Method for simulating flooding in nuclear power plant and related equipment

Abstract

The invention discloses a nuclear power plant internal flooding simulation method and related equipment, and belongs to the technical field of flooding simulation, and the method comprises the steps: constructing a nuclear power plant internal physical model; selecting a target flooding condition from a preset nuclear power plant room flooding condition database; and debugging the physical model in the nuclear power plant according to the target water logging working condition, simulating and executing a water logging simulation test of the target water logging working condition, and recording hydraulic parameters in the water logging simulation process until the water logging simulation test of the target water logging working condition is completed. According to the method, the nuclear power plant internal physical model is constructed, the flooding simulation process is tested through the nuclear power plant internal physical model, 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, the flooding simulation precision is effectively improved, and the flooding simulation accuracy is improved by recording the hydraulic parameters in the flooding simulation process. And data support is provided for safety design and emergency strategy formulation in the nuclear power plant.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flooding simulation, in particular to a nuclear power plant room internal flooding simulation method and related equipment. BACKGROUND

[0002] Currently, nuclear power plant room internal flooding belongs to the common cause failure of systems and devices, that is, the phenomenon of simultaneous failure of multiple components or systems caused by the same reason. Therefore, in the design and disaster prevention of nuclear power plant rooms, such potential risks must be fully considered.

[0003] In related technologies, the traditional flooding analysis method mainly relies on empirical formula and simplified numerical simulation. However, in actual application, it is found that the empirical formula is usually derived based on ideal conditions and simple geometric shapes, and it is difficult to accurately reflect the influence of complex spatial structures in actual nuclear power plant rooms on water flow paths; the simplified numerical method cannot fully simulate the rolling and breaking of water under complex boundary conditions, thereby causing a large deviation between the water flooding simulation prediction results and the actual situation.

[0004] In summary, the technical problems existing in related technologies need to be improved. SUMMARY

[0005] The embodiments of the present application provide a nuclear power plant room internal flooding simulation method and related equipment, which can effectively improve the flooding simulation accuracy and provide data support for the safety design and emergency strategy formulation of the nuclear power plant room.

[0006] In one aspect, the embodiments of the present application provide a nuclear power plant room internal flooding simulation method, which comprises the following steps: constructing a nuclear power plant room internal physical model; selecting a target flooding condition from a preset nuclear power plant room flooding condition database; adjusting the nuclear power plant room internal physical model according to the target flooding condition, and simulating a water flooding simulation test of the target flooding condition, recording the hydraulic parameters in the water flooding simulation process until the water flooding simulation test of the target flooding condition is completed.

[0007] Optionally, the step of selecting a target flooding condition from a preset nuclear power plant room flooding condition database comprises: reading a preset nuclear power plant room flooding condition database in response to a flooding condition selection instruction; based on the stored flooding conditions in the nuclear power plant room flooding condition database, selecting a matched flooding condition as a target flooding condition according to the water flooding simulation test requirements; The water flooding simulation test requirements include the type of water flooding.

[0008] Optionally, before the reading of the preset nuclear power plant room flooding condition database, the method further comprises: According to the flooding initiation type, the flooding starting point and the flooding outflow type, a plurality of sets of flooding conditions are set; Respectively, the flooding parameters of each set of flooding conditions are set; Each set of flooding conditions and corresponding flooding parameters are recorded and stored in an index manner, and a nuclear power plant room flooding condition database is constructed; Wherein, the flooding initiation type includes flooding spread and flooding spray; the flooding outflow type includes door gap outflow and hole outflow; the flooding parameters include flooding flow and flooding duration.

[0009] Optionally, the target flooding condition is used to debug the internal physical model of the nuclear power plant, and a flooding simulation test of the target flooding condition is simulated and executed, and the hydraulic parameters in the flooding simulation process are recorded until the flooding simulation test of the target flooding condition is completed, comprising: The target flooding condition and the corresponding flooding parameters of the target flooding condition are read, so as to debug the water inlet and the water flow of the internal physical model of the nuclear power plant; Based on the preset flooding duration, the flooding simulation test of the target flooding condition is simulated and executed, and combined with the camera, the water level meter and the particle image velocimetry instrument, the hydraulic parameters in the flooding simulation process are measured and recorded until the flooding simulation test of the target flooding condition is completed.

[0010] Optionally, after the completion of the flooding simulation test of the target flooding condition, the method further comprises: Combined with the video data obtained by the camera, the water level data and the flow velocity data measured by the water level meter and the particle image velocimetry instrument, the spread path of the target flooding condition is analyzed.

[0011] Optionally, the construction of the internal physical model of the nuclear power plant comprises: Based on the internal structure of the nuclear power plant, the internal physical model of the nuclear power plant is constructed, and the circulating water tank, the water supply centrifugal pump and the drainage pipeline are equipped; Wherein, the internal physical model of the nuclear power plant is set as a double-layer structure, and is constructed by using organic glass, steel and pulley.

[0012] On the other hand, the embodiment of the application provides a nuclear power plant internal flooding simulation device, the device comprises: Model construction module, for constructing the internal physical model of the nuclear power plant; Condition selection module, for selecting a target flooding condition from a preset nuclear power plant flooding condition database; The flooding simulation module is used for debugging the internal physical model of the nuclear power plant according to the target flooding condition, simulating a flooding simulation test of the target flooding condition, recording hydraulic parameters in the flooding simulation process, and completing the flooding simulation test of the target flooding condition.

[0013] In another aspect, an electronic device is provided, which includes a memory and a processor. The memory stores a computer program. The processor implements the method described above when executing the computer program.

[0014] In another aspect, a computer readable storage medium is provided, which stores a computer program. The computer program is executed by a processor to implement the method described above.

[0015] In another aspect, a computer program product is provided, which includes a computer program. The computer program is executed by a processor to implement the method described above.

[0016] The embodiments of the present application can intuitively observe the flooding path, accumulation process and distribution state of water flow in the complex environment of the nuclear power plant by constructing the internal physical model of the nuclear power plant and through the flooding simulation process of the internal physical model of the nuclear power plant, effectively improve the flooding simulation accuracy, and provide data support for the safety design and emergency strategy formulation of the internal nuclear power plant by recording the hydraulic parameters in the flooding simulation process. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of an implementation environment of a nuclear power plant internal flooding simulation method provided by the embodiments of the present application; Figure 2 is a flowchart of a nuclear power plant internal flooding simulation method provided by the embodiments of the present application; Figure 3 is a plan view of an internal physical model of a nuclear power plant provided by the embodiments of the present application; Figure 4 is a sectional view of an internal physical model of a nuclear power plant provided by the embodiments of the present application; Figure 5 is one of the schematic diagrams of an internal physical model of a nuclear power plant provided by the embodiments of the present application; Figure 6 is another schematic diagram of an internal physical model of a nuclear power plant provided by the embodiments of the present application; Figure 7 is a structural schematic diagram of a nuclear power plant internal flooding simulation device provided by the embodiments of the present application; Figure 8 is a hardware structure schematic diagram of an electronic device provided by the embodiments of the present application. DETAILED DESCRIPTION

[0018] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, and are not intended to limit the present application. When the following description refers to the accompanying drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with embodiments of the present application, but are only examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the appended claims.

[0019] It can be understood that the terms "first", "second", and the like used in the present application can be used herein to describe various concepts, but unless specifically 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 the present application, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information. Depending on the context, the word "if" as used herein can be interpreted as "when" or "when" or "in response to determining".

[0020] The terms "at least one", "multiple", "each", "any" and the like used in the present application include one, two or more, multiple includes two or more, and each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art to which the present application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0022] Currently, the flooding of the nuclear power plant room is a common cause failure of the system and equipment, that is, the phenomenon of simultaneous failure of multiple components or systems caused by the same reason. Therefore, in the design and disaster prevention of the nuclear power plant room, such potential risks must be fully considered.

[0023] In the related art, the conventional flooding analysis method mainly relies on empirical formula and simplified numerical simulation. However, it is found in actual application that the empirical formula is usually derived based on ideal conditions and simple geometric shapes, and it is difficult to accurately reflect the influence of complex spatial structures in actual nuclear power plant rooms on the water flow path; the simplified numerical method cannot fully simulate the rolling and breaking of water under complex boundary conditions, thereby causing a large deviation between the simulation prediction result and the actual result.

[0024] Therefore, the embodiment of the present application provides a nuclear power plant room internal flooding simulation method and related equipment. By constructing a nuclear power plant room internal physical model and through a nuclear power plant room internal physical model test flooding simulation process, the flooding simulation precision is effectively improved, and the flooding simulation process hydraulic parameters are recorded to provide data support for nuclear power plant room internal safety design and emergency strategy formulation.

[0025] The specific implementation of the embodiment of the present application is described in detail below with reference to the accompanying drawings. First, a nuclear power plant room internal flooding simulation method provided in the embodiment of the present application is described with reference to the accompanying drawings.

[0026] Please refer to Figure 1 , Figure 1 is an implementation environment schematic diagram of a nuclear power plant room internal flooding simulation method provided in the embodiment of the present application. In the implementation environment, the main hardware and software subjects mainly include a terminal processor 110 and a server 120.

[0027] Specifically, the terminal processor 110 can be installed with a related nuclear power plant room internal flooding simulation method control program, and the server 120 is a background server of the control program. The terminal processor 110 and the background server 120 are in communication connection. The nuclear power plant room internal flooding simulation method provided in the embodiment of the present application can be executed on the terminal processor 110 side.

[0028] The server 120 can be an independent physical server, a server cluster or a distributed system composed of multiple physical servers, or a cloud server providing 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 basic cloud computing services such as big data and artificial intelligence platforms.

[0029] In addition, the server 120 can also be a node server in a blockchain network.

[0030] The terminal processor 110 and the server 120 can establish a communication connection through a wireless network. The wireless network uses standard communication technologies and / or protocols, and the network can be set as the Internet, or any other network, for example, including but not limited to a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), a mobile or wireless network, a private network or a virtual private network, or any combination thereof. In addition, the same communication connection mode or different communication connection modes can be used between the above-mentioned software and hardware subjects, and the application does not make specific limitations.

[0031] Of course, it can be understood that, Figure 1 The implementation environment shown in FIG. 1 is only some optional application scenarios of the nuclear power plant room internal flooding simulation method provided in the embodiments of the present application, and the actual application is not fixed to the implementation environment shown in FIG. 1. The application does not make specific limitations. Figure 1

[0032] As shown in Figure 2 , Figure 2 is a flowchart of a nuclear power plant room internal flooding simulation method provided by the embodiments of the present application, and specifically includes but is not limited to steps 100 to 300.

[0033] Step 100, constructing a nuclear power plant room internal physical model.

[0034] In the embodiments of the present application, a repeatable test and observable nuclear power plant room internal physical model can be constructed according to the predetermined functional requirements, so as to reproduce various typical water flooding conditions in the nuclear power plant room.

[0035] Exemplarily, the construction of the nuclear power plant room internal physical model includes: Based on the internal structure of the nuclear power plant, the nuclear power plant room internal physical model is constructed, and a circulating water tank, a water supply centrifugal pump and a drainage pipeline are equipped; Wherein, the nuclear power plant room internal physical model is set as a double-layer structure, and is constructed by using organic glass, steel and pulleys.

[0036] In practical applications, the nuclear power plant room internal physical model can be constructed based on the internal structure of the nuclear power plant, and the constructed nuclear power plant room internal physical model can be set as a double-layer structure.

[0037] Exemplarily, please refer to Figure 3 , Figure 3 ​is a plan view of a nuclear power plant room internal physical model provided by an embodiment of the present application. The nuclear power plant room internal physical model is configured with a circulating water reservoir, a water supply centrifugal pump, and a drainage pipeline. The circulating water reservoir is used to store water resources for a test water flooding condition. The water supply centrifugal pump is used to pump water in the circulating water reservoir into an inflow pipeline, so as to pump the water into the nuclear power plant room internal physical model through the inflow pipeline, thereby simulating a water flooding condition occurring in the nuclear power plant room. The outlet of the water supply centrifugal pump is further connected to an electromagnetic flowmeter through a pipeline, so as to control the break flow of the water flooding condition in the nuclear power plant room.

[0038] Further, please refer to Figure 4 , Figure 4 is a sectional view of a nuclear power plant room internal physical model provided by an embodiment of the present application. The nuclear power plant room internal physical model is mainly provided as a double-layer structure, as shown in Figure 3 and Figure 4 , each layer of the nuclear power plant room internal physical model is provided with three rooms. Room 1, room 2, and room 3 are provided on the second layer. The areas and inflow and outflow modes of the rooms are different, so as to enhance the flow state difference and better simulate and reflect the unsteady flow state caused by the damage of the internal structure of the plant room. Further, room 4, room 5, and room 6 are provided on the first layer and correspond to the positions of room 1, room 2, and room 3 on the second layer, for example, as shown in Figure 3 , 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.

[0039] In actual application, the bottom of the nuclear power plant room internal physical model is further provided with a support bracket and a drainage pipeline. The support bracket is used to fix and support the nuclear power plant room internal physical model. The drainage pipeline is used to empty the water flow in the nuclear power plant room internal physical model and transport it back to the circulating water reservoir, so as to avoid the influence of residual water on the accuracy of the flow. In addition, the water level of the circulating water reservoir can be set to be flush with the bottom plate of the first layer of the nuclear power plant room internal physical model, and it is ensured that the drainage pipeline is in a full water state, so as to avoid the empty pipe effect.

[0040] Further, the nuclear power plant room internal physical model is constructed by using organic glass, steel, and pulleys, and is provided with a stepped staircase, so as to connect the first layer and the second layer in the double-layer structure. The doorway of the stairwell is provided with a horizontal door gap. When simulating a water flooding accident in the second layer, the water flow can flow from the second layer to the first layer through the door gap of the stairwell.

[0041] In practical application, by using organic glass, the water flow direction and flooding path during the water flooding test can be observed conveniently, by welding an iron frame on the second layer bottom plate using steel material and connecting through multiple lifting pulleys, a detachable nuclear power plant internal physical model can be formed, and the flexibility of water flooding simulation is improved.

[0042] For example, when only the first layer water flooding simulation is needed, the second layer can be lifted through the lifting pulley, or when more layers of structure are needed to be added to the nuclear power plant internal physical model, the second layer can be lifted through the lifting pulley, so that additional internal structure is inserted in the first layer and the second layer, and a multi-layer nuclear power plant internal physical model is formed.

[0043] Therefore, it can be understood that, Figure 3 With Figure 4 The nuclear power plant internal physical model structure shown in Figure 3 With Figure 4 The nuclear power plant internal physical model structure shown in

[0044] Step 200, selecting a target water flooding condition from a preset nuclear power plant water flooding condition database.

[0045] In the embodiment of the present application, the target water flooding condition to be simulated can be selected from the pre-constructed nuclear power plant water flooding condition database.

[0046] Because the internal structure of the nuclear power plant is complex, different flooding points and different water flooding causes can constitute a variety of typical water flooding conditions, therefore, the present application pre-sets a nuclear power plant water flooding condition database, stores different types of water flooding conditions in the nuclear power plant water flooding condition database, so that when the internal water flooding simulation test of the nuclear power plant is performed, the target water flooding condition can be quickly selected from the nuclear power plant water flooding condition database, and the efficiency of the internal water flooding simulation test of the nuclear power plant is improved.

[0047] In practical application, the target water flooding condition is selected from the preset nuclear power plant water flooding condition database, including: In response to a water flooding condition selection instruction, reading a preset nuclear power plant water flooding condition database; Based on the water flooding conditions stored in the nuclear power plant water flooding condition database, selecting a matched water flooding condition as a target water flooding condition according to water flooding simulation test requirements; The water flooding simulation test requirements include water flooding types.

[0048] In the embodiment of the present application, the water flooding condition selection instruction can be generated by a button or switch triggered by the user to start the test, or can be automatically generated by the control system according to the preset test frequency, and then the preset nuclear power plant water flooding condition database is read, and the most matched water flooding condition is selected from the stored water flooding conditions in the nuclear power plant water flooding condition database as the target water flooding condition according to the water flooding simulation test requirement.

[0049] The water flooding simulation test requirement includes a water flooding type, and the water flooding type can be distinguished by different flooding starting points, different water flooding starting types and different water flooding outflow types.

[0050] Exemplarily, before the reading of the preset nuclear power plant water flooding condition database, the method further includes: According to the water flooding starting type, the flooding starting point and the water flooding outflow type, a plurality of groups of water flooding conditions are set; The water flooding parameters are set for each group of water flooding conditions respectively; Each group of water flooding conditions and corresponding water flooding parameters are recorded and stored in an index manner to construct the nuclear power plant water flooding condition database; The water flooding starting type includes water flooding spreading and water flooding spraying, the water flooding outflow type includes door gap outflow and hole outflow, and the water flooding parameters include water flooding flow and water flooding time.

[0051] In the embodiment of the present application, a plurality of groups of different types of water flooding conditions can be set by considering a plurality of water flooding characteristics such as the water flooding starting type, the flooding starting point and the water flooding outflow type.

[0052] The water flooding starting type includes water flooding spreading and water flooding spraying, and according to the difference of the inflow pipeline break, the water flooding starting type can be divided into spreading type and spraying type, the flooding starting point can be divided into different rooms in the second layer and the first layer as different flooding starting points, and the water flooding outflow type can be divided into door gap outflow and hole outflow according to the spreading outflow mode.

[0053] Exemplarily, please refer to Figure 5 , Figure 5 is one of the schematic diagrams of the internal physical model of the nuclear power plant provided in the embodiment of the present application, Figure 5The structure design of each room in the second layer of the nuclear power plant room internal physical model is shown in FIG. 2, and different types of outflow modes are marked by red lines. Room 1 and room 2 in the second layer are provided with inflow pipes, so that room 1 and room 2 can be used as a flooding starting point. By adjusting the size of the inflow pipe break, two different types of water flooding initiation types, i.e., water flooding spraying and water flooding spreading, can be realized. Room 1 is provided with a horizontal door gap outflow mode, and room 2 is provided with a ground hole and a horizontal door gap outflow mode. Thus, the ground hole can be used to simulate the spreading path of water leakage from the hole to the lower floor during the water flooding accident. Further, water can spread to room 3 through the horizontal door gap, and then spread to the stairwell through the horizontal door gap between room 3 and the stairwell, thereby effectively simulating the water flooding spreading process between different rooms and different floors during the water flooding process.

[0054] Further, please refer to Figure 6 , Figure 6 is a schematic diagram of a nuclear power plant room internal physical model provided by the embodiment of the present application, Figure 6 The structure design of each room in the first layer of the nuclear power plant room internal physical model is shown in FIG. 1, and different types of outflow modes are marked by red lines. Room 4 in the first layer is provided with an inflow pipe, so that room 4 can be used as a flooding starting point. Room 4 is provided with a horizontal door gap outflow mode. In addition, by adjusting the size of the pipe break, different types of water flooding initiation types can be realized. Room 5 is provided with a side wall hole and a vertical door gap outflow mode. Through the vertical door gap between room 4 and room 5 and the side wall hole between room 5 and room 6, and then through the horizontal door gap between room 6 and the stairwell, the water flooding spreading process between different rooms and different floors during the water flooding process can be effectively simulated.

[0055] In actual application, water flooding parameters can be set for each group of water flooding conditions, for example, the corresponding water flooding flow rate and water flooding time can be specifically set. The water flooding flow rate can be the outflow rate of the inflow pipe break, which can be regulated in combination with the electromagnetic flowmeter and the water supply centrifugal pump of the nuclear power plant room internal physical model.

[0056] Exemplarily, four typical water flooding conditions in a nuclear power plant room can be designed by combining different water flooding outflow types, wherein, condition one can be set as the room 4 on the first floor as the flooding starting point, the water flooding outflow types include horizontal door gap and vertical door gap, the water flooding flow rate is 1.8 m³ / h, and the water flooding duration is 30 minutes; condition two can be set as the room 2 on the second floor as the flooding starting point, the water flooding outflow types include ground hole and side wall hole after spreading to the room 5, the water flooding flow rate is 1.8 m³ / h, and the water flooding duration is 30 minutes; condition three can be set as the room 1 on the second floor as the flooding starting point, the water flooding outflow type includes horizontal door gap, the water flooding flow rate is 1.8 m³ / h, and the water flooding duration is 30 minutes, and an additional setting that when the water level in the room 1 reaches a threshold, the door between the room 1 and the room 3 is pushed open, so as to simulate the water flooding simulation process of high water pressure pushing the door; condition four can be set as the room 1 on the second floor as the flooding starting point, the water flooding starting type is water flooding spray, the water flooding flow rate is 0.033 m³ / h, and the water flooding duration is 30 minutes.

[0057] Therefore, by setting multiple groups of water flooding conditions with different types and different water flooding parameters, the unsteady flow field formed by the different outflow conditions in each group of conditions has diversity and complexity, thereby better simulating typical water flooding conditions in a nuclear power plant room under different situations such as small flow spreading, typical medium-sized break, and transient large opening.

[0058] Further, each group of water flooding conditions and corresponding water flooding parameters are recorded and stored by indexing, so as to construct a water flooding condition database of the nuclear power plant room, so that in subsequent water flooding simulation, the target water flooding condition can be quickly matched, and the nuclear power plant room internal physical model can be debugged according to the corresponding water flooding parameters.

[0059] Step 300: debugging the nuclear power plant room internal physical model according to the target water flooding condition, and simulating a water flooding simulation test of the target water flooding condition, recording the hydraulic parameters in the water flooding simulation process until the water flooding simulation test of the target water flooding condition is completed.

[0060] In the embodiment of the present application, after the target water flooding condition is determined, the nuclear power plant room internal physical model can be debugged according to the target water flooding condition and the water flooding parameters. Exemplarily, first, the water flow in the nuclear power plant room internal physical model is emptied through the drainage pipeline, the valve of the corresponding inflow pipeline is opened according to the flooding starting point in the water flooding condition, the break flow rate is matched with the water flooding flow rate through the cooperation of the electromagnetic flowmeter and the water supply centrifugal pump, and after setting the high-precision instruments to measure the flow rate, flow and water level change at the door gap / hole, the water flooding simulation test of the target water flooding condition is started, and the hydraulic parameters in the water flooding simulation process are recorded until the water flooding simulation test of the target water flooding condition is completed.

[0061] Therefore, compared with the traditional flooding analysis method mainly relying on empirical formula and simplified numerical simulation, the empirical formula is usually derived based on ideal conditions and simple geometric shapes, and it is difficult to accurately reflect the influence of complex spatial structure in the actual nuclear power plant room on the water flow path; the simplified numerical method cannot fully simulate the overturning, breaking and other flow characteristics of water under complex boundary conditions, resulting in large deviation between the prediction result and the actual situation. The internal physical model of the nuclear power plant room is constructed, the actual flooding process can be reproduced and real data can be provided, the spreading path, accumulation process and distribution state of water in the complex environment of the nuclear power plant room can be intuitively observed, and data support can be provided for safety design and emergency strategy formulation.

[0062] Optionally, as a specific embodiment, the internal physical model of the nuclear power plant room is debugged according to the target flooding condition, and a flooding simulation test of the target flooding condition is simulated and executed, and hydraulic parameters in the flooding simulation process are recorded until the flooding simulation test of the target flooding condition is completed, comprising: reading the target flooding condition and the flooding parameters corresponding to the target flooding condition, so as to debug the water inlet and the water inflow of the internal physical model of the nuclear power plant room; based on a preset flooding time length, the flooding simulation test of the target flooding condition is simulated and executed, and combined with a camera, a water level meter and a particle image velocimetry instrument, hydraulic parameters in the flooding simulation process are measured and recorded until the flooding simulation test of the target flooding condition is completed.

[0063] In the embodiment of the present application, by reading the target flooding condition and the flooding parameters corresponding to the target flooding condition, the water inlet and the water inflow of the internal physical model of the nuclear power plant room are debugged, wherein the valve of different water inlet pipes can be opened or closed, the break on the pipe is used as the water inlet, and the water inflow is detected by the electromagnetic flowmeter.

[0064] Further, based on a preset flooding time length, the flooding simulation test of the target flooding condition is simulated and executed, and combined with a camera, a water level meter and a particle image velocimetry instrument, hydraulic parameters in the flooding simulation process are measured and recorded until the flooding simulation test of the target flooding condition is completed.

[0065] In practical application, water level measuring points can be arranged in each room in the internal physical model of the nuclear power plant room, for example, a pressure water level meter can be arranged in the room on the first floor, and an ultrasonic water level meter can be arranged in the room on the second floor, so as to complete the monitoring of the water level change process. Further, the flow velocity data of each gap and hole in the flooding simulation process can be measured by the particle image velocimetry instrument, and the cross-sectional area can be calculated combined with the size of each gap and hole, so as to calculate the flow data of each gap and hole.

[0066] In practical applications, after the water-flooding simulation test of the target water-flooding working condition is completed, the method further includes: The video data captured by the camera, the water level data measured by the water level gauge and the particle image velocimetry instrument, and the flow rate data are combined to analyze the spreading path of the target water-flooding working condition.

[0067] In the embodiment of the present application, by combining the video data captured by the camera, the water level data measured by the water level gauge and the particle image velocimetry instrument, and the flow rate data, the time node at which the water level of each room changes after the water-flooding at the water-flooding starting point can be determined, so as to confirm the spreading path of the target water-flooding working condition, which can be used for verification of digital simulation test and can provide data support for safety design and emergency strategy formulation.

[0068] Please refer to Figure 7 , Figure 7 is a structural schematic diagram of a nuclear power plant room internal water-flooding simulation device provided by the embodiment of the present application. The embodiment of the present application further provides a nuclear power plant room internal water-flooding simulation device, which can implement the nuclear power plant room internal water-flooding simulation method described above. The device includes: a model construction module 710, configured to construct a nuclear power plant room internal physical model; a working condition selection module 720, configured to select a target water-flooding working condition from a preset nuclear power plant room water-flooding working condition database; a water-flooding simulation module 730, configured to debug the nuclear power plant room internal physical model according to the target water-flooding working condition, and simulate a water-flooding simulation test of the target water-flooding working condition, and record hydraulic parameters in the water-flooding simulation process until the water-flooding simulation test of the target water-flooding working condition is completed.

[0069] It can be understood that the contents in the method embodiments described above are applicable to the device embodiments, the device embodiments specifically implement the functions of the method embodiments described above, and achieve the same beneficial effects as the method embodiments described above.

[0070] Please refer to Figure 8 , Figure 8 is a hardware structural schematic diagram of an electronic device provided by the embodiment of the present application. The electronic device includes: The processor 801 can be implemented in a general-purpose CPU (Central Processing Unit), a microprocessor, an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits, and is used to execute related programs to implement the technical solutions provided by the embodiment of the present application. The memory 802 can be implemented in the form of Read Only Memory (ROM), static storage device, dynamic storage device or Random Access Memory (RAM), etc. The memory 802 can store an operating system and other application programs, and when the technical solutions provided by the embodiments of the present specification are implemented by software or firmware, the related program codes are stored in the memory 802 and are called and executed by the processor 801 to implement the above-mentioned method of the embodiments of the present application; The input / output interface 803 is configured to realize information input and output. The communication interface 804 is configured to realize the communication interaction between the device and other devices, and the communication can be realized by wired mode (for example, USB, network cable, etc.) or wireless mode (for example, mobile network, WIFI, Bluetooth, etc.). The bus 805 is configured to transmit information between various components (for example, the processor 801, the memory 802, the input / output interface 803 and the communication interface 804) of the device. The processor 801, the memory 802, the input / output interface 803 and the communication interface 804 are connected to each other through the bus 805 to realize the communication connection between them in the device.

[0071] The embodiments of the present application also provide a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the above-mentioned method.

[0072] It can be understood that the contents in the above-mentioned method embodiments are all applicable to the present storage medium embodiments, the functions specifically realized by the present storage medium embodiments are the same as those of the above-mentioned method embodiments, and the beneficial effects achieved by the present storage medium embodiments are also the same as those achieved by the above-mentioned method embodiments.

[0073] The embodiments of the present application also provide a computer program product, which includes a computer program, and the computer program is executed by a processor to realize the above-mentioned method.

[0074] It can be understood that the contents in the above-mentioned method embodiments are all applicable to the present program product embodiments, the functions specifically realized by the present program product embodiments are the same as those of the above-mentioned method embodiments, and the beneficial effects achieved by the present program product embodiments are also the same as those achieved by the above-mentioned method embodiments.

[0075] ​The memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. In addition, the memory can include a high-speed random access memory, and can also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state memory device. In some embodiments, the memory can optionally include a memory disposed remotely with respect to the processor, which can be connected to the processor through a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0076] The embodiment of the present application provides a nuclear power plant room internal flooding simulation method and related equipment. The nuclear power plant room internal flooding simulation method comprises the following steps: constructing a nuclear power plant room internal physical model; and performing a nuclear power plant room internal physical model test flooding simulation process. The nuclear power plant room internal flooding simulation method can intuitively observe the spreading path, accumulation process and distribution state of water flow in the complex environment of the nuclear power plant room, effectively improves the flooding simulation precision, and provides data support for the safety design and emergency strategy formulation of the nuclear power plant room by recording the hydraulic parameters in the flooding simulation process.

[0077] The embodiments described in the embodiments of the present application are used to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of technology and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0078] Those skilled in the art can understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and can include more or fewer steps than the figures, or combine certain steps, or different steps.

[0079] The device embodiments described above are only schematic, and the units described as separate components can or can not be physically separate, that is, can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0080] Those skilled in the art can understand that all or some of the steps in the above disclosed method, the functions of the modules / units in the system and the device can be implemented as software, firmware, hardware and their appropriate combinations.

[0081] The terms "first", "second", "third", "fourth", and the like in the description and in the claims of this application, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of the terms so termed is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of orderly or chronological mundane operation, reverse order operation, based on circuitry availability, based on stated preference or the like, and that "default" or other orderings are thus permissible. Further, the terms "comprise", "comprising", "include", "including", and the like, are specifically intended to be open-ended. That is, references to individual steps and the like do not suhstantially exclude the presence of two or more of a given step or its integral presence in the process, method, system, article, or apparatus having been made with a wider scope. The use of notation such as "first", "second", "third", etc. does not generally limit the areas, but can be used for clarity, and merely establishes the order of the steps or placement of components. Moreover, singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

[0082] It should be understood that, in the application, "at least one" means one or more, "multiple" means two or more. "And / or", used to describe the relationship between associated objects, means that there can be three relationships, for example, "A and / or B" can mean: only A, only B, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or similar expressions means any combination of these items, including single or multiple combinations. For example, at least one of a, b or c, can mean: 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.

[0083] In several embodiments provided in the application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative, for example, the division of the above-mentioned units is only a logical functional division, and actual implementation can have another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed objects can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0084] The units described above as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, i.e. they can be located in one place or distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0085] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0086] If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, essentially or in part, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes multiple instructions used to cause a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods in the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various other media that can store programs.

[0087] The preferred embodiments of the embodiments of the present application are described above with reference to the accompanying drawings, and are not limited to the scope of the embodiments of the present application. Any modifications, equivalent replacements and improvements made by those skilled in the art without departing from the scope and essence of the embodiments of the present application shall be within the scope of the embodiments of the present application.

Claims

1. A method for simulating flooding inside a nuclear power plant building, characterized in that, The method includes the following steps: Constructing a physical model of the interior of a nuclear power plant; Select the target flooding condition from the pre-set database of nuclear power plant flooding conditions; The internal physical model of the nuclear power plant is debugged according to the target flooding condition, and a flooding simulation test of the target flooding condition is performed. The hydraulic parameters during the flooding simulation process are recorded until the flooding simulation test of the target flooding condition is completed.

2. The method according to claim 1, characterized in that, The step of selecting a target flooding condition from a pre-set database of nuclear power plant flooding conditions includes: In response to the flooding condition selection command, the preset nuclear power plant flooding condition database is read; Based on the flood conditions stored in the nuclear power plant flood condition database, a matching flood condition is selected as the target flood condition according to the requirements of the flood simulation test. The requirements for the flood simulation test include the types of flooding.

3. The method according to claim 2, characterized in that, Before reading the preset nuclear power plant flooding condition database, the following steps are also included: Multiple flood conditions are set according to the type of flood initiation, the point of initiation, and the type of flood outflow. Set flooding parameters for each of the flooding conditions described in the group; A database of nuclear power plant flood conditions is constructed by recording and storing each group of flood conditions and corresponding flood parameters in an indexed manner. The flood initiation types include flooding spread and flooding spray; the flood outflow types include outflow through door gaps and outflow through holes; and the flood parameters include flood flow rate and flood duration.

4. The method according to claim 1, characterized in that, The process of debugging the internal physical model of the nuclear power plant building according to the target flooding condition, simulating the flooding test under the target flooding condition, and recording the hydraulic parameters during the flooding simulation process until the flooding simulation test under the target flooding condition is completed includes: Read the target flooding condition and the flooding parameters corresponding to the target flooding condition, and then adjust the water inlet and water flow rate of the physical model inside the nuclear power plant building; The target flooding condition is simulated and tested based on a preset flooding duration. A camera, water level gauge, and particle image velocimeter are used to measure and record the hydraulic parameters during the flooding simulation until the target flooding condition is completed.

5. The method according to claim 4, characterized in that, After completing the flood simulation test under the target flooding condition, 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 target flooding condition is analyzed.

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 device for simulating flooding inside a nuclear power plant, characterized in that, The device includes: The model building module is used to build physical models of the interior of nuclear power plants; The operating condition selection module is used to select the target flooding condition from a preset database of nuclear power plant flooding conditions. The flooding simulation module is used to debug the internal physical model of the nuclear power plant according to the target flooding condition, and to simulate and execute the flooding simulation test of the target flooding condition, record the hydraulic parameters during the flooding simulation process, until the flooding simulation test of the target flooding condition is completed.

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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