Method and device for optimizing quadrant power tilt of reactor core of reactor
By obtaining the theoretical and measured power levels of the reactor, determining the target water gap distribution and optimizing the core loading plan, the problem of difficult quantitative judgment of core power tilt was solved, and effective suppression and optimization of reactor power tilt was achieved.
Patent Information
- Application Number
- CN202510665140.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-22
- Publication Date
- 2025-09-05
AI Technical Summary
Existing technologies are unable to accurately and quantitatively determine the power tilt phenomenon of a nuclear reactor before core startup, making it difficult to obtain a core loading plan that does not cause power tilt.
By obtaining the theoretical power level and measured power level of each component of the reactor under historical cycles, the target water gap distribution is determined. The quadrant power tilt of the core loading scheme is predicted based on the target water gap distribution. The core quadrant power tilt is optimized to obtain the target loading scheme.
It achieves early quantitative prediction and targeted suppression of reactor power tilt, alleviates the quadrant power tilt problem during unit operation, and ensures the safety and economy of the core.
Smart Images
Figure CN120600366A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of reactor physics technology, and in particular to a method and device for optimizing the core quadrant power tilt of a reactor. Background Art
[0002] After a period of operation, a nuclear reactor may no longer be able to provide sufficient fission nuclides due to fuel consumption. Therefore, it is necessary to shut down the reactor to remove some old assemblies and replace them with new ones. Loading fuel assemblies places high demands on the positioning of the new and old assemblies, and a new loading plan must be determined after carefully considering various issues and conditions.
[0003] Typically, a nuclear reactor core adopts a symmetrical design, and theoretical calculations indicate that the power distribution in each quadrant should be symmetrical. However, due to the combined influence of various uncertainties, the actual power level during actual operation inevitably deviates from the theoretically calculated results, causing quadrant power tilt in the nuclear reactor. Existing technologies cannot accurately and quantitatively determine the core power tilt phenomenon before core startup, making it difficult to accurately determine the core loading plan for a reactor that does not experience power tilt. Summary of the Invention
[0004] Based on this, it is necessary to provide a method and device for optimizing the core quadrant power tilt of a reactor, which can accurately obtain a core loading scheme of a reactor with a better power tilt amount, in order to address the above technical problems.
[0005] In a first aspect, the present application provides a method for optimizing core quadrant power tilting of a reactor. The method comprises:
[0006] Obtain the theoretical power level and measured power level of each component of the reactor under historical cycles;
[0007] determining a target water gap distribution according to the theoretical power level and the measured power level;
[0008] predicting a core quadrant power tilt of a core loading scheme of the reactor according to the target water gap distribution;
[0009] The core loading scheme is optimized by core quadrant power tilt according to the core quadrant power tilt amount to obtain a target loading scheme.
[0010] In one embodiment, predicting the core quadrant power tilt of the core loading scheme of the reactor according to the target water gap distribution includes:
[0011] applying the target water gap distribution to a core loading scheme of the reactor, and obtaining a predicted power level corresponding to the core loading scheme after applying the target water gap distribution;
[0012] The tilt amount of the core loading scheme is predicted according to the predicted power level to obtain the core quadrant power tilt amount of the core loading scheme of the reactor.
[0013] In one embodiment, the performing core quadrant power tilt optimization on the core loading plan according to the core quadrant power tilt amount to obtain a target loading plan includes:
[0014] If the core quadrant power tilt amount is less than the core quadrant power tilt amount threshold, taking the core loading plan as a target loading plan;
[0015] If the core quadrant power tilt amount is not less than the core quadrant power tilt amount threshold, the core quadrant power tilt optimization is performed on the core loading plan of the reactor to obtain a target loading plan.
[0016] In one embodiment, obtaining the theoretical power level and the measured power level of each component of the reactor under historical cycles includes:
[0017] Obtain the burnup depth of the reactor's fuel assemblies in historical cycles;
[0018] The theoretical power level and the measured power level of each component of the reactor under historical cycles after optimizing the burnup of the reactor according to the fuel depth are obtained.
[0019] In one embodiment, obtaining the theoretical power level and the measured power level of each component of the reactor under historical cycles includes:
[0020] Conduct flux diagram test measurements on each component of the reactor under historical cycles to obtain the measured power levels of each component under historical cycles;
[0021] Theoretical simulation of the reactor under historical cycles is carried out to obtain the theoretical power level of each component of the reactor under historical cycles.
[0022] In one embodiment, determining the target water gap distribution according to the theoretical power level and the measured power level includes:
[0023] determining a power difference between the theoretical power level and the measured power level of the reactor corresponding to the initial water gap distribution;
[0024] A target water gap distribution is determined according to the power difference.
[0025] In one embodiment, determining the target water gap distribution according to the power difference includes:
[0026] Verifying a magnitude relationship between the power difference and a preset difference threshold;
[0027] If the power difference is smaller than the difference threshold, the initial water gap distribution is used as the target water gap distribution.
[0028] In one embodiment, the method further comprises:
[0029] If the power difference is not less than the difference threshold, the initial water gap distribution is adjusted to obtain an adjusted initial water gap distribution;
[0030] The adjusted initial water gap distribution is used as a new initial water gap distribution, and based on the new initial water gap distribution, the step of determining the power difference between the theoretical power level and the measured power level of the reactor under the corresponding initial water gap distribution is returned to, until the target water gap distribution is determined.
[0031] In one embodiment, the difference threshold is zero.
[0032] In a second aspect, the present application also provides a reactor core quadrant power tilt optimization device. The device comprises:
[0033] An acquisition module, used to obtain the theoretical power level and measured power level of each component of the reactor under historical cycles;
[0034] a determination module, configured to determine a target water gap distribution according to the theoretical power level and the measured power level;
[0035] a prediction model for predicting a core quadrant power tilt of a core loading scheme of the reactor based on the target water gap distribution;
[0036] An adjustment module is used to optimize the core quadrant power tilt of the core loading plan according to the core quadrant power tilt amount to obtain a target loading plan.
[0037] In a third aspect, the present application further provides a computer device. The computer device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are performed:
[0038] Obtain the theoretical power level and measured power level of each component of the reactor under historical cycles;
[0039] determining a target water gap distribution according to the theoretical power level and the measured power level;
[0040] predicting a core quadrant power tilt of a core loading scheme of the reactor according to the target water gap distribution;
[0041] The core loading scheme is optimized by core quadrant power tilt according to the core quadrant power tilt amount to obtain a target loading scheme.
[0042] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the following steps:
[0043] Obtain the theoretical power level and measured power level of each component of the reactor under historical cycles;
[0044] determining a target water gap distribution according to the theoretical power level and the measured power level;
[0045] predicting a core quadrant power tilt of a core loading scheme of the reactor according to the target water gap distribution;
[0046] The core loading scheme is optimized by core quadrant power tilt according to the core quadrant power tilt amount to obtain a target loading scheme.
[0047] In a fifth aspect, the present application further provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the following steps:
[0048] Obtain the theoretical power level and measured power level of each component of the reactor under historical cycles;
[0049] determining a target water gap distribution according to the theoretical power level and the measured power level;
[0050] predicting a core quadrant power tilt of a core loading scheme of the reactor according to the target water gap distribution;
[0051] The core loading scheme is optimized by core quadrant power tilt according to the core quadrant power tilt amount to obtain a target loading scheme.
[0052] The above-mentioned method and device for optimizing the core quadrant power tilt of the reactor are implemented by obtaining the theoretical power level and the measured power level of each component of the reactor under the historical cycle, as well as the target water gap distribution; realizing the prediction of the core quadrant power tilt of the core loading scheme of the reactor according to the target water gap distribution; optimizing the core quadrant power tilt of the core loading scheme according to the core quadrant power tilt to obtain the target loading scheme. According to the above content, it can be seen that in the process of determining the target loading scheme, the present application quantitatively predicts the quadrant power tilt state after the start of the next cycle by the deviation level between the theoretical power and the measured power of the historical cycle; furthermore, determines the target water gap distribution according to the predicted quadrant power tilt state after the start of the previous cycle; and realizes the early quantitative prediction and targeted suppression of the quadrant power tilt by the model parameters of the target theoretical model of the reactor through the target water gap distribution, thereby alleviating the quadrant power tilt problem during the operation of the unit and effectively suppressing the power tilt phenomenon of the reactor. BRIEF DESCRIPTION OF THE DRAWINGS
[0053] Figure 1 This is a diagram illustrating an application environment of a reactor core quadrant power tilt optimization method provided in an embodiment of the present application;
[0054] Figure 2 A schematic flow chart of a first reactor core quadrant power tilt optimization method provided in an embodiment of the present application;
[0055] Figure 3 A schematic flow chart of a second reactor core quadrant power tilt optimization method provided in an embodiment of the present application;
[0056] Figure 4 A schematic flow chart of a third reactor core quadrant power tilt optimization method provided in an embodiment of the present application;
[0057] Figure 5 A schematic flow chart of a fourth reactor core quadrant power tilt optimization method provided in an embodiment of the present application;
[0058] Figure 6 A schematic flow chart of a fifth reactor core quadrant power tilt optimization method provided in an embodiment of the present application;
[0059] Figure 7 A schematic diagram of the first type of core quadrant power tilt provided in an embodiment of the present application;
[0060] Figure 8 A schematic diagram of the first measured power core quadrant power tilt provided in an embodiment of the present application;
[0061] Figure 9 A schematic diagram of the second measured power core quadrant power tilt provided in an embodiment of the present application;
[0062] Figure 10 A schematic diagram of the second type of core quadrant power tilt provided in an embodiment of the present application;
[0063] Figure 11 A schematic diagram of the third type of measured power core quadrant power tilt provided in an embodiment of the present application;
[0064] Figure 12 A structural block diagram of a reactor core quadrant power tilt optimization device provided in an embodiment of the present application;
[0065] Figure 13 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION
[0066] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.
[0067] After a period of operation, a nuclear reactor may no longer be able to provide sufficient fission nuclides due to fuel consumption. Therefore, it is necessary to shut down the reactor to remove some old assemblies and replace them with new ones. Loading fuel assemblies places high demands on the positioning of the new and old assemblies, and a new loading plan must be determined after carefully considering various issues and conditions.
[0068] Core power tilt (TILT) refers to the asymmetry of power between quadrants during core operation. It is a widespread phenomenon in pressurized water reactor cores and a long-standing challenge in core operation and fuel management. The factors causing TILT are numerous and complex, involving the interplay of core neutronics, thermal engineering, and fuel physics, making it difficult to pinpoint its root cause in practical engineering. Determining the current core power tilt state primarily relies on regular detector measurements.
[0069] Core quadrant power tilt (dimensionless):
[0070]
[0071] Where Pi (i = 1, 2, 3, 4) represents the average power level in each quadrant; P (avg) represents the average power level of the entire reactor; that is, the core TILT is the ratio of the average power of the largest quadrant to the average power level of the entire reactor.
[0072] Core quadrant power tilt refers to an asymmetric power level across the core's quadrants, with some areas exhibiting higher power levels. Typically, a core is designed symmetrically, and theoretical calculations indicate a symmetrical power distribution across the quadrants. However, due to the combined influence of various uncertainties, actual power levels inevitably deviate from theoretical calculations during core operation, leading to quadrant power tilt. This refers to a systematic, regional deviation between theoretically calculated and actual core power.
[0073] After the core is started, it is difficult to carry out effective control of the power tilt state. Once the value exceeds the limit, it will restrict the safety and economy of the core operation. Therefore, the control of power tilt mainly relies on the adjustment of the loading scheme in the refueling design stage (before the core is started). In the existing technology, the consideration of power tilt in the refueling design stage is mainly based on historical experience. By consciously and qualitatively evaluating the possible power tilt state, and adjusting the core loading plan, this possible trend is deliberately suppressed. Since it is impossible to accurately and quantitatively judge the power tilt phenomenon of the core before the core is started, it is difficult to accurately obtain the core loading plan of the reactor where the power tilt phenomenon does not occur.
[0074] The reactor core quadrant power tilt optimization method provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown. Among them, the terminal 102 communicates with the server 104 through the network. The data storage system can store the data that the server 104 needs to process. The data storage system can be integrated on the server 104, or it can be placed on the cloud or other network servers. By obtaining the theoretical power level and the measured power level of each component of the reactor under the historical cycle, as well as the target water gap distribution; the core quadrant power tilt optimization of the core loading scheme of the reactor is implemented according to the target water gap distribution to obtain the target loading scheme. Among them, the terminal 102 can be but is not limited to various personal computers, laptops, smart phones, tablets, Internet of Things devices and portable wearable devices. The Internet of Things devices can be smart speakers, smart TVs, smart air conditioners, smart car-mounted devices, etc. Portable wearable devices can be smart watches, smart bracelets, head-mounted devices, etc. The server 104 can be implemented with an independent server or a server cluster consisting of multiple servers.
[0075] In one embodiment, Figure 2 As shown, a reactor core quadrant power tilt optimization method is provided, and the method is applied to Figure 1 Taking the server 104 in the example as an example, the following steps are included:
[0076] S201, obtaining the theoretical power level and the measured power level of each component of the reactor under historical cycles.
[0077] It should be noted that when it is necessary to obtain the theoretical power level and measured power level of each component of the reactor under historical cycles, the reactor can be optimized for fuel consumption to prevent abnormal power levels caused by fuel consumption; then, the theoretical power level and measured power level after fuel consumption optimization can be statistically analyzed.
[0078] S202: Determine a target water gap distribution according to the theoretical power level and the measured power level.
[0079] It should be noted that in a pressurized water reactor, the gaps between fuel assemblies are filled with water. Therefore, the water gap distribution can effectively reflect the water filling conditions between fuel assemblies. Among them, the target water gap distribution can be determined by the water gap conditions of a pre-constructed core theoretical model.
[0080] Furthermore, the water gap distribution is used as the sole parameter to measure the deviation between the theoretical power level and the measured power level (separation effect). Therefore, the water gap distribution of the theoretical core model is used to change the current theoretical power level to align it with the measured power level. The target water gap distribution is then used as the water gap distribution of the theoretical core model when the theoretical and measured power levels are aligned.
[0081] S203 , predicting the core quadrant power tilt of the core loading scheme of the reactor according to the target water gap distribution.
[0082] It should be noted that when it is necessary to predict the core quadrant power tilt of the core loading scheme of the reactor, the target water gap distribution can be applied to the core loading scheme of the reactor, and then, by applying the core loading scheme of the target water gap distribution, the core quadrant power tilt of the core loading scheme can be predicted.
[0083] In one embodiment of the present application, when it is necessary to apply the target water gap distribution to the core loading scheme of the reactor, it can be pre-defaulted that the in-core environmental factors corresponding to the target water gap distribution are the same as the in-core environmental factors corresponding to the core loading scheme; therefore, the initial water gap distribution of the core loading scheme can be directly adjusted to make the initial water gap distribution of the core loading scheme the same as the target water gap distribution, thereby realizing the application of the target water gap distribution to the core loading scheme of the reactor.
[0084] In another embodiment of the present application, since the target water gap distribution is based on the theoretical power level and the measured power level of each component under the historical cycle, the in-pile environmental factors corresponding to the target water gap distribution are the in-pile environmental factors under the historical cycle, and the in-pile environmental factors corresponding to the core loading scheme are the in-pile environmental factors of the next cycle. Therefore, the target water gap distribution can be adaptively adjusted based on the difference between the in-pile environmental factors of the historical cycle and the in-pile environmental factors of the next cycle to ensure that the adjusted target water gap distribution can be applicable to the in-pile environmental factors of the next cycle, and then the initial water gap distribution of the core loading scheme is distributed and adjusted so that the initial water gap distribution of the core loading scheme is the same as the adjusted target water gap distribution, thereby realizing the application of the target water gap distribution to the core loading scheme of the reactor.
[0085] In summary, there are many methods for applying the target water gap distribution in the core loading scheme, and the application and inheritance form of the target water gap distribution are not limited here.
[0086] As an example, the water gap distribution of a core loading scheme can be shown in the following table, where the core loading scheme includes ten components:
[0087]
[0088]
[0089] S204 , optimizing the core quadrant power tilt of the core loading plan according to the core quadrant power tilt amount to obtain a target loading plan.
[0090] It should be noted that when it is necessary to optimize the core quadrant power tilt of the reactor core loading plan according to the core quadrant power tilt amount to obtain a target loading plan, it may include the following contents: verifying the size relationship between the core quadrant power tilt amount and the preset core quadrant power tilt amount threshold; if the core quadrant power tilt amount is less than the core quadrant power tilt amount threshold, then the core loading plan is used as the target loading plan; if the core quadrant power tilt amount is not less than the core quadrant power tilt amount threshold, then the core quadrant power tilt of the reactor core loading plan is optimized by adjusting the arrangement position of the fuel assembly to obtain a target loading plan.
[0091] Among them, the core quadrant power tilt threshold can be selected based on the unit operation experience, and the typical values are 1.003, 1.005, 1.008, and 1.010.
[0092] The above-mentioned reactor core quadrant power tilt optimization method obtains the theoretical power level and measured power level of each component of the reactor under the historical cycle, as well as the target water gap distribution; realizes the core quadrant power tilt optimization of the reactor core loading plan according to the target water gap distribution, and obtains the target loading plan. According to the above content, it can be seen that in the process of determining the target loading plan, the present application determines the target water gap distribution by the deviation level of the theoretical power and the measured power of the historical cycle; then, according to the predicted quadrant power tilt state after the start of the previous cycle and the target water gap distribution, quantitatively predicts the quadrant power tilt state after the start of the next cycle; and optimizes the unit operation state by adjusting the core loading plan, realizes the early quantitative prediction and targeted suppression of the quadrant power tilt, alleviates the quadrant power tilt problem during the operation of the unit, and effectively suppresses the power tilt phenomenon of the reactor.
[0093] In one embodiment, if Figure 3 As shown in FIG, when it is necessary to predict the core quadrant power tilt of the core loading scheme of the reactor according to the target water gap distribution, the following contents may be included:
[0094] S301 , applying a target water gap distribution to a core loading scheme of a reactor, and obtaining a predicted power level corresponding to the core loading scheme after applying the target water gap distribution.
[0095] In one embodiment of the present application, after the target water gap distribution is applied to the core loading scheme of the reactor, a pre-trained power level analysis model can be used to predict and analyze the power level of the core loading scheme after the target water gap distribution is applied to obtain the predicted power level corresponding to the core loading scheme after the target water gap distribution is applied.
[0096] Among them, the training process of the power level analysis model includes: obtaining at least one sample loading scheme with sample water gap distribution, and marking the sample power level of each sample loading scheme through manual labeling or other forms; and training the initial analysis model through the sample loading scheme marked with the sample power level to obtain the trained power level analysis model.
[0097] In another embodiment of the present application, after the target water gap distribution is applied to the core loading scheme of the reactor, the core loading scheme can also be simulated to detect the power level corresponding to the core loading scheme during the simulation operation, and the detected power level is used as the predicted power level corresponding to the core loading scheme after the target water gap distribution is applied.
[0098] S302 , predicting the tilt amount of the core loading scheme according to the predicted power level, and obtaining the core quadrant power tilt amount of the core loading scheme of the reactor.
[0099] In one embodiment of the present application, a calculation formula for the core quadrant power tilt amount can be obtained in advance, and the predicted power level is substituted into the calculation formula to obtain a calculation result for the predicted power level. The obtained calculation result is the core quadrant power tilt amount of the core loading scheme of the reactor.
[0100] The calculation formula for the core quadrant power tilt may include multiple forms and may be adjusted according to different situations. The details of the calculation formula are not limited here.
[0101] The core quadrant power tilt optimization method of the above-mentioned reactor obtains the predicted power level corresponding to the core loading scheme after applying the target water gap distribution, and realizes the prediction of the tilt amount of the core loading scheme according to the predicted power level, providing a data basis for the subsequent determination of the target loading scheme and ensuring the smooth progress of the subsequent process.
[0102] In one embodiment, if Figure 4 As shown in the figure, when it is necessary to obtain the theoretical power level and measured power level of each component of the reactor under historical cycles, the following contents may be included:
[0103] S401, obtaining the burnup depth of the reactor fuel assembly in the historical cycle.
[0104] In one embodiment of the present application, the burnup depth of each fuel assembly in the cycle can be optimized based on the measured power level of the historical cycle to obtain a more accurate burnup depth of the fuel assembly of the reactor in the historical cycle.
[0105] S402, obtaining the theoretical power level and the measured power level of each component of the reactor under historical cycles after optimizing the reactor burnup according to the fuel depth.
[0106] It should be noted that when it is necessary to obtain the theoretical power level and measured power level of each component of the reactor under historical cycles, the following may be included: conducting flux diagram test measurements on each component of the reactor under historical cycles to obtain the measured power level of each component of the reactor under historical cycles; conducting theoretical simulations on the reactor under historical cycles to obtain the theoretical power level of each component of the reactor under historical cycles.
[0107] In one embodiment of the present application, based on the burnup depth of the reactor fuel assembly in the historical cycle obtained in the previous step, after the reactor burnup is optimized, the theoretical calculated power of each component at the time of flux diagram test measurement is counted, and the actual measured power of each component at the time of flux diagram test measurement is counted.
[0108] As an example, let's take a target reactor unit with 157 core components. This means that theoretical calculations yield 157 theoretically calculated powers, denoted as Pa(i), where i = 1, 2, ..., 157. Experimental measurements and post-processing yield 157 actual measured powers, denoted as Pt(i), where i = 1, 2, ..., 157.
[0109] The core quadrant power tilt optimization method for the above-mentioned reactor ensures the accuracy of the subsequent determination of the target loading plan by obtaining the theoretical power level and measured power level of each component of the reactor under historical cycles after optimizing the reactor consumption according to the fuel depth.
[0110] In one embodiment, if Figure 5 As shown, according to the theoretical power level and the measured power level, the target water gap distribution is determined, which may include the following:
[0111] S501 : Determine a power difference between a theoretical power level and a measured power level of a reactor corresponding to an initial water gap distribution.
[0112] In one embodiment of the present application, a difference operation is performed on the theoretical power level and the measured power level, and the obtained difference operation result is the power difference between the theoretical power level and the measured power level.
[0113] S502: Determine the target water gap distribution according to the power difference.
[0114] In one embodiment of the present application, when it is necessary to determine the target water gap distribution, the following contents may be included: verifying the size relationship between the power difference and the preset difference threshold; if the size relationship is that the power difference is less than the difference threshold, then the initial water gap distribution is used as the target water gap distribution.
[0115] Furthermore, if the size relationship is that the power difference is not less than the difference threshold, the initial water gap distribution is adjusted to obtain an adjusted initial water gap distribution; the adjusted initial water gap distribution is used as the new initial water gap distribution, and based on the new initial water gap distribution, the step of determining the power difference between the theoretical power level and the measured power level of the reactor under the corresponding initial water gap distribution is returned to execute until the target water gap distribution is determined.
[0116] The difference threshold is set to zero.
[0117] The above-mentioned reactor core quadrant power tilt optimization method determines the target water gap distribution, optimizes the core quadrant power tilt of the reactor core loading plan through the target water gap distribution, and realizes early quantitative prediction and targeted suppression of quadrant power tilt.
[0118] In one embodiment, if Figure 6 As shown, when it is necessary to obtain a target loading plan, the following contents may be included:
[0119] S601, obtaining the burnup depth of the reactor fuel assembly in the historical cycle.
[0120] S602, obtaining the theoretical power level and the measured power level of each component of the reactor under historical cycles after optimizing the reactor burnup according to the fuel depth.
[0121] S603: Determine a power difference between a theoretical power level and an actual power level.
[0122] S604 , verifying whether the power difference is zero during the process of adjusting the initial water gap distribution.
[0123] S605: If the power difference is zero during the initial water gap distribution adjustment process, the adjusted initial water gap distribution is used as the target water gap distribution.
[0124] S606 , predicting the core quadrant power tilt of the reactor when the target water gap distribution is applied in the core loading scheme of the target cycle of the reactor.
[0125] S607 , performing core quadrant power tilt optimization on the core loading plan of the reactor according to the core quadrant power tilt amount to obtain a target loading plan.
[0126] In one embodiment, after applying the target water gap distribution in the target loading scheme of the reactor target cycle, the core quadrant power tilt of the reactor is as follows: Figure 7 As shown in the figure, the actual power core quadrant power tilt of the target loading scheme in the actual operation of the nuclear power unit is as follows: Figure 8 As shown in Figure 2, it can be seen that the predicted results are consistent with the measured results in terms of overall trend.
[0127] In another embodiment, the measured power core quadrant power tilt amount of the historical cycle is as follows: Figure 9 As shown in the figure, the core quadrant power tilt of the target loading scheme determined according to the target water gap distribution in the target cycle is as follows: Figure 10 As shown in the figure, the target loading scheme determined by the target water gap distribution has the following power tilt in the core quadrant of the target cycle: Figure 11 As shown, it can be seen that Figure 11 and Figure 10 The trends are the same, indicating that the target loading plan is determined accurately.
[0128] The above-mentioned reactor core quadrant power tilt optimization method obtains the theoretical power level and measured power level of each component of the reactor under the historical cycle, as well as the target water gap distribution; realizes the core quadrant power tilt optimization of the reactor core loading plan according to the target water gap distribution to obtain the target loading plan. According to the above content, it can be seen that in the process of determining the target loading plan, the present application determines the target water gap distribution through the deviation level of the theoretical power and the measured power of the historical cycle and the quadrant power tilt state; and then quantitatively predicts the quadrant power tilt state after the next cycle is started. Finally, by optimizing the core loading plan layout, the advance quantitative prediction and targeted suppression of the quadrant power tilt are realized, thereby alleviating the quadrant power tilt problem during the operation of the unit and effectively suppressing the power tilt phenomenon of the reactor.
[0129] It should be understood that, although the steps in the flowcharts of the above embodiments are shown in sequence as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be performed in other orders. Moreover, at least a portion of the steps in the flowcharts of the above embodiments may include multiple steps or multiple stages, and 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 to be performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of steps or stages in other steps.
[0130] Based on the same inventive concept, embodiments of the present application also provide a reactor core quadrant power tilt optimization device for implementing the aforementioned reactor core quadrant power tilt optimization method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of the embodiments of the reactor core quadrant power tilt optimization device provided below can be found in the limitations of the reactor core quadrant power tilt optimization method described above and will not be repeated here.
[0131] In one embodiment, Figure 12 As shown, a reactor core quadrant power tilt optimization device is provided, comprising: an acquisition module 10, a determination module 20, a prediction model 30 and an adjustment module 40, wherein:
[0132] The acquisition module 10 is used to obtain the theoretical power level and the measured power level of each component of the reactor under historical cycles.
[0133] The determination module 20 is configured to determine a target water gap distribution according to the theoretical power level and the measured power level.
[0134] The prediction model 30 is used to predict the core quadrant power tilt of the core loading scheme of the reactor according to the target water gap distribution.
[0135] The adjustment module 40 is used to optimize the core quadrant power tilt of the core loading plan according to the core quadrant power tilt amount to obtain a target loading plan.
[0136] In one embodiment, if the core quadrant power tilt amount is less than the core quadrant power tilt amount threshold, the core loading plan is used as the target loading plan.
[0137] In one embodiment, if the core quadrant power tilt amount is not less than the core quadrant power tilt amount threshold, the core loading plan of the reactor is optimized in terms of core quadrant power tilt to obtain a target loading plan.
[0138] In one embodiment, obtaining the burnup depth of the fuel assembly in the historical cycle of the reactor;
[0139] Obtain the theoretical and measured power levels of each component of the reactor under historical cycles after optimizing the reactor burnup according to the fuel depth.
[0140] In one embodiment, a flux diagram test is performed on each component of the reactor under historical cycles to obtain the measured power level of each component of the reactor under historical cycles;
[0141] Theoretical simulation of the reactor under historical cycles is carried out to obtain the theoretical power level of each component of the reactor under historical cycles.
[0142] In one embodiment, determining a power difference between a theoretical power level and a measured power level of the reactor corresponding to an initial water gap distribution;
[0143] According to the power difference, the target water gap distribution is determined.
[0144] In one embodiment, verifying the magnitude relationship between the power difference and a preset difference threshold;
[0145] If the power difference is less than the difference threshold, the initial water gap distribution is used as the target water gap distribution.
[0146] In one embodiment, if the magnitude relationship is that the power difference is not less than the difference threshold, the initial water gap distribution is water gap adjusted to obtain an adjusted initial water gap distribution;
[0147] The adjusted initial water gap distribution is used as the new initial water gap distribution, and based on the new initial water gap distribution, the step of determining the power difference between the theoretical power level and the measured power level of the reactor under the corresponding initial water gap distribution is returned to execute until the target water gap distribution is determined.
[0148] In one embodiment, the difference threshold is zero.
[0149] The core quadrant power tilt optimization device of the above-mentioned reactor obtains the theoretical power level and the measured power level of each component of the reactor under the historical cycle, as well as the target water gap distribution; realizes the core quadrant power tilt optimization of the core loading plan of the reactor according to the target water gap distribution, and obtains the target loading plan. According to the above content, it can be seen that in the process of determining the target loading plan, the present application quantitatively predicts the quadrant power tilt state after the start of the next cycle through the deviation level of the theoretical power and the measured power of the historical cycle; then, according to the predicted quadrant power tilt state after the start of the previous cycle, the target water gap distribution is determined; and the model parameters of the target theoretical model of the reactor are adjusted by the target water gap distribution to realize the early quantitative prediction and targeted suppression of the quadrant power tilt, alleviate the quadrant power tilt problem during the operation of the unit, and effectively suppress the power tilt phenomenon of the reactor.
[0150] Each module in the aforementioned reactor core quadrant power tilt optimization device can be implemented in whole or in part through software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in hardware form, or can be stored in a computer device memory in software form, so that the processor can call and execute the corresponding operations of each module.
[0151] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 13As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected via a system bus, and the communication interface, the display unit and the input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system 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 input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for optimizing the core quadrant power tilt is implemented. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen 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 casing, or an external keyboard, touchpad or mouse.
[0152] Those skilled in the art will understand that Figure 13 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 shown in the figure, or combine certain components, or have a different component arrangement.
[0153] 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:
[0154] Obtain the theoretical power level and measured power level of each component of the reactor under historical cycles;
[0155] Determine the target water gap distribution based on the theoretical power level and the measured power level;
[0156] Predicting the core quadrant power tilt of the reactor core loading scheme based on the target water gap distribution;
[0157] The core loading scheme is optimized according to the core quadrant power tilt amount to obtain the target loading scheme.
[0158] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:
[0159] applying the target water gap distribution to a core loading scheme of the reactor, and obtaining a predicted power level corresponding to the core loading scheme after applying the target water gap distribution;
[0160] The tilt amount of the core loading scheme is predicted according to the predicted power level to obtain the core quadrant power tilt amount of the core loading scheme of the reactor.
[0161] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:
[0162] If the core quadrant power tilt amount is less than the core quadrant power tilt amount threshold, the core loading plan is used as the target loading plan;
[0163] If the core quadrant power tilt amount is not less than the core quadrant power tilt amount threshold, the core loading plan of the reactor is optimized based on the core quadrant power tilt to obtain a target loading plan.
[0164] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:
[0165] Obtain the burnup depth of the reactor's fuel assemblies in historical cycles;
[0166] Obtain the theoretical and measured power levels of each component of the reactor under historical cycles after optimizing the reactor burnup according to the fuel depth.
[0167] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:
[0168] Conduct flux diagram test measurements on each component of the reactor under historical cycles to obtain the measured power levels of each component under historical cycles;
[0169] Theoretical simulation of the reactor under historical cycles is carried out to obtain the theoretical power level of each component of the reactor under historical cycles.
[0170] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:
[0171] determining the power difference between the theoretical power level and the measured power level;
[0172] According to the power difference, the target water gap distribution is determined.
[0173] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:
[0174] Verify the magnitude relationship between the power difference and a preset difference threshold;
[0175] If the power difference is less than the difference threshold, the initial water gap distribution is used as the target water gap distribution.
[0176] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:
[0177] If the power difference is not less than the difference threshold, the initial water gap distribution is adjusted to obtain an adjusted initial water gap distribution;
[0178] The adjusted initial water gap distribution is used as the new initial water gap distribution, and based on the new initial water gap distribution, the step of determining the power difference between the theoretical power level and the measured power level of the reactor under the corresponding initial water gap distribution is returned to execute until the target water gap distribution is determined.
[0179] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:
[0180] The difference threshold is set to zero.
[0181] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:
[0182] Obtain the theoretical power level and measured power level of each component of the reactor under historical cycles;
[0183] Determine the target water gap distribution based on the theoretical power level and the measured power level;
[0184] Predicting the core quadrant power tilt of the reactor core loading scheme based on the target water gap distribution;
[0185] The core loading scheme is optimized according to the core quadrant power tilt amount to obtain the target loading scheme.
[0186] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:
[0187] applying the target water gap distribution to a core loading scheme of the reactor, and obtaining a predicted power level corresponding to the core loading scheme after applying the target water gap distribution;
[0188] The tilt amount of the core loading scheme is predicted according to the predicted power level to obtain the core quadrant power tilt amount of the core loading scheme of the reactor.
[0189] If the core quadrant power tilt amount is less than the core quadrant power tilt amount threshold, the core loading plan is used as the target loading plan;
[0190] If the core quadrant power tilt amount is not less than the core quadrant power tilt amount threshold, the core loading plan of the reactor is optimized based on the core quadrant power tilt to obtain a target loading plan.
[0191] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:
[0192] Obtain the burnup depth of the reactor's fuel assemblies in historical cycles;
[0193] Obtain the theoretical and measured power levels of each component of the reactor under historical cycles after optimizing the reactor burnup according to the fuel depth.
[0194] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:
[0195] Conduct flux diagram test measurements on each component of the reactor under historical cycles to obtain the measured power levels of each component under historical cycles;
[0196] Theoretical simulation of the reactor under historical cycles is carried out to obtain the theoretical power level of each component of the reactor under historical cycles.
[0197] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:
[0198] Determine the power difference between the theoretical power level and the measured power level of the reactor corresponding to the initial water gap distribution;
[0199] According to the power difference, the target water gap distribution is determined.
[0200] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:
[0201] Verify the magnitude relationship between the power difference and a preset difference threshold;
[0202] If the power difference is less than the difference threshold, the initial water gap distribution is used as the target water gap distribution.
[0203] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:
[0204] If the power difference is not less than the difference threshold, the initial water gap distribution is adjusted to obtain an adjusted initial water gap distribution;
[0205] The adjusted initial water gap distribution is used as the new initial water gap distribution, and based on the new initial water gap distribution, the step of determining the power difference between the theoretical power level and the measured power level of the reactor under the corresponding initial water gap distribution is returned to execute until the target water gap distribution is determined.
[0206] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:
[0207] The difference threshold is set to zero.
[0208] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:
[0209] Obtain the theoretical power level and measured power level of each component of the reactor under historical cycles;
[0210] Determine the target water gap distribution based on the theoretical power level and the measured power level;
[0211] Predicting the core quadrant power tilt of the reactor core loading scheme based on the target water gap distribution;
[0212] The core loading scheme is optimized according to the core quadrant power tilt amount to obtain the target loading scheme.
[0213] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:
[0214] applying the target water gap distribution to a core loading scheme of the reactor, and obtaining a predicted power level corresponding to the core loading scheme after applying the target water gap distribution;
[0215] The tilt amount of the core loading scheme is predicted according to the predicted power level to obtain the core quadrant power tilt amount of the core loading scheme of the reactor.
[0216] If the core quadrant power tilt amount is less than the core quadrant power tilt amount threshold, the core loading plan is used as the target loading plan;
[0217] If the core quadrant power tilt amount is not less than the core quadrant power tilt amount threshold, the core loading plan of the reactor is optimized based on the core quadrant power tilt to obtain a target loading plan.
[0218] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:
[0219] Obtain the burnup depth of the reactor's fuel assemblies in historical cycles;
[0220] Obtain the theoretical and measured power levels of each component of the reactor under historical cycles after optimizing the reactor burnup according to the fuel depth.
[0221] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:
[0222] Conduct flux diagram test measurements on each component of the reactor under historical cycles to obtain the measured power levels of each component under historical cycles;
[0223] Theoretical simulation of the reactor under historical cycles is carried out to obtain the theoretical power level of each component of the reactor under historical cycles.
[0224] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:
[0225] Determine the power difference between the theoretical power level and the measured power level of the reactor corresponding to the initial water gap distribution;
[0226] According to the power difference, the target water gap distribution is determined.
[0227] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:
[0228] Verify the magnitude relationship between the power difference and a preset difference threshold;
[0229] If the power difference is less than the difference threshold, the initial water gap distribution is used as the target water gap distribution.
[0230] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:
[0231] If the power difference is not less than the difference threshold, the initial water gap distribution is adjusted to obtain an adjusted initial water gap distribution;
[0232] The adjusted initial water gap distribution is used as the new initial water gap distribution, and based on the new initial water gap distribution, the step of determining the power difference between the theoretical power level and the measured power level of the reactor under the corresponding initial water gap distribution is returned to execute until the target water gap distribution is determined.
[0233] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: the difference threshold is set to zero.
[0234] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of relevant countries and regions.
[0235] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.
[0236] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0237] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.
Claims
1. A method for optimizing core quadrant power tilt of a reactor, characterized in that: The method comprises: Obtain the theoretical power level and measured power level of each component of the reactor under historical cycles; determining a target water gap distribution according to the theoretical power level and the measured power level; predicting a core quadrant power tilt of a core loading scheme of the reactor according to the target water gap distribution; The core loading scheme is optimized by core quadrant power tilt according to the core quadrant power tilt amount to obtain a target loading scheme.
2. The method according to claim 1, characterized in that The predicting, based on the target water gap distribution, the core quadrant power tilt of the core loading scheme of the reactor comprises: applying the target water gap distribution to a core loading scheme of the reactor, and obtaining a predicted power level corresponding to the core loading scheme after applying the target water gap distribution; The tilt amount of the core loading scheme is predicted according to the predicted power level to obtain the core quadrant power tilt amount of the core loading scheme of the reactor.
3. The method according to claim 1, characterized in that The step of performing core quadrant power tilt optimization on the core loading scheme according to the core quadrant power tilt amount to obtain a target loading scheme includes: If the core quadrant power tilt amount is less than the core quadrant power tilt amount threshold, taking the core loading plan as a target loading plan; If the core quadrant power tilt amount is not less than the core quadrant power tilt amount threshold, the core loading plan of the reactor is optimized in terms of core quadrant power tilt to obtain a target loading plan.
4. The method according to claim 1, wherein The obtaining of the theoretical power level and the measured power level of each component of the reactor under the historical cycle includes: Obtain the burnup depth of the reactor's fuel assemblies in historical cycles; The theoretical power level and the measured power level of each component of the reactor under historical cycles after optimizing the burnup of the reactor according to the fuel depth are obtained.
5. The method according to claim 4, characterized in that The obtaining of the theoretical power level and the measured power level of each component of the reactor under the historical cycle includes: Conduct flux diagram test measurements on each component of the reactor under historical cycles to obtain the measured power levels of each component under historical cycles; Theoretical simulation of the reactor under historical cycles is carried out to obtain the theoretical power level of each component of the reactor under historical cycles.
6. The method according to claim 1, characterized in that The determining of the target water gap distribution according to the theoretical power level and the measured power level includes: determining a power difference between the theoretical power level and the measured power level of the reactor corresponding to the initial water gap distribution; A target water gap distribution is determined according to the power difference.
7. The method according to claim 6, characterized in that Determining a target water gap distribution according to the power difference includes: Verifying a magnitude relationship between the power difference and a preset difference threshold; If the power difference is smaller than the difference threshold, the initial water gap distribution is used as the target water gap distribution.
8. The method according to claim 7, characterized in that The method further comprises: If the power difference is not less than the difference threshold, the initial water gap distribution is adjusted to obtain an adjusted initial water gap distribution; The adjusted initial water gap distribution is used as a new initial water gap distribution, and based on the new initial water gap distribution, the step of determining the power difference between the theoretical power level and the measured power level of the reactor under the corresponding initial water gap distribution is returned to, until the target water gap distribution is determined.
9. The method according to claim 7, characterized in that The difference threshold is set to zero.
10. A core quadrant power tilt optimization device, characterized in that: The device comprises: An acquisition module, used to obtain the theoretical power level and measured power level of each component of the reactor under historical cycles; a determination module, configured to determine a target water gap distribution according to the theoretical power level and the measured power level; a prediction model for predicting a core quadrant power tilt of a core loading scheme of the reactor based on the target water gap distribution; An adjustment module is used to optimize the core quadrant power tilt of the core loading plan according to the core quadrant power tilt amount to obtain a target loading plan.