Heavy water reactor operation transient rapid identification method and device

Abstract

The invention belongs to the technical field of nuclear power, and particularly relates to a heavy water reactor operation transient rapid identification method and device. According to the heavy water reactor nuclear power station transient statistical method provided by the invention, the rapid identification and classification of the operation transient state of the reactor primary loop system can be effectively realized. All the processes are obtained and compared through objective data, the calculation result is reliable, transient rapid identification and automatic classification of the nuclear power station can be effectively achieved, the problem that transient omission and classification errors are likely to be caused by identification and classification in a general manual mode at present is solved, and the probability of human errors is greatly reduced. Therefore, the real-time monitoring of the nuclear power station and the rapid linkage of the operation transient state are realized.

Description

Technical Field

[0001] The present invention belongs to the field of nuclear power technology, and in particular relates to a method and device for rapid identification of transient states of heavy water reactor operation. Background Art

[0002] Generally speaking, transient can be expressed as a special operating state of the system or equipment of a nuclear power plant. When this state occurs, the relevant parameters of the system or equipment change sharply and drastically, causing these changes to reach the limits required by the nuclear power plant design documents to be recorded and tracked. Typical transients include shutdown, power change, temperature rise and fall, pressure test, power failure test, etc. In order to grasp the operating state of key systems in nuclear power plants, the sum of related activities such as statistics and classification of the operating conditions of the system within various prescribed ranges is defined as transient management. The transient limit refers to the number of shocks caused by transients, tests, etc. that the system of a nuclear power plant can withstand. This limit is dominated by factors such as the operating experience of similar nuclear power plants, system design operating conditions, and equipment manufacturing conditions, and is determined by the design safety personnel of the unit while retaining a certain margin.

[0003] During the operation of a heavy water reactor nuclear power plant, the system will experience a large number of transients. Since a large amount of data (such as monitoring temperature and pressure at different locations) is generated during the operation of a nuclear power plant, these data are stored and managed through the PI system. Currently, the transient management of heavy water reactor nuclear power plants is mainly carried out by manual statistics, which may lead to errors in transient classification due to human error and is inefficient, reducing the overall management efficiency of the nuclear power plant. Summary of the invention

[0004] In order to overcome the problems existing in the related art, a method and device for rapid identification of transient state of operation of a heavy water reactor are provided.

[0005] According to one aspect of an embodiment of the present disclosure, a method for rapid identification of transient state of operation of a heavy water reactor is provided, the method comprising:

[0006] Step 101, obtaining the nuclear power plant operation parameters through the nuclear power plant PI system, and obtaining the operator records through the nuclear power plant operating system to form key data, the key data including: reactor power, main pump speed, temperature at key locations, pressure at key locations, flow at key locations, and valve switch status;

[0007] Step 102, when the change states of the multiple continuously changing key data meet the transient judgment condition, mark the multiple continuously changing key data as operation transient data, and mark the states corresponding to the multiple continuously changing key data as operation transient;

[0008] Step 103, extracting the power value at the beginning of the transient state and the power value at the end of the transient state, as well as the temperature, pressure, and flow value in the transient state from the operation transient data;

[0009] Step 104, comparing the extracted power values ​​at the beginning of the transient and the power values ​​at the end of the transient with the power values ​​at the beginning of each design transient and the power values ​​at the end of each design transient in the transient database for similarity, and taking the top N design transients ranked from large to small in similarity as a design transient set, where N is a positive integer greater than 1;

[0010] Step 105 , the temperature, pressure, and flow values ​​in the extracted transient are compared with the temperature, pressure, and flow values ​​of various design transients in the design transient set for similarity, and the type of the design transient with the greatest similarity is taken as the type of the operating transient.

[0011] In a possible implementation, step 105 further includes:

[0012] Step 1051, comparing the temperature, pressure, and flow values ​​in the extracted transient with the temperature, pressure, and flow values ​​of various design transients in the design transient set to obtain multiple similarities;

[0013] Step 1052: if some of the similarities among the multiple similarities exceed the similarity threshold, the type of the design transient with the greatest similarity is used as the type of the operation transient;

[0014] Step 1053: If the multiple similarities all exceed the similarity threshold, the running transient is marked as a new type and updated to the transient database.

[0015] In a possible implementation, the method further includes:

[0016] Step 107: If the operation transient is classified as a type of a design transient, the operation transient and its corresponding operation transient data are added to the transient database; and when the similarity of the design transient of this type is compared with other operation transients, the design transient data of the design transient of this type and the operation transient data of the operation transient are respectively calculated for similarity.

[0017] In a possible implementation, the transient judgment condition in step 102 includes:

[0018] The reactor power, valve position, main pump status, etc. among multiple continuously changing key data change; or

[0019] The temperature or pressure fluctuation range of multiple continuously changing key data exceeds the threshold.

[0020] According to one aspect of an embodiment of the present disclosure, a device for rapid identification of transient operation of a heavy water reactor is provided, the device comprising:

[0021] The acquisition module is used to obtain the operation parameters of the nuclear power plant through the PI system of the nuclear power plant, and obtain the operator records through the nuclear power plant operating system to form key data. The key data include: reactor power, main pump speed, temperature at key locations, pressure at key locations, flow at key locations, and valve switch status;

[0022] A judgment module, used for marking the multiple continuously changing key data as operation transient data and marking the state corresponding to the multiple continuously changing key data as operation transient when the change state of the multiple continuously changing key data meets the transient judgment condition;

[0023] An extraction module, used to extract the power value at the beginning of the transient state and the power value at the end of the transient state, as well as the temperature, pressure and flow value in the transient state from the operation transient data;

[0024] A first comparison module is used to compare the extracted power value at the beginning of the transient and the power value at the end of the transient with the power values ​​at the beginning of each design transient and the power values ​​at the end of each design transient in the transient database for similarity, and to take the top N design transients ranked from large to small in similarity as the design transient set, where N is a positive integer greater than 1;

[0025] The second comparison module is used to compare the temperature, pressure and flow values ​​in the extracted transient with the temperature, pressure and flow values ​​of various design transients in the design transient set for similarity, and take the type of the design transient with the greatest similarity as the type of the operating transient.

[0026] According to another aspect of an embodiment of the present disclosure, a device for rapid identification of transient state of operation of a heavy water reactor is provided, the device comprising:

[0027] processor;

[0028] a memory for storing processor-executable instructions;

[0029] Wherein, the processor is configured to execute the above method.

[0030] According to another aspect of an embodiment of the present disclosure, a non-volatile computer-readable storage medium is provided, on which computer program instructions are stored, and the computer program instructions implement the above method when executed by a processor.

[0031] The beneficial effect of the present disclosure is that the transient statistical method of the heavy water reactor nuclear power plant provided by the present disclosure can effectively realize the rapid identification and classification of the operating transient of the reactor primary loop system. All processes are obtained and compared through objective data, and the calculation results are reliable. It can effectively realize the rapid identification and automatic classification of nuclear power plant transients, solve the problem that the current identification and classification by generalizing the manual method easily leads to transient omissions and classification errors, and greatly reduce the probability of human error. In this way, real-time monitoring of nuclear power plants and rapid linkage of operating transients are realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a flow chart of a method for rapid identification of transient conditions in heavy water reactor operation shown in an embodiment of the present disclosure.

[0033] Figure 2 It is a block diagram of a device for rapid identification of transient operation of a heavy water reactor shown in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] The present disclosure is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] Unless otherwise defined, the technical and scientific terms used in the present disclosure have the same meanings as those generally understood by those skilled in the art to which the present disclosure belongs; the terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the term "including" and any variations thereof in the present disclosure are intended to cover non-exclusive inclusions. Obviously, the embodiments described in the present disclosure are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative efforts are within the scope of protection of the present disclosure.

[0036] Reference to "embodiments" in this disclosure means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the disclosure. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] Figure 1 1 is a flowchart of a method for rapid identification of transient operation of a heavy water reactor shown in an embodiment of the present disclosure. The method can be executed by a terminal device, wherein the terminal device can be a server, a desktop computer, a laptop computer, etc. The embodiment of the present disclosure does not limit the type of terminal device. Figure 1 As shown, the method includes:

[0038] Step 101, obtain the nuclear power plant operating parameters through the nuclear power plant PI system, and obtain the operator records through the nuclear power plant operating system to form key data. The key data may include: reactor power, main pump speed, temperature at key locations, pressure at key locations, flow at key locations, and valve switch status.

[0039] Step 102 : when the change states of the multiple continuously changing key data meet the transient judgment condition, mark the multiple continuously changing key data as operation transient data, and mark the states corresponding to the multiple continuously changing key data as operation transient.

[0040] For example, the transient judgment conditions in step 102 include: changes in reactor power, valve position, main pump status, etc. among multiple continuously changing key data; or temperature or pressure fluctuation ranges among multiple continuously changing key data exceed thresholds.

[0041] Step 103: extracting the power value at the beginning of the transient state and the power value at the end of the transient state, as well as the temperature, pressure, and flow values ​​during the transient state from the operation transient data.

[0042] In step 104, the extracted power value at the beginning of the transient and the power value at the end of the transient are compared with the power values ​​at the beginning and the power values ​​at the end of each type of design transient in the transient database for similarity, and the top N design transients ranked from large to small in similarity are taken as the design transient set, where N is a positive integer greater than 1. For example, in step 104, for each type of design transient in the transient database, the similarity distance between the power value at the beginning and the power value at the end of the design transient of this type and the extracted power value at the beginning and the power value at the end is determined, and the top N design transients ranked from large to small in similarity distance are taken as the design transient set. It should be noted that the value of N can be selected according to the needs of actual judgment, and similarity calculation models such as Jaccard similarity, Dice similarity, etc. can also be used to compare similarity, which is not limited in the present disclosure.

[0043] Step 105 , the temperature, pressure, and flow values ​​in the extracted transient are compared with the temperature, pressure, and flow values ​​of various design transients in the design transient set for similarity, and the type of the design transient with the greatest similarity is taken as the type of the operating transient.

[0044] In this way, the present invention first compares the similarity of the power values ​​at the beginning and end of the transient, and preliminarily screens similar design transients, which can quickly determine the preliminary range and reduce the amount of calculation; and further determines the most similar transient type through the temperature, pressure, and flow values ​​in the transient, and performs accurate screening within the scope of the preliminary screening, thereby improving the calculation efficiency and ensuring the accuracy of the classification.

[0045] In a possible implementation, step 105 further includes: step 1051, comparing the temperature, pressure, and flow values ​​in the extracted transient with the temperature, pressure, and flow values ​​of various design transients in the design transient set to obtain multiple similarities;

[0046] Step 1052: if some of the similarities among the multiple similarities exceed the similarity threshold, the type of the design transient with the greatest similarity is used as the type of the operation transient;

[0047] Step 1053: If the multiple similarities all exceed the similarity threshold, the running transient is marked as a new type and updated to the transient database.

[0048] In the second precise screening stage, the present invention separately marks the operating transients whose similarities with other design transients exceed the similarity threshold as new types and updates them to the transient database, no longer sticking to the design data. This makes it more flexible and dynamic to adapt to the actual operation of nuclear power plants and increase the accuracy of transient identification and classification.

[0049] In a possible implementation, the method further includes:

[0050] Step 107: If the operation transient is classified as a design transient type, the operation transient and its corresponding operation transient data are added to the transient database; and when the design transient of this type is compared with other operation transients for similarity, the design transient data of the design transient of this type and the operation transient data of the operation transient are respectively calculated for similarity. This can further increase the accuracy of transient identification and classification.

[0051] Compared with the traditional manual single variable identification method, the heavy water reactor operation transient rapid identification method disclosed in the present invention can comprehensively consider the influence of global parameters on transients, so as to make correct classification judgments, and at the same time, the identified transient results will be used as reference transients for subsequent transient identification processes, and have the function of self-iteration. In addition, all processes in the present method use objective data obtained in real time, and the analysis results are reliable, which can effectively improve the efficiency of transient statistics.

[0052] In a possible implementation, a device for rapid identification of transient state of operation of a heavy water reactor is provided, the device comprising:

[0053] The acquisition module is used to obtain the operation parameters of the nuclear power plant through the PI system of the nuclear power plant, and obtain the operator records through the nuclear power plant operating system to form key data. The key data include: reactor power, main pump speed, temperature at key locations, pressure at key locations, flow at key locations, and valve switch status;

[0054] A judgment module, used for marking the multiple continuously changing key data as operation transient data and marking the state corresponding to the multiple continuously changing key data as operation transient when the change state of the multiple continuously changing key data meets the transient judgment condition;

[0055] An extraction module, used to extract the power value at the beginning of the transient state and the power value at the end of the transient state, as well as the temperature, pressure and flow value in the transient state from the operation transient data;

[0056] A first comparison module is used to compare the extracted power value at the beginning of the transient and the power value at the end of the transient with the power values ​​at the beginning of each design transient and the power values ​​at the end of each design transient in the transient database for similarity, and to take the top N design transients ranked from large to small in similarity as the design transient set, where N is a positive integer greater than 1;

[0057] The second comparison module is used to compare the temperature, pressure and flow values ​​in the extracted transient with the temperature, pressure and flow values ​​of various design transients in the design transient set for similarity, and take the type of the design transient with the greatest similarity as the type of the operating transient.

[0058] The description of the above-mentioned device has been explained in detail in the description of the above-mentioned method, and will not be repeated here.

[0059] Figure 2 1900 is a block diagram of a heavy water reactor operation transient rapid identification device shown in an embodiment of the present disclosure. For example, the device 1900 can be provided as a server. Figure 2 , the apparatus 1900 includes a processing component 1922, which further includes one or more processors, and a memory resource represented by a memory 1932 for storing instructions, such as an application, that can be executed by the processing component 1922. The application stored in the memory 1932 may include one or more modules, each corresponding to a set of instructions. In addition, the processing component 1922 is configured to execute instructions to perform the above method.

[0060] The device 1900 may also include a power supply component 1926 configured to perform power management of the device 1900, a wired or wireless network interface 1950 configured to connect the device 1900 to a network, and an input / output (I / O) interface 1958. The device 1900 may operate based on an operating system stored in the memory 1932, such as Windows Server™, MacOS X™, Unix™, Linux™, FreeBSD™, or the like.

[0061] In an exemplary embodiment, a non-volatile computer-readable storage medium is also provided, such as a memory 1932 including computer program instructions, which can be executed by the processing component 1922 of the device 1900 to perform the above method.

[0062] The present disclosure may be a system, a method and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

[0063] A computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples of computer-readable storage media (a non-exhaustive list) include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination of the foregoing. As used herein, a computer-readable storage medium is not to be interpreted as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through a wire.

[0064] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0065] The computer program instructions for performing the operation of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. Computer-readable program instructions may be executed completely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be customized by utilizing the state information of the computer-readable program instructions, and the electronic circuit may execute the computer-readable program instructions, thereby realizing various aspects of the present disclosure.

[0066] Various aspects of the present disclosure are described herein with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer-readable program instructions.

[0067] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine, so that when these instructions are executed by the processor of the computer or other programmable data processing device, a device that implements the functions / actions specified in one or more boxes in the flowchart and / or block diagram is generated. These computer-readable program instructions can also be stored in a computer-readable storage medium, and these instructions cause the computer, programmable data processing device, and / or other equipment to work in a specific manner, so that the computer-readable medium storing the instructions includes a manufactured product, which includes instructions for implementing various aspects of the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0068] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device so that a series of operating steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to implement the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0069] The flow chart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to multiple embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a part of a module, program segment or instruction, and a part of the module, program segment or instruction includes one or more executable instructions for realizing the specified logical function. In some alternative implementations, the function marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two continuous square boxes can actually be executed substantially in parallel, and they can sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs the specified function or action, or can be implemented with a combination of special hardware and computer instructions.

[0070] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A method for rapid identification of transient state of heavy water reactor operation, characterized in that: The method comprises: Step 101, obtaining the nuclear power plant operation parameters through the nuclear power plant PI system, and obtaining the operator records through the nuclear power plant operating system to form key data, the key data including: reactor power, main pump speed, temperature at key locations, pressure at key locations, flow at key locations, and valve switch status; Step 102, when the change states of the multiple continuously changing key data meet the transient judgment condition, mark the multiple continuously changing key data as operation transient data, and mark the states corresponding to the multiple continuously changing key data as operation transient; Step 103, extracting the power value at the beginning of the transient state and the power value at the end of the transient state, as well as the temperature, pressure, and flow value in the transient state from the operation transient data; Step 104, comparing the extracted power values ​​at the beginning of the transient and the power values ​​at the end of the transient with the power values ​​at the beginning of each design transient and the power values ​​at the end of each design transient in the transient database for similarity, and taking the top N design transients ranked from large to small in similarity as a design transient set, where N is a positive integer greater than 1; Step 105 , the temperature, pressure, and flow values ​​in the extracted transient are compared with the temperature, pressure, and flow values ​​of various design transients in the design transient set for similarity, and the type of the design transient with the greatest similarity is taken as the type of the operating transient.

2. The method according to claim 1, characterized in that Step 105 also includes: Step 1051, comparing the temperature, pressure, and flow values ​​in the extracted transient with the temperature, pressure, and flow values ​​of various design transients in the design transient set to obtain multiple similarities; Step 1052: if some of the similarities among the multiple similarities exceed the similarity threshold, the type of the design transient with the greatest similarity is used as the type of the operation transient; Step 1053: If multiple similarities all exceed the similarity threshold, the running transient is marked separately as a new type and updated to the transient database.

3. The method according to claim 1, characterized in that The method further comprises: Step 107: If the operation transient is classified as a type of a design transient, the operation transient and its corresponding operation transient data are added to the transient database; and when the similarity of the design transient of this type is compared with other operation transients, the design transient data of the design transient of this type and the operation transient data of the operation transient are respectively calculated for similarity.

4. The method according to claim 1, characterized in that: The transient judgment conditions in step 102 include: The reactor power, valve position, main pump status, etc. among multiple continuously changing key data change; or The temperature or pressure fluctuation range of multiple continuously changing key data exceeds the threshold.

5. A heavy water reactor operation transient rapid identification device, characterized in that: The device comprises: The acquisition module is used to obtain the operation parameters of the nuclear power plant through the PI system of the nuclear power plant, and obtain the operator records through the nuclear power plant operating system to form key data. The key data include: reactor power, main pump speed, temperature at key locations, pressure at key locations, flow at key locations, and valve switch status; A judgment module, used for marking the multiple continuously changing key data as operation transient data and marking the state corresponding to the multiple continuously changing key data as operation transient when the change state of the multiple continuously changing key data meets the transient judgment condition; An extraction module, used to extract the power value at the beginning of the transient state and the power value at the end of the transient state, as well as the temperature, pressure and flow value in the transient state from the operation transient data; A first comparison module is used to compare the extracted power value at the beginning of the transient and the power value at the end of the transient with the power values ​​at the beginning of each design transient and the power values ​​at the end of each design transient in the transient database for similarity, and to take the top N design transients ranked from large to small in similarity as the design transient set, where N is a positive integer greater than 1; The second comparison module is used to compare the temperature, pressure and flow values ​​in the extracted transient with the temperature, pressure and flow values ​​of various design transients in the design transient set for similarity, and take the type of the design transient with the greatest similarity as the type of the operating transient.

6. A heavy water reactor operation transient rapid identification device, characterized in that: The device comprises: processor; a memory for storing processor-executable instructions; The processor is configured to execute the method according to any one of claims 1 to 4.

7. A non-volatile computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the computer program instructions are executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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