A network-based nuclear power plant transient simulation system and method

Abstract

The invention discloses a network-based nuclear power plant transient simulation system and method, the system comprises a human-computer interaction interface, a control module, a simulation experiment management module, a fast real-time simulation calculation module and a data storage module; the method comprises: reasonably dividing the systems and components of the simulated nuclear power plant, establishing a neutron dynamics model according to the target nuclear power plant systems and components, and determining the model structure parameters and operation parameters; inputting the determined model parameters into the simulation system through a web page human-computer interaction interface, then passing them to a fast real-time calculation module through other modules for steady-state calculation, and finally displaying the steady-state simulation calculation results of the nuclear power plant on the interface; recording the end time of the steady-state calculation as "0s", and then performing transient calculation; pausing the simulation system, inputting the operating condition parameters that need to be changed according to the requirements, and performing transient simulation calculation; obtaining the experimental results according to the parameter display interface or the function of exporting the experimental document, and performing simulation experiment analysis.

Description

Technical Field

[0001] The invention relates to the field of nuclear power plant accident simulation, and in particular to a network-based nuclear power plant transient simulation system and method. Background Art

[0002] Nuclear power plant simulation mainly uses modeling technology and simulation technology to obtain the operating characteristics of nuclear power plants. Modeling technology uses mathematical equations and logical control equations to describe the operating behavior and feedback of nuclear power plant system equipment, while simulation technology mainly uses computers to solve the established model equations with numerical analysis methods to obtain relevant parameter changes. Due to the particularity of the operation mode of nuclear power plants, nuclear power simulation technology plays an important role in the development of accident procedures, operator training, accident prevention and even mitigation of accident consequences.

[0003] Today's nuclear power simulation systems mainly include nuclear power simulators and engineering analysis software. Nuclear power simulators are comprehensive in function and have relatively accurate calculation results. They are divided into: training simulators (used for training and assessment of nuclear power plant staff), nuclear power engineering simulators (used for engineering design and engineering research), nuclear power plant safety analysis machines (efficient and fast safety analysis) and nuclear power simulation analysis machines (real-time analysis-level simulation analysis systems). Engineering analysis software such as RELAP5, CATHARE, COBRA, etc. are characterized by high accuracy and wide application range, and are widely used in the field of nuclear power safety analysis.

[0004] Although nuclear power simulators and engineering analysis software are widely used, they still have some shortcomings that cannot be ignored, as follows:

[0005] 1. The nuclear power simulator focuses on the training and evaluation of operator behavior. The hardware part refers to the 1:1 layout of the main control room, and the project cost is expensive.

[0006] 2. There is no data interaction interface with the unit control system, the simulation function needs to set the working conditions, and the simulation is not fast enough;

[0007] 3. The simulator uses a preset simulation algorithm, but the power plant will continue to make design changes during the construction and commissioning process, resulting in deviations between the simulator and the actual operating conditions, and reduced calculation accuracy;

[0008] 4. The engineering analysis software has no visual human-computer interaction interface, and the deduction function requires repeated setting of working conditions. The operation is cumbersome and complicated, and the calculation cost is high.

[0009] 5. Both of them do not have online functions and cannot meet the teaching and training needs of distributed personnel. Summary of the invention

[0010] In view of the problems of high calculation cost, complex operation, cumbersome debugging and lack of online simulation function in the existing nuclear power simulation technology, the present invention proposes a network-based nuclear power plant transient simulation system and method.

[0011] The present invention is achieved by adopting the following technical solutions:

[0012] A network-based nuclear power plant transient simulation system, including a human-computer interaction interface, a control module, a simulation experiment management module, a fast real-time simulation calculation module and a data storage module;

[0013] Human-computer interaction interface, used to issue various operation instructions, perform experimental operations on the system, monitor and display parameters in real time, and manage experiments;

[0014] The control module is used to extract the human-computer interaction interface information and feedback the simulation calculation results, and control the data interaction between the human-computer interaction interface and the simulation experiment management module;

[0015] The simulation experiment management module is used to receive data information from the control module, manage experimental tasks, call the fast real-time simulation calculation module, and transmit data from the data storage module to the control module;

[0016] The fast real-time simulation calculation module is used to be called by the simulation experiment management module to complete the simulation calculation and then transmit the output result to the data storage module;

[0017] The data storage module is used to save all data during the system's simulation experiment to meet the needs of interface parameter display, experimental data export and experimental data caching.

[0018] A further improvement of the present invention is that the system is developed based on the B / S architecture, and the human-computer interaction interface adopts VUE, ElementUI framework and vector SVG graphics technology, including the primary circuit operation / display interface, the secondary circuit operation / display interface, the chemical volume system and the injection system operation / display interface, the residual heat removal system operation / display interface, the key parameter real-time display interface and the experiment management interface;

[0019] Among them, the primary circuit operation / display interface is used for the initial system initial working condition selection or primary circuit state parameter input, real-time display of state parameters and triggering operation of primary circuit pumps and valves;

[0020] Secondary circuit operation / display interface, used for secondary circuit status parameter input, real-time status parameter display and triggering operation of secondary circuit pumps and valves;

[0021] The operation / display interface of the chemical volume system and the safety injection system is used for inputting the status parameters of the chemical volume system and the safety injection system, displaying the parameters in real time, and triggering the operation of the pump / valve;

[0022] The residual heat removal system operation / display interface is used for the input of residual heat removal system status parameters, real-time display of status parameters, and triggering operations of pumps and valves;

[0023] Key parameter real-time display interface, used to display key status parameters in real time, including primary circuit average temperature, pressurizer pressure and water level, loop flow, loop cold / hot section temperature, core power, core reactivity, DNBR, steam generator pressure and water level;

[0024] The experiment management interface is used to issue system experiment task management instructions, system authority management control instructions, and display the user experiment running status of the entire system.

[0025] A further improvement of the present invention is that the control module includes a template engine rendering unit and a Web data interaction unit; the template engine unit is used to extract page information and form a special data document to transmit to the server side, and the Web data interaction unit is used to perform data interaction with the server side.

[0026] A further improvement of the present invention is that the simulation experiment management module includes an experiment creation unit, an experiment management unit, a statistical analysis unit and a system setting unit;

[0027] The experiment creation unit is used to issue the following instructions to the data storage module: create experiments, submit experiment reports, and download experiment reports;

[0028] The experiment management unit is used to issue experiment approval and experiment rejection instructions to the data storage module;

[0029] Statistical analysis unit, used to provide statistical analysis and summary view of the experimental conditions of the entire system;

[0030] The system setting unit is used to provide management control of permissions, including user management, role management, organization management, and resource management.

[0031] A further improvement of the present invention is that the system setting unit includes a user management unit, a role management unit, an organization management unit and a resource management unit;

[0032] User management unit, used to provide basic information maintenance, role and organization allocation management for all system users;

[0033] The role management unit is used to provide basic information maintenance, data permissions and user management for all roles in the system;

[0034] The organization management unit is used to provide basic maintenance information of all organizations in the system;

[0035] Resource management unit, used for system resource allocation for all users of the system.

[0036] A further improvement of the present invention is that the fast real-time simulation calculation module includes physical models and input-output read-write functions corresponding to the nuclear power plant system and equipment, and the physical model includes a point reactor neutron dynamics model, a three-zone non-equilibrium pressurizer model, a steam generator lumped parameter model, and a core and loop thermal-hydraulic model.

[0037] A further improvement of the present invention is that the control module adopts a template engine rendering method, AJAX technology, POST / GET request and Websocket mechanism.

[0038] A network-based nuclear power plant transient simulation method comprises the following steps:

[0039] Step 1: Rationally divide the systems and components of the simulated nuclear power plant, establish the neutron kinetic model, pressurizer model, steam generator model, depressurization tank model, core and loop thermal hydraulic model, containment model and main pump model according to the target nuclear power plant systems and components, and determine the model structure parameters and operation parameters;

[0040] Step 2: Input the determined model parameters into the simulation system through the web human-computer interaction interface, and then pass them to the fast real-time calculation module through other modules for steady-state calculation. Finally, the interface displays the steady-state simulation calculation results of the nuclear power plant;

[0041] Step 3: record the end time of steady-state calculation as "0s", and then perform transient calculation;

[0042] Step 3: Pause the simulation system, input the operating parameters that need to be changed according to the requirements, and perform transient simulation calculations;

[0043] Step 4: Obtain the experimental results according to the parameter display interface or export experiment document function, and conduct simulation experiment analysis.

[0044] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0045] 1) Due to its network-based characteristics, the network-based nuclear power plant transient simulation system can conduct remote multi-person online teaching and training, breaking through the limitations of time and space, meeting the needs of distributed teaching and training, and reducing the teaching and training costs of professionals.

[0046] 2) The backend of the network-based nuclear power plant transient simulation system is deployed on a cloud server, so it has a stable simulation environment, and calculation errors caused by human error or personal computer failure basically do not occur. The records of network access can be called at any time, which to a certain extent avoids repeated operation of the same working conditions and improves work efficiency.

[0047] 3) The network-based nuclear power plant transient simulation system is a multi-user online real-time simulation system developed based on the B / S architecture and SpringBoot framework. It separates the front and back ends to reduce technical coupling, so it has good stability and robustness and is easy to update and debug versions.

[0048] 4) The network-based nuclear power plant transient simulation system uses a lumped parameter model for simulation calculations. Although the node division is simpler and the number of control equations is smaller than that of large-scale transient analysis software, the calculation efficiency is higher. Therefore, under a certain calculation accuracy, this system has a faster calculation speed and can perform ultra-real-time calculations, while the calculation cost is also lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a schematic structural diagram of a network-based nuclear power plant transient simulation system according to the present invention.

[0050] Figure 2 The present invention is a flowchart of a network-based nuclear power plant transient simulation method. DETAILED DESCRIPTION

[0051] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0052] Figure 1 The structure diagram of a network-based nuclear power plant transient simulation system described in the present invention is a multi-user online real-time simulation system developed based on B / S architecture and SpringBoot framework, which can be divided into two parts: server and client. Figure 1 The client side shown includes a human-computer interaction interface 100 and a control module 200, and the server side includes a simulation experiment management module 300, a fast real-time simulation calculation module 400 and a data storage module 500. Through the human-computer interaction interface 100, the user can input parameters to the system for simulation, and the control module 200 is used to complete the data transmission and information interaction between the client and the server. The experiment management module 300 is used to receive client information, manage experimental tasks, call the fast real-time calculation module 400 for simulation calculation, and store the data generated in the process in the data storage module 500, and feed back the calculation results to the human-computer interaction interface 100.

[0053] The human-computer interaction interface 100 is a browser-side operation / display interface built on a B / S architecture. This structure can perform distributed information processing, effectively reduce resource costs, and improve the overall performance of the system. Through this interface, real-time display and monitoring of parameters, real-time control parameter input, and data analysis can be performed. The interface mainly includes a primary circuit operation / display interface 101, a secondary circuit operation / display interface 102, a chemical volume system and an injection system operation / display interface 103, a residual heat removal system operation / display interface 104, a key parameter real-time display interface 105, and an experiment management interface 106.

[0054] The control module 200 includes a template engine rendering unit 201 and a Web data interaction unit 202. The template engine unit 201 is used to extract page information and form a Json data file to transmit to the server. The Web data interaction unit 202 is used to perform data interaction with the server.

[0055] It should be noted that in the Web data interaction unit 202, the AJAX technology, POST request, GET request, WebSocket mechanism, and pause / restart mechanism used in this exemplary embodiment are also key features of this system. Compared with traditional web pages that need to reload the entire page to update the content, AJAX applications can only send and retrieve the required data to the server, and exchange a small amount of data with the server in the background, thereby realizing asynchronous update of the web page, which enables the system to respond to page operations quickly. POST requests and GET requests are used to obtain / update server information according to specific functional needs. In this system, in order to improve user experience and meet server computing performance requirements, the Websocket mechanism is used to control the number of experiments to avoid server overload problems caused by high concurrency. The pause mechanism in the example system is used to determine whether to enter the calculation module according to the identifier before the simulation calculation module 400 runs, thereby realizing the pause function. The specific principle of the restart mechanism is to read the saved input file at the initial moment of the system and delete the saved calculation output file, thereby restoring the initial state of the system.

[0056] The simulation experiment management module 400 includes an experiment creation unit 301, an experiment management unit 302, and a system setting unit 303. The following instructions can be issued to the data storage module through the experiment creation unit 301: create an experiment, submit an experiment report, and download an experiment report. The experiment management unit 302 can issue experiment approval and experiment rejection instructions to the data storage module. The system setting unit 303 includes a user management unit, a role management unit, an organization management unit, a resource management unit, etc.

[0057] The fast real-time simulation calculation module 400 is an executable program exe written in C++ language, which is separated from other modules, reduces the technical coupling, and is convenient for system update and maintenance. It can be called by the simulation experiment management module 300 to complete the simulation calculation, and then the output result is transmitted to the data storage module 500 in Json file format. It should be emphasized that in this system, the simulation calculation module is separated from other modules, and data interaction can only be performed with the input and output Json files. This method is a significant feature of the present invention, and its advantages are to reduce the technical coupling, avoid various memory overflows and cross-language type conversion precision loss problems. The module mainly includes physical models and input and output read and write functions corresponding to nuclear power plant systems and equipment. The models mainly include a point pile neutron dynamics model, a three-zone non-equilibrium state regulator model, a steam generator lumped parameter model, and a core and loop thermal hydraulic model.

[0058] The data storage module 500 is used to store all data in the process of the system performing simulation experiments, meeting the requirements of interface parameter display, experimental data export, experimental data caching, etc. This part mainly adopts database technology, including MySQL system library unit 501 (mainly used to store data required by the experiment management module), Redis cache library unit 502 (used to store high-frequency access data and effectively reduce disk I / O), and MongoDB storage library unit 503 (stores a large amount of data generated by the simulation calculation module to improve the response speed of the web page).

[0059] The following will be combined Figure 2 The second technical solution proposed in the present invention, a network-based nuclear power plant transient simulation method, is described in detail.

[0060] Step 1: Rationally divide the systems and components of the simulated nuclear power plant, establish corresponding models according to the target nuclear power plant systems and components, and determine the model structure parameters and operating parameters.

[0061] Step 2: Input the determined model parameters into the simulation system through the web human-computer interaction interface, and then pass them to the fast real-time calculation module through other modules for steady-state calculation. Finally, the interface displays the steady-state simulation calculation results of the nuclear power plant.

[0062] Step 3: Record the end time of the steady-state calculation as "0s", and then perform transient simulation calculation of the nuclear power plant.

[0063] Step 3: Determine whether to suspend the simulation system, input the operating parameters that need to be changed according to the requirements, and perform transient simulation calculations.

[0064] Step 4: Complete the simulation calculation, obtain the experimental results according to the parameter display interface or export the experimental document function, and perform simulation experiment analysis.

[0065] Although the present invention has been described in detail above by general explanation and specific implementation examples, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A network-based nuclear power plant transient simulation system, characterized in that: It includes human-computer interaction interface, control module, simulation experiment management module, fast real-time simulation calculation module and data storage module; Human-computer interaction interface, used to issue various operation instructions, perform experimental operations on the system, monitor and display parameters in real time, and manage experiments; The control module is used to extract the human-computer interaction interface information and feedback the simulation calculation results, and control the data interaction between the human-computer interaction interface and the simulation experiment management module; The simulation experiment management module is used to receive data information from the control module, manage experimental tasks, call the fast real-time simulation calculation module, and transmit data from the data storage module to the control module; The fast real-time simulation calculation module is used to be called by the simulation experiment management module to complete the simulation calculation and then transmit the output result to the data storage module; The data storage module is used to save all data during the simulation experiment of the system to meet the requirements of interface parameter display, experimental data export and experimental data caching; The system is developed based on B / S architecture, and the human-computer interaction interface adopts VUE, ElementUI framework and vector SVG graphics technology, including the primary circuit operation / display interface, the secondary circuit operation / display interface, the chemical volume system and the injection system operation / display interface, the residual heat removal system operation / display interface, the key parameter real-time display interface and the experiment management interface; Among them, the primary circuit operation / display interface is used for the initial system initial working condition selection or primary circuit state parameter input, real-time display of state parameters and triggering operation of primary circuit pumps and valves; Secondary circuit operation / display interface, used for secondary circuit status parameter input, real-time status parameter display and triggering operation of secondary circuit pumps and valves; The operation / display interface of the chemical volume system and the safety injection system is used for inputting the status parameters of the chemical volume system and the safety injection system, displaying the parameters in real time, and triggering the operation of the pump / valve; The residual heat removal system operation / display interface is used for the input of residual heat removal system status parameters, real-time display of status parameters, and triggering operations of pumps and valves; Key parameter real-time display interface, used to display key status parameters in real time, including primary circuit average temperature, pressurizer pressure and water level, loop flow, loop cold / hot section temperature, core power, core reactivity, DNBR, steam generator pressure and water level; The experiment management interface is used to issue system experiment task management instructions, system authority management control instructions, and display the user experiment running status of the entire system.

2. A network-based nuclear power plant transient simulation system according to claim 1, characterized in that: The control module includes a template engine rendering unit and a Web data interaction unit; the template engine unit is used to extract page information and form a special data document to transmit to the server side, and the Web data interaction unit is used to perform data interaction with the server side.

3. The network-based nuclear power plant transient simulation system according to claim 1, characterized in that: The simulation experiment management module includes an experiment creation unit, an experiment management unit, a statistical analysis unit and a system setting unit; The experiment creation unit is used to issue the following instructions to the data storage module: create experiments, submit experiment reports, and download experiment reports; The experiment management unit is used to issue experiment approval and experiment rejection instructions to the data storage module; Statistical analysis unit, used to provide statistical analysis and summary view of the experimental conditions of the entire system; The system setting unit is used to provide management control of permissions, including user management, role management, organization management, and resource management.

4. A network-based nuclear power plant transient simulation system according to claim 3, characterized in that: The system setting unit includes a user management unit, a role management unit, an organization management unit and a resource management unit; User management unit, used to provide basic information maintenance, role and organization allocation management for all system users; The role management unit is used to provide basic information maintenance, data permissions and user management for all roles in the system; The organization management unit is used to provide basic maintenance information of all organizations in the system; Resource management unit, used for system resource allocation for all users of the system.

5. The network-based nuclear power plant transient simulation system according to claim 1, characterized in that: The fast real-time simulation calculation module includes physical models and input and output read and write functions corresponding to the nuclear power plant systems and equipment. The physical models include point reactor neutron dynamics model, three-zone non-equilibrium pressurizer model, steam generator lumped parameter model, and core and loop thermal hydraulic models.

6. A network-based nuclear power plant transient simulation system according to claim 1, characterized in that: The control module adopts template engine rendering method, AJAX technology, POST / GET request and Websocket mechanism.

7. A network-based nuclear power plant transient simulation method, characterized in that: The method is based on a network-based nuclear power plant transient simulation system as described in claim 1, and comprises the following steps: Step 1: Rationally divide the systems and components of the simulated nuclear power plant, establish the neutron kinetic model, pressurizer model, steam generator model, depressurization tank model, core and loop thermal hydraulic model, containment model and main pump model according to the target nuclear power plant systems and components, and determine the model structure parameters and operation parameters; Step 2: Input the determined model parameters into the simulation system through the web human-computer interaction interface, and then pass them to the fast real-time calculation module through other modules for steady-state calculation. Finally, the interface displays the steady-state simulation calculation results of the nuclear power plant; Step 3: record the end time of steady-state calculation as "0s", and then perform transient calculation; Step 3: Pause the simulation system, input the operating parameters that need to be changed according to the requirements, and perform transient simulation calculations; Step 4: Obtain the experimental results according to the parameter display interface or export experiment document function, and conduct simulation experiment analysis.

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