Pressurized water reactor rod changing method and system, electronic equipment and computer readable storage medium

Abstract

The invention discloses a pressurized water reactor rod changing method and system, electronic equipment and a computer readable storage medium, and the method comprises the steps: obtaining a plurality of rod pre-changing strategies corresponding to a first burnup point according to a plurality of rod changing interpolation relationships of a plurality of control rods when it is monitored that the current burnup point is the first burnup point, each control rod corresponds to a rod changing interpolation relation, the rod changing interpolation relation comprises a plurality of burnup points and a rod pre-changing strategy corresponding to each burnup point, and the rod pre-changing strategy is used for indicating the pre-insertion step number of the corresponding control rod; adjusting the pre-insertion step number of each control rod according to a rod pre-changing strategy corresponding to each control rod at the first burn-up point; and rod replacement processing is carried out based on the multiple adjusted control rods. According to the invention, disturbance of the pressurized water reactor can be reduced when rod sequence exchange is carried out on the control rod.

Description

Technical Field

[0001] The present application relates to the technical field of reactor core design, and in particular to a pressurized water reactor rod replacement method, system, electronic equipment and computer-readable storage medium. Background Art

[0002] During the operation of a pressurized water reactor, as fuel is consumed and power needs to be raised or lowered, its reactivity needs to be compensated. In order to improve the speed and accuracy of reactivity compensation in the above process, a pressurized water reactor based on a rod adjustment mode is usually designed. In order to reduce the burnup shadow effect caused by the long-term insertion of control rods into the core, as well as the burnup effect of the control rods themselves, the control rod sequence needs to be exchanged.

[0003] Since multiple groups of control rods are located at different positions in the core, the degree of disturbance caused by the control rod movements to the core is also different, so synchronous movements will cause greater disturbances in the pressurized water reactor. Summary of the invention

[0004] The present application aims to provide a pressurized water reactor rod replacement method, system, electronic device and computer-readable storage medium, which can reduce the disturbance of the pressurized water reactor when the control rods are replaced in sequence.

[0005] In a first aspect, an embodiment of the present application provides a pressurized water reactor rod replacement method, the method comprising:

[0006] In the case where it is monitored that the current burnup point is the first burnup point, a plurality of pre-rod replacement strategies corresponding to the first burnup point are obtained according to a plurality of rod replacement interpolation relationships of a plurality of control rods, each control rod corresponds to a rod replacement interpolation relationship, the rod replacement interpolation relationship includes a plurality of burnup points and a pre-rod replacement strategy corresponding to each burnup point, the pre-rod replacement strategy is used to indicate the number of pre-insertion steps of the corresponding control rod;

[0007] According to the pre-rod replacement strategy corresponding to each control rod at the first burnup point, the pre-insertion step number of each control rod is adjusted;

[0008] Rod replacement processing is performed based on the adjusted multiple control rods.

[0009] In some embodiments, when it is monitored that the current burnup point is the first burnup point, before acquiring a plurality of pre-rod replacement strategies corresponding to the first burnup point according to a plurality of rod replacement interpolation relationships of a plurality of control rods, the method further comprises:

[0010] For any control rod among the plurality of control rods, a plurality of burnup points of the control rod in the whole life cycle of the pressurized water reactor and a plurality of candidate rod replacement strategies corresponding to each burnup point are obtained, wherein the candidate rod replacement strategy is used to indicate the number of pre-insertion steps of the control rod;

[0011] Calculate the evaluation result value of each candidate rod-changing strategy corresponding to each fuel consumption point;

[0012] For any one of the multiple burnup points of the control rod, according to the evaluation result value of each candidate rod replacement strategy corresponding to the burnup point, multiple candidate rod replacement strategies corresponding to the burnup point are selected to obtain a pre-rod replacement strategy corresponding to the burnup point;

[0013] According to the pre-rod replacement strategy corresponding to the burnup point, the rod replacement interpolation relationship corresponding to the control rod is constructed.

[0014] In some implementations, calculating the evaluation result value of each candidate rod-changing strategy corresponding to each burnup point includes:

[0015] Acquiring at least one evaluation parameter, the at least one evaluation parameter comprising at least one of a nuclear power fluctuation amplitude, a temperature fluctuation amplitude, an axial power offset fluctuation amplitude, a rod movement amount of the axial power offset, and a rod replacement time;

[0016] In a case where the at least one evaluation parameter includes one evaluation parameter, each candidate rod-changing strategy corresponding to the burn-up point is evaluated using the one evaluation parameter to obtain an evaluation result value of each candidate rod-changing strategy corresponding to the burn-up point;

[0017] If the at least one evaluation parameter includes multiple evaluation parameters, each of the multiple evaluation parameters is processed as follows: each candidate rod-changing strategy corresponding to the burn-up point is evaluated using the evaluation parameter to obtain a first result value of each candidate rod-changing strategy evaluated using the evaluation parameter;

[0018] For any candidate rod-changing strategy among the multiple candidate rod-changing strategies corresponding to the burn-up point, a weighted sum is performed on the first result value of each evaluation parameter evaluation corresponding to the candidate rod-changing strategy to obtain the evaluation result value of the candidate rod-changing strategy.

[0019] In some implementations, according to the evaluation result value of each candidate rod-changing strategy corresponding to the burn-up point, multiple candidate rod-changing strategies corresponding to the burn-up point are selected to obtain a pre-rod-changing strategy corresponding to the burn-up point, including:

[0020] A candidate rod-changing strategy with the largest evaluation result value is selected from multiple candidate rod-changing strategies corresponding to the burn-up point as the pre-rod-changing strategy corresponding to the burn-up point, and the evaluation result value is used to characterize the superiority of the candidate rod-changing strategy.

[0021] In some embodiments, the candidate rod-changing strategy includes an initial rod position and a number of pre-insertion steps;

[0022] According to the evaluation result value of each candidate rod-changing strategy corresponding to the burn-up point, multiple candidate rod-changing strategies corresponding to the burn-up point are selected to obtain a pre-rod-changing strategy corresponding to the burn-up point, including:

[0023] Get the current position of the control stick;

[0024] Screening each candidate rod replacement strategy corresponding to the burnup point according to the current rod position of the control rod to obtain at least one candidate rod replacement strategy, wherein the initial rod position included in the at least one candidate rod replacement strategy is the same as the current rod position of the control rod;

[0025] A candidate rod-changing strategy with the largest evaluation result value is selected from at least one candidate rod-changing strategy as the pre-rod-changing strategy corresponding to the burn-up point, and the evaluation result value is used to characterize the superiority of the candidate rod-changing strategy.

[0026] In some embodiments, the pre-rod replacement strategy includes an initial rod position, a pre-insertion step number, and an evaluation result value, and the evaluation result value is used to characterize the superiority of the pre-rod replacement strategy;

[0027] When it is monitored that the current burnup point is the first burnup point, multiple pre-rod replacement strategies corresponding to the first burnup point are obtained according to multiple rod replacement interpolation relationships of multiple control rods, including:

[0028] In the case where it is monitored that the current burn-up point is the first burn-up point, if the rod-changing interpolation relationship of the first control rod among the multiple control rods does not include the first burn-up point, and the first burn-up point is between the second burn-up point and the third burn-up point in the rod-changing interpolation relationship of the first control rod, then the target pre-rod-changing strategies corresponding to the second burn-up point and the third burn-up point are selected from the rod-changing interpolation relationship of the first control rod, wherein the evaluation result value of the target pre-rod-changing strategy corresponding to the second burn-up point is the largest among all the pre-rod-changing strategies corresponding to the second burn-up point, and the evaluation result value of the target pre-rod-changing strategy corresponding to the third burn-up point is the largest among all the pre-rod-changing strategies corresponding to the third burn-up point; or, the initial rod positions of the target pre-rod-changing strategies corresponding to the second burn-up point and the third burn-up point are both the same as the current rod position of the first control rod;

[0029] Interpolation processing is performed based on the target pre-rod replacement strategies corresponding to the second burn-up point and the third burn-up point, so as to obtain the pre-rod replacement strategy for the first control rod at the first burn-up point.

[0030] In some implementations, the interpolation process includes:

[0031] Obtain two initial rod positions from the two target rod replacement strategies, and average the two initial rod positions to obtain the initial rod position of the pre-rod replacement strategy for the first control rod at the first burnup point;

[0032] Two pre-insertion step numbers are obtained from the two target rod-changing strategies, and the two pre-insertion step numbers are summed and averaged to obtain the pre-insertion step number of the pre-rod-changing strategy for the first control rod at the first burnup point.

[0033] In a second aspect, the present application also provides a pressurized water reactor rod replacement system, the system comprising:

[0034] a pre-rod replacement strategy acquisition module, for acquiring, when monitoring that the current burn-up point is the first burn-up point, a plurality of pre-rod replacement strategies corresponding to the first burn-up point according to a plurality of rod replacement interpolation relationships of a plurality of control rods, each control rod corresponding to a rod replacement interpolation relationship, the rod replacement interpolation relationship including a plurality of burn-up points and a pre-rod replacement strategy corresponding to each burn-up point, the pre-rod replacement strategy being used to indicate the number of pre-insertion steps of the corresponding control rod;

[0035] A pre-insertion step number adjustment module, used for adjusting the pre-insertion step number of each control rod according to the pre-rod replacement strategy corresponding to each control rod at the first burnup point;

[0036] The control rod replacement processing module is used to perform rod replacement processing based on the adjusted multiple control rods.

[0037] In a third aspect, an embodiment of the present application further provides an electronic device comprising at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions executable by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute a pressurized water reactor rod replacement method as described in the first aspect.

[0038] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute a pressurized water reactor rod replacement method as described in the first aspect.

[0039] In the embodiment of the present application, when the current burn-up point is monitored to be the first burn-up point, multiple pre-rod replacement strategies corresponding to the first burn-up point are obtained according to multiple rod replacement interpolation relationships of multiple control rods, each control rod corresponds to a rod replacement interpolation relationship, the rod replacement interpolation relationship includes multiple burn-up points, and the pre-rod replacement strategy corresponding to each burn-up point, the pre-rod replacement strategy is used to indicate the pre-insertion step number of the corresponding control rod; according to the pre-rod replacement strategy corresponding to each control rod at the first burn-up point, the pre-insertion step number of each control rod is adjusted; and the rod replacement process is performed based on the adjusted multiple control rods. In this way, by first adjusting the pre-insertion step number of each control rod according to the pre-rod replacement strategy corresponding to each control rod at the first burn-up point, and then performing the rod replacement process based on the adjusted multiple control rods, the disturbance of the pressurized water reactor can be reduced when the control rods are exchanged in sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0041] Figure 1 It is a schematic flow chart of an embodiment of a pressurized water reactor rod replacement method provided by the present application;

[0042] Figure 2 It is a schematic diagram of the T-rod group stacking relationship of the best embodiment of the pressurized water reactor rod replacement method provided by the present application;

[0043] Figure 3 This is a schematic diagram of a control rod replacement process of a preferred embodiment of a pressurized water reactor rod replacement method provided by the present application;

[0044] Figure 4 It is a schematic diagram of the pre-rod insertion and rod replacement process of the best embodiment of the pressurized water reactor rod replacement method provided by the present application;

[0045] Figure 5 It is a schematic diagram of the pre-rod replacement process of the best embodiment of the pressurized water reactor rod replacement method provided by the present application;

[0046] Figure 6 It is a schematic diagram of a process flow of preparing a fuel consumption preprocessing interpolation table of a best embodiment of a pressurized water reactor rod replacement method provided by the present application;

[0047] Figure 7 It is a structural schematic diagram of an embodiment of a pressurized water reactor rod replacement system provided by the present application;

[0048] Figure 8 It is a schematic diagram of the structure of an embodiment of the electronic device provided by the present application. DETAILED DESCRIPTION

[0049] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0050] In the description of this application, if there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0051] In the description of the present application, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0052] In the description of this application, it should be noted that, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above terms in this application based on the specific content of the technical solution.

[0053] Since multiple groups of control rods are located at different positions in the core, the degree of disturbance caused by the control rod movements to the core is also different, so synchronous movements will cause greater disturbances in the pressurized water reactor.

[0054] In order to solve the problem of large disturbance in a pressurized water reactor caused by synchronous action, the present application proposes a pressurized water reactor rod replacement method, system, electronic device and computer-readable storage medium.

[0055] Reference Figure 1 , a schematic diagram of a process flow of a pressurized water reactor rod replacement method provided in an embodiment of the present application. The pressurized water reactor rod replacement method is applied to an electronic device, which may be a server or a mobile terminal. Figure 1 As shown, the pressurized water reactor rod replacement method may include the following steps:

[0056] Step 110: when it is monitored that the current burn-up point is the first burn-up point, a plurality of pre-rod-changing strategies corresponding to the first burn-up point are obtained according to a plurality of rod-changing interpolation relationships of a plurality of control rods, each control rod corresponds to a rod-changing interpolation relationship, the rod-changing interpolation relationship includes a plurality of burn-up points and a pre-rod-changing strategy corresponding to each burn-up point, the pre-rod-changing strategy being used to indicate a pre-insertion step number of the corresponding control rod;

[0057] Step 120, adjusting the number of pre-insertion steps of each control rod according to the pre-rod replacement strategy corresponding to each control rod at the first burnup point;

[0058] Step 130: Perform rod replacement processing based on the adjusted multiple control rods.

[0059] In this embodiment, when it is detected that the current burn-up point is the first burn-up point, multiple pre-rod replacement strategies corresponding to the first burn-up point are obtained according to multiple rod replacement interpolation relationships of multiple control rods, each control rod corresponds to a rod replacement interpolation relationship, the rod replacement interpolation relationship includes multiple burn-up points, and the pre-rod replacement strategy corresponding to each burn-up point, the pre-rod replacement strategy is used to indicate the pre-insertion step number of the corresponding control rod; according to the pre-rod replacement strategy corresponding to each control rod at the first burn-up point, the pre-insertion step number of each control rod is adjusted; and rod replacement processing is performed based on the adjusted multiple control rods. In this way, by first adjusting the pre-insertion step number of each control rod according to the pre-rod replacement strategy corresponding to each control rod at the first burn-up point, and then performing rod replacement processing based on the adjusted multiple control rods, the disturbance of the pressurized water reactor can be reduced when the control rods are exchanged in rod sequence.

[0060] In the above step 110, when the electronic device detects that the current burn-up point is the first burn-up point, it obtains multiple pre-rod replacement strategies corresponding to the first burn-up point based on multiple rod replacement interpolation relationships of multiple control rods, each control rod corresponds to a rod replacement interpolation relationship, the rod replacement interpolation relationship includes multiple burn-up points and the pre-rod replacement strategy corresponding to each burn-up point, the pre-rod replacement strategy is used to indicate the pre-insertion step number of the corresponding control rod.

[0061] The above-mentioned rod-changing interpolation relationship may be expressed in the form of a table, or in other existing forms for expressing multiple corresponding relationships.

[0062] The above-mentioned rod-changing interpolation relationship is expressed in the form of a table, which may be that the rod-changing interpolation relationships corresponding to all control rods are placed in one table, or each control rod may have a separate table corresponding to it.

[0063] Each of the above-mentioned control rods corresponds to a rod-changing interpolation relationship, which may include multiple burn-up points and a pre-rod-changing strategy corresponding to each burn-up point. In the rod-changing interpolation relationship corresponding to a control rod, the control rod corresponds to multiple burn-up points, and each burn-up point corresponds to a pre-rod-changing strategy. A pre-rod-changing strategy includes an initial rod position and a pre-insertion step number corresponding to the initial rod position.

[0064] The above-mentioned pre-insertion step number can be a certain number of steps of inserting downward or a certain number of steps of lifting upward, which is not specifically limited in this embodiment. The certain number of steps of inserting downward is the pre-insertion of rods, and the certain number of steps of lifting upward is the pre-lifting of rods, wherein the pre-insertion of rods is to insert the control rods at a higher position downward, and the pre-lifting of rods is to lift the control rods at a lower position upward, and the pre-insertion of rods and the pre-lifting of rods can adopt the same method to obtain the pre-rod replacement strategy.

[0065] In the above step 120, the electronic device adjusts the number of pre-insertion steps of each control rod according to the pre-rod replacement strategy corresponding to each control rod at the first burnup point.

[0066] The above-mentioned adjustment of the pre-insertion step number of each control rod according to the pre-rod replacement strategy corresponding to each control rod at the first burn-up point may be performed by obtaining the pre-rod replacement strategy corresponding to each control rod at the first burn-up point in step 110. Since each rod replacement strategy contains a corresponding pre-insertion step number, the pre-insertion step number of each control rod is adjusted to the pre-insertion step number in the obtained pre-rod replacement strategy.

[0067] In the above step 130, rod replacement processing is performed based on the adjusted plurality of control rods.

[0068] The rod replacement process based on the adjusted multiple control rods may be to adjust the pre-insertion step number of each control rod to the pre-insertion step number in the obtained pre-rod replacement strategy, and then perform the rod replacement process on the control rods in a conventional rod replacement manner.

[0069] In some embodiments, when it is monitored that the current burnup point is the first burnup point, before acquiring a plurality of pre-rod replacement strategies corresponding to the first burnup point according to a plurality of rod replacement interpolation relationships of a plurality of control rods, the method may further include:

[0070] For any control rod among the plurality of control rods, a plurality of burnup points of the control rod in the whole life cycle of the pressurized water reactor and a plurality of candidate rod replacement strategies corresponding to each burnup point are obtained, wherein the candidate rod replacement strategy is used to indicate the number of pre-insertion steps of the control rod;

[0071] Calculate the evaluation result value of each candidate rod-changing strategy corresponding to each fuel consumption point;

[0072] For any one of the multiple burnup points of the control rod, according to the evaluation result value of each candidate rod replacement strategy corresponding to the burnup point, multiple candidate rod replacement strategies corresponding to the burnup point are selected to obtain a pre-rod replacement strategy corresponding to the burnup point;

[0073] According to the pre-rod replacement strategy corresponding to the burnup point, the rod replacement interpolation relationship corresponding to the control rod is constructed.

[0074] In this embodiment, by calculating the evaluation result value of each candidate rod replacement strategy corresponding to each burn-up point, and then for any burn-up point among the multiple burn-up points of the control rod, according to the evaluation result value of each candidate rod replacement strategy corresponding to the burn-up point, the multiple candidate rod replacement strategies corresponding to the burn-up point are selected, and the candidate rod replacement strategy with the best evaluation result value corresponding to each burn-up point corresponding to each control rod can be selected, and the candidate rod replacement strategy with the best evaluation result value is used as the pre-rod replacement strategy corresponding to the burn-up point corresponding to the control rod, which can better reduce the disturbance of the pressurized water reactor.

[0075] The above-mentioned acquisition of multiple control rod burnup points during the entire life cycle of the pressurized water reactor and multiple candidate rod replacement strategies corresponding to each burnup point can be performed by dividing the entire life cycle of the pressurized water reactor into multiple burnup intervals, selecting the burnup point corresponding to each burnup interval, and obtaining multiple burnup points; presetting multiple initial rod positions for each burnup point, presetting multiple pre-insertion steps for the initial rod position corresponding to each burnup point, each pre-insertion step number corresponding to a candidate rod replacement strategy, and obtaining multiple candidate rod replacement strategies corresponding to each burnup point, wherein the multiple burnup points have the same multiple initial rod positions, and each of the multiple initial rod positions is different.

[0076] For example, the three burnup points of 1000MWd / tU, mid-life, and end-of-life all have initial rod positions 480, 490, and 500, respectively. The initial rod position 480 corresponding to each burnup point has pre-insertion steps of 0, 7, 15, 20, and 30. The initial rod position 490 corresponding to each burnup point has pre-insertion steps of 0, 7, 15, 20, and 30. The initial rod position 500 corresponding to each burnup point has pre-insertion steps of 0, 7, 15, 20, and 30. Among them, the initial rod position of 480 and the pre-insertion step of 0 constitute a candidate rod replacement strategy.

[0077] The above-mentioned calculation of the evaluation result value of each candidate rod-changing strategy corresponding to each fuel consumption point may be to calculate the evaluation result value of each candidate rod-changing strategy corresponding to each fuel consumption point according to preset evaluation parameters.

[0078] The above-mentioned pre-rod replacement strategy corresponding to the burn-up point is used to construct the rod replacement interpolation relationship corresponding to the control rod. The pre-rod replacement strategy corresponding to each burn-up point can be mapped in a table to construct the rod replacement interpolation relationship corresponding to the control rod. The pre-rod replacement strategy corresponding to each burn-up point can also be mapped in a relationship diagram.

[0079] In some implementations, calculating the evaluation result value of each candidate rod-changing strategy corresponding to each burnup point may include:

[0080] Acquiring at least one evaluation parameter, the at least one evaluation parameter comprising at least one of a nuclear power fluctuation amplitude, a temperature fluctuation amplitude, an axial power offset fluctuation amplitude, a rod movement amount of the axial power offset, and a rod replacement time;

[0081] In a case where the at least one evaluation parameter includes one evaluation parameter, each candidate rod-changing strategy corresponding to the burn-up point is evaluated using the one evaluation parameter to obtain an evaluation result value of each candidate rod-changing strategy corresponding to the burn-up point;

[0082] If the at least one evaluation parameter includes multiple evaluation parameters, each of the multiple evaluation parameters is processed as follows: each candidate rod-changing strategy corresponding to the burn-up point is evaluated using the evaluation parameter to obtain a first result value of each candidate rod-changing strategy evaluated using the evaluation parameter;

[0083] For any candidate rod-changing strategy among the multiple candidate rod-changing strategies corresponding to the burn-up point, a weighted sum is performed on the first result value of each evaluation parameter evaluation corresponding to the candidate rod-changing strategy to obtain the evaluation result value of the candidate rod-changing strategy.

[0084] In this embodiment, each candidate rod-changing strategy corresponding to the burn-up point is evaluated by at least one evaluation parameter, which can better evaluate the superiority of the candidate rod-changing strategy and lay a good data foundation for the subsequent selection of the pre-rod-changing strategy.

[0085] The nuclear power fluctuation amplitude may be the fluctuation amplitude of the core power measured in the nuclear pressurized water reactor core. The smaller the nuclear power fluctuation amplitude is, the better the candidate rod replacement strategy is.

[0086] The temperature fluctuation amplitude may be the fluctuation amplitude of the temperature measured in the core of the nuclear pressurized water reactor. The smaller the temperature fluctuation amplitude, the better the candidate rod replacement strategy.

[0087] The smaller the fluctuation range of the above axial power offset is, the better the candidate rod-changing strategy is.

[0088] The rod movement amount of the axial power deviation may be that the control rod moves up and down during the rod replacement period, and the rod movement amount is used to measure the movement amplitude of the control rod up and down. The smaller the movement amplitude of the control rod up and down, the better the candidate rod replacement strategy.

[0089] The rod replacement time may be a control rod replacement time. The shorter the control rod replacement time is, the better the candidate rod replacement strategy is.

[0090] The above-mentioned nuclear power fluctuation amplitude, temperature fluctuation amplitude, axial power offset fluctuation amplitude, axial power offset rod movement amount and rod replacement time can be measured in a manner that can be obtained by those skilled in the art, and will not be described in detail in this embodiment.

[0091] The above-mentioned first result value of the evaluation of each evaluation parameter corresponding to the candidate stick-changing strategy is weightedly summed to obtain the evaluation result value of the candidate stick-changing strategy. It can be that the evaluation value of the evaluation parameter corresponding to each candidate strategy is first calculated, a certain weight is set for each evaluation parameter, and then the evaluation value is weighted using the weight corresponding to each evaluation parameter, and then the weighted evaluation value corresponding to each evaluation parameter is summed to obtain the evaluation result value of the candidate stick-changing strategy.

[0092] In some implementations, selecting multiple candidate rod-changing strategies corresponding to the burn-up point according to the evaluation result value of each candidate rod-changing strategy corresponding to the burn-up point to obtain the pre-rod-changing strategy corresponding to the burn-up point may include:

[0093] A candidate rod-changing strategy with the largest evaluation result value is selected from multiple candidate rod-changing strategies corresponding to the burn-up point as the pre-rod-changing strategy corresponding to the burn-up point, and the evaluation result value is used to characterize the superiority of the candidate rod-changing strategy.

[0094] In this embodiment, by selecting the candidate rod replacement strategy with the largest evaluation result value as the pre-rod replacement strategy corresponding to the burnup point, the disturbance of the pressurized water reactor can be reduced when the control rods are replaced in sequence.

[0095] The above evaluation result value is used to characterize the superiority of the candidate baton-changing strategy. The higher the score of the evaluation result value, the better the candidate baton-changing strategy.

[0096] The above-mentioned candidate rod replacement strategy with the largest evaluation result value is selected from the multiple candidate rod replacement strategies corresponding to the burn-up point as the pre-rod replacement strategy corresponding to the burn-up point. If the initial rod position corresponding to the selected pre-rod replacement strategy is different from the current rod position of the control rod, then after the control rod moves to the initial rod position corresponding to the pre-rod replacement strategy, the pre-rod replacement strategy is used to adjust the pre-insertion steps of the control rod.

[0097] In some embodiments, the candidate rod-changing strategy includes an initial rod position and a number of pre-insertion steps;

[0098] According to the evaluation result value of each candidate rod-changing strategy corresponding to the burn-up point, multiple candidate rod-changing strategies corresponding to the burn-up point are selected to obtain the pre-rod-changing strategy corresponding to the burn-up point, which may include:

[0099] Get the current position of the control stick;

[0100] Screening each candidate rod replacement strategy corresponding to the burnup point according to the current rod position of the control rod to obtain at least one candidate rod replacement strategy, wherein the initial rod position included in the at least one candidate rod replacement strategy is the same as the current rod position of the control rod;

[0101] A candidate rod-changing strategy with the largest evaluation result value is selected from at least one candidate rod-changing strategy as the pre-rod-changing strategy corresponding to the burn-up point, and the evaluation result value is used to characterize the superiority of the candidate rod-changing strategy.

[0102] In this embodiment, each candidate rod replacement strategy corresponding to the burn-up point is screened according to the current rod position of the control rod, and then the candidate rod replacement strategy with the largest evaluation result value is selected from at least one candidate rod replacement strategy as the pre-rod replacement strategy corresponding to the burn-up point. Since the current rod position of the control rod is the same as the initial rod position of the pre-rod replacement strategy, the pre-rod replacement strategy can be directly used to adjust the pre-insertion steps of the control rod. The selected pre-rod replacement strategy is the candidate rod replacement strategy with the largest evaluation result value corresponding to the initial rod position that is the same as the current rod position of the control rod. Therefore, the disturbance of the pressurized water reactor can be reduced when the control rods are exchanged in sequence.

[0103] The above-mentioned method of screening each candidate rod changing strategy corresponding to the burn-up point according to the current rod position of the control rod to obtain at least one candidate rod changing strategy may be to screen each candidate rod changing strategy corresponding to the burn-up point according to the current rod position of the control rod, and select at least one candidate rod changing strategy whose initial rod position is the same as the current rod position of the control rod.

[0104] The above-mentioned selecting the candidate rod-changing strategy with the largest evaluation result value from at least one candidate rod-changing strategy as the pre-rod-changing strategy corresponding to the fuel consumption point can be, if there is only one candidate rod-changing strategy screened out, then the candidate rod-changing strategy is used as the pre-rod-changing strategy corresponding to the fuel consumption point; if there is more than one candidate rod-changing strategy screened out, then the candidate rod-changing strategy with the largest evaluation result value is selected as the pre-rod-changing strategy corresponding to the fuel consumption point.

[0105] In some embodiments, the pre-rod replacement strategy includes an initial rod position, a pre-insertion step number, and an evaluation result value, and the evaluation result value is used to characterize the superiority of the pre-rod replacement strategy;

[0106] When it is monitored that the current burnup point is the first burnup point, obtaining multiple pre-rod replacement strategies corresponding to the first burnup point according to multiple rod replacement interpolation relationships of multiple control rods may include:

[0107] In the case where it is monitored that the current burn-up point is the first burn-up point, if the rod-changing interpolation relationship of the first control rod among the multiple control rods does not include the first burn-up point, and the first burn-up point is between the second burn-up point and the third burn-up point in the rod-changing interpolation relationship of the first control rod, then the target pre-rod-changing strategies corresponding to the second burn-up point and the third burn-up point are selected from the rod-changing interpolation relationship of the first control rod, wherein the evaluation result value of the target pre-rod-changing strategy corresponding to the second burn-up point is the largest among all the pre-rod-changing strategies corresponding to the second burn-up point, and the evaluation result value of the target pre-rod-changing strategy corresponding to the third burn-up point is the largest among all the pre-rod-changing strategies corresponding to the third burn-up point; or, the initial rod positions of the target pre-rod-changing strategies corresponding to the second burn-up point and the third burn-up point are both the same as the current rod position of the first control rod;

[0108] Interpolation processing is performed based on the target pre-rod replacement strategies corresponding to the second burn-up point and the third burn-up point, so as to obtain the pre-rod replacement strategy for the first control rod at the first burn-up point.

[0109] In this embodiment, if the rod-changing interpolation relationship of a first control rod among a plurality of control rods does not include the first burn-up point, and the first burn-up point is between the second burn-up point and the third burn-up point of the rod-changing interpolation relationship of the first control rod, the pre-rod-changing strategy for the first burn-up point can be calculated according to the target pre-rod-changing strategies corresponding to the second burn-up point and the third burn-up point respectively. Even if the first burn-up point is not in the rod-changing interpolation relationship, a relatively excellent pre-rod-changing strategy can be calculated. Such a calculation process is simple, reduces the amount of calculation, and can reduce the disturbance of the pressurized water reactor when the control rods are exchanged in rod sequence.

[0110] In the above case where it is monitored that the current burn-up point is the first burn-up point, if the rod-changing interpolation relationship of the first control rod among the multiple control rods does not include the first burn-up point, and the first burn-up point is between the second burn-up point and the third burn-up point of the rod-changing interpolation relationship of the first control rod, there are several ways to calculate the pre-rod-changing strategy for the first burn-up point. The details are as follows:

[0111] The first method is: selecting the target pre-rod replacement strategies corresponding to the second burn-up point and the third burn-up point respectively from the rod replacement interpolation relationship of the first control rod, wherein the evaluation result value of the target pre-rod replacement strategy corresponding to the second burn-up point is the largest among all the pre-rod replacement strategies corresponding to the second burn-up point, and the evaluation result value of the target pre-rod replacement strategy corresponding to the third burn-up point is the largest among all the pre-rod replacement strategies corresponding to the third burn-up point, and then interpolating processing is performed based on the target pre-rod replacement strategies corresponding to the second burn-up point and the third burn-up point respectively to obtain the pre-rod replacement strategy of the first control rod at the first burn-up point.

[0112] The second method is: first select the initial rod positions of the second burn-up point and the third burn-up point that are the same as the current rod position of the first control rod, then obtain the target pre-rod replacement strategies corresponding to the initial rod positions of the second burn-up point and the third burn-up point, and finally perform interpolation processing based on the target pre-rod replacement strategies corresponding to the second burn-up point and the third burn-up point to obtain the pre-rod replacement strategy for the first control rod at the first burn-up point.

[0113] The above evaluation result value is used to characterize the superiority of the pre-rod-changing strategy. Since the pre-rod-changing strategy is selected from multiple candidate rod-changing strategies, the evaluation result value can be used to characterize the superiority of the pre-rod-changing strategy.

[0114] In some implementations, the interpolation process may include:

[0115] Obtain two initial rod positions from the two target rod replacement strategies, and average the two initial rod positions to obtain the initial rod position of the pre-rod replacement strategy for the first control rod at the first burnup point;

[0116] Two pre-insertion step numbers are obtained from the two target rod-changing strategies, and the two pre-insertion step numbers are summed and averaged to obtain the pre-insertion step number of the pre-rod-changing strategy for the first control rod at the first burnup point.

[0117] In this embodiment, the initial rod position and pre-insertion step number of the pre-rod replacement strategy for the first burn-up point are calculated based on two excellent target rod replacement strategies, so that the calculated pre-rod replacement strategy for the first burn-up point is also an excellent strategy, which can reduce the disturbance of the pressurized water reactor when the control rods are exchanged in sequence at the first burn-up point.

[0118] The above method of obtaining two initial rod positions from two target rod-changing strategies and averaging the two initial rod positions to obtain the initial rod position of the pre-rod-changing strategy of the first control rod at the first burn-up point can be performed by averaging the two initial rod positions regardless of whether the two initial rod positions in the two target rod-changing strategies are different. If the two initial rod positions obtained from the two target rod-changing strategies are different, the initial rod position of the pre-rod-changing strategy of the first control rod at the first burn-up point may not be the current rod position of the first control rod. It is necessary to wait until the first control rod moves to the initial rod position of the pre-rod-changing strategy of the first burn-up point, and then use the pre-rod-changing strategy of the first burn-up point to adjust the number of pre-insertion steps of the control rod. If the two initial rod positions obtained from the two target rod-changing strategies are the same, the pre-rod-changing strategy of the first burn-up point is directly used to adjust the number of pre-insertion steps of the control rod.

[0119] The above-mentioned method of obtaining two pre-insertion steps from two target rod-changing strategies and averaging the two pre-insertion steps to obtain the pre-insertion step number of the pre-rod-changing strategy for the first control rod at the first burn-up point may be to obtain two pre-insertion steps from two target rod-changing strategies, first sum the two pre-insertion step numbers, and then average the summed results to obtain the pre-insertion step number of the pre-rod-changing strategy for the first control rod at the first burn-up point.

[0120] To facilitate understanding by those skilled in the art, a set of best embodiments is provided below:

[0121] During the operation of a pressurized water reactor, as fuel is consumed and power needs to be raised or lowered, its reactivity needs to be compensated. In order to improve the speed and accuracy of reactivity compensation in the above process, a pressurized water reactor based on a rod adjustment mode is usually designed. In order to reduce the burnup shadow effect caused by the long-term insertion of control rods into the core, as well as the burnup effect of the control rods themselves, the control rod sequence needs to be exchanged. For example, in a certain design, the T rod group includes T1, T2, T3 and T4, a total of 4 groups of control rods. The initial rod sequence of the control rods is T1-T2-T3-T4, and the rod sequence after the control rod exchange is T4-T3-T2-T1. The rod exchange operation is to switch the rod sequence between the initial rod sequence and the rod exchange sequence.

[0122] During normal operation, the T rod groups meet a certain step relationship, which means that the control rods will move in a specified order during the lifting process, and sometimes multiple control rod groups will move at the same time. Due to the set lifting or insertion limits, these rod groups will automatically stop when they reach these positions. An example of a T rod group step setting is shown in Figure 2 .

[0123] Normally, when changing rods, the positions of the two control rods T1 and T4 are exchanged first, and then the positions of the two control rods T2 and T3 are exchanged. The rates of lowering and raising the two control rods are kept consistent. Figure 3 As shown in the figure, since the two sets of control rods are located at different positions in the core, the disturbance degree caused by the control rod movement to the core is also different. Synchronous movement will cause large disturbances in parameters such as core power, temperature, and axial power offset (AO).

[0124] In order to reduce such disturbance, this embodiment proposes a new idea, which is to pre-process the control rod movement: (1) pre-insert the control rod, so that the control rod at the high rod position is inserted down a certain number of steps first; or (2) pre-lift the control rod, so that the control rod at the low rod position is lifted up a certain number of steps first, so as to reduce the impact of the control rod movement during the rod replacement process. The pre-processed rod replacement process is as follows: Figure 4 and Figure 5 As shown. At different burnup points in the whole life cycle, the number of control rod pretreatment steps may not be exactly the same. The above pretreatment rod position can be a pre-calculated function that changes with burnup, or it can be calculated in real time using core measurement parameters.

[0125] The problem to be solved in this embodiment is to address the problem of large core disturbance caused by synchronous rod replacement, and propose a control rod action pre-processing interpolation table that changes with fuel consumption, or perform real-time calculations through core measurement parameters to obtain the best pre-processing rod replacement plan (i.e., pre-rod replacement strategy) at the current fuel consumption point. The specific contents include the following:

[0126] 1. Prepare the fuel consumption preprocessing interpolation table.

[0127] Reference Figure 6 , verify different pre-insertion rod replacement strategies (i.e. candidate rod replacement strategies) at certain intervals during the full cycle life. For a certain rod replacement pretreatment strategy, the preparation method is as follows:

[0128] (1) Identify the burn-up point used as the calibration point during the life cycle.

[0129] (2) For a certain fuel consumption point, verify different pre-rod insertion and rod replacement strategies and evaluate the control results based on the evaluation criteria.

[0130] (3) After all the pre-rod replacement strategies to be verified at a certain burnup point are verified, the optimal pre-treatment rod replacement plan (i.e., pre-rod replacement strategy) is selected as the value of the interpolation table for the burnup point.

[0131] (4) Repeat (2) and (3) to verify all the burnup points to be verified and complete the preparation of the burnup preprocessing interpolation table.

[0132] 2. Evaluation criteria.

[0133] Evaluation criteria can be selected but not limited to the following parameters:

[0134] Nuclear power fluctuation range: the smaller the fluctuation, the better the solution.

[0135] Temperature fluctuation range: The smaller the fluctuation, the better the solution.

[0136] AO fluctuation range: The smaller the fluctuation, the better the solution.

[0137] AO stick movement amount: the fewer movements, the better the solution.

[0138] Rod changing time: The shorter the time, the better the solution.

[0139] When multiple objectives are optimized, this embodiment adopts the weighted summation method:

[0140] If there are n evaluation criteria in total, the i-th evaluation criterion considered is a i , the corresponding weight is k i , then the solution score S is:

[0141]

[0142] The higher the S score, the better the solution.

[0143] This embodiment provides a fuel consumption preprocessing interpolation table by performing sensitivity analysis on different pre-insertion steps (i.e., pre-insertion steps) at different fuel consumption points, which provides a reference for the actual use of rod replacement operation in the rod-controlled core and improves the stability of the rod replacement process.

[0144] This embodiment takes three burnup points of a fuel cycle, 1000MW, mid-life, and end-of-life, and the initial pre-insertion of 0, 7, 15, 20, and 30 steps for rod replacement at each burnup point as an example, and a burnup-pre-insertion step interpolation table is shown in Table 1. The table uses the A0 fluctuation amplitude as the evaluation standard to sort the rod replacement schemes with the number of pre-insertion steps. For example, if you want to obtain the pre-insertion step of the burnup point between mid-life and end-of-life, you can interpolate from the 7 steps corresponding to mid-life and the 0 step corresponding to MWd / tU at the end-of-life, and the result is 3.5 steps, which is rounded up to 4 steps.

[0145] Table 1 Burnup preprocessing interpolation table

[0146]

[0147] Reference Figure 7 , is a schematic diagram of the structure of a pressurized water reactor rod replacement system provided in an embodiment of the present application. The system may include:

[0148] The pre-rod replacement strategy acquisition module 710 is used to acquire a plurality of pre-rod replacement strategies corresponding to the first burn-up point according to a plurality of rod replacement interpolation relationships of a plurality of control rods when the current burn-up point is monitored to be the first burn-up point, wherein each control rod corresponds to a rod replacement interpolation relationship, the rod replacement interpolation relationship includes a plurality of burn-up points and a pre-rod replacement strategy corresponding to each burn-up point, the pre-rod replacement strategy being used to indicate the number of pre-insertion steps of the corresponding control rod;

[0149] A pre-insertion step number adjustment module 720, configured to adjust the pre-insertion step number of each control rod according to the pre-rod replacement strategy corresponding to each control rod at the first burnup point;

[0150] The control rod replacement processing module 730 is used to perform rod replacement processing based on the adjusted multiple control rods.

[0151] In some implementations, the pre-rod replacement strategy acquisition module 710 may be specifically used to:

[0152] For any control rod among the plurality of control rods, a plurality of burnup points of the control rod in the whole life cycle of the pressurized water reactor and a plurality of candidate rod replacement strategies corresponding to each burnup point are obtained, wherein the candidate rod replacement strategy is used to indicate the number of pre-insertion steps of the control rod;

[0153] Calculate the evaluation result value of each candidate rod-changing strategy corresponding to each fuel consumption point;

[0154] For any one of the multiple burnup points of the control rod, according to the evaluation result value of each candidate rod replacement strategy corresponding to the burnup point, multiple candidate rod replacement strategies corresponding to the burnup point are selected to obtain a pre-rod replacement strategy corresponding to the burnup point;

[0155] According to the pre-rod replacement strategy corresponding to the burnup point, the rod replacement interpolation relationship corresponding to the control rod is constructed.

[0156] In some implementations, the pre-rod replacement strategy acquisition module 710 may be specifically used to:

[0157] Acquiring at least one evaluation parameter, the at least one evaluation parameter comprising at least one of a nuclear power fluctuation amplitude, a temperature fluctuation amplitude, an axial power offset fluctuation amplitude, a rod movement amount of the axial power offset, and a rod replacement time;

[0158] In a case where the at least one evaluation parameter includes one evaluation parameter, each candidate rod-changing strategy corresponding to the burn-up point is evaluated using the one evaluation parameter to obtain an evaluation result value of each candidate rod-changing strategy corresponding to the burn-up point;

[0159] If the at least one evaluation parameter includes multiple evaluation parameters, each of the multiple evaluation parameters is processed as follows: each candidate rod-changing strategy corresponding to the burn-up point is evaluated using the evaluation parameter to obtain a first result value of each candidate rod-changing strategy evaluated using the evaluation parameter;

[0160] For any candidate rod-changing strategy among the multiple candidate rod-changing strategies corresponding to the burn-up point, a weighted sum is performed on the first result value of each evaluation parameter evaluation corresponding to the candidate rod-changing strategy to obtain the evaluation result value of the candidate rod-changing strategy.

[0161] In some implementations, the pre-rod replacement strategy acquisition module 710 may be specifically used to:

[0162] A candidate rod-changing strategy with the largest evaluation result value is selected from multiple candidate rod-changing strategies corresponding to the burn-up point as the pre-rod-changing strategy corresponding to the burn-up point, and the evaluation result value is used to characterize the superiority of the candidate rod-changing strategy.

[0163] In some implementations, the pre-rod replacement strategy acquisition module 710 may be specifically used to:

[0164] Get the current position of the control stick;

[0165] Screening each candidate rod replacement strategy corresponding to the burnup point according to the current rod position of the control rod to obtain at least one candidate rod replacement strategy, wherein the initial rod position included in the at least one candidate rod replacement strategy is the same as the current rod position of the control rod;

[0166] A candidate rod-changing strategy with the largest evaluation result value is selected from at least one candidate rod-changing strategy as the pre-rod-changing strategy corresponding to the burn-up point, and the evaluation result value is used to characterize the superiority of the candidate rod-changing strategy.

[0167] In some implementations, the pre-rod replacement strategy acquisition module 710 may be specifically used to:

[0168] In the case where it is monitored that the current burn-up point is the first burn-up point, if the rod-changing interpolation relationship of the first control rod among the multiple control rods does not include the first burn-up point, and the first burn-up point is between the second burn-up point and the third burn-up point in the rod-changing interpolation relationship of the first control rod, then the target pre-rod-changing strategies corresponding to the second burn-up point and the third burn-up point are selected from the rod-changing interpolation relationship of the first control rod, wherein the evaluation result value of the target pre-rod-changing strategy corresponding to the second burn-up point is the largest among all the pre-rod-changing strategies corresponding to the second burn-up point, and the evaluation result value of the target pre-rod-changing strategy corresponding to the third burn-up point is the largest among all the pre-rod-changing strategies corresponding to the third burn-up point; or, the initial rod positions of the target pre-rod-changing strategies corresponding to the second burn-up point and the third burn-up point are both the same as the current rod position of the first control rod;

[0169] Interpolation processing is performed based on the target pre-rod replacement strategies corresponding to the second burn-up point and the third burn-up point, so as to obtain the pre-rod replacement strategy for the first control rod at the first burn-up point.

[0170] In some implementations, the pre-rod replacement strategy acquisition module 710 may be specifically used to:

[0171] Obtain two initial rod positions from the two target rod replacement strategies, and average the two initial rod positions to obtain the initial rod position of the pre-rod replacement strategy for the first control rod at the first burnup point;

[0172] Two pre-insertion step numbers are obtained from the two target rod-changing strategies, and the two pre-insertion step numbers are summed and averaged to obtain the pre-insertion step number of the pre-rod-changing strategy for the first control rod at the first burnup point.

[0173] It should be noted that, since the pressurized water reactor rod replacement system in this embodiment and the pressurized water reactor rod replacement method described above are based on the same inventive concept, the corresponding contents in the method embodiment are also applicable to the system embodiment and will not be described in detail here.

[0174] Reference Figure 8 The embodiment of the present application further provides an electronic device, which may include:

[0175] at least one memory;

[0176] at least one processor;

[0177] at least one program;

[0178] The programs are stored in the memory, and the processor executes at least one program to implement the pressurized water reactor rod replacement method according to the present disclosure.

[0179] The electronic device may be any intelligent terminal including a mobile phone, a tablet computer, a personal digital assistant (PDA), a car computer, etc.

[0180] The electronic device according to the embodiment of the present application is described in detail below.

[0181] The processor 810 may be implemented by a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present disclosure;

[0182] The memory 820 may be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 820 may store an operating system and other application programs. When the technical solution provided in the embodiments of this specification is implemented by software or firmware, the relevant program code is stored in the memory 820, and the processor 810 calls and executes the pressurized water reactor rod replacement method of the embodiment of the present disclosure.

[0183] Input / output interface 830, used to implement information input and output;

[0184] The communication interface 840 is used to realize the communication interaction between the device and other devices. The communication can be realized through a wired manner (such as USB, network cable, etc.) or a wireless manner (such as mobile network, WIFI, Bluetooth, etc.);

[0185] bus 850 , which transmits information between the various components of the device (e.g., processor 810 , memory 820 , input / output interface 830 , and communication interface 840 );

[0186] The processor 810 , the memory 820 , the input / output interface 830 and the communication interface 840 are connected to each other in communication within the device via a bus 850 .

[0187] The embodiment of the present disclosure further provides a storage medium, which is a computer-readable storage medium. The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the above-mentioned pressurized water reactor rod replacement method.

[0188] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0189] The embodiments described in the embodiments of the present disclosure are intended to more clearly illustrate the technical solutions of the embodiments of the present disclosure and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of the present disclosure are also applicable to similar technical problems.

[0190] Those skilled in the art will appreciate that the technical solutions shown in the figures do not limit the embodiments of the present disclosure and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0191] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0192] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0193] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0194] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0195] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0196] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0197] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0198] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including multiple instructions to enable an electronic device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store programs. The above is a detailed description of the embodiments of the present application in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Within the scope of knowledge possessed by ordinary technicians in the relevant technical field, various changes can be made without departing from the purpose of the present application.

Claims

1. A pressurized water reactor rod replacement method, characterized in that: The method comprises: In the case where it is monitored that the current burnup point is the first burnup point, a plurality of pre-rod replacement strategies corresponding to the first burnup point are obtained according to a plurality of rod replacement interpolation relationships of a plurality of control rods, each of the control rods corresponds to a rod replacement interpolation relationship, the rod replacement interpolation relationship includes a plurality of burnup points and a pre-rod replacement strategy corresponding to each of the burnup points, the pre-rod replacement strategy is used to indicate the number of pre-insertion steps of the corresponding control rod; adjusting the number of pre-insertion steps of each control rod according to the pre-rod replacement strategy corresponding to each control rod at the first burnup point; A rod replacement process is performed based on the adjusted plurality of control rods.

2. The rod replacement method for a pressurized water reactor according to claim 1, characterized in that: When it is monitored that the current burnup point is the first burnup point, before obtaining a plurality of pre-rod replacement strategies corresponding to the first burnup point according to a plurality of rod replacement interpolation relationships of a plurality of control rods, the method further comprises: For any control rod among the plurality of control rods, obtaining a plurality of burnup points of the control rod during the entire life of the pressurized water reactor and a plurality of candidate rod replacement strategies corresponding to each of the burnup points, wherein the candidate rod replacement strategy is used to indicate a pre-insertion step number of the control rod; Calculating the evaluation result value of each candidate rod-changing strategy corresponding to each of the fuel consumption points; For any one of the multiple burnup points of the control rod, according to the evaluation result value of each candidate rod replacement strategy corresponding to the burnup point, multiple candidate rod replacement strategies corresponding to the burnup point are selected to obtain a pre-rod replacement strategy corresponding to the burnup point; According to the pre-rod replacement strategy corresponding to the burnup point, a rod replacement interpolation relationship corresponding to the control rod is constructed.

3. The rod replacement method for a pressurized water reactor according to claim 2, characterized in that: The calculating the evaluation result value of each candidate rod replacement strategy corresponding to each of the burn-up points includes: Acquiring at least one evaluation parameter, wherein the at least one evaluation parameter includes at least one of a nuclear power fluctuation amplitude, a temperature fluctuation amplitude, an axial power offset fluctuation amplitude, a rod movement amount of the axial power offset, and a rod replacement time; In a case where the at least one evaluation parameter includes one evaluation parameter, using the one evaluation parameter to evaluate each of the candidate rod-changing strategies corresponding to the burn-up point to obtain an evaluation result value of each of the candidate rod-changing strategies corresponding to the burn-up point; If the at least one evaluation parameter includes multiple evaluation parameters, each of the multiple evaluation parameters is processed as follows: each of the candidate rod-changing strategies corresponding to the burn-up point is evaluated using the evaluation parameter to obtain a first result value of each candidate rod-changing strategy evaluated using the evaluation parameter; For any candidate rod-changing strategy among the multiple candidate rod-changing strategies corresponding to the burn-up point, a weighted sum is performed on the first result value of each evaluation parameter evaluation corresponding to the candidate rod-changing strategy to obtain the evaluation result value of the candidate rod-changing strategy.

4. The rod replacement method for a pressurized water reactor according to claim 2, characterized in that: The step of selecting a plurality of candidate rod-changing strategies corresponding to the burn-up point according to the evaluation result value of each candidate rod-changing strategy corresponding to the burn-up point to obtain a pre-rod-changing strategy corresponding to the burn-up point includes: A candidate rod-changing strategy with the largest evaluation result value is selected from a plurality of candidate rod-changing strategies corresponding to the burn-up point as the pre-rod-changing strategy corresponding to the burn-up point, wherein the evaluation result value is used to characterize the superiority of the candidate rod-changing strategy.

5. The rod replacement method for a pressurized water reactor according to claim 2, characterized in that: The candidate rod-changing strategy includes an initial rod position and a number of pre-insertion steps; The step of selecting a plurality of candidate rod-changing strategies corresponding to the burn-up point according to the evaluation result value of each candidate rod-changing strategy corresponding to the burn-up point to obtain a pre-rod-changing strategy corresponding to the burn-up point includes: Acquire the current rod position of the control rod; Screening each candidate rod replacement strategy corresponding to the burnup point according to the current rod position of the control rod to obtain at least one candidate rod replacement strategy, wherein the initial rod position included in the at least one candidate rod replacement strategy is the same as the current rod position of the control rod; A candidate rod-changing strategy with the largest evaluation result value is selected from the at least one candidate rod-changing strategy as the pre-rod-changing strategy corresponding to the burn-up point, and the evaluation result value is used to characterize the superiority of the candidate rod-changing strategy.

6. The rod replacement method for a pressurized water reactor according to claim 1, characterized in that: The pre-rod replacement strategy includes an initial rod position, a pre-insertion step number, and an evaluation result value, and the evaluation result value is used to characterize the superiority of the pre-rod replacement strategy; When it is monitored that the current burnup point is the first burnup point, a plurality of pre-rod replacement strategies corresponding to the first burnup point are obtained according to a plurality of rod replacement interpolation relationships of a plurality of control rods, including: In the case where it is monitored that the current burn-up point is the first burn-up point, if the rod-changing interpolation relationship of the first control rod among the multiple control rods does not include the first burn-up point, and the first burn-up point is between the second burn-up point and the third burn-up point of the rod-changing interpolation relationship of the first control rod, then the target pre-rod-changing strategy corresponding to the second burn-up point and the third burn-up point is selected from the rod-changing interpolation relationship of the first control rod, wherein the evaluation result value of the target pre-rod-changing strategy corresponding to the second burn-up point is the largest among all the pre-rod-changing strategies corresponding to the second burn-up point, and the evaluation result value of the target pre-rod-changing strategy corresponding to the third burn-up point is the largest among all the pre-rod-changing strategies corresponding to the third burn-up point; or, the initial rod positions of the target pre-rod-changing strategies corresponding to the second burn-up point and the third burn-up point are both the same as the current rod position of the first control rod; An interpolation process is performed based on the target pre-rod replacement strategies corresponding to the second burn-up point and the third burn-up point, respectively, to obtain a pre-rod replacement strategy for the first control rod at the first burn-up point.

7. The rod replacement method for a pressurized water reactor according to claim 6, characterized in that: The interpolation process includes: acquiring two initial rod positions from the two target rod replacement strategies, and averaging the two initial rod positions to obtain an initial rod position of the first control rod for the pre-rod replacement strategy at the first burnup point; Two pre-insertion step numbers are obtained from the two target rod-changing strategies, and the two pre-insertion step numbers are summed and averaged to obtain the pre-insertion step number of the pre-rod-changing strategy of the first control rod at the first burnup point.

8. A rod replacement system for a pressurized water reactor, characterized in that: The system comprises: a pre-rod replacement strategy acquisition module, configured to acquire, when monitoring that the current burn-up point is a first burn-up point, a plurality of pre-rod replacement strategies corresponding to the first burn-up point according to a plurality of rod replacement interpolation relationships of a plurality of control rods, each of the control rods corresponding to a rod replacement interpolation relationship, the rod replacement interpolation relationship including a plurality of burn-up points and a pre-rod replacement strategy corresponding to each of the burn-up points, the pre-rod replacement strategy being used to indicate a pre-insertion step number of the corresponding control rod; a pre-insertion step number adjustment module, configured to adjust the pre-insertion step number of each control rod according to the pre-rod replacement strategy corresponding to each control rod at the first burnup point; A control rod replacement processing module is used to perform a rod replacement process based on the adjusted plurality of control rods.

9. An electronic device, characterized in that: It comprises at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions executable by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the pressurized water reactor rod replacement method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the pressurized water reactor rod replacement method according to any one of claims 1 to 7.

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