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

Abstract

The invention discloses a pressurized water reactor rod changing control method and system, electronic equipment and a storage medium, and the method comprises the steps: obtaining the differential value relationship of each group of control rods in two groups of control rods, the differential value relationship comprising the corresponding relationship between the differential value of the corresponding group of control rods and the insertion step number of the group of control rods, the differential value is used for representing reactive change caused by movement of the control rods from different heights for a unit distance, and the two groups of control rods need to exchange insertion steps in the rod replacement process; based on the differential value relationship of each group of control rods, determining the average reactivity of the two groups of control rods in unit time; determining the moving step number of each group of control rods according to the average reactivity of each group of control rods; determining a target moving speed of each group of control rods according to the moving step number of each group of control rods; and controlling each group of control rods to change the rods according to the respective corresponding target moving speed. According to the invention, disturbance of the pressurized water reactor core can be reduced in the control rod changing process.

Description

Technical Field

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

[0002] During the operation of a pressurized water reactor, in order to reduce the burnup shadow effect caused by the long-term insertion of control rods into the core and to homogenize the burnup of the control rods themselves, the control rod sequence needs to be exchanged.

[0003] Since the two sets of control rods are located at different positions in the core, if the control rods at different positions are simultaneously raised or lowered by the same number of steps, the reactivity introduced to the PWR core will be different, thus causing greater disturbances in the PWR core. Summary of the invention

[0004] The present application aims to provide a pressurized water reactor rod replacement control method, system, electronic equipment and storage medium, which can reduce the disturbance of the pressurized water reactor core during the control rod replacement process.

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

[0006] Obtaining a differential value relationship of each control rod group in the two control rod groups, the differential value relationship including a corresponding relationship between a differential value of a corresponding group of control rods and an insertion step number of the control rod group, the differential value being used to characterize a reactivity change caused by a control rod moving a unit distance from different heights, each control rod group including at least one control rod, and the two control rod groups need to interchange insertion steps during the rod replacement process;

[0007] Based on the differential value relationship of each set of control rods, the average reactivity of the two sets of control rods per unit time is determined;

[0008] The number of movement steps of each group of control rods is determined according to the average reactivity of each group of control rods;

[0009] According to the number of movement steps of each group of control rods, the target movement speed of each group of control rods is determined;

[0010] Each group of control rods is controlled to change rods according to their corresponding target moving speeds.

[0011] In some embodiments, determining the average reactivity per unit time of two groups of control rods based on the differential value relationship of each group of control rods includes:

[0012] Obtaining an expected rod replacement time of each group of control rods and an integral value within the expected rod replacement time, wherein the integral value is used to characterize a reactivity change caused by each group of control rods moving from one rod position to another rod position within the expected rod replacement time;

[0013] Determining an average differential value of each group of control rods based on the differential value relationship of each group of control rods;

[0014] Determine the steady moving speed of each group of control rods based on the average differential value, integral value and estimated rod replacement time;

[0015] According to the steady moving speed of each group of control rods, the steady moving average speed of the two groups of control rods is determined;

[0016] Based on the steady moving average velocity, the average reactivity of the two groups of control rods per unit time is determined.

[0017] In some embodiments, determining an average differential value of each group of control rods based on the differential value relationship of each group of control rods includes:

[0018] According to the differential value relationship of each group of control rods, a target differential value range corresponding to each group of control rods is determined, and the differential value variation range in the target differential value range is within a preset range;

[0019] Calculate the average differential value for each set of control rods within their respective target differential value ranges.

[0020] In some embodiments, calculating the average differential value of each group of control rods within the respective target differential value range includes:

[0021] For each group of control rods, multiple differential values ​​within a target differential value range are selected from the differential value relationship;

[0022] Multiple differential values ​​are averaged to obtain the average differential value of each group of control rods within their respective target differential value ranges.

[0023] In some embodiments, determining the number of movement steps of each group of control rods according to the average reactivity of each group of control rods comprises:

[0024] Obtain the initial rod position of each group of control rods;

[0025] The rod position intervals in the control rod replacement process are divided to obtain at least two rod position intervals arranged in a sequence of the rod position intervals, wherein the at least two rod position intervals include a first rod position interval arranged at the first position and a second rod position interval arranged at the last position, and the first rod position interval and the second rod position interval have equal interval reactivity;

[0026] According to the initial rod position of each group of control rods, determining one of a first rod position interval and a second rod position interval corresponding to each group of control rods;

[0027] According to the interval reactivity and the initial rod position of each group of control rods, the final rod position of each group of control rods in the corresponding rod position interval is obtained;

[0028] The number of movement steps of each group of control rods is determined based on the initial rod position and the final rod position.

[0029] In some embodiments, determining a target moving speed of each group of control rods according to the number of moving steps of each group of control rods includes:

[0030] According to the interval reactivity and average reactivity, the moving time of each group of control rods in the corresponding rod position interval is calculated;

[0031] According to the moving steps and moving time, the moving speed of each group of control rods in the corresponding rod position interval is calculated;

[0032] The ratio of the moving speed to the steady moving average speed is determined as the normalized speed change factor of each group of control rods in the corresponding first rod position interval, and the steady moving average speed is determined based on the differential value relationship of each group of control rods;

[0033] If the normalized speed change factor meets the preset conditions, the moving speed is used as the target moving speed of each group of control rods.

[0034] In some embodiments, if the normalized speed change factor satisfies a preset condition, the moving speed is used as the target moving speed of each group of control rods, including:

[0035] taking the absolute value of the difference between the normalized speed change factor and the pre-acquired first adjustment factor as the first fluctuation value;

[0036] Under the preset condition that the first fluctuation value is less than the pre-acquired second adjustment factor, the moving speed is used as the target moving speed of each group of control rods.

[0037] In a second aspect, the embodiment of the present application further provides a pressurized water reactor rod replacement control system, the system comprising:

[0038] A data acquisition module, used for acquiring a differential value relationship of each control rod group in the two control rod groups, wherein the differential value relationship includes a corresponding relationship between a differential value of a corresponding control rod group and an insertion step number of the control rod group, wherein the differential value is used to characterize a reactivity change caused by a control rod group moving a unit distance from different heights, wherein each control rod group includes at least one control rod, and the two control rod groups need to interchange insertion steps during the rod replacement process;

[0039] a reactivity determination module for determining average reactivity of two groups of control rods per unit time based on a differential value relationship of each group of control rods;

[0040] A moving step number determination module, used for determining the moving step number of each group of control rods according to the average reactivity of each group of control rods;

[0041] A moving speed determination module, used to determine a target moving speed of each group of control rods according to the number of moving steps of each group of control rods;

[0042] The rod changing control module is used to control each group of control rods to change rods according to their corresponding target moving speeds.

[0043] 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 control method as described in the first aspect.

[0044] 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 control method as described in the first aspect.

[0045] In the embodiment of the present application, by obtaining the differential value relationship of each group of control rods in the two groups of control rods, the differential value relationship includes the corresponding relationship between the differential value of the corresponding group of control rods and the number of insertion steps of the group of control rods, the differential value is used to characterize the reactivity change caused by the control rods moving unit distance from different heights, each group of control rods includes at least one control rod, and the two groups of control rods need to exchange the number of insertion steps during the rod replacement process; based on the differential value relationship of each group of control rods, the average reactivity of the two groups of control rods in unit time is determined; according to the average reactivity of each group of control rods, the number of moving steps of each group of control rods is determined; according to the number of moving steps of each group of control rods, the target moving speed of each group of control rods is determined; and each group of control rods is controlled to change rods according to their corresponding target moving speeds. In this way, since the target moving speed of each group of control rods is determined according to the average reactivity of each group of control rods, each group of control rods is moved according to the target moving speed, so that the reactivity generated when the two groups of control rods are lifted or inserted at the same time can be offset as much as possible, so that the disturbance of the pressurized water reactor core can be reduced during the control rod replacement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] 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:

[0047] Figure 1 It is a flow chart of an embodiment of a pressurized water reactor rod replacement control method provided by the present application;

[0048] Figure 2 It is a schematic diagram of the T-rod group step relationship of the best embodiment of the pressurized water reactor rod replacement control method provided by the present application;

[0049] Figure 3 This is a schematic diagram of control rod replacement of the best embodiment of the pressurized water reactor rod replacement control method provided by the present application;

[0050] Figure 4 It is a differential value relationship diagram of the best embodiment of the pressurized water reactor rod replacement control method provided by the present application;

[0051] Figure 5 It is a schematic diagram of differential value selection in the stable stage of the best embodiment of the pressurized water reactor rod replacement control method provided by the present application;

[0052] Figure 6 This is a schematic diagram of control rod speed variation of the best embodiment of the pressurized water reactor rod replacement control method provided by the present application;

[0053] Figure 7 It is a flow chart of the best embodiment of the pressurized water reactor rod replacement control method provided by the present application;

[0054] Figure 8 It is a structural schematic diagram of an embodiment of a pressurized water reactor rod replacement control system provided by the present application;

[0055] Fig. 9 It is a schematic diagram of the structure of an embodiment of the electronic device provided by the present application. DETAILED DESCRIPTION

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] During the operation of a pressurized water reactor, in order to reduce the burnup shadow effect caused by the long-term insertion of control rods into the core and to homogenize the burnup of the control rods themselves, the control rod sequence needs to be exchanged.

[0061] Since the two sets of control rods are located at different positions in the core, if the control rods at different positions are simultaneously raised or lowered by the same number of steps, the reactivity introduced to the PWR core will be different, thus causing greater disturbances in the PWR core.

[0062] The above-mentioned problem of causing greater disturbance in the core of a pressurized water reactor has not been solved. The present application proposes a pressurized water reactor rod replacement control method, system, electronic equipment and storage medium.

[0063] Reference Figure 1 , a flow chart of a pressurized water reactor rod replacement control method provided in an embodiment of the present application. The pressurized water reactor rod replacement control 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 control method may include the following steps:

[0064] Step 110: obtaining a differential value relationship of each group of control rods in the two groups of control rods, wherein the differential value relationship includes a corresponding relationship between a differential value of a corresponding group of control rods and an insertion step number of the group of control rods, wherein the differential value is used to characterize a reactivity change caused by a control rod moving a unit distance from different heights, and each group of control rods includes at least one control rod, and the two groups of control rods need to exchange insertion steps during the rod replacement process;

[0065] Step 120, based on the differential value relationship of each group of control rods, determining the average reactivity of the two groups of control rods per unit time;

[0066] Step 130, determining the number of movement steps of each group of control rods according to the average reactivity of each group of control rods;

[0067] Step 140, determining a target moving speed of each group of control rods according to the moving steps of each group of control rods;

[0068] Step 150: Control each group of control rods to change rods according to their corresponding target moving speeds.

[0069] In this embodiment, by obtaining the differential value relationship of each group of control rods in the two groups of control rods, the differential value relationship includes the corresponding relationship between the differential value of the corresponding group of control rods and the number of insertion steps of the group of control rods, the differential value is used to characterize the reactivity change caused by the control rods moving unit distance from different heights, each group of control rods includes at least one control rod, and the two groups of control rods need to exchange the number of insertion steps during the rod replacement process; based on the differential value relationship of each group of control rods, the average reactivity of the two groups of control rods in unit time is determined; according to the average reactivity of each group of control rods, the number of moving steps of each group of control rods is determined; according to the number of moving steps of each group of control rods, the target moving speed of each group of control rods is determined; and each group of control rods is controlled to change rods according to their corresponding target moving speeds. In this way, since the target moving speed of each group of control rods is determined according to the average reactivity of each group of control rods, each group of control rods is moved according to the target moving speed, so that the reactivity generated when the two groups of control rods are lifted up or inserted down at the same time can be offset as much as possible, so that the disturbance of the pressurized water reactor core can be reduced during the control rod replacement process.

[0070] In the above step 110, the differential value relationship of each group of control rods in the two groups of control rods is obtained. The differential value relationship includes the corresponding relationship between the differential value of a corresponding group of control rods and the number of insertion steps of the group of control rods. The differential value is used to characterize the reactivity change caused by the control rods moving a unit distance from different heights. Each group of control rods includes at least one control rod, and the two groups of control rods need to interchange the number of insertion steps during the rod replacement process.

[0071] The above reactivity can be a physical quantity reflecting the state of a nuclear reactor, and can be used to characterize the degree to which the reactor deviates from the critical state, that is, the relative offset of the effective multiplication factor k to the critical value 1.

[0072] The above-mentioned differential value relationship of each group of control rods in the two groups of control rods can be obtained according to the differential value of each group of control rods that changes with the number of insertion steps of the group of control rods.

[0073] The two groups of control rods need to interchange the number of insertion steps during the rod replacement process, which can be done by interchange the number of initial insertion steps of the two groups of control rods. For example, if the number of initial insertion steps of the first group of control rods is 120 and the number of insertion steps of the second group of control rods is 225, then after the interchange, the number of insertion steps of the first group of control rods is 225 and the number of insertion steps of the second group of control rods is 120.

[0074] In the above step 120, based on the differential value relationship of each group of control rods, the average reactivity of the two groups of control rods per unit time is determined.

[0075] The above method of determining the average reactivity of the two groups of control rods in unit time based on the differential value relationship of each group of control rods can be performed by first calculating the smooth moving average speed of the two groups of control rods (i.e. the average value of the smooth moving speeds of the two groups of control rods) according to the differential value relationship of each group of control rods, and then calculating the average reactivity of the two groups of control rods in unit time based on the smooth moving average speed.

[0076] The above-mentioned steady moving speed can be calculated based on the differential value in the differential value relationship of each group of control rods.

[0077] The above average reactivity can be the reactivity generated when the two groups of control rods move a certain position in a unit time. For example, in the same moving time, the first group of control rods moves from 120 insertion steps to 150 insertion steps, moves 30 steps, and generates a positive reactivity of 20. The second group of control rods moves from 225 insertion steps to 175 insertion steps, moves 50 steps, and generates a negative reactivity of 20. Then the average reactivity of the two groups of control rods is 20 divided by the moving time.

[0078] In the above step 130, the number of moving steps of each group of control rods is determined according to the average reactivity of each group of control rods.

[0079] The above-mentioned method of determining the number of moving steps of each group of control rods based on the average reactivity of each group of control rods may be based on the average reactivity of each group of control rods, and the total reactivity of each group of control rods after moving a certain number of steps may be obtained. In order to control the total reactivity of the two groups of control rods to offset each other, the number of moving steps of the two groups of control rods is controlled on the premise of ensuring that the total reactivity of the two groups of control rods can offset each other as much as possible.

[0080] For example, the first group of control rods moves from 120 insertion steps to 225 insertion steps to produce positive reactivity, and the second group of control rods moves from 225 insertion steps to 120 insertion steps to produce negative reactivity. In the process of changing the two groups of control rods, the positive reactivity and negative reactivity produced by the two groups of control rods are controlled to offset each other as much as possible.

[0081] In the above step 140, the target moving speed of each group of control rods is determined according to the moving steps of each group of control rods.

[0082] The target moving speed of each group of control rods is determined according to the moving steps of each group of control rods, and the target moving speed of each group of control rods is calculated according to the moving steps and moving time of each group of control rods.

[0083] For example, within the same moving time, the first group of control rods moves from 120 insertion steps to 150 insertion steps, moves 30 steps, and generates a positive reactivity of 20. The second group of control rods moves from 225 insertion steps to 175 insertion steps, moves 50 steps, and generates a negative reactivity of 20. Then the target moving speed of the first group of control rods moving from 120 insertion steps to 150 insertion steps is 30 divided by the moving time, and the first target moving speed is obtained. The target moving speed of the second group of control rods moving from 225 insertion steps to 175 insertion steps is 50 divided by the moving time, and the second target moving speed is obtained.

[0084] In the above step 150, each group of control rods is controlled to be replaced according to their corresponding target moving speeds.

[0085] The above control of replacing each group of control rods according to their respective corresponding target moving speeds may be due to the target moving speeds of each group of control rods being different, and therefore each group of control rods is replaced according to their respective corresponding target moving speeds.

[0086] For example, within the same moving time, the first group of control rods moves from the rod position interval of 120 insertion steps to the rod position interval of 150 insertion steps, and moves at the first target moving speed. The second group of control rods moves from the rod position interval of 225 insertion steps to the rod position interval of 175 insertion steps, and moves at the second target moving speed. In the rod position interval of 150 insertion steps to 175 insertion steps, the first group of control rods and the second group of control rods use the same moving speed, that is, the first group of control rods moves from the insertion steps of 150 to the insertion steps of 175, and the second group of control rods moves from the insertion steps of 175 to the insertion steps of 150. In the rod position interval of the first control rod moving from the insertion steps of 175 to the insertion steps of 225, the second target moving speed is used. The first group of control rods moves from the insertion steps of 150 to the rod position interval of 120 insertion steps, and moves at the first target moving speed. The rod replacement of the first group of control rods and the second group of control rods is completed.

[0087] For example, within the same moving time, the first group of control rods moves from 120 insertion steps to 160 insertion steps, moves 40 steps, and generates a positive reactivity of 25. The second group of control rods moves from 225 insertion steps to 160 insertion steps, moves 65 steps, and generates a negative reactivity of 25. Then, the target moving speed of the first group of control rods moving from 120 insertion steps to 160 insertion steps is 40 divided by the moving time, and the first target moving speed is obtained. The target moving speed of the second group of control rods moving from 225 insertion steps to 160 insertion steps is 65 divided by the moving time, and the second target moving speed is obtained.

[0088] Then, the first group of control rods moves from the rod position interval of 120 insertion steps to the rod position interval of 160 insertion steps, using the first target movement speed. The second group of control rods moves from the rod position interval of 225 insertion steps to the rod position interval of 160 insertion steps, using the second target movement speed. The first group of control rods moves from the rod position interval of 160 insertion steps to the rod position interval of 225 insertion steps, using the second target movement speed. The second group of control rods moves from the rod position interval of 160 insertion steps to the rod position interval of 120 insertion steps, using the first target movement speed. The replacement of the first group of control rods and the second group of control rods is completed.

[0089] In some embodiments, determining the average reactivity per unit time of two groups of control rods based on the differential value relationship of each group of control rods may include:

[0090] Obtaining an expected rod replacement time of each group of control rods and an integral value within the expected rod replacement time, wherein the integral value is used to characterize a reactivity change caused by each group of control rods moving from one rod position to another rod position within the expected rod replacement time;

[0091] Determining an average differential value of each group of control rods based on the differential value relationship of each group of control rods;

[0092] Determine the steady moving speed of each group of control rods based on the average differential value, integral value and estimated rod replacement time;

[0093] According to the steady moving speed of each group of control rods, the steady moving average speed of the two groups of control rods is determined;

[0094] Based on the steady moving average velocity, the average reactivity of the two groups of control rods per unit time is determined.

[0095] In this embodiment, the steady moving speed of each group of control rods is determined by using the average differential value, the integral value and the estimated rod replacement time, and then the steady moving average speed of the two groups of control rods is determined according to the steady moving speed of each group of control rods, and then the average reactivity of the two groups of control rods in unit time is determined according to the steady moving average speed. Since the calculated average reactivity of the two groups of control rods in unit time is equal, the positive reactivity and negative reactivity generated by the two groups of control rods can be offset as much as possible, and the determined steady moving speed of each group of control rods can ensure that the rod replacement speed remains stable as much as possible, thereby reducing the disturbance caused by the rod replacement.

[0096] The above-mentioned method of determining the average differential value of each group of control rods based on the differential value relationship of each group of control rods may be to obtain the differential value of each group of control rods at different insertion steps from the differential value relationship of each group of control rods, select the insertion steps within a certain range, obtain multiple differential values ​​of the insertion steps within the range, and average the multiple differential values ​​to obtain the average differential value. Alternatively, the method of obtaining the differential value of each group of control rods at different insertion steps from the differential value relationship of each group of control rods, select multiple differential values ​​within a certain range from the differential values ​​of different insertion steps, and average the multiple differential values ​​to obtain the average differential value.

[0097] The above-mentioned method of determining the average steady moving speed of the two groups of control rods according to the steady moving speed of each group of control rods may be to average the steady moving speeds of the two groups of control rods to obtain the average steady moving speed of the two groups of control rods.

[0098] The above-mentioned determination of the average reactivity of the two groups of control rods in unit time based on the steady moving average speed may be performed by performing a reciprocal calculation on the steady moving average speed to obtain the average reactivity of the two groups of control rods in unit time.

[0099] In some embodiments, determining an average differential value of each group of control rods based on the differential value relationship of each group of control rods may include:

[0100] According to the differential value relationship of each group of control rods, a target differential value range corresponding to each group of control rods is determined, and the differential value variation range in the target differential value range is within a preset range;

[0101] Calculate the average differential value for each set of control rods within their respective target differential value ranges.

[0102] In this embodiment, the target differential value range corresponding to each group of control rods is determined according to the differential value relationship of each group of control rods, and the differential value change amplitude in the target differential value range is within a preset range; then the average differential value of each group of control rods within their respective target differential value ranges is calculated. In this way, the average differential value is calculated by relatively stable differential values, which lays a good data foundation for the subsequent calculation of the target moving speed, thereby reducing the disturbance caused by rod replacement.

[0103] The differential value change range in the above-mentioned target differential value range is within a preset range. The preset range of the differential value change range can be artificially set based on historical experience to control the differential value change range in the target differential value range within the preset range.

[0104] The above calculation of the average differential value of each group of control rods within their respective target differential value range may be performed by obtaining multiple differential values ​​within the target differential value range, and then calculating the average differential value of each group of control rods within their respective target differential value range based on the multiple differential values.

[0105] In some embodiments, calculating the average differential value of each group of control rods within the respective target differential value range may include:

[0106] For each group of control rods, multiple differential values ​​within a target differential value range are selected from the differential value relationship;

[0107] Multiple differential values ​​are averaged to obtain the average differential value of each group of control rods within their respective target differential value ranges.

[0108] In this embodiment, by averaging multiple differential values, the average differential value of each group of control rods within their respective target differential value ranges is obtained, which can lay a good data foundation for the subsequent calculation of the target moving speed, thereby reducing the disturbance caused by rod replacement.

[0109] For each group of control rods, multiple differential values ​​within the target differential value range are selected from the differential value relationship. Since the differential value relationship corresponding to each group of control rods is different, multiple differential values ​​within the target differential value range can be selected from the differential value relationship of each group of control rods.

[0110] In some embodiments, determining the number of movement steps of each group of control rods according to the average reactivity of each group of control rods may include:

[0111] Obtain the initial rod position of each group of control rods;

[0112] The rod position intervals in the control rod replacement process are divided to obtain at least two rod position intervals arranged in a sequence of the rod position intervals, wherein the at least two rod position intervals include a first rod position interval arranged at the first position and a second rod position interval arranged at the last position, and the first rod position interval and the second rod position interval have equal interval reactivity;

[0113] According to the initial rod position of each group of control rods, determining one of a first rod position interval and a second rod position interval corresponding to each group of control rods;

[0114] According to the interval reactivity and the initial rod position of each group of control rods, the final rod position of each group of control rods in the corresponding rod position interval is obtained;

[0115] The number of movement steps of each group of control rods is determined based on the initial rod position and the final rod position.

[0116] In this embodiment, the rod position intervals of the control rod replacement process are divided to obtain at least two rod position intervals sorted in the order of the rod position intervals, and then one of the first rod position interval and the second rod position interval corresponding to each group of control rods is determined according to the initial rod position of each group of control rods; then, according to the interval reactivity and the initial rod position of each group of control rods, the final rod position of each group of control rods in the corresponding rod position interval is obtained; finally, according to the initial rod position and the final rod position, the number of moving steps of each group of control rods is determined. In this way, by controlling the interval reactivity of the first rod position interval and the second rod position interval to be equal, and finally determining the number of moving steps of each group of control rods, the reactivity generated by the rod replacement process of the two groups of control rods can be offset as much as possible, thereby reducing the disturbance generated by the rod replacement process.

[0117] The rod position intervals of the control rod replacement process are divided as described above to obtain at least two rod position intervals sorted in the order of the rod position intervals. The entire control rod replacement process can be divided into two intervals, or the entire control rod replacement process can be divided into three intervals, and then the rod position intervals are sorted according to the order of the number of insertion steps.

[0118] According to the initial rod positions of each group of control rods, one of the first rod position interval and the second rod position interval corresponding to each group of control rods is determined. When the entire control rod replacement process is divided into two intervals, the first interval is used as the first rod position interval, and the second interval is used as the second rod position interval. When each group of control rods moves to the corresponding interval, the corresponding first rod position interval or the second rod position interval is obtained. Alternatively, when the entire control rod replacement process is divided into three intervals, the first interval is used as the first rod position interval, and the last interval is used as the second rod position interval.

[0119] For example, the entire control rod replacement process of 120 to 225 insertion steps is divided into 120 to 160 insertion steps as the first rod position interval, and 160 to 225 insertion steps as the second rod position interval. When the first group of control rods moves from 120 insertion steps to 160 insertion steps, the first group of control rods is in the first rod position interval, and when the first group of control rods moves from 160 insertion steps to 225 insertion steps, the first group of control rods is in the second rod position interval. When the second group of control rods moves from 225 insertion steps to 160 insertion steps, the second group of control rods is in the second rod position interval, and when the second group of control rods moves from 160 insertion steps to 120 insertion steps, the second group of control rods is in the first rod position interval.

[0120] The above-mentioned interval reactivity may be the total reactivity corresponding to each interval divided into the entire control rod replacement process.

[0121] According to the interval reactivity and the initial rod position of each group of control rods, the final rod position of each group of control rods in the corresponding rod position interval is obtained. Since different insertion steps correspond to different differential values, and the differential value corresponds to reactivity, the initial rod position (i.e., the initial insertion step number) can be used to obtain the interval reactivity corresponding to the final rod position (i.e., the last insertion step number), and the final rod position of each group of control rods in the corresponding rod position interval can be obtained.

[0122] For example, the interval reactivity is 20. When the initial rod position of a group of control rods is 120 insertion steps, the reactivity generated when it moves to 125 insertion steps is 10, and the corresponding reactivity when it moves to 130 insertion steps is 20. Then the group of control rods will continue to move from 120 insertion steps to 130 insertion steps, and the final insertion steps are determined to be 130.

[0123] The above-mentioned method of determining the number of movement steps of each group of control rods according to the initial rod position and the final rod position may be to subtract the initial rod position from the final rod position to obtain the number of movement steps of each group of control rods.

[0124] In some embodiments, determining the target moving speed of each group of control rods according to the moving steps of each group of control rods may include:

[0125] According to the interval reactivity and average reactivity, the moving time of each group of control rods in the corresponding rod position interval is calculated;

[0126] According to the moving steps and moving time, the moving speed of each group of control rods in the corresponding rod position interval is calculated;

[0127] The ratio of the moving speed to the steady moving average speed is determined as the normalized speed change factor of each group of control rods in the corresponding first rod position interval, and the steady moving average speed is determined based on the differential value relationship of each group of control rods;

[0128] If the normalized speed change factor meets the preset conditions, the moving speed is used as the target moving speed of each group of control rods.

[0129] In this embodiment, firstly, the moving time of each group of control rods in the corresponding rod position interval is calculated according to the interval reactivity and the average reactivity; then, the moving speed of each group of control rods in the corresponding rod position interval is calculated according to the moving steps and the moving time, and then the ratio of the moving speed and the steady moving average speed is determined as the normalized speed change factor of each group of control rods in the corresponding first rod position interval, and the steady moving average speed is determined based on the differential value relationship of each group of control rods; finally, if the normalized speed change factor meets the preset conditions, the moving speed is used as the target moving speed of each group of control rods. In this way, since the interval reactivity of the rod position interval corresponding to each group of control rods is equal, and since the reactivity generated by the two groups of control rods in the rod changing process is a positive and negative relationship, it can be ensured that the interval reactivity generated by the two groups of control rods in the rod changing process offsets each other as much as possible, thereby reducing the disturbance generated in the rod changing process.

[0130] The moving time of each group of control rods in the corresponding rod position interval is calculated based on the interval reactivity and the average reactivity. Since the interval reactivity is the total reactivity and the average reactivity is the reactivity per unit time, the moving time of each group of control rods in the corresponding rod position interval can be calculated by dividing the interval reactivity by the average reactivity.

[0131] The moving speed of each group of control rods in the corresponding rod position interval is calculated based on the moving steps and the moving time. The moving speed of each group of control rods in the corresponding rod position interval can be calculated by dividing the moving steps by the moving time.

[0132] In some embodiments, if the normalized speed change factor satisfies a preset condition, taking the moving speed as the target moving speed of each group of control rods may include:

[0133] taking the absolute value of the difference between the normalized speed change factor and the pre-acquired first adjustment factor as the first fluctuation value;

[0134] Under the preset condition that the first fluctuation value is less than the pre-acquired second adjustment factor, the moving speed is used as the target moving speed of each group of control rods.

[0135] In this embodiment, the absolute value of the difference between the normalized speed change factor and the pre-acquired first adjustment factor is used as the first fluctuation value; under the preset condition that the first fluctuation value is less than the pre-acquired second adjustment factor, the moving speed is used as the target moving speed of each group of control rods. In this way, the normalized speed change factor is controlled within a suitable range according to the adjustment factor, that is, the moving speed of each group of control rods is controlled within a suitable range, so that the reactivity generated by the two groups of control rods can be offset each other, and the rod replacement speed can be kept stable, so that the disturbance generated during the rod replacement process is relatively small.

[0136] The first adjustment factor may be a threshold of a normalized speed change factor artificially set based on experience.

[0137] The second adjustment factor may be a fluctuation threshold of the first fluctuation value artificially set based on experience.

[0138] To facilitate understanding by those skilled in the art, a set of best embodiments is provided below:

[0139] 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 and to homogenize the burnup 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 control rod replacement sequence is T4-T3-T2-T1. The rod replacement operation is to switch the rod sequence between the initial rod sequence and the rod replacement sequence.

[0140] 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 .

[0141] 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 groups 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 (Axial Offset, A0).

[0142] An important reason for this disturbance is that the differential reactivity of control rods at different positions is different. Therefore, if control rods at different positions are simultaneously lifted and inserted for the same number of steps, the reactivity introduced to the core is different, thus causing disturbance to the core. To this end, this embodiment proposes a rod replacement strategy based on control rod reactivity: first, the differential value of a single rod group is calculated, and the rule for control rod movement during rod replacement is: the reactivity introduced by lifting and the negative reactivity introduced by inserting remain consistent.

[0143] Since the differential value of the control rod at different positions is different, this will cause the speed of the control rod to keep changing during the rod replacement process. In order to reduce the control rod movement and facilitate control, this embodiment also adopts a method based on a normalized speed change factor to filter the frequent control rod movements to obtain a relatively stable control rod movement rate.

[0144] The problem to be solved in this embodiment is: to address the core disturbance caused by synchronous rod replacement, an average speed rod replacement strategy based on the differential value of a single rod is proposed. Specifically, the following steps are included:

[0145] 1. Calculate the differential value of a single control rod.

[0146] The differential value of a single control rod group can be obtained through the core calculation software. The differential value is used to characterize the reactivity change caused by the control rod moving a unit distance from different heights. The relationship between the differential value and the control rod insertion step (i.e., the number of insertion steps) is as follows: Figure 4 shown.

[0147] 2. Based on the distribution of the differential value of each group of control rods with respect to the control rod position (i.e., control rod insertion step), find out the stage where the differential value is relatively stable, and use this as a benchmark to determine the reactivity changes brought about by the control rod action within a certain period of time.

[0148] Let the stable rod differential value (i.e. average differential value) of a rod group be k i In this embodiment, the single-rod differential value calculations are performed on T1 and T4 respectively, and the respective stable rod differential values ​​k1 and k4 can be obtained respectively. i Select as Figure 5 shown.

[0149] 3. According to the stable rod differential value k i (pcm / step), the estimated rod change time t(s), and the total integrated value of the control rods required for rod change s i (pcm), the steady action speed (i.e. steady moving speed) v of each group of control rods can be obtained i .

[0150]

[0151] Among them, v i The unit is step / s.

[0152] For the two control rod groups T1 and T4, the equivalent control rod steady action average speed (i.e. steady moving average speed) v is:

[0153]

[0154] Then the average reactivity introduced per unit time (i.e. average reactivity) is for:

[0155]

[0156] For a specific control rod position, we introduce The reactivity from b1 to b2 is:

[0157]

[0158] For the two sets of control rods, in order to make the introduced reactivity cancel each other out, that is, The starting point (i.e., initial rod position) b1 has been determined, and the end point (i.e., final rod position) b2 varies according to the change in total reactivity and has also been determined. If the fluctuation is too large, the normalized speed change factor is adjusted by appropriately adjusting t0, that is, adjusting b2.

[0159] Among them, b1 and b2 are introduced The rod position corresponding to the reactivity of (from b1 to b2), t0 is the time required to change from b1 to b2 (i.e., the moving time), v 0b represents the control rod moving speed at the current rod position b. Then we can know that the moving speed v of the current specific rod position 0b The difference expression is:

[0160]

[0161] Let the normalized velocity change factor be η, then:

[0162]

[0163] Through η, the speed variation in the current rod changing process can be known. η should be made to fluctuate within a small range around a certain value (i.e., the first adjustment factor) η0 as much as possible.

[0164] |η-η0|<ε

[0165] Among them, ε represents the second adjustment factor, which is a small positive number.

[0166] The whole rod replacement process should be divided into different rod position intervals to discuss the normalized speed change factor. For situations where the speed changes are drastic and frequent, select the appropriate rod position interval to analyze the normalized speed change factor so that the speed of the control rod is relatively constant during the rod replacement process.

[0167] In particular, for the entire control rod replacement process moving from b1 to b2, take b1 as the low rod position, T1 as the starting rod position, T4 as the terminal rod position, and b2 as the high rod position, T4 as the starting rod position, T1 as the terminal rod position, and take the rod replacement process The rod position interval is divided into two parts, the first half and the second half. In the first half, since T4 is at a high rod position and the differential value of the control rod is small, more steps are required to be aligned with the reactivity introduced by the T1 action. In the second half, since T1 moves to a high rod position, the differential value of the control rod becomes smaller, so T4 needs to slow down to correspond to the reactivity introduced by the T1 action. The speed change diagram of T1 and T4 is shown in the figure. Figure 6 shown.

[0168] 4. Evaluation criteria.

[0169] Evaluation criteria can be selected, but not limited to the following parameters:

[0170] Nuclear power fluctuation range: The nuclear power fluctuation range can be the fluctuation range of the core power measured in the nuclear pressurized water reactor core. The smaller the nuclear power fluctuation range, the better the solution.

[0171] Temperature fluctuation range: The temperature fluctuation range can be the fluctuation range of the temperature measured in the core of a nuclear pressurized water reactor. The smaller the temperature fluctuation range, the better the solution.

[0172] A0 fluctuation amplitude: that is, the fluctuation amplitude of the axial power offset. The smaller the fluctuation amplitude of the axial power offset, the better the solution.

[0173] A0 rod movement: that is, the rod movement of the axial power offset can be the up and down movement of the control rod during the rod replacement. The rod movement is used to measure the amplitude of the up and down movement of the control rod. The smaller the amplitude of the up and down movement of the control rod, the better the solution.

[0174] Rod replacement time: Rod replacement time can be the time for changing control rods. The shorter the control rod replacement time, the better the solution.

[0175] Normalized speed change factor: The closer the normalized speed change factor is to η0, the better the solution.

[0176] 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.

[0177] When multiple objectives are optimized, this embodiment adopts the weighted summation method:

[0178] If there are n evaluation criteria in total, the i-th evaluation criterion considered is a i , the corresponding weight is m i , then the solution score S is:

[0179]

[0180] The higher the score, the better the solution.

[0181] Reference Figure 7 In this embodiment, the normalized speed change factor is discussed for different rod position intervals during the control rod replacement process, so that the reactivity effects caused by the downward insertion and upward lifting during the rod replacement process offset each other, while trying to ensure that the rod replacement speed remains stable, so as to ensure that the rod replacement process has little impact on the operating state of the core (i.e., disturbance).

[0182] Reference Figure 8 , the embodiment of the present application proposes a pressurized water reactor rod replacement control system, which may include:

[0183] A data acquisition module 810 is used to acquire a differential value relationship of each control rod group in the two control rod groups, wherein the differential value relationship includes a corresponding relationship between a differential value of a corresponding control rod group and an insertion step number of the control rod group, wherein the differential value is used to characterize a reactivity change caused by a control rod group moving a unit distance from different heights, wherein each control rod group includes at least one control rod, and the two control rod groups need to exchange insertion steps during the rod replacement process;

[0184] A reactivity determination module 820 for determining an average reactivity per unit time of two groups of control rods based on a differential value relationship of each group of control rods;

[0185] A moving step number determination module 830, for determining the moving step number of each group of control rods according to the average reactivity of each group of control rods;

[0186] A moving speed determination module 840, for determining a target moving speed of each group of control rods according to the number of moving steps of each group of control rods;

[0187] The rod changing control module 850 is used to control each group of control rods to change rods according to their corresponding target moving speeds.

[0188] In some embodiments, the reactivity determination module 820 may be specifically configured to:

[0189] Obtaining an expected rod replacement time of each group of control rods and an integral value within the expected rod replacement time, wherein the integral value is used to characterize a reactivity change caused by each group of control rods moving from one rod position to another rod position within the expected rod replacement time;

[0190] Determining an average differential value of each group of control rods based on the differential value relationship of each group of control rods;

[0191] Determine the steady moving speed of each group of control rods based on the average differential value, integral value and estimated rod replacement time;

[0192] According to the steady moving speed of each group of control rods, the steady moving average speed of the two groups of control rods is determined;

[0193] Based on the steady moving average velocity, the average reactivity of the two groups of control rods per unit time is determined.

[0194] In some embodiments, the reactivity determination module 820 may be specifically configured to:

[0195] According to the differential value relationship of each group of control rods, a target differential value range corresponding to each group of control rods is determined, and the differential value variation range in the target differential value range is within a preset range;

[0196] Calculate the average differential value for each set of control rods within their respective target differential value ranges.

[0197] In some embodiments, the reactivity determination module 820 may be specifically configured to:

[0198] For each group of control rods, multiple differential values ​​within a target differential value range are selected from the differential value relationship;

[0199] Multiple differential values ​​are averaged to obtain the average differential value of each group of control rods within their respective target differential value ranges.

[0200] In some implementations, the moving step number determination module 830 may be specifically used to:

[0201] Obtain the initial rod position of each group of control rods;

[0202] The rod position intervals in the control rod replacement process are divided to obtain at least two rod position intervals arranged in a sequence of the rod position intervals, wherein the at least two rod position intervals include a first rod position interval arranged at the first position and a second rod position interval arranged at the last position, and the first rod position interval and the second rod position interval have equal interval reactivity;

[0203] According to the initial rod position of each group of control rods, determining one of a first rod position interval and a second rod position interval corresponding to each group of control rods;

[0204] According to the interval reactivity and the initial rod position of each group of control rods, the final rod position of each group of control rods in the corresponding rod position interval is obtained;

[0205] The number of movement steps of each group of control rods is determined based on the initial rod position and the final rod position.

[0206] In some implementations, the moving speed determination module 840 may be specifically configured to:

[0207] According to the interval reactivity and average reactivity, the moving time of each group of control rods in the corresponding rod position interval is calculated;

[0208] According to the moving steps and moving time, the moving speed of each group of control rods in the corresponding rod position interval is calculated;

[0209] The ratio of the moving speed to the steady moving average speed is determined as the normalized speed change factor of each group of control rods in the corresponding first rod position interval, and the steady moving average speed is determined based on the differential value relationship of each group of control rods;

[0210] If the normalized speed change factor meets the preset conditions, the moving speed is used as the target moving speed of each group of control rods.

[0211] In some implementations, the moving speed determination module 840 may be specifically configured to:

[0212] taking the absolute value of the difference between the normalized speed change factor and the pre-acquired first adjustment factor as the first fluctuation value;

[0213] Under the preset condition that the first fluctuation value is less than the pre-acquired second adjustment factor, the moving speed is used as the target moving speed of each group of control rods.

[0214] It should be noted that, since the pressurized water reactor rod replacement control system in this embodiment and the pressurized water reactor rod replacement control 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.

[0215] Reference Fig. 9 The embodiment of the present application further provides an electronic device, which may include:

[0216] at least one memory;

[0217] at least one processor;

[0218] at least one program;

[0219] The programs are stored in the memory, and the processor executes at least one program to implement the pressurized water reactor rod replacement control method implemented in the present disclosure.

[0220] The electronic device may be any intelligent terminal including a mobile phone, a tablet computer, a personal digital assistant (PDA), a car computer, etc.

[0221] The electronic device according to the embodiment of the present application is described in detail below.

[0222] The processor 910 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;

[0223] The memory 920 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 920 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 920, and the processor 910 calls and executes the pressurized water reactor rod replacement control method of the embodiment of the present disclosure.

[0224] Input / output interface 930, used to implement information input and output;

[0225] Communication interface 940, used to realize communication interaction between the device and other devices, which can be realized through wired mode (such as USB, network cable, etc.) or wireless mode (such as mobile network, WIFI, Bluetooth, etc.);

[0226] bus 950 , which transmits information between the various components of the device (e.g., processor 910 , memory 920 , input / output interface 930 , and communication interface 940 );

[0227] The processor 910 , the memory 920 , the input / output interface 930 , and the communication interface 940 are connected to each other in communication within the device via a bus 950 .

[0228] 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 control method.

[0229] 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.

[0230] 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.

[0231] 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.

[0232] 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.

[0233] 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.

[0234] 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.

[0235] 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.

[0236] 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.

[0237] 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.

[0238] 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.

[0239] 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 control method, characterized in that: The method comprises: Acquire a differential value relationship of each group of control rods in the two groups of control rods, the differential value relationship comprising a corresponding relationship between a differential value of a corresponding group of control rods and an insertion step number of the group of control rods, the differential value being used to characterize a reactivity change caused by a control rod moving a unit distance from different heights, each group of control rods comprising at least one control rod, and the two groups of control rods need to interchange insertion steps during a rod replacement process; determining an average reactivity per unit time of the two groups of control rods based on the differential value relationship of each group of control rods; determining the number of movement steps of each group of control rods according to the average reactivity of each group of control rods; determining a target moving speed of each group of control rods according to the moving steps of each group of control rods; Each group of control rods is controlled to change the rods according to the corresponding target moving speed.

2. The rod replacement control method for a pressurized water reactor according to claim 1, characterized in that: The determining the average reactivity of the two groups of control rods per unit time based on the differential value relationship of each group of control rods comprises: Acquire the expected rod replacement time of each group of control rods and the integral value within the expected rod replacement time, wherein the integral value is used to characterize the reactivity change caused by the movement of each group of control rods from one rod position to another rod position within the expected rod replacement time; determining an average differential value of each group of control rods based on the differential value relationship of each group of control rods; determining a steady moving speed of each group of control rods according to the average differential value, the integral value and the estimated rod replacement time; Determining an average steady moving speed of the two groups of control rods according to the steady moving speed of each group of control rods; The average reactivity of the two groups of control rods per unit time is determined based on the smooth moving average speed.

3. The rod replacement control method for a pressurized water reactor according to claim 2, characterized in that: Determining the average differential value of each group of control rods based on the differential value relationship of each group of control rods comprises: Determining a target differential value range corresponding to each group of control rods according to the differential value relationship of each group of control rods, wherein the differential value variation range in the target differential value range is within a preset range; The average differential value of each group of control rods within the respective target differential value range is calculated.

4. The rod replacement control method for a pressurized water reactor according to claim 3, characterized in that: The calculating the average differential value of each group of control rods within the respective target differential value ranges comprises: For each group of control rods, a plurality of differential values ​​within the target differential value range are selected from the differential value relationship; The multiple differential values ​​are averaged to obtain an average differential value of each group of control rods within their respective target differential value ranges.

5. The rod replacement control method for a pressurized water reactor according to claim 1, characterized in that: Determining the number of movement steps of each group of control rods according to the average reactivity of each group of control rods comprises: acquiring an initial rod position of each group of control rods; The rod position intervals in the control rod replacement process are divided to obtain at least two rod position intervals sorted in the order of the rod position intervals, wherein the at least two rod position intervals include a first rod position interval sorted first and a second rod position interval sorted last, and the first rod position interval and the second rod position interval have equal interval reactivity; According to the initial rod positions of each group of control rods, determining one of the first rod position interval and the second rod position interval corresponding to each group of control rods; According to the interval reactivity and the initial rod position of each group of control rods, obtaining the final rod position of each group of control rods in the corresponding rod position interval; The number of movement steps of each group of control rods is determined according to the initial rod position and the final rod position.

6. The rod replacement control method for a pressurized water reactor according to claim 5, characterized in that: Determining the target moving speed of each group of control rods according to the moving steps of each group of control rods includes: According to the interval reactivity and the average reactivity, the moving time of each group of control rods in the corresponding rod position interval is calculated; According to the moving steps and the moving time, a moving speed of each group of control rods in a corresponding rod position interval is calculated; Determine the ratio of the moving speed to the steady moving average speed as the normalized speed change factor of each group of control rods in the corresponding first rod position interval, wherein the steady moving average speed is determined based on the differential value relationship of each group of control rods; If the normalized speed change factor meets a preset condition, the moving speed is used as the target moving speed of each group of control rods.

7. The rod replacement control method for a pressurized water reactor according to claim 6, characterized in that: If the normalized speed change factor satisfies a preset condition, taking the moving speed as the target moving speed of each group of control rods comprises: taking the absolute value of the difference between the normalized speed change factor and the pre-acquired first adjustment factor as the first fluctuation value; When the preset condition is that the first fluctuation value is less than the pre-acquired second adjustment factor, the moving speed is used as the target moving speed of each group of control rods.

8. A pressurized water reactor rod replacement control system, characterized in that: The system comprises: a data acquisition module, used for acquiring a differential value relationship of each group of control rods in two groups of control rods, wherein the differential value relationship includes a corresponding relationship between a differential value of a corresponding group of control rods and an insertion step number of the group of control rods, wherein the differential value is used to characterize a reactivity change caused by a unit distance of the control rods moving from different heights, wherein each group of control rods includes at least one control rod, and the two groups of control rods need to exchange insertion steps during the rod replacement process; a reactivity determination module, configured to determine an average reactivity of the two groups of control rods per unit time based on a differential value relationship of each group of control rods; a moving step number determination module, used to determine the moving step number of each group of control rods according to the average reactivity of each group of control rods; A moving speed determination module, used to determine a target moving speed of each group of control rods according to the moving steps of each group of control rods; The rod changing control module is used to control each group of control rods to change rods according to their corresponding target moving speeds.

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 control 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 control method according to any one of claims 1 to 7.

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