Method and apparatus for controlling average coolant temperature in a nuclear reactor

Abstract

The embodiment of the application discloses a method and device for controlling the average temperature of a coolant in a nuclear reactor, and relates to the technical field of nuclear reactors. The method comprises the following steps: obtaining the rod position information of a temperature control rod and the average temperature of the coolant in the reactor; then, according to the rod position information and the average temperature of the coolant, state indication information is determined, which is used for indicating the working state of a power control rod in the reactor; first control information of the temperature control rod and second control information of the power control rod are obtained; and according to the state indication information, the first control information and the second control information, target control information is determined, so that the power control rod operates according to the target control information, and efficient control of the average temperature of the coolant is realized in the case that the control ability of the temperature control rod is insufficient.

Description

Technical Field

[0001] This application relates to the field of nuclear reactor technology, and in particular to a method and apparatus for controlling the average temperature of coolant in a nuclear reactor. Background Technology

[0002] In a nuclear reactor, the fission reaction of nuclear fuel in the core releases a large amount of heat. The main function of the coolant is to remove this heat. If the average coolant temperature exceeds the reactor's design range, it will affect the safe operation of the nuclear reactor. Current nuclear reactors, especially pressurized water reactors, use temperature control rods to control the average coolant temperature.

[0003] In related technologies, there are instances where the control capability of temperature control rods is insufficient. In such cases, controlling the average temperature of the coolant is often achieved by quantitatively calculating the adjustment value of the boron concentration to obtain the corresponding adjustment scheme, which is then implemented by the nuclear reactor operation and maintenance personnel. This results in the inability to control the average temperature of the coolant in a timely and efficient manner.

[0004] It is evident that, given the current insufficient control capability of the temperature control rod, there is a problem of low control efficiency for the average temperature of the coolant.

[0005] Application content

[0006] In view of this, one of the objectives of this application is to provide a method and apparatus for controlling the average temperature of coolant in a nuclear reactor, which can improve the control efficiency of the average temperature of coolant when the control capability of the temperature control rod is insufficient.

[0007] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0008] In a first aspect, embodiments of this application provide a method for controlling the average temperature of a coolant in a nuclear reactor, the method comprising:

[0009] The operating status of the temperature control rod and the first control command parameters of the power control rod are obtained. The operating status is used to characterize whether the control capability of the temperature control rod is normal.

[0010] The first control command parameters are updated based on the working state of the temperature control rod to obtain the target control command parameters of the power control rod.

[0011] The control power control rods operate according to the target control command parameters to regulate the average temperature of the coolant in the nuclear reactor.

[0012] In one possible implementation, before updating the first control command parameters based on the operating state of the temperature control rod to obtain the target control command parameters for the power control rod, the method further includes:

[0013] Obtain the second control command parameters for the temperature control rod;

[0014] The first control command parameters are updated based on the operating state of the temperature control rod to obtain the target control command parameters for the power control rod, including:

[0015] The second control command parameters are updated based on the working state of the temperature control rod to obtain the intermediate control command parameters of the temperature control rod.

[0016] The first control command parameters are updated based on the intermediate control command parameters to obtain the target control command parameters.

[0017] In one possible implementation, the second control command parameters are updated based on the operating state of the temperature control rod to obtain intermediate control command parameters for the temperature control rod, including:

[0018] Determine the target control coefficient based on the operating status of the temperature control rod;

[0019] Use the target control coefficient as an intermediate control command parameter;

[0020] The target control coefficient varies depending on the operating state of the temperature control rod.

[0021] In one possible implementation, determining the target control coefficient based on the operating state of the temperature control rod includes:

[0022] When the temperature control rod is in the first state, the target control coefficient is determined according to the first control command parameter and the second control command parameter. The first state is used to indicate that the control capability of the temperature control rod is abnormal.

[0023] When the temperature control rod is in the second operating state, the target control coefficient is determined to be zero. The second state is used to indicate that the control capability of the temperature control rod is normal.

[0024] In one possible implementation, determining the target control coefficient based on the first control command parameters and the second control command parameters includes:

[0025] Divide the first control command parameter by the second control command parameter to obtain the target control coefficient.

[0026] In one possible implementation, after updating the first control command based on the operating state of the temperature control rod to obtain the target control command parameters for the power control rod, the method further includes:

[0027] Input the target control command parameters into the preset function generator to obtain the rod speed information of the power control rod;

[0028] The control power control rods operate according to target control command parameters to regulate the average temperature of the coolant in the nuclear reactor, including:

[0029] The power control rods operate according to the rod speed information to regulate the average temperature of the coolant in the nuclear reactor.

[0030] In one possible implementation, obtaining the operating status of the temperature control rod includes:

[0031] Obtain the position information of the temperature control rods and the average temperature of the coolant in the nuclear reactor;

[0032] The working state of the temperature control rod is determined when the rod position information is outside the first preset threshold range and the average temperature of the coolant in the nuclear reactor is outside the second preset threshold range.

[0033] The first preset threshold range and the second preset threshold range are different threshold ranges.

[0034] In one possible implementation, before determining the operating state of the temperature control rod when the rod position information is outside a first preset threshold range and the average coolant temperature is outside a second preset threshold range, the method further includes:

[0035] Acquire target monitoring information, including the operating status of temperature control rods and / or the operating status of the nuclear reactor;

[0036] When the rod position information is outside the first preset threshold range and the average coolant temperature is outside the second preset threshold range, the operating state of the temperature control rod is determined, including:

[0037] If the rod position information is outside the first preset threshold range, the average coolant temperature is outside the second preset threshold range, and the target monitoring information meets the preset conditions, the working state of the temperature control rod is determined to be the first state. The first state is used to indicate that the control capability of the temperature control rod is abnormal.

[0038] If the rod position information is outside the first preset threshold range, the average coolant temperature is outside the second preset threshold range, and the target monitoring information does not meet the preset conditions, the working state of the temperature control rod is determined to be the second state. The second state is used to indicate that the control capability of the temperature control rod is normal.

[0039] In one possible implementation, the preset conditions include:

[0040] The temperature control rod is operating abnormally; and / or,

[0041] The nuclear reactor is operating normally.

[0042] Secondly, embodiments of this application also provide a device for controlling the average temperature of the coolant in a nuclear reactor, applied to a nuclear reactor including temperature control rods and power control rods, the device comprising:

[0043] The acquisition module is used to acquire the working status of the temperature control rod and the first control command parameters of the power control rod. The working status is used to characterize whether the control capability of the temperature control rod is normal.

[0044] The update module is used to update the first control command parameters based on the working state of the temperature control rod to obtain the target control command parameters of the power control rod.

[0045] The control module is used to control the power control rods to operate according to the target control command parameters in order to regulate the average temperature of the coolant in the nuclear reactor.

[0046] This application provides a method for controlling the average temperature of coolant in a nuclear reactor. The method involves acquiring the position information of temperature control rods and the average coolant temperature, then determining status indication information based on these information. This status indication information indicates the operating status of the power control rods in the reactor. Next, first control information for the temperature control rods and second control information for the power control rods are acquired. Based on the status indication information, the first control information, and the second control information, target control information is determined to control the power control rods to operate according to the target control information. This achieves efficient control of the average coolant temperature even when the control capability of the temperature control rods is insufficient. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. It should be understood that the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 A flowchart illustrating a method for controlling the average temperature of coolant in a nuclear reactor, provided as an embodiment of this application;

[0049] Figure 2 A schematic diagram illustrating the control function triggering of a method for controlling the average temperature of coolant in a nuclear reactor, provided in an embodiment of this application.

[0050] Figure 3 A schematic diagram illustrating the control functions included in a method for controlling the average temperature of coolant in a nuclear reactor, provided in an embodiment of this application;

[0051] Figure 4A schematic diagram of the functional modules of a device for controlling the average temperature of coolant in a nuclear reactor, provided for an embodiment of this application;

[0052] Figure 5 This is a diagram illustrating the internal structure of an electronic device as provided in an embodiment of this application.

[0053] Figure reference numerals: 400, device for controlling the average temperature of coolant in nuclear reactor; 410, acquisition module; 420, update module; 430, control module. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0055] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0056] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0057] In various embodiments of this application, the expression "or" or "at least one of A and / or B" includes any combination or all combinations of the words listed simultaneously. For example, the expression "A or B" or "at least one of A and / or B" may include A, may include B, or may include both A and B.

[0058] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0059] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0060] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0061] Furthermore, in the embodiments of this application, the term "connection" can refer to "electrical connection" or "direct connection." "Electrical connection" can refer to a direct electrical connection between two components, or it can refer to an electrical connection between two components via one or more normally open tubes or other components.

[0062] To facilitate a better understanding of the solutions in the embodiments of this application, the relevant technologies will be introduced first below.

[0063] Control rods are absorber rods made of neutron-absorbing materials used to control the rate of a chain reaction at a predetermined level. Control rods can be used to compensate for fuel consumption and regulate the reaction rate; safety rods are used to quickly stop the chain reaction. Absorber materials are typically boron, boron carbide, cadmium, silver indium cadmium, etc.

[0064] Generally, control rods can be categorized by function into temperature control rods, power control rods, and shutdown control rods. Temperature control rods are commonly used to control the average coolant temperature, power control rods are commonly used to control reactor power, and shutdown control rods are commonly used for emergency shutdowns. Temperature control rods can also be simply referred to as temperature rods or R-rods, power control rods as power rods, N-rods, or G-rods, and shutdown control rods as shutdown rods or S-rods. For consistency, they will be referred to as temperature control rods and power control rods in the following embodiments.

[0065] A coolant is a fluid that flows through or surrounds a system to prevent it from overheating. It uses or dissipates heat by transferring it from one system to another. An ideal coolant has high heat capacity, low viscosity, is inexpensive, non-toxic, chemically inert, and neither corrosive nor promoting corrosion. Specifically, within a certain temperature range, a coolant can remove heat generated in a nuclear reactor, and this removed heat can be converted into mechanical energy through various devices.

[0066] The coolant mean temperature can be understood as the average temperature of the coolant in a certain region of the reactor system or after a period of circulation. During this cycle, the temperature of the coolant varies at different locations. By calculating its average temperature throughout the entire circulation loop, the thermal performance of the reactor system can be better evaluated.

[0067] Generally, if the average coolant temperature is too low, it can easily lead to a decrease in heat transfer efficiency within the reactor. The heat generated by the fission reaction of nuclear fuel cannot be effectively and promptly removed, thus limiting the reactor's power output and preventing it from reaching its designed rated power, affecting power generation efficiency or the effectiveness of other applications. If the average coolant temperature is too high, the temperature difference between it and the reactor core decreases, reducing the driving force for heat transfer. This leads to a decline in the coolant's ability to remove heat, potentially causing the core temperature to rise further, creating a vicious cycle and easily leading to core overheating.

[0068] To address the technical problems in the background art, embodiments of this application provide a method and apparatus for controlling the average temperature of the coolant in a nuclear reactor. The method for controlling the average temperature of the coolant in a nuclear reactor provided by embodiments of this application will be described below.

[0069] Please see Figure 1 , Figure 1 This application provides a flowchart of a method for controlling the average temperature of the coolant in a nuclear reactor. This method can be applied to the apparatus for controlling the average temperature of the coolant in a nuclear reactor described in the following embodiments, or to the electronic devices described in the following embodiments. The electronic devices in the following embodiments include personal computers, servers, mobile devices, cloud computing platforms, and supercomputers, etc. This method for controlling the average temperature of the coolant in a nuclear reactor can be applied to nuclear reactors including temperature control rods and power control rods. The following description will focus on its application to electronic devices, and the method specifically includes the following steps:

[0070] Step 110: Obtain the operating status of the temperature control rod and the first control command parameters of the power control rod. The operating status is used to characterize whether the control capability of the temperature control rod is normal.

[0071] Step 120: Update the first control command parameters based on the working state of the temperature control rod to obtain the target control command parameters of the power control rod.

[0072] Step 130: Control the power control rods to operate according to the target control command parameters in order to regulate the average temperature of the coolant in the nuclear reactor.

[0073] This application provides a method for controlling the average temperature of coolant in a reactor. The method involves acquiring the position information of temperature control rods and the average coolant temperature, then determining status indication information based on these information. This status indication information indicates the operating status of the power control rods in the reactor. Next, first control information for the temperature control rods and second control information for the power control rods are acquired. Based on the status indication information, the first control information, and the second control information, target control information is determined to control the power control rods to operate according to the target control information. This achieves efficient control of the average coolant temperature even when the control capability of the temperature control rods is insufficient.

[0074] The following will discuss how Figure 1 The steps involved in controlling the average temperature of the coolant in a nuclear reactor are described in detail.

[0075] In step 110, the relevant information of the temperature control rod, namely the working status of the temperature control rod, and the relevant information of the power control rod, namely the first control command parameters, can be obtained through the electronic device.

[0076] The operating status of the temperature control rod described above can be used to characterize its control capability. Specifically, the operating status of the temperature control rod can be used to characterize whether its control capability is normal or abnormal.

[0077] The aforementioned first control command parameters can be used to control the operation of the power control rod, such as controlling the position, moving speed, moving direction, and moving time of the power control rod.

[0078] In some embodiments, the first control command parameters include position command parameters, which can be used to control the position of the power rods in the reactor core.

[0079] Specifically, the position command parameters may include absolute position command parameters and relative position command parameters. The absolute position command parameters can be used to specify the insertion depth of the power control rod in the nuclear reactor core, such as specifying that the power control rod is inserted into the core by 100 cm. The relative position command parameters can be used to specify the movement command of the power control rod relative to its current position, such as specifying that the power control rod is moved up or down by 100 cm relative to its current position.

[0080] In some embodiments, the first control command parameters include a movement speed command parameter, which can be used to control the movement speed of the power control rods in the reactor core.

[0081] Specifically, the movement speed command parameters may include constant speed command parameters and variable speed command parameters. The constant speed command parameter can be used to specify that the power control rod moves at a fixed speed, such as moving 2 centimeters per second. The variable speed command parameter can be used to dynamically adjust the movement speed of the power control rod, such as moving 1 centimeter per second from the 1st second to the 5th second, and moving 2 centimeters per second from the 5th second to the 10th second.

[0082] In some embodiments, the first control command parameters include movement direction command parameters, which can be used to control the movement direction of the power control rod, such as moving it upward (towards the top of the nuclear reactor) or downward (towards the bottom of the nuclear reactor).

[0083] In some embodiments, the first control command parameter includes an action time command parameter, which can be used to control the timing or duration of the power control rod's action.

[0084] Specifically, the action time command parameters may include start action time command parameters and duration action time command parameters. The start action time command parameter can be used to specify the exact moment when the power control stick begins to act; the duration action time command parameter can be used to specify the duration for which the power control stick maintains a certain action or state, such as maintaining downward movement for 30 seconds.

[0085] The parameters of the first control command mentioned above can be obtained at the same time as the working status of the temperature control rod.

[0086] The control capability of the temperature control rod can be understood as its ability to control the average temperature of the coolant in the nuclear reactor. If the temperature control rod can maintain the average temperature of the coolant within a certain range when it moves upward or downward in the reactor core, it indicates that the control capability of the temperature control rod is normal. Otherwise, it indicates that the control capability of the temperature control rod is abnormal or insufficient.

[0087] The electronic device can acquire the working status of the temperature control rod and the first control command parameters of the power control rod in real time, or it can acquire the working status of the temperature control rod and the first control command parameters of the power control rod when preset conditions are met.

[0088] In some embodiments, the preset conditions satisfied by the above-mentioned electronic device may include any of the following:

[0089] The monitoring time of the electronic device reaches the preset time;

[0090] The electronic device received the acquisition command.

[0091] The aforementioned acquisition instructions can be manually entered into the electronic device.

[0092] In step 120, the electronic device can update the first control command parameters according to the working state of the temperature control rod to obtain the target control command parameters for directly controlling the power control rod.

[0093] Specifically, the target control command parameters obtained by updating the first control command parameters will also be different depending on the working state of the temperature control rod.

[0094] For example, when the temperature control rod is operating normally, the first control command parameter is not updated, or it can be understood that the updated target control command parameter is the same as the first control command parameter; when the temperature control rod is operating abnormally, the updated target control command parameter is different from the first control command parameter.

[0095] In step 130, the electronic device can control the operation of the power control rod according to the target control command parameters obtained above, thereby achieving regulation of the average temperature of the coolant in the nuclear reactor.

[0096] Specifically, controlling the depth, speed, direction, and duration of the power control rod insertion into the nuclear reactor core can all achieve the regulation of the average temperature of the coolant.

[0097] This application embodiment controls the average temperature of the coolant in a nuclear reactor by controlling the power control rod. In cases where the control capability of the temperature control rod is abnormal or insufficient, it avoids the situation where the control efficiency of the average temperature of the coolant is low and a large amount of nuclear wastewater is generated due to the quantitative calculation and adjustment of the boron concentration by the nuclear reactor operation and maintenance personnel. This achieves efficient control of the average temperature of the coolant.

[0098] In one possible implementation, before updating the first control command parameters based on the operating state of the temperature control rod to obtain the target control command parameters for the power control rod, the method further includes:

[0099] Obtain the second control command parameters for the temperature control rod;

[0100] The first control command parameters are updated based on the operating state of the temperature control rod to obtain the target control command parameters for the power control rod, including:

[0101] The second control command parameters are updated based on the working state of the temperature control rod to obtain the intermediate control command parameters of the temperature control rod.

[0102] The first control command parameters are updated based on the intermediate control command parameters to obtain the target control command parameters.

[0103] This application embodiment obtains the second control command parameters of the temperature control rod and updates the first control command parameters in the aforementioned embodiment based on the intermediate control command parameters obtained by updating the second control command parameters. This can improve the accuracy and reliability of determining the target control command parameters. The determined target control command parameters can achieve efficient regulation of the average temperature of the coolant in the nuclear reactor.

[0104] The aforementioned second control command parameters may include the position command parameters, movement speed command parameters, movement direction command parameters, and action time command parameters included in the first control command parameters in the foregoing embodiments. The difference is that the first control command parameters are for controlling the power control rod, while the second control command parameters are for controlling the temperature control rod. For a detailed description of the second control command parameters, please refer to the foregoing description of the first control command parameters, which will not be repeated here.

[0105] The values ​​of the intermediate control command parameters mentioned above are different under different operating states of the temperature control rod. For example, when the temperature control rod is operating normally, the second control command parameter is not updated, or it can be understood that the updated intermediate control command parameter is the same as the second control command parameter; when the temperature control rod is operating abnormally, the updated intermediate control command parameter is different from the second control command parameter.

[0106] In some embodiments, the acquisition time of the second control command parameter may be the same as the acquisition time of the first control command parameter.

[0107] Considering that the first and second control command parameters may change frequently due to different control requirements, obtaining the latest second control command parameters can improve the accuracy and reliability of the final determination of the target control command parameters.

[0108] In some embodiments, the acquisition time of the second control command parameter may be later than the acquisition time of the first control command parameter. In this way, the latest changing second control command parameter can be obtained, and the accuracy and reliability of the obtained target control command parameter can be improved based on the latest changing second control command parameter.

[0109] The above-mentioned updating of the first control command parameter based on the intermediate control command parameter to obtain the target control command parameter can be achieved by performing different numerical operations on the intermediate control command parameter and the first control command parameter, thereby updating the first control command parameter and obtaining the target control command parameter.

[0110] In some embodiments, updating the first control command parameter based on the intermediate control command parameter to obtain the target control command parameter includes updating the first control command parameter based on the intermediate control command parameter and the second control command parameter.

[0111] In some embodiments, updating the first control command parameter based on the intermediate control command parameter and the second control command parameter can be achieved by multiplying the intermediate control command parameter by the second control command parameter and then adding the result of the multiplication to the first control command parameter.

[0112] In one possible implementation, the second control command parameters are updated based on the operating state of the temperature control rod to obtain intermediate control command parameters for the temperature control rod, including:

[0113] Determine the target control coefficient based on the operating status of the temperature control rod;

[0114] Use the target control coefficient as an intermediate control command parameter;

[0115] The target control coefficient varies depending on the operating state of the temperature control rod.

[0116] The embodiments of this application determine the target control coefficient and use the target control coefficient as an intermediate control command parameter. Unlike the intermediate control command parameters mentioned above, which include various types of command parameters, the target control coefficient is a single coefficient, which simplifies the intermediate control command parameters.

[0117] As mentioned above, the target control coefficient varies depending on the operating state of the temperature control rod, which is similar to the fact that the values ​​of the intermediate control command parameters also differ under different operating states of the temperature control rod. Therefore, this will not be elaborated upon here.

[0118] In one possible implementation, determining the target control coefficient based on the operating state of the temperature control rod includes:

[0119] When the temperature control rod is in the first state, the target control coefficient is determined according to the first control command parameter and the second control command parameter. The first state is used to indicate that the control capability of the temperature control rod is abnormal.

[0120] When the temperature control rod is in the second operating state, the target control coefficient is determined to be zero. The second state is used to indicate that the control capability of the temperature control rod is normal.

[0121] The embodiments of this application determine the target control coefficient by jointly using the first control command parameter and the second command control parameter, which can improve the reliability of the target control coefficient and thus improve the reliability of the finally determined target control command parameter.

[0122] The first state mentioned above can be understood as the working state of the temperature control rod being abnormal, that is, the control capability of the temperature control rod is abnormal or insufficient.

[0123] The second state mentioned above can be understood as the temperature control rod being in normal working condition, that is, the temperature control rod's control capability is normal.

[0124] The above-mentioned determination of the target control coefficient based on the first control command parameter and the second control command parameter can be achieved by performing numerical calculations on the first control command parameter and the second control command parameter to obtain the target control coefficient.

[0125] The target control coefficient is zero, which means that the power control rod can operate according to the original first control command parameters.

[0126] In one possible implementation, determining the target control coefficient based on the first control command parameters and the second control command parameters includes:

[0127] Divide the first control command parameter by the second control command parameter to obtain the target control coefficient.

[0128] The embodiments of this application can accurately determine the aforementioned target control coefficient by setting the first control command parameter to the second control command parameter.

[0129] In some embodiments, the first control command parameter and the second control command parameter can be added together to obtain a first value, and the first control command parameter and the second control command parameter can be multiplied together to obtain a second value. The target control coefficient can be obtained by dividing the first value by the second value, or the target control coefficient can be obtained by dividing the second value by the first value. The specific method used to determine the target control coefficient can be selected according to the actual needs.

[0130] In one possible implementation, after updating the first control command based on the operating state of the temperature control rod to obtain the target control command parameters for the power control rod, the method further includes:

[0131] Input the target control command parameters into the preset function generator to obtain the rod speed information of the power control rod;

[0132] The control power control rods operate according to target control command parameters to regulate the average temperature of the coolant in the nuclear reactor, including:

[0133] The power control rods operate according to the rod speed information to regulate the average temperature of the coolant in the nuclear reactor.

[0134] In this embodiment of the application, by inputting the target control command parameters into a preset function generator, accurate and reliable rod speed information that can be directly used to control the power control rods can be obtained. In this way, the average temperature of the coolant in the nuclear reactor can be quickly adjusted by controlling the movement of the power control rods.

[0135] The aforementioned preset function generator is a device or software module that generates an output signal based on the input and the internally set function relationship. The preset function generator can be set according to actual needs.

[0136] In some embodiments, the preset function generator may include a digital-to-analog converter, a voltage amplifier, and an attenuator.

[0137] The aforementioned digital-to-analog converter can convert target control command parameters into analog electrical signals, specifically analog voltage signals. The aforementioned voltage amplifier can amplify the signal amplitude by setting parameters according to actual needs, while the aforementioned attenuator can be used to adjust the output voltage, thereby outputting corresponding rod speed information. The voltage amplifier and attenuator together enable fine-grained control of the rod speed. The analog voltage signal is linearly related to the rod speed; in other words, different magnitudes of analog voltage signals correspond to different rod speeds.

[0138] In some embodiments, the preset function generator may include a digital-to-analog converter and a main control unit.

[0139] The aforementioned digital-to-analog converter can convert target control command parameters into analog electrical signals, specifically analog voltage signals. The main control unit possesses signal analysis and processing capabilities; for example, it can convert analog voltage signals into frequencies, thereby outputting corresponding rod speed information to achieve precise control of the rod speed. Frequency and rod speed are linearly related; in other words, different high and low frequencies correspond to different rod speeds.

[0140] The above rod speed information refers to the movement speed of the power control rods in the reactor core.

[0141] In some embodiments, the above-mentioned input of target control command parameters into a preset function generator to obtain the rod speed information of the power control rod may be to input the target control command parameters into a preset power control rod speed program, and then process it through the preset function generator to obtain the rod speed information of the power control rod.

[0142] In some embodiments, the target control command parameters may include information such as the position, moving speed, moving direction, and moving time of the power control rod. This information is then processed by a pre-set power control rod speed program and a preset function generator to obtain information such as the power control rod speed, moving direction, and moving time, thereby enabling control of the power control rod and regulating the average temperature of the coolant in the nuclear reactor.

[0143] In one possible implementation, obtaining the operating status of the temperature control rod includes:

[0144] Obtain the position information of the temperature control rods and the average temperature of the coolant in the nuclear reactor;

[0145] The working state of the temperature control rod is determined when the rod position information is outside the first preset threshold range and the average temperature of the coolant in the nuclear reactor is outside the second preset threshold range.

[0146] The first preset threshold range and the second preset threshold range are different threshold ranges.

[0147] The embodiments of this application can determine the working status of the temperature control rod by combining the rod position information and the average temperature of the coolant, thus accurately determining the working status of the temperature control rod.

[0148] In this embodiment, the average coolant temperature and the position information of the temperature control rod can be obtained at the same time.

[0149] The aforementioned first preset threshold range is a numerical range corresponding to the rod position information, which can be represented as (min1, max1), for example (0, 10), where the unit is meters. The first preset threshold range is related to the type and design standards of the nuclear reactor, and is not specifically limited here.

[0150] The aforementioned second preset threshold range is a numerical range corresponding to the average temperature of the coolant, which can be expressed as (min2, max2), for example (250, 320), where the unit is degrees Celsius. The second preset threshold range is also related to the type of nuclear reactor; generally, different types of nuclear reactors correspond to different second preset threshold ranges, which are not specifically limited here.

[0151] If the above rod position information is outside the first preset value range and the average temperature of the coolant in the nuclear reactor is outside the second preset threshold range, it can indicate that the control capability of the temperature control rod is abnormal or insufficient.

[0152] In one possible implementation, before determining the operating state of the temperature control rod when the rod position information is outside a first preset threshold range and the average coolant temperature is outside a second preset threshold range, the method further includes:

[0153] Acquire target monitoring information, including the operating status of temperature control rods and / or the operating status of the nuclear reactor;

[0154] When the rod position information is outside the first preset threshold range and the average coolant temperature is outside the second preset threshold range, the operating state of the temperature control rod is determined, including:

[0155] If the rod position information is outside the first preset threshold range, the average coolant temperature is outside the second preset threshold range, and the target monitoring information meets the preset conditions, the working state of the temperature control rod is determined to be the first state. The first state is used to indicate that the control capability of the temperature control rod is abnormal.

[0156] If the rod position information is outside the first preset threshold range, the average coolant temperature is outside the second preset threshold range, and the target monitoring information does not meet the preset conditions, the working state of the temperature control rod is determined to be the second state. The second state is used to indicate that the control capability of the temperature control rod is normal.

[0157] In some embodiments, the above-mentioned preset conditions include:

[0158] The temperature control rod is operating abnormally; and / or,

[0159] The nuclear reactor is operating normally.

[0160] This application embodiment, by acquiring the operating status of the temperature control rod and / or the operating status of the nuclear reactor, and combining it with the rod position information and average coolant temperature acquired in the aforementioned embodiments, can further improve the accuracy and reliability of determining the operating status of the temperature control rod.

[0161] The operating status of the aforementioned temperature control rods can be determined by the relevant maintenance personnel of the nuclear reactor. If a sticking or unusable temperature control rod is found, the relevant maintenance personnel can manually trigger the information to determine the operating status of the temperature control rod.

[0162] It should be noted that the operating status of the temperature control rod is determined by the relevant operation and maintenance personnel of the nuclear reactor, while in the aforementioned embodiment, the operating status of the temperature control rod can be determined by the rod position information and the average temperature of the coolant.

[0163] The operating status of the aforementioned nuclear reactor can be determined by the corresponding control system of the nuclear reactor or by relevant operation and maintenance personnel. An abnormal operating status of the nuclear reactor indicates that it needs to be shut down, while a normal operating status indicates that it does not need to be shut down.

[0164] When the target monitoring information only includes the operating status of the temperature control rod, determining the operating status of the temperature control rod when the rod position information is outside the first preset threshold range and the average coolant temperature is outside the second preset threshold range may include:

[0165] If the rod position information is outside the first preset threshold range, the average coolant temperature is outside the second preset threshold range, and the operating state of the temperature control rod is abnormal, the operating state of the temperature control rod is determined to be the first state.

[0166] When the target monitoring information only includes the operating status of the nuclear reactor, determining the operating status of the temperature control rod when the rod position information is outside the first preset threshold range and the average coolant temperature is outside the second preset threshold range may include:

[0167] When the rod position information is outside the first preset threshold range, the average coolant temperature is outside the second preset threshold range, and the nuclear reactor is operating normally, the working state of the temperature control rod is determined to be the first state.

[0168] When the target monitoring information includes the operating status of the temperature control rod and the operating status of the nuclear reactor, determining the operating status of the temperature control rod when the rod position information is outside the first preset threshold range and the average coolant temperature is outside the second preset threshold range may include:

[0169] If the rod position information is outside the first preset threshold range, the average coolant temperature is outside the second preset threshold range, the operating status of the temperature control rod is abnormal, and the operating status of the nuclear reactor is normal, the operating status of the temperature control rod is determined to be the first state.

[0170] In some embodiments, after step 130 of the above embodiments, that is, after controlling the power control rods to operate according to the target control command parameters to regulate the average temperature of the coolant in the nuclear reactor, the method may further include:

[0171] If it is detected that the control power control rod runs for a preset time according to the target control command parameters, the above steps 110 to 130 can be repeated until the average temperature of the coolant is within the range of the second preset threshold.

[0172] The preset duration can be selected according to actual needs. In some embodiments, the preset duration is 2 minutes.

[0173] In some embodiments, if the nuclear reactor includes a steam turbine, electronic equipment can acquire the turbine load and input it to a preset function generator, which can output the average coolant temperature. In this embodiment, the preset function generator is load-related and can be set based on actual needs.

[0174] To clearly illustrate the detailed process of the above embodiments, a specific embodiment will be used for explanation below:

[0175] Please see Figure 2 , Figure 2 This is a schematic diagram illustrating the control function triggering of a method for controlling the average temperature of coolant in a nuclear reactor, provided in an embodiment of this application.

[0176] exist Figure 2 middle:

[0177] When the position of the temperature control rod is greater than or equal to max1 (corresponding to the above rod position information being outside the first preset threshold range), the calculated temperature control rod position at the top of the stack signal is 1: temperature control rod position ≥ top of the stack position.

[0178] When the position of the temperature control rod is less than or equal to min1 (corresponding to the above position information being outside the first preset threshold range), the calculated position of the temperature control rod is at the insertion limit signal of 1: temperature control rod position ≤ insertion limit value.

[0179] The temperature control rod position is located at the top of the stack, and the temperature control rod position is located at the insertion limit signal OR gate (corresponding to) Figure 2 If the value is ≥1), a temperature control rod position limitation signal is generated.

[0180] The processed turbine load signal enters the function generator (corresponding to the preset function generator mentioned above), and generates a corresponding average coolant temperature signal according to the different turbine load values.

[0181] When the value of the coolant average temperature signal is less than or equal to min2 (corresponding to the coolant average temperature in the above nuclear reactor being outside the second preset threshold range), the calculated coolant average temperature is below the limit signal as 1: coolant average temperature ≤ coolant average temperature limit.

[0182] The signal indicating that the temperature control rod is in a limited position, the signal indicating that the average coolant temperature is below the limit, and the manual trigger signal when needed, such as when the temperature control rod is stuck or unavailable, are taken by an AND gate (corresponding to the above-mentioned information that maintenance personnel can manually trigger to determine the operating status of the temperature control rod) to generate a flexible control trigger signal.

[0183] The above-mentioned flexible control trigger signal and the no-shutdown signal (corresponding to the normal operating state of the above-mentioned nuclear reactor) are ANDed together to generate the flexible control activation signal.

[0184] Please see Figure 3 , Figure 3 This is a schematic diagram of the control functions included in a method for controlling the average temperature of coolant in a nuclear reactor, provided in an embodiment of this application.

[0185] exist Figure 3 middle:

[0186] Divide the power control rod control command (corresponding to the first control command parameter above) by the temperature control rod control command (corresponding to the second control command parameter above) to generate a flexible control coefficient signal (corresponding to the target control coefficient above): Flexible control coefficient = power control rod control command / temperature control rod control command.

[0187] By using the flexible control activation signal as a logic signal, the flexible control effective coefficient signal is triggered to select between the aforementioned flexible control coefficient signal and the value 0: when the flexible control activation signal is 1, the flexible control coefficient signal is selected (corresponding to the determination of the target control coefficient based on the first control command parameters and the second command control parameters when the temperature control rod is in the first working state); otherwise, the value 0 is selected (corresponding to the determination of the target control coefficient as zero when the temperature control rod is in the second working state). This process can be implemented using a signal selector.

[0188] The temperature control rod control signal under flexible control is generated by multiplying the flexible control effective coefficient signal by the temperature control rod control command:

[0189] The temperature control rod control signal under flexible control = temperature control rod control command × flexible control effectiveness coefficient (corresponding to the above multiplication of the intermediate control command parameter by the second control command parameter).

[0190] By combining the temperature control rod control signal under flexible control with the power control rod control command, a power control rod control signal under flexible control is generated:

[0191] The power control rod control signal under flexible control = the temperature control rod control signal under flexible control + the power control rod control command (corresponding to the above multiplication of the intermediate control command parameter by the second control command parameter, and then adding the result of the multiplication to the first control command parameter to update the first control command parameter).

[0192] The power control rod control command under flexible control is entered into the power control rod speed program, and the power control rod speed signal under flexible control (corresponding to the above-mentioned rod speed information) is generated through the function generator.

[0193] The power control rod speed signal under the above flexible control is used to control the power control rod, so as to realize the flexible control of the reactor power and the average temperature of the coolant in the nuclear power plant (corresponding to the above control power control rod operating according to the target control command parameters to regulate the average temperature of the coolant in the nuclear reactor).

[0194] Corresponding to the above method embodiments, this application also provides an apparatus for controlling the average temperature of the coolant in a nuclear reactor. Please refer to [link to relevant documentation]. Figure 4 , Figure 4A functional module diagram of a device for controlling the average temperature of coolant in a nuclear reactor, provided for an embodiment of this application, wherein the device 400 for controlling the average temperature of coolant in a nuclear reactor includes:

[0195] The acquisition module 410 is used to acquire the working status of the temperature control rod and the first control command parameters of the power control rod. The working status is used to characterize whether the control capability of the temperature control rod is normal.

[0196] The update module 420 is used to update the first control command parameters based on the working state of the temperature control rod to obtain the target control command parameters of the power control rod.

[0197] The control module 430 is used to control the power control rods to operate according to the target control command parameters in order to regulate the average temperature of the coolant in the nuclear reactor.

[0198] The apparatus for controlling the average temperature of the coolant in a nuclear reactor provided in this application embodiment can achieve, for example: Figure 1 The various processes implemented in the Chinese method embodiments can achieve similar or the same technical effects, and will not be described again here to avoid repetition.

[0199] In one possible implementation, the device 400 for controlling the average temperature of the coolant in the nuclear reactor further includes a first processing module for:

[0200] Obtain the second control command parameters for the temperature control rod;

[0201] Update module 420 is also specifically used for:

[0202] The second control command parameters are updated based on the working state of the temperature control rod to obtain the intermediate control command parameters of the temperature control rod.

[0203] The first control command parameters are updated based on the intermediate control command parameters to obtain the target control command parameters.

[0204] In one possible implementation, the update module 420 includes an update submodule, which is used for:

[0205] Determine the target control coefficient based on the operating status of the temperature control rod;

[0206] Use the target control coefficient as an intermediate control command parameter;

[0207] The target control coefficient varies depending on the operating state of the temperature control rod.

[0208] In one possible implementation, the above-mentioned update submodule is further specifically used for:

[0209] When the temperature control rod is in the first state, the target control coefficient is determined according to the first control command parameter and the second control command parameter. The first state is used to indicate that the control capability of the temperature control rod is abnormal.

[0210] When the temperature control rod is in the second operating state, the target control coefficient is determined to be zero. The second state is used to indicate that the control capability of the temperature control rod is normal.

[0211] In one possible implementation, the above-described update submodule further includes an update unit, which is used for:

[0212] Divide the first control command parameter by the second control command parameter to obtain the target control coefficient.

[0213] In one possible implementation, the device 400 for controlling the average temperature of the coolant in the nuclear reactor further includes a second processing module for:

[0214] Input the target control command parameters into the preset function generator to obtain the rod speed information of the power control rod;

[0215] The control module 430 is also specifically used for:

[0216] The power control rods operate according to the rod speed information to regulate the average temperature of the coolant in the nuclear reactor.

[0217] In one possible implementation, the acquisition module 410 is further specifically used for:

[0218] Obtain the position information of the temperature control rods and the average temperature of the coolant in the nuclear reactor;

[0219] The working state of the temperature control rod is determined when the rod position information is outside the first preset threshold range and the average temperature of the coolant in the nuclear reactor is outside the second preset threshold range.

[0220] The first preset threshold range and the second preset threshold range are different threshold ranges.

[0221] In one possible implementation, the acquisition module 410 is further specifically used for:

[0222] Acquire target monitoring information, including the working status of temperature control rods and / or the operating status of the nuclear reactor;

[0223] If the rod position information is outside the first preset threshold range, the average coolant temperature is outside the second preset threshold range, and the target monitoring information meets the preset conditions, the working state of the temperature control rod is determined to be the first state. The first state is used to indicate that the control capability of the temperature control rod is abnormal.

[0224] If the rod position information is outside the first preset threshold range, the average coolant temperature is outside the second preset threshold range, and the target monitoring information does not meet the preset conditions, the working state of the temperature control rod is determined to be the second state. The second state is used to indicate that the control capability of the temperature control rod is normal.

[0225] In some embodiments, the above-mentioned preset conditions include:

[0226] The temperature control rod is in an abnormal operating state; and / or,

[0227] The nuclear reactor is in an abnormal operating state.

[0228] This application also provides an electronic device. Please refer to [link to previous application]. Figure 5 , Figure 5 This is a diagram illustrating the internal structure of an electronic device according to an embodiment of this application. The electronic device includes a processor, a memory, and a network interface connected via a system bus. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and may also store a computer program. When executed by the processor, this computer program enables the processor to implement the method for controlling the average temperature of the coolant in a nuclear reactor, as described in the above embodiment. The internal memory may also store a computer program, which, when executed by the processor, enables the processor to implement the method for controlling the average temperature of the coolant in a nuclear reactor. Those skilled in the art will understand that… Figure 5 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 electronic device to which the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0229] This application also discloses a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the method for controlling the average temperature of the coolant in a nuclear reactor as described in the method embodiments.

[0230] This application provides a computer program product stored in a storage medium. The program product is executed by at least one processor to implement various processes of the embodiments of the method for controlling the average temperature of coolant in a nuclear reactor as described above, and can achieve similar or the same technical effects. To avoid repetition, it will not be described again here.

[0231] 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. This 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, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0232] 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 specification.

Claims

1. A method for controlling the average temperature of coolant in a nuclear reactor, characterized in that, Applied to a nuclear reactor including temperature control rods and power control rods, the method includes: The working status of the temperature control rod and the first control command parameters of the power control rod are obtained. The working status is used to characterize whether the control capability of the temperature control rod is normal. The first control command parameters are updated based on the working state of the temperature control rod to obtain the target control command parameters of the power control rod. The power control rod is controlled to operate according to the target control command parameters in order to regulate the average temperature of the coolant in the nuclear reactor.

2. The method as described in claim 1, characterized in that, Before updating the first control command parameters based on the operating state of the temperature control rod to obtain the target control command parameters of the power control rod, the method further includes: Obtain the second control command parameters of the temperature control rod; The step of updating the first control command parameters based on the operating state of the temperature control rod to obtain the target control command parameters of the power control rod includes: The second control command parameters are updated based on the working state of the temperature control rod to obtain the intermediate control command parameters of the temperature control rod. The first control command parameters are updated based on the intermediate control command parameters to obtain the target control command parameters.

3. The method as described in claim 2, characterized in that, The step of updating the second control command parameters based on the operating state of the temperature control rod to obtain intermediate control command parameters for the temperature control rod includes: Determine the target control coefficient based on the operating state of the temperature control rod; The target control coefficient is used as the intermediate control command parameter; The target control coefficient varies depending on the operating state of the temperature control rod.

4. The method as described in claim 3, characterized in that, The step of determining the target control coefficient based on the operating state of the temperature control rod includes: When the temperature control rod is in the first state, the target control coefficient is determined according to the first control command parameter and the second control command parameter. The first state is used to indicate that the control capability of the temperature control rod is abnormal. When the temperature control rod is in the second operating state, the target control coefficient is determined to be zero. The second state is used to indicate that the control capability of the temperature control rod is normal.

5. The method as described in claim 4, characterized in that, Determining the target control coefficient based on the first control command parameters and the second control command parameters includes: The target control coefficient is obtained by dividing the first control command parameter by the second control command parameter.

6. The method as described in claim 1, characterized in that, After updating the first control command based on the operating state of the temperature control rod to obtain the target control command parameters of the power control rod, the method further includes: The target control command parameters are input into the preset function generator to obtain the rod speed information of the power control rod; The control of the power control rod to operate according to the target control command parameters to regulate the average temperature of the coolant in the nuclear reactor includes: The power control rods are controlled to operate according to the rod speed information in order to regulate the average temperature of the coolant in the nuclear reactor.

7. The method as described in claim 1, characterized in that, The step of obtaining the working status of the temperature control rod includes: Obtain the position information of the temperature control rod and the average temperature of the coolant in the nuclear reactor; When the rod position information is outside the first preset threshold range and the average temperature of the coolant in the nuclear reactor is outside the second preset threshold range, the working state of the temperature control rod is determined. Wherein, the first preset threshold range and the second preset threshold range are different threshold ranges.

8. The method as described in claim 7, characterized in that, Before determining the operating state of the temperature control rod when the rod position information is outside the first preset threshold range and the average coolant temperature is outside the second preset threshold range, the method further includes: Acquire target monitoring information, which includes the operating status of the temperature control rod and / or the operating status of the nuclear reactor; Determining the operating state of the temperature control rod when the rod position information is outside a first preset threshold range and the average coolant temperature is outside a second preset threshold range includes: If the rod position information is outside the first preset threshold range, the average coolant temperature is outside the second preset threshold range, and the target monitoring information meets the preset conditions, the working state of the temperature control rod is determined to be the first state, and the first state is used to indicate that the control capability of the temperature control rod is abnormal. If the rod position information is outside the first preset threshold range, the average coolant temperature is outside the second preset threshold range, and the target monitoring information does not meet the preset conditions, the working state of the temperature control rod is determined to be the second state, which indicates that the control capability of the temperature control rod is normal.

9. The method as described in claim 8, characterized in that, The preset conditions include: The operating status of the temperature control rod is abnormal; and / or, The nuclear reactor is operating normally.

10. A device for controlling the average temperature of coolant in a nuclear reactor, characterized in that, An apparatus applicable to a nuclear reactor including temperature control rods and power control rods, the apparatus comprising: The acquisition module is used to acquire the working status of the temperature control rod and the first control command parameters of the power control rod, wherein the working status is used to characterize whether the control capability of the temperature control rod is normal. The update module is used to update the first control command parameters based on the working state of the temperature control rod to obtain the target control command parameters of the power control rod. The control module is used to control the power control rod to operate according to the target control command parameters in order to regulate the average temperature of the coolant in the nuclear reactor.

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