A protection system for a control rod drive mechanism of a high-temperature gas-cooled reactor

Abstract

The control rod drive mechanism protection system for high-temperature gas-cooled reactors proposed in this application includes a detection module, a logic processing module, and an execution module. The logic processing module includes a first logic processing submodule and a second logic processing submodule. The detection module is used to acquire non-operational and normal operation signals of the control rods using displacement sensors. The logic processing module is used to receive signals through the first or second logic processing submodule, determine the type of the received signal, and generate corresponding execution instructions based on the signal type. The execution module is used to control the drive module or the channel baffle actuator to execute the execution instructions. Therefore, in the system proposed in this application, when a fault occurs, the channel baffle actuator can control the control rod channel baffle to close, preventing the control rod from falling and thus avoiding serious consequences for reactor control.

Description

Technical Field

[0001] This application relates to the field of high-temperature gas-cooled reactor technology, and in particular to a protection system for a control rod drive mechanism for high-temperature gas-cooled reactors. Background Technology

[0002] The control rod drive mechanism of a high-temperature gas-cooled reactor (HTGR) uses a stepper motor to drive the displacement of the control rod within the control rod channel, adjusting the reactivity of the reactor core. The position of the control rod within the channel is determined by the core operating conditions. In the event of a drive module failure, the control rod may fall into the core under gravity, affecting core power output. This is particularly problematic in HTGRs, where core power density is low and the power distribution under the spherical flow model is uneven. During reactor start-up, fuel loading is crucial; if the control rod falls during this phase due to drive module failure, it will have serious consequences for reactor control. Therefore, a protective system for the control rod drive mechanism in HTGRs is urgently needed. Summary of the Invention

[0003] This application provides a protection system for a control rod drive mechanism for a high-temperature gas-cooled reactor to solve the technical problems mentioned above in the related technologies.

[0004] The first aspect of this application proposes an embodiment.

[0005] A protection system for a control rod drive mechanism for a high-temperature gas-cooled reactor, characterized in that the system includes a detection module, a logic processing module, and an execution module, wherein the logic processing module includes a first logic processing submodule and a second logic processing submodule;

[0006] The detection module is used to acquire the non-operation signal and normal operation signal of the control rod using a displacement sensor;

[0007] The logic processing module is used to receive signals through a first logic processing submodule or a second logic processing submodule, determine the type of the received signal, and generate corresponding execution instructions based on the type of the signal.

[0008] The execution module is used to control the drive module or the channel baffle actuator to execute the execution command.

[0009] Optionally, the logic processing module is further configured to:

[0010] If it is determined that the type of the received signal is a non-operation signal, then a corresponding non-operation condition command is generated according to the type of the signal;

[0011] If it is determined that the type of the received signal is a normal operation signal, then a corresponding operation instruction is generated according to the type of the signal;

[0012] If the type of the received information is determined to be an abnormal operation signal, then a corresponding non-operational condition instruction is generated based on the type of the signal.

[0013] Optionally, the driving module includes a first driving submodule and a second driving submodule, and the execution module is specifically used for:

[0014] If the execution instruction is a non-operating condition instruction, then control the channel baffle actuator to execute the execution instruction;

[0015] If the execution instruction is a running instruction, then the first driving submodule or the second driving submodule is controlled to execute the execution instruction.

[0016] Optionally, the logic processing module further includes a first timing converter;

[0017] The first timing converter is used to switch between the first logic submodule and the second logic processing submodule.

[0018] Optionally, the drive module further includes a second timing converter, comprising:

[0019] The second timing converter is used to switch between the first driver submodule and the second driver submodule.

[0020] Optionally, the logic processing module is further configured to receive a first drive submodule fault signal and / or a second drive submodule fault signal sent by the drive module through a first logic processing submodule or a second logic processing submodule, and generate a non-operational condition command when the first drive submodule fault signal and the second drive submodule fault signal are received.

[0021] Optionally, the system further includes a display terminal connected to the logic processing module, the display terminal being used to display faults sent by the first driving submodule and / or the second driving submodule.

[0022] Optionally, the displacement sensor is installed in the upper part of the graphite stack internal components, in the control rod channel in the upper head of the pressure vessel, and the displacement sensor is located in the lower part of the control rod.

[0023] Optionally, controlling the channel baffle actuator to execute the execution command includes: controlling the control rod channel baffle to execute the execution command through the channel baffle actuator.

[0024] Optionally, the control rod channel baffle is located below the displacement sensor and is kept at a distance from the displacement sensor.

[0025] The technical solutions provided by the embodiments of this application have at least the following beneficial effects:

[0026] The control rod drive mechanism protection system for high-temperature gas-cooled reactors proposed in this application includes a detection module, a logic processing module, and an execution module. The logic processing module includes a first logic processing submodule and a second logic processing submodule. The detection module is used to acquire non-operational and normal operation signals of the control rod using a displacement sensor. The logic processing module is used to receive signals through the first or second logic processing submodule, determine the type of the received signal, and generate corresponding execution instructions based on the signal type. The execution module is used to control the drive module or the channel baffle actuator to execute the execution instructions. Therefore, in the system proposed in this application, when a fault occurs, the execution module can control the channel baffle actuator to execute the execution instructions received by the execution module, thereby causing the channel baffle actuator to close the control rod channel baffle to prevent the control rod from falling, thus preventing the control rod from falling and avoiding serious consequences for reactor control.

[0027] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0028] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0029] Figure 1 This is a schematic diagram of the structure of a control rod drive mechanism protection system for a high-temperature gas-cooled reactor according to an embodiment of this application;

[0030] Figure 2 This is a schematic diagram showing the position of the displacement sensor and control rod channel baffle according to one embodiment of this application. Detailed Implementation

[0031] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0032] The following description, with reference to the accompanying drawings, describes a protection system for a control rod drive mechanism of a high-temperature gas-cooled reactor according to an embodiment of this application.

[0033] Example 1

[0034] Figure 1 This is a schematic diagram of the structure of a control rod drive mechanism protection system for a high-temperature gas-cooled reactor according to an embodiment of this application, as shown below. Figure 1As shown, the system may include a detection module 101, a logic processing module 102, and an execution module 103. The logic processing module includes a first logic processing submodule 1021 and a second logic processing submodule 1022.

[0035] Detection module 101 is used to acquire non-operation signals and normal operation signals of the control rod using a displacement sensor;

[0036] The logic processing module 102 is used to receive signals through the first logic processing submodule 1021 or the second logic processing submodule 1022, determine the type of the received signal, and generate corresponding execution instructions according to the type of the signal.

[0037] The execution module 103 is used to control the drive module 1031 or the channel baffle actuator 1032 to execute the execution command.

[0038] In the embodiments of this application, the aforementioned logic processing module 102 is redundantly arranged through a first logic processing submodule 1021 and a second logic processing submodule 1022. Specifically, the first logic submodule 1021 and the second logic processing submodule 1022 both perform the same function, and one logic submodule is in normal working state while the other logic submodule is in standby state. When one logic submodule fails, the other logic submodule can start up in time to resume normal operation, thereby ensuring the normal operation of the entire system.

[0039] Furthermore, in embodiments of this application, the logic processing module further includes a first timing converter, which is used to switch between the first logic submodule and the second logic processing submodule.

[0040] In one embodiment of this application, a first timing converter is used to switch between the first logic submodule and the second logic submodule at regular intervals to avoid the first logic submodule or the second logic submodule being in a long-term standby state and thus failing to start.

[0041] Furthermore, in the embodiments of this application, the aforementioned first logic processing submodule 1021 or second logic processing submodule 1022 is specifically used for:

[0042] If the type of the received signal is determined to be a non-operation signal, then a corresponding non-operation condition command is generated based on the type of the signal.

[0043] If the type of the received signal is determined to be a normal operation signal, then the corresponding operation command is generated according to the type of the signal;

[0044] If the type of received information is determined to be an abnormal operation signal, then a corresponding non-operational condition command is generated based on the type of signal.

[0045] In the embodiments of this application, the aforementioned non-operation signal may be a non-operation signal issued by the drive module 1031 or a drive motor malfunction.

[0046] Furthermore, in the embodiments of this application, the aforementioned abnormal operation signal can be an operation signal directly sent by the operator to the logic processing module when the reactor needs to be shut down urgently. At this time, the logic processing module generates a corresponding non-operational condition instruction based on the received abnormal operation signal.

[0047] Furthermore, in the embodiments of this application, the aforementioned driving module includes a first driving submodule and a second driving submodule, and the aforementioned execution module is specifically used for:

[0048] If the instruction to be executed is a non-operating condition instruction, then the control channel baffle actuator will execute the instruction.

[0049] If the instruction to be executed is a run instruction, then the first driver submodule or the second driver submodule is controlled to execute the execution instruction.

[0050] Furthermore, in the embodiments of this application, the method for controlling the channel baffle actuator to execute the execution command may include: controlling the control rod channel baffle to execute the execution command through the channel baffle actuator.

[0051] It should be noted that in the embodiments of this application, if the execution instruction is a non-operating condition instruction, it indicates that a fault has occurred and the control rod channel baffle needs to be closed to prevent the control rod from falling. Based on this, the execution instruction can be executed by the control channel baffle actuator.

[0052] Furthermore, in the embodiments of this application, if the above-mentioned execution instruction is a running instruction, it indicates that it is a normal control core instruction, and the first drive submodule or the second drive submodule is controlled to execute the execution instruction.

[0053] Furthermore, in the embodiments of this application, the above-mentioned driving module further includes a second timing converter, which is used to switch between the first driving submodule and the second driving submodule.

[0054] In the embodiments of this application, the aforementioned driving module is also redundantly arranged through a first driving submodule and a second driving submodule. The specific implementation method is the same as that of the first logic submodule and the second logic submodule, and will not be described in detail here.

[0055] Furthermore, in the embodiments of this application, when the first driving submodule and / or the second driving submodule of the aforementioned driving module malfunctions, a first driving submodule malfunction signal and / or a second driving submodule malfunction signal will be sent to the logic processing module so that the logic processing module is aware that the first driving submodule and / or the second driving module in the aforementioned driving module has malfunctioned, thereby enabling the logic processing module to perform timely processing.

[0056] Furthermore, in the embodiments of this application, the above-mentioned logic processing module is also used to receive a first drive submodule fault signal and / or a second drive submodule fault signal sent by the drive module through a first logic processing submodule or a second logic processing submodule, and generate a non-operational condition command when the first drive submodule fault signal and the second drive submodule fault signal are received.

[0057] In one embodiment of this application, when the logic processing module receives a fault signal from either the first or second drive submodule, it indicates that only one drive submodule has failed. In this case, the execution instructions sent by the logic processing module can be executed through the normal drive submodule. Conversely, in another embodiment of this application, when the logic processing module receives both a fault signal from the first and second drive submodules, it indicates that the drive module cannot operate normally. The logic processing module then generates a non-operating condition instruction to cause the actuator of the execution module's control channel baffle to close the control rod channel baffle, thereby preventing the control rod from falling.

[0058] Furthermore, in embodiments of this application, the system further includes a display terminal 104, which is connected to the logic processing module. The display terminal is used to display that the first driving submodule and / or the second driving submodule has malfunctioned. Specifically, in embodiments of this application, when the logic processing module receives a fault signal from the first driving submodule and / or the second driving submodule, it can send the fault signal to the display terminal, allowing the display terminal to display that the first driving submodule and / or the second driving submodule has malfunctioned. This enables the user to know that the driving module has malfunctioned so that they can handle it in a timely manner.

[0059] Furthermore, in the embodiments of this application, Figure 2 This is a schematic diagram showing the position of a displacement sensor and a control rod channel baffle provided in an embodiment of this disclosure. Figure 2 As shown, the displacement sensor is installed on the upper part of the graphite stack internal components, in the control rod channel in the upper head of the pressure vessel, and the displacement sensor is located at the lower part of the control rod; the control rod channel baffle is located at the lower part of the displacement sensor and maintains a distance from the displacement sensor.

[0060] In summary, the control rod drive mechanism protection system for high-temperature gas-cooled reactors proposed in this application includes a detection module, a logic processing module, and an execution module. The logic processing module includes a first logic processing submodule and a second logic processing submodule. The detection module is used to acquire non-operational and normal operation signals of the control rod using a displacement sensor. The logic processing module is used to receive signals through the first or second logic processing submodule, determine the type of the received signal, and generate corresponding execution instructions based on the signal type. The execution module is used to control the drive module or the channel baffle actuator to execute the execution instructions. Therefore, in the system proposed in this application, when a fault occurs, the execution module can control the channel baffle actuator to execute the execution instructions received by the execution module, thereby causing the channel baffle actuator to close the control rod channel baffle to prevent the control rod from falling, thus preventing the control rod from falling and avoiding serious consequences for reactor control.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0063] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A control rod drive mechanism protection system for a high temperature gas cooled reactor, characterized in that, The system comprises a detection module, a logic processing module and an execution module, the logic processing module comprises a first logic processing submodule and a second logic processing submodule; The detection module is configured to acquire a non-operation signal and a normal operation signal of the control rod by using a displacement sensor; The logic processing module is configured to receive a signal by the first logic processing submodule or the second logic processing submodule, determine a type of the received signal, and generate a corresponding execution instruction according to the type of the signal; The execution module is configured to control a driving module or a channel baffle actuator to execute the execution instruction; The first logic processing submodule or the second logic processing submodule is specifically configured to: If it is determined that the type of the received signal is the non-operation signal, generate a corresponding non-operation condition instruction according to the type of the signal; If it is determined that the type of the received signal is the normal operation signal, generate a corresponding operation instruction according to the type of the signal; If it is determined that the type of the received signal is an abnormal operation signal, generate a corresponding non-operation condition instruction according to the type of the signal; The driving module comprises a first driving submodule and a second driving submodule, and the execution module is specifically configured to: If the execution instruction is the non-operation condition instruction, control the channel baffle actuator to execute the execution instruction; If the execution instruction is the operation instruction, control the first driving submodule or the second driving submodule to execute the execution instruction; The logic processing module is further configured to receive a first driving submodule fault signal and / or a second driving submodule fault signal sent by the driving module by the first logic processing submodule or the second logic processing submodule, and generate a non-operation condition instruction when the first driving submodule fault signal and the second driving submodule fault signal are received.

2. The system of claim 1, wherein, The logic processing module further comprises a first timing converter; The first timing converter is configured to switch the first logic processing submodule and the second logic processing submodule.

3. The system of claim 1, wherein, The driving module further comprises a second timing converter; The second timing converter is configured to switch the first driving submodule and the second driving submodule.

4. The system of claim 1, wherein, The system further comprises a display terminal connected to the logic processing module, and the display terminal is configured to display that the first driving submodule and / or the second driving submodule has a fault.

5. The system of claim 1, wherein, The displacement sensor is installed on an upper portion of a graphite internal structure and in a control rod channel in a pressure vessel upper head, and the displacement sensor is located at a lower portion of the control rod.

6. The system of claim 1, wherein, The control of the channel baffle actuator to execute the execution instruction comprises control of a control rod channel baffle to execute the execution instruction by the channel baffle actuator.

7. The system of claim 6, wherein, The control rod channel baffle is located at a lower portion of the displacement sensor and maintains a distance from the displacement sensor.

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