Control unit, control method and reactor core neutron fluence rate measurement system

Abstract

The embodiment of the invention discloses a control unit, a control method and a reactor core neutron fluence rate measurement system, and relates to the technical field of computers. The industrial personal computer is used for sending a control instruction to the measurement and control case; the measurement and control case is used for moving a probe of a neutron detector corresponding to the measurement and control case in response to the control instruction; acquiring the position of the moved probe, the state of a neutron flux measurement channel and neutron fluence rate data; the position of the moved probe, the state of the neutron flux measurement channel and neutron fluence rate data are sent to an industrial personal computer; and the industrial personal computer is also used for displaying the position of the moved probe, the state of the neutron flux measurement channel and neutron fluence rate data. Therefore, an operator can directly see the position of the moved probe, the state of the neutron flux measurement channel and neutron fluence rate data through the display interface of the industrial personal computer, and does not need to depend on an external tool for monitoring and debugging, so that the complexity of operation is greatly reduced, the possibility of errors is reduced, and the working efficiency and accuracy are improved.

Description

Technical Field

[0001] This application relates to the field of computer technology, and in particular to a control unit, a control method, and a core neutron flux measurement system. Background Technology

[0002] The reactor core neutron flux measurement system is a crucial component of a nuclear power plant. It is responsible not only for receiving and transmitting operational commands from the neutron probes, but also for reading and uploading the neutron flux data measured by the probes. This neutron flux data is of paramount importance for the safe operation, power control, and accident prevention of the nuclear power plant.

[0003] In related technologies, the control unit of the reactor core neutron fluence measurement system often adopts an operation panel with indicator lights. While this design can meet basic functional requirements, it lacks an intuitive visual interface. This means that operators need to rely on external tools (such as multimeters and oscilloscopes) to monitor and adjust the reactor core neutron fluence data, increasing the complexity and error rate of operation. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a control unit, a control method, and a core neutron flux measurement system, which reduces operational complexity, minimizes the possibility of errors, and improves work efficiency and accuracy.

[0005] The embodiments of this application disclose the following technical solutions:

[0006] In a first aspect, this application discloses a control unit, which includes: an industrial computer and a measurement and control chassis;

[0007] The industrial control computer is used to send control commands to the measurement and control chassis, the control commands including position information for moving the probe of the neutron detector corresponding to the measurement and control chassis;

[0008] The measurement and control chassis is used to, in response to the control command, move the probe of the neutron detector corresponding to the measurement and control chassis; acquire the probe position after movement, the status of the neutron flux measurement channel, and the neutron fluence rate data; and send the probe position after movement, the status of the neutron flux measurement channel, and the neutron fluence rate data to the industrial control computer.

[0009] The industrial control computer is also used to display the position of the moved probe, the status of the neutron flux measurement channel, and the neutron flux rate data.

[0010] Optionally, the measurement and control chassis is specifically used to obtain the position of the probe after it has moved by reading the synchronous encoder or the resolver sensor.

[0011] Optionally, the monitoring and control chassis includes an alarm device, which includes at least one of a buzzer, an indicator light, and an alarm light;

[0012] The alarm device is used to issue an alarm indication when any of the following conditions are met: the neutron flux rate data is higher than a first preset threshold, the neutron flux rate data is lower than a second preset threshold, the neutron flux measurement channel is in an abnormal state, and the control and measurement chassis is not connected to the synchronous encoder or the control and measurement chassis is not connected to the resolver sensor.

[0013] Optionally, the control command includes an execution storage mode command; specifically, the control and measurement chassis is used to move the probe of the neutron detector corresponding to the control and measurement chassis to the target storage location in response to the execution storage mode command.

[0014] Optionally, the control unit includes multiple measurement and control cabinets, each of which corresponds to one or more route selection channels; the control commands include a normal mode execution command, wherein the normal mode command indicates a unique route selection channel;

[0015] The control and measurement chassis is specifically used to move the probe of the neutron detector to the path selection channel indicated by the normal mode execution command in response to the normal mode execution command.

[0016] Optionally, the control unit includes multiple measurement and control cabinets, each of which corresponds to one or more route selection channels; the control commands include an emergency mode execution command.

[0017] The control and measurement chassis is specifically used to move the probe of the neutron detector to the next routing channel of the current routing channel in response to the emergency mode command.

[0018] Optionally, the control and measurement chassis is specifically used to: if the control and measurement chassis is in self-test mode, detect the electromechanical equipment inside the control and measurement chassis; if the detection result indicates that the electromechanical equipment is in a connected state, then in response to the control command, move the probe of the neutron detector corresponding to the control and measurement chassis.

[0019] Secondly, this application provides a control method applied to a control unit, the control unit including an industrial computer and a measurement and control chassis, the method comprising:

[0020] The industrial control computer sends a control command to the measurement and control chassis, so that the measurement and control chassis responds to the control command and moves the probe of the neutron detector corresponding to the measurement and control chassis. The control command includes position information for moving the probe of the neutron detector corresponding to the measurement and control chassis.

[0021] The industrial control computer obtains the probe position after movement, the status of the neutron flux measurement channel, and the neutron flux rate data from the measurement and control chassis.

[0022] The industrial control computer displays the position of the moved probe, the status of the neutron flux measurement channel, and the neutron flux rate data.

[0023] Optionally, the position of the probe after movement is read by the measurement and control chassis from the synchronous encoder or the resolver sensor.

[0024] Thirdly, this application discloses a core neutron flux measurement system, which includes the control unit described in the first aspect.

[0025] Compared with the prior art, this application has the following beneficial effects:

[0026] This application provides a control unit, a control method, and a reactor core neutron flux rate measurement system. The control unit includes an industrial computer and a control and measurement chassis. The industrial computer sends control commands to the control and measurement chassis. The control and measurement chassis, in response to the control commands, moves the probe of the corresponding neutron detector; acquires the moved probe position, the status of the neutron flux measurement channel, and neutron flux rate data; and sends the moved probe position, the status of the neutron flux measurement channel, and the neutron flux rate data back to the industrial computer. The industrial computer also displays the moved probe position, the status of the neutron flux measurement channel, and the neutron flux rate data. Therefore, operators can directly see the moved probe position, the status of the neutron flux measurement channel, and the neutron flux rate data through the industrial computer's display interface, eliminating the need for external tools for monitoring and debugging. This significantly reduces operational complexity, minimizes the possibility of errors, and improves work efficiency and accuracy. Attached Figure Description

[0027] 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. Obviously, 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.

[0028] Figure 1 A signaling diagram of a control unit provided in an embodiment of this application;

[0029] Figure 2 A schematic diagram of a control unit provided in an embodiment of this application;

[0030] Figure 3 A schematic diagram of a measurement and control chassis provided in an embodiment of this application;

[0031] Figure 4 A schematic diagram of a host computer software architecture provided for an embodiment of this application;

[0032] Figure 5 A schematic diagram illustrating the functions of a host computer software provided in an embodiment of this application;

[0033] Figure 6 A schematic diagram illustrating a probe execution mode provided in an embodiment of this application;

[0034] Figure 7 A flowchart of a control method provided in an embodiment of this application. Detailed Implementation

[0035] First, let's explain the technical terms used in the embodiments of this application:

[0036] The reactor core is the heart of a nuclear power plant reactor, the core component where nuclear fuel undergoes fission and releases energy. Within the core, nuclear fuel assemblies are arranged in a specific pattern, and a self-sustaining chain nuclear reaction takes place in this region, converting nuclear energy into thermal energy and creating conditions for nuclear energy utilization.

[0037] Neutron flux, or neutron density, describes the number of neutrons passing through a unit area per unit time; its unit is n / (cm²·s). Neutron flux reflects the density and velocity of neutrons at a point in space and is an important indicator for assessing neutron radiation intensity, reactor power distribution, and nuclear fuel burnup.

[0038] As described earlier, most current reactor core neutron fluence measurement systems use an operation panel with indicator lights as the control unit. While this design meets basic functional requirements, it lacks an intuitive visual interface. This means that operators must rely on external tools (such as multimeters and oscilloscopes) to monitor and adjust the reactor core neutron fluence data, increasing operational complexity and error rates.

[0039] Through research, the inventors proposed a control unit, a control method, and a core neutron flux rate measurement system. The control unit includes an industrial computer and a control and measurement control chassis. The industrial computer sends control commands to the control and measurement control chassis. In response to the control commands, the control and measurement chassis moves the probe of its corresponding neutron detector, acquires the moved probe position, the status of the neutron flux measurement channel, and neutron flux rate data, and sends these data back to the industrial computer. The industrial computer also displays these data. Therefore, operators can directly view the moved probe position, the status of the neutron flux measurement channel, and the neutron flux rate data through the industrial computer's display interface, eliminating the need for external tools for monitoring and debugging. This significantly reduces operational complexity, minimizes the possibility of errors, and improves work efficiency and accuracy.

[0040] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0041] See Figure 1 This figure is a signaling diagram of a control unit provided in an embodiment of this application. The control unit 10 includes an industrial computer 11 and a measurement and control chassis 12.

[0042] S101: The industrial computer 11 sends control commands to the measurement and control box 12.

[0043] The industrial control computer 11, acting as the control center of the control unit 10, is responsible for sending specific control commands to the measurement and control chassis 12. These control commands include position information for moving the probe of the neutron detector corresponding to the measurement and control chassis 12. This position information is typically represented in digital or coded form and transmitted between the industrial control computer and the measurement and control chassis via a communication protocol.

[0044] In some specific implementations, a USB / RS232 conversion module can be installed between the industrial computer 11 and the measurement and control chassis 12. This USB / RS232 conversion module can convert signals from the USB interface to the RS232 interface, thereby achieving interface matching between the industrial computer 11 and the measurement and control chassis 12. This means that the measurement and control chassis 12 can transmit the collected data (such as probe position, neutron flux measurement channel status, neutron flux rate data, etc.) to the USB / RS232 conversion module in real time via the RS232 communication protocol, and then transmit it to the industrial computer 11 via the USB interface. Similarly, the industrial computer 11 can also send control commands to the USB / RS232 conversion module via the USB interface, which then converts them into RS232 signals and sends them to the measurement and control chassis 12.

[0045] Therefore, due to the fast transmission speed and low latency of the RS232 communication protocol, real-time data transmission and real-time control command issuance can be ensured. This is crucial for neutron fluence measurement systems that require high precision and efficiency. Furthermore, in the presence of multiple measurement and control cabinets 12, this centralized control allows the industrial computer 11 to send commands to multiple measurement and control cabinets 12 simultaneously, thereby achieving parallel processing, significantly shortening the measurement cycle, and improving measurement efficiency.

[0046] S102: The control and measurement chassis 12 responds to the control command and moves the probe of the neutron detector corresponding to the control and measurement chassis.

[0047] The control and measurement equipment is one of the key devices in the reactor core neutron flux measurement system used to process the neutron flux data. They are powered by a 110-220V DC power supply to ensure stable and reliable operation.

[0048] After receiving a control command from the industrial computer 11, the control and measurement chassis 12 moves the neutron detector probe to the position specified by the control command. Specifically, the control and measurement chassis 12 includes electromechanical equipment such as stepper motors and servo motors, which are connected to the neutron detector probe via mechanical transmission devices. When the control and measurement chassis 12 receives a control command to move the probe, the electromechanical equipment in the control and measurement chassis 12 controls the movement of the mechanical transmission devices to achieve precise movement of the probe. It is understood that the probe movement process typically involves multiple stages, including acceleration, constant speed, and deceleration, to ensure that the probe can smoothly and accurately reach the position specified by the control command.

[0049] It should be noted that the measurement and control chassis can also be equipped with position sensors or encoders to acquire position data, which are used to monitor the current position of the probe in real time and compare it with the position specified by the control command, so as to adjust the motion state of the electromechanical equipment and ensure the accuracy of the probe movement.

[0050] S103: The measurement and control chassis 12 acquires the probe position after movement, the status of the neutron flux measurement channel, and the neutron flux rate data.

[0051] After the probe moves, the control and measurement unit 12 first acquires the probe's new position, i.e., the probe's actual position. This is typically achieved by reading the synchronous encoder or resolver sensor associated with the probe's position. The synchronous encoder or resolver sensor can accurately measure the probe's new position and convert this position information into a digital signal for processing by the control and measurement unit 12.

[0052] The control and measurement enclosure 12 also monitors the status of the neutron flux measurement channels and the neutron fluence data. The neutron flux measurement channels are a crucial part of the neutron detector used to detect neutron flux, and their status directly affects the accuracy and reliability of the neutron fluence data. Neutron fluence data is also one of the key parameters that the neutron detector needs to measure, reflecting the intensity and distribution of the neutron field. The control and measurement enclosure 12 periodically checks the operating status of these channels, including whether there are blockages, leaks, or other abnormalities. Through status monitoring, the control and measurement enclosure 12 can promptly detect and address potential problems, ensuring the accuracy of the neutron fluence data.

[0053] It should be noted that the control and measurement chassis 12 can also integrate alarm devices (such as buzzers, indicator lights and alarm lights) to ensure that alarm instructions can be issued in a timely manner under specific conditions. This design is crucial for ensuring the safety of the control unit, preventing potential dangers and responding quickly to faults.

[0054] In one example, the alarm condition could be: when the neutron injection rate data exceeds a set safety limit (i.e., a first preset threshold), an alarm indication is immediately issued. This means that the control unit 10 is in a high-risk state and immediate measures are needed to prevent potential accidents or damage.

[0055] In another example, the alarm condition could be: an alarm is immediately issued when the neutron fluence data falls below a set second preset threshold. Although a low neutron fluence rate does not usually pose a direct safety threat, it may indicate problems such as performance degradation of the control unit 10, improper probe positioning, or measurement channel malfunction.

[0056] In another example, the alarm condition could also be: when the state of the neutron flux measurement channel is abnormal, such as when there is a blockage, leakage or other abnormality, an alarm indication is issued immediately.

[0057] In another example, the alarm condition could be: when the control and measurement chassis 12 is disconnected from the synchronous encoder or the resolver sensor, an alarm indication is immediately issued. The synchronous encoder or resolver sensor is a key component of the control and measurement chassis 12 used to monitor and control probe positions or other electromechanical equipment. If their connection to the control and measurement chassis 12 is lost, it will result in the inability to accurately acquire or control relevant parameters, thereby affecting the normal operation and safety of the control unit 10. Therefore, when such a disconnection is detected, the control and measurement chassis 12 can also immediately issue an alarm to prompt the operator to check and restore the connection.

[0058] When any one or more of the above alarm conditions are met, the alarm device of the control and measurement chassis 12 will issue an alarm instruction to remind the operator to pay attention and take corresponding measures to solve the problem.

[0059] S104: The measurement and control chassis 12 sends the probe position after movement, the status of the neutron flux measurement channel, and the neutron flux rate data to the industrial control computer 11.

[0060] The measurement and control chassis 12 transmits the acquired probe position after movement, neutron flux measurement channel status, and neutron flux rate data back to the industrial control computer 11 via a USB / RS232 conversion module, so that the industrial control computer 11 can perform centralized processing and display.

[0061] S105: The industrial control computer 11 displays the probe position after movement, the status of the neutron flux measurement channel, and the neutron flux rate data.

[0062] After receiving the probe position after movement, the status of the neutron flux measurement channel and the neutron flux rate data sent by the measurement and control chassis 12, the industrial control computer 11 will display these data in the form of graphics, charts and numbers on its display interface.

[0063] For example, the display interface of the industrial computer 11 can show the probe's specific location in space through maps, coordinate axes, or other means, helping operators confirm whether the probe has accurately reached the designated location. The display interface of the industrial computer 11 can display the working status of the neutron flux measurement channel, such as normal, abnormal, or fault, through indicator lights, color coding, or text descriptions, so that operators can promptly identify and handle potential problems. The display interface of the industrial computer 11 can display the real-time value and trend of the neutron flux rate through numbers and charts (such as line graphs and bar charts), providing important reference information for operators.

[0064] Therefore, the data sent by the measurement and control chassis 12 is visualized through the display interface of the industrial control computer 11, providing operators with an intuitive and easy-to-use monitoring platform. This step not only reduces the complexity and error rate of operation but also improves the operating efficiency and safety of the entire control unit 10. By displaying information such as probe position, neutron flux measurement channel status, and neutron flux rate data in real time and accurately, operators can more precisely control the experimental process, ensuring the accuracy and reliability of the measurement results.

[0065] In summary, the embodiments of this application provide a control unit that allows operators to directly view the moved probe position, the status of the neutron flux measurement channel, and the neutron flux rate data through the display interface of an industrial control computer, eliminating the need to rely on external tools for monitoring and debugging. This greatly reduces the complexity of operation, decreases the possibility of errors, and improves work efficiency and accuracy.

[0066] See Figure 2 This figure is a schematic diagram of a control unit provided in an embodiment of this application. See also... Figure 3 This figure is a schematic diagram of a measurement and control chassis provided in an embodiment of this application. First, let's combine it with... Figure 2 and Figure 3 The following explanation is provided regarding the measurement and control chassis within the control unit:

[0067] like Figure 2 As shown, the control unit provided in this embodiment integrates three measurement and control cabinets. These three cabinets provide a total of five measurement channels, corresponding to the five paths of the neutron channel measurement path. Specifically, the first measurement and control cabinet measures the first and fourth channels (i.e., FLUX1 and FLUX4), the second measurement and control cabinet measures the second and fifth channels (i.e., FLUX2 and FLUX5), and the third measurement and control cabinet measures the third channel (i.e., FLUX3). It should be noted that the reason for providing five measurement channels is that there are a total of five neutron channel measurement paths, and each measurement and control cabinet is responsible for measuring a portion of the channels, ensuring comprehensive coverage of the monitoring of the neutron flux rate in the reactor core.

[0068] Each control and measurement unit can connect to one I / O unit via an RS422 interface. The I / O unit is used to control electromechanical equipment such as drive units, selectors, and electric valves. Specifically, the electromechanical equipment and the control and measurement unit can interact via control signal output (ETOR) signals and measurement signal input (STOR) signals. STOR signals can include operations such as start, stop, and parameter adjustment to control the operating status of the electromechanical equipment. ETOR signals can include real-time data of physical quantities such as temperature, pressure, and flow rate, as well as the on / off status and fault information of the electromechanical equipment.

[0069] Each control and measurement chassis needs to be configured with a different Internet Protocol (IP) address. Only with distinct IP addresses can the industrial control computer differentiate between different chassis, enabling precise data and command transmission and control. It should be noted that the IP address of the control and measurement chassis is defined by an external connection, such as an Ethernet interface (not shown in the diagram) provided by each chassis. This interface is used to configure basic operating parameters of the control and measurement chassis, such as the IP address and communication protocol.

[0070] It should be noted that each control and measurement unit (CTMU) has three main functions: First, it manages the neutron flux measurement probe, acquiring the probe's position after movement, the status of the neutron flux measurement channel, and neutron fluence data. Second, it communicates with an industrial computer, transmitting the aforementioned data for further analysis and control. Third, it can perform basic actions, such as triggering alarms or executing safe reactor shutdown operations based on neutron fluence data.

[0071] It should be noted that a USB / RS232 conversion module can be installed between the industrial control computer and the measurement and control cabinet. This module provides one USB interface and four RS232 interfaces; three of these connect to the three measurement and control cabinets respectively, and the remaining one connects to a Distributed Control System (DSC). The DSC system controls and monitors the entire industrial process through multiple distributed control units and distributed input / output devices. It receives data from the measurement and control cabinets and performs comprehensive analysis to achieve comprehensive control of nuclear power plants or other industrial processes.

[0072] See Figure 4 This figure is a schematic diagram of a host computer software architecture provided in an embodiment of this application. Next, in conjunction with... Figure 2 and Figure 4 The industrial control computer in the control unit will be explained:

[0073] The industrial control computer integrates host computer software. Upon startup, the host computer software first performs a self-check to ensure that the software itself and the three measurement and control chassis are in normal working order. Afterward, the user can log in to the host computer software and access the operation interface.

[0074] In some specific implementations, the host computer software can receive the latest data from the measurement and control chassis at preset intervals, including the probe position, the status of the neutron flux measurement channel, and the neutron flux rate data, and update this information in real time on the display interface.

[0075] Furthermore, after each data update, the host computer software saves the updated data to the log for subsequent analysis or troubleshooting. Additionally, if data anomalies are detected (such as a sudden increase or decrease in neutron flux, neutron flux data exceeding a first preset threshold or falling below a second preset threshold), the host computer software will issue an alarm on the display interface to alert the operator.

[0076] It should be noted that after the core neutron flux measurement system is started, the host computer software of the industrial control computer can also receive reactor operating status data (such as temperature, pressure, flow rate, neutron flux, etc.) from other control units of the DCS system through the Modbus RTU protocol of the RS485 interface, and save the above data to the database of the host computer software through the custom protocol of the RS232 interface.

[0077] See Figure 5 This figure is a schematic diagram of the functions of a host computer software provided in an embodiment of this application. Figure 5 It can be seen that the host computer software has data communication functions, namely the communication functions with the DCS system and control chassis mentioned above.

[0078] The host computer software also has a data display function, which displays the probe position after movement, the status of the neutron flux measurement channel, and the neutron flux rate data.

[0079] The host computer software also has a data storage function, which stores the probe position after movement, the status of the neutron flux measurement channel, and the neutron flux rate data.

[0080] The host computer software also has a report printing function. This function allows users to output the data collected, processed, and analyzed by the control unit in paper form, facilitating archiving, sharing, and further analysis.

[0081] The host computer software also has a logging function. This logging can refer to alarm logs, process logs, or error logs.

[0082] Alarm logs are primarily used to record various alarm events that occur during the operation of the control unit, such as sudden increases or decreases in neutron flux, or neutron flux data exceeding a first preset threshold or falling below a second preset threshold. Alarm logs typically contain detailed information about the alarm event, such as the time of occurrence, alarm type, alarm level, relevant parameter values, and possible cause analysis. This information is crucial for operators because it helps them quickly locate problems, assess risks, and take appropriate countermeasures.

[0083] The process log records the execution status of each process within the control unit. In a core neutron flux measurement system, the process log may record the specific actions of electromechanical equipment within the control and measurement chassis, such as the execution status of probe movement operations. The process log is crucial for monitoring the operational status of the control unit, evaluating its performance, and diagnosing potential problems.

[0084] Error logs are specifically used to record errors in the control unit. In a reactor core neutron flux measurement system, error logs may record failures of electromechanical equipment within the control and measurement enclosure, such as a probe failing to move to the position indicated by a control signal. Error logs typically contain detailed information about the error, such as the error type, time of occurrence, relevant parameter values, and possible causes. This information is crucial for developers and system administrators, as it helps them quickly locate problems, analyze causes, and take appropriate corrective actions. Furthermore, error logs can be used for performance monitoring and optimization. By analyzing the information in the error logs, performance bottlenecks and potential risks in the control unit can be identified, allowing for appropriate optimization measures to improve the stability and reliability of the control unit.

[0085] The host computer software also has parameter configuration functions. In some examples, the host computer software can configure the parameters of the measurement and control chassis, such as the sampling frequency of the chassis (the frequency at which the chassis receives data from the synchronous encoder or resolver sensor), the communication protocol of the chassis, and the alarm threshold of the chassis. In other examples, the host computer software can also configure the parameters of electromechanical equipment, such as the electric valve parameters of the electromechanical equipment (adjusting the opening and closing time, opening and closing force, etc. of the electric valve) and the drive parameters of the electromechanical equipment (configuring the drive unit's drive speed, acceleration, deceleration, etc.). It should be noted that this application does not limit the specific parameters.

[0086] Most importantly, the host computer software also has process control functions. In the control unit disclosed in this application embodiment, there are four probe execution modes, and the probe can be controlled to reach different positions based on different probe execution modes. Specifically, the probe execution modes include Storage, Normal, Emergency, and Reference. See also Figure 6 The figure is a schematic diagram of a probe execution mode provided in an embodiment of this application.

[0087] The execution of the storage mode involves controlling the probe to be moved to the target storage location. This storage location is typically designed for the safe storage of the probe, protecting it from damage or contamination when measurements are not required. The choice of storage location may be based on various factors, such as ease of access and protective capabilities. In other words, the control and measurement unit can respond to the execution of the storage mode command by moving the probe of the corresponding neutron detector to the target storage location.

[0088] Executing normal mode involves controlling and sending the probe to its corresponding path selection channel. This is typically determined according to a preset measurement plan or operating instructions. For example, if the probe is assigned to group selection 1, it will be sent to the path selection channel corresponding to group selection 1 (e.g., path selection 1) for measurement. This mode is the most commonly used in routine measurements, ensuring that the probe can perform measurements according to a predetermined path and sequence. In other words, the control and measurement unit can respond to the normal mode execution command by moving the neutron detector probe to the path selection channel indicated by the normal mode execution command.

[0089] Executing emergency mode involves controlling the probe and sending it to the next appropriate path selection channel. This mode is typically used to handle unexpected or emergency situations when a rapid change in probe position is required for additional measurements or verification. For example, if the probe is currently measuring in path selection 1 corresponding to group selection 1, and the system detects an anomaly or requires additional data support, the probe can be urgently sent to the next path selection channel (such as path selection 2) for further inspection. In other words, the control and measurement unit can respond to an emergency mode command by moving the neutron detector probe to the next path selection channel after the current one.

[0090] Performing reference mode involves controlling the probe and sending it to a target path (e.g., path 4) as a reference position. This position may be chosen based on control unit design requirements or for comparison with a specific reference standard. In core neutron flux measurements, reference positions are typically used to calibrate the probe or verify the accuracy of measurement results. By sending the probe to the reference position for measurement and comparing it with known reference data, the probe's performance and the reliability of the measurement results can be evaluated.

[0091] It is understood that one or more of the above four execution modes can be assembled into basic instruction logic through a communication protocol to obtain control instructions for a Manual Command. After obtaining the execution logic of a Manual Command, the execution logic of multiple Manual Commands can be assembled to obtain control instructions for User Sequences. After obtaining the execution logic of User Sequences, the execution logic of multiple User Sequences can be assembled to obtain control instructions for a Campaign. This application does not limit this aspect.

[0092] It should be noted that after the host computer software sends control commands to the measurement and control chassis, the measurement and control chassis also needs to consider its own channel mode and execute the corresponding actions of the control commands.

[0093] The channel modes include self-test mode, static mode, dynamic mode, plateau mode, automatic ranging mode, movement on specification mode, and leak detection mode.

[0094] The self-test mode automatically checks whether the various electromechanical devices inside the control and measurement chassis are functioning properly, including position sensors, encoders, and mechanical transmission devices. Specifically, if the control and measurement chassis is in self-test mode, it checks the electromechanical devices inside; if the test results indicate that all devices are connected, it responds to control commands by moving the probe of the corresponding neutron detector within the control and measurement chassis. Therefore, through periodic or irregular self-tests, potential faults can be detected and eliminated promptly, ensuring the reliability and long-term stable operation of the control and measurement chassis. This is crucial for maintaining production safety and improving production efficiency.

[0095] Static modes are suitable for situations where the neutron source or neutron field is in a relatively stable state. In this state, the change in neutron flux is very small or almost constant, thus allowing for long-term, precise measurements. Dynamic modes, on the other hand, are suitable for situations where the neutron source or neutron field undergoes significant changes. These changes may be caused by the switching on or off of the neutron source, modulation of the neutron field, or external disturbances (such as mechanical motion, temperature changes, etc.).

[0096] The plateau mode is used after the neutron flux has reached the plateau region to ensure the stability and reliability of the measurement results. Measurements using the plateau mode can accurately obtain neutron flux data of the reactor under stable operating conditions, providing a basis for the safe operation and performance optimization of the reactor.

[0097] The auto-range mode uses built-in algorithms and sensors to monitor changes in neutron flux in real time and automatically selects the range best suited for the current measurement. This avoids the tediousness of manually adjusting the range and measurement errors that may result from improper human judgment.

[0098] Standardized motion modes are used for motion control according to preset specifications or paths. In situations requiring precise control of the movement trajectory of mechanical components (such as probe movement), standardized motion modes ensure that mechanical components move along preset paths and speeds, improving production efficiency and product quality.

[0099] The leak detection mode is used to periodically monitor for leaks in the control unit. This mode can promptly detect and report leaks, helping to prevent environmental pollution and safety accidents.

[0100] In summary, the embodiments of this application provide a control unit that allows operators to directly view the moved probe position, the status of the neutron flux measurement channel, and the neutron flux rate data through the display interface of the industrial control computer. This eliminates the need to rely on external tools for monitoring and debugging, greatly reducing the complexity of operation, minimizing the possibility of errors, and improving work efficiency and accuracy.

[0101] See Figure 7 This figure is a flowchart of a control method provided in an embodiment of this application. The method is applied to a control unit, which includes an industrial computer and a measurement and control chassis. The method includes:

[0102] S701: The industrial control computer sends control commands to the measurement and control chassis, so that the measurement and control chassis responds to the control commands and moves the probe of the neutron detector corresponding to the measurement and control chassis. The control commands include position information for moving the probe of the neutron detector corresponding to the measurement and control chassis.

[0103] In some specific implementations, the position of the probe after movement is read by the control and measurement chassis from the synchronous encoder or resolver sensor.

[0104] S702: The industrial control computer obtains the probe position after movement, the status of the neutron flux measurement channel, and the neutron flux rate data from the measurement and control chassis.

[0105] S703: The industrial control computer displays the probe position after movement, the status of the neutron flux measurement channel, and the neutron flux rate data.

[0106] In summary, the embodiments of this application provide a control method that allows operators to directly view the moved probe position, the status of the neutron flux measurement channel, and the neutron flux rate data through the display interface of the industrial control computer. This eliminates the need to rely on external tools for monitoring and debugging, greatly reducing the complexity of operation, minimizing the possibility of errors, and improving work efficiency and accuracy.

[0107] Accordingly, this application also discloses a core neutron flux measurement system, including a control unit as described in the foregoing embodiments.

[0108] The reactor core neutron flux measurement system provided in this application embodiment has the beneficial effects of the control unit described above.

[0109] It should be noted that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for the device and system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiments. The device and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components indicated as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of the solution in this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0110] The above description is merely one specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A control unit, characterized in that, The control unit includes: an industrial computer and a measurement and control chassis; The industrial control computer is used to send control commands to the measurement and control chassis, the control commands including position information for moving the probe of the neutron detector corresponding to the measurement and control chassis; The measurement and control chassis is used to, in response to the control command, move the probe of the neutron detector corresponding to the measurement and control chassis; acquire the probe position after movement, the status of the neutron flux measurement channel, and the neutron fluence rate data; and send the probe position after movement, the status of the neutron flux measurement channel, and the neutron fluence rate data to the industrial control computer. The industrial control computer is also used to display the position of the moved probe, the status of the neutron flux measurement channel, and the neutron flux rate data.

2. The control unit according to claim 1, characterized in that, The measurement and control chassis is specifically used to obtain the position of the probe after it has moved by reading the synchronous encoder or the resolver sensor.

3. The control unit according to claim 2, characterized in that, The monitoring and control chassis includes an alarm device, which includes at least one of a buzzer, an indicator light, and an alarm light. The alarm device is used to issue an alarm indication when any of the following conditions are met: the neutron flux rate data is higher than a first preset threshold, the neutron flux rate data is lower than a second preset threshold, the neutron flux measurement channel is in an abnormal state, and the control and measurement chassis is not connected to the synchronous encoder or the control and measurement chassis is not connected to the resolver sensor.

4. The control unit according to claim 1, characterized in that, The control commands include an execution storage mode command; specifically, the control and measurement chassis is used to move the probe of the neutron detector corresponding to the control and measurement chassis to the target storage location in response to the execution storage mode command.

5. The control unit according to claim 1, characterized in that, The control unit includes multiple measurement and control cabinets, each of which corresponds to one or more route selection channels; the control commands include a normal mode execution command, which indicates a unique route selection channel. The control and measurement chassis is specifically used to move the probe of the neutron detector to the path selection channel indicated by the normal mode execution command in response to the normal mode execution command.

6. The control unit according to claim 1, characterized in that, The control unit includes multiple measurement and control cabinets, each of which corresponds to one or more route selection channels; the control commands include executing emergency mode commands. The control and measurement chassis is specifically used to move the probe of the neutron detector to the next routing channel of the current routing channel in response to the emergency mode command.

7. The control unit according to claim 1, characterized in that, The measurement and control chassis is specifically used to: if the measurement and control chassis is in self-test mode, detect the electromechanical equipment inside the measurement and control chassis; if the detection result indicates that the electromechanical equipment is in a connected state, then in response to the control command, move the probe of the neutron detector corresponding to the measurement and control chassis.

8. A control method, characterized in that, Applied to a control unit, the control unit including an industrial computer and a measurement and control chassis, the method includes: The industrial control computer sends a control command to the measurement and control chassis, so that the measurement and control chassis responds to the control command and moves the probe of the neutron detector corresponding to the measurement and control chassis. The control command includes position information for moving the probe of the neutron detector corresponding to the measurement and control chassis. The industrial control computer obtains the probe position after movement, the status of the neutron flux measurement channel, and the neutron flux rate data from the measurement and control chassis. The industrial control computer displays the position of the moved probe, the status of the neutron flux measurement channel, and the neutron flux rate data.

9. The method according to claim 8, characterized in that, The position of the probe after the movement is read by the measurement and control chassis from the synchronous encoder or the resolver sensor.

10. A reactor core neutron flux measurement system, characterized in that, The core neutron flux measurement system includes a control unit as described in any one of claims 1-7.

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