CN114530268A - Reactor protection method, system and computer readable storage medium - Google Patents
Reactor protection method, system and computer readable storage medium Download PDFInfo
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- Y02E30/00—Energy generation of nuclear origin
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Abstract
A method, system and computer readable medium for protecting a reactor, the method for protecting the reactor comprising: receiving a detection result of the reactor power detected by the detector system; and generating a signal according to the detection result of the detector system, and adjusting the protection strategy of the reactor according to the signal. The protection method, the system and the computer readable medium for the reactor according to the embodiment of the application can relieve the operation pressure of reactor operators and reduce the fault rate.
Description
Technical Field
The present application relates to the field of nuclear reactor technology, and in particular, to a method, system, and computer readable storage medium for protecting a nuclear reactor.
Background
The protection systems of nuclear reactors generally have a plurality of protection functions, and in some conditions, a certain protection function may not be needed or appropriate, and needs to be turned off and turned on in appropriate conditions. In the prior art, the protection functions of the nuclear reactor are opened or closed frequently by manual operation of operators, the error probability is high, and the operation pressure of the operators is high.
Disclosure of Invention
In view of the above, the present application is made to provide a method, an apparatus and a computer readable storage medium for protecting a reactor that overcome or at least partially solve the above problems.
According to a first aspect of embodiments of the present application, there is provided a reactor protection method, including: receiving a detection result of the reactor power detected by the detector system; generating a signal according to a detection result of the detector system, and adjusting a protection strategy of the reactor according to the signal, wherein generating the signal according to the detection result of the detector system comprises: when the detection result of the detector system is higher than a first fixed value, continuously generating a first signal, and when the detection result of the detector system is lower than the first fixed value, stopping generating the first signal, wherein the first fixed value indicates that the detector system has switched to the intermediate range detector; continuously generating the second signal when the detection result of the detector system is higher than a second constant value, and stopping generating the second signal when the detection result of the detector system is lower than the second constant value, wherein the second constant value indicates that the power of the reactor leaves the detection range of the source range detector of the detector system; adjusting a protection strategy of the reactor according to the signal includes: when a second signal appears in the signals, automatically turning off the power supply of the source range detector, and automatically turning off the first protection function; when a first signal in the signals disappears, automatically starting a power supply of the source range detector, and automatically starting a first protection function; when the first protection function is started, the reactor is allowed to automatically stop when the source range multiplication period is smaller than the corresponding preset value.
According to a second aspect of embodiments of the present application, there is provided a protection system for a reactor, including: the receiving module is used for receiving the detection result of the detector system for detecting the power of the reactor; the system comprises a generating module and an adjusting module, wherein the generating module is used for generating a signal according to a detection result of a detector system, the adjusting module is used for adjusting a protection strategy of the reactor according to the signal, and when the generating module generates the signal according to the detection result of the detector system, the generating module is specifically used for: when the detection result of the detector system is higher than a first fixed value, continuously generating a first signal, and when the detection result of the detector system is lower than the first fixed value, stopping generating the first signal, wherein the first fixed value indicates that the detector system has switched to the intermediate range detector; continuously generating the second signal when the detection result of the detector system is higher than a second constant value, and stopping generating the second signal when the detection result of the detector system is lower than the second constant value, wherein the second constant value indicates that the power of the reactor leaves the detection range of the source range detector of the detector system; when the adjusting module adjusts the protection strategy of the reactor according to the signal, the adjusting module is specifically configured to: when a second signal appears in the signals, automatically turning off the power supply of the source range detector, and automatically turning off the first protection function; when a first signal in the signals disappears, automatically starting a power supply of the source range detector, and automatically starting a first protection function; when the first protection function is started, the reactor is allowed to automatically stop when the source range multiplication period is smaller than the corresponding preset value.
According to a third aspect of embodiments herein, there is provided a computer readable storage medium having stored thereon computer instructions which, when executed by a computer, implement a method according to the first aspect of embodiments herein.
The protection method, the system and the computer readable medium for the reactor according to the embodiment of the application can relieve the operation pressure of reactor operators and reduce the fault rate.
Drawings
FIG. 1 is a flow chart of a reactor protection method according to an embodiment of the present application;
FIG. 2 is a schematic diagram of detection ranges of detectors in a detector system according to an embodiment of the present application;
FIG. 3 is a logic diagram illustrating a first protection function turning on and off according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a protection system for a reactor according to an embodiment of the present application;
fig. 5 is a schematic diagram of a computer-readable storage medium according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be described below in detail and completely with reference to the accompanying drawings of the embodiments of the present application. It should be apparent that the described embodiment is one embodiment of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without any inventive step, are within the scope of protection of the application.
It is to be noted that, unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. If the description "first", "second", etc. is referred to throughout, the description of "first", "second", etc. is used only for distinguishing similar objects, and is not to be construed as indicating or implying a relative importance, order or number of technical features indicated, it being understood that the data described in "first", "second", etc. may be interchanged where appropriate. If "and/or" is presented throughout, it is meant to include three juxtapositions, exemplified by "A and/or B" and including either scheme A, or scheme B, or schemes in which both A and B are satisfied.
An embodiment according to the present application first provides a protection method of a reactor, referring to fig. 1, including:
step S102: receiving a detection result of the reactor power detected by the detector system;
step S104: a signal is generated based on the detection result of the detector system,
step S106: and adjusting the protection strategy of the reactor according to the signal.
The generating of the signal according to the detection result of the detector system in step S104 may specifically include: when the detection result of the detector system is higher than a first fixed value, continuously generating a first signal, and when the detection result of the detector system is lower than the first fixed value, stopping generating the first signal, wherein the first fixed value indicates that the detector system has switched to the intermediate range detector; the second signal is continuously generated when the detection result of the detector system is higher than a second constant value, and the second signal is stopped when the detection result of the detector system is lower than the second constant value, wherein the second constant value indicates that the power of the reactor leaves the detection range of the source range detector of the detector system.
The adjusting the protection strategy of the reactor according to the signal in step S106 may specifically include: when a second signal appears in the signals, automatically turning off the power supply of the source range detector, and automatically turning off the first protection function; when a first signal in the signals disappears, automatically starting a power supply of the source range detector, and automatically starting a first protection function; when the first protection function is started, the reactor is allowed to automatically stop when the source range multiplication period is smaller than the corresponding preset value.
The detector systems used in nuclear reactors generally comprise a source range detector, a middle range detector and a power range detector, the three detectors having different measurement ranges, for example, fig. 2 shows a source range detector detection range 21, a middle range detector detection range 22 and a power range detector detection range 23, respectively, and the detection ranges of the three detectors overlap by one or more orders of magnitude, respectively, so that the dead zones of measurement can be eliminated, and the functions are restricted and supplemented with each other.
The source range detector, the intermediate range detector and the power range detector have certain differences from model selection to result output. The source range detector usually adopts a neutron counter, and the output of the neutron counter is a counting rate signal. The intermediate range detector is usually a fission ionization chamber, and outputs a count rate signal and/or a mean square voltage signal. The power range detector usually adopts a compensation ionization chamber, and the output signal of the compensation ionization chamber is a current signal.
In step S104, a signal, which is also referred to as an enable signal in the related art, is generated from the measurement result output by the above-described probe. In this embodiment, the first signal continues to be generated when the result of the detector output is above a first certain value, also referred to in the related art as the P6 certain value, and stops being generated when the result of the detector output is below the first certain value, also referred to as the P6 signal, indicating that the detector system has switched to the mid-range detector. A second signal is generated from a second constant value, also referred to as the P8 constant value, in a similar principle, also referred to as the P8 signal. The positions of the P6 fixed value and the P8 fixed value in the detection ranges of the three detectors are exemplarily depicted in fig. 2, and it is understood that those skilled in the art can select the appropriate P6 fixed value and P8 fixed value according to the safety criteria commonly used in the art and by combining the actually selected detector model and the measurement range, and accordingly generate the P6 signal and the P8 signal, which will not be described in detail herein. It will be appreciated that during the reactor power up phase, the P6 signal and the P8 signal will appear successively, and the appearance of the P8 signal means that the power of the reactor has left the detection range of the source range detector, and then the power of the source range detector can be automatically turned off, and the first protection function of the reactor can be turned off. Shutting down a first protection function of a reactor is also known in the art as bypassing the protection function, and in colloquial, bypassing refers to blocking or placing some part of the safety function of a system in an inoperative state by a series of special means to prevent unnecessary or undesired triggering of protection actions during operation, maintenance and testing of a nuclear power plant in order to ensure that the relevant operations do not affect the normal operation of the plant and to ensure the ability of the protection system to perform the safety function.
The first protection function, also referred to in the related art as a source range short period protection function, when turned on, will start shutdown when detecting that the source range multiplication period of the reactor power is less than a predetermined value, to prevent the reactor power from rising too fast to cause danger, and when the second signal occurs, the reactor power has already reached the range of the middle range, so the first protection function needs to be turned off to enable the reactor power to continue rising.
After the first signal disappears, the first protection function needs to be restarted, where it should be noted that the disappearance of the first signal refers to the disappearance of the first signal from the signal when the first signal originally exists in the signal, that is, the power drops below the first fixed value in the characteristic power reduction process, and at this time, the power of the reactor already returns to the source range, but the first protection function is still in the off state, so that the first protection function needs to be restarted. During the power-up process, before the first signal appears and when the first signal appears but the second signal does not appear, the first protection function is in an on state by default.
The reactor protection method according to the embodiment of the application can automatically turn on or off the first protection function according to the P6 signal and the P8 signal without manual turning off by an operator, thereby reducing the operation pressure of the operator and reducing the error rate.
In some embodiments, it is understood that it may take some time to enter the steady state after the power of the source range detector is started, and therefore, it is necessary to turn on the first protection function after a delay after the power of the source range detector is started to prevent the unstable state of the source range detector from accidentally triggering shutdown, specifically, when the first signal in the signals disappears, the power of the source range detector is automatically turned on, and the first protection function is turned on after the power of the source range detector has been turned on for a first preset time, wherein the first preset time is the time required for the power of the source range detector to reach the steady state from being turned on.
In some embodiments, generating the signal according to the detection result of the detector system may further include: when the detection result of the detector system is higher than a third fixed value, the third signal is continuously generated, and when the detection result of the detector system is lower than the third fixed value, the third signal is stopped being generated, wherein the third fixed value indicates that the detector system is switched to the power range detector; the fourth signal is continuously generated when the detection result of the detector system is higher than a fourth fixed value, and the fourth signal is stopped when the detection result of the detector system is lower than the fourth fixed value, wherein the fourth fixed value indicates that the power of the reactor leaves the detection range of the intermediate-range detector of the detector system.
Accordingly, adjusting the protection strategy of the reactor according to the signal further comprises: when a fourth signal appears in the signals, automatically turning off the power supply of the intermediate range detector and automatically turning off the second protection function; when the third signal in the signals disappears, automatically starting the power supply of the intermediate range detector and automatically starting the second protection function; when the second protection function is started, the reactor is allowed to automatically stop when the multiplication period of the intermediate range is smaller than the corresponding preset value.
Similarly to the generation of the first and second signals, the third and fourth signals are generated from the third and fourth fixed values, respectively. The third constant value is also referred to as the P9 constant value in the related art, the third signal is also referred to as the P9 signal, and the presence of the P9 signal means that the power of the reactor has entered the detection range of the power span detector. The fourth constant value, also referred to in the related art as the P10 constant value, is also referred to as the P10 signal, and the presence of the P10 signal means that the power of the reactor may already be measured without the mid-range detector, although it may still be in the detection range of the mid-range detector. The positions of the P9 constant value and the P10 constant value in the detection ranges of the three detectors are also exemplarily depicted in fig. 2, and it is understood that those skilled in the art can select the appropriate P9 constant value and P10 constant value according to the safety criteria commonly used in the art and in combination with the actually selected detector model and measurement range, and accordingly generate the P9 signal and the P10 signal, which will not be described herein again.
During the phase of the rising reactor power, the P9 signal and the P10 signal occur in succession, when the P10 signal occurs, this means that it is already possible to measure without the intermediate-range detector, so that the intermediate-range detector can be automatically switched off and the second protection function can be switched off.
The second protection function, also known in the related art as a mid-span short-period protection function, when turned on, will initiate shutdown when the mid-span multiplication period of the reactor power is detected to be less than a predetermined value, to prevent the reactor power from rising too fast, which may cause a hazard, and when the P10 signal occurs, the reactor power has already reached the range of the power span and the mid-span detector has been turned off, so that the second protection function needs to be turned off to enable the reactor power to continue to rise.
Similarly to the first signal, the disappearance of the third signal means that the third signal disappears when the third signal is originally present in the signal, that is, the third signal refers to a situation where the power drops below the third fixed value during the power down process, and at this time, the power of the reactor has returned to the middle range, but the second protection function is still in the off state, so that the second protection function needs to be turned on again.
In some embodiments, it is understood that it may take some time to reach steady state after the power supply to the source range detector is started, and therefore, it is necessary to delay the start of the power supply to the intermediate range detector before the second protection function is turned on to prevent the unstable state of the intermediate range detector from accidentally triggering shutdown. Specifically, when the third signal among the signals disappears, the power of the intermediate range detector is automatically turned on, and the second protection function is turned on after the power of the source range detector has been turned on for a second preset time, which is the time required for the power of the intermediate range detector to reach a steady state from being turned on.
In some embodiments, as described above, the signals output by the intermediate range detector and the power range detector are different, and the generation of the first signal and the second signal is generally dependent on the detection result of the intermediate range detector, and if the intermediate range detector is turned off (the fourth signal appears), the first signal and the second signal may disappear, and the first signal and the second signal reappear after the intermediate range detector is turned back on (the power drops to the point that the third signal disappears), and it will be understood that the third signal is also necessarily present when the fourth signal appears.
In some embodiments, as described above, after the power of the intermediate-range detector is turned on, a period of time is required to pass before the intermediate-range detector reaches the steady state, and the intermediate-range detector can generate the first signal, the second signal, and the like according to the output result thereof more stably after the intermediate-range detector reaches the steady state.
Therefore, in this embodiment, the power supply of the source range detector and the first protection function are continuously kept in the off state within a third predetermined time from the disappearance of a third signal in the signals, where the third predetermined time is the time from the turning on of the power supply of the intermediate range detector to the time at which the first signal and/or the second signal can be generated according to the detection result of the detector system, and it should be noted that the predetermined time from the disappearance of the third signal is the time from the beginning of the calculation of the third disappearance when the third signal originally appears in the signal, that is, the case where the third signal disappears in the process of specifically referring to the power reduction. The third predetermined time may be the same as the second predetermined time, or slightly longer than the second predetermined time, and those skilled in the art may set the third predetermined time according to actual situations, which is not described herein again.
A schematic diagram of the switching on and off logic of the first protection function is shown in fig. 3, which combines the above embodiments, wherein,
in order to get the opposite result,
in order to reset the priority RS flip-flop,
the order of the two is and,
the number of the negative or positive is not,
for the delay, when the input changes from true (1) to false (0), the output changes to false after the delay, and when the input changes from false to true, the output immediately changes to true.
Referring to fig. 3, when the first signal is present, the P6 input is 1, the non-present P6 input is 0, the second signal is present, the P8 input is 1, the non-present P8 input is 0, the third signal is present, the P9 input is 1, and the non-present P9 input is 0, the first protection function is turned on, the output is 0, and the first protection function is turned off according to the above logic if the output is 1.
In some embodiments, adjusting the protection strategy of the reactor according to the signal further comprises: when the fourth signal does not appear in the signals, closing the third protection function; and when a fourth signal appears in the signals, starting a third protection function, wherein when the third protection function is started, the reactor is allowed to automatically stop when the flow power ratio of the first loop/the second loop is lower than a corresponding preset value. It will be appreciated that when the power of the reactor is low (before the fourth signal occurs), the flow to power ratio is a large value, and there is no low flow to power ratio, so that the third protection function is turned off before the fourth signal occurs and turned on after the fourth signal occurs.
In some embodiments, generating a signal from the detection results of the detector system comprises: when the detection result of the detector system is higher than a fifth fixed value, continuously generating a fifth signal; and stopping generating the fifth signal when the detection result of the detector system is lower than a fifth constant value, wherein the fifth constant value is 25% of nuclear heating power of the reactor.
Accordingly, adjusting the protection strategy of the reactor according to the signal further comprises: and activating a fourth protection function when a fifth signal is present in the signals, wherein the fourth protection function, when activated, allows the reactor to automatically shutdown when the turbine bypass bleed system is not available.
The fifth constant value is set to 25% RTP (nuclear heating power) of the reactor, and the fifth signal is also referred to as P25 in the related art, and it is understood that the turbine of the reactor does not reach an on-stream condition before the fifth signal occurs, and is in a stopped state, and the turbine reaches an on-stream state after the fifth signal occurs, and thus, the fourth protection function does not need to be turned on until the fifth signal occurs.
In some embodiments, when the signal is generated according to the detection result of the detector system, the signal is generated by using a two-out-of-four logic, specifically, each detector in the detector system may have four channels, and when the detection results of two or more channels in the four channels meet corresponding conditions, the corresponding signals are generated, so as to achieve the effect of redundant control. In some other embodiments, two out of three logic may also be used to generate the signal.
There is also provided, in accordance with an embodiment of the present application, a protection system for a reactor, referring to fig. 4, including: the receiving module 41, the receiving module 41 is configured to receive a detection result of the reactor power detected by the detector system; a generating module 42 for generating a signal based on the detection result of the detector system, and an adjusting module 43 for adjusting the protection strategy of the reactor based on the signal.
The generating module 42, when generating the signal according to the detection result of the detector system, is specifically configured to: when the detection result of the detector system is higher than a first fixed value, the first signal is continuously generated, and when the detection result of the detector system is lower than the first fixed value, the first signal is stopped being generated, wherein the first fixed value indicates that the detector system is switched to the intermediate range detector; the second signal is continuously generated when the detection result of the detector system is higher than a second constant value, and the second signal is stopped when the detection result of the detector system is lower than the second constant value, wherein the second constant value indicates that the power of the reactor leaves the detection range of the source range detector of the detector system.
The adjusting module 43 is specifically configured to, when adjusting the protection strategy of the reactor according to the signal: when a second signal appears in the signals, automatically turning off the power supply of the source range detector, and automatically turning off the first protection function; when a first signal in the signals disappears, automatically starting a power supply of the source range detector, and automatically starting a first protection function; when the first protection function is started, the reactor is allowed to automatically stop when the source range multiplication period is smaller than the corresponding preset value.
The specific details of the operation of each module in the protection system of the reactor can refer to the above description of the reactor protection method, and are not described herein again.
In some embodiments, the adjusting module 43 is specifically configured to: when the first signal in the signals disappears, the power supply of the source range detector is automatically turned on, and the first protection function of the reactor is turned on, and the first protection function comprises the following steps: when a first signal in the signals disappears, automatically turning on the power supply of the source range detector, and turning on a first protection function after the power supply of the source range detector has been turned on for a first preset time, wherein the first preset time is the time required for the power supply of the source range detector to reach a stable state from turning on.
In some embodiments, the generation module 42 is further configured to: when the detection result of the detector system is higher than a third fixed value, the third signal is continuously generated, and when the detection result of the detector system is lower than the third fixed value, the third signal is stopped being generated, wherein the third fixed value indicates that the detector system is switched to the power range detector; the fourth signal is continuously generated when the detection result of the detector system is higher than a fourth fixed value, and the fourth signal is stopped when the detection result of the detector system is lower than the fourth fixed value, wherein the fourth fixed value indicates that the intermediate range detector can be turned off.
Accordingly, the adjusting module 43 is further configured to: when a fourth signal appears in the signals, automatically turning off the power supply of the intermediate range detector and automatically turning off the second protection function; when the third signal in the signals disappears, automatically starting the power supply of the intermediate range detector and automatically starting the second protection function; when the second protection function is started, the reactor is allowed to automatically stop when the multiplication period of the intermediate range is smaller than the corresponding preset value.
In some embodiments, the adjusting module 43 is specifically configured to: automatically turning on power to the mid-range detector when a third one of the signals disappears, and automatically turning on the second protection function includes: and when a third signal in the signals disappears, automatically starting the power supply of the intermediate range detector, and starting a second protection function after the power supply of the source range detector is started for a second preset time, wherein the second preset time is the time required by the power supply of the intermediate range detector from starting to reaching a stable state.
In some embodiments, the adjustment module 43 is further configured to: when a third signal appears in the signals, the power supply of the source range detector and the source range short-period protection function of the reactor are kept in a closed state.
In some embodiments, the adjustment module 43 is further configured to: and continuously keeping the power supply and the first protection function of the source range detector in the off state within a third preset time from disappearance of a third signal in the signals, wherein the third preset time is the time from the power supply of the intermediate range detector being turned on to the time when the first signal and/or the second signal can be generated according to the detection result of the detector system.
In some embodiments, the adjustment module 43 is further configured to: when the fourth signal does not appear in the signals, closing the third protection function; and when a fourth signal appears in the signals, starting a third protection function, wherein when the third protection function is started, the reactor is allowed to automatically stop when the flow power ratio of the first loop/the second loop is lower than a corresponding preset value.
In some embodiments, the generation module 42 is further configured to: when the detection result of the detector system is higher than the fifth fixed value, continuously generating a fifth signal; and stopping generating the fifth signal when the detection result of the detector system is lower than a fifth constant value, wherein the fifth constant value is 25% of nuclear heating power of the reactor.
Accordingly, the adjusting module 43 is further configured to: and activating a fourth protection function when a fifth signal is present in the signals, wherein the fourth protection function, when activated, allows the reactor to automatically shutdown when the turbine bypass bleed system is not available.
In some embodiments, the generation module 42 is specifically configured to: the signal is generated using two out of four logic.
There is also provided, in accordance with an embodiment of the present application, a computer-readable storage medium, referring to fig. 5, having stored thereon computer instructions 51, the computer instructions 51, when executed by a computer, implementing the method of protection of a reactor as described in any of the above embodiments.
A computer-readable storage medium refers to any type of physical memory that can store information or data readable by a processor. Thus, a computer-readable storage medium may store instructions for execution by one or more processors, including instructions for causing a processor to perform steps or stages consistent with embodiments described herein. Computer-readable media include both nonvolatile and volatile media, and removable and non-removable media, where information storage may be implemented in any method or technology. The information may be modules of computer readable instructions, data structures and programs, or other data. Examples of non-transitory computer readable media include, but are not limited to: phase change random access memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape or disk storage or other magnetic storage devices, cache, registers, or any other non-transmission medium that can be used to store information that can be accessed by a computer device. Computer-readable storage media are non-transitory and do not include transitory media such as modulated data signals and carrier waves.
Although examples and features of the disclosed principles are described herein, modifications, adaptations, and other implementations can be made without departing from the spirit and scope of the disclosed embodiments. Furthermore, the terms "comprising," "having," "including," and "comprising," and other similar forms, are intended to be equivalent in meaning and open ended, and one or more items following any one of these terms are not intended to be an exhaustive list of such one or more items, nor are they intended to be limited to only the listed one or more items. It must also be noted that, as used herein and in the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise.
It is to be understood that the present application is not limited to the precise arrangements described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope of the present application. It is intended that the scope of the application be limited only by the claims appended hereto.
Claims (11)
1. A method of protecting a reactor, comprising:
receiving a detection result of the reactor power detected by the detector system;
generating a signal based on the detection result of the detector system,
adjusting a protection strategy of the reactor based on the signal, wherein,
the generating a signal according to the detection result of the detector system comprises:
continuously generating a first signal when the detection result of the detector system is higher than a first certain value, and stopping generating the first signal when the detection result of the detector system is lower than the first certain value, wherein the first certain value indicates that the detector system has switched to a middle-range detector;
continuously generating a second signal when the detection result of the detector system is above a second constant value, ceasing to generate the second signal when the detection result of the detector system is below the second constant value, the second constant value indicating that the power of the reactor has left the detection range of a source range detector of the detector system;
the adjusting the protection strategy of the reactor according to the signal comprises:
automatically turning off power to the source range detector and automatically turning off a first protection function when the second signal is present in the signal;
automatically turning on the power of the source range detector and automatically turning on the first protection function when the first one of the signals disappears; when the first protection function is started, the reactor is allowed to automatically stop when the source range multiplication period is smaller than the corresponding preset value.
2. The method of claim 1 wherein automatically turning on power to the source range detector when the first one of the signals disappears and turning on a first protection function of the reactor comprises:
when the first signal in the signals disappears, automatically turning on the power supply of the source range detector, and after the power supply of the source range detector has been turned on for a first preset time, turning on the first protection function, wherein the first preset time is the time required for the power supply of the source range detector to reach a steady state from turning on.
3. The method of claim 1 or 2, wherein the generating a signal from the detection of the detector system further comprises:
continuously generating a third signal when the detection result of the detector system is above a third constant value, and stopping generating the third signal when the detection result of the detector system is below the third constant value, wherein the third constant value indicates that the detector system has switched to a power range detector;
continuously generating a fourth signal when the detection result of the detector system is above a fourth constant value, ceasing to generate the fourth signal when the detection result of the detector system is below the fourth constant value, the fourth constant value indicating that the mid-range detector has been enabled to be turned off;
said adjusting a protection strategy of said reactor in accordance with said signal further comprises:
automatically turning off power to the mid-range detector and automatically turning off a second protection function when the fourth signal is present in the signal;
automatically turning on power to the mid-range detector and automatically turning on the second protection function when the third one of the signals disappears; when the second protection function is started, the reactor is allowed to automatically stop when the multiplication period of the intermediate range is smaller than the corresponding preset value.
4. The method of claim 3 wherein automatically turning on power to the mid-range detector when the third one of the signals disappears and automatically turning on the second protection function comprises:
and when the third signal in the signals disappears, automatically turning on the power supply of the intermediate range detector, and turning on the second protection function after the power supply of the source range detector has been turned on for a second preset time, wherein the second preset time is the time required for the power supply of the intermediate range detector to reach a stable state from turning on.
5. The method of claim 3 or 4, wherein said adjusting a protection strategy of the reactor according to the signal further comprises:
and when the third signal appears in the signals, keeping the power supply of the source range detector and the source range short-period protection function of the reactor in a closed state.
6. The method of claim 5, wherein said adjusting a protection strategy of the reactor in accordance with the signal further comprises:
and continuously keeping the power supply of the source range detector and the first protection function in the off state within a third preset time from disappearance of the third signal in the signals, wherein the third preset time is the time from the power supply of the intermediate range detector being turned on to the time when the first signal and/or the second signal can be generated according to the detection result of the detector system.
7. The method of claim 3 or 4, wherein said adjusting a protection strategy of the reactor according to the signal further comprises:
turning off a third protection function when the fourth signal is not present in the signals;
and when the fourth signal appears in the signals, starting the third protection function, wherein when the third protection function is started, the reactor is allowed to automatically stop when the flow power ratio of the first loop/the second loop is lower than a corresponding preset value.
8. The method of claim 1, wherein the generating a signal from the detection of the detector system comprises:
when the detection result of the detector system is higher than a fifth fixed value, continuously generating a fifth signal; stopping generating the fifth signal when the detection result of the detector system is lower than a fifth constant value, wherein the fifth constant value is 25% of nuclear heating power of the reactor;
said adjusting a protection strategy of said reactor in accordance with said signal further comprises:
activating a fourth protection function when said fifth signal is present in said signals, wherein said fourth protection function, when activated, allows said reactor to automatically shutdown when a turbine bypass exhaust system is not available.
9. The method of claim 1, wherein generating a signal from the detection results of the detector system uses two-out-of-four logic to generate the signal.
10. A protection system for a reactor, comprising:
the receiving module is used for receiving the detection result of the detector system for detecting the power of the reactor;
a generating module for generating a signal in dependence of a detection result of the detector system,
an adjustment module for adjusting a protection strategy of the reactor in dependence of the signal, wherein,
the generating module, when generating a signal according to a detection result of the detector system, is specifically configured to:
continuously generating a first signal when the detection result of the detector system is higher than a first certain value, and stopping generating the first signal when the detection result of the detector system is lower than the first certain value, wherein the first certain value indicates that the detector system has switched to a middle-range detector;
continuously generating a second signal when the detection result of the detector system is higher than a second constant value, and stopping generating the second signal when the detection result of the detector system is lower than the second constant value, wherein the second constant value indicates that the power of the reactor leaves the detection range of a source-range detector of the detector system;
the adjusting module is specifically configured to, when adjusting the protection strategy of the reactor according to the signal:
automatically turning off power to the source range detector and automatically turning off a first protection function when the second signal is present in the signal;
automatically turning on the power of the source range detector and automatically turning on the first protection function when the first one of the signals disappears; when the first protection function is started, the reactor is allowed to automatically stop when the source range multiplication period is smaller than the corresponding preset value.
11. A computer-readable storage medium having stored thereon computer instructions which, when executed by a computer, implement the method of any one of claims 1-9.
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