The processor, memory, and I / O interface are connected via a system bus, and the communication interface is connected to the system bus via the I / O interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device is used to store core power parameter data. The I / O interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a method for generating core power parameters is implemented.

[0160] Those skilled in the art will understand that the structure shown in FIG10 is merely a block diagram of a portion of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0161] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0162] The calibration coefficients of each detector in the core during the previous calibration cycle are obtained; a detector signal matrix is ​​generated based on the fuel assembly layout of the core and the detector layout of each fuel assembly; the detector signal matrix is ​​expanded according to the matrix expansion method matched with the detector layout to obtain a pseudo-detector signal matrix, wherein the detection range corresponding to the pseudo-detector signal matrix is ​​arranged symmetrically in the axis direction of the core; the core power parameters are generated based on the detection signals of each detector in the detector signal matrix, the pseudo-detector signal matrix, and the calibration coefficients of the previous calibration cycle.

[0163] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0164] Obtain the historical detector signal matrix and the detector's detection signal; establish a matrix relationship based on the historical detector signal matrix and the detector's detection signal; obtain the axial expansion matrix based on the preset number of pseudo-detectors, the matrix relationship, and the sensitive section length of the detector on the fuel assembly; convert the axial expansion matrix and the historical detector signal matrix according to the calibrated power of the core to obtain the calibration coefficient of the previous calibration cycle.

[0165] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0166] The coefficients in the matrix relationship are extracted to obtain a coefficient matrix of the matrix relationship; the detection signal of the detector is expanded polynomially to obtain a signal polynomial of the detector; and the axial expansion matrix is ​​obtained according to the signal polynomial of the detector, the coefficient matrix of the matrix relationship, the preset number of pseudo-detectors, and the sensitive section length of the detector on the fuel assembly.

[0167] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0168] According to the axial expansion matrix and the historical detector signal matrix, a historical pseudo-detector signal matrix is ​​generated; according to the preset number of pseudo-detectors, the historical pseudo-detector signal matrix is ​​divided to obtain an upper pseudo-detector signal matrix and a lower pseudo-detector signal matrix; according to the upper calibration power and the upper pseudo-detector signal matrix, an upper calibration coefficient is generated; according to the lower calibration power and the lower pseudo-detector signal matrix, a lower calibration coefficient is generated.

[0169] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0170] The arrangement position of each fuel assembly in the reactor core and the arrangement position of each detector in the fuel assembly are obtained; and a detector signal matrix is ​​generated according to the detection signal of each detector, the arrangement position of each fuel assembly and the arrangement position of each detector.

[0171] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0172] The upper indicated power is obtained based on the pseudo-detector signal matrix, the detection signals of each detector in the detector signal matrix, and the upper calibration coefficient; the core indicated power is obtained based on the pseudo-detector signal matrix, the detection signals of each detector in the detector signal matrix, and the lower calibration coefficient; and the core power parameters are generated based on the upper indicated power and the core indicated power.

[0173] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0174] The calibration coefficients of each detector in the core during the previous calibration cycle are obtained; a detector signal matrix is ​​generated based on the fuel assembly layout of the core and the detector layout of each fuel assembly; the detector signal matrix is ​​expanded according to the matrix expansion method matched with the detector layout to obtain a pseudo-detector signal matrix, wherein the detection range corresponding to the pseudo-detector signal matrix is ​​arranged symmetrically in the axis direction of the core; the core power parameters are generated based on the detection signals of each detector in the detector signal matrix, the pseudo-detector signal matrix, and the calibration coefficients of the previous calibration cycle.

[0175] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0176] Obtain the historical detector signal matrix and the detector's detection signal; establish a matrix relationship based on the historical detector signal matrix and the detector's detection signal; obtain the axial expansion matrix based on the preset number of pseudo-detectors, the matrix relationship, and the sensitive section length of the detector on the fuel assembly; convert the axial expansion matrix and the historical detector signal matrix according to the calibrated power of the core to obtain the calibration coefficient of the previous calibration cycle.

[0177] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0178] The coefficients in the matrix relationship are extracted to obtain a coefficient matrix of the matrix relationship; the detection signal of the detector is expanded polynomially to obtain a signal polynomial of the detector; and the axial expansion matrix is ​​obtained according to the signal polynomial of the detector, the coefficient matrix of the matrix relationship, the preset number of pseudo-detectors, and the sensitive section length of the detector on the fuel assembly.

[0179] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0180] According to the axial expansion matrix and the historical detector signal matrix, a historical pseudo-detector signal matrix is ​​generated; according to the preset number of pseudo-detectors, the historical pseudo-detector signal matrix is ​​divided to obtain an upper pseudo-detector signal matrix and a lower pseudo-detector signal matrix; according to the upper calibration power and the upper pseudo-detector signal matrix, an upper calibration coefficient is generated; according to the lower calibration power and the lower pseudo-detector signal matrix, a lower calibration coefficient is generated.

[0181] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0182] The arrangement position of each fuel assembly in the reactor core and the arrangement position of each detector in the fuel assembly are obtained; and a detector signal matrix is ​​generated according to the detection signal of each detector, the arrangement position of each fuel assembly and the arrangement position of each detector.

[0183] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0184] The upper indicated power is obtained based on the pseudo-detector signal matrix, the detection signals of each detector in the detector signal matrix, and the upper calibration coefficient; the core indicated power is obtained based on the pseudo-detector signal matrix, the detection signals of each detector in the detector signal matrix, and the lower calibration coefficient; and the core power parameters are generated based on the upper indicated power and the core indicated power.

[0185] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0186] The calibration coefficients of each detector in the core during the previous calibration cycle are obtained; a detector signal matrix is ​​generated based on the fuel assembly layout of the core and the detector layout of each fuel assembly; the detector signal matrix is ​​expanded according to the matrix expansion method matched with the detector layout to obtain a pseudo-detector signal matrix, wherein the detection range corresponding to the pseudo-detector signal matrix is ​​arranged symmetrically in the axis direction of the core; the core power parameters are generated based on the detection signals of each detector in the detector signal matrix, the pseudo-detector signal matrix, and the calibration coefficients of the previous calibration cycle.

[0187] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0188] Obtain the historical detector signal matrix and the detector's detection signal; establish a matrix relationship based on the historical detector signal matrix and the detector's detection signal; obtain the axial expansion matrix based on the preset number of pseudo-detectors, the matrix relationship, and the sensitive section length of the detector on the fuel assembly; convert the axial expansion matrix and the historical detector signal matrix according to the calibrated power of the core to obtain the calibration coefficient of the previous calibration cycle.

[0189] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0190] The coefficients in the matrix relationship are extracted to obtain a coefficient matrix of the matrix relationship; the detection signal of the detector is expanded polynomially to obtain a signal polynomial of the detector; and the axial expansion matrix is ​​obtained according to the signal polynomial of the detector, the coefficient matrix of the matrix relationship, the preset number of pseudo-detectors, and the sensitive section length of the detector on the fuel assembly.

[0191] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0192] According to the axial expansion matrix and the historical detector signal matrix, a historical pseudo-detector signal matrix is ​​generated; according to the preset number of pseudo-detectors, the historical pseudo-detector signal matrix is ​​divided to obtain an upper pseudo-detector signal matrix and a lower pseudo-detector signal matrix; according to the upper calibration power and the upper pseudo-detector signal matrix, an upper calibration coefficient is generated; according to the lower calibration power and the lower pseudo-detector signal matrix, a lower calibration coefficient is generated.

[0193] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0194] The arrangement position of each fuel assembly in the reactor core and the arrangement position of each detector in the fuel assembly are obtained; and a detector signal matrix is ​​generated according to the detection signal of each detector, the arrangement position of each fuel assembly and the arrangement position of each detector.

[0195] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0196] The upper indicated power is obtained based on the pseudo-detector signal matrix, the detection signals of each detector in the detector signal matrix, and the upper calibration coefficient; the core indicated power is obtained based on the pseudo-detector signal matrix, the detection signals of each detector in the detector signal matrix, and the lower calibration coefficient; and the core power parameters are generated based on the upper indicated power and the core indicated power.

[0197] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0198] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may 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 may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0199] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, 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 specification.

[0200] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for generating core power parameters, characterized in that, The method includes: Obtaining the calibration coefficients of each detector in the core during the previous calibration period; Generating a detector signal matrix according to the fuel assembly layout in the core and the detector layout of each fuel assembly; Expanding the detector signal matrix according to the matrix expansion method matched by the detector layout to obtain a pseudo-detector signal matrix, wherein the detection range corresponding to the pseudo-detector signal matrix is symmetrically arranged axially in the core; Generating core power parameters according to the detection signals of each detector in the detector signal matrix, the pseudo-detector signal matrix, and the calibration coefficients during the previous calibration period.

2. The method according to claim 1, wherein The step of obtaining the calibration coefficients during the previous calibration period includes: Obtaining the historical detector signal matrix and the detection signals of the detectors; Establishing a matrix relation according to the historical detector signal matrix and the detection signals of the detectors; Obtaining an axial expansion matrix according to the preset number of pseudo-detectors, the matrix relation, and the sensitive section length of the detectors on the fuel assembly; Converting the axial expansion matrix and the historical detector signal matrix according to the calibrated power of the core to obtain the calibration coefficients during the previous calibration period.

3. The method according to claim 2, wherein The step of obtaining an axial expansion matrix according to the preset number of pseudo-detectors, the matrix relation, and the sensitive section length of the detectors on the fuel assembly includes: Extracting the coefficients in the matrix relation to obtain the coefficient matrix of the matrix relation; Performing polynomial expansion on the detection signals of the detectors to obtain the signal polynomial of the detectors; Obtaining an axial expansion matrix according to the signal polynomial of the detectors, the coefficient matrix of the matrix relation, the preset number of pseudo-detectors, and the sensitive section length of the detectors on the fuel assembly.

4. The method according to claim 2, wherein The calibration coefficients during the previous calibration period include upper calibration coefficients and lower calibration coefficients, and the calibrated power includes upper calibrated power and lower calibrated power; The step of converting the axial expansion matrix and the historical detector signal matrix according to the calibrated power of the core to obtain the calibration coefficients during the previous calibration period includes: Generating a historical pseudo-detector signal matrix according to the axial expansion matrix and the historical detector signal matrix; Dividing the historical pseudo-detector signal matrix according to the preset number of pseudo-detectors to obtain an upper pseudo-detector signal matrix and a lower pseudo-detector signal matrix; Generating upper calibration coefficients according to the upper calibrated power and the upper pseudo-detector signal matrix; Generating lower calibration coefficients according to the lower calibrated power and the lower pseudo-detector signal matrix.

5. The method according to claim 1, wherein The step of generating a detector signal matrix according to the fuel assembly layout in the core and the detector layout of each fuel assembly includes: Obtaining the arrangement positions of each fuel assembly in the core and the arrangement positions of each detector in the fuel assembly; Generating a detector signal matrix according to the detection signals of each detector, the arrangement positions of each fuel assembly, and the arrangement positions of each detector.

6. The method according to claim 1, wherein The calibration coefficients of the previous calibration cycle include the upper calibration coefficient and the lower calibration coefficient. The steps of generating the core power parameter according to the pseudo-detector signal matrix, the detection signals of each detector in the detector signal matrix, and the calibration coefficients of the previous calibration cycle include: Obtaining the upper indicated power according to the pseudo-detector signal matrix, the detection signals of each detector in the detector signal matrix, and the upper calibration coefficient; Obtaining the lower indicated power according to the pseudo-detector signal matrix, the detection signals of each detector in the detector signal matrix, and the lower calibration coefficient; Generating the core power parameter according to the upper indicated power and the lower indicated power.

7. A generating device for core power parameters, characterized in that The device includes: A coefficient acquisition module for acquiring the calibration coefficients of each detector in the core in the previous calibration cycle; A matrix generation module for generating a detector signal matrix according to the fuel assembly arrangement of the core and the detector arrangement of each fuel assembly; A matrix expansion module for expanding the detector signal matrix according to the matrix expansion method matched by the detector arrangement to obtain a pseudo-detector signal matrix, wherein the detection range corresponding to the pseudo-detector signal matrix is symmetrically arranged in the core axial direction; A parameter generation module for generating a core power parameter according to the detection signals of each detector in the detector signal matrix, the pseudo-detector signal matrix, and the calibration coefficients of the previous calibration cycle.

8. A computer device, comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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