Method and device for determining power correction factor of reactor

Abstract

The embodiment of the invention provides a method and a device for determining a power correction factor of a reactor, and belongs to the technical field of nuclear power. The method comprises the following steps: if the average temperature deviation of a primary loop of a reactor is detected to be less than a temperature threshold value, calculating a first correction factor according to the average temperature deviation; collecting the reactor power of the reactor, and determining the target right limit minimum margin according to the reactor power; according to the target right limit minimum margin and a first corresponding relation, a second correction factor is determined, and the first corresponding relation is used for representing the corresponding relation between the right limit minimum margin and the correction factor; and calculating according to the first correction factor and the second correction factor to obtain a power correction factor which is used for adjusting the rod position of a power control rod of the reactor so as to adjust the average temperature of the loop. According to the embodiment of the invention, the human factor risk problem existing in manual adjustment of the power correction factor in the prior art can be solved, and the success rate of the test is improved.

Description

Technical Field

[0001] This application relates to the field of nuclear power technology, and in particular to a method and apparatus for determining the power correction factor of a reactor. Background Technology

[0002] In pressurized water reactor (PRR) control systems, the linear load change test is a crucial test to verify that the system's main parameters remain within the normal operating range under linear load change conditions. This test assesses the reactor design effectiveness and control stability by linearly reducing the load from 100% FP (power) to 15% FP at a rate of 5% FP / min, maintaining this power plateau for a period, and then increasing the load back to 100% FP at the same rate. However, during the transient load changes, excessive accumulation of xenon toxicity can lead to a decrease in the reactor's primary coolant mean temperature. Furthermore, if the R-bar (coolant mean temperature control bar) is raised too quickly to the top of the reactor, its regulation capability may be insufficient, posing a risk of triggering the C22 signal (the primary coolant mean temperature is below the setpoint), causing the turbine to rapidly reduce its load, potentially leading to test failure. This test is one of the riskiest in RRC commissioning tests, and multiple failures have occurred, impacting the commercial operation of the nuclear power unit.

[0003] In existing technologies, although test procedures allow for the release of reactivity and mitigation of low primary loop average temperature by adjusting the power correction factor, nuclear power plant reactor power control employs a reactor-following control mode, using an open-loop control approach to ensure the reactor power quickly follows the secondary loop power. The reactor power control system obtains power control demand signals based on different secondary loop operating conditions, thereby determining the power setpoint, and then converting it into the G-bar (power control rod) group position setpoint. The power control demand signals obtained from the secondary loop operating conditions can be corrected using the power correction factor to obtain the power setpoint tracked by the primary loop. The power correction factor is an effective means of temporarily changing the G-bar group position. During testing, adjusting the power correction factor can adjust the R-bar position by controlling the G-bar position; that is, by increasing the power correction factor, the G-bar is inserted shallower, thus allowing the R-bar to be inserted deeper, delaying the R-bar from rising to the top of the reactor prematurely, enabling the R-bar to have temperature regulation capabilities, and preventing the primary loop average temperature from being too low. However, currently there is no automatic control method for adjusting the power correction factor, requiring the unit operator to manually adjust it based on the real-time unit status. When the unit operator is manually controlling the equipment, problems such as untimely intervention, excessive or insufficient adjustment are very likely to occur, resulting in a high failure rate of the test. Summary of the Invention

[0004] The main objective of this application is to propose a method and apparatus for determining the power correction factor of a reactor, aiming to solve the human-caused risk problem in manually adjusting the power correction factor in the prior art and improve the success rate of the experiment.

[0005] To achieve the above objectives, a first aspect of this application provides a method for determining the power correction factor of a reactor, the method comprising: If the average temperature deviation of the primary loop of the reactor is detected to be less than the temperature threshold, a first correction factor is calculated based on the average temperature deviation, which is obtained by subtracting the measured average temperature of the coolant in the primary loop from the reference average temperature of the coolant in the primary loop. The reactor power is collected, and the target right limit minimum margin is determined based on the reactor power. Based on the target right limit minimum margin and the first correspondence, a second correction factor is determined, whereby the first correspondence is used to characterize the correspondence between the right limit minimum margin and the correction factor. A power correction factor is calculated based on the first correction factor and the second correction factor. The power correction factor is used to adjust the position of the power control rods in the reactor, thereby affecting the position of the temperature control rods and thus adjusting the average temperature of the primary loop.

[0006] In some embodiments, the calculation of the power correction factor based on the first correction factor and the second correction factor includes: If the temperature control rod is detected to be in an upward state, then the current position of the temperature control rod is obtained; A third correction factor is obtained based on the current position of the temperature control rod and the second correspondence, whereby the second correspondence is used to characterize the correspondence between the position of the temperature control rod and the correction factor. The power correction factor is calculated based on the first correction factor, the second correction factor, and the third correction factor.

[0007] In some embodiments, the step of calculating a first correction factor based on the average temperature deviation if the average temperature deviation of the reactor's primary loop is detected to be less than a temperature threshold includes: If the average temperature deviation is detected to be less than the temperature threshold, the target temperature deviation is determined based on the average temperature deviation of the first loop. The first correction factor is determined based on the target temperature deviation.

[0008] In some embodiments, determining the target temperature deviation based on the average temperature deviation of the primary loop includes: If the average temperature deviation of the first loop is less than or equal to 0, then the target temperature deviation is set as the average temperature deviation of the first loop. If the average temperature deviation of the first loop is greater than 0, then the target temperature deviation is set to 0.

[0009] In some embodiments, obtaining the third correction factor based on the current position of the temperature control rod and the second correspondence includes: If the current position of the temperature control rod meets the first condition, then the third correction factor is set as the correction factor corresponding to the first condition. The second correspondence includes the first condition and the correction factor corresponding to the first condition. The first condition is that the current position of the temperature control rod is greater than or equal to the first position threshold and less than the second position threshold. If the current position of the temperature control rod meets the second condition, then the third correction factor is set as the correction factor corresponding to the second condition. The second correspondence includes the second condition and the correction factor corresponding to the second condition. The second condition is that the current position of the temperature control rod is greater than or equal to the second position threshold and less than the third position threshold. If the current position of the temperature control rod meets the third condition, then the third correction factor is set as the correction factor corresponding to the third condition. The second correspondence includes the third condition and the correction factor corresponding to the third condition. The third condition is that the current position of the temperature control rod is greater than or equal to the third position threshold and less than the fourth position threshold.

[0010] In some embodiments, acquiring the reactor's power and determining the target right-hand limit minimum margin based on the reactor power includes: The reactor's power output is collected; The axial power deviation is calculated based on the reactor's power output. The right limit of the axial power deviation is obtained by calculating based on the axial power deviation and the stack power. The right limit margin is obtained by calculating the difference between the right limit of the axial power deviation and the axial power deviation. The minimum value among the right limit margins obtained from multiple power measurements is taken as the target right limit minimum margin.

[0011] In some embodiments, determining the second correction factor based on the target right-limit minimum margin and the first correspondence includes: If the target right limit minimum margin satisfies the fourth condition, then the second correction factor is set as the correction factor corresponding to the fourth condition. The first correspondence includes the fourth condition and the correction factor corresponding to the fourth condition. The fourth condition is that the target right limit minimum margin is greater than or equal to the first right limit minimum margin threshold and less than the second right limit minimum margin threshold. If the target right limit minimum margin satisfies the fifth condition, then the second correction factor is set as the correction factor corresponding to the fifth condition. The first correspondence includes the fifth condition and the correction factor corresponding to the fifth condition. The fifth condition is that the target right limit minimum margin is greater than or equal to the second right limit minimum margin threshold and less than the third right limit minimum margin threshold.

[0012] In some embodiments, after calculating the power correction factor based on the first correction factor and the second correction factor, the method further includes: If the automatic control button is detected to be set to a preset state, the power correction factor is set to 0.

[0013] In some embodiments, calculating the power correction factor based on the first correction factor, the second correction factor, and the third correction factor includes: The power correction factor is obtained by subtracting the second correction factor from the sum of the first correction factor and the third correction factor.

[0014] To achieve the above objectives, a second aspect of this application provides a reactor power correction factor determination apparatus, the apparatus comprising: The detection module is used to calculate a first correction factor based on the average temperature deviation if the average temperature deviation of the primary loop of the reactor is less than a temperature threshold. The average temperature deviation is obtained by subtracting the measured average temperature of the coolant in the primary loop from the reference average temperature of the coolant in the primary loop. The acquisition module is used to acquire the reactor power and determine the target right limit minimum margin based on the reactor power. The first calculation module is used to determine the second correction factor based on the target right limit minimum margin and the first correspondence relationship, wherein the first correspondence relationship is used to characterize the correspondence relationship between the right limit minimum margin and the correction factor. The second calculation module is used to calculate a power correction factor based on the first correction factor and the second correction factor. The power correction factor is used to adjust the position of the power control rods in the reactor, thereby affecting the position of the temperature control rods and thus adjusting the average temperature of the primary loop.

[0015] The method and apparatus for determining the power correction factor of a reactor proposed in this application, after detecting that the average temperature deviation of the primary loop of the reactor is less than a temperature threshold, calculates a first correction factor based on the average temperature deviation. This first correction factor is used to adjust the position of the power control rods in the reactor. A target right-limit minimum margin is determined based on the reactor's power output. A second correction factor is determined based on the correspondence between the target right-limit minimum margin and the first correction factor. Finally, the power correction factor is calculated based on the first and second correction factors. This power correction factor is used to adjust the position of the power control rods in the reactor, thereby adjusting the average temperature of the primary loop. This application can improve the timeliness and accuracy of power correction factor adjustment and reduce the risk of experimental failure. Attached Figure Description

[0016] Figure 1 This is a flowchart illustrating the method for determining the power correction factor of a reactor provided in an embodiment of this application; Figure 2 This is a schematic diagram of the ladder diagram provided in the embodiments of this application; Figure 3 This is a schematic diagram of the automatic power correction factor control logic provided in the embodiments of this application; Figure 4 This is the C21 right limit minimum margin generation logic diagram provided in the embodiments of this application. Figure 5 This is a schematic diagram of the reactor power correction factor determination device provided in the embodiments of this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0018] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0020] During load linear variation tests in traditional pressurized water reactor control systems, excessive xenon toxicity accumulation leads to a decrease in the primary loop average temperature. The coolant average temperature control rods prematurely rise to the top of the reactor and lose their regulating capability, triggering a low-selection protection signal for the primary loop coolant average temperature and forcing the turbine to rapidly reduce load. Manually adjusting the power correction factor suffers from operational delays and insufficient accuracy, failing to match real-time dynamic changes in xenon toxicity with rod position status, significantly increasing the risk of temperature control failure and test interruption.

[0021] For example, during a load reduction process at a rate of 5% of full power per minute, the xenon poison accumulation rate exceeds the reactor's self-balancing capacity, causing a continuous widening of the deviation between the measured average temperature of the primary coolant and the reference average temperature. When the deviation exceeds a preset temperature threshold, the coolant average temperature control rod is raised to its mechanical limit at maximum speed. At this point, the right limit margin of the axial power deviation shrinks drastically to the critical range. Operators must simultaneously monitor the rod position status, reactor power fluctuations, and temperature deviation trends, manually calculate, and input the power correction factor correction value. Due to the time lag effect of xenon poison concentration changes, manual intervention cannot accurately compensate for the loss of temperature control rod adjustment capability, resulting in the primary coolant average temperature continuously deviating from the safe operating range, triggering the protection system interlock action.

[0022] If the above problems are not resolved, frequent rapid turbine load reductions will lead to a lower-than-expected test success rate, directly impacting the commissioning progress and commercial operation window of the nuclear power unit. Temperature control failures may cause distortion of the core's axial power distribution, accelerate mechanical wear of fuel assemblies, and increase the risk of radioactive material leakage. Accumulated errors from manual adjustments will widen the deviation between the power setpoint and actual demand, causing control system oscillations, which in severe cases may lead to an emergency reactor shutdown.

[0023] Based on this, this application provides a method and apparatus for determining the power correction factor of a reactor, aiming to solve the human-caused risks associated with manually adjusting the power correction factor in the prior art and improve the success rate of experiments. This application utilizes the deviation of the primary loop average temperature to adjust the power correction factor, and uses the actual R rod position and the C21 right limit minimum margin to correct the correction factor. This control method replaces the current manual adjustment of the power correction factor by the operator.

[0024] The reactor power correction factor determination method and apparatus provided in this application are specifically described through the following embodiments. First, the reactor power correction factor determination method in this application embodiment is described.

[0025] The reactor power correction factor determination method provided in this application relates to the field of nuclear power technology. This method can be applied to a terminal, a server, or software running on either a terminal or a server. In some embodiments, the terminal can be a smartphone, tablet, laptop, desktop computer, etc.; the server can be configured as an independent physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms; the software can be an application implementing the reactor power correction factor determination method, but is not limited to the above forms.

[0026] This application can be used in a wide variety of general-purpose or special-purpose computer system environments or configurations. Examples include: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, and distributed computing environments including any of the above systems or devices. This application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform specific tasks or implement specific abstract data types. This application can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0027] Figure 1 This is a flowchart of the reactor power correction factor determination method provided in the embodiments of this application. Figure 1 The method may include, but is not limited to, steps S100 to S400.

[0028] Step S100: If the average temperature deviation of the primary loop of the reactor is detected to be less than the temperature threshold, a first correction factor is calculated based on the average temperature deviation, which is obtained by subtracting the measured average temperature of the coolant in the primary loop from the reference average temperature of the coolant in the primary loop.

[0029] In this embodiment, when the operator performs a 100% FP load linear increase / decrease test, the logic for automatically adjusting the power correction factor takes effect. First, it checks whether the average temperature deviation ΔT of the reactor primary loop is less than a preset temperature threshold. If it is less than the threshold, a first correction factor f is calculated based on the temperature deviation. T(Initial power correction factor) is used to adjust the position of the power control rod. The primary loop average temperature deviation ΔT is obtained by subtracting the primary loop coolant reference average temperature Tavg from the primary loop coolant reference average temperature Tref. Specifically, it can be calculated by measuring the actual temperature with a temperature sensor and subtracting it from the preset reference temperature. This is used to determine whether power correction factor adjustment needs to be triggered.

[0030] Step S200: Collect the reactor power and determine the target right limit minimum margin based on the reactor power.

[0031] In this embodiment, the reactor power P is collected in real time. r And obtain the right limit minimum margin ΔC based on the pile power. min .like Figure 2 As shown, the ladder diagram (operation diagram) represents the allowable value of axial power deviation ΔI and the relative stack power P. r The relationship between the lines is one of the main bases for operators to control the reactor. The ladder diagram is bounded by lines oa, ab, bc, cd, de, ef, and fo. The right limit line inside the ladder diagram is the reference line △I. ref1 +5% is formed, and the operating point should be limited to its left. Because the power correction factor applied during the power rise phase of this test causes a change in the ΔI value, there is a risk of triggering the C21 signal (axial power deviation exceeding the operating range) right limit, i.e., exceeding the right limit of the ladder diagram, leading to a rapid load reduction of the primary circuit turbine and test failure. Therefore, the technical solution for automatically adjusting the power correction factor needs to consider the margin of the C21 right limit. The nuclear power plant reactor has four RPN power measurement channels, measuring the upper and lower power of the reactor core. The four axial power deviations ΔI and the corresponding C21 right limits are calculated. Specifically, the right limit of the ladder diagram is ΔI and P. r Given the x-coordinate ΔI, the y-coordinate P of the right limit can be obtained. r The value is the right limit of C21. Axial power deviation AO is the difference between the power at the top of the core and the power at the bottom of the core, divided by the total core power. Axial power deviation ΔI = AO * P r P r This represents the relative reactor power. The right-hand limit of C21 is obtained by subtracting ΔI from the right-hand limit of C21. The minimum value of the right-hand limit of C21, ΔC, is obtained by minimizing the right-hand limit of C21 corresponding to the four RPN power measurement channels. min That is, the minimum margin of the right limit of the target.

[0032] Step S300: Determine a second correction factor based on the target right limit minimum margin and the first correspondence relationship, wherein the first correspondence relationship is used to characterize the correspondence relationship between the right limit minimum margin and the correction factor.

[0033] In this embodiment, to avoid triggering the C21 right limit during power rise, the initial power correction factor should be reduced, and a minimum margin correction channel for the C21 right limit should be set. For example... Figure 3 As shown, the right-hand limit minimum margin ΔC of C21 min After entering the GF3 function (i.e., the first correspondence), the C21 right-hand limit minimum margin correction factor f is generated. ΔC Based on the target right-hand limit minimum margin ΔC min The second correction factor f is determined by the preset first correspondence. ΔC The first correspondence (GF3 function) defines the right-hand limit minimum margin and the right-hand limit minimum margin correction factor f. ΔC The functional relationship between them. The GF3 function can be calculated based on empirical data or models, and is not limited here. The GF3 function is a user-defined function used to characterize the correspondence between the right-hand limit minimum margin and the right-hand limit minimum margin correction factor. Based on the target right-hand limit minimum margin and the first correspondence, the second correction factor can be calculated.

[0034] Specifically, when the right-hand limit margin of C21 is small, i.e., ΔC min Greater than 0 and less than or equal to the preset ΔC1 min At that time, f ΔC Take the preset value f3; when ΔC min Greater than or equal to ΔC1 min And less than the preset ΔC2 min At that time, f ΔC According to ΔC min The linear decrease is 0.

[0035] Step S400: Calculate the power correction factor based on the first correction factor and the second correction factor. The power correction factor is used to adjust the position of the power control rods in the reactor, thereby affecting the position of the temperature control rods and adjusting the average temperature of the primary loop.

[0036] In this embodiment, the initial power correction factor f is used. T (First correction factor), right-hand limit minimum margin correction factor f ΔC (Second Correction Factor) The total power correction factor F is calculated when performing a linear load change test. F is used to adjust the average temperature of the primary loop to avoid test failure.

[0037] This embodiment, through the dynamic calculation and combined effect of multiple correction factors, enables the system to respond in real time to the effects of xenon poisoning accumulation and rod position changes on temperature, effectively avoiding the lag of manual intervention. This automated power correction mechanism significantly improves the success rate of load linear change tests, reduces the risk of triggering the protection system, and ensures the stability of various parameters of the unit during load changes. Simultaneously, by reducing human error, it improves the accuracy and reliability of reactor control, which is beneficial to the safe operation of the nuclear power unit.

[0038] In some embodiments, step S400 may include, but is not limited to, steps S410 to S430: Step S410: If the temperature control rod is detected to be in an upward state, then the current position of the temperature control rod is obtained. Step S420: Obtain a third correction factor based on the current position of the temperature control rod and the second correspondence, wherein the second correspondence is used to characterize the correspondence between the position of the temperature control rod and the correction factor. Step S430: Calculate the power correction factor based on the first correction factor, the second correction factor, and the third correction factor.

[0039] In this embodiment, the main purpose of adjusting the power correction factor is to adjust the position of the R rod (coolant average temperature control rod) by controlling the position of the G rod (power control rod), delaying the premature raising of the R rod to the top of the reactor, enabling the R rod to have temperature regulation capabilities, and preventing the primary loop average temperature from being too low. Therefore, an R rod position channel is also provided, and an R rod correction factor f is set when the R rod is raised. R The third correction factor is activated. This factor increases the G-bar (power control bar) to raise it, causing the R-bar (temperature control bar) to lower, thus delaying the R-bar from prematurely reaching the top of the reactor and enabling it to regulate temperature. When the temperature control bar is detected as being raised, its position is acquired, and the third correction factor is derived based on the position and a preset second correspondence. This third correction factor is used to adjust the position of the coolant average temperature control bar.

[0040] Specifically, the system detects the position status of the temperature control rod. When the temperature control rod is in the raised position, the system measures the rod position based on the actual position of the R rod, i.e., the lifting step. The rod speed Rspeed (this signal is generated by the reactor core control system) is input into the high threshold comparator. When Rspeed < 0, i.e., when the R rod is lowered, the correction factor f is adjusted. R When Rspeed > 0, the measured R rod position is corrected by the GF2 function (second correspondence) to obtain the correction factor f of the R rod position. R The second correspondence (GF2 function) defines the position of the temperature control rod and the correction factor f.R The functional relationship between them. The GF2 function can be calculated based on empirical data or models, and is not limited here. The GF2 function is a user-defined function used to characterize the correspondence between the position of the temperature control rod and the correction factor. Based on the position of the temperature control rod and the second correspondence, the third correction factor can be calculated.

[0041] Finally, based on the first correction factor f T Second correction factor f ΔC and the third correction factor f R The total power correction factor F is calculated and used to adjust the average temperature of the primary loop.

[0042] This embodiment achieves precise adjustment of the coolant average temperature control rod position by automatically adjusting the third correction factor through the position of the temperature control rod. By real-time detection of the primary loop average temperature deviation, temperature control rod status, and stack power safety margin, it automatically calculates and integrates the three independent correction factors to generate a power correction factor, replacing manual adjustment. This improves the adjustment response speed and accuracy, and avoids test failure due to intervention delays or improper adjustment.

[0043] In some embodiments, step S100 may include, but is not limited to, steps S110 to S120: Step S110: If the average temperature deviation is detected to be less than the temperature threshold, then the target temperature deviation is determined based on the average temperature deviation of the first loop. Step S120: Determine the first correction factor based on the target temperature deviation.

[0044] Specifically, step S110 may include, but is not limited to, steps S111 to S112: Step S111: If the average temperature deviation of the first loop is less than or equal to 0, then the target temperature deviation is set as the average temperature deviation of the first loop. Step S112: If the average temperature deviation of the first loop is greater than 0, then the target temperature deviation is set to 0.

[0045] In this embodiment, when the average temperature deviation of the primary loop of the reactor is detected to be less than a preset temperature threshold, the target temperature deviation ΔT' is calculated based on the average temperature deviation ΔT of the primary loop and the third correspondence. Specifically, the average temperature deviation signal ΔT of the primary loop is processed by the GF1 function (i.e., the third correspondence) to output the temperature deviation ΔT'. The correction factor needs to be adjusted only when the primary loop is overcooled. Therefore, the GF1 function is set to ΔT'=ΔT when ΔT≤0 and ΔT'=0 when ΔT>ΔT'.

[0046] In this embodiment, the input average temperature deviation ΔT' can be converted into an initial power correction factor f using a PI controller. T (First correction factor), which is actually related to the proportional coefficient G and integral time constant T of the PI controller. R Regarding this, the transfer function of the PI controller can be expressed as: GΔT'(1+1 / T) R S). Based on the thermal-hydraulic system program, an automatic power correction factor control system was established and simulation parameter optimization was carried out. It can be obtained that G can be -24MW / ℃, T R It can be 400s.

[0047] This embodiment ensures that the correction factor is adjusted only when primary loop overcooling is detected through the third correspondence, avoiding unnecessary adjustments under normal operating conditions and improving the efficiency and accuracy of the control system. The PI controller, through the proportional coefficient G and integral time constant TR, can smooth the input ΔT', avoiding drastic changes in the correction factor caused by instantaneous fluctuations in temperature deviation, thus improving system stability. Combining the third correspondence and the PI controller, automatic adjustment of the power correction factor can be achieved, avoiding problems such as untimely, excessive, or insufficient adjustment that may be caused by manual adjustment by the operator, thereby improving the success rate of the test and the safety of nuclear power plant operation.

[0048] In some embodiments, step S420 may include, but is not limited to, steps S421 to S423: Step S421: If the current position of the temperature control rod meets the first condition, then the third correction factor is set as the correction factor corresponding to the first condition. The second correspondence includes the first condition and the correction factor corresponding to the first condition. The first condition is that the current position of the temperature control rod is greater than or equal to the first position threshold and less than the second position threshold. Step S422: If the current position of the temperature control rod satisfies the second condition, then the third correction factor is set as the correction factor corresponding to the second condition. The second correspondence includes the second condition and the correction factor corresponding to the second condition. The second condition is that the current position of the temperature control rod is greater than or equal to the second position threshold and less than the third position threshold. Step S423: If the current position of the temperature control rod satisfies the third condition, then the third correction factor is set as the correction factor corresponding to the third condition. The second correspondence includes the third condition and the correction factor corresponding to the third condition. The third condition is that the current position of the temperature control rod is greater than or equal to the third position threshold and less than the fourth position threshold.

[0049] In this embodiment, when the R-bar is being raised (Rspeed>0), it indicates that the system deems it necessary to increase responsiveness. At this point, the power correction factor needs to be further adjusted based on the actual position of the R-bar. Figure 3 As shown, a correction value f can be calculated using the GF2 function (i.e., the second correspondence) based on the position of the R bar. R (i.e., the third correction factor).

[0050] Specifically, the current precise position of the temperature control rod can be monitored and obtained in real time through the rod position measurement device in the reactor control system. The second correspondence includes a first condition and its corresponding correction factor, a second condition and its corresponding correction factor, and a third condition and its corresponding correction factor. The first condition is that the current position of the temperature control rod is greater than or equal to a first rod position threshold and less than a second rod position threshold. When this condition is met, a predetermined correction factor value is searched and determined from the second correspondence as the third correction factor. The second condition is that the current position of the temperature control rod is greater than or equal to a second rod position threshold and less than a third rod position threshold. When this condition is met, a predetermined correction factor value is searched and determined from the second correspondence as the third correction factor. The third condition is that the current position of the temperature control rod is greater than or equal to a third rod position threshold and less than a fourth rod position threshold. When this condition is met, a predetermined correction factor value is searched and determined from the second correspondence as the third correction factor.

[0051] In this embodiment, the first, second, third, and fourth rod position thresholds are pre-set values ​​that divide the possible operating range of the control rod into at least three different intervals. The specific values ​​of these thresholds and the corresponding correction factors for each interval need to be determined based on the specific reactor design, control rod performance, operational experience, and the desired control objectives. For example, based on extensive experimental data and experience, and by establishing an automatic power correction factor control system based on a thermal-hydraulic system program and conducting simulation parameter optimization, the first rod position threshold can be set to 0 (step 1), the second rod position threshold R1 can be set to 170 (step 1), the third rod position threshold R2 can be set to 190 (step 1), and the fourth rod position threshold R3 can be set to 225 (step 1).

[0052] In this embodiment, after the system obtains the current rod position data, if the current rod position meets the first condition (i.e., it is between 0 and R1), then the third correction factor f is determined. R The value is the preset value of 0; if the current rod position meets the second condition (i.e., between R1 and R2), then the third correction factor f is determined. R The value is the preset value f2; if the current rod position meets the third condition (i.e., between R2 and R3), then the third correction factor f is determined. RThe value of f1 varies between a preset value f1 and 0 depending on the change in rod position R. Based on extensive experimental data and experience, and by establishing an automatic power correction factor control system based on a thermal-hydraulic system program and conducting simulation parameter optimization, it can be determined that the value of f1 can be 20MW and the value of f2 can be 10MW.

[0053] This embodiment achieves precise adjustment of the coolant average temperature control rod position by automatically adjusting the third correction factor based on the rod position. This method avoids the problems of untimely or over-adjustment that may result from manual intervention, improving the stability and reliability of reactor control. Furthermore, by setting multiple thresholds and corresponding preset values, differentiated processing for different rod position ranges is achieved, making the adjustment more flexible and precise.

[0054] In some embodiments, step S200 may include, but is not limited to, steps S210 to S250: Step S210: Collect the reactor power. Step S220: Calculate the axial power deviation based on the reactor's power output. Step S230: Calculate the right limit of the axial power deviation based on the axial power deviation and the stack power; Step S240: Calculate the difference between the right limit of the axial power deviation and the axial power deviation to obtain the right limit margin; Step S250: Obtain the minimum value among the right limit margins obtained from multiple power measurements as the target right limit minimum margin.

[0055] In this embodiment, the ladder diagram, bounded by lines oa, ab, bc, cd, de, ef, and fo, represents the allowable range of axial (vertical) power distribution in the reactor core. The horizontal axis is typically the axial power deviation ΔI, and the vertical axis is the relative reactor power P. r (Percentage of reactor power at full capacity). Axial power deviation ΔI is an indicator of the uniformity of reactor core power distribution. It reflects the proportion of the difference between the power at the top and bottom of the core to the total reactor power. The sign and magnitude of ΔI indicate the direction and degree of tilt in the power distribution. The area enclosed by lines oa, ab, bc, cd, de, ef, and fo defines the allowable range of ΔI at different power levels. The operating point (the current actual power distribution state) must always fall within this area; otherwise, the protection system may be triggered.

[0056] In this embodiment, the right limit line is a boundary line in the ladder diagram, typically located on the right side. It defines the upper limit of the allowed value of ΔI. The ΔI value of the running point (actual state) cannot exceed this line. The specific location of this right limit line is determined by a reference value ΔI.ref1 It is determined by adding an offset (5%). The actual power distribution of the reactor core (represented by ΔI) should not be too biased towards the upper part of the core (if ΔI is positive, it means the upper part has high power). If the operating point crosses the right limit, it means that the power in the upper part of the core is too high, or the power in the lower part is too low, exceeding the allowable range. The C21 right limit margin refers to the difference between the current actual axial power deviation ΔI and the ΔI value allowed by the right limit. In calculation or control, it is not desirable for the operating point to run exactly along the boundary line, but rather for it to be at a certain distance from the boundary line. This distance is the margin. The purpose of setting the margin is to cope with uncertainties such as calculation errors, measurement noise, and control delays, and to ensure that even with these disturbances, the operating point will not actually cross the boundary and trigger the C21 signal. If ΔI is much smaller than the ΔI value corresponding to the right limit, it means the margin is large; if ΔI is close to the right limit, the margin is small.

[0057] In this embodiment, the reactor typically has multiple independent power measurement channels (RPNs) distributed at different locations in the core to monitor the power in different regions of the core. Each channel measures the power in the upper and lower parts of the core, calculating its respective axial power deviation ΔI. The calculation formula is: ΔI = AO * P r Where AO is the difference between the upper and lower power divided by the stack power, P r This represents the current stack power level. For each channel's calculated ΔI value, based on the preset ladder diagram (right limit), the power P corresponding to the right limit at the current ΔI value can be found. r Value. This P r The value is the C21 right limit for that channel. Subtracting the corresponding C21 right limit from the ΔI value for each channel yields the C21 right limit margin for that channel. Since there are multiple channels, each channel has its own margin value. To ensure the entire core remains within safe limits, the minimum of these four margin values ​​must be taken as the C21 right limit margin for the entire reactor. ΔC min The margin representing the most "dangerous" measurement point in the reactor core is a key indicator that the entire control system needs to monitor and protect. For example... Figure 4 As shown, taking four independent power measurement channels (RPN) as an example, the logic diagram for generating the minimum value of the right limit margin of C21 is obtained.

[0058] This embodiment improves the adjustment accuracy of the third correction factor by dynamically tracking changes in reactor power and accurately obtaining the right-hand limit minimum margin, thus preventing the coolant average temperature control rod from reaching the top of the reactor prematurely and losing its adjustment capability. Redundant measurements through multiple independent channels enhance data reliability and security. Furthermore, using the minimum value as the final result reflects a conservative principle and is beneficial for the safe operation of the reactor.

[0059] In some embodiments, step S300 may include, but is not limited to, steps S310 to S320: Step S310: If the target right limit minimum margin satisfies the fourth condition, then the second correction factor is set as the correction factor corresponding to the fourth condition. The first correspondence includes the fourth condition and the correction factor corresponding to the fourth condition. The fourth condition is that the target right limit minimum margin is greater than or equal to the first right limit minimum margin threshold and less than the second right limit minimum margin threshold. Step S320: If the target right limit minimum margin satisfies the fifth condition, then the second correction factor is set as the correction factor corresponding to the fifth condition. The first correspondence includes the fifth condition and the correction factor corresponding to the fifth condition. The fifth condition is that the target right limit minimum margin is greater than or equal to the second right limit minimum margin threshold and less than the third right limit minimum margin threshold.

[0060] In this embodiment, the first correspondence includes a fourth condition and its corresponding correction factor value, and a fifth condition and its corresponding correction factor value. The fourth condition is that the target right-limit minimum margin is greater than or equal to the first right-limit minimum margin threshold and less than the second right-limit minimum margin threshold. When this condition is met, a predetermined correction factor value is searched and determined from the first correspondence as the second correction factor. The fifth condition is that the target right-limit minimum margin is greater than or equal to the second right-limit minimum margin threshold and less than the third right-limit minimum margin threshold. When this condition is met, a predetermined correction factor value is searched and determined from the first correspondence as the second correction factor.

[0061] In this embodiment, the first, second, and third right-limit minimum margin thresholds are pre-set values. The specific values ​​of these thresholds need to be determined based on the reactor's design parameters, safety regulations, and operational experience. They divide the possible range of the target right-limit minimum margin into different intervals. For example, based on extensive experimental data and experience, and by establishing an automatic power correction factor control system based on a thermal-hydraulic system program and conducting simulation parameter optimization, the first right-limit minimum margin threshold can be set to 0, and the second right-limit minimum margin threshold ΔC1... min It can be set to 2%, the third right-hand limit minimum margin threshold ΔC2 min It can be set to 4.5%.

[0062] In this embodiment, after the system obtains the target right limit minimum margin, if the target right limit minimum margin satisfies the fourth condition (i.e., within 0 to ΔC1)... min (between), then determine the second correction factor f ΔCThe value is the preset value f3; if the current rod position satisfies the fourth condition (i.e., in ΔC1) min To ΔC2 min (between), then determine the second correction factor f ΔC The value of f3 decreases linearly from f3 to 0 according to the change of the right-hand limit minimum margin. Based on extensive experimental data and experience, and by establishing an automatic power correction factor control system based on a thermal-hydraulic system program and conducting simulation parameter optimization, it can be concluded that the value of f3 can be 50.

[0063] This embodiment introduces a second correction factor based on the minimum margin of the target right limit, and applies different correction values ​​according to different ranges of the margin. This allows the reactor's safety margin state to be more directly integrated into the power control logic. When the safety margin is large, the control can be appropriately relaxed to pursue a better power response. When the safety margin decreases, the control intensity is automatically increased to ensure that the reactor always operates within the safety boundary. This dynamic adjustment mechanism improves the flexibility and safety of power control and helps to optimize the overall operating performance of the reactor.

[0064] In some embodiments, step S400 may be followed by, but is not limited to, step S500: In step S500, if it is detected that the automatic control button is set to a preset state, the power correction factor is set to 0.

[0065] In this embodiment, since the automatic control logic remains active throughout the entire load linearity increase / decrease test, for safety reasons, an automatic control button is provided for the operator to manually stop or reset the test. The preset state is when the operator manually sets the automatic control button to the off state. When the automatic control button is detected to be in the preset state, the system sets the power correction factor to 0, that is, temporarily stops or cancels all power adjustments based on the power correction factor. This prevents the original correction logic from continuing to generate undesirable control actions that may contradict human intent when the automatic control is manually stopped or reset.

[0066] This embodiment includes a manual control button, which allows the operator to intervene in the load linear change test according to the actual situation. This prevents potential safety risks in the event of automatic control logic failure and allows the operator to manually intervene in the test process when necessary to ensure the safety of the test.

[0067] In some embodiments, step S430 may include, but is not limited to, step S431: Step S431: Subtract the second correction factor from the sum of the first correction factor and the third correction factor to obtain the power correction factor.

[0068] In this embodiment, during the load linearity test, the total power of the reactor control system is corrected using a first correction factor, a second correction factor, and a third correction factor. The total correction factor F is the sum of the base correction and the R-bar correction, minus the margin correction. That is, F = f T +f R -f ΔC .

[0069] Specifically, the first correction factor f T The first correction factor is the base power correction factor calculated based on the average temperature deviation of the primary loop, and its purpose is to prevent or mitigate excessively low (overcooled) average temperature in the primary loop. The second correction factor f ΔC Based on the C21 right-hand limit minimum margin (ΔC) min The calculated corrected power correction factor aims to reduce the total power correction factor F when the axial power deviation margin is small, in order to avoid applying an excessively large f. T The C21 signal was triggered, causing the experiment to fail. The third correction factor f R The corrected power correction factor is calculated based on the state of the R-bar (coolant average temperature control bar), particularly its bar speed Rspeed and bar position. Its purpose is to further correct f when the R-bar is raised. T To account for the reduced adjustment capability of the R-bar and avoid triggering the C21 signal (axial power deviation exceeding the right limit of the operating range), the first correction factor is added to the third correction factor to adjust the basic correction (f). T ) and corrections related to the R-bar state (f R The sum of these values ​​yields a comprehensive correction value that takes into account temperature deviation and R-bar motion. Subtracting the second correction factor involves subtracting the correction based on the axial power deviation margin (f) from this comprehensive correction value. ΔC The reason for subtracting is that when the margin is small, the total correction effect needs to be reduced to prevent overshooting. Therefore, f ΔC It is usually a positive value (when a reduction in correction is needed), and by subtracting it, the value of F can be reduced.

[0070] This embodiment organically combines multiple control factors targeting temperature, R-bar condition, and power distribution limitations to form a more refined, coordinated, and safe automatic control strategy. This combination ensures that during the test, it can effectively prevent the primary loop temperature from being too low and avoid axial power deviation from exceeding the allowable range, thereby improving the success rate of the test.

[0071] This embodiment monitors the average temperature deviation of the primary loop, processes it using the GF1 function (outputting ΔT' only when ΔT≤0, otherwise outputting 0), and then calculates the first correction factor using a PI controller. Simultaneously, it monitors the R-rod speed and position; when the R-rod is raised, a third correction factor is calculated using the GF2 function to compensate for the reduced adjustment capability of the R-rod. To prevent the axial power deviation ΔI from exceeding the allowable range (triggering the C21 signal), the right limit margin of C21 is calculated based on the stack power, and the minimum value from multiple measurement channels is taken, generating a second correction factor using the GF3 function. Finally, the first, second, and third correction factors are combined to obtain the total power correction factor. That is, the power correction factor is adjusted using the deviation of the primary loop average temperature, and corrected using the actual R-rod position and the minimum right limit margin of C21. This embodiment automatically calculates and integrates three independent correction factors to generate a power correction factor by real-time detection of the primary loop average temperature deviation, power control rod status, and stack power safety margin, replacing manual adjustment, thereby improving the adjustment response speed and accuracy, and avoiding test failures due to intervention delays or improper adjustment.

[0072] Please see Figure 5 This application also provides a reactor power correction factor determination device 600, which can implement the above-described reactor power correction factor determination method. The device includes: The detection module 10 is used to calculate a first correction factor based on the average temperature deviation if the average temperature deviation of the primary loop of the reactor is less than the temperature threshold. The average temperature deviation is obtained by subtracting the measured average temperature of the coolant in the primary loop from the reference average temperature of the coolant in the primary loop. The acquisition module 20 is used to acquire the reactor power and determine the target right limit minimum margin based on the reactor power. The first calculation module 30 is used to determine a second correction factor based on the target right limit minimum margin and the first correspondence relationship, wherein the first correspondence relationship is used to characterize the correspondence relationship between the right limit minimum margin and the correction factor. The second calculation module 40 is used to calculate a power correction factor based on the first correction factor and the second correction factor. The power correction factor is used to adjust the position of the power control rods in the reactor, thereby affecting the position of the temperature control rods and thus adjusting the average temperature of the primary loop.

[0073] In some implementations, the second computing module 40 may include: The first acquisition submodule is used to acquire the current position of the temperature control rod if it is detected that the temperature control rod is in an upward state. The first calculation submodule is used to obtain a third correction factor based on the current position of the temperature control rod and the second correspondence, wherein the second correspondence is used to characterize the correspondence between the position of the temperature control rod and the correction factor. The second calculation submodule is used to calculate the power correction factor based on the first correction factor, the second correction factor and the third correction factor.

[0074] In some implementations, the detection module 10 may include: The third calculation submodule is used to determine the target temperature deviation based on the average temperature deviation of the first loop if the average temperature deviation is detected to be less than the temperature threshold. The fourth calculation submodule is used to determine the first correction factor based on the target temperature deviation.

[0075] In some implementations, the third computing submodule may include: The first setting unit is configured to set the target temperature deviation as the average temperature deviation of the first loop if the average temperature deviation of the first loop is less than or equal to 0. The second setting unit is used to set the target temperature deviation to 0 if the average temperature deviation of the first loop is greater than 0.

[0076] In some implementations, the first computing submodule may include: The third setting unit is used to set the third correction factor to the correction factor corresponding to the first condition if the current position of the temperature control rod meets the first condition. The second correspondence includes the first condition and the correction factor corresponding to the first condition. The first condition is that the current position of the temperature control rod is greater than or equal to the first position threshold and less than the second position threshold. The fourth setting unit is used to set the third correction factor to the correction factor corresponding to the second condition if the current position of the temperature control rod meets the second condition. The second correspondence includes the second condition and the correction factor corresponding to the second condition. The second condition is that the current position of the temperature control rod is greater than or equal to the second position threshold and less than the third position threshold. The fifth setting unit is used to set the third correction factor as the correction factor corresponding to the third condition if the current position of the temperature control rod meets the third condition. The second correspondence includes the third condition and the correction factor corresponding to the third condition. The third condition is that the current position of the temperature control rod is greater than or equal to the third position threshold and less than the fourth position threshold.

[0077] In some implementations, the acquisition module 20 may include: The acquisition submodule is used to acquire the reactor's power. The fifth calculation submodule is used to calculate the axial power deviation based on the reactor's power. The sixth calculation submodule is used to calculate the right limit of the axial power deviation based on the axial power deviation and the stack power. The seventh calculation submodule is used to calculate the difference between the right limit of the axial power deviation and the axial power deviation to obtain the right limit margin. The second acquisition submodule is used to acquire the minimum value among the right limit margins obtained from multiple power measurements as the target right limit minimum margin.

[0078] In some implementations, the first computing module 30 may include: The first setting submodule is used to set the second correction factor as the correction factor corresponding to the fourth condition if the target right limit minimum margin satisfies the fourth condition. The first correspondence includes the fourth condition and the correction factor corresponding to the fourth condition. The fourth condition is that the target right limit minimum margin is greater than or equal to the first right limit minimum margin threshold and less than the second right limit minimum margin threshold. The second setting submodule is used to set the second correction factor as the correction factor corresponding to the fifth condition if the target right limit minimum margin satisfies the fifth condition. The first correspondence includes the fifth condition and the correction factor corresponding to the fifth condition. The fifth condition is that the target right limit minimum margin is greater than or equal to the second right limit minimum margin threshold and less than the third right limit minimum margin threshold.

[0079] In some embodiments, the apparatus may further include: The setting module is used to set the power correction factor to 0 if it is detected that the automatic control button is set to a preset state.

[0080] In some implementations, the second computing submodule may include: The calculation unit is used to subtract the second correction factor from the sum of the first correction factor and the third correction factor to obtain the power correction factor.

[0081] The specific implementation of the power correction factor determination device for this reactor is basically the same as the specific implementation of the power correction factor determination method for the reactor described above, and will not be repeated here.

[0082] The reactor power correction factor determination method and apparatus provided in this application, after detecting that the average temperature deviation of the primary loop of the reactor is less than a temperature threshold, calculate a first correction factor based on the average temperature deviation. The first correction factor is used to adjust the position of the reactor's power control rods. A target right-limit minimum margin is determined based on the reactor's power output. A second correction factor is determined based on the target right-limit minimum margin and a first correspondence. Finally, the power correction factor is calculated based on the first and second correction factors and used to adjust the average temperature of the primary loop. This application can improve the timeliness and accuracy of power correction factor adjustment and reduce the risk of test failure.

[0083] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0084] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0085] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0086] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0087] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0088] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0089] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0090] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0091] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0092] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0093] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A method for determining the power correction factor of a reactor, characterized in that, The method includes: If the average temperature deviation of the primary loop of the reactor is detected to be less than the temperature threshold, a first correction factor is calculated based on the average temperature deviation, which is obtained by subtracting the measured average temperature of the coolant in the primary loop from the reference average temperature of the coolant in the primary loop. The reactor power is collected, and the target right limit minimum margin is determined based on the reactor power. Based on the target right limit minimum margin and the first correspondence, a second correction factor is determined, whereby the first correspondence is used to characterize the correspondence between the right limit minimum margin and the correction factor. A power correction factor is calculated based on the first correction factor and the second correction factor. The power correction factor is used to adjust the position of the power control rods in the reactor, thereby affecting the position of the temperature control rods and thus adjusting the average temperature of the primary loop.

2. The method according to claim 1, characterized in that, The calculation of the power correction factor based on the first correction factor and the second correction factor includes: If the temperature control rod is detected to be in an upward state, then the current position of the temperature control rod is obtained; A third correction factor is obtained based on the current position of the temperature control rod and the second correspondence, whereby the second correspondence is used to characterize the correspondence between the position of the temperature control rod and the correction factor. The power correction factor is calculated based on the first correction factor, the second correction factor, and the third correction factor.

3. The method according to claim 1, characterized in that, If the average temperature deviation of the reactor's primary loop is detected to be less than a temperature threshold, a first correction factor is calculated based on the average temperature deviation, including: If the average temperature deviation is detected to be less than the temperature threshold, the target temperature deviation is determined based on the average temperature deviation of the first loop. The first correction factor is determined based on the target temperature deviation.

4. The method according to claim 3, characterized in that, The step of determining the target temperature deviation based on the average temperature deviation of the first loop includes: If the average temperature deviation of the first loop is less than or equal to 0, then the target temperature deviation is set as the average temperature deviation of the first loop. If the average temperature deviation of the first loop is greater than 0, then the target temperature deviation is set to 0.

5. The method according to claim 2, characterized in that, The step of obtaining the third correction factor based on the current position of the temperature control rod and the second correspondence includes: If the current position of the temperature control rod meets the first condition, then the third correction factor is set as the correction factor corresponding to the first condition. The second correspondence includes the first condition and the correction factor corresponding to the first condition. The first condition is that the current position of the temperature control rod is greater than or equal to the first position threshold and less than the second position threshold. If the current position of the temperature control rod meets the second condition, then the third correction factor is set as the correction factor corresponding to the second condition. The second correspondence includes the second condition and the correction factor corresponding to the second condition. The second condition is that the current position of the temperature control rod is greater than or equal to the second position threshold and less than the third position threshold. If the current position of the temperature control rod meets the third condition, then the third correction factor is set as the correction factor corresponding to the third condition. The second correspondence includes the third condition and the correction factor corresponding to the third condition. The third condition is that the current position of the temperature control rod is greater than or equal to the third position threshold and less than the fourth position threshold.

6. The method according to claim 1, characterized in that, The process of acquiring the reactor's power and determining the target right-hand limit minimum margin based on the reactor power includes: The reactor's power output is collected; The axial power deviation is calculated based on the reactor's power output. The right limit of the axial power deviation is obtained by calculating based on the axial power deviation and the stack power. The right limit margin is obtained by calculating the difference between the right limit of the axial power deviation and the axial power deviation. The minimum value among the right limit margins obtained from multiple power measurements is taken as the target right limit minimum margin.

7. The method according to claim 1, characterized in that, The step of determining the second correction factor based on the target right-limit minimum margin and the first correspondence includes: If the target right limit minimum margin satisfies the fourth condition, then the second correction factor is set as the correction factor corresponding to the fourth condition. The first correspondence includes the fourth condition and the correction factor corresponding to the fourth condition. The fourth condition is that the target right limit minimum margin is greater than or equal to the first right limit minimum margin threshold and less than the second right limit minimum margin threshold. If the target right limit minimum margin satisfies the fifth condition, then the second correction factor is set as the correction factor corresponding to the fifth condition. The first correspondence includes the fifth condition and the correction factor corresponding to the fifth condition. The fifth condition is that the target right limit minimum margin is greater than or equal to the second right limit minimum margin threshold and less than the third right limit minimum margin threshold.

8. The method according to claim 1, characterized in that, After calculating the power correction factor based on the first correction factor and the second correction factor, the method further includes: If the automatic control button is detected to be set to a preset state, the power correction factor is set to 0.

9. The method according to claim 2, characterized in that, The calculation of the power correction factor based on the first correction factor, the second correction factor, and the third correction factor includes: The power correction factor is obtained by subtracting the second correction factor from the sum of the first correction factor and the third correction factor.

10. A device for determining the power correction factor of a reactor, characterized in that, The device includes: The detection module is used to calculate a first correction factor based on the average temperature deviation if the average temperature deviation of the primary loop of the reactor is less than a temperature threshold. The average temperature deviation is obtained by subtracting the measured average temperature of the coolant in the primary loop from the reference average temperature of the coolant in the primary loop. The acquisition module is used to acquire the reactor power and determine the target right limit minimum margin based on the reactor power. The first calculation module is used to determine the second correction factor based on the target right limit minimum margin and the first correspondence relationship, wherein the first correspondence relationship is used to characterize the correspondence relationship between the right limit minimum margin and the correction factor. The second calculation module is used to calculate a power correction factor based on the first correction factor and the second correction factor. The power correction factor is used to adjust the position of the power control rods in the reactor, thereby affecting the position of the temperature control rods and thus adjusting the average temperature of the primary loop.

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