Method and device for determining bypass flow of reactor

Abstract

The invention relates to a method and a device for determining bypass flow of a reactor. The method comprises the following steps: acquiring first bypass flow of a bypass flow area in a loop in a current reactor; according to the first bypass flow, the first flow of a flow channel connected with the bypass flow area at the current time and the first pressure of each node connected with the flow channel are determined; determining a second bypass flow of the next bypass flow area based on the first pressure; according to the second bypass flow, the second flow channel flow of the next flow channel is determined; and determining a target bypass flow rate of the reactor based on a first difference between the first bypass flow rate and the second bypass flow rate and a second difference between the first flow channel flow rate and the second flow channel flow rate. According to the embodiment of the invention, after the first bypass flow of the bypass flow area is obtained, the first bypass flow is coupled to the determination of the flow of the flow channel in the flow area in the loop, so that all bypass flows in a reactor steady state are obtained by adopting an iterative solution mode, and the method can be simultaneously suitable for bypass flow steady-state calculation in large and small pressurized water reactors.

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 bypass flow rate of a reactor. Background Technology

[0002] The bypass flow rate of a reactor refers to all flow rates other than those used to cool the reactor core. The magnitude of the bypass flow rate directly affects the reactor's pressure drop and heat transfer, thus impacting reactor safety. Therefore, determining the various bypass flow rates of a reactor is of great significance for conducting reactor hydraulic design.

[0003] Currently, methods for determining bypass flow rate can only simulate the bypass flow rate in the pressure vessel of a large pressurized water reactor. However, small pressurized water reactors have a primary loop flow path, which is characterized by multiple and dispersed confluence points. Their bypass flow rate is not limited to the pressure vessel, making existing methods for determining bypass flow rate unsuitable for small pressurized water reactors. Summary of the Invention

[0004] Therefore, it is necessary to provide a method and apparatus for determining the bypass flow rate of a small pressurized water reactor, which can be applied to the above-mentioned technical problems.

[0005] In a first aspect, this application provides a method for determining the bypass flow rate of a reactor, including:

[0006] Obtain the first bypass flow rate in the bypass region of the primary loop in the current reactor;

[0007] Based on the first bypass flow rate, determine the first flow rate of the channel currently connected to the bypass area, and the first pressure of each node connected to the channel;

[0008] The second bypass flow rate of the bypass area is determined based on the first pressure.

[0009] The second flow rate of the flow channel is determined next time based on the second bypass flow rate and the first flow channel flow rate;

[0010] The target bypass flow rate of the reactor is determined based on the first difference between the first bypass flow rate and the second bypass flow rate, and the second difference between the first flow channel flow rate and the second flow channel flow rate.

[0011] In one embodiment, when the current flow is the first time, determining the first flow channel flow rate of the channel connected to the bypass region and the first pressure of each node connected to the channel based on the first bypass flow rate includes:

[0012] Based on the preset flow rate of each flow channel and the first bypass flow rate, determine the first flow channel pressure loss of each flow channel and the second pressure of each node for the current time;

[0013] Based on the pressure loss of each of the first flow channels, determine the flow rate of the third flow channel for the current time.

[0014] Based on the flow rate of each of the third channels, determine the pressure loss of each of the current channels.

[0015] The first flow rate of each flow channel and the first pressure of each node are determined based on the pressure loss of the third flow channel, the pressure loss of the first flow channel, the flow rate of the third flow channel, and the second pressure of each node.

[0016] In one embodiment, determining the first channel pressure loss of each of the channels and the second pressure of each node based on the preset channel flow rate and the first bypass flow rate of each of the channels includes:

[0017] Based on the preset flow rate of each flow channel, determine the pressure loss of the second flow channel corresponding to each flow channel in the current iteration;

[0018] The first linear coefficient for the current iteration is determined based on the pressure loss of the second flow channel and the preset flow channel flow rate.

[0019] Based on the first bypass flow rate and each of the first linear coefficients, determine the first flow channel pressure drop and each of the second pressures for the current flow channels.

[0020] In one embodiment, determining the first flow rate of each flow channel and the first pressure of each node based on the third flow channel pressure drop, the first flow channel pressure drop, the third flow channel flow rate, and the second pressure of each node includes:

[0021] Determine the pressure loss deviation between the first flow channel pressure loss and the third flow channel pressure loss;

[0022] The first flow rate of each flow channel and the first pressure of each node are determined based on the pressure loss deviation, the flow rate of the third flow channel, and the second pressure of each node.

[0023] In one embodiment, determining the first flow rate of each flow channel and the first pressure of each node based on the pressure loss deviation, the third flow channel flow rate, and the second pressure of each node includes:

[0024] If the pressure loss deviation is less than the preset pressure loss deviation, the flow rate of the third flow channel is taken as the flow rate of the first flow channel, and each of the second pressures is taken as the first pressure.

[0025] In one embodiment, the method further includes:

[0026] If the pressure loss deviation is not less than the preset pressure loss deviation, the second linear coefficient for the current iteration is determined based on the pressure loss of the third flow channel and the flow rate of the third flow channel.

[0027] Determine the mean of the linear coefficients of the first linear coefficient and the second linear coefficient;

[0028] The mean of the linear coefficients is used as the current second-new first linear coefficient. The process returns to the step of determining the first flow channel pressure loss and the second pressure of each flow channel based on the first bypass flow rate and each of the first linear coefficients, until the pressure loss deviation is less than the preset pressure loss deviation.

[0029] In one embodiment, when the current iteration is the first, obtaining the first bypass flow rate of the bypass region in the primary loop of the reactor in the current iteration includes:

[0030] The ultimate pressure of the bypass area is determined based on the preset initial pressure and preset pressure deviation of the bypass area for the current time; the ultimate pressure includes an upper pressure limit and a lower pressure limit.

[0031] Based on the preset upstream pressure and preset downstream pressure of the bypass area, determine the first flow rate of the flange orifice and the second flow rate of the guide cylinder in the bypass area corresponding to the ultimate pressure;

[0032] Determine a first relationship between the first flow rate and the second flow rate under the upper pressure limit, and determine a second relationship between the first flow rate and the second flow rate under the lower pressure limit;

[0033] The first bypass flow rate of the bypass region is determined based on the first size relationship and the second size relationship.

[0034] In one embodiment, determining the first bypass flow rate of the bypass region based on the first size relationship and the second size relationship includes:

[0035] In the case where the first size relationship and the second size relationship are inconsistent, determine the pressure deviation and average pressure between the current pressure upper limit and the pressure lower limit;

[0036] If the pressure deviation is less than a preset deviation threshold, the average pressure is determined to be the target pressure of the bypass area;

[0037] The first bypass flow rate is determined based on the target pressure, the preset upstream pressure of the bypass region, and the preset downstream pressure of the bypass region.

[0038] In one embodiment, the method further includes:

[0039] When the first magnitude relationship and the second magnitude relationship are consistent, the preset pressure deviation is adjusted to obtain a new preset pressure deviation, and the process returns to the step of determining the current limit pressure of the bypass area based on the preset initial pressure and the preset pressure deviation, until the first magnitude relationship and the second magnitude relationship are inconsistent.

[0040] In one embodiment, the method further includes:

[0041] If the pressure deviation is not less than the preset deviation threshold, the limit pressure is adjusted according to the average pressure to obtain the new limit pressure for the current time, and the process returns to the step of determining the pressure deviation and average pressure between the upper and lower pressure limits for the current time, until the pressure deviation is less than the preset deviation threshold.

[0042] In one embodiment, determining the target bypass flow rate of the reactor based on a first difference between the first bypass flow rate and the second bypass flow rate, and a second difference between the first channel flow rate and the second channel flow rate, includes:

[0043] If the first difference is less than a preset bypass flow rate difference threshold and the second difference is less than a preset channel flow rate difference threshold, the second bypass flow rate and the bypass flow rate in the second channel flow rate are taken as the target bypass flow rate.

[0044] Secondly, this application also provides a reactor bypass flow determination device, comprising:

[0045] The acquisition module is used to acquire the first bypass flow rate of the bypass region in the primary loop of the current reactor.

[0046] The first determining module is used to determine, based on the first bypass flow rate, the first flow rate of the channel currently connected to the bypass area, and the first pressure of each node connected to the channel;

[0047] The second determining module is used to determine the second bypass flow rate of the bypass area for the next time based on the first pressure.

[0048] The third determining module is used to determine the second flow channel flow rate of the flow channel next time based on the second bypass flow rate and the first flow channel flow rate;

[0049] The fourth determining module is used to determine the target bypass flow rate of the reactor based on the first difference between the first bypass flow rate and the second bypass flow rate, and the second difference between the first flow channel flow rate and the second flow channel flow rate.

[0050] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method steps provided in the first aspect.

[0051] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method steps provided in the first aspect.

[0052] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the method steps provided in the first aspect.

[0053] The aforementioned method for determining the bypass flow rate of a reactor involves: obtaining the first bypass flow rate of the bypass region in the primary loop of the current reactor; determining the first flow channel flow rate of the current flow channel connected to the bypass region, and the first pressure of each node connected to the flow channel, based on the first pressure; determining the second bypass flow rate of the next bypass region based on the first pressure; determining the second flow channel flow rate of the next flow channel based on the second bypass flow rate; and determining the target bypass flow rate of the reactor based on the first difference between the first and second bypass flow rates, and the second difference between the first and second flow channel flow rates. In this embodiment, for each bypass region, after obtaining the first bypass flow rate of the bypass region, the first bypass flow rate can be coupled to the determination of the flow channel flow rate in the primary loop to obtain other bypass flows in the flow channel. This allows for iterative solution to obtain all bypass flows at reactor steady state, and can be applied to both large and small pressurized water reactors for steady-state bypass flow rate calculation, improving the range and accuracy of bypass flow rate determination. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0055] Figure 1 This is a diagram illustrating the application environment of a reactor bypass flow determination method in one embodiment.

[0056] Figure 2 This is a flowchart illustrating a method for determining the bypass flow rate of a reactor in one embodiment.

[0057] Figure 3This is a flowchart illustrating a method for determining the bypass flow rate of a reactor in another embodiment;

[0058] Figure 4 This is a schematic diagram of the modeling of one loop in one embodiment;

[0059] Figure 5 This is a schematic diagram of the modeling of the bypass region in one embodiment;

[0060] Figure 6 This is a flowchart illustrating a method for determining the flow rate and pressure of a first flow channel in one embodiment.

[0061] Figure 7 This is a flowchart illustrating a method for determining the flow rate and pressure of the first channel in another embodiment;

[0062] Figure 8 This is a flowchart illustrating the first bypass traffic acquisition method in one embodiment;

[0063] Figure 9 This is a flowchart illustrating the first bypass traffic acquisition method in another embodiment;

[0064] Figure 10 This is a structural block diagram of a reactor bypass flow determination device in one embodiment. Detailed Implementation

[0065] 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.

[0066] It should be noted that the terms "first," "second," etc., used in this application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the embodiments, or any combination of multiple embodiments.

[0067] The reactor bypass flow determination method provided in this application embodiment can be applied to, for example, Figure 1 The application environment shown includes a computer device, which may be a server, and its internal structure diagram may be as follows. Figure 1As shown, the computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs in the non-volatile storage media. The database stores bypass flow determination data. The I / O interfaces are used for information exchange between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When executed by the processor, the computer program implements a bypass flow determination method for a reactor.

[0068] Those skilled in the art will understand that Figure 1 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0069] In one exemplary embodiment, such as Figure 2 As shown, a method for determining the bypass flow rate of a reactor is provided, which can be applied to... Figure 1 The following explanation uses computer equipment as an example, including the following steps S201 to S205. Wherein:

[0070] S201, obtain the first bypass flow rate of the bypass region in the primary loop of the current reactor.

[0071] In a reactor, the primary loop refers to the closed loop that circulates the heat generated by the fission of nuclear fuel in the reactor core through a coolant (usually high-temperature, high-pressure water). It mainly consists of the reactor core, main pumps, steam generators, etc.

[0072] Optionally, there can be one or more bypass areas.

[0073] In the embodiments of this application, such as Figures 3-5 As shown, when the current flow is the first flow, the primary loop can be modeled by dividing it into a bypass region and a flow region connected to the bypass region. Figure 4 and Figure 5The bypass region in the design is the upper head. The bypass phenomenon of the upper head is complex and was simulated separately. In fact, different bypass regions (such as pressure vessels) can be simulated separately to meet the simulation needs of different bypass regions.

[0074] The bypass region and the flow region are initialized. This involves setting the preset initial pressure, preset pressure deviation, preset flow rate, preset upstream pressure, preset downstream pressure, geometric parameters, and damping characteristic parameters of both the bypass and flow regions. Based on the preset initial pressure and preset pressure deviation of the bypass region, the upper and lower pressure limits of the current bypass region are determined. The first flow rate of the flange orifice in the bypass region is determined based on the preset upstream and upper pressure limits, and the second flow rate of the guide tube is determined based on the preset downstream and upper pressure limits, thus obtaining the first flow rate of the flange orifice and the second flow rate of the guide tube corresponding to the upper pressure limit. Similarly, the first flow rate of the flange orifice and the second flow rate of the guide tube are determined based on the preset upstream and lower pressure limits, thus obtaining the first flow rate of the flange orifice and the second flow rate of the guide tube corresponding to the lower pressure limit. Further, a first relationship between the first and second flow rates under the upper pressure limit and a second relationship between the first and second flow rates under the lower pressure limit are determined. Based on these first and second relationships, the first bypass flow rate of the bypass region is determined.

[0075] In one possible implementation, if the current flow is not the first, the current upstream pressure and current downstream pressure are obtained based on the pressure of the nodes connected to each flow channel obtained in the previous flow. The flow rate of the flange orifice and the flow rate of the guide tube are determined based on the current upstream pressure, the current downstream pressure and the target pressure obtained for the first time in the bypass region. That is, the flow rate of the flange orifice is determined based on the current upstream pressure and the target pressure, and the flow rate of the guide tube is determined based on the current downstream pressure and the target pressure. The flow rate of the flange orifice and the flow rate of the guide tube are used as the first bypass flow rate of the current bypass region.

[0076] S202, based on the first bypass flow rate, determine the first flow rate of the current flow channel connected to the bypass area, and the first pressure of each node connected to the flow channel.

[0077] The first flow channel flow rate includes the effective flow rate of each main flow channel and the bypass flow rate of the bypass flow channel.

[0078] In this embodiment of the application, when the current step is the first step, the first flow channel pressure loss of each flow channel and the second pressure of each node are determined according to the preset flow channel flow rate of each flow channel and the first bypass flow rate corresponding to the first step. The third flow channel flow rate of each flow channel is determined according to the first flow channel pressure loss. The third flow channel pressure loss of each flow channel is further determined according to the third flow channel flow rate. The first flow channel flow rate of each flow channel is determined according to the pressure loss deviation between the first flow channel pressure loss and the third flow channel pressure loss, the third flow channel flow rate and the second pressure of each node.

[0079] In one possible implementation, if the current flow is not the first flow, the first flow channel pressure loss of each flow channel and the second pressure of each node are determined based on the flow channel flow rate obtained in the previous flow and the first bypass flow rate corresponding to the previous flow. Thus, the first flow channel flow rate of each flow channel is obtained based on the first flow channel pressure loss and the second pressure of each node.

[0080] S203, determine the second bypass flow rate of the next bypass area based on the first pressure.

[0081] In this embodiment of the application, the next upstream pressure and the next downstream pressure of the bypass region can be obtained based on the first pressure of the current time. Based on the next upstream pressure and the target pressure of the bypass region, the flow rate of the flange orifice is determined. Based on the next downstream pressure and the target pressure of the bypass region, the flow rate of the guide tube is determined. The flow rate of the flange orifice and the flow rate of the guide tube are used as the second bypass flow rate of the bypass region in the next time.

[0082] S204, determine the second flow path flow rate for the next flow path based on the second bypass flow rate and the first flow path flow rate.

[0083] In this embodiment, the second flow rate of the next flow path can be obtained in the manner described in S202 above. That is, the second bypass flow rate of the next bypass region is used to replace the first bypass flow rate of the previous bypass region, and the first flow rate of the current flow path is used to replace the flow rate of the previous flow path. The second flow rate of the next flow path can be obtained by calculating in the same way.

[0084] S205, based on the first difference between the first bypass flow rate and the second bypass flow rate, and the second difference between the first flow channel flow rate and the second flow channel flow rate, the target bypass flow rate of the reactor is determined.

[0085] Wherein, if the first difference is less than the preset bypass flow difference threshold and the second difference is less than the preset channel flow difference threshold, the bypass flow in the second bypass flow and the bypass flow in the second channel flow are taken as the target bypass flow.

[0086] Optionally, the preset bypass flow rate difference threshold and the preset channel flow rate difference threshold can be the same or different.

[0087] In this embodiment of the application, if the first difference between the first bypass flow and the second bypass flow in two adjacent transactions is less than a preset bypass flow difference threshold, and the second difference between the first channel flow and the second channel flow in two adjacent transactions is less than a preset channel flow difference threshold, then the bypass flow in the second bypass flow and the second channel flow is taken as the target bypass flow.

[0088] In one possible implementation, if at least one of the two conditions—that the first difference is less than a preset bypass flow difference threshold and the second difference is less than a preset channel flow difference threshold—is not met, then the third pressure of each node for the next iteration is determined based on the second bypass flow. The second bypass flow is used as the new first bypass flow, the second channel flow is used as the new first channel flow, and the third pressure is used as the new first pressure. Steps S203 and S204 are then repeated until the new first difference is less than the preset bypass flow difference threshold and the new second difference is less than the preset channel flow difference threshold.

[0089] In the aforementioned method for determining the bypass flow rate of a reactor, the first bypass flow rate of the bypass region in the primary loop of the reactor is obtained; based on the first bypass flow rate, the first flow channel flow rate of the current flow channel connected to the bypass region is determined, as well as the first pressure of each node connected to the flow channel; based on the first pressure, the second bypass flow rate of the next bypass region is determined; based on the second bypass flow rate, the second flow channel flow rate of the next flow channel is determined; based on the first difference between the first and second bypass flow rates, and the second difference between the first and second flow channel flow rates, the target bypass flow rate of the reactor is determined. In the embodiments of this application, for each bypass region, after obtaining the first bypass flow rate of the bypass region, the first bypass flow rate can be coupled to the determination of the flow channel flow rate in the primary loop flow region to obtain other bypass flows in the flow region flow channel. Thus, all bypass flows at reactor steady state are obtained by iterative solution, which can be applied to the steady-state calculation of bypass flow rate in both large and small pressurized water reactors, improving the range and accuracy of bypass flow rate determination.

[0090] Figure 6 This is a flowchart illustrating a method for determining the flow rate and pressure of the first flow channel in one embodiment, as shown below. Figure 6 As shown, this application embodiment relates to a possible implementation of how to determine the first flow channel flow rate of the current flow channel connected to the bypass area, and the first pressure of each node connected to the flow channel, based on the first bypass flow rate, including the following steps:

[0091] S601, based on the preset flow rate and the first bypass flow rate of each flow channel, determine the first flow channel pressure loss and the second pressure of each node for the current flow channel.

[0092] In this embodiment, based on the preset flow rate and first bypass flow rate of each channel, a linearization method can be used to solve for the first flow rate pressure loss of each channel and the second pressure of each node in the current iteration. Alternatively, a nonlinearization method can be used to obtain the first flow rate pressure loss of each channel and the second pressure of each node in the current iteration.

[0093] Furthermore, based on the preset flow rate and the first bypass flow rate of each flow channel, the first flow channel pressure loss of each flow channel and the second pressure of each node are determined for the current time, including: determining the second flow channel pressure loss corresponding to each flow channel for the current time based on the preset flow rate of each flow channel; determining the first linear coefficient for the current time based on the second flow channel pressure loss and the preset flow rate; and determining the first flow channel pressure loss and the second pressure of each flow channel for the current time based on the first bypass flow rate and each first linear coefficient.

[0094] In this embodiment, formula (1) can be used to determine the flow channel pressure loss corresponding to each flow channel, formula (2) can be used to determine the linear coefficient, and formula (3) can be used to determine the second pressure of each node. Formulas (1), (2), and (3) are specifically expressed as follows:

[0095] (1)

[0096] (2)

[0097] (3)

[0098] Where k is the local resistance coefficient, f is the friction coefficient, L is the length of the flow channel, D is the hydraulic diameter, and W is the flow rate of the flow channel. Density, unit: kg / m³ 3 A represents the flow area of ​​the channel, in m². 2 g is the acceleration due to gravity. For pump pressure loss, The height difference of the flow channel, in meters (m). The flow channel pressure drop is represented by c, which is the linearity coefficient, and W is the flow channel pressure drop. EXT C represents the bypass flow rate of the bypass region, C is the linear coefficient matrix (the matrix composed of the first linear coefficients), and P is the pressure matrix (the second pressure of each node).

[0099] In the current step, W represents the preset flow rate. EXT For the first bypass flow, at this time, This corresponds to the pressure loss in the second flow channel, where W is the preset flow rate in the flow channel. When the pressure loss is in the second flow channel, c corresponds to the first linear coefficient.

[0100] Since the nodes are connected by flow channels, the first flow channel pressure loss of each flow channel is determined based on the second pressure of each node. For example, if node 1 and node 2 are connected by flow channel 1, then the first flow channel pressure loss of flow channel 1 is the difference between the second pressures of node 1 and node 2.

[0101] S602, determine the flow rate of the third flow channel for each of the first flow channels in the current iteration based on the pressure loss of each first flow channel.

[0102] In this embodiment, the pressure loss of each first flow channel is substituted into the above formula (2) to obtain the flow rate of the third flow channel in the current step. The pressure loss of the first flow channel is given by , and c is the first linear coefficient. The flow rate of the third flow channel of each flow channel is obtained based on formula (2).

[0103] S603, determine the pressure loss of the third flow channel for the current time based on the flow rate of each third flow channel.

[0104] In this embodiment of the application, the flow rate of each third channel is substituted into the above formula (1) to obtain the pressure loss of each third channel in the current step. That is, in the current step, W is the flow rate of the third channel of the channel, and the pressure loss of each third channel in the current step is obtained based on formula (1).

[0105] S604, based on the pressure loss of the third flow channel, the pressure loss of the first flow channel, the flow rate of the third flow channel, and the second pressure of each node, determine the first flow channel flow rate of each flow channel and the first pressure of each node.

[0106] In this embodiment, the ratio of the pressure drop of the third flow channel to the pressure drop of the first flow channel can be determined. If the ratio is close to 1, the flow rate of the third flow channel is taken as the flow rate of the first flow channel, and the second pressure is taken as the first pressure. If the ratio of the pressure drop of the third flow channel to the pressure drop of the first flow channel differs significantly from 1, the second linear coefficient for the current iteration is determined based on the pressure drop and flow rate of the third flow channel; the mean of the linear coefficients of the first and second linear coefficients is determined; the mean of the linear coefficients is taken as the new first linear coefficient for the current iteration, and the process returns to the step of determining the pressure drop of the first flow channel and the second pressure of each flow channel based on the first bypass flow rate and each first linear coefficient, until the ratio of the pressure drop of the third flow channel to the pressure drop of the first flow channel is close to 1.

[0107] In one possible implementation, determining the first flow rate of each flow channel and the first pressure of each node based on the pressure loss of the third flow channel, the pressure loss of the first flow channel, the flow rate of the third flow channel, and the second pressure of each node includes: determining the pressure loss deviation between the pressure loss of the first flow channel and the pressure loss of the third flow channel, and determining the first flow rate of each flow channel and the first pressure of each node based on the pressure loss deviation, the flow rate of the third flow channel, and the second pressure of each node.

[0108] In the embodiments of this application, such as Figure 7As shown, the pressure loss deviation can be compared with the preset pressure loss deviation. If the pressure loss deviation is less than the preset pressure loss deviation, the iteration stops. Based on the three-channel flow rate and the second pressure of each node, the first channel flow rate of each channel and the first pressure of each node are output. If the pressure loss deviation is not less than the preset pressure loss deviation, the first linear coefficient is updated, and the process returns to the step of determining the first channel pressure loss and the second pressure of each channel in the current iteration based on the first bypass flow rate and each first linear coefficient.

[0109] Specifically, based on the pressure loss deviation, the flow rate of the third flow channel, and the second pressure of each node, the flow rate of the first flow channel and the first pressure of each node are determined, including the following cases:

[0110] In the first case, if the pressure loss deviation is less than the preset pressure loss deviation, the flow rate of the third flow channel is taken as the flow rate of the first flow channel, and each second pressure is taken as the first pressure.

[0111] The second scenario: If the pressure loss deviation is not less than the preset pressure loss deviation, determine the second linear coefficient for the current iteration based on the pressure loss and flow rate of the third flow channel; determine the average linear coefficient of the first and second linear coefficients; use the average linear coefficient as the new first linear coefficient for the current iteration, and return to execute the steps of determining the first flow channel pressure loss and the second pressure of each flow channel based on the first bypass flow rate and each first linear coefficient, until the pressure loss deviation is less than the preset pressure loss deviation.

[0112] In this embodiment, when the pressure loss deviation is not less than the preset pressure loss deviation, the pressure loss of the third flow channel and the flow rate of the third flow channel are substituted into the above formula (2) to obtain the second linear coefficient for the current step. Let W be the pressure drop in the third flow channel and W be the flow rate in the third flow channel. Obtain the average linear coefficient of the second and first linear coefficients, and use this average as the new first linearization coefficient. Return to the previous step of determining the first flow channel pressure drop and the second pressure for each flow channel based on the first bypass flow rate and each first linear coefficient, until the pressure drop deviation is less than a preset pressure drop deviation. Use the third flow rate corresponding to the pressure drop deviation being less than the preset pressure drop deviation as the first flow channel flow rate, and the corresponding second pressure as the first pressure.

[0113] In this embodiment, the first flow channel pressure loss of each flow channel and the second pressure of each node are determined based on the preset flow channel flow rate and the first bypass flow rate of each flow channel. The third flow channel flow rate of each flow channel is determined based on the first flow channel pressure loss. The third flow channel pressure loss of each flow channel is determined based on the third flow channel flow rate. The first flow channel flow rate of each flow channel and the first pressure of each node are determined based on the third flow channel pressure loss, the first flow channel pressure loss, the third flow channel flow rate, and the second pressure of each node. This embodiment uses an iterative method to obtain the first flow channel flow rate of each flow channel based on the first bypass flow rate of the bypass region, thus improving the accuracy of the first flow channel flow rate determination.

[0114] Figure 8 This is a flowchart illustrating a first bypass traffic acquisition method in one embodiment, as shown below. Figure 8 As shown, this application embodiment relates to a possible implementation of how to obtain the first bypass flow rate of the bypass region in the primary loop of the current reactor, including the following steps:

[0115] S801, determine the ultimate pressure of the current secondary bypass region based on the preset initial pressure and preset pressure deviation of the current secondary bypass region; the ultimate pressure includes the upper pressure limit and the lower pressure limit.

[0116] In this embodiment of the application, it is assumed that the preset initial pressure is 100 and the preset pressure deviation is 20, then the upper pressure limit is 110 and the lower pressure limit is 90.

[0117] S802, based on the preset upstream pressure and preset downstream pressure of the bypass area, determine the first flow rate of the flange orifice and the second flow rate of the guide tube in the bypass area corresponding to the ultimate pressure.

[0118] In this embodiment of the application, the flow rate of the flange orifice is determined according to formulas (4) and (5), and the flow rate of the guide tube is determined according to formulas (6) and (7). Formulas (4)-(7) are specifically expressed as follows:

[0119] (4)

[0120] (5)

[0121] (6)

[0122] (7)

[0123] Where, p FL For the upstream pressure of the bypass area, p HEAD For the pressure in the bypass area, For the density of the bypass area, The height difference between the top of the bypass area and the upper surface of the flange hole, NFL For the number of flange holes, S FL For the area of ​​the flange hole, For the density of flange holes, For the pressure drop of the flange hole, k FL The local resistance coefficient of the flange hole, The height difference between the top of the bypass area and the upper surface of the guide tube. For the i-th guide tube, the downstream pressure of the bypass region, The height difference of the guide tube, N TUBE For the number of guide cylinders, S TUBE For the area of ​​the guide tube, The density of the i-th guide cylinder, Pressure drop of the i-th guide cylinder, k TUBE The local resistance coefficient of the guide cylinder.

[0124] In this embodiment of the application, the first flow rate of the flange orifice and the second flow rate of the guide cylinder are determined for the upper pressure limit. During this process, p HEAD The upper limit of pressure in the bypass region, p FL Preset upstream pressure for the bypass area, Given the preset downstream pressure of the bypass region for the i-th guide tube, the first flow rate of the flange orifice and the second flow rate of the guide tube are obtained based on formulas (4)-(7).

[0125] To determine the first flow rate of the flange orifice and the second flow rate of the guide tube for the lower pressure limit, during this process, p HEAD The lower limit of pressure in the bypass region, p FL Preset upstream pressure for the bypass area, Given the preset downstream pressure of the bypass region for the i-th guide tube, the first flow rate of the flange orifice and the second flow rate of the guide tube are obtained based on formulas (4)-(7).

[0126] S803, determine the first magnitude relationship between the first flow rate and the second flow rate under the upper pressure limit, and determine the second magnitude relationship between the first flow rate and the second flow rate under the lower pressure limit.

[0127] In this embodiment of the application, a first relationship between the first flow rate and the second flow rate under the upper pressure limit is determined, and a second relationship between the first flow rate and the second flow rate under the lower pressure limit is also determined. For example, the first relationship under the upper pressure limit is that the first flow rate is greater than the second flow rate, and the first relationship under the lower pressure limit is also that the first flow rate is greater than the second flow rate.

[0128] S804, determine the first bypass flow rate of the bypass area based on the first size relationship and the second size relationship.

[0129] In the embodiments of this application, based on the first size relationship and the second size relationship, other iterative methods such as Newton's iteration can be used to solve the problem and obtain the target pressure of the current bypass region, thereby obtaining the first bypass flow rate of the bypass region based on the target pressure.

[0130] Furthermore, based on the first and second size relationships, the first bypass flow rate of the bypass region is determined, including the following cases:

[0131] First scenario: Combination Figure 9 As shown, when the first and second pressure relationships are inconsistent, the pressure deviation and average pressure between the current upper and lower pressure limits are determined. If the pressure deviation is less than a preset deviation threshold, the average pressure is determined as the target pressure for the bypass area. Based on the target pressure, the preset upstream pressure of the bypass area, and the preset downstream pressure of the bypass area, the first bypass flow rate is determined. If the pressure deviation is not less than the preset deviation threshold, the limit pressure is adjusted based on the average pressure to obtain the new limit pressure for the current time. The process then returns to the steps of determining the pressure deviation and average pressure between the current upper and lower pressure limits until the pressure deviation is less than the preset deviation threshold.

[0132] In the embodiments of this application, when the first size relationship and the second size relationship are inconsistent, the pressure deviation is obtained by subtracting the pressure upper limit and the pressure lower limit, and the average pressure between the pressure upper limit and the pressure lower limit is obtained.

[0133] If the pressure deviation is less than the preset deviation threshold, the average pressure is used as the target pressure of the bypass area. The target pressure, the preset upstream pressure of the bypass area, and the preset downstream pressure of the bypass area are substituted into the above formulas (4)-(7) to obtain the flow rate of the flange orifice and the flow rate of the guide tube. The flow rate of the flange orifice and the flow rate of the guide tube are used as the first bypass flow rate. In this step, p HEAD The target pressure for the bypass area.

[0134] If the pressure deviation is not less than the preset deviation threshold, the third flow rate of the flange orifice and the fourth flow rate of the guide cylinder corresponding to the average pressure are obtained, and the third magnitude relationship between the third and fourth flow rates is determined. If the third magnitude relationship is the same as the first magnitude relationship, the average pressure is used to replace the pressure upper limit to obtain a new pressure upper limit. The process then returns to obtain the new pressure upper limit and pressure lower limit, the new pressure deviation, and the new average pressure. If the new pressure deviation is less than the preset deviation threshold, the new average pressure is used as the target pressure. If the new pressure deviation is less than the preset deviation threshold, the process continues to obtain the third flow rate of the flange orifice and the fourth flow rate of the guide cylinder corresponding to the new average pressure until the new pressure deviation is less than the preset deviation threshold.

[0135] Similarly, if the third size relationship is the same as the second size relationship, the average pressure replaces the lower pressure limit to obtain a new lower pressure limit, and the upper pressure limit and the new lower pressure limit are retrieved again to obtain a new pressure deviation and a new average pressure.

[0136] The second scenario: If the first and second magnitude relationships are consistent, the preset pressure deviation is adjusted to obtain a new preset pressure deviation. Then, the process returns to the step of determining the limit pressure of the current bypass region based on the preset initial pressure and the preset pressure deviation, until the first and second magnitude relationships are inconsistent.

[0137] In this embodiment, when the first and second magnitude relationships are consistent, the preset pressure deviation is increased to obtain a new preset pressure deviation. The process then returns to the step of determining the limiting pressure of the current bypass region based on the preset initial pressure and the preset pressure deviation, until the first and second magnitude relationships become inconsistent. When the first and second magnitude relationships are inconsistent, the steps corresponding to the first case described above are executed.

[0138] In this embodiment, the ultimate pressure of the current secondary bypass region is determined based on the preset initial pressure and preset pressure deviation of the current secondary bypass region. Based on the preset upstream and downstream pressures of the bypass region, the first flow rate of the flange orifice and the second flow rate of the guide tube in the bypass region corresponding to the ultimate pressure are determined. A first relationship between the first and second flow rates under the upper pressure limit and a second relationship between the first and second flow rates under the lower pressure limit are determined. Based on the first and second relationships, the first bypass flow rate of the bypass region is determined. In this embodiment, by continuously adjusting the upper and lower pressure limits, the target pressure of the bypass region is obtained, thereby obtaining the first bypass flow rate of the bypass region based on the target pressure, laying the foundation for subsequently determining the first flow rate of each channel based on the first bypass flow rate.

[0139] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0140] Based on the same inventive concept, this application also provides a reactor bypass flow determination apparatus for implementing the reactor bypass flow determination method described above. The solution provided by this apparatus is similar to the implementation described in the above method; therefore, the specific limitations of one or more reactor bypass flow determination apparatus embodiments provided below can be found in the limitations of the reactor bypass flow determination method described above, and will not be repeated here.

[0141] In one exemplary embodiment, such as Figure 10 As shown, a reactor bypass flow determination device is provided, comprising: an acquisition module 11, a first determination module 12, a second determination module 13, a third determination module 14, and a fourth determination module 15, wherein:

[0142] The acquisition module 11 is used to acquire the first bypass flow rate of the bypass region in the primary loop of the current reactor.

[0143] The first determining module 12 is used to determine the first flow channel flow rate of the current flow channel connected to the bypass area, and the first pressure of each node connected to the flow channel, based on the first bypass flow rate.

[0144] The second determining module 13 is used to determine the second bypass flow rate of the next bypass region based on the first pressure.

[0145] The third determining module 14 is used to determine the second flow channel flow rate of the next flow channel based on the second bypass flow rate and the first flow channel flow rate;

[0146] The fourth determining module 15 is used to determine the target bypass flow rate of the reactor based on the first difference between the first bypass flow rate and the second bypass flow rate, and the second difference between the first flow channel flow rate and the second flow channel flow rate.

[0147] In one embodiment, the first determining module 12 is specifically configured to determine the first flow channel pressure loss and the second pressure of each node in the current flow based on the preset flow channel flow rate and the first bypass flow rate of each flow channel; determine the third flow channel flow rate of each flow channel in the current flow based on the first flow channel pressure loss; determine the third flow channel pressure loss of each flow channel in the current flow based on the third flow channel flow rate; and determine the first flow channel flow rate and the first pressure of each node based on the third flow channel pressure loss, the first flow channel pressure loss, the third flow channel flow rate and the second pressure of each node.

[0148] In one embodiment, the first determining module 12 is specifically used to determine the second flow channel pressure loss corresponding to each flow channel in the current time based on the preset flow channel flow rate of each flow channel; determine the first linear coefficient of the current time based on the second flow channel pressure loss and the preset flow channel flow rate; and determine the first flow channel pressure loss and the second pressure of each flow channel in the current time based on the first bypass flow rate and each first linear coefficient.

[0149] In one embodiment, the first determining module 12 is specifically used to determine the pressure loss deviation between the first flow channel pressure loss and the third flow channel pressure loss; and to determine the first flow channel flow rate and the first pressure of each node based on the pressure loss deviation, the third flow channel flow rate and the second pressure of each node.

[0150] In one embodiment, the first determining module 12 is specifically used to take the flow rate of the third flow channel as the flow rate of the first flow channel and take each second pressure as the first pressure when the pressure loss deviation is less than the preset pressure loss deviation.

[0151] In one embodiment, the first determining module 12 is specifically used to determine the second linear coefficient for the current time based on the pressure loss of the third flow channel and the flow rate of the third flow channel when the pressure loss deviation is not less than the preset pressure loss deviation; determine the average linear coefficient of the first linear coefficient and the second linear coefficient; use the average linear coefficient as the new first linear coefficient for the current time, and return to execute the steps of determining the first flow channel pressure loss and the second pressure of each flow channel based on the first bypass flow rate and each first linear coefficient, until the pressure loss deviation is less than the preset pressure loss deviation.

[0152] In one embodiment, the acquisition module 11 is specifically used to determine the ultimate pressure of the current secondary bypass region based on the preset initial pressure and preset pressure deviation of the current secondary bypass region; the ultimate pressure includes an upper pressure limit and a lower pressure limit; based on the preset upstream pressure and preset downstream pressure of the bypass region, determine the first flow rate of the flange orifice and the second flow rate of the guide tube in the bypass region corresponding to the ultimate pressure; determine the first magnitude relationship between the first flow rate and the second flow rate under the pressure upper limit, and determine the second magnitude relationship between the first flow rate and the second flow rate under the pressure lower limit; and determine the first bypass flow rate of the bypass region based on the first magnitude relationship and the second magnitude relationship.

[0153] In one embodiment, the acquisition module 11 is specifically used to determine the pressure deviation and average pressure between the current pressure upper limit and pressure lower limit when the first size relationship and the second size relationship are inconsistent; to determine the average pressure as the target pressure of the bypass area when the pressure deviation is less than a preset deviation threshold; and to determine the first bypass flow rate based on the target pressure, the preset upstream pressure of the bypass area and the preset downstream pressure of the bypass area.

[0154] In one embodiment, the acquisition module 11 is specifically used to adjust the preset pressure deviation when the first size relationship and the second size relationship are consistent, to obtain a new preset pressure deviation, and return to execute the step of determining the limit pressure of the current secondary bypass area based on the preset initial pressure and the preset pressure deviation, until the first size relationship and the second size relationship are inconsistent.

[0155] In one embodiment, the acquisition module 11 is specifically used to adjust the limit pressure according to the average pressure to obtain the new limit pressure of the current time when the pressure deviation is not less than the preset deviation threshold, and return to execute the step of determining the pressure deviation and average pressure between the pressure upper limit and the pressure lower limit of the current time, until the pressure deviation is less than the preset deviation threshold.

[0156] In one embodiment, the fourth determining module 12 is specifically used to take the bypass flow rate in the second bypass flow rate and the bypass flow rate in the second channel flow rate as the target bypass flow rate when the first difference is less than a preset bypass flow rate difference threshold and the second difference is less than a preset channel flow rate difference threshold.

[0157] The modules in the aforementioned reactor bypass flow determination device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in hardware within or independently of the processor in a computer device, or stored in software within the memory of a computer device, so that the processor can invoke and execute the corresponding operations of each module.

[0158] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of any of the above method embodiments.

[0159] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the above method embodiments.

[0160] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of any of the above method embodiments.

[0161] 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, data stored, data displayed, 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 the relevant data must comply with relevant regulations.

[0162] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can 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 can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0163] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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 application.

[0164] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for determining the bypass flow rate of a reactor, characterized in that, The method includes: Obtain the first bypass flow rate in the bypass region of the primary loop in the current reactor; Based on the first bypass flow rate, determine the first flow rate of the channel currently connected to the bypass area, and the first pressure of each node connected to the channel; The second bypass flow rate of the bypass area is determined based on the first pressure. The second flow rate of the flow channel is determined next time based on the second bypass flow rate and the first flow channel flow rate; The target bypass flow rate of the reactor is determined based on the first difference between the first bypass flow rate and the second bypass flow rate, and the second difference between the first flow channel flow rate and the second flow channel flow rate.

2. The method according to claim 1, characterized in that, In the case that this is the first time, determining the first flow channel flow rate of the channel connected to the bypass area and the first pressure of each node connected to the channel based on the first bypass flow rate includes: Based on the preset flow rate of each flow channel and the first bypass flow rate, determine the first flow channel pressure loss of each flow channel and the second pressure of each node for the current time; Based on the pressure loss of each of the first flow channels, determine the flow rate of the third flow channel for the current time. Based on the flow rate of each of the third channels, determine the pressure loss of each of the current channels. The first flow rate of each flow channel and the first pressure of each node are determined based on the pressure loss of the third flow channel, the pressure loss of the first flow channel, the flow rate of the third flow channel, and the second pressure of each node.

3. The method according to claim 2, characterized in that, The step of determining the first flow channel pressure loss of each of the flow channels and the second pressure of each of the nodes based on the preset flow channel flow rate and the first bypass flow rate includes: Based on the preset flow rate of each flow channel, determine the pressure loss of the second flow channel corresponding to each flow channel in the current iteration; The first linear coefficient for the current iteration is determined based on the pressure loss of the second flow channel and the preset flow channel flow rate. Based on the first bypass flow rate and each of the first linear coefficients, determine the first flow channel pressure drop and each of the second pressures for the current flow channels.

4. The method according to claim 3, characterized in that, The step of determining the first flow rate of each flow channel and the first pressure of each node based on the pressure loss of the third flow channel, the pressure loss of the first flow channel, the flow rate of the third flow channel, and the second pressure of each node includes: Determine the pressure loss deviation between the first flow channel pressure loss and the third flow channel pressure loss; The first flow rate of each flow channel and the first pressure of each node are determined based on the pressure loss deviation, the flow rate of the third flow channel, and the second pressure of each node.

5. The method according to claim 4, characterized in that, The step of determining the first flow rate of each flow channel and the first pressure of each node based on the pressure loss deviation, the third flow channel flow rate, and the second pressure of each node includes: If the pressure loss deviation is less than the preset pressure loss deviation, the flow rate of the third flow channel is taken as the flow rate of the first flow channel, and each of the second pressures is taken as the first pressure.

6. The method according to claim 5, characterized in that, The method further includes: If the pressure loss deviation is not less than the preset pressure loss deviation, the second linear coefficient for the current iteration is determined based on the pressure loss of the third flow channel and the flow rate of the third flow channel. Determine the mean of the linear coefficients of the first linear coefficient and the second linear coefficient; The mean of the linear coefficients is used as the current second-new first linear coefficient. The process returns to the step of determining the first flow channel pressure loss and the second pressure of each flow channel based on the first bypass flow rate and each of the first linear coefficients, until the pressure loss deviation is less than the preset pressure loss deviation.

7. The method according to claim 1, characterized in that, Determining the target bypass flow rate of the reactor based on a first difference between the first bypass flow rate and the second bypass flow rate, and a second difference between the first channel flow rate and the second channel flow rate, includes: If the first difference is less than a preset bypass flow rate difference threshold and the second difference is less than a preset channel flow rate difference threshold, the second bypass flow rate and the bypass flow rate in the second channel flow rate are taken as the target bypass flow rate.

8. The method according to claim 1, characterized in that, In the case that this is the first time, obtaining the first bypass flow rate of the bypass region in the primary loop of the reactor in this current time includes: The ultimate pressure of the bypass area is determined based on the preset initial pressure and preset pressure deviation of the bypass area for the current time; the ultimate pressure includes an upper pressure limit and a lower pressure limit. Based on the preset upstream pressure and preset downstream pressure of the bypass area, determine the first flow rate of the flange orifice and the second flow rate of the guide cylinder in the bypass area corresponding to the ultimate pressure; Determine a first relationship between the first flow rate and the second flow rate under the upper pressure limit, and determine a second relationship between the first flow rate and the second flow rate under the lower pressure limit; The first bypass flow rate of the bypass region is determined based on the first size relationship and the second size relationship.

9. The method according to claim 8, characterized in that, Determining the first bypass flow rate of the bypass region based on the first magnitude relationship and the second magnitude relationship includes: In the case where the first size relationship and the second size relationship are inconsistent, determine the pressure deviation and average pressure between the current pressure upper limit and the pressure lower limit; If the pressure deviation is less than a preset deviation threshold, the average pressure is determined to be the target pressure of the bypass area; The first bypass flow rate is determined based on the target pressure, the preset upstream pressure of the bypass region, and the preset downstream pressure of the bypass region.

10. A reactor bypass flow determination device, characterized in that, The device includes: The acquisition module is used to acquire the first bypass flow rate of the bypass region in the primary loop of the current reactor. The first determining module is used to determine, based on the first bypass flow rate, the first flow rate of the channel currently connected to the bypass area, and the first pressure of each node connected to the channel; The second determining module is used to determine the second bypass flow rate of the bypass area for the next time based on the first pressure. The third determining module is used to determine the second flow channel flow rate of the flow channel next time based on the second bypass flow rate and the first flow channel flow rate; The fourth determining module is used to determine the target bypass flow rate of the reactor based on the first difference between the first bypass flow rate and the second bypass flow rate, and the second difference between the first flow channel flow rate and the second flow channel flow rate.

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