CN114822884B - Single-reactor double-shutdown circuit breaker system and method thereof - Google Patents
Single-reactor double-shutdown circuit breaker system and method thereof Download PDFInfo
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- CN114822884B CN114822884B CN202210508927.0A CN202210508927A CN114822884B CN 114822884 B CN114822884 B CN 114822884B CN 202210508927 A CN202210508927 A CN 202210508927A CN 114822884 B CN114822884 B CN 114822884B
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000000470 constituent Substances 0.000 description 7
- 230000010354 integration Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C7/00—Control of nuclear reaction
- G21C7/36—Control circuits
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C9/00—Emergency protection arrangements structurally associated with the reactor, e.g. safety valves provided with pressure equalisation devices
- G21C9/02—Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse; Control elements having arrangements activated in an emergency
Abstract
The invention discloses a single-pile double-shutdown circuit breaker system and a method thereof. Aiming at the Shan Dui double-shutdown breaker system, the system of the single-reactor double-shutdown breaker screen is integrated from two layers of signal driving and signal feedback, so that high reliability of shutdown driving and high reliability of signal feedback are realized.
Description
Technical Field
The invention belongs to the technical field of nuclear safety control, and particularly relates to a single-reactor double-shutdown circuit breaker system and a method for realizing shutdown driving logic and shutdown state integration based on the system.
Background
In the technical field of nuclear safety, a set of shutdown circuit breakers are generally configured in a nuclear reactor to realize shutdown driving of the nuclear reactor.
However, there is currently a higher requirement for the safety of nuclear reactors for which two shutdown systems are configured. For this new demand, new design considerations need to be made in shutdown driving and shutdown state integration.
Disclosure of Invention
The invention provides a single-reactor double-shutdown circuit breaker system, which aims at the prior technology of configuring a set of shutdown circuit breakers in a nuclear reactor. According to the invention, a set of shutdown breaker screens are respectively arranged for each set of shutdown system, so that the higher safety requirement of the nuclear reactor is met.
The invention is realized by the following technical scheme:
a single-reactor double-shutdown breaker system is characterized in that two shutdown breaker screens are configured in a single reactor, and each shutdown breaker screen corresponds to one shutdown system.
As a preferred embodiment, each set of shutdown circuit breaker screens of the invention consists of 3 screens, the 3 screens respectively correspond to 3 driving signal channels of the shutdown system, and each screen is provided with 2 circuit breakers.
As a preferred implementation mode, 6 breakers in each shutdown breaker panel adopt a parallel-series architecture, namely, the 6 breakers are connected in parallel to form 3 series joints, and the 3 series joints are sequentially connected in series; and the two circuit breakers in each serial link correspond to different driving signal channels respectively.
In a second aspect, the present invention provides a signal driving method based on the Shan Dui dual shutdown circuit breaker system, including: one set of shutdown driving signals acts on the corresponding shutdown breaker panel and also acts on the other set of shutdown breaker panels in a crossing manner.
In a third aspect, the present invention provides a signal feedback method based on the Shan Dui dual shutdown circuit breaker system, including:
respectively acquiring the overall on-off states of two shutdown circuit breaker screens;
and taking the total on-off state signals of the two shutdown circuit breaker screens as OR logic, and sending the logic result as shutdown state signals to each related system.
As a preferred implementation manner, the method respectively obtains the overall on-off states of two sets of shutdown circuit breaker screens, specifically: and respectively carrying out three-out-two logic combination on 6 breaker state signals of each shutdown breaker panel, wherein the logic result represents the overall on-off state of the shutdown breaker panel.
As a preferred embodiment, the OR logic of the present invention requires that the signal contacts be closed for a first type of shutdown status signal to indicate shutdown, using a series-parallel model.
As a preferred embodiment, the serial-parallel model of the present invention specifically includes: the normally-closed contacts of at least two different relays of the first set of shutdown state signal expansion are connected in series, and the normally-closed contacts of at least two different relays of the second set of shutdown state signal expansion are connected in series; two series results were connected in parallel.
As a preferred embodiment, the OR logic of the present invention requires that the signal contacts open to indicate shutdown for the second type of shutdown status signal, using a parallel-series model.
As a preferred embodiment, the parallel-serial model of the present invention is specifically: normally open contacts of at least two different relays of the first set of shutdown state signal expansion are connected in parallel, and normally open contacts of at least two different relays of the second set of shutdown state signal expansion are connected in parallel; two parallel results were connected in series.
The invention has the following advantages and beneficial effects:
the invention improves the safety and reliability of the nuclear reactor by adopting the design of the single-reactor double-shutdown breaker system.
The invention aims at a single-reactor double-shutdown breaker system, and adopts a cross driving technology, namely, each set of shutdown driving signals drives a corresponding shutdown breaker screen and drives another set of shutdown breaker screen. Any one of the two sets of shutdown drivers is completely failed, and the other set of drivers can also enable the two sets of shutdown breaker screens to be successfully disconnected, so that the safety of the nuclear reactor is improved.
The invention aims at a single-reactor double-shutdown circuit breaker system, and aims at representing the total shutdown state, and the total shutdown state is represented by taking or logically representing shutdown state signals of two sets of shutdown circuit breaker screens. The shutdown status signal is the most important signal interface of the reactor, the reliability of the signal interface is related to the reliability of the linkage of each related system after emergency shutdown, and therefore, the signal interface circuit needs to be reliably designed. There are two types of defined requirements for the shutdown signal interface by the associated system, the first type being contact closed to indicate an emergency shutdown state and the second type being contact open to indicate an emergency shutdown state. For the first class, a serial-parallel signal redundancy mode is adopted, and for the second class, a parallel-serial signal redundancy mode is adopted. Through redundancy design measures, the total shutdown state signal can be reliably sent out under the condition of single interface device faults, and the linkage signal can be reliably obtained by the related system after emergency shutdown.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention. In the drawings:
fig. 1 is a schematic diagram of a system structure according to an embodiment of the present invention.
Fig. 2 is a schematic block diagram of system feedback signal integration according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of two types of shutdown state signal redundancy design in accordance with an embodiment of the present invention.
Detailed Description
Hereinafter, the terms "comprises" or "comprising" as may be used in various embodiments of the present invention indicate the presence of inventive functions, operations or elements, and are not limiting of the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the invention, the terms "comprises," "comprising," and their cognate terms are intended to refer to a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be interpreted as first excluding the existence of or increasing likelihood of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the invention, the expression "or" at least one of a or/and B "includes any 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.
Expressions (such as "first", "second", etc.) used in the various embodiments of the invention may modify various constituent elements in the various embodiments, but the respective constituent elements may not be limited. For example, the above description does not limit the order and/or importance of the elements. The above description is only intended to distinguish one element from another element. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: if it is described to "connect" one component element to another component element, a first component element may be directly connected to a second component element, and a third component element may be "connected" between the first and second component elements. Conversely, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. As used herein, the singular is intended to include the plural as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the invention belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is the same as the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in connection with the various embodiments of the invention.
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
Examples
The embodiment provides a single-reactor double-shutdown circuit breaker system, wherein two shutdown systems are configured in a single reactor, and each shutdown system is provided with a shutdown circuit breaker screen.
Each shutdown circuit breaker screen consists of 3 screens, the 3 screens respectively correspond to three driving signal channels of the shutdown system, and each screen is provided with 2 circuit breakers.
The 6 breakers in each shutdown breaker panel are combined in a parallel-serial three-out-two total architecture mode, namely, the 6 breakers are connected in parallel in pairs to form 3 serial joints, and the 3 serial joints are sequentially connected in series; and the driving signal channels corresponding to the two circuit breakers in each serial link are different.
As shown in fig. 1, the first set of shutdown circuit breaker panels in this embodiment includes 3 panels, each panel is provided with two columns of circuit breakers a/B, the panel No. 1 (i.e. 1A/1B) corresponds to a 1-channel drive, the panel No. 2 (i.e. 2A/2B) corresponds to a 2-channel drive, and the panel No. 3 (i.e. 3A/3B) corresponds to a 3-channel drive; the first set of shutdown circuit breaker screen of this embodiment comprises first series connection festival, second series connection festival and third series connection festival, and wherein, the 1A circuit breaker of No. 1 screen and the 2B circuit breaker of No. 2 screen are parallelly connected to constitute first series connection festival, and the 2A circuit breaker of No. 2 screen and the 3B circuit breaker of No. 3 screen constitute the second series connection festival, and the 3A circuit breaker of No. 3 screen and the 1B circuit breaker of No. 1 screen are parallelly connected to constitute the third series connection festival.
The second set of shutdown circuit breaker screens in the embodiment comprises 3 screens, each screen is provided with a/b two-column circuit breakers, a No. 1 screen (namely 1a/1 b) corresponds to 1-channel driving, a No. 2 screen (namely 2a/2 b) corresponds to 2-channel driving, and a No. 3 screen (namely 3a/3 b) corresponds to 3-channel driving; the second set of shutdown circuit breaker screens of the embodiment is formed by connecting three series-connected joints in series; the first serial connection joint is formed by connecting a 1a breaker of a No. 1 screen and a 2b breaker of a No. 2 screen in parallel, the second serial connection joint is formed by connecting a 2a breaker of a No. 2 screen and a 3b breaker of a No. 3 screen, and the third serial connection joint is formed by connecting a 3a breaker of a No. 3 screen and a 1b breaker of a No. 1 screen in parallel.
Aiming at the Shan Dui double-shutdown breaker system, the embodiment starts from two links of signal driving and signal feedback respectively, and performs system integration of two sets of shutdown breaker screens of single-stack configuration, thereby realizing the high reliability targets of driving and feedback.
The signal driving of the single-reactor double-shutdown breaker panel is realized by adopting a cross driving mode, namely, each set of shutdown driving signals acts on the corresponding shutdown breaker panel and also acts on the other set of shutdown breaker panel in a cross manner, and the signal driving is particularly shown in fig. 1.
The first set of shutdown drive signals are applied to both the first set of shutdown circuit breaker screens and the second set of shutdown circuit breaker screens. For example, a 1-channel drive signal of a first set of shutdown drive signals acts on both a corresponding 1A breaker of screen 1 of the first set of shutdown breaker screens and a 1A breaker of screen 1 of the second set of shutdown breaker screens.
The second set of shutdown driving signals are applied to the second set of shutdown circuit breaker screens and are simultaneously cross-applied to the first set of shutdown circuit breaker screens. For example, the 1-channel drive signal of the second set of shutdown drive signals acts on both the corresponding 1A breaker of screen 1 of the second set of shutdown breaker screens and the corresponding 1A breaker of screen 1 of the first set of shutdown breaker screens.
The 1A circuit breaker for screen 1 of the first set of shutdown circuit breaker screens is logically or controlled by the 1-channel drive signal 1A of the first set of shutdown drive signals and the 1-channel drive signal 1A of the second set of shutdown drive signals. And similarly, each breaker is controlled by two sets of shutdown signal logic OR, so that when any one set of shutdown driving signals fails, the other set of shutdown driving signals can independently disconnect the two sets of shutdown breaker screens, and the high reliability of shutdown driving is ensured from the system level.
Auxiliary contacts of 6 breakers in each shutdown breaker panel are combined and connected in a three-out-two combination mode of main contacts of the auxiliary contacts, so that the overall on-off state of the shutdown breaker panel is represented. And then taking OR logic of the total on-off state combined signals of the two shutdown circuit breaker screens, and sending the logic result as shutdown state signals to each related system.
Specifically, as shown in fig. 2, in this embodiment, the three-out-of-two logic combinations are performed on the 6 breaker status signals in the first set of shutdown breaker screens, the output logic results are expanded (the expansion number is determined according to the number of related systems, for example, the expansion number is 11 paths of signals in fig. 2), the three-out-of-two logic combinations are performed on the 6 breaker status signals in the second set of shutdown breaker screens, the output logic results are expanded, and finally, the logical output results of the two sets of shutdown breaker screens are subjected to or logic operation, and the or logic operation results are used as the total shutdown status signals and are sent to each related system.
The shutdown state signal of the first type requires that the signal contacts be closed to indicate shutdown and the shutdown state signal of the second type requires that the signal contacts be opened to indicate shutdown, taking into account the different shutdown state signal on-off definitions required by each relevant system. Meanwhile, in order to ensure that the sent shutdown state signal has high reliability, the shutdown state can still be correctly sent out when a single device fails, the embodiment adopts redundancy design measures, namely contacts in a model come from different relays, and the sent shutdown state signal is still valid when the single relay fails.
Specifically, as shown in fig. 3, in this embodiment, for the first kind of shutdown state signal, a series-parallel model is adopted for the or logic operation of the two sets of shutdown state signals, that is, the normally-closed contacts of the two (or more) different relays of the first set of shutdown state signal expansion are connected in series, the normally-closed contacts of the two (or more) different relays of the second set of shutdown state signal expansion are connected in series, and finally, the two series results are connected in parallel.
In the embodiment, aiming at the second type of shutdown state signals, a parallel-series model is adopted for OR logic operation of the two sets of shutdown state signals, namely normally open contacts of two different relays of the first set of shutdown state signals are connected in parallel, normally open contacts of two different relays of the second set of shutdown state signals are connected in parallel, and finally, two parallel results are connected in series.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (7)
1. A single-pile double-shutdown circuit breaker system is characterized in that two sets of shutdown circuit breaker screens are configured in a single pile, and each set of shutdown circuit breaker screen corresponds to one set of shutdown system respectively; each set of shutdown circuit breaker screen consists of 3 screens, the 3 screens respectively correspond to 3 driving signal channels of the shutdown system, and each screen is provided with 2 circuit breakers; the 6 breakers in each shutdown breaker panel adopt a parallel-series architecture, namely, the 6 breakers are connected in parallel in pairs to form 3 series joints, and the 3 series joints are sequentially connected in series; the two circuit breakers in each serial joint correspond to different driving signal channels respectively;
one set of shutdown driving signals acts on the corresponding shutdown breaker panel and also acts on the other set of shutdown breaker panels in a crossing manner.
2. The signal feedback method based on the single-reactor double-shutdown circuit breaker system as claimed in claim 1, comprising the following steps:
respectively acquiring the overall on-off states of two shutdown circuit breaker screens;
and taking the total on-off state signals of the two shutdown circuit breaker screens as OR logic, and sending the logic result as shutdown state signals to each related system.
3. The signal feedback method according to claim 2, wherein the overall on-off states of the two shutdown circuit breaker panels are respectively obtained, specifically:
and respectively carrying out three-out-two logic combination on 6 breaker state signals of each shutdown breaker panel, wherein the logic result represents the overall on-off state of the shutdown breaker panel.
4. The signal feedback method of claim 2, wherein the or logic requires signal contact closure for a first type of shutdown status signal to indicate shutdown, using a series-parallel model.
5. The signal feedback method according to claim 4, wherein the series-parallel model is specifically:
the normally-closed contacts of at least two different relays of the first set of shutdown state signal expansion are connected in series, and the normally-closed contacts of at least two different relays of the second set of shutdown state signal expansion are connected in series;
two series results were connected in parallel.
6. The signal feedback method of any of claims 2-4, wherein the or logic requests that signal contacts open for a second type of shutdown status signal to indicate shutdown, using a parallel-series model.
7. The signal feedback method according to claim 6, wherein the parallel-series model is specifically:
normally open contacts of at least two different relays of the first set of shutdown state signal expansion are connected in parallel, and normally open contacts of at least two different relays of the second set of shutdown state signal expansion are connected in parallel;
two parallel results were connected in series.
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