Crack simulation method of full natural circulation reactor, computing equipment and storage medium

Abstract

The invention provides a crevasse simulation method of a full natural circulation reactor, computing equipment and a storage medium, and relates to the technical field of nuclear reactors. The crevasse simulation method provided by the invention comprises the following steps: acquiring a mass conservation equation and an energy conservation equation of a crevasse simulation system; carrying out dimensionless processing on the equation set; obtaining a dimensionless parameter ratio based on the equation set subjected to dimensionless processing; determining a value of a dimensionless parameter ratio based on the target design parameter; determining a crevasse position and a crevasse size; designing a crevasse simulation system based on the value of the dimensionless parameter ratio, the crevasse position and the crevasse size; carrying out distortion evaluation on the designed crevasse simulation system; and if the distortion evaluation result does not meet the requirement, modifying the designed crevasse simulation system until the distortion evaluation result of the designed crevasse simulation system meets the requirement. According to the crevasse simulation method provided by the invention, the crevasse simulation accuracy can be improved, and the crevasse simulation method is suitable for crevasse simulation of the full natural circulation reactor.

Description

Technical Field

[0001] The present application relates to the field of nuclear reactor technology, and in particular to a breach simulation method, computing equipment and storage medium for a full natural circulation reactor. Background Art

[0002] Reactor breach accident (LOCA) is an important part of nuclear power plant safety analysis. The cause of LOCA accident is breach on different pipelines. When a LOCA accident occurs, coolant sprays out from the breach, resulting in loss of water in the primary circuit, and the core cannot be adequately cooled. In severe cases, it may cause core damage and a large amount of radioactive material release. When designing a new reactor type, it is often necessary to verify its safety system configuration through a test device, of which breach simulation is an indispensable component. For scaled-down test devices, it is also necessary to ensure that the physical phenomena of the breach simulation system are not distorted.

[0003] Existing breach simulation systems and breach simulation methods usually focus on the critical flow phenomenon at the breach. For conventional pressurized water reactors, the breach simulation has less distortion. Unlike conventional pressurized water reactors, the full natural circulation reactor places the containment in a containment pool, relying on the pool liquid cooling to remove the heat in the containment after the accident. As an important component of the accident response, the containment, in the initial stage of the accident, the mixed gas in the containment directly exchanges heat with the inner surface of the shell through condensation, convection, and radiation. The heat capacity of the shell plays a leading role in absorbing heat from the containment while the internal energy of the shell itself increases; in the latter stage of the accident, the heat capacity of the shell has tended to saturation, and the heat transfer channel from the inside of the shell through the shell to the outside of the shell has been established. At this stage, thermal resistance plays a dominant role. Therefore, for full natural circulation reactors with smaller containments, the breach phenomenon is more important to the response of the containment, and a more accurate simulation of the breach system is required. Summary of the invention

[0004] In view of this, the present application provides a breach simulation method, computing device and storage medium for a full natural circulation reactor to improve the accuracy of breach simulation.

[0005] In a first aspect, the present application provides a breach simulation method for a full natural circulation reactor, comprising:

[0006] Obtain the mass conservation equation and energy conservation equation of the breach simulation system;

[0007] Performing dimensionless processing on the mass conservation equation and the energy conservation equation;

[0008] The dimensionless parameter ratio is obtained based on the dimensionless treatment of the mass conservation equation and the energy conservation equation;

[0009] determining a value of the dimensionless parameter ratio based on a target design parameter;

[0010] Determine the breach location and breach size;

[0011] designing a breach simulation system based on the value of the dimensionless parameter ratio, the breach location, and the breach size;

[0012] Conduct distortion evaluation on the designed breach simulation system;

[0013] If the distortion evaluation result does not meet the requirements, the designed breach simulation system is modified until the distortion evaluation result of the designed breach simulation system meets the requirements.

[0014] In a possible implementation, the dimensionless parameter ratio includes at least one of a mass flow ratio between the breach simulation system and the full natural circulation reactor prototype, an inflow and outflow system mass flow ratio, an expansion ratio, an energy flow ratio, and a power ratio.

[0015] In a possible implementation manner, determining the value of the dimensionless parameter ratio based on the target design parameter includes:

[0016] For the breach critical flow phenomenon, determining that the area ratio of the breach simulation system to the full natural circulation reactor prototype is equal to the mass flow ratio;

[0017] For the breach subcritical flow phenomenon, the piping resistance ratio between the breach simulation system and the full natural circulation reactor prototype is determined to be equal to the inverse of the square of the mass flow ratio.

[0018] In a possible implementation manner, determining the value of the dimensionless parameter ratio based on the target design parameter includes:

[0019] Isothermal and isobaric simulations are performed on the breach simulation system and the full natural circulation reactor prototype to determine that the values ​​of the expansion ratio, the energy flow ratio and the power ratio are 1.

[0020] In a possible implementation, the determined breach locations include the steam zone, liquid zone, and the top high position of the startup heating pipeline of the full natural circulation reactor;

[0021] The determined breach size can cover the range from rupture type breach to double-end truncated type breach of the largest pipeline of a full natural circulation reactor.

[0022] In a possible implementation, the method further includes:

[0023] Determine that the difference between the breach equivalent value of the breach simulation system and the breach equivalent value of the full natural circulation reactor prototype is less than or equal to the equivalent threshold value, wherein the breach equivalent is the ratio of the characteristic length at the breach to the inner diameter, wherein for a rupture-type breach, the characteristic length in the breach equivalent of the full natural circulation reactor prototype is the wall thickness at the breach; for a double-end truncated breach, the characteristic length in the breach equivalent of the full natural circulation reactor prototype is the nozzle length from the pressure vessel to the breach;

[0024] A breach simulation system is also designed based on the breach equivalent value of the breach simulation system.

[0025] In a possible implementation, the performing distortion evaluation on the designed breach simulation system includes:

[0026] Determine whether the dimensionless parameter ratio of the designed breach simulation system meets the preset conditions;

[0027] In response to the dimensionless parameter ratio of the designed breach simulation system meeting the preset condition, the result of the distortion evaluation meets the requirement, otherwise, the result of the distortion evaluation does not meet the requirement;

[0028] The breach simulation system of the modified design comprises:

[0029] The designed breach simulation system is modified based on the dimensionless parameter ratio.

[0030] In one possible implementation, the designed breach simulation system includes a pressure vessel and a containment container, wherein the pressure vessel and the containment container are connected via a pipeline, wherein the pipeline is provided with a breach simulation device, a pipe resistance adjustment device and a valve, and wherein a detachable nozzle is provided in the containment container.

[0031] In a second aspect, the present application provides a computing device, including:

[0032] at least one processor; and

[0033] At least one memory having instructions stored thereon, which, when executed individually or collectively by the at least one processor, cause the computing device to perform the method according to the first aspect.

[0034] In a third aspect, the present application provides a computer storage medium having instructions stored thereon, which, when executed individually or collectively by at least one processor of a computing device, causes the computing device to execute the method described in the first aspect.

[0035] Compared with the prior art, this application has the following advantages:

[0036] The breach simulation method of the full natural circulation reactor provided in the present application includes: obtaining the mass conservation equation and the energy conservation equation of the breach simulation system; performing dimensionless processing on the mass conservation equation and the energy conservation equation; obtaining the dimensionless parameter ratio based on the dimensionless mass conservation equation and the energy conservation equation; determining the value of the dimensionless parameter ratio based on the target design parameters; determining the breach position and the breach size; designing the breach simulation system based on the value of the dimensionless parameter ratio, the breach position and the breach size; performing distortion evaluation on the designed breach simulation system; if the result of the distortion evaluation does not meet the requirements, modifying the designed breach simulation system until the distortion evaluation result of the designed breach simulation system meets the requirements. The breach simulation method provided in the present application can improve the accuracy of breach simulation and is suitable for breach simulation of full natural circulation reactors. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are included to provide a further understanding of the present application. They are included and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present application and together with the present specification serve to explain the principles of the present application. In the accompanying drawings:

[0038] Figure 1 It is a schematic flow chart of a breach simulation method for a full natural circulation reactor provided in an embodiment of the present application;

[0039] Figure 2 It is a schematic diagram of a prototype of a full natural circulation reactor provided in an embodiment of the present application;

[0040] Figure 3 It is a schematic diagram of a breach simulation system of a full natural circulation reactor provided in an embodiment of the present application;

[0041] Figure 4 It is a schematic diagram of another breach simulation system of a full natural circulation reactor provided in an embodiment of the present application;

[0042] Figure 5 It is a structural diagram of a computing device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0044] As shown in this application, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0045] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0046] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. Meanwhile, it should be understood that, for ease of description, the sizes of the individual parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0047] In addition, although the terms used in this application are selected from well-known and commonly used terms, some of the terms mentioned in this application specification may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0048] Flowcharts are used in the present application to illustrate the operations performed by the system according to the embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed accurately in order. On the contrary, the steps may be processed in reverse order or simultaneously. At the same time, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0049] Figure 1Schematic diagram of a breach simulation method for a full natural circulation reactor provided in an embodiment of the present application. Figure 1 As shown, the breach simulation method of the full natural circulation reactor includes the following steps:

[0050] Step S110: Obtain the mass conservation equation and energy conservation equation of the breach simulation system.

[0051] For example, the mass conservation equation of the breach simulation system can be expressed as:

[0052]

[0053] Where M is the total mass of the system, t is the time, is the mass flow rate into the system, is the mass flow rate out of the system.

[0054] The energy conservation equation of the breach simulation system can be expressed as:

[0055]

[0056] Where M is the total mass of the system, t is the time, e is the specific internal energy, is the heating power, is the mass flow rate into the system, is the mass flow rate out of the system, h in is the enthalpy of the inflowing fluid, h out is the enthalpy of the outflowing fluid, P is the system pressure, and V is the total volume of the system.

[0057] The change of specific internal energy e can be expressed as a partial differential form under constant pressure P and constant volume v:

[0058]

[0059] Step S120: non-dimensionalize the mass conservation equation and the energy conservation equation.

[0060] In actual operation, the equations can be dimensionally processed based on the initial conditions. The dimensionally processed mass conservation equation can be expressed as:

[0061]

[0062] in:

[0063]

[0064] The superscript + indicates the corresponding dimensionless parameter (the same below), and the subscript 0 indicates the initial condition (the same below), that is, the state at time t = 0. τ m is the relaxation time. mis the mass transfer coefficient, Π m It can be expressed as:

[0065]

[0066] The dimensionless energy conservation equation can be expressed as:

[0067]

[0068] Among them, ε is the fluid expansion coefficient; h is the energy transfer coefficient; q is the source power coefficient.

[0069] Π ε It can be expressed as:

[0070]

[0071] Π h It can be expressed as:

[0072]

[0073] Π q It can be expressed as:

[0074]

[0075] Step S130: Obtain a dimensionless parameter ratio based on the dimensionless processed mass conservation equation and energy conservation equation.

[0076] Based on the dimensionless mass conservation equation and energy conservation equation in step S120, a dimensionless parameter ratio can be obtained. In some embodiments, the dimensionless parameter ratio includes at least one of a mass flow ratio between the breach simulation system and the full natural circulation reactor prototype, a mass flow ratio between the inflow and outflow systems, an expansion ratio, an energy flow ratio, and a power ratio.

[0077] For example, the mass flow ratio M of the breach simulation system and the full natural circulation reactor prototype is R It can be expressed as:

[0078]

[0079] M R is the mass flow rate ratio between the breach simulation system and the full natural circulation reactor prototype, characterizing the breach discharge flow rate ratio between the breach simulation system and the full natural circulation reactor prototype. Wherein, the subscript R represents the ratio between the breach simulation system and the full natural circulation reactor prototype (the same below).

[0080] Accordingly, the mass flow ratio of inflow and outflow of the system can be expressed as (Π m )R , characterizing the mass transfer ratio between the breach simulation system and the full natural circulation reactor prototype; the expansion ratio can be expressed as (Π ε ) R , characterizing the fluid expansion ratio between the breach simulation system and the full natural circulation reactor prototype; the energy flow ratio can be expressed as (Π h ) Rr , characterizing the energy transfer ratio between the breach simulation system and the full natural circulation reactor prototype; the power ratio can be expressed as (Π q ) R , characterizing the source term power ratio between the breach simulation system and the full natural circulation reactor prototype.

[0081] Step S140: Determine the value of the dimensionless parameter ratio based on the target design parameter.

[0082] In actual operation, isothermal and isobaric simulations can be performed on the breach simulation system and the full natural circulation reactor prototype to determine that the expansion ratio, energy flow ratio, and power ratio are 1, thereby reducing the amount of calculation. In some other embodiments, the expansion ratio, energy flow ratio, and power ratio can also be determined to be 1 through other simulation methods.

[0083] In some embodiments, for the breach critical flow phenomenon, the area ratio of the breach simulation system to the full natural circulation reactor prototype is determined to be equal to the mass flow ratio M R For the breach subcritical flow phenomenon, the piping resistance ratio between the breach simulation system and the full natural circulation reactor prototype is determined to be equal to the mass flow ratio M R The reciprocal of the square of . It can take into account the simulation of breach critical flow and subcritical flow phenomena, and improve the accuracy of breach simulation.

[0084] Step S150: determine the breach position and breach size.

[0085] After completing the above steps S110 to S140, the breach position and breach size can be determined according to the design features of the full natural circulation reactor prototype. For example, the determined breach position includes the steam zone, liquid zone and the top high position of the startup heating pipeline of the full natural circulation reactor, and the determined breach size can cover the rupture type breach to the double-end truncated breach of the largest pipeline of the full natural circulation reactor.

[0086] In some embodiments, it is also determined that the difference between the breach equivalent value of the breach simulation system and the breach equivalent value of the full natural circulation reactor prototype is less than or equal to the equivalent threshold value, and the breach simulation system is designed based on the breach equivalent value of the breach simulation system to improve the similarity between the breach simulation system and the full natural circulation reactor prototype, thereby improving the accuracy of the breach simulation. The breach equivalent can be expressed as L / D, where L is the characteristic length of the breach and D is the inner diameter of the breach. Please refer to Figure 2For the rupture type breach, the characteristic length L in the breach equivalent of the full natural circulation reactor prototype is the wall thickness Ls at the breach. For the double-ended truncated breach, the characteristic length L in the breach equivalent of the full natural circulation reactor prototype is the nozzle length L from the pressure vessel to the breach. d .

[0087] Step S160: designing a breach simulation system based on the value of the dimensionless parameter ratio, the breach position and the breach size.

[0088] In some embodiments, please refer to Figure 3-Figure 4 The designed breach simulation system includes a pressure vessel 310 and a containment vessel 320, and the pressure vessel 310 and the containment vessel 320 are connected by a pipeline 330. A breach simulation device 340, a pipe system resistance adjustment device 350 and a valve 360 ​​are provided on the pipeline 330, and the relative positions of the breach simulation device 340, the pipe system resistance adjustment device 350 and the valve 360 ​​can be set according to requirements. A detachable nozzle 370 is provided in the containment vessel 320. The breach simulation device 340 can be a detachable venturi tube or nozzle or other device, and the pipe system resistance adjustment device 350 can be an adjustable resistance member or an adjustable orifice plate or other device. The breach equivalent L1 / D1 value of the breach simulation device 340 is equal to the breach equivalent value of the breach simulation system determined in the above steps. The pipe system resistance of the breach simulation system is adjusted by the pipe system resistance adjustment device 350 to meet the simulation requirements of the breach subcritical flow phenomenon and improve the accuracy of the breach simulation.

[0089] In the breach simulation system, the pressure vessel 310 and the containment vessel 320 are arranged separately and connected by a pipe 330. The pipe 330 of the breach simulation system can be as consistent as possible with the direction (horizontal, vertical) of the full natural circulation reactor prototype to reduce the use of elbows in order to adjust the resistance.

[0090] Step S170: performing distortion evaluation on the designed breach simulation system.

[0091] The purpose of distortion evaluation is to assess the distortion caused by the geometric dimensions, boundary conditions and operating conditions of the breach simulation system.

[0092] In some embodiments, performing distortion evaluation on the designed breach simulation system includes: determining whether the dimensionless parameter ratio of the designed breach simulation system meets a preset condition, and in response to the dimensionless parameter ratio of the designed breach simulation system meeting the preset condition, the result of the distortion evaluation meets the requirement, otherwise, the result of the distortion evaluation does not meet the requirement. For example, the distortion degree can be expressed as:

[0093]

[0094] Among them, DF is the distortion; is the target parameter to be evaluated, which is the dimensionless parameter ratio mentioned above.

[0095] When the distortion degree DF is within a preset threshold range, it means that the result of the distortion evaluation meets the requirement, otherwise, the result of the distortion evaluation does not meet the requirement.

[0096] Step S180: If the distortion evaluation result does not meet the requirement, modify the designed breach simulation system until the distortion evaluation result of the designed breach simulation system meets the requirement.

[0097] In actual operation, the designed breach simulation system can be modified based on the dimensionless parameter ratio. For example, the mass flow ratio M R If the distortion evaluation requirements are not met, then based on the mass flow ratio M R The corresponding design parameters of the breach simulation system are adjusted according to the influencing factors until the mass flow ratio M R Meet the distortion evaluation requirements.

[0098] Figure 5 Schematic diagram of a computing device provided in an embodiment of the present application. Figure 5 As shown, computing device 500 includes one or more processors 510 , one or more memories 520 coupled to processor 510 , and one or more communication modules 540 coupled to processor 510 .

[0099] The communication module 540 is used for two-way communication. The communication module 540 has at least one antenna to facilitate communication. The communication interface may represent any interface necessary for communicating with other network elements.

[0100] Processor 510 may be of any type suitable for the local technology network, and may include, as non-limiting examples, one or more of: a general purpose computer, a special purpose computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor architecture. Computing device 500 may have multiple processors, such as application specific integrated circuit chips, which are driven in time to a clock that synchronizes a master processor.

[0101] The memory 520 may include one or more non-volatile memories and one or more volatile memories. Examples of non-volatile memories include, but are not limited to, read-only memory (ROM) 524, electrically programmable read-only memory (EPROM), flash memory, hard disk, compact disk (CD), digital video disk (DVD), and other magnetic and / or optical memories. Examples of volatile memories include, but are not limited to, random access memory (RAM) 522 and other volatile memories that do not persist during the duration of a power outage.

[0102] Computer program 530 includes computer executable instructions executed by associated processor 510. Program 530 may be stored in ROM 524. Processor 510 may perform any appropriate actions and processes by loading program 530 into RAM 522.

[0103] The embodiment of the present application can be implemented by program 530, so that the computing device 500 can execute the reference Figure 1 Any process disclosed in the discussion. The embodiments of the present application may also be implemented by hardware or by a combination of software and hardware.

[0104] In some embodiments, program 530 may be tangibly embodied in a computer-readable medium, which may be contained in computing device 500 (e.g., memory 520) or other storage devices accessible to computing device 500. Computing device 500 may load program 530 from the computer-readable medium to RAM 522 for execution. The computer-readable medium may include any type of tangible non-volatile memory, such as ROM, EPROM, flash memory, hard disk, CD, DVD, etc. The computer-readable medium has program 530 stored thereon.

[0105] Generally, various embodiments of the present application may be implemented in hardware or dedicated circuits, software, logic, or any combination thereof. Certain aspects may be implemented in hardware, while other aspects may be implemented in firmware or software, which may be performed by a controller, microprocessor, or other computing device. Although various aspects of the embodiments of the present application are shown and described as block diagrams, flow charts, or using some other graphical representations, it should be understood that, as non-limiting examples, the blocks, devices, systems, techniques, or methods described herein may be implemented in hardware, software, firmware, dedicated circuits or logic, general hardware or controllers or other computing devices, or some combination thereof.

[0106] The present application also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer executable instructions, such as instructions included in program modules, which are executed in a device on a target real or virtual processor to perform the above-mentioned reference Figure 1 The method described. Typically, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform specific tasks or implement specific abstract data types. In various embodiments, the functions of program modules can be combined or separated between program modules as needed. Machine executable instructions for program modules can be executed in local or distributed devices. In distributed devices, program modules can be located in local and remote storage media.

[0107] The program code for executing the method of the present application can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer or other programmable data processing equipment so that when the program code is executed by the processor or controller, the function / operation specified in the flow chart and / or the block diagram is realized. The program code can be executed completely on the machine as an independent software package, partially on the machine, partially on the machine, partially on a remote machine, partially on a remote machine, or all on a remote machine or server.

[0108] In the context of this application, computer program codes or related data may be carried by any appropriate carrier to enable a device, apparatus or processor to perform various processes and operations as described above. Examples of carriers include signals, computer readable media, etc.

[0109] The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or apparatuses, or any suitable combination of the foregoing. More specific examples of computer readable storage media include an electrical connection with one or more wires, a portable computer floppy disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0110] In addition, although the operations are described in a specific order, this should not be construed as requiring to perform these operations in the specific order or sequence shown, or to perform all the operations shown, to obtain the desired result. In some cases, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the above discussion, these details should not be interpreted as limiting the scope of the application, but can be interpreted as a description of the specific features of a particular embodiment. Some of the features described in the context of a separate embodiment may also be implemented in combination in a single embodiment. On the contrary, the various features described in the context of a single embodiment may also be implemented in multiple embodiments individually or in any suitable sub-combination.

[0111] Although the present application has been described in language specific to structural features and / or methodological acts, it should be understood that the present application defined in the appended claims is not necessarily limited to the specific features or acts described above. Instead, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

1. A breach simulation method for a full natural circulation reactor, characterized in that: include: Obtain the mass conservation equation and energy conservation equation of the breach simulation system; Performing dimensionless processing on the mass conservation equation and the energy conservation equation; The dimensionless parameter ratio is obtained based on the dimensionless treatment of the mass conservation equation and the energy conservation equation; determining a value of the dimensionless parameter ratio based on a target design parameter; Determine the breach location and breach size; designing a breach simulation system based on the value of the dimensionless parameter ratio, the breach location, and the breach size; Conduct distortion evaluation on the designed breach simulation system; If the distortion evaluation result does not meet the requirements, the designed breach simulation system is modified until the distortion evaluation result of the designed breach simulation system meets the requirements.

2. The method according to claim 1, characterized in that The dimensionless parameter ratio includes at least one of a mass flow ratio between the breach simulation system and the full natural circulation reactor prototype, a mass flow ratio of the inflow and outflow systems, an expansion ratio, an energy flow ratio, and a power ratio.

3. The method according to claim 2, characterized in that Determining the value of the dimensionless parameter ratio based on the target design parameter includes: For the breach critical flow phenomenon, determining that the area ratio of the breach simulation system to the full natural circulation reactor prototype is equal to the mass flow ratio; For the breach subcritical flow phenomenon, the piping resistance ratio between the breach simulation system and the full natural circulation reactor prototype is determined to be equal to the inverse of the square of the mass flow ratio.

4. The method according to claim 2, characterized in that Determining the value of the dimensionless parameter ratio based on the target design parameter includes: Isothermal and isobaric simulations are performed on the breach simulation system and the full natural circulation reactor prototype to determine that the values ​​of the expansion ratio, the energy flow ratio and the power ratio are 1.

5. The method according to claim 1, characterized in that The confirmed breach locations include the steam zone, liquid zone and the top high position of the startup heating pipeline of the full natural circulation reactor; The determined breach size can cover the range from rupture type breach to double-end truncated type breach of the largest pipeline of a full natural circulation reactor.

6. The method according to claim 1, characterized in that Also includes: Determine that the difference between the breach equivalent value of the breach simulation system and the breach equivalent value of the full natural circulation reactor prototype is less than or equal to the equivalent threshold value, wherein the breach equivalent is the ratio of the characteristic length at the breach to the inner diameter, wherein for a rupture-type breach, the characteristic length in the breach equivalent of the full natural circulation reactor prototype is the wall thickness at the breach; for a double-end truncated breach, the characteristic length in the breach equivalent of the full natural circulation reactor prototype is the nozzle length from the pressure vessel to the breach; A breach simulation system is also designed based on the breach equivalent value of the breach simulation system.

7. The method according to claim 1, characterized in that The distortion evaluation of the designed breach simulation system includes: Determine whether the dimensionless parameter ratio of the designed breach simulation system meets the preset conditions; In response to the dimensionless parameter ratio of the designed breach simulation system meeting the preset condition, the result of the distortion evaluation meets the requirement, otherwise, the result of the distortion evaluation does not meet the requirement; The breach simulation system of the modified design comprises: The designed breach simulation system is modified based on the dimensionless parameter ratio.

8. The method according to claim 1, characterized in that The designed breach simulation system includes a pressure vessel and a containment container, wherein the pressure vessel and the containment container are connected via a pipeline, wherein a breach simulation device, a pipe resistance adjustment device and a valve are provided on the pipeline, and a detachable nozzle is provided in the containment container.

9. A computing device, characterized in that include: at least one processor; as well as At least one memory having instructions stored thereon, which, when executed individually or collectively by the at least one processor, cause the computing device to perform the method according to any one of claims 1 to 8.

10. A computer storage medium, characterized in that: The computer storage medium stores instructions, which, when executed individually or collectively by at least one processor of a computing device, cause the computing device to perform the method according to any one of claims 1 to 8.

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