Control system and method for unloading and loading of nuclear material production line
By using the control modules of OR, NAND and doors in the nuclear material production line, the time-sharing unloading and loading of the equipment is solved, and the problem of equipment being accidentally started during power switching is ensured, ensuring the stable switching of the power supply and the continuous operation of the production line's safety functions.
Patent Information
- Application Number
- CN202510502675.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2025-07-29
AI Technical Summary
When the nuclear material production line loses its normal power supply, the diesel generator set has high power, resulting in different equipment control loops. The equipment may be started by mistake or cannot start automatically during power switching, causing impact, and it is urgent to switch the control system stably.
The control module including OR, NAND and doors is adopted to block the equipment startup commands through logical operations of time-sharing unloading signals and reloading signals, so as to realize the equipment unloading and loading in batches to avoid the equipment being accidentally started and impacted by the diesel generator set.
It realizes the stable unloading and loading of equipment during power switching of nuclear material production lines, protects the stable operation of diesel generator sets, and ensures the continuous and normal operation of the safety function of the production line.
Smart Images
Figure CN120386258A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of nuclear material production, and particularly relates to a control system and method for unloading and loading a nuclear material production line. Background Art
[0002] With the continuous improvement of nuclear safety requirements, the item classification principle has been gradually introduced into the nuclear material production line, and various accident conditions, including the event of losing normal power supply, need to be considered. The nuclear material production line is provided with safety-class and safety-related-class emergency power supply centers. In the event of losing normal power supply, the diesel generator set serves as a backup power supply to provide power to the safety-class and safety-related-class equipment required for in-depth defense, ensuring relevant safety and safety-related functions.
[0003] Since it takes a certain amount of time for the diesel generator set to reach full power operation after normal operation, if multiple high-power devices are started simultaneously, the superimposed inrush current generated will impact the diesel generator set. And there are the following problems in the power supply switching scenario of the nuclear material production line: its diesel generator set has a large power, and higher requirements for refined load management; the power distribution control circuits of related equipment are different, including DC control circuits (with UPS, Uninterruptible Power Supply) and AC control circuits.
[0004] Adopting a DC control circuit makes the device control circuit always in a charged state. After the power supply is switched, its logical state (such as operation instructions, device start-stop signals) will not be reset and may run immediately, becoming a sudden load and causing an impact; adopting an AC control circuit will result in the loss of the state and will not start automatically. Therefore, there is an urgent need for an unloading and loading control system suitable for the nuclear material production line to achieve stable power supply switching during power failure. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to provide a control system and method for unloading and loading a nuclear material production line in view of the above deficiencies of the prior art, which can achieve stable power supply switching for the requirements of large power of the diesel generator set in the nuclear material production line, different power distribution circuits of related load-bearing devices, and the need for long-term stable operation.
[0006] In a first aspect, the present invention provides a control system for unloading and loading a nuclear material production line, including a first control module.
[0007] The first control module is used to correspondingly control the stop or start of the device according to the time-sharing unloading signal or the reloading signal. The first control module includes a first OR gate, a second OR gate, a first NOT gate, a first AND gate, and a second AND gate. The input end of the first OR gate receives the time-sharing unloading signal and the stop command, and its output end issues a device stop command. The input end of the first NOT gate receives the time-sharing unloading signal. The input end of the first AND gate receives the start command and is connected to the output end of the first NOT gate. The input end of the second AND gate receives the reloading signal and is connected to the output end of the first NOT gate. The input ends of the second OR gate are respectively connected to the output ends of the first AND gate and the second AND gate, and its output end issues a device start command.
[0008] In some embodiments, the control system for unloading and loading of the nuclear material production line further includes a second control module.
[0009] The second control module, connected to the first control module, is used to control the generation and time-sharing holding of the unloading signal to generate a time-sharing unloading signal. The second control module includes a second NOT gate, a third AND gate, and a plurality of delay-off modules. The input end of the second NOT gate receives the voltage presence signal. The input end of the third AND gate receives the normal power circuit breaker open position signal and the emergency power circuit breaker closing confirmation signal, and is connected to the output end of the second NOT gate. The output end of the third AND gate generates an unloading signal. The plurality of delay-off modules respectively receive the unloading signal generated by the third AND gate and delay the unloading signal to generate a plurality of time-sharing unloading signals.
[0010] In some embodiments, the number and delay duration of the plurality of delay-off modules in the second control module are determined according to the diesel engine starting characteristics and the load carried.
[0011] In some embodiments, the control system for unloading and loading of the nuclear material production line further includes a third control module.
[0012] The third control module is used to control the generation of the reloading signal. The third control module includes a third NOT gate, an RS flip-flop, a plurality of AND gates, a first delay-off module, a second delay-off module, and a third delay-off module. The input ends of the fourth AND gate respectively receive the operating state and the start command processed by the first delay-off module, and its output end is connected to the set end of the RS flip-flop. The input ends of the fifth AND gate respectively receive the stop state and the stop command processed by the second delay-off module, and its output end is connected to the input end of the sixth AND gate. The third NOT gate receives the time-sharing unloading signal processed by the third delay-off module, and its output end is connected to the input end of the sixth AND gate. The reset end of the RS flip-flop is connected to the output end of the sixth AND gate. The input end of the seventh AND gate receives the time-sharing unloading signal processed by the third delay-off module and is connected to the output end of the RS flip-flop, and its output end generates a reloading signal.
[0013] In some embodiments, the delay times of the first delay-off module and the third delay-off module are determined according to the time duration from when the device receives the start command to when the operation status feedback signal is generated.
[0014] In some embodiments, the delay time of the second delay-off module is determined according to the time duration from when the device receives the stop command to when the stop status feedback signal is generated.
[0015] In some embodiments, the first control module and the second control module of the safety-class device are provided in the safety-class analog protection system, and the third control module of the safety-class device is provided in the safety-related control system. Also, the first control module, the second control module, and the third control module of the safety-related device are provided in the safety-related control system.
[0016] In a second aspect, the present invention further provides a control method for unloading and loading of a nuclear material production line, which is applied to the control system for unloading and loading of the nuclear material production line described in the first aspect. The method includes: receiving a time-sharing unloading signal, a reloading signal, a stop command, and a start command; performing an OR operation on the time-sharing unloading signal and the stop command, and then sending out the stop command; performing an AND operation on the inverted time-sharing unloading signal and the start command to obtain a first AND operation result; performing an AND operation on the inverted time-sharing unloading signal and the reloading signal to obtain a second AND operation result; performing an OR operation on the first AND operation result and the second AND operation result, and then sending out the start command.
[0017] In some embodiments, before receiving the time-sharing unloading signal, the control method for unloading and loading of the nuclear material production line further includes: receiving a normal power circuit breaker open position signal, a voltage presence signal, and an emergency power circuit breaker closing confirmation signal; performing an AND operation on the inverted voltage presence signal, the normal power circuit breaker open position signal, and the emergency power circuit breaker closing confirmation signal to generate an unloading signal; delaying the unloading signal to generate a plurality of time-sharing unloading signals.
[0018] The control system and method for unloading and loading of a nuclear material production line provided by the present invention receive a time-sharing unloading signal and a stop command through an OR gate, so that when the time-sharing unloading signal or the stop command is received, the device can be controlled to stop immediately; the time-sharing unloading signal is inverted through a NOT gate, which is used to shield the device start command and the reload command; the start command is connected to the NOT gate through an AND gate, so that the time-sharing unloading signal shields the start command; the reload signal is connected to the NOT gate through an AND gate, so that the time-sharing unloading signal shields the reload signal. By shielding the start command or the reload signal, it is possible to effectively block the mis-start of the DC control loop device caused by continuous power-on (such as running immediately when the control logic is not reset), and at the same time avoid the impact on the diesel generator set when multiple devices restart simultaneously. Moreover, the unloading signal is a time-sharing continuous unloading signal, which realizes the batch start of the device. Therefore, it is possible to further avoid the simultaneous start of multiple high-power devices after the power supply is switched, thereby realizing the stable switching of the power supply. Since the duration of the reload instruction is usually longer than that of the unloading instruction, after the time-sharing unloading instruction disappears, the reload signal can send a start command, thereby solving the restart of the load-bearing devices in the AC control loop and the DC control loop after load sweeping. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 FIG. 6 is a logic schematic diagram of a control system for unloading and loading of a nuclear material production line according to Embodiment 1 of the present invention;
[0020] Figure 2 FIG. 10 is a logic schematic diagram of the second control module according to Embodiment 1 of the present invention;
[0021] Figure 3 FIG. 14 is a logic schematic diagram of the third control module according to Embodiment 1 of the present invention;
[0022] Figure 4 FIG. 18 is a logic schematic diagram of another control system for unloading and loading of a nuclear material production line according to Embodiment 1 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] To enable those skilled in the art to better understand the technical solutions of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0024] It can be understood that the specific embodiments and the accompanying drawings described herein are only for explaining the present invention, rather than limiting the present invention.
[0025] It can be understood that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0026] It can be understood that for the convenience of description, only the parts related to the present invention are shown in the drawings of the present invention, and the parts unrelated to the present invention are not shown in the drawings.
[0027] It is understandable that each unit and module involved in the embodiments of the present invention may correspond to only one entity structure, or may be composed of multiple entity structures. Alternatively, multiple units and modules may also be integrated into one entity structure.
[0028] It is understandable that, without conflict, the functions and steps marked in the flowcharts and block diagrams of the present invention may occur in an order different from that marked in the accompanying drawings.
[0029] It is understandable that in the flowcharts and block diagrams of the present invention, the possible architectures, functions, and operations of the systems, devices, equipment, and methods according to the embodiments of the present invention are shown. Among them, each block in the flowchart or block diagram may represent a unit, module, program segment, or code, which contains executable instructions for implementing the specified function. Moreover, each block or combination of blocks in the block diagram and flowchart may be implemented by a hardware-based system for implementing the specified function, or may be implemented by a combination of hardware and computer instructions.
[0030] It is understandable that the units and modules involved in the embodiments of the present invention may be implemented in software or in hardware. For example, the units and modules may be located in the processor.
[0031] Embodiment 1:
[0032] As Figure 1 shown, this embodiment provides a control system for unloading and loading a nuclear material production line, including a first control module.
[0033] The first control module is used to correspondingly control the stop or start of the device according to the time-sharing unloading signal or the reloading signal. The first control module includes a first OR gate, a second OR gate, a first NOT gate, a first AND gate, and a second AND gate.
[0034] The input end of the first OR gate receives the time-sharing unloading signal and the stop command, and its output end issues a device stop command. The input end of the first NOT gate receives the time-sharing unloading signal. The input end of the first AND gate receives the start command and is connected to the output end of the first NOT gate. The input end of the second AND gate receives the reloading signal and is connected to the output end of the first NOT gate. The input end of the second OR gate is respectively connected to the output ends of the first AND gate and the second AND gate, and its output end issues a device start command.
[0035] Among them, the time-sharing unloading signal is used to represent an unloading signal that persists for several time periods. The unloading signal can issue a device stop command, and the reloading signal can issue a device restart command. The first control module is used to control the stop of the device according to the time-sharing unloading signal, and is also used to control the start of the device according to the reloading signal. The received stop command can be a manual or automatic stop command, and the received start command can be a manual or automatic start command. For example, in the case of the failure of the safety-related level control system, a start command for the safety-level device is given through the manual function of the safety-level simulation protection system.
[0036] In this embodiment, the first control module is used to issue a device stop command in response to the time-sharing unloading signal being true; issue a device start command in response to the reloading signal being true, and both the time-sharing unloading signal and the stop command being false; issue a device start command in response to the time-sharing unloading signal, the reloading signal, and the stop command all being false, and the start command being true. In this embodiment, the time-sharing unloading signal and the stop command are received through an OR gate, so that when the time-sharing unloading signal or the stop command is received, the device can be controlled to stop immediately; the time-sharing unloading signal is inverted through a NOT gate to be used to shield the device start command and the reloading command; specifically, the start command and the NOT gate are connected through an AND gate, so that the time-sharing unloading signal shields the start command; the reloading signal and the NOT gate are connected through an AND gate, so that the time-sharing unloading signal shields the reloading command. By shielding the start command or the reloading command, it is possible to effectively block the mis-start of the DC control loop device that may be caused by continuous power-on (such as the device running immediately when the control logic is not reset), and at the same time avoid multiple devices restarting simultaneously and impacting the diesel generator set. And the unloading signal is a time-sharing continuous unloading signal, realizing batch start of devices, so it is possible to further avoid multiple high-power devices starting simultaneously after power switching, thereby realizing stable power switching. Since the duration of the reloading instruction is usually longer than that of the unloading instruction, after the time-sharing unloading instruction disappears, the reloading signal can issue a start command, thus solving the restart of the load-bearing devices in the AC control loop and the DC control loop after load shedding. Therefore, in view of the characteristics and requirements of the nuclear material production line, such as large power of the diesel generator set, many load-bearing devices, different distribution circuits of relevant load-bearing devices, and long-term stable operation, etc., the control system in this embodiment can realize the unloading and reloading of the relevant devices at the safety level and the safety-related level required for in-depth defense after the normal power supply is switched to the standby power supply (diesel generator), ensuring that the device can be gradually reloaded and operated according to the operating requirements of the diesel generator set after load shedding, that is, protecting the process from the start of the diesel generator set to full power operation, and at the same time ensuring the stable operation of the safety and safety-related functions of the production line.
[0037] In some embodiments, the control system for unloading and loading of the nuclear material production line further includes a second control module.
[0038] The second control module, connected to the first control module, is configured to control the generation and time-sharing maintenance of the unloading signal to generate a time-sharing unloading signal.
[0039] As Figure 2 shown, the second control module includes a second NOT gate, a third AND gate, and a plurality of delay-off modules. The input terminal of the second NOT gate receives the voltage presence signal. The input terminals of the third AND gate receive the normal power circuit breaker open position signal and the emergency power circuit breaker closing confirmation signal, and are connected to the output terminal of the second NOT gate. The output terminal of the third AND gate generates the unloading signal. The plurality of delay-off modules respectively receive the unloading signal generated by the third AND gate and delay the unloading signal to generate a plurality of time-sharing unloading signals.
[0040] Among them, the generation and time-sharing maintenance of the unloading signal are achieved by receiving the normal power circuit breaker open position signal, the voltage presence signal, and the emergency power circuit breaker closing confirmation signal. The unloading signal is generated when the normal power circuit breaker is in the open position, the voltage is absent, and the emergency power circuit breaker closing confirmation signal exists; according to the characteristics of the diesel generator set and the load conditions, the unloading signal is grouped and time-segmented through the delay-off module for maintenance. It should be noted that the second control module is only enabled during the switching process from the normal power supply to the emergency power supply.
[0041] In this embodiment, based on the load characteristics of the diesel generator (for example, it can only carry a 500-kilowatt load during the startup phase), the time-sharing unloading signal holding logic is designed. Specifically, the time-sharing unloading signal (such as an unloading signal lasting for 10 s or 20 s) is generated through the delay-off module to ensure that the generator power rises in a stepped manner (such as loading a 500-kilowatt load at the 5th second, allowing a 1000-kilowatt load after 10 s, and allowing a 1500-kilowatt load after 20 s), avoiding instantaneous large-load impacts. Compared with the fixed-delay logic (for example, regardless of the generator model, a 10-s delay is uniformly set and then the equipment is reloaded), the time-sharing holding strategy of this embodiment can generate a global unloading signal according to the load characteristics of different diesel generator sets, with higher adaptability.
[0042] In some embodiments, the number and delay duration of the plurality of delay-off modules in the second control module are used to be determined according to the starting characteristics of the diesel engine and the load carried.
[0043] Exemplarily, the time-sharing unloading signal generated by 1 delay-off module with a delay duration of 5 s is transmitted to a 500-kilowatt load, and the time-sharing unloading signal generated by 1 delay-off module with a delay duration of 10 s is transmitted to a set of equipment with a total of 1000 kilowatts.
[0044] In some embodiments, the control system for unloading and reloading of the nuclear material production line further includes a third control module. The third control module is connected to the first control module and the second control module and is configured to control the generation of the reloading signal.
[0045] As shown Figure 3 in the figure, the third control module includes a third NOT gate, an RS flip-flop, several AND gates, a first delay-off module, a second delay-off module, and a third delay-off module. The input terminals of the fourth AND gate respectively receive the operating state and the start command processed by the first delay-off module, and its output terminal is connected to the set terminal of the RS flip-flop. The input terminals of the fifth AND gate respectively receive the stop state and the stop command processed by the second delay-off module, and its output terminal is connected to the input terminal of the sixth AND gate. The third NOT gate receives the time-sharing unloading signal processed by the third delay-off module, and its output terminal is connected to the input terminal of the sixth AND gate. The reset terminal of the RS flip-flop is connected to the output terminal of the sixth AND gate. The input terminal of the seventh AND gate receives the time-sharing unloading signal processed by the third delay-off module and is connected to the output terminal of the RS flip-flop, and its output terminal generates a reloading signal.
[0046] Among them, the third control module is used to receive the device start command, stop command, device operating state, device stop state, and the time-sharing unloading signal generated by the second control module. The third control module is also used to perform memory setting of the device operating state according to the device start command and the device operating state; and during the non-unloading period of the device, perform memory reset of the device operating state according to the device stop command and the device stop state. Optionally, if some devices cannot feedback the stop state signal, the third control module can participate in the logic by taking the inverse of the operating state. Then, according to the time-sharing unloading signal and combined with the device operating state memory, the reloading of the device is realized. The third control module is enabled in the device control logic of the loading program.
[0047] In this embodiment, the third control module adopts an RS flip-flop and dual-condition verification, which can solve the misjudgment caused by signal loss. For example, even if the device stop state signal is interrupted (such as a sensor failure), it can still be automatically reset through the inverse logic of the operating state, avoiding the inability to restart key devices (such as exhaust fans). It can also improve the reliability of state memory. Compared with the design that relies on a single feedback signal in the related art, the dual-condition verification (command + state) can significantly reduce the probability of misoperation. In addition, the combination of the time-sharing unloading signal and the timing control (the first, second, and third delay-off modules) ensures that the device restarts according to the predetermined timing, and the combination of the two realizes fine-grained timing control.
[0048] In some embodiments, the delay times of the first delay-off module and the third delay-off module are used to be determined according to the time from when the device receives the start command to the generation of the operating state feedback signal.
[0049] In some embodiments, the delay time of the second delay-off module is used to be determined according to the time from when the device receives the stop command to the generation of the stop state feedback signal.
[0050] In some embodiments, the first control module and the second control module of the safety-class device are provided in the safety-class simulation protection system, the third control module of the safety-class device is provided in the safety-related control system, and the first control module, the second control module, and the third control module of the safety-related device are provided in the safety-related control system.
[0051] In another partitioning method, the control system for unloading and loading of the nuclear material production line includes an emergency power supply system, a safety-class simulation protection system, and a safety-related control system. Among them, the generation of the unloading signal of the safety-class device is realized by the emergency power supply system, and the time-sharing holding of the unloading signal is realized by the safety-class simulation protection system. In other words, the function of the second control module is realized by the emergency power supply system and the safety-class simulation protection system. The generation of the reloading signal is realized by the safety-related control system. In other words, the function of the third control module is realized by the safety-related control system. The function of the equipment control logic unloading signal is realized by the safety-class simulation protection system to ensure that a stop command is issued during equipment unloading; the function of the reloading signal of the safety-class device is realized by the equipment control logic of the safety-related control system, and then the start command of the safety-related control system is sent to the preferred module of the safety-class simulation protection system, thereby realizing the automatic reloading of the safety-class device. That is, the function of the first control module of the safety-class device is realized by the safety-class simulation protection system. In the case of the failure of the safety-related control system, the reloading of the safety-class device is realized through the manual function of the safety-class simulation protection system. The entire unloading and loading process of the safety-related device is realized by the safety-related control system. That is, the functions of the first, second, and third control modules of the safety-related device are all realized by the safety-related control system.
[0052] Since the relevant equipment required for the in-depth defense of the nuclear material production line is divided into safety-class and safety-related classes, and the number of equipment is relatively large. Among them, the safety-class control system mostly uses a simulation protection system, and the logic implementation is relatively complex and not easy to modify. Taking a single column and typical functions as an example, there are about 1,200 relays alone. Therefore, in this embodiment, the first and second control modules (responsible for start / stop command processing and status memory) of the safety-class device are provided in the safety-class simulation protection system, which meets the high-reliability requirements, and the third control module of the safety-class device is provided in the safety-related control system. Digital circuits (such as microcontrollers) can be used to replace the relays, which can reduce the number of hardware relays, simplify the logic implementation, and make it easy to modify the control logic. In addition, setting the unloading and loading control system of the safety-related device in the safety-related control system meets the requirements of cost optimization and flexibility.
[0053] The control system for unloading and loading of the nuclear material production line in this embodiment realizes the generation and time-sharing holding of the unloading signal, the generation of the reloading signal for each device, and the unloading and loading control, ultimately achieving the generation and time-sharing holding of the device unloading signal during the normal power supply switching to the emergency power supply. After the switching, the unloading and loading processes of the safety-class and safety-related devices are carried out. This not only protects the operation of the diesel generator set but also ensures the stable operation of the safety functions of the production line.
[0054] The following describes the control system for unloading and loading of the nuclear material production line in combination with a specific application implementation method. Among them, the controlled device is the 01 exhaust fan (MOV2301).
[0055] The control system for unloading and loading of the nuclear material production line includes a first control module, a second control module, and a third control module. The functions of the control system include the generation and time-sharing holding of the unloading signal, the generation of the reloading signal for each device, and the unloading and loading control for each device.
[0056] The second control module realizes the generation and time-sharing holding of the unloading signal. The generation of the unloading signal is achieved by the emergency power supply system (which belongs to the analog system). By receiving the position of the normal power circuit breaker (001JA), the presence of voltage, and the closing confirmation signal of the emergency power circuit breaker (002JA), an unloading signal is generated when the position of the normal power circuit breaker (001JA) is in the open position, the voltage is absent, and the closing confirmation signal of the emergency power circuit breaker (002JA) is present. The time-sharing delay of the unloading signal is realized by the safety-class analog protection system. According to the characteristics of the diesel generator set and the load conditions, the unloading signal is grouped and time-segmented for holding through the delay-off module, such as the 10s unloading signal holding signal, the 30s unloading signal holding signal, etc.
[0057] The third control module realizes the generation of the reload signal. The reload signal generation of the 01 exhaust fan (MOV2301) is realized by the safety-related level control system (which belongs to the digital system). The 01 exhaust fan (MOV2301) receives its own start command (MOV2301_O), stop command (MOV2301_C), equipment operation status (MOV2301_R), stop status (MOV2301_G), and the 30s unloading signal generated by the second control module; according to the start command (MOV2301_O, held for 10s) of the 01 exhaust fan (MOV2301) and the equipment operation status (MOV2301_R), the equipment operation status memory is set; during the non-unloading period of the 01 exhaust fan (MOV2301), according to the equipment stop command (MOV2301_C, held for 10s) and the equipment stop status (MOV2301_G), the equipment operation status memory is reset; according to the 30s unloading signal, combined with the operation status memory of the 01 exhaust fan (MOV2301), the generation of the equipment reload signal is realized, and the reload signal is 10s longer than the holding time of the 30s unloading signal. 10s is the time from when the 01 exhaust fan (MOV2301) receives the command to executes the command and then receives the status feedback.
[0058] As Figure 4 shown, the first control module realizes the unloading and loading control. The unloading and loading control of the 01 exhaust fan (MOV2301) is realized by the safety-level analog protection system. The 01 exhaust fan (MOV2301) realizes the start and stop control of the equipment according to the time-sharing unloading signal and reload signal generated by the second control module, combined with the manual start / stop and DCS control logic. The 01 exhaust fan (MOV2301) receives the equipment unloading signal and reload signal. The unloading signal and the manual stop command are OR-operated to issue the equipment stop command; the equipment unloading signal is shielded from the equipment manual start command through a NOT gate and an AND gate; through OR-operation with the manual stop command, and then shielded from the equipment reload command through a NOT gate and an AND gate; the reload signal restarts the equipment through OR-operation with the manual start command. For the details of the unloading and loading control, see Figure 4 the logic within the dashed box in
[0059] Embodiment 2:
[0060] This embodiment provides a control method for unloading and loading in a nuclear material production line, which is applied to the control system for unloading and loading in the nuclear material production line described in Embodiment 1. The method includes:
[0061] Receiving the time-sharing unloading signal, reload signal, stop command, and start command;
[0062] Performing an OR operation on the time-sharing unloading signal and the stop command, and then issuing the stop command;
[0063] Invert the time-sharing unloading signal and perform an AND operation with the start command to obtain a first AND operation result;
[0064] Invert the time-sharing unloading signal and perform an AND operation with the reload signal to obtain a second AND operation result;
[0065] Perform an OR operation on the first AND operation result and the second AND operation result, and then issue a start command.
[0066] In this embodiment, in response to the time-sharing unloading signal being true, an equipment stop command is issued; in response to the reload signal being true, and both the time-sharing unloading signal and the stop command being false, an equipment start command is issued; in response to the time-sharing unloading signal, the reload signal, and the stop command all being false, and the start command being true, an equipment start command is issued.
[0067] In some embodiments, before receiving the time-sharing unloading signal, the control method for unloading and loading of the nuclear material production line further includes:
[0068] Receiving a normal power circuit breaker open position signal, a voltage presence signal, and an emergency power circuit breaker closing confirmation signal;
[0069] Invert the voltage presence signal, and perform an AND operation with the normal power circuit breaker open position signal and the emergency power circuit breaker closing confirmation signal to generate an unloading signal;
[0070] Delay the unloading signal to generate a plurality of time-sharing unloading signals.
[0071] In some embodiments, the control method for unloading and loading of the nuclear material production line includes: receiving a normal power circuit breaker open position signal, a voltage presence signal, and an emergency power circuit breaker closing confirmation signal; generating an unloading signal according to the normal power circuit breaker open position signal, the voltage presence signal, and the emergency power circuit breaker closing confirmation signal; according to the characteristics of the diesel generator set and the load conditions, the unloading signal is grouped and held in different time periods to obtain time-sharing unloading signals; receiving a start command, a stop command, the equipment operation status, the stop status, and the time-sharing unloading signal; performing a memory set of the equipment operation status according to the equipment start command and the equipment operation status; during the non-unloading period of the equipment, performing a memory reset of the equipment operation status according to the equipment stop command and the equipment stop status; some equipment cannot feedback the stop status signal, and the operation status is inverted to participate in the logic; according to the time-sharing unloading signal, combined with the memory of the equipment operation status, the reloading of the equipment is realized; the equipment control receives the equipment unloading signal and the reload signal, and the equipment unloading signal can issue an equipment stop command; the equipment unloading signal can shield the issuance of the equipment start command and the reload command; the reload signal can restart the equipment.
[0072] The control method for unloading and loading of the nuclear material production line in this embodiment includes unloading signal generation and time-sharing holding, reloading signal generation for each device, and unloading and loading control for each device. Unloading signal generation and time-sharing holding is to generate an unloading signal and continuously hold the unloading signal for several time periods according to the load characteristics during the full-power operation of the diesel generator set and in combination with the specific load during the conversion from normal power supply to diesel generator set power supply; reloading signal generation for each device is for the devices that perform safety or safety-related functions. By memorizing the operating state of the device and in combination with the unloading signal, the devices that were originally running generate reloading signals; unloading and loading control for each device is that the device controls the start and stop of the device according to the unloading signal and the reloading signal. This method can solve the problem that in the related technology, during the switching process from normal power supply to diesel generator set power supply, the devices that originally performed safety or safety-related functions can run again after the switching, and meet the load requirements during the process of the diesel generator set starting up to full-power operation, ensuring the continuous functioning of the safety and safety-related functions of the production line.
[0073] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.
Claims
1. A control system for unloading and loading a nuclear material production line, characterized in that, including a first control module, The first control module is used to correspondingly control the stop or start of the device according to the time-sharing unloading signal or the reloading signal. The first control module includes a first OR gate, a second OR gate, a first NOT gate, a first AND gate, and a second AND gate. The input terminal of the first OR gate receives the time-sharing unloading signal and the stop command, and its output terminal issues a device stop command. The input terminal of the first NOT gate receives the time-sharing unloading signal. The input terminal of the first AND gate receives the start command and is connected to the output terminal of the first NOT gate. The input terminal of the second AND gate receives the reloading signal and is connected to the output terminal of the first NOT gate. The input terminals of the second OR gate are respectively connected to the output terminals of the first AND gate and the second AND gate, and its output terminal issues a device start command.
2. The control system for unloading and loading of the nuclear material production line according to claim 1, characterized in that, It further includes a second control module. The second control module, connected to the first control module, is used to control the generation and time-sharing holding of the unloading signal to generate a time-sharing unloading signal. The second control module includes a second NOT gate, a third AND gate, and several delay-off modules. The input terminal of the second NOT gate receives the voltage presence signal. The input terminals of the third AND gate receive the normal power circuit breaker open position signal and the emergency power circuit breaker closing confirmation signal, and are connected to the output terminal of the second NOT gate. The output terminal of the third AND gate generates an unloading signal. Several delay-off modules respectively receive the unloading signal generated by the third AND gate and delay the unloading signal to generate several time-sharing unloading signals.
3. The control system for unloading and loading of the nuclear material production line according to claim 2, characterized in that, The number and delay duration of several delay-off modules in the second control module are used to be determined according to the diesel engine starting characteristics and the load carried.
4. The control system for unloading and loading of a nuclear material production line according to claim 2, characterized in that, It further includes a third control module. The third control module is used to control the generation of the reloading signal. The third control module includes a third NOT gate, an RS flip-flop, several AND gates, a first delay-off module, a second delay-off module, and a third delay-off module. The input terminals of the fourth AND gate respectively receive the running state and the start command processed by the first delay-off module, and its output terminal is connected to the set terminal of the RS flip-flop. The input terminals of the fifth AND gate respectively receive the stop state and the stop command processed by the second delay-off module, and its output terminal is connected to the input terminal of the sixth AND gate. The third NOT gate receives the time-sharing unloading signal processed by the third delay-off module, and its output terminal is connected to the input terminal of the sixth AND gate. The reset terminal of the RS flip-flop is connected to the output terminal of the sixth AND gate. The input terminal of the seventh AND gate receives the time-sharing unloading signal processed by the third delay-off module and is connected to the output terminal of the RS flip-flop, and its output terminal generates a reloading signal.
5. The control system for unloading and loading of the nuclear material production line according to claim 4, characterized in that, The delay duration of the first delay-off module and the third delay-off module is used to be determined according to the duration from when the device receives the start command to the generation of the running state feedback signal.
6. The control system for unloading and loading of a nuclear material production line according to claim 4, characterized in that, The delay duration of the second delay-off module is used to be determined according to the duration from when the device receives the stop command to the generation of the stop state feedback signal.
7. The control system for unloading and loading of a nuclear material production line according to claim 4, characterized in that, The first control module and the second control module of the safety-class device are arranged in the safety-class analog protection system, and the third control module of the safety-class device is arranged in the safety-related control system. Moreover, the first control module, the second control module, and the third control module of the safety-related device are arranged in the safety-related control system.
8. A control method for unloading and loading in a nuclear material production line, which is applied to the control system for unloading and loading in the nuclear material production line according to any one of claims 1-7, characterized in that, The method includes: Receive time-sharing unloading signals, reload signals, stop commands, and start commands; After performing an OR operation on the time-sharing unloading signal and the stop command, issue a stop command; Invert the time-sharing unloading signal and perform an AND operation with the start command to obtain a first AND operation result; Invert the time-sharing unloading signal and perform an AND operation with the reload signal to obtain a second AND operation result; After performing an OR operation on the first AND operation result and the second AND operation result, issue a start command.
9. The control method for unloading and loading of a nuclear material production line according to claim 8, characterized in that, Before receiving the time-sharing unloading signal, it further includes: Receive the normal power circuit breaker open position signal, voltage presence signal, and emergency power circuit breaker closing confirmation signal; Invert the voltage presence signal and perform an AND operation with the normal power circuit breaker open position signal and the emergency power circuit breaker closing confirmation signal to generate an unloading signal; Delay the unloading signal to generate a number of time-sharing unloading signals.