A method and device for unlocking control of a core pressure relief rupture valve controller

Abstract

The present invention discloses a control method and a deblocking device for a core pressure relief bursting valve controller. The present invention belongs to the technical field of digital instrument control for nuclear reactor protection. The proposed control method adds a deblocking state in front of the bursting valve controller, and detects several on-site signals representing working conditions and manual operation signals at the nuclear reactor site through the deblocking device. Under normal working conditions of the nuclear reactor, a locking signal is output to make the bursting valve controller in a locked state, and the ignition signal fails, preventing the bursting valve controller from accidentally igniting the bursting valve and reducing the risk of accidental triggering of the bursting valve controller; in the event of an accident, an unlocking signal is output to make the bursting valve controller quickly enter the unlocked state, and the bursting valve ignition signal can be normally provided, improving the reliability of the bursting valve controller and ensuring the safe operation of the system.

Description

Technical Field

[0001] The present invention belongs to the technical field of digital I&C for nuclear reactor protection, and particularly relates to a method and a device for unlocking and controlling a core relief rupture valve controller. Background Art

[0002] As a passive key device of the nuclear reactor protection system, the rupture valve ensures the reliable operation of the passive core cooling system during accidents by reducing the in-core pressure, and reduces the irradiation of equipment and maintenance personnel.

[0003] At present, the rupture valve controller mainly controls the ignition operation of the rupture valve according to system instructions. However, when the software system issues incorrect instructions or is affected by faults, there is a situation of misfiring the rupture valve, which will affect the operation stability and reliability of the nuclear reactor system. Summary of the Invention

[0004] In order to solve the problem that the rupture valve controller misfires due to incorrect instructions issued by the software system or being affected by faults, the present invention provides a method and a device for unlocking and controlling a core relief rupture valve controller. The unlocking control method proposed by the present invention can ensure that the rupture valve controller is in a locked state during normal reactor operation, the ignition signal fails, and the rupture valve cannot be ignited; in the event of an accident, it automatically or manually enters the unlocked state, and the rupture valve controller can normally output the ignition signal, thus avoiding the occurrence of misfiring.

[0005] The present invention is achieved by the following technical solutions:

[0006] A method for unlocking and controlling a core relief rupture valve controller, the unlocking control method comprising:

[0007] When the reactor is in normal operation, trigger the unlocking device to output a locking signal to control the rupture valve controller to be in a locked state, at this time the rupture valve controller cannot output an ignition signal;

[0008] When the reactor enters an accident condition, trigger the unlocking device to output an unlocking signal to control the unlocking of the rupture valve controller, at this time the rupture valve controller normally outputs an ignition signal.

[0009] There is a risk that the blasting valve controller may issue commands erroneously due to software system glitches or be mis-triggered due to malfunctions, which can affect the safe operation of the system. The control method proposed in this invention adds a locking / unlocking device in front of the blasting valve controller. The locking / unlocking device detects several on-site signals indicating operating conditions and manual operation signals at the nuclear reactor site. Under normal operating conditions of the nuclear reactor, a locking signal is output to keep the blasting valve controller in a locked state, rendering the ignition signal ineffective, preventing the blasting valve controller from misfiring the blasting valve, and reducing the risk of mis-triggering of the blasting valve controller. In the event of an accident, an unlocking signal is output to enable the blasting valve controller to quickly enter the unlocked state, allowing it to normally provide the ignition signal for the blasting valve, improving the reliability of the blasting valve controller, and ensuring the safe operation of the system.

[0010] As a preferred embodiment, the locking / unlocking control method of this invention further includes:

[0011] Detecting several on-site signals as the trigger signals for the locking / unlocking device.

[0012] As a preferred embodiment, the trigger signals of this invention include automatic trigger signals, manual trigger signals, and manual recovery signals;

[0013] Among them, the automatic trigger signals include at least one analog automatic trigger signal and / or at least one digital automatic trigger signal;

[0014] The result of the logical OR operation of at least one analog automatic trigger signal and / or at least one digital automatic trigger signal is used as the automatic trigger signal for the locking / unlocking device.

[0015] As a preferred embodiment, the locking / unlocking control method of this invention further includes:

[0016] When the reactor is in normal operating conditions and the trigger signals of the locking / unlocking device are all at a low level, the locking / unlocking device outputs a locking signal to control the blasting valve controller to be in a locked state;

[0017] When the reactor enters an accident condition, a high-level automatic trigger signal is generated to trigger the locking / unlocking device to output an unlocking signal to control the unlocking of the blasting valve controller; if the automatic trigger signal fails, a high-level manual trigger signal is generated to trigger the locking / unlocking device to output an unlocking signal to control the unlocking of the blasting valve controller.

[0018] As a preferred embodiment, the locking / unlocking control method of this invention further includes:

[0019] After the blasting valve controller enters the unlocked state and before the automatic trigger signal returns to a low level, the manual recovery signal is ineffective;

[0020] The unlocking and locking device is converted from the unlocking output to the locking output only when the automatic trigger signal returns to the low level, the manual trigger signal is at the low level, and the manual recovery signal output is at the high level.

[0021] As a preferred embodiment, the logic of the unlocking and locking device of the present invention is unlocking priority, that is, when the unlocking signal exists, it is not allowed to restore the locking state of the bursting valve controller.

[0022] On the other hand, the present invention also proposes an unlocking and locking device for a core pressure relief bursting valve controller. When the reactor is in a normal condition, the unlocking and locking device outputs a locking signal under the trigger of a trigger signal to control the bursting valve controller to be in a locked state. At this time, the bursting valve controller cannot output an ignition signal;

[0023] When the reactor enters an accident condition, the unlocking and locking device outputs an unlocking signal under the trigger of a trigger signal to control the unlocking of the bursting valve controller. At this time, the bursting valve controller normally outputs an ignition signal.

[0024] As a preferred embodiment, the unlocking and locking device of the present invention includes an automatic trigger unit, a manual trigger unit, a manual recovery unit, a logic unit, an unlocking and locking output unit, and an unlocking and locking indication unit;

[0025] Among them, the automatic trigger unit outputs an automatic trigger signal, and the automatic trigger signal includes at least an analog automatic trigger signal and / or at least one digital input automatic trigger signal;

[0026] The manual trigger unit outputs a manual trigger signal;

[0027] The manual recovery unit outputs a manual recovery signal;

[0028] The output signals of the automatic trigger unit, the manual trigger unit, and the manual recovery unit are used as the input signals of the logic unit. After logical operation, two signals are output, and the two signals are respectively input to the unlocking and locking output unit and the unlocking and locking indication unit;

[0029] The unlocking and locking output unit outputs an unlocking / locking signal according to the signal output by the logic unit to control the conversion of the unlocking and locking states of the bursting valve controller;

[0030] The unlocking and locking indication unit outputs an unlocking / locking indication signal.

[0031] As a preferred embodiment, the logic of the automatic trigger unit of the present invention is that when any analog automatic trigger signal or digital input automatic trigger signal is at the high level, the automatic trigger unit outputs a high-level automatic trigger signal;

[0032] When the reactor is in normal operation, both the analog automatic trigger signal and the digital automatic trigger signal are at low level, then the automatic trigger signal is at low level and the bursting disc valve controller is in the locked state;

[0033] When the reactor enters the accident condition, as long as one of the analog automatic trigger signal and the digital automatic trigger signal is at high level, then the automatic trigger signal is at high level, triggering the unlocking of the bursting disc valve controller.

[0034] As a preferred embodiment, for each analog automatic trigger signal of the present invention, a threshold value and a dead band value are set for threshold comparison, and the threshold value is less than the dead band value;

[0035] Under normal conditions, the analog automatic trigger signal is greater than the dead band value, outputting a low level to keep the bursting disc valve controller in the locked state; in accident conditions, when the analog automatic trigger signal drops below the threshold value, a high level is output to unlock the bursting disc valve controller, and it will not resume the low level output and the bursting disc valve controller will not resume the locked state until the analog automatic trigger signal rises above the dead band value again.

[0036] As a preferred embodiment, the manual trigger unit of the present invention uses a self-locking switch signal as the manual trigger signal and inputs it to the logic unit;

[0037] Under normal conditions, the self-locking switch contact is open, outputting a low level to keep the bursting disc valve controller in the locked state;

[0038] In accident conditions, if the automatic trigger signal fails, the self-locking switch is closed to output a high level to unlock the bursting disc valve controller.

[0039] As a preferred embodiment, the manual reset unit of the present invention uses a self-locking switch signal as the manual reset signal and inputs it to the logic unit;

[0040] After the bursting disc valve controller enters the unlocked state, before the automatic trigger signal returns to the low level, the manual reset signal fails;

[0041] When the automatic trigger signal returns to the low level and the manual trigger signal is at low level, the manual reset self-locking switch is closed, and the manual reset signal is at high level to make the bursting disc valve controller resume the locked state.

[0042] As a preferred embodiment, the logic unit of the present invention includes a preferred logic;

[0043] The preferred logic is composed of an OR gate, a NOT gate, and an AND gate. The input terminal of the NOT gate inputs a manual recovery signal. The output terminal of the NOT gate is connected to the first input terminal of the AND gate. The second input terminal of the AND gate is connected to the output terminal of the OR gate. The first input terminal of the OR gate inputs an automatic trigger signal. The second input terminal of the OR gate is connected to the output terminal of the AND gate. The output terminal of the OR gate serves as the output terminal of the preferred logic;

[0044] The preferred logic outputs an automatic unlocking signal. The automatic unlocking signal and the manual trigger signal are subjected to an OR operation to output a solution / locking indication signal, and then after a NOT operation, a solution / locking signal is output to the bursting valve controller.

[0045] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0046] 1. The solution / locking control method and device for the core pressure relief bursting valve controller proposed by the present invention can ensure that in the event of an accident, when any input trigger signal is present, an unlocking signal can be effectively output; while in the normal condition, a locking signal is output. At this time, the bursting valve controller cannot output an ignition signal, preventing the bursting valve controller from being accidentally triggered, and greatly improving the reliability of the bursting valve controller;

[0047] 2. The solution / locking control method and device for the core pressure relief bursting valve controller proposed by the present invention are based on designs such as redundancy and isolation, and have the advantages of simple implementation method and high reliability, and can be applied to the solution / locking control of the bursting valve controller in the reactor digital instrument and control system. Description of the Drawings

[0048] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not constitute a limitation to the embodiments of the present invention. In the drawings:

[0049] Figure 1 It is a schematic flowchart of the method of the embodiment of the present invention.

[0050] Figure 2 It is a schematic block diagram of the device of the embodiment of the present invention.

[0051] Figure 3 It is an exemplary diagram of the device of the embodiment of the present invention.

[0052] Figure 4 It is an exemplary diagram of the implementation of the preferred logic of the embodiment of the present invention. Detailed Embodiments

[0053] Hereinafter, the term "comprising" or "may comprise" that can be used in various embodiments of the present invention indicates the presence of the functions, operations or elements of the present invention, and does not limit the addition of one or more functions, operations or elements. In addition, as used in various embodiments of the present invention, the terms "comprising", "having" and their cognates are only intended to represent specific features, numbers, steps, operations, elements, components or combinations of the foregoing items, and should not be construed as precluding the existence or adding the possibility of one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing items first.

[0054] In various embodiments of the present invention, the expression "or" or "at least one of A or / and B" includes any combination or all combinations of the words listed simultaneously. For example, the expression "A or B" or "at least one of A or / and B" may include A, may include B, or may include both A and B.

[0055] Expressions (such as "first", "second", etc.) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but do not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only for the purpose of distinguishing one element from other elements. For example, without departing from the scope of various embodiments of the present invention, the first element may be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0056] It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. On the contrary, when one constituent element is "directly connected" to another constituent element, it can be understood that there is no third constituent element between the first constituent element and the second constituent element.

[0057] The terms used in various embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit various embodiments of the present invention. As used herein, the singular form is also intended to include the plural form unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which various embodiments of the present invention pertain. The terms (such as those defined in a commonly used dictionary) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning unless clearly defined in various embodiments of the present invention.

[0058] To make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with embodiments and drawings. The illustrative embodiments and descriptions thereof of the present invention are only used to explain the present invention and shall not be construed as a limitation to the present invention.

[0059] Embodiment:

[0060] In view of the situation that the blasting valve controller may misissue commands in the software system or misignite the blasting valve due to faults, affecting the operation stability, safety and reliability of the system, this embodiment proposes a method for unlocking and locking control of the core pressure relief blasting valve controller. The unlocking and locking control method proposed in this embodiment can ensure that the blasting valve controller is in a locked state during normal reactor operation, the ignition signal fails, and the blasting valve cannot be ignited; in accident conditions, the control blasting valve controller enters the unlocked state, and the blasting valve controller can normally output the blasting valve ignition signal, thus avoiding the risks of stability, safety and reliability caused by misigniting the blasting valve.

[0061] As Figure 1 shown, the method for unlocking and locking control of the core pressure relief blasting valve controller proposed in this embodiment specifically includes the following steps:

[0062] When the reactor is in normal conditions, trigger the unlocking and locking device to output a locking signal to control the blasting valve controller to be in a locked state, and the blasting valve controller cannot output an ignition signal;

[0063] When the reactor enters accident conditions, trigger the unlocking and locking device to output an unlocking signal to control the blasting valve controller to be in an unlocked state, and the blasting valve controller outputs an ignition signal.

[0064] Furthermore, the unlocking and locking control method proposed in this embodiment can select several on-site signals as the trigger signals of the unlocking and locking device. Specifically, the trigger signals can include automatic trigger signals, manual trigger signals and manual recovery signals. Among them, the automatic trigger signal can adopt an analog automatic trigger signal and / or a digital input automatic trigger signal. The automatic trigger signal, manual trigger signal and manual recovery signal are all input to the unlocking and locking device and generate an unlocking / locking signal after logical operation.

[0065] Furthermore, when the reactor enters accident conditions, an automatic trigger signal is generated to trigger the unlocking and locking device to output an unlocking signal to control the unlocking of the blasting valve controller. If the automatic trigger signal fails, the unlocking and locking device can also be manually triggered through a safety switch to output an unlocking signal to control the unlocking of the blasting valve controller. This embodiment can ensure the reliable unlocking of the blasting valve controller through multiple trigger signals.

[0066] Further, when the blast valve controller enters the unlocked state, an unlocking indication signal will be generated simultaneously. If the abnormal situation that causes unlocking is handled in a timely manner and it is necessary to restore the normal working condition, it can be executed through the manual restoration signal. Specifically, after the blast valve controller enters the unlocked state, the manual restoration signal is invalid before the automatic trigger signal returns to the low level; when the automatic trigger signal returns to the low level and the manual trigger signal is at the low level, and the manual restoration signal output is at the high level, the unlocking and locking device is converted from the unlocked output to the locked output.

[0067] Further, to prevent the blast valve from not being ignited due to the inability to unlock, the logic of the unlocking and locking device is unlocking priority, that is, when the unlocking signal exists, it is not allowed to restore the locked state of the blast valve controller.

[0068] Further, as Figure 2 shown, the unlocking and locking device of this embodiment mainly includes an automatic trigger unit, a manual trigger unit, a manual restoration unit, a logic unit, an unlocking and locking output unit, and an unlocking and locking indication unit.

[0069] Among them, the automatic trigger unit outputs an automatic trigger signal, and the automatic trigger signal includes an analog automatic trigger signal and a digital automatic trigger signal; the manual trigger unit outputs a manual trigger signal; the manual restoration unit outputs a manual restoration signal.

[0070] The output signals of the automatic trigger unit, the manual trigger unit, and the manual restoration unit are used as the input signals of the logic unit. After logical operation, two signals are output, and the two signals are respectively input to the unlocking and locking output unit and the unlocking and locking indication unit.

[0071] The unlocking and locking output unit outputs an unlocking / locking signal according to the signal output by the logic unit to control the conversion of the unlocking and locking states of the blast valve controller. Among them, under normal working conditions, the unlocking and locking output unit outputs a locking signal to control the blast valve controller to be in the locked state, and the blast valve controller cannot output an ignition signal; when the reactor enters an accident condition, the unlocking and locking output unit outputs an unlocking signal to control the blast valve controller to unlock.

[0072] The unlocking and locking indication unit outputs an unlocking / locking indication signal.

[0073] It should be noted that the unlocking and locking device of this embodiment can be implemented by hardware, software, or a combination of hardware and software. In this embodiment, the unlocking and locking device is exemplarily described in terms of the hardware implementation method.

[0074] Specifically, as Figure 3As shown, in this embodiment, the logic of the automatic trigger unit is that when any analog automatic trigger signal or digital automatic trigger signal is at a high level, the automatic trigger unit outputs a high-level automatic trigger signal. Under normal conditions, both the analog automatic trigger signal and the digital automatic trigger signal are in an untriggered state and output a low level, so the automatic trigger unit outputs a low level.

[0075] Specifically, after sampling the n-channel analog automatic trigger signals A1, A2, …, An, they are respectively converted into logic level signals through threshold comparison and then input into the logic unit. After isolating the n-channel digital automatic trigger signals B1, B2, …, Bn, they are converted into logic level signals and input into the logic unit. The result of the OR logic operation of the n-channel analog automatic trigger signals and the n-channel digital automatic trigger signals is used as the automatic trigger signal. Under normal conditions, both the analog automatic trigger signal and the digital automatic trigger signal are at a low level, so the automatic trigger signal is at a low level and the bursting disc valve controller is in a locked state. In an accident condition, as long as one of the analog automatic trigger signal and the digital automatic trigger signal is at a high level, the automatic trigger signal is at a high level, triggering the unlocking of the bursting disc valve controller.

[0076] Furthermore, for each channel of analog signal, a threshold and a hysteresis value are set for threshold comparison, and the threshold needs to be less than the hysteresis value. n is a positive integer. Under normal conditions, when the analog automatic trigger signal is greater than the hysteresis value, a low level is output, keeping the bursting disc valve controller in a locked state. When the analog automatic trigger signal drops to the hysteresis value and is greater than the threshold, the low level output is maintained, that is, when the analog automatic trigger signal fluctuates between the hysteresis value and the threshold, the low level output for locking is maintained. In an accident condition, when the analog automatic trigger signal drops below the threshold, a high level is output to unlock the bursting disc valve controller until the analog automatic trigger signal rises again to the hysteresis value, and then the low level output is restored, keeping the bursting disc valve controller in a locked state, that is, when the analog automatic trigger signal fluctuates between the threshold and the hysteresis value, the high level output for unlocking is maintained. For example, the analog automatic trigger signal is a current signal of 0 - 20 mA, the threshold is set to 16 mA, and the hysteresis value is set to 17 mA. Under normal conditions, the input analog signal is at 20 mA full scale. In an accident condition, when the input analog signal drops to 16 mA (threshold), a high-level automatic trigger signal is generated, and when the input analog signal rises again to 17 mA (hysteresis value), the normal low level output is restored. When the input analog signal fluctuates between 16 mA and 17 mA, it does not affect the output of the unlocking trigger signal.

[0077] In this embodiment, the manual trigger unit specifically uses a self-locking switch signal as the manual trigger signal MS and inputs it into the logic unit. Under normal operating conditions, the switch contacts are open, and a low level is output, causing the blasting valve controller to be in a locked state. In the event of an accident, if automatic unlocking fails, the manual trigger self-locking switch can be closed to output a high level to unlock the blasting valve controller.

[0078] In this embodiment, the manual recovery unit specifically uses a self-locking switch signal as the manual recovery signal MR and inputs it into the logic unit. When it enters the unlocked state due to reasons such as accidents, regular tests, or faults, after dealing with the accident or fault, or completing the regular test, when it is necessary to restore the normal locked state, the blasting valve controller can be restored to the locked state by closing the manual recovery self-locking switch when all automatic trigger signals are at a low level.

[0079] In this embodiment, the logic unit includes a preferred logic and other logic gates. As shown in Figure 4 The preferred logic is implemented by combining three logic gates: OR (U1), NOT (U2), and AND (U3). It includes two input terminals and one output terminal. The two input terminals are the set terminal and the clear terminal respectively. When a high level is input to the set terminal S, the output terminal F outputs a high level; when a low level is input to the set terminal S and a high level is input to the clear terminal C, the output terminal F outputs a low level; when both the set terminal S and the clear terminal C are input with low levels, the output terminal F maintains the previous state output. All automatic trigger signals (analog automatic trigger signals and digital automatic trigger signals) are input to the set terminal S of the preferred logic after OR operation, and the manual recovery signal is input to the clear terminal of the preferred logic. When the automatic trigger signal is in the triggered state, the manual recovery signal fails. When the automatic trigger signal is in the untriggered state, the manual recovery signal can convert the unlocking signal output by the preferred logic into a locking signal; the output terminal F of the preferred logic outputs an automatic unlocking signal, and the automatic unlocking signal and the manual unlocking signal are OR-operated to output a solution / locking indication signal, which is then NOT-operated to output a solution / locking signal to the blasting valve controller.

[0080] Based on the above logic, it can be known that:

[0081] Under normal operating conditions, the automatic trigger signal, manual trigger signal, and manual recovery signal are all at low level, and the output of low level keeps the blast valve controller in a locked state; in the event of an accident, the automatic trigger signal outputs a high level, that is, the set terminal S of the logic unit inputs a high level, then the output terminal F of the logic unit outputs a high level automatic unlocking signal, or when the automatic trigger signal fails, the manual trigger signal can be used, that is, closing the switch outputs a high level manual unlocking signal; once the unlocking signal is output, an unlocking indication signal and an unlocking signal will be generated, while under normal operating conditions, a locking indication signal and a locking signal will be output. When there is no trigger signal, that is, all trigger signals are at low level, at this time, the manual recovery self-locking switch can be closed according to the actual situation to output a high level, so that the blast valve controller returns to the locked state. The input-output logic table of the logic unit in this embodiment is shown in Table 1 below

[0082] Table 1 Truth Table of Locking and Unlocking Logic

[0083]

[0084] In the table, 0 represents low level, 1 represents high level, X represents any input, and Qn represents the output of the previous state. As shown in Table 1, under normal operating conditions, the analog automatic trigger signal, digital automatic trigger signal, manual unlocking signal, and manual recovery signal are all 0, then the locking signal is output to control the blast valve controller to be in the locked state; when entering the accident condition, when the analog automatic trigger signal, digital automatic trigger signal, or manual unlocking signal is 1, the unlocking signal is output to control the blast valve controller to unlock; after the blast valve controller enters the unlocked state, only when the automatic trigger signal and the manual trigger signal return to 0 and the manual recovery signal is 1, the unlocked state will be converted to the locked state. When the manual recovery signal is 0, the output of the locking and unlocking signal depends on the previous output state. If the previous state is unlocked, the unlocked output is maintained; if the previous state is locked, the locked output is maintained.

[0085] The locking and unlocking control method and device proposed in this embodiment have the advantages of high reliability, simple implementation, and complete functions, and can be applied to the locking and unlocking control of the blast valve controller in the digital I&C system of nuclear reactors, avoiding the safety risks caused by the accidental explosion of the blast valve by the blast valve controller.

[0086] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for unlocking and controlling a core pressure relief bursting valve controller, characterized in that, The unlocking control method includes: When the reactor is in normal operation, trigger the unlocking device to output a locking signal to control the blasting valve controller in a locked state. At this time, the blasting valve controller cannot output an ignition signal. When the reactor enters an accident condition, trigger the unlocking device to output an unlocking signal to control the unlocking of the blasting valve controller. At this time, the blasting valve controller normally outputs an ignition signal. The unlocking control method further includes: Detect several on-site signals as the trigger signals for the unlocking device. The trigger signals include an automatic trigger signal, a manual trigger signal, and a manual recovery signal. Among them, the automatic trigger signal includes at least one analog automatic trigger signal and / or at least one digital automatic trigger signal. The result after logical OR operation of at least one analog automatic trigger signal and / or at least one digital automatic trigger signal is used as the automatic trigger signal for the unlocking device. The unlocking control method further includes: When the reactor is in normal operation, if the trigger signals of the unlocking device are all at a low level, the unlocking device outputs a locking signal to control the blasting valve controller in a locked state. When the reactor enters an accident condition, generate a high-level automatic trigger signal to trigger the unlocking device to output an unlocking signal to control the unlocking of the blasting valve controller. If the automatic trigger signal fails, generate a high-level manual trigger signal to trigger the unlocking device to output an unlocking signal to control the unlocking of the blasting valve controller. The automatic trigger signal, manual trigger signal, and manual recovery signal are subjected to logical operation and then two signals are output. One signal is the unlocking / locking signal, which is used to control the conversion of the unlocking and locking states of the blasting valve controller. The other signal is the unlocking / locking indication signal. The process of the logical operation includes: the manual recovery signal is input to the input terminal of the NOT gate, the output terminal of the NOT gate is connected to the first input terminal of the AND gate, the second input terminal of the AND gate is connected to the output terminal of the OR gate, the first input terminal of the OR gate inputs the automatic trigger signal, the second input terminal of the OR gate is connected to the output terminal of the AND gate, the output terminal of the OR gate outputs an automatic unlocking signal, the automatic unlocking signal and the manual trigger signal are subjected to an OR operation to output an unlocking / locking indication signal, and then after a NOT operation, an unlocking / locking signal is output to the blasting valve controller.

2. The unlocking control method for the core pressure relief bursting valve controller according to claim 1, characterized in that, The unlocking control method further includes: After the blasting valve controller enters the unlocking state, before the automatic trigger signal returns to the low level, the manual recovery signal fails. When the automatic trigger signal returns to the low level and the manual trigger signal is at a low level, and the manual recovery signal output is at a high level, the unlocking device is converted from the unlocking output to the locking output.

3. A method for unlocking and controlling a core pressure relief bursting valve controller according to any one of claims 1-2, characterized in that, The logic of the unlocking device is unlocking priority, that is, when the unlocking signal exists, it is not allowed to restore the locking state of the blasting valve controller.

4. A device for unlocking a controller of a core pressure relief bursting valve, characterized in that, When the reactor is in normal operation, the unlocking device outputs a locking signal under the trigger of the trigger signal to control the blasting valve controller in a locked state. At this time, the blasting valve controller cannot output an ignition signal. When the reactor enters an accident condition, the unlocking device outputs an unlocking signal under the trigger of a trigger signal to control the unlocking of the bursting disc valve controller. At this time, the bursting disc valve controller normally outputs an ignition signal. The unlocking device includes an automatic trigger unit, a manual trigger unit, a manual recovery unit, a logic unit, an unlocking output unit, and an unlocking indication unit. Among them, the automatic trigger unit outputs an automatic trigger signal, and the automatic trigger signal includes at least one analog automatic trigger signal and / or at least one digital automatic trigger signal. The manual trigger unit outputs a manual trigger signal. The manual recovery unit outputs a manual recovery signal. The output signals of the automatic trigger unit, the manual trigger unit, and the manual recovery unit are used as the input signals of the logic unit. After logical operation, two signals are output, and the two signals are respectively input to the unlocking output unit and the unlocking indication unit. The unlocking output unit outputs an unlocking / locking signal according to the signal output by the logic unit to control the conversion of the unlocking and locking states of the bursting disc valve controller. The unlocking indication unit outputs an unlocking / locking indication signal. The logic of the automatic trigger unit is that when any analog automatic trigger signal or digital automatic trigger signal is at a high level, the automatic trigger unit outputs a high-level automatic trigger signal. Under normal operating conditions of the reactor, both the analog automatic trigger signal and the digital automatic trigger signal are at a low level, so the automatic trigger signal is at a low level, and the bursting disc valve controller is in a locked state. When the reactor enters an accident condition, as long as one of the analog automatic trigger signal and the digital automatic trigger signal is at a high level, the automatic trigger signal is at a high level, triggering the unlocking of the bursting disc valve controller. The logic unit includes a preferred logic. The preferred logic is composed of an OR gate, a NOT gate, and an AND gate. The input end of the NOT gate inputs the manual recovery signal, the output end of the NOT gate is connected to the first input end of the AND gate, the second input end of the AND gate is connected to the output end of the OR gate, the first input end of the OR gate inputs the automatic trigger signal, the second input end of the OR gate is connected to the output end of the AND gate, and the output end of the OR gate is used as the output end of the preferred logic. The preferred logic outputs an automatic unlocking signal. The automatic unlocking signal and the manual trigger signal are subjected to an OR operation to output an unlocking / locking indication signal, and then after a NOT operation, an unlocking / locking signal is output to the bursting disc valve controller.

5. The unlocking device for a core pressure relief bursting valve controller according to claim 4, characterized in that, For each analog automatic trigger signal, a threshold value and a dead band value are set to be compared with it respectively, and the threshold value is less than the dead band value. Under normal operating conditions, the analog automatic trigger signal is greater than the dead band value and outputs a low level, making the bursting disc valve controller in a locked state. In an accident condition, when the analog automatic trigger signal drops below the threshold value, it outputs a high level to unlock the bursting disc valve controller until the analog automatic trigger signal rises above the dead band value again, and then it resumes low-level output to make the bursting disc valve controller return to the locked state.

6. The unlocking device for the core pressure relief blasting valve controller according to claim 4, characterized in that, The manual trigger unit uses a self-locking switch signal as the manual trigger signal and inputs it to the logic unit. Under normal operating conditions, the self-locking switch contact is open, outputting a low level, causing the blasting valve controller to be in a locked state; In the event of an accident, if the automatic trigger signal fails, the self-locking switch is closed to output a high level to unlock the blasting valve controller.

7. The unlocking device for the core pressure relief bursting valve controller according to claim 4, characterized in that, The manual recovery unit uses the self-locking switch signal as the manual recovery signal and inputs it to the logic unit; After the blasting valve controller enters the unlocked state, the manual recovery signal fails before the automatic trigger signal returns to the low level; When the automatic trigger signal returns to the low level and the manual trigger signal is at the low level, closing the manual recovery self-locking switch and having the manual recovery signal at the high level can cause the blasting valve controller to return to the locked state.

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