Water flooding simulation method based on water pressure door pushing working condition and related equipment

Abstract

The invention discloses a water flooding simulation method based on a water pressure door pushing working condition and related equipment, and belongs to the technical field of water flooding simulation. The method comprises the following steps: constructing a physical model in a nuclear power plant; determining water logging parameters of the water pressure push door water logging working condition, and debugging the nuclear power plant internal physical model according to the water logging parameters of the water pressure push door water logging working condition; simulating and executing a water flooding simulation test of the water flooding working condition of the water pressure push door, and recording hydraulic parameters in the water flooding simulation process until the water flooding simulation test of the water flooding working condition of the water pressure push door is completed. According to the method, the nuclear power plant internal physical model is constructed, and the flooding simulation process under the water pressure push door flooding working condition is tested through the nuclear power plant internal physical model, so that the spreading path, the accumulation process and the distribution state of the water flow in the complex environment of the nuclear power plant can be visually observed, and the flooding simulation precision is effectively improved; the accuracy of the flooding simulation key hydraulic parameters is improved, and data support is provided for safety design and emergency strategy formulation in the nuclear power plant.

Description

Technical Field

[0001] This application relates to the field of flood simulation technology, and in particular to a flood simulation method and related equipment based on water pressure door pushing conditions. Background Technology

[0002] Currently, flooding inside nuclear power plant buildings is considered a common-cause failure of systems and equipment, meaning that multiple components or systems fail simultaneously due to the same cause. Therefore, this potential risk must be fully considered in the design and disaster prevention of nuclear power plants.

[0003] In related technologies, waterproof doors, as a key physical barrier to prevent the spread of flooding, directly determine the final extent and consequences of flooding through their dynamic response process under actual water pressure—including leakage at door gaps, door opening, and flow under large openings. Predictive analysis is typically performed using numerical simulation and engineering judgment methods. However, in practical applications, it has been found that most key parameters in traditional simulation analysis methods are based on theoretical estimations, which can easily lead to significant uncertainties in the prediction results.

[0004] In summary, the technical problems existing in the relevant technologies need to be improved. Summary of the Invention

[0005] This application provides a flooding simulation method and related equipment based on water pressure door operation, which can improve the accuracy of key hydraulic parameters in flooding simulation and provide data support for the safety design and emergency strategy formulation of nuclear power plant interiors.

[0006] On one hand, this application provides a flooding simulation method based on water pressure pushing door conditions, the method including the following steps: Constructing a physical model of the interior of a nuclear power plant; Determine the flooding parameters for the water pressure push-door flooding condition, and adjust the internal physical model of the nuclear power plant building based on the flooding parameters for the water pressure push-door flooding condition; A flood simulation test was conducted to simulate the flooding condition of the water pressure pushing door, and the hydraulic parameters during the flood simulation process were recorded until the flood simulation test of the water pressure pushing door condition was completed.

[0007] Optionally, determining the flooding parameters for the water pressure push-door flooding condition, and adjusting the internal physical model of the nuclear power plant building based on the flooding parameters for the water pressure push-door flooding condition, includes: Determine the flood initiation point, flood outflow type, water pressure gate opening time, and flood duration of the water pressure gate operation. Based on the flooding initiation point and the flood outflow type, the internal physical model of the nuclear power plant building was adjusted. The types of water outflow include outflow through door gaps and outflow through holes.

[0008] Optionally, the simulation of the flooding under the water pressure push-door flooding condition includes recording hydraulic parameters during the flooding simulation process until the flooding simulation of the water pressure push-door flooding condition is completed, comprising: A flood simulation test was conducted based on a preset flood duration to simulate the flooding conditions of the water pressure door, and flood simulation measuring instruments were deployed; wherein, the flood simulation measuring instruments include a camera, a water level gauge and a particle image velocimeter. By combining a camera, a water level gauge, and a particle image velocimeter, the hydraulic parameters during the flooding simulation process are measured and recorded until the flooding simulation test of the water pressure push-door flooding condition is completed.

[0009] Optionally, the method further includes: By combining the video data captured by the camera, the water level data measured by the water level gauge and the particle image velocimeter, and the flow velocity data, the spread path of the water pressure push-door flooding condition is analyzed.

[0010] Optionally, after completing the flood simulation test under the water pressure push-door flooding condition, the method further includes: Return to the process of adjusting the internal physical model of the nuclear power plant building according to the flooding parameters of the water pressure push-door flooding condition, and re-simulate the flooding simulation test of the water pressure push-door flooding condition, recording the hydraulic parameters during the flooding simulation process, until the number of flooding simulation tests of the water pressure push-door flooding condition reaches the preset threshold. The average value of each hydraulic parameter in all flooding simulation processes was calculated and used as the final flooding simulation test result.

[0011] Optionally, the construction of the internal physical model of the nuclear power plant includes: Based on the internal structure of a nuclear power plant, a physical model of the internal structure of the nuclear power plant is constructed, and a circulating water storage tank, a water supply centrifugal pump, and a discharge pipeline are provided. The internal physical model of the nuclear power plant is designed as a two-layer structure, constructed using plexiglass, steel, and pulleys.

[0012] On the other hand, embodiments of this application provide a flooding simulation device based on water pressure door opening conditions, the device comprising: The model building module is used to build physical models of the interior of nuclear power plants; The model debugging module is used to determine the flooding parameters of the water pressure push-door flooding condition, and to debug the internal physical model of the nuclear power plant building based on the flooding parameters of the water pressure push-door flooding condition. The flood simulation module is used to simulate the flood simulation test of the water pressure push-door flood condition, record the hydraulic parameters during the flood simulation process, and complete the flood simulation test of the water pressure push-door flood condition.

[0013] On the other hand, embodiments of this application provide an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the above-described method.

[0014] On the other hand, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method.

[0015] On the other hand, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0016] This application embodiment constructs an internal physical model of a nuclear power plant and conducts a water flooding simulation under the condition of water pressure pushing the door through the internal physical model of the nuclear power plant. This allows for a direct observation of the diffusion path, accumulation process, and distribution of water flow in the complex environment of the nuclear power plant, effectively improving the accuracy of water flooding simulation and the accuracy of key hydraulic parameters in the water flooding simulation. This provides data support for the safety design and emergency strategy formulation of the nuclear power plant interior. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the implementation environment of a flooding simulation method based on water pressure pushing door conditions provided in an embodiment of this application; Figure 2 This is a flowchart illustrating a flooding simulation method based on water pressure pushing door conditions provided in an embodiment of this application; Figure 3 This is a plan view of the internal physical model of a nuclear power plant provided in an embodiment of this application; Figure 4 This is a cross-sectional view of the internal physical model of a nuclear power plant provided in an embodiment of this application; Figure 5 This is one of the schematic diagrams of the internal physical model of a nuclear power plant provided in the embodiments of this application; Figure 6 This is a second schematic diagram of the internal physical model of a nuclear power plant provided in the embodiments of this application; Figure 7 This is one of the schematic diagrams of water level change curves in a flooding simulation test provided in the embodiments of this application; Figure 8 This is a second schematic diagram of a water level change curve in a flooding simulation test provided in an embodiment of this application; Figure 9 This is the third schematic diagram of a water level change curve in a flooding simulation test provided in this application embodiment; Figure 10This is a schematic diagram of the spread path of a flooding simulation test provided in an embodiment of this application; Figure 11 This is a schematic diagram of a flood simulation device based on water pressure pushing door conditions provided in an embodiment of this application; Figure 12 This is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit it. In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this application; they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.

[0019] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various concepts, but unless otherwise stated, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of the embodiments of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the words “if,” “when,” or “in response to a determination” as used herein may be interpreted as “when…” or “when…” or “in response to a determination.”

[0020] As used in this application, the terms "at least one", "multiple", "each", "any", etc., "at least one" includes one, two or more, "multiple" includes two or more, "each" refers to each of the corresponding multiples, and "any" refers to any one of the multiples.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0022] Currently, flooding inside nuclear power plant buildings is considered a common-cause failure of systems and equipment, meaning that multiple components or systems fail simultaneously due to the same cause. Therefore, this potential risk must be fully considered in the design and disaster prevention of nuclear power plants.

[0023] In related technologies, waterproof doors, as a key physical barrier to prevent the spread of flooding, directly determine the final extent and consequences of flooding through their dynamic response process under actual water pressure—including leakage at door gaps, door opening, and flow under large openings. Predictive analysis is typically performed using numerical simulation and engineering judgment methods. However, in practical applications, it has been found that most key parameters in traditional simulation analysis methods are based on theoretical estimations, which can easily lead to significant uncertainties in the prediction results.

[0024] In view of this, this application provides a flooding simulation method and related equipment based on the water pressure door pushing condition. By constructing a physical model of the inside of a nuclear power plant and testing the flooding simulation process under the water pressure door pushing condition through the physical model of the inside of the nuclear power plant, the spread path, accumulation process and distribution state of water flow in the complex environment of the nuclear power plant can be intuitively observed, effectively improving the accuracy of flooding simulation and the accuracy of key hydraulic parameters in flooding simulation, and providing data support for the safety design and emergency strategy formulation inside the nuclear power plant.

[0025] It should be noted that in all specific embodiments of this application, when processing data related to user identity or characteristics, such as user information, user behavior data, user historical data, and user location information, user permission or consent is obtained first. Furthermore, the collection, use, and processing of this data comply with relevant laws, regulations, and standards. In addition, when embodiments of this application require access to sensitive personal information of users, separate permission or consent from the user is obtained through pop-ups or redirection to confirmation pages. Only after obtaining the user's separate permission or consent is the necessary user-related data required for the proper functioning of these embodiments acquired.

[0026] The specific implementation methods of the embodiments of this application will be described in detail below with reference to the accompanying drawings. First, a flooding simulation method based on water pressure pushing door conditions provided in the embodiments of this application will be described with reference to the accompanying drawings.

[0027] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the implementation environment for a flood simulation method based on water pressure pushing door conditions provided in this application embodiment. In this implementation environment, the main hardware and software components involved include a terminal processor 110 and a server 120.

[0028] Specifically, the terminal processor 110 may be equipped with a control program for a flood simulation method based on water pressure door opening conditions, and the server 120 serves as the backend server for this control program. The terminal processor 110 and the backend server 120 are connected via a communication link. The flood simulation method based on water pressure door opening conditions provided in this embodiment can be executed on the terminal processor 110 side.

[0029] Server 120 can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN (Content Delivery Network), and big data and artificial intelligence platforms.

[0030] In addition, server 120 can also be a node server in a blockchain network.

[0031] The terminal processor 110 and the server 120 can establish a communication connection via a wireless network. This wireless network uses standard communication technologies and / or protocols. The network can be the Internet or any other network, including but not limited to a Local Area Network (LAN), Metropolitan Area Network (MAN), Wide Area Network (WAN), mobile, or any combination of wireless networks, private networks, or virtual private networks. Furthermore, these hardware and software components can use the same or different communication connection methods; this application does not impose specific limitations in this regard.

[0032] Of course, this is understandable. Figure 1 The implementation environment described in this application is only one of the optional application scenarios for the flooding simulation method based on water pressure door pushing conditions provided in this embodiment. The actual application is not fixed. Figure 1 The software and hardware environment shown is not specifically limited in this application.

[0033] like Figure 2 As shown, Figure 2 This is a flowchart illustrating a flood simulation method based on water pressure pushing door conditions provided in this application embodiment, specifically including but not limited to steps 100 to 300.

[0034] Step 100: Construct a physical model of the interior of the nuclear power plant.

[0035] In this embodiment of the application, a repeatable and observable physical model of the interior of a nuclear power plant can be constructed according to predetermined functional requirements in order to reproduce various typical flooding conditions inside the nuclear power plant.

[0036] For example, the construction of the internal physical model of a nuclear power plant includes: Based on the internal structure of a nuclear power plant, a physical model of the internal structure of the nuclear power plant is constructed, and a circulating water storage tank, a water supply centrifugal pump, and a discharge pipeline are provided. The internal physical model of the nuclear power plant is designed as a two-layer structure, constructed using plexiglass, steel, and pulleys.

[0037] In practical applications, a physical model of the internal structure of a nuclear power plant can be constructed based on its internal structure, and this model can be set as a two-layer structure.

[0038] For example, please refer to Figure 3 , Figure 3 This is a plan view of a physical model of the interior of a nuclear power plant, provided in an embodiment of this application. The physical model includes a circulating water tank, a centrifugal pump for water supply, and a discharge pipe. The circulating water tank stores water resources for testing flooding conditions. The centrifugal pump pumps water from the circulating water tank into the inlet pipe, which then delivers the water into the physical model of the nuclear power plant, simulating flooding conditions inside the plant. The outlet of the centrifugal pump is connected to an electromagnetic flow meter via a pipe to control the flow rate during flooding conditions inside the nuclear power plant.

[0039] Further, please refer to Figure 4 , Figure 4 This is a cross-sectional view of an internal physical model of a nuclear power plant provided in an embodiment of this application. The internal physical model of the nuclear power plant is mainly set as a two-layer structure, such as... Figure 3 and Figure 4 As shown, the physical model of the nuclear power plant's interior has three rooms on each floor. Rooms 1, 2, and 3 are located on the second floor, with varying areas and flow patterns to enhance flow regime diversity and better simulate the unsteady flow caused by structural damage within the plant. Furthermore, rooms 4, 5, and 6 are located on the first floor, corresponding to the positions of rooms 1, 2, and 3 on the second floor. For example... Figure 3 As shown, the position of room 4 coincides with the position of room 1 in the vertical direction, the position of room 5 coincides with the position of room 2 in the vertical direction, and the position of room 6 coincides with the position of room 3 in the vertical direction.

[0040] In practical applications, the bottom of the physical model inside the nuclear power plant building is also equipped with support brackets and drainage pipes. The support brackets are used to fix and support the physical model, while the drainage pipes are used to drain the water inside the physical model and return it to the circulating water tank to prevent residual water from affecting the accuracy of the flow rate. In addition, the water level in the circulating water tank can be set to be flush with the first floor slab of the physical model inside the nuclear power plant building, and the drainage pipes can be kept full to avoid the empty pipe effect.

[0041] Furthermore, the physical model of the nuclear power plant interior is constructed using plexiglass, steel, and pulleys, and is equipped with stepped staircases to connect the first and second floors of the double-layer structure. The stairwell entrances are equipped with horizontal door gaps so that when a flooding accident occurs on the second floor, water can flow from the second floor to the first floor through the door gaps.

[0042] In practical applications, the use of plexiglass facilitates the observation of water flow direction and diffusion path during flooding tests. By welding an iron frame onto the second-layer base plate with steel and connecting it with multiple lifting pulleys, a detachable physical model of the nuclear power plant's interior can be formed, improving the flexibility of flooding simulation.

[0043] For example, when only the first floor is needed for flood simulation, the second floor can be raised using lifting pulleys. Alternatively, when more layers of structure need to be added to the physical model inside the nuclear power plant, the second floor can be raised using lifting pulleys, thereby inserting additional internal structures between the first and second floors and forming a multi-layered physical model of the nuclear power plant's interior.

[0044] Therefore, it is understandable that Figure 3 and Figure 4 The physical model structure of the nuclear power plant interior shown is only one of the optional structural designs in the physical model of the nuclear power plant interior provided in this embodiment of the application. The actual structure is not fixed. Figure 3 and Figure 4 The physical model of the internal structure of the nuclear power plant shown is not specifically limited in this application.

[0045] Step 200: Determine the flooding parameters for the water pressure push-door flooding condition, and adjust the internal physical model of the nuclear power plant building according to the flooding parameters for the water pressure push-door flooding condition.

[0046] In this embodiment of the application, before simulating the flooding condition of the water pressure push-door using the internal physical model of the nuclear power plant, it is necessary to determine the flooding parameters of the water pressure push-door flooding condition in advance, and to debug the internal physical model of the nuclear power plant using the flooding parameters of the water pressure push-door flooding condition, thereby completing the preparation work for the flooding simulation test of the internal physical model of the nuclear power plant.

[0047] Among them, the water pressure door flooding scenario simulates the rupture of an internal pipe in a nuclear power plant, where the leaking water pressure forces the door open, thus reproducing the entire process of the door being pushed open from being tightly closed, under pressure, leaking, to being flooded.

[0048] In practical applications, the water inside the physical model of the nuclear power plant is first drained through the effluent pipe. Then, according to the flooding point in the flooding condition, the valve of the corresponding inlet pipe is opened. The flow rate at the breach is then adjusted by the electromagnetic flow meter and the water supply centrifugal pump to match the flooding flow rate in the flooding condition. After setting up high-precision instruments to measure the flow velocity, flow rate at the door gaps / holes and the water level changes in each room, the commissioning preparation process of the physical model inside the nuclear power plant is completed.

[0049] Specifically, as an optional implementation, determining the flooding parameters for the water pressure-driven gate flooding condition and adjusting the internal physical model of the nuclear power plant building based on the flooding parameters for the water pressure-driven gate flooding condition includes: Determine the flood initiation point, flood outflow type, water pressure gate opening time, and flood duration of the water pressure gate operation. Based on the flooding initiation point and the flood outflow type, the internal physical model of the nuclear power plant building was adjusted. The types of water outflow include outflow through door gaps and outflow through holes.

[0050] In this embodiment of the application, when reading and determining the flooding parameters of the water pressure push-door flooding condition, the main determinations are the flooding initiation point, flood outflow type, water pressure push-door timing, and flooding duration. The flooding initiation point is the starting location of the flooding accident in the flooding condition simulation test. The flood outflow type is the flooding spread method in the flooding condition. For example, the flood outflow type in the water pressure push-door flooding condition may include door gap outflow and hole outflow. The water pressure push-door timing is the triggering point of the water pressure push-opening door. It can be set to trigger the water pressure push-opening door action when the time the door is subjected to water pressure meets a preset condition, or it can be set to trigger the water pressure push-opening door action when the water level height of the door is subjected to water pressure meets a preset condition. The flooding duration is the length of time for the water pressure push-door flooding condition simulation test.

[0051] For example, please refer to Figure 5 , Figure 5 This is one of the schematic diagrams of the internal physical model of a nuclear power plant provided in the embodiments of this application. Figure 5The diagram shows the structural design of each room in the second floor of the physical model of the nuclear power plant building. Different types of outflow methods are marked with red lines. Rooms 1 and 2 in the second floor are equipped with inlet pipes, which can be used as flooding initiation points. The water flow rate during the flooding simulation test can be controlled by adjusting the size of the inlet pipe opening. The door between room 1 and the second-floor corridor is equipped with a water pressure door for the door to be pushed open by water pressure during the flooding operation. Room 2 is equipped with ground holes and horizontal door gaps for outflow. The ground holes can be used to simulate the spread path of water leakage from the holes to lower floors during a flooding accident. Furthermore, the horizontal door gaps allow the water in room 2 to spread to room 3, and then spread to the second-floor stairwell through the horizontal door gap between room 3 and the stairwell. This can realistically simulate the flooding process between different rooms and different floors during a flooding operation.

[0052] Further, please refer to Figure 6 , Figure 6 This is the second schematic diagram of an internal physical model of a nuclear power plant provided in an embodiment of this application. Figure 6 The diagram shows the structural design of each room in the first floor of the physical model of the nuclear power plant building. Different types of outflow methods are marked with red lines. Room 4 in the first floor is equipped with an inlet pipe, which can be used as the flood initiation point. Room 4 has a horizontal door gap outflow method. In addition, different types of flood initiation can be achieved by adjusting the size of the pipe opening. Room 5 has a side wall hole outflow method, which can be used to simulate the spread path of water seeping and leaking from the wall holes during a flood accident. Furthermore, the horizontal door gap between room 6 and the stairwell can realistically simulate the flood spread process between different rooms and different floors during a flood.

[0053] In practical applications, dimensional parameters for different flood outflow types can be determined. For example, the radius of the ground hole can be preset to 0.05m, the radius of the side wall hole to 0.06m, and the height of the side wall hole from the ground to 0.15m. Furthermore, the horizontal door gap can be simultaneously set to be located directly below the doorway of each room, with a height of 0.01m and a length of 0.28m. Further, the water pressure can be preset to push the door open when the water level reaches 0.1m.

[0054] Therefore, by determining the flood initiation point and the flood outflow model, the internal physical model of the nuclear power plant can be debugged, thus completing the preparation work before conducting the flood simulation test. This can be achieved by opening or closing valves on different inlet pipes, using openings in the pipes as inlets, and then detecting the inlet flow rate using an electromagnetic flowmeter.

[0055] For example, the starting point of the water pressure push-door flooding condition can be set as room 1 on the second floor of the internal physical model of the nuclear power plant. The flood outflow types include door gap outflow (horizontal door gaps under the door of each room and vertical door gaps between rooms 4 and 5) and hole outflow (leaking through the ground hole in room 2 to room 5 on the first floor, and then outflowing through the side wall hole of room 5). Thus, room 1 can be set as the flood initiation room, and the door between room 1 and the second-floor corridor can be set as a water pressure push-door. The door is sealed with wooden stakes and waterproof putty. The water pressure push-door timing is set at a water level of 0.1m. That is, when the water depth reaches 0.1m, the wooden stakes and waterproof putty are quickly removed, and the door is immediately pushed open by the water pressure. The flow rate at the rupture of the inlet pipe is adjusted to a pre-set 1.8m³ / h by the electromagnetic flow meter and the water supply centrifugal pump, and the flooding duration is set to 30 minutes, thereby completing the commissioning of the internal physical model of the nuclear power plant.

[0056] Step 300: Simulate the flooding simulation test of the water pressure push-door flooding condition, record the hydraulic parameters during the flooding simulation process, until the flooding simulation test of the water pressure push-door flooding condition is completed.

[0057] In this embodiment of the application, the internal physical model of the nuclear power plant is debugged by determining the flooding parameters of the water pressure push-door flooding condition. After setting up high-precision instruments to measure the flow velocity, flow rate and water level changes in each room at the door gaps / holes, the flooding simulation test of the water pressure push-door flooding condition can be started, and the hydraulic parameters during the flooding simulation process are recorded until the flooding simulation test of the water pressure push-door flooding condition is completed.

[0058] Therefore, compared to traditional nuclear power plant flood analysis, which often employs conservative deterministic methods or computational fluid dynamics (CFD) simulations (where deterministic analysis is often overly conservative and may exaggerate flood consequences, leading to increased design costs), and CFD simulation suffers from complex modeling and high computational resource consumption), this application constructs an internal physical model of the nuclear power plant and conducts a flood simulation under pressure-driven door flooding conditions using this model. This allows for direct observation of the water flow's diffusion path, accumulation process, and distribution within the complex environment of the nuclear power plant, effectively improving the accuracy of flood simulation and key hydraulic parameters. This provides data support for the safety design and emergency response strategy development within the nuclear power plant.

[0059] Optionally, as a specific implementation, the simulated flooding test of the water pressure pushing gate flooding condition, recording the hydraulic parameters during the flooding simulation process, until the flooding simulation test of the water pressure pushing gate flooding condition is completed, includes: A flood simulation test was conducted based on a preset flood duration to simulate the flooding conditions of the water pressure door, and flood simulation measuring instruments were deployed; wherein, the flood simulation measuring instruments include a camera, a water level gauge and a particle image velocimeter. By combining a camera, a water level gauge, and a particle image velocimeter, the hydraulic parameters during the flooding simulation process are measured and recorded until the flooding simulation test of the water pressure push-door flooding condition is completed.

[0060] In this embodiment, a flood simulation test is conducted based on a preset flood duration, simulating a water pressure door-pushing flood condition. Video recording is performed using a camera, and water level gauges monitor water level changes in each room during the simulation. Simultaneously, a particle image velocimeter (PIV) is used to measure hydraulic parameters at door gaps and openings during the simulation, until the water pressure door-pushing flood simulation test is complete. For example, because the door is opened by a large flow of water, the hydraulic characteristics at the door opening are complex and diverse. Velocity and flow rate measurements are performed on the left, middle, and right sides of the door opening to more accurately determine the hydraulic characteristics of the door. Furthermore, high-precision PIV two-dimensional velocity and flow rate measurements are performed on the door gaps and openings through which water flows; data on water level changes is collected for each room and corridor.

[0061] In practical applications, water level measuring points can be installed in each room of the physical model inside a nuclear power plant building. For example, pressure water level gauges can be installed in rooms on the first floor, and ultrasonic water level gauges can be installed in rooms on the second floor, thereby monitoring the water level change process. Furthermore, by measuring the flow velocity data of each door gap and hole during the flooding simulation process using particle image velocimetry instruments, the cross-sectional area of ​​each door gap and hole can be calculated in combination with the size of each door gap and hole, thereby calculating the flow rate data of each door gap and hole.

[0062] For example, please refer to Figure 7 , Figure 8 and Figure 9 , Figure 7 This is one of the schematic diagrams of water level change curves in a flooding simulation test provided in the embodiments of this application. Figure 8 This is the second schematic diagram of a water level change curve in a flooding simulation test provided in this application embodiment. Figure 9 This is the third schematic diagram of a water level change curve in a flooding simulation test provided in this application embodiment. Specifically, Figure 7 The water level change curve in the figure corresponds to the water level change process in room 1 on the second floor of the physical model inside the nuclear power plant building under a water pressure push-door flooding condition with a flooding duration of 30 minutes. Figure 8 The water level change curve in the figure corresponds to the water level change process in room 3 on the second floor of the physical model inside the nuclear power plant during a water flooding simulation test under a water pressure push-door flooding condition lasting 30 minutes. Figure 9 The water level change curve in the figure corresponds to the water level change process of room 6 on the first floor of the physical model inside the nuclear power plant under the water pressure push-door flooding condition with a flooding duration of 30 minutes.

[0063] Specifically, after the simulated water pressure door-pushing flooding operation began, when the inlet pipe at the top of room 1, which is the flooding initiation point, leaked at a constant flow rate of 1.8 m³ / h, the water level in the room (since room 1 is located on the second floor, the initial water level height was 0.56 m) rose rapidly. After 300 seconds, when the water level rose by 0.1 m, the water pressure door-pushing action was triggered. The gushing water flowed through the second-floor corridor and spread to the second-floor stairwell, room 3, and room 2. Therefore, the water level trend in room 1 showed an initial linear rise, followed by a rapid drop after the water pressure door-pushing, and due to the flooding process, the water level gradually stabilized at 0.57 m. Furthermore, the water level changes in the second-floor stairwell, room 3, and room 2 were roughly the same. Initially, because the door of room 1 had not yet been pushed open by the water pressure, and the gaps under the door were sealed with waterproof putty, the water level in the second-floor stairwell, room 3, and room 2 did not change initially. It was not until the water pressure pushed the door open that a large amount of water rushed out and spread, causing the water level to rise sharply. Then, due to the holes in the ground in the second-floor stairwell and room 2, the water level slowly dropped back to the initial level.

[0064] Furthermore, the water level changes in rooms 4 and 6 on the first floor, the corridor on the first floor, and the stairwell on the first floor showed roughly the same trend. Initially, there was no change in water level, and after the water pressure pushed the door open, the water level gradually rose linearly. However, the water level in room 5 showed a step-like upward trend as the leakage spread, because the inflow was a large flow from the ground hole, while the outflow was from the vertical door gap (the vertical door gap is narrow, and its outflow increases with the rise in water level). Specifically: 0~315s, no water; 315~426s, the water level rose according to a quadratic function law; 426~630s, the water level entered a plateau period and basically stabilized; 630~1800s (end of the test), the water level rose linearly.

[0065] In practical applications, the method further includes: combining the video data captured by the camera, the water level data measured by the water level gauge and the particle image velocimeter, and the flow velocity data to analyze and obtain the spread path of the water pressure push-door flooding condition.

[0066] In this embodiment of the application, by combining video data captured by a camera, water level data measured by a water level gauge and a particle image velocimeter, and flow velocity data, the time points at which water level changes occur in each room after the flooding begins at the flooding point can be determined, thereby confirming the spread path of the water pressure door flooding condition. This can be used for verification in digital simulation experiments and can also provide data support for safety design and emergency strategy formulation.

[0067] For example, Table 1 is a table of nodes representing the flooding path under the water pressure pushing door flooding condition. Table 1 shows the key time nodes in the flooding process under the water pressure pushing door flooding condition according to the embodiments of this application. Further, please refer to... Figure 10 , Figure 10 This is a schematic diagram of the flooding simulation test spread path provided in an embodiment of this application, in conjunction with Table 1 and... Figure 10 This allows us to clearly define the sequence of water flow through each room and the outflow method during a water-pressure door-pushing flooding scenario.

[0068] Table 1. Flooding Path Nodes under Water Pressure Push-Gate Operation

[0069] Specifically, the flooding originated in room 1 on the second floor. After the leaking flow from the pipes at the top, a continuous flow of water impacted the floor of room 1, causing splashing and significant fluctuations in water level. As the water level gradually rose, a thick water cushion gradually formed inside room 1. When the water level in room 1 rose to 0.1m, the water pressure triggered by removing the movable wooden stake behind the door caused the door to be pushed open by the water pressure, and the water rushed into the second-floor corridor, causing the water level in room 1 to drop rapidly and spread outwards.

[0070] Furthermore, the water flowing from room 1 spreads out through the second-floor corridor and room 3. Part of the water flows through the horizontal door gap in the second-floor stairwell and then leaks into the first-floor stairwell through the steps connecting the first and second-floor stairwells. It continues to spread through the horizontal door gap in the first-floor stairwell. Another part of the water flows into room 2 through the horizontal door gap between room 3 and room 2, and then leaks into room 5 through the hole in the floor of room 2.

[0071] Ultimately, the water that spread through the horizontal door gap in the first-floor stairwell passed through room 6 and the first-floor corridor, then entered room 4 through the horizontal door gap in room 4. Most of the water that entered room 5 through the hole in the second-floor ground accumulated in room 5, and the water level in room 5 rose significantly. A small portion of the water entered room 4 through the vertical door gap and entered room 6 through the hole in the side wall.

[0072] Therefore, this application can reproduce the actual flooding process and provide real data, allowing for intuitive observation of the spread path, accumulation process and distribution of water in the complex environment of a nuclear power plant, thereby providing data support for safety design and emergency strategy formulation.

[0073] Specifically, as an optional implementation, after completing the flood simulation test of the water pressure push-door flooding condition, the method further includes: Return to the process of adjusting the internal physical model of the nuclear power plant building according to the flooding parameters of the water pressure push-door flooding condition, and re-simulate the flooding simulation test of the water pressure push-door flooding condition, recording the hydraulic parameters during the flooding simulation process, until the number of flooding simulation tests of the water pressure push-door flooding condition reaches the preset threshold. The average value of each hydraulic parameter in all flooding simulation processes was calculated and used as the final flooding simulation test result.

[0074] In this embodiment of the application, after completing the flood simulation test of a single water pressure push-gate flooding condition, the process can return to the pre-test preparation steps of debugging the internal physical model of the nuclear power plant building according to the flooding parameters of the water pressure push-gate flooding condition. After debugging, the gate is reopened, and a preset pipeline leakage is simulated. All measuring instruments are controlled to start working synchronously, and the hydraulic parameters during the flood simulation process are recorded.

[0075] Furthermore, by repeatedly conducting flood simulation tests under the water pressure pushing door flood condition through a pre-set threshold for the number of flood simulation tests, random errors can be eliminated. By averaging the hydraulic parameter data from multiple flood simulations, more realistic and scientific key hydraulic characteristic parameters can be obtained. These parameters may include visualized data showing the diffusion path, as well as quantitative relationship curves of water level, flow velocity, and flow rate over time. This improves the reliability and scientific rigor of safety design and emergency strategy formulation within nuclear power plant buildings.

[0076] Please see Figure 11 , Figure 11 This is a schematic diagram of a flood simulation device based on water pressure door opening conditions provided in an embodiment of this application. This application also provides a flood simulation device based on water pressure door opening conditions, which can implement the above-mentioned flood simulation method based on water pressure door opening conditions. The device includes: Model building module 1110 is used to build a physical model of the interior of a nuclear power plant. The model debugging module 1120 is used to determine the flooding parameters of the water pressure push-door flooding condition, and to debug the internal physical model of the nuclear power plant building according to the flooding parameters of the water pressure push-door flooding condition. The flood simulation module 1130 is used to simulate the flood simulation test of the water pressure push-door flood condition, record the hydraulic parameters during the flood simulation process, and complete the flood simulation test of the water pressure push-door flood condition.

[0077] It is understood that the content of the above method embodiments is applicable to the present device embodiments. The specific functions implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0078] Please see Figure 12 , Figure 12 This is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of this application. The electronic device includes: The processor 1201 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this application. The memory 1202 can be implemented as a read-only memory (ROM), static storage device, dynamic storage device, or random access memory (RAM). The memory 1202 can store the operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 1202 and is called and executed by the processor 1201 using the methods described in the embodiments of this application. The input / output interface 1203 is used to implement information input and output; The communication interface 1204 is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.). Bus 1205 transmits information between various components of the device (e.g., processor 1201, memory 1202, input / output interface 1203, and communication interface 1204); The processor 1201, memory 1202, input / output interface 1203 and communication interface 1204 are connected to each other within the device via bus 1205.

[0079] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method.

[0080] It is understood that the content of the above method embodiments is applicable to this storage medium embodiment. The specific functions implemented in this storage medium embodiment are the same as those in the above method embodiments, and the beneficial effects achieved are also the same as those achieved in the above method embodiments.

[0081] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0082] It is understood that the content of the above method embodiments is applicable to the embodiments of this program product. The specific functions implemented by the embodiments of this program product are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0083] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0084] This application provides a flooding simulation method and related equipment based on water pressure door pushing conditions. By constructing a physical model of the interior of a nuclear power plant and testing the flooding simulation process under water pressure door pushing conditions using the physical model, it is possible to intuitively observe the diffusion path, accumulation process, and distribution state of water flow in the complex environment of the nuclear power plant. This effectively improves the accuracy of flooding simulation and the accuracy of key hydraulic parameters in flooding simulation, providing data support for the safety design and emergency strategy formulation of the interior of the nuclear power plant.

[0085] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0086] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0087] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0088] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0089] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0090] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0091] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0092] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0093] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0094] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0095] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A flooding simulation method based on water pressure pushing door operation, characterized in that, The method includes the following steps: Constructing a physical model of the interior of a nuclear power plant; Determine the flooding parameters for the water pressure push-door flooding condition, and adjust the internal physical model of the nuclear power plant building based on the flooding parameters for the water pressure push-door flooding condition; A flood simulation test was conducted to simulate the flooding condition of the water pressure pushing door, and the hydraulic parameters during the flood simulation process were recorded until the flood simulation test of the water pressure pushing door condition was completed.

2. The method according to claim 1, characterized in that, The process of determining the flooding parameters for the water pressure-driven door flooding condition and adjusting the internal physical model of the nuclear power plant building based on these parameters includes: Determine the flood initiation point, flood outflow type, water pressure gate opening time, and flood duration of the water pressure gate operation. Based on the flooding initiation point and the flood outflow type, the internal physical model of the nuclear power plant building was adjusted. The types of water outflow include outflow through door gaps and outflow through holes.

3. The method according to claim 1, characterized in that, The simulated flooding test of the water pressure pushing gate flooding condition is carried out, and the hydraulic parameters during the flooding simulation process are recorded until the flooding simulation test of the water pressure pushing gate flooding condition is completed, including: A flood simulation test was conducted based on a preset flood duration to simulate the flooding conditions of the water pressure door, and flood simulation measuring instruments were deployed; wherein, the flood simulation measuring instruments include a camera, a water level gauge and a particle image velocimeter. By combining a camera, a water level gauge, and a particle image velocimeter, the hydraulic parameters during the flooding simulation process are measured and recorded until the flooding simulation test of the water pressure push-door flooding condition is completed.

4. The method according to claim 3, characterized in that, The method further includes: By combining the video data captured by the camera, the water level data measured by the water level gauge and the particle image velocimeter, and the flow velocity data, the spread path of the water pressure push-door flooding condition is analyzed.

5. The method according to claim 1, characterized in that, After completing the flood simulation test of the water pressure push-door flooding condition, the following is also included: Return to the process of adjusting the internal physical model of the nuclear power plant building according to the flooding parameters of the water pressure push-door flooding condition, and re-simulate the flooding simulation test of the water pressure push-door flooding condition, recording the hydraulic parameters during the flooding simulation process, until the number of flooding simulation tests of the water pressure push-door flooding condition reaches the preset threshold. The average value of each hydraulic parameter in all flooding simulation processes was calculated and used as the final flooding simulation test result.

6. The method according to claim 1, characterized in that, The construction of the internal physical model of the nuclear power plant includes: Based on the internal structure of a nuclear power plant, a physical model of the internal structure of the nuclear power plant is constructed, and a circulating water storage tank, a water supply centrifugal pump, and a discharge pipeline are provided. The internal physical model of the nuclear power plant is designed as a two-layer structure, constructed using plexiglass, steel, and pulleys.

7. A flood simulation device based on water pressure pushing door operation, characterized in that, The device includes: The model building module is used to build physical models of the interior of nuclear power plants; The model debugging module is used to determine the flooding parameters of the water pressure push-door flooding condition, and to debug the internal physical model of the nuclear power plant building based on the flooding parameters of the water pressure push-door flooding condition. The flood simulation module is used to simulate the flood simulation test of the water pressure push-door flood condition, record the hydraulic parameters during the flood simulation process, and complete the flood simulation test of the water pressure push-door flood condition.

8. An electronic device, characterized in that, The electronic device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the method according to any one of claims 1 to 6.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method of any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the method of any one of claims 1 to 6.

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