Xenon strategy determination method, device, and computer equipment for transient analysis

Abstract

The present application relates to a method, device, and computer equipment for determining a xenon strategy for transient analysis. The method includes: determining a target final-state xenon strategy based on the final-state core power; determining a target variation range and a corresponding target initial-disturbance xenon strategy based on a target axial power deviation; and determining a target xenon strategy based on the target final-state xenon strategy and the target initial-disturbance xenon strategy. Since the xenon transient database includes a correspondence between xenon strategies and axial power deviation variation ranges, the xenon transient data can provide a wide range of axial power deviations for different fuel management schemes and reactor types. Moreover, in the process of determining the xenon strategy based on the variation range, it is easier to search for the target axial power deviation, avoiding repeated iterative calculations, and saving a lot of time and computing resources for transient analysis calculations. Moreover, it is possible to automatically select a suitable xenon transient and xenon strategy from the above-mentioned xenon transient database, avoiding manual adjustment of the xenon strategy, and improving the efficiency of transient analysis.

Description

Technical Field

[0001] The present application relates to the field of nuclear reactor technology, and in particular to a method, device, and computer equipment for determining a xenon strategy for transient analysis. Background Art

[0002] The sustainable development of nuclear power has a significant positive effect on environmental effects, driving local economic development, and improving public infrastructure. At the same time, it also puts forward higher requirements for the safety of nuclear power development. In a nuclear reactor, the fuel cladding is the first barrier to contain radioactive materials. The fuel cladding separates the fuel core from the coolant and can effectively prevent the leakage of radioactive materials. During the operation of a nuclear reactor, there will be transient increases in core power, which may cause fuel rod failure and release radioactive products in the fuel rod into the primary circuit system, increasing its radioactivity level and affecting the normal operation of the nuclear power plant. Therefore, the analysis of transient increases in core power is extremely important.

[0003] At present, the transient analysis of core power increase will construct a bad xenon distribution at the initial moment of the transient. The xenon distribution is generally set up with a xenon strategy based on previous engineering experience. The range of axial power deviation within a certain period of time is obtained according to the xenon strategy. If the target axial power deviation cannot be found within the range of axial power deviation, it takes a lot of time to construct a suitable xenon transient and repeat the calculation to search for the target axial power deviation.

[0004] Therefore, in the prior art, it is necessary to construct a xenon strategy based on the experience of engineers, which results in low efficiency of transient analysis. Summary of the invention

[0005] Based on this, it is necessary to provide a xenon strategy determination method, device, and computer equipment that can improve the efficiency of transient analysis in response to the above technical problems.

[0006] A xenon strategy determination method for transient analysis, the method comprising:

[0007] Determining a target final state xenon strategy from a xenon transient database according to calculation conditions; the xenon transient database includes a corresponding relationship between the xenon strategy and a variation range of the axial power deviation; the xenon strategy includes core power and control rod positions;

[0008] Determining a target variation range corresponding to the target axial power deviation from variation ranges of various axial power deviations in the xenon transient database according to the target axial power deviation;

[0009] Determine the target initial disturbance state xenon strategy corresponding to the target variation range from the xenon transient database;

[0010] The target xenon strategy is determined according to the target final-state xenon strategy and the target initial-perturbation-state xenon strategy.

[0011] In one embodiment, determining a target variation range corresponding to the target axial power deviation from the variation ranges of the axial power deviations in the xenon transient database according to the target axial power deviation includes:

[0012] According to the type of transient process and the target axial power deviation, a target variation range corresponding to the target axial power deviation is determined from the variation ranges of the axial power deviations in the xenon transient database, wherein the type of transient process indicates the variation trend of the target axial power deviation.

[0013] In one embodiment, the xenon transient database includes: a final state xenon strategy and an initial perturbation state xenon strategy; wherein,

[0014] The final xenon strategy includes the corresponding relationship between the final core power and the control rod position;

[0015] The initial perturbed xenon strategy includes an up-group xenon strategy and a down-group xenon strategy; the up-group xenon strategy includes a correspondence between an initial core power, a perturbed core power, an initial control rod position, a perturbed control rod position and a first range of variation of the axial power deviation; the down-group xenon strategy includes a correspondence between an initial core power, a perturbed core power, an initial control rod position, a perturbed control rod position and a second range of variation of the axial power deviation; the axial power deviation in the first range of variation shows an upward trend over time, and the axial power deviation in the second range of variation shows a downward trend over time.

[0016] In one embodiment, determining the target variation range corresponding to the target axial power deviation from the variation ranges of the axial power deviations in the xenon transient database according to the type of the transient process and the target axial power deviation includes:

[0017] If the type of the transient process is a transient in which the axial power deviation is getting smaller and smaller, determining a target variation range corresponding to the target axial power deviation from a downgrading strategy of the xenon transient database according to the target axial power deviation and a preset first transient selection principle;

[0018] The first xenon transient selection principle includes that the target axial power deviation is within the target variation range, and the ratio of the length of the target axial power deviation from the maximum value of the target variation range to the length of the target variation range is a preset threshold.

[0019] In one embodiment, determining the target variation range corresponding to the target axial power deviation from the variation ranges of the axial power deviations in the xenon transient database according to the type of the transient process and the target axial power deviation includes:

[0020] If the type of the transient process is a transient in which the axial power deviation is increasing, determining a target variation range corresponding to the target axial power deviation from the upgrading strategy of the transient database according to the target axial power deviation and a preset second transient selection principle;

[0021] The second xenon transient selection principle includes that the target axial power deviation is within the target variation range, and the ratio of the length of the target axial power deviation from the minimum value of the target variation range to the length of the target variation range is a preset threshold.

[0022] In one embodiment, the preset threshold is 1 / 3-2 / 3.

[0023] In one embodiment, determining a target variation range corresponding to the target axial power deviation from the variation ranges of the axial power deviations in the xenon transient database according to the target axial power deviation includes:

[0024] If the target axial power deviations are all outside the variation ranges of the axial power deviations in the xenon transient database, then obtaining the difference between the target axial power deviation and the extreme value of each variation range;

[0025] The variation range in which the absolute value of the difference is the smallest is determined as the target variation range corresponding to the target axial power deviation.

[0026] In one embodiment, if there are multiple target initial perturbation state strategies, determining the target strategy according to the target final state strategy and the target initial perturbation state strategy includes:

[0027] The target xenon strategy is determined according to the target final state xenon strategy and the target initial perturbation state xenon strategy with the deepest rod position.

[0028] A device for determining a xenon strategy for transient analysis, characterized in that the device comprises:

[0029] A first determination module is used to determine a target final state xenon strategy from a xenon transient database according to a calculation condition; the xenon transient database includes a correspondence between the xenon strategy and a variation range of the axial power deviation; the xenon strategy includes core power and control rod position;

[0030] A second determination module is used to determine a target variation range corresponding to the target axial power deviation from the variation ranges of the axial power deviations in the xenon transient database according to the target axial power deviation;

[0031] A third determination module is used to determine the target initial disturbance state xenon strategy corresponding to the target change range from the xenon transient database;

[0032] The fourth determination module is used to determine the target xenon strategy according to the target final-state xenon strategy and the target initial-disturbance-state xenon strategy.

[0033] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0034] Determining a target final-state xenon strategy from a xenon transient database according to calculation conditions; the xenon transient database includes a correspondence between core power, xenon strategy, and a variation range of axial power deviation;

[0035] Determining a target variation range corresponding to the target axial power deviation from variation ranges of various axial power deviations in the xenon transient database according to the target axial power deviation;

[0036] Determine the target initial disturbance state xenon strategy corresponding to the target variation range from the xenon transient database;

[0037] The target xenon strategy is determined according to the target final-state xenon strategy and the target initial-perturbation-state xenon strategy.

[0038] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the following steps:

[0039] Determining a target final state xenon strategy from a xenon transient database according to calculation conditions; the xenon transient database includes a corresponding relationship between the xenon strategy and a variation range of the axial power deviation; the xenon strategy includes core power and control rod positions;

[0040] Determining a target variation range corresponding to the target axial power deviation from variation ranges of various axial power deviations in the xenon transient database according to the target axial power deviation;

[0041] Determine the target initial disturbance state xenon strategy corresponding to the target variation range from the xenon transient database;

[0042] The target xenon strategy is determined according to the target final-state xenon strategy and the target initial-perturbation-state xenon strategy.

[0043] The above-mentioned xenon strategy determination method, device, and computer equipment for transient analysis determine the target final state xenon strategy from the xenon transient database according to the calculation conditions; determine the target change range corresponding to the target axial power deviation from the change range of each axial power deviation in the xenon transient database according to the target axial power deviation; determine the target initial perturbation state xenon strategy corresponding to the target change range from the xenon transient database; and determine the target xenon strategy according to the target final state xenon strategy and the target initial perturbation state xenon strategy. Since the xenon transient database includes the correspondence between the xenon strategy and the change range of the axial power deviation, the xenon transient data can provide a wide range of axial power deviations for different fuel management schemes and reactor types. Moreover, the change range of the axial power deviation determined based on the target axial power deviation in the present application, and the xenon strategy determined according to the change range, can more easily search for the target axial power deviation during use, greatly avoiding repeated iterative calculations, and saving a lot of time and computing resources for transient analysis calculations. Moreover, through this scheme, it is possible to automatically select the appropriate xenon transient and xenon strategy in the above-mentioned xenon transient database, avoid manual adjustment of the xenon strategy, improve the efficiency of transient analysis, and solve the problem of insufficient conservativeness in the selection of xenon transients and the introduction of human errors in the calculation results. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A diagram of an application environment of a xenon strategy determination method for transient analysis in one embodiment;

[0045] Figure 2 A schematic flow chart of a method for determining a xenon strategy for transient analysis in one embodiment;

[0046] Figure 3 A nuclear power plant operation boundary diagram in one embodiment;

[0047] Figure 4 A schematic diagram of the first xenon transient state selection principle in one embodiment;

[0048] Figure 5 A schematic diagram of the second xenon transient state selection principle in one embodiment;

[0049] Figure 6 A schematic diagram of a process for determining a target variation range in one embodiment;

[0050] Figure 7 A structural block diagram of a xenon strategy determination device for transient analysis in one embodiment;

[0051] Figure 8 A structural block diagram of a xenon strategy determination device for transient analysis in one embodiment;

[0052] Fig. 9 A structural block diagram of a xenon strategy determination device for transient analysis in one embodiment;

[0053] Fig.10 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0055] The xenon strategy determination method for PCI transient analysis provided in this application can be applied in a nuclear reactor application environment. Figure 1 As shown, the application environment includes a nuclear reactor 1, a detector 2 and a computer device 3. The detector is used to obtain the operating condition information of the nuclear reactor core and transmit the collected data to the computer device. The computer device calculates the collected data and determines the target final-state xenon strategy from the xenon transient database; determines the target variation range corresponding to the target axial power deviation from the variation range of each axial power deviation in the xenon transient database according to the target axial power deviation; determines the target initial disturbance state xenon strategy corresponding to the target variation range from the xenon transient database; and determines the target xenon strategy according to the target final-state xenon strategy and the target initial disturbance state xenon strategy.

[0056] In one embodiment, Figure 2 As shown, a xenon strategy determination method for PCI transient analysis is provided, and the method is applied to Figure 1 The computer device in the example is used to illustrate, including the following steps:

[0057] S201, determining a target final-state xenon strategy from a xenon transient database according to calculation conditions; the xenon transient database includes a correspondence between the xenon strategy and a variation range of the axial power deviation; the xenon strategy includes core power and control rod positions.

[0058] Among them, the core power is the average power in the core of the nuclear reactor, and the core power includes the final core power, the initial core power and the disturbed core power. The final core power is consistent with the core power of the calculated operating condition. The calculated operating condition is determined according to the possible operating state of the nuclear power plant. The final core power may or may not correspond to the control rod position. The initial and disturbed core powers are determined according to the operating conditions of the nuclear power plant, and they are used to construct the possible xenon transient state of the core.

[0059] Among them, the control rods are used to control the rate of the chain reaction at a predetermined level. They need to be made of neutron-absorbing materials to compensate for fuel consumption and adjust the reaction rate. As the control rods move in the reactor, the number of neutrons absorbed changes, thereby changing the reactivity of the reactor. The control rods are temperature control rods (R rods) and power compensation control rods (G\N rods). The control rod positions include the final control rod position corresponding to the final core power, the initial control rod position corresponding to the initial core power, and the disturbance control rod position corresponding to the disturbance state.

[0060] Among them, the axial power deviation △I is the difference between the power of the upper half of the core and the power of the lower half of the core, reflecting the degree of distortion of the axial power distribution. If this value exceeds a certain range, it will threaten the safety of the nuclear reactor. Nuclear power plants usually control the axial power deviation within the boundary range of the operation diagram, such as Figure 3 shown.

[0061] Among them, a typical calculation condition is determined from the actual operating state of the nuclear reactor as the target final state xenon strategy. The xenon transient database can determine the core power and control rod position variation range of the initial disturbance state and the final state in advance according to the possible operating conditions of the nuclear reactor core, and determine the possible final state xenon strategy and the initial disturbance state xenon strategy and calculate them to obtain different xenon transients. The calculation conditions include core power, R rod position, G\N rod position, which correspond to the final state xenon strategy one by one. Each xenon transient corresponds to a variation range of axial power deviation. The xenon transients obtained by all xenon strategies are collected and aggregated into a large-scale xenon transient database, which contains the variation range of axial power deviations corresponding to all xenon strategies. For example, different xenon strategies can be set, and the axial power deviation △I at different times can be obtained under each xenon strategy, so as to determine the corresponding relationship between each xenon strategy and the variation range of axial power deviation △I, and finally establish a xenon transient database.

[0062] Among them, the target final state xenon strategy includes the target final state core power and the target final state control rod position.

[0063] In this embodiment, different terminal core powers correspond to different control rod position combinations, and each set of terminal core powers and corresponding control rod positions form different terminal xenon strategies. The computer device can determine the terminal core power according to the actual operating condition calculation results, so as to determine the corresponding control rod position combination according to the terminal core power in the xenon transient database, thereby determining the target terminal xenon strategy.

[0064] S202: Determine a target variation range corresponding to the target axial power deviation from variation ranges of various axial power deviations in a xenon transient database according to the target axial power deviation.

[0065] Among them, the target axial power deviation can be based on Figure 3 The axial power deviation corresponding to any point on the operation boundary of the nuclear power plant can be determined as the target axial power deviation, or the axial power deviation corresponding to a point within the boundary in the operation boundary diagram of the nuclear power plant can be determined as the target axial power deviation.

[0066] In this embodiment, after determining the target axial power deviation, the target axial power deviation can be searched in the xenon transient database. At this time, the xenon transient database is a xenon transient database determined according to all combinations of the target final state xenon strategy and the initial perturbation state xenon strategy, or it can be a xenon transient database determined according to all combinations of the final state xenon strategy and the initial perturbation state xenon strategy, so as to determine the variation range corresponding to the xenon strategy where the target axial power deviation is located. For example, if the variation range of a certain xenon strategy includes the target axial power deviation, the variation range of the xenon strategy is determined as the target variation range. Alternatively, if the variation range of a certain xenon strategy includes the target axial power deviation, and the target axial power deviation is located at one-third of the maximum value of the variation range, or the target axial power deviation is located at the middle position of the variation range, then the variation range of the xenon strategy is determined as the target variation range. In the embodiment of the present application, only this distance is used for explanation, and it is not a limitation to the embodiment of the present application.

[0067] S203, determining a target initial disturbance state xenon strategy corresponding to the target change range from a xenon transient database.

[0068] Among them, the target initial perturbation state xenon strategy includes the target initial state core power, the target initial state control rod position, the target perturbation state core power and the target perturbation state control rod position.

[0069] In this embodiment, the xenon transient database includes the correspondence between the xenon strategy and the variation range of the axial power deviation. Therefore, after determining the target variation range corresponding to the target axial power deviation from the variation ranges of various axial power deviations in the xenon transient database according to the target axial power deviation, the target initial-disturbance xenon strategy corresponding to the target variation range can be determined according to the correspondence between the xenon strategy and the variation range of the axial power deviation.

[0070] S204, determining a target xenon strategy according to the target final-state xenon strategy and the target initial-disturbance-state xenon strategy.

[0071] In this embodiment, the target xenon strategy includes a target final-state xenon strategy and a target initial-perturbation-state xenon strategy, that is, the target final-state xenon strategy and the target initial-perturbation-state xenon strategy are combined together as the final target xenon strategy.

[0072] In the xenon strategy determination method for PCI transient analysis provided in the embodiment of the present application, the target final state xenon strategy is determined from the xenon transient database according to the final state calculation condition; the target variation range corresponding to the target axial power deviation is determined from the variation range of each axial power deviation in the xenon transient database according to the target axial power deviation; the target initial perturbation state xenon strategy corresponding to the target variation range is determined from the xenon transient database; the target xenon strategy is determined according to the target final state xenon strategy and the target initial perturbation state xenon strategy. Since the xenon transient database includes the correspondence between the xenon strategy and the variation range of the axial power deviation, the xenon transient data can provide a wide range of axial power deviations for different fuel management schemes and reactor types, and the variation range of the axial power deviation determined based on the target axial power deviation in the present application, and the xenon strategy determined according to the variation range can more easily search for the target axial power deviation during use, which greatly avoids repeated iterative calculations and saves a lot of time and computing resources for PCI transient analysis calculations. Moreover, this solution can realize automatic selection of appropriate xenon transients and xenon strategies in the above-mentioned xenon transient database, avoid manual adjustment of xenon strategies, improve the efficiency of PCI transient analysis, and solve the problems of insufficient conservativeness in xenon transient selection and human error in calculation results.

[0073] exist Figure 2 In the illustrated embodiment, a method for determining a xenon strategy for PCI transient analysis is mainly introduced. The following mainly introduces a specific implementation method for determining a target variation range corresponding to a target axial power deviation from a xenon transient database. The above step S202 may include: determining a target variation range corresponding to a target axial power deviation from variation ranges of respective axial power deviations in a xenon transient database according to a type of transient process and a target axial power deviation, wherein the type of transient process indicates a variation trend of the target axial power deviation.

[0074] In this embodiment, since the variation law of the axial power deviation is different in different PCI transient processes, it is necessary to select a xenon transient that is suitable for the variation range of the axial power deviation. The types of PCI transient processes can be transients with increasing axial power deviation or transients with decreasing axial power deviation. For example, in the PCI transient process, if the axial power deviation is increasing, the type of the transient process can be PCI transients with increasing axial power deviation. If the axial power deviation is decreasing, the type of the transient process can be PCI transients with decreasing axial power deviation. The target axial power deviation is determined on the nuclear power plant operation diagram. According to the target axial power deviation and the type of PCI transient process, the target variation range corresponding to the target axial power deviation is determined from the variation ranges of the axial power deviations in the xenon transient database.

[0075] Optionally, the xenon transient database includes: a final-state xenon strategy and an initial-perturbed-state xenon strategy; wherein the final-state xenon strategy includes the corresponding relationship between the final-state core power and the control rod position; the initial-perturbed-state xenon strategy includes an up-group xenon strategy and a down-group xenon strategy; the up-group xenon strategy includes the corresponding relationship between the initial-state core power, the perturbed-state core power, the initial-state control rod position, the perturbed-state control rod position and a first range of variation of the axial power deviation; the down-group xenon strategy includes the corresponding relationship between the initial-state core power, the perturbed-state core power, the initial-state control rod position, the perturbed-state control rod position and a second range of variation of the axial power deviation; the axial power deviation in the first range of variation shows an increasing trend over time, and the axial power deviation in the second range of variation shows a decreasing trend over time.

[0076] Among them, during the operation of the nuclear reactor, the change of the axial power deviation will not remain unchanged, but will change over time. For example, the axial power deviation will continue to increase in the first 8 hours, and will continue to decrease after 8 hours. Therefore, the range of change is obtained by selecting the change of the axial power deviation within a period of time in the xenon transient state.

[0077] In this embodiment, the final state xenon strategy is consistent with the calculated working condition, the final state R rod position can be set according to the calculated working condition to be at the insertion limit or outside the core, and the final state G, N rod positions can refer to the G9 curve of the calculated working condition or withdraw the core setting, and there is a one-to-one correspondence between the G, N rod positions and the core power (relative power) in the G9 curve. Taking the EQ cycle BLX of a fuel management scheme of a large pressurized water reactor as an example, the specific correspondence between the G, N rod positions and the power steps is as follows:

[0078] Table 1 Corresponding relationship of G9 curve

[0079]

[0080]

[0081] In this embodiment, there is no corresponding relationship between the final state G and N rod positions and the final state core power. As shown in Table 2, regardless of the final state core power, the G and N rod positions are pulled out of the core, and the R rod position is inserted into the core or pulled out of the core.

[0082] Table 2 Final xenon strategy

[0083]

[0084] In this embodiment, according to the calculation results of the final state xenon strategy and the initial perturbation state xenon strategy, multiple groups of different xenon transients can be obtained, corresponding to multiple groups of different axial power deviation change ranges. According to the change law of the axial power deviation after the xenon transient is constructed, within a certain range, the effects of raising the rod and reducing the power on △I are the same, and the effects of inserting the rod and increasing the power on the axial power deviation are the same, so different power and control rod position combinations are divided into the xenon strategy of raising the group and the xenon strategy of lowering the group. Taking the R rod as an example, as shown in Table 3 and Table 4, the R rod raising group xenon strategy in Table 3 is used as an example for explanation. The R rod raising group xenon strategy can be that the initial state core power is 1. If the perturbation state core power is 0, the initial state R rod position can be any one of the rod positions in 10-180, and the perturbation state R rod position is fixed to 0; if the perturbation state core power is 0.1, the initial state R rod position can also be any one of the rod positions in 10-180, and the perturbation state R rod position is fixed to 0. And so on.

[0085] Table 3 R rod upgrade group xenon strategy

[0086]

[0087] Table 4 R rod reduction group xenon strategy

[0088]

[0089]

[0090] In order to simplify the number of xenon transients, the xenon up-group strategy and xenon down-group strategy of the G and N rods and the xenon up-group strategy and xenon down-group strategy of the R rod are kept consistent and changed synchronously.

[0091] When the final state xenon strategy and the initial perturbation state xenon strategy are used to calculate and determine the xenon transient state, the final state control rod position is determined according to the final state core power. Taking the core power (relative power) in Table 1 equal to 0.8 as an example, the final state xenon strategy a1 is composed of the final state core power 0.8, the final state G1 rod position 71, the final state G2 rod position 196, the final state N1 rod position 225, the final state N2 rod position and the R rod position calculated according to the operating conditions; Taking Table 2 as an example, the initial perturbation state xenon strategies are b1, b2, b3...b n , the initial perturbed xenon strategy b1 is composed of R rod initial core power 1, perturbed core power 0, initial rod position 180, perturbed rod position 0, G rod initial core power 1, perturbed core power 0, initial rod position 180, perturbed rod position 0, and N rod initial core power 1, perturbed core power 0, initial rod position 180, perturbed rod position 0, initial perturbed xenon strategies b2, b3...b n And so on; the final state xenon strategy a1 is respectively related to the initial perturbation state xenon strategy b1, b2, b3...b nCalculation is performed to obtain n different xenon transient states. Therefore, when the final xenon strategy includes m, m*n xenon transient states are obtained.

[0092] In the embodiment of the present application, the constructed xenon transient database includes multiple xenon strategies (different combinations of initial, perturbed and final state core powers and R, G and N rods). Different xenon transients are obtained according to the multiple xenon strategies. Different xenon transients correspond to different axial power deviation variation ranges. A xenon transient database covering a wide range of axial power deviations can be constructed for different fuel management schemes and reactor types. There is no need to spend a lot of time to construct a suitable xenon transient, so that the corresponding xenon strategy can be determined from the database according to the selected axial power deviation variation range.

[0093] In the embodiments of the present application, the xenon transient database includes a final-state xenon strategy and an initial-disturbance-state xenon strategy, and the initial-disturbance-state xenon strategy includes an up-group xenon strategy and a down-group xenon strategy. The variation ranges corresponding to different xenon strategies in the xenon transient database can be selected according to the types of different transient processes, so that the xenon strategy corresponding to the variation range determined according to the target axial power deviation is more suitable for the current transient process.

[0094] Above Figure 2 The specific contents of the xenon transient database are mainly introduced. The following focuses on the specific implementation method of determining the target variation range corresponding to the target axial power deviation from the xenon transient database according to the type of transient process and the target axial power deviation.

[0095] The first method: if the type of the transient process is a PCI transient in which the axial power deviation becomes smaller and smaller, then according to the target axial power deviation and the preset first transient selection principle, the target variation range corresponding to the target axial power deviation is determined from the downgrading strategy of the transient database; wherein the first transient selection principle includes that the target axial power deviation is within the target variation range, and the ratio of the length of the target axial power deviation from the maximum value of the target variation range to the length of the target variation range is a preset threshold.

[0096] In this embodiment, the down-group xenon strategy is applied to search for the target axial power in the nuclear power plant operation diagram ( Figure 3 ) The type of transient process in actual working conditions is judged based on historical data and empirical knowledge. For transient processes with smaller and smaller axial power deviations, such as transients with excessive steam flow increase and boron dilution transients, the target variation range corresponding to the target axial power deviation is determined from the downshift strategy of the transient database based on the target axial power deviation and the preset first transient selection principle.

[0097] Optionally, the preset threshold is 1 / 3. It should be noted that the preset threshold may also be other values, such as 1 / 4, 2 / 5, and those skilled in the art may select according to actual needs, which is not limited in this application.

[0098] In this embodiment, if Figure 4 As shown, the type of xenon transient process is a transient in which the axial power deviation is getting smaller and smaller. The horizontal axis is time, and the vertical axis is the axial power deviation. As the nuclear reactor is running, the axial power deviation of the xenon transient continues to decrease. The target axial power deviation is 8, so according to the first xenon transient selection principle, the target change range corresponding to the target axial power deviation can be selected as [-22, 20]. For example, point A is the target axial power deviation. At the position where the axial power deviation is 8, it can be seen that the target axial power deviation is within the target change range [-22, 20]. The maximum length of the target variation range is 42, the maximum length of the target axial power deviation is 12, and the maximum length of the target axial power deviation target variation range is 1 / 3 of the length of the target variation range; the target axial power deviation is 8, then according to the first transient selection principle, the target variation range corresponding to the target axial power deviation can be selected as [-22, 20], and the target variation range [-22, 20] corresponds to two or more initial disturbance state strategies, different initial disturbance state strategies correspond to different core powers and control rod positions, and the initial disturbance state strategy with the deepest control rod insertion is selected as the target initial disturbance state strategy from the two or more initial disturbance state strategies corresponding to the target variation range [-22, 20], and the target strategy is determined according to the target final state strategy and the target initial disturbance state strategy with the deepest rod position.

[0099] The second method: if the type of the transient process is a PCI transient with an increasing axial power deviation, then according to the target axial power deviation and the preset second transient selection principle, the target variation range corresponding to the target axial power deviation is determined from the upgrading strategy of the transient database; wherein the second transient selection principle includes that the target axial power deviation is within the target variation range, and the ratio of the length of the target axial power deviation from the minimum value of the target variation range to the length of the target variation range is a preset threshold. Optionally, the preset threshold is 1 / 3.

[0100] In this embodiment, the strategy of upgrading the group is applied to search for the target axial power in the nuclear power plant operation diagram ( Figure 3 ) right boundary. The type of transient process in actual working conditions is judged based on historical data and empirical knowledge. For transient processes with increasing axial power deviation, such as rod drop transient and power-down uncontrolled rod lifting transient, the target change range corresponding to the target axial power deviation is determined from the upgrade strategy of the transient database according to the target axial power deviation and the preset second transient selection principle.

[0101] In this embodiment, if Figure 5 As shown, the type of xenon transient process is a PCI transient with increasing axial power deviation. The horizontal axis is time, and the vertical axis is the axial power deviation. As the nuclear reactor is running, the axial power deviation of the xenon transient continues to increase. The target axial power deviation is -10, so according to the second xenon transient selection principle, the target variation range corresponding to the target axial power deviation can be selected as [-22, 20]. For example, point A is the target axial power deviation. At the position where the axial power deviation is -10, it can be seen that the target axial power deviation is within the target variation range [-22, 20]. The maximum length of the target variation range is 42, the maximum length of the target axial power deviation is 12, and the maximum length of the target axial power deviation target variation range is 1 / 3 of the length of the target variation range; if the target axial power deviation is -10, then the target variation range corresponding to the target axial power deviation can be selected as [-22, 20] according to the second transient selection principle, and the target variation range of [-22, 20] corresponds to two or more target initial disturbance state strategies, and different initial disturbance state strategies correspond to different core powers and control rod positions. Among the two or more initial disturbance state strategies corresponding to the target variation range of [-22, 20], the initial disturbance state strategy with the deepest control rod insertion is selected as the target initial disturbance state strategy, and the target strategy is determined according to the target final state strategy and the target initial disturbance state strategy with the deepest rod position.

[0102] In this embodiment, according to the actual operating conditions of the nuclear reactor, the transient process types are divided into PCI transients with increasing axial power deviations and PCI transients with decreasing axial power deviations. Two different transient selection principles are defined for the two different transient process types, and a xenon transient database is established for different reactor types and fuel management schemes, which is more targeted in selecting appropriate xenon strategies.

[0103] Both of the above methods belong to the range of variation where the target axial power deviation is selected in the xenon transient database. However, in some scenarios, the target axial power deviation may not appear in any variation range in the xenon transient database. Figure 6 As shown, according to the type of transient process and the target axial power deviation, a specific implementation method for determining a target variation range corresponding to the target axial power deviation from a xenon transient database includes the following steps:

[0104] S601: If the target axial power deviations are all outside the variation ranges of the axial power deviations in the xenon transient database, then the difference between the target axial power deviations and the extreme values ​​of the variation ranges is obtained.

[0105] In this embodiment, if the target axial power deviation is -30, five xenon strategies A1, A2, A3, A4, and A5 are constructed respectively. The target variation ranges corresponding to the five xenon strategies are B1 [-10, 5], B2 [-20, 25], B3 [-15, 15], B4 [-5, 20], and B5 [-25, 20] respectively. It can be seen that the target axial power deviation is outside the variation range of each axial power deviation of the xenon transient database. For the above situation, the difference between the target axial power deviation and the extreme value of each variation range is obtained, and the extreme value includes the maximum value and the minimum value. The distance difference between the target axial power deviation and the maximum value and the minimum value of each variation range is calculated respectively, and a total of 10 differences are calculated. The differences corresponding to the five ranges are 20, -35; 10, -55; 15, -45; 25, -50; 5, -50, and the absolute values ​​of the differences are 20, 35; 10, 55; 15, 45; 25, 50; 5, 50

[0106] S602: Determine a variation range with a minimum absolute value of the difference as a target variation range corresponding to the target axial power deviation.

[0107] In this embodiment, according to step S601, the difference calculation results of the five xenon strategies A1, A2, A3, A4, and A5 are obtained respectively; the absolute values ​​of the 10 differences of the five xenon strategies are compared, and the xenon strategy with the minimum absolute value of the difference is determined as the target xenon strategy. For example: the absolute value of the minimum difference of the five xenon strategies A1, A2, A3, A4, and A5 is 5, and the target variation range corresponding to the absolute value of the minimum difference is B5 [-25, 20], then the corresponding target xenon strategy is A5.

[0108] In the embodiment of the present application, even if the target axial power deviation is outside the target variation range and the target axial power deviation cannot be searched within the target variation range, it can be ensured that the target variation range of the selected xenon transient is closest to the target axial power deviation, and a suitable xenon transient and xenon strategy are selected, thereby avoiding repeated iterative calculations caused thereby.

[0109] It should be understood that although Figure 2-6 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 2-6 At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0110] In one embodiment, Figure 7 As shown, a device for determining a xenon strategy for PCI transient analysis is provided, comprising: a first determining module 11, a second determining module 12, a third determining module 13 and a fourth determining module 14, wherein:

[0111] A first determination module 11 is used to determine a target final-state xenon strategy from a xenon transient database according to the final-state core power; the xenon transient database includes a correspondence between the xenon strategy and a variation range of the axial power deviation; the xenon strategy includes the core power and the control rod position;

[0112] A second determination module 12 is used to determine a target variation range corresponding to the target axial power deviation from the variation ranges of the axial power deviations in the xenon transient database according to the target axial power deviation;

[0113] A third determination module 13 is used to determine the target initial disturbance state xenon strategy corresponding to the target change range from the xenon transient database;

[0114] The fourth determination module 14 is used to determine a target xenon strategy according to the target final-state xenon strategy and the target initial-perturbation-state xenon strategy.

[0115] In one embodiment, Figure 8 As shown, the second determination module 12 includes:

[0116] The first determining unit 121 is used to determine a target variation range corresponding to the target axial power deviation from the variation ranges of the axial power deviations in the xenon transient database according to the type of the transient process and the target axial power deviation, wherein the type of the transient process represents a variation trend of the target axial power deviation.

[0117] In one embodiment, the final-state xenon strategy includes a corresponding relationship between a final-state core power and a control rod position; the initial-perturbed-state xenon strategy includes an up-group xenon strategy and a down-group xenon strategy; the up-group xenon strategy includes a corresponding relationship between an initial-state core power, a perturbed-state core power, an initial-state control rod position, a perturbed-state control rod position, and a first range of variation of an axial power deviation; the down-group xenon strategy includes a corresponding relationship between an initial-state core power, a perturbed-state core power, an initial-state control rod position, a perturbed-state control rod position, and a second range of variation of an axial power deviation; the axial power deviation in the first range of variation shows an increasing trend over time, and the axial power deviation in the second range of variation shows a decreasing trend over time.

[0118] In one embodiment, the determination unit 121 is used to determine, if the type of the transient process is a transient in which the axial power deviation becomes smaller and smaller, the target variation range corresponding to the target axial power deviation from the downgrading strategy of the xenon transient database according to the target axial power deviation and a preset first transient selection principle; wherein the first transient selection principle includes that the target axial power deviation is within the target variation range, and the ratio of the length of the target axial power deviation from the maximum value of the target variation range to the length of the target variation range is a preset threshold.

[0119] In one embodiment, the determining unit 121 is configured to determine, if the type of the transient process is a transient in which the axial power deviation is increasing, a target variation range corresponding to the target axial power deviation from an upgrade strategy of the xenon transient database according to the target axial power deviation and a preset second xenon transient selection principle;

[0120] The second xenon transient selection principle includes that the target axial power deviation is within the target variation range, and the ratio of the length of the target axial power deviation from the minimum value of the target variation range to the length of the target variation range is a preset threshold.

[0121] In one embodiment, the preset threshold is 1 / 3-2 / 3.

[0122] In one embodiment, the determination unit 121 is used to obtain the difference between the target axial power deviation and the extreme value of each variation range if the target axial power deviations are all outside the variation range of each axial power deviation in the xenon transient database; and determine the variation range with the smallest absolute value of the difference as the target variation range corresponding to the target axial power deviation.

[0123] In one embodiment, Fig. 9 As shown, the fourth determination module 14 includes:

[0124] The second determination unit 141 is used to determine the target strategy according to the target final state strategy and the target initial perturbation state strategy with the deepest rod position if there are multiple target initial perturbation state strategies.

[0125] The specific definition of the PCI transient analysis xenon strategy determination device can refer to the definition of the PCI transient analysis xenon strategy determination method above, which will not be repeated here. Each module in the above PCI transient analysis xenon strategy determination device can be implemented in whole or in part by software, hardware and a combination thereof. The above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0126] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Fig.10 As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a xenon strategy determination method is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0127] Those skilled in the art will understand that Fig.10 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0128] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0129] Determining a target final state xenon strategy from a xenon transient database according to calculation conditions; the xenon transient database includes a corresponding relationship between the xenon strategy and a variation range of the axial power deviation; the xenon strategy includes core power and control rod positions;

[0130] Determining a target variation range corresponding to the target axial power deviation from variation ranges of various axial power deviations in the xenon transient database according to the target axial power deviation;

[0131] Determine the target initial disturbance state xenon strategy corresponding to the target variation range from the xenon transient database;

[0132] The target xenon strategy is determined according to the target final-state xenon strategy and the target initial-perturbation-state xenon strategy.

[0133] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0134] According to the type of transient process and the target axial power deviation, a target variation range corresponding to the target axial power deviation is determined from the variation ranges of the axial power deviations in the xenon transient database, wherein the type of transient process indicates the variation trend of the target axial power deviation.

[0135] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0136] The final xenon strategy includes the corresponding relationship between the final core power and the control rod position;

[0137] The initial perturbed xenon strategy includes an up-group xenon strategy and a down-group xenon strategy; the up-group xenon strategy includes a correspondence between an initial core power, a perturbed core power, an initial control rod position, a perturbed control rod position and a first range of variation of the axial power deviation; the down-group xenon strategy includes a correspondence between an initial core power, a perturbed core power, an initial control rod position, a perturbed control rod position and a second range of variation of the axial power deviation; the axial power deviation in the first range of variation shows an upward trend over time, and the axial power deviation in the second range of variation shows a downward trend over time.

[0138] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0139] If the type of the transient process is a transient in which the axial power deviation is getting smaller and smaller, determining a target variation range corresponding to the target axial power deviation from a downgrading strategy of the xenon transient database according to the target axial power deviation and a preset first transient selection principle;

[0140] The first xenon transient selection principle includes that the target axial power deviation is within the target variation range, and the ratio of the length of the target axial power deviation from the maximum value of the target variation range to the length of the target variation range is a preset threshold.

[0141] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0142] If the type of the transient process is a transient in which the axial power deviation is increasing, determining a target variation range corresponding to the target axial power deviation from the upgrading strategy of the transient database according to the target axial power deviation and a preset second transient selection principle;

[0143] The second xenon transient selection principle includes that the target axial power deviation is within the target variation range, and the ratio of the length of the target axial power deviation from the minimum value of the target variation range to the length of the target variation range is a preset threshold.

[0144] In one embodiment, the preset threshold is 1 / 3-2 / 3.

[0145] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0146] If the target axial power deviations are all outside the variation ranges of the axial power deviations in the xenon transient database, then obtaining the difference between the target axial power deviation and the extreme value of each variation range;

[0147] The variation range with the smallest difference is determined as the target variation range corresponding to the target axial power deviation.

[0148] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0149] The target xenon strategy is determined according to the target final state xenon strategy and the target initial perturbation state xenon strategy with the deepest rod position.

[0150] In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0151] Determining a target final state xenon strategy from a xenon transient database according to calculation conditions; the xenon transient database includes a corresponding relationship between the xenon strategy and a variation range of the axial power deviation; the xenon strategy includes core power and control rod positions;

[0152] Determining a target variation range corresponding to the target axial power deviation from variation ranges of various axial power deviations in the xenon transient database according to the target axial power deviation;

[0153] Determine the target initial disturbance state xenon strategy corresponding to the target variation range from the xenon transient database;

[0154] The target xenon strategy is determined according to the target final-state xenon strategy and the target initial-perturbation-state xenon strategy.

[0155] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0156] According to the type of transient process and the target axial power deviation, a target variation range corresponding to the target axial power deviation is determined from the variation ranges of the axial power deviations in the xenon transient database, wherein the type of transient process indicates the variation trend of the target axial power deviation.

[0157] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0158] The final xenon strategy includes the corresponding relationship between the final core power and the control rod position;

[0159] The initial perturbed xenon strategy includes an up-group xenon strategy and a down-group xenon strategy; the up-group xenon strategy includes a correspondence between an initial core power, a perturbed core power, an initial control rod position, a perturbed control rod position and a first range of variation of the axial power deviation; the down-group xenon strategy includes a correspondence between an initial core power, a perturbed core power, an initial control rod position, a perturbed control rod position and a second range of variation of the axial power deviation; the axial power deviation in the first range of variation shows an upward trend over time, and the axial power deviation in the second range of variation shows a downward trend over time.

[0160] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0161] If the type of the transient process is a transient in which the axial power deviation is getting smaller and smaller, determining a target variation range corresponding to the target axial power deviation from a downgrading strategy of the xenon transient database according to the target axial power deviation and a preset first transient selection principle;

[0162] The first xenon transient selection principle includes that the target axial power deviation is within the target variation range, and the ratio of the length of the target axial power deviation from the maximum value of the target variation range to the length of the target variation range is a preset threshold.

[0163] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0164] If the type of the transient process is a transient in which the axial power deviation is increasing, determining a target variation range corresponding to the target axial power deviation from the upgrading strategy of the transient database according to the target axial power deviation and a preset second transient selection principle;

[0165] The second xenon transient selection principle includes that the target axial power deviation is within the target variation range, and the ratio of the length of the target axial power deviation from the minimum value of the target variation range to the length of the target variation range is a preset threshold.

[0166] In one embodiment, the preset threshold is 1 / 3-2 / 3.

[0167] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0168] If the target axial power deviations are all outside the variation ranges of the axial power deviations in the xenon transient database, then obtaining the difference between the target axial power deviation and the extreme value of each variation range;

[0169] The variation range in which the absolute value of the difference is the smallest is determined as the target variation range corresponding to the target axial power deviation.

[0170] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0171] The target xenon strategy is determined according to the target final state xenon strategy and the target initial perturbation state xenon strategy with the deepest rod position.

[0172] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0173] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0174] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A method for determining a xenon strategy for transient analysis, characterized in that: The method comprises: Determining a target final state xenon strategy from a xenon transient database according to calculation conditions; the xenon transient database includes a corresponding relationship between the xenon strategy and a variation range of the axial power deviation; the xenon strategy includes core power and control rod positions; Determining a target variation range corresponding to the target axial power deviation from variation ranges of various axial power deviations in the xenon transient database according to the target axial power deviation; Determine the target initial disturbance state xenon strategy corresponding to the target variation range from the xenon transient database; Determining a target xenon strategy according to the target final-state xenon strategy and the target initial-perturbation-state xenon strategy; The xenon transient database includes: a final state xenon strategy and an initial perturbation state xenon strategy; wherein, The final xenon strategy includes the corresponding relationship between the final core power and the control rod position; The initial perturbed xenon strategy includes an up-group xenon strategy and a down-group xenon strategy; the up-group xenon strategy includes a correspondence between an initial core power, a perturbed core power, an initial control rod position, a perturbed control rod position and a first range of variation of the axial power deviation; the down-group xenon strategy includes a correspondence between an initial core power, a perturbed core power, an initial control rod position, a perturbed control rod position and a second range of variation of the axial power deviation; the axial power deviation in the first range of variation shows an upward trend over time, and the axial power deviation in the second range of variation shows a downward trend over time.

2. The method according to claim 1, characterized in that The step of determining a target variation range corresponding to the target axial power deviation from the variation ranges of the axial power deviations in the xenon transient database according to the target axial power deviation includes: According to the type of transient process and the target axial power deviation, a target variation range corresponding to the target axial power deviation is determined from the variation ranges of the axial power deviations in the xenon transient database, wherein the type of transient process indicates the variation trend of the target axial power deviation.

3. The method according to claim 2, characterized in that The step of determining a target variation range corresponding to the target axial power deviation from the variation ranges of the axial power deviations in the xenon transient database according to the type of the transient process and the target axial power deviation comprises: If the type of the transient process is a transient in which the axial power deviation is getting smaller and smaller, determining a target variation range corresponding to the target axial power deviation from a downgrading strategy of the xenon transient database according to the target axial power deviation and a preset first transient selection principle; The first xenon transient selection principle includes that the target axial power deviation is within the target variation range, and the ratio of the length of the target axial power deviation from the maximum value of the target variation range to the length of the target variation range is a preset threshold.

4. The method according to claim 2, characterized in that: The step of determining a target variation range corresponding to the target axial power deviation from the variation ranges of the axial power deviations in the xenon transient database according to the type of the transient process and the target axial power deviation comprises: If the type of the transient process is a transient in which the axial power deviation is increasing, determining a target variation range corresponding to the target axial power deviation from the upgrading strategy of the transient database according to the target axial power deviation and a preset second transient selection principle; The second xenon transient selection principle includes that the target axial power deviation is within the target variation range, and the ratio of the length of the target axial power deviation from the minimum value of the target variation range to the length of the target variation range is a preset threshold.

5. The method according to claim 3 or 4, characterized in that: The preset threshold is 1 / 3-2 / 3.

6. The method according to claim 2, characterized in that The step of determining a target variation range corresponding to the target axial power deviation from the variation ranges of the axial power deviations in the xenon transient database according to the target axial power deviation includes: If the target axial power deviations are all outside the variation ranges of the axial power deviations in the xenon transient database, then obtaining the difference between the target axial power deviation and the extreme value of each variation range; The variation range in which the absolute value of the difference is the smallest is determined as the target variation range corresponding to the target axial power deviation.

7. The method according to claim 1, characterized in that If there are multiple target initial perturbation state strategies, determining the target strategy according to the target final state strategy and the target initial perturbation state strategy includes: The target xenon strategy is determined according to the target final state xenon strategy and the target initial perturbation state xenon strategy with the deepest rod position.

8. A xenon strategy determination device for transient analysis, characterized in that: The device comprises: A first determination module is used to determine a target final-state xenon strategy from a xenon transient database according to a final-state core power; the xenon transient database includes a correspondence between the xenon strategy and a variation range of the axial power deviation; the xenon strategy includes the core power and the control rod position; A second determination module is used to determine a target variation range corresponding to the target axial power deviation from the variation ranges of the axial power deviations in the xenon transient database according to the target axial power deviation; A third determination module is used to determine the target initial disturbance state xenon strategy corresponding to the target change range from the xenon transient database; A fourth determination module, configured to determine a target xenon strategy according to the target final-state xenon strategy and the target initial-disturbance-state xenon strategy; The xenon transient database includes: a final state xenon strategy and an initial perturbation state xenon strategy; wherein, The final xenon strategy includes the corresponding relationship between the final core power and the control rod position; The initial perturbed xenon strategy includes an up-group xenon strategy and a down-group xenon strategy; the up-group xenon strategy includes a correspondence between an initial core power, a perturbed core power, an initial control rod position, a perturbed control rod position and a first range of variation of the axial power deviation; the down-group xenon strategy includes a correspondence between an initial core power, a perturbed core power, an initial control rod position, a perturbed control rod position and a second range of variation of the axial power deviation; the axial power deviation in the first range of variation shows an upward trend over time, and the axial power deviation in the second range of variation shows a downward trend over time.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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