Thermal analysis model establishment method and device and containment integrity analysis method and system

Abstract

The invention discloses a thermotechnical analysis model establishment method and device and a containment integrity analysis method and system, and relates to the technical field of nuclear industry. The establishment method comprises the following steps: acquiring a room model; according to the room model, a control body surface form, a flow channel form and a heat absorption structure form are determined; determining a thermotechnical analysis model input file according to the control body surface form, the flow channel form and the heat absorption structure form; and establishing the thermotechnical analysis model according to the thermotechnical analysis model input file. According to the embodiment of the invention, the thermotechnical analysis model can be accurately and quickly established, so that the working efficiency of designers can be improved.

Description

Technical Field

[0001] This application belongs to the field of nuclear industry technology, specifically relating to a method and apparatus for establishing a thermal analysis model, and a method and system for containment integrity analysis. Background Technology

[0002] In related technologies, thermal analysis models for nuclear island plants are typically built based on experience. Specifically, professionals estimate parameters such as volume and surface area of ​​the systems and equipment they are responsible for based on their own experience, and then construct thermal analysis models. However, this method is significantly affected by human factors, resulting in a need to improve the accuracy of model building. Summary of the Invention

[0003] The technical problem to be solved by this application is to address the above-mentioned shortcomings of the existing technology by providing a method and apparatus for establishing a thermal analysis model, and a method and system for analyzing the integrity of a containment structure. Using this method, a thermal analysis model can be established accurately and quickly, thereby improving the work efficiency of designers.

[0004] In a first aspect, embodiments of this application provide a method for establishing a thermal analysis model, applied to a nuclear island plant, the method comprising: Obtain the room model; Based on the room model, determine the control volume form, flow channel form, and heat absorption structure form. The control volume form includes at least one of the following: room building volume, equipment volume intersecting with the room volume, free volume, room floor elevation, room height, room hydraulic diameter, and room flow area. The flow channel form includes at least one of the following: first side room number, first side floor elevation, first side height, second side room number, second side floor elevation, second side height, flow channel area, flow channel hydraulic diameter, inertial length, and penetration length; the first side room number is less than or equal to the second side room number. The heat absorption structure form includes at least one of the following: third side room number, fourth side room number, heat absorption structure surface type, heat absorption structure thickness or volume, heat absorption structure area, and heat absorption structure material; the third side room number is less than or equal to the fourth side room number. Based on the control body form, flow channel form, and heat absorption structure form, determine the input file for the thermal analysis model; A thermal analysis model is established based on the input file of the thermal analysis model.

[0005] In some embodiments of the first aspect, the control volume form, flow channel form, and heat absorption structure form are determined based on a room model, including: Based on the room model, determine the basic room information, room location information, and wall information; Based on the basic room information, the control body form is obtained; Based on the room location information and wall information, the flow channel form and heat absorption structure form are obtained.

[0006] In some implementations of the first aspect, based on a room model, basic room information, room location information, and wall information are determined, including: Based on the room model, basic room information, room location information, and wall information are obtained through object collision.

[0007] In some implementations of the first aspect, before obtaining basic room information, room location information, and wall information through object collision based on a room model, the method further includes: Remove irrelevant items from the room model to obtain the room model after removal; Based on the room model, basic room information, room location information, and wall information are obtained through object collision detection, including: Based on the culled room model, basic room information, room location information, and wall information are obtained through object collision detection.

[0008] In some embodiments of the first aspect, the thermal analysis model input file is determined based on the control volume form, the flow channel form, and the heat absorption structure form, including: The heat-absorbing structure form is simplified to obtain the simplified heat-absorbing structure form; the simplified heat-absorbing structure form includes the single-sided surface area of ​​the simplified heat-absorbing structure and the thickness of each heat-absorbing structure material. Based on the control body form, flow channel form, and simplified heat absorption structure form, determine the input file for the thermal analysis model.

[0009] In some embodiments of the first aspect, the heat-absorbing structure form is simplified to obtain a simplified heat-absorbing structure form, including: Obtain the structural characteristics of the heat-absorbing structure; Based on the structural characteristics, the heat absorption structure form is simplified to obtain the simplified heat absorption structure form.

[0010] In some embodiments of the first aspect, the heat-absorbing structure form is simplified according to structural characteristics to obtain a simplified heat-absorbing structure form, including: When the structure is simple, the thickness of the heat-absorbing structure material is determined based on the thickness of the main material of the heat-absorbing structure, and the ratio of the total volume of the heat-absorbing structure to the thickness of the heat-absorbing structure material is determined as the single-sided surface area of ​​the simplified heat-absorbing structure; the thickness of the main material and the total volume of the heat-absorbing structure are determined according to the form of the heat-absorbing structure. In cases where the structure is complex, half of the total surface area corresponding to the heat-absorbing structure is determined as the single-sided surface area of ​​the simplified heat-absorbing structure, and the ratio of the total volume of the heat-absorbing structure to the single-sided surface area of ​​the simplified heat-absorbing structure is determined as the thickness of the heat-absorbing structure material; the total surface area corresponding to the heat-absorbing structure is determined according to the heat-absorbing structure form.

[0011] Based on the same inventive concept, in a second aspect, embodiments of this application also provide a containment integrity analysis method, applied to a nuclear island plant, the method comprising: Establish a thermal analysis model according to the thermal analysis model establishment method of any one of the first aspects; Based on the thermal analysis model, an integrity analysis of the containment structure is performed.

[0012] Based on the same inventive concept, in a third aspect, embodiments of this application also provide a thermal analysis model establishment apparatus, applied to a nuclear island plant, the apparatus comprising: The first acquisition module is used to acquire the room model; The first determining module is used to determine the control volume form, flow channel form, and heat absorption structure form based on the room model. The control volume form includes at least one of the following: room building volume, equipment volume intersecting with the room volume, free volume, room bottom elevation, room height, room hydraulic diameter, and room flow area. The flow channel form includes at least one of the following: first side room number, first side bottom elevation, first side height, second side room number, second side bottom elevation, second side height, flow channel area, flow channel hydraulic diameter, inertial length, and penetration length; the first side room number is less than or equal to the second side room number. The heat absorption structure form includes at least one of the following: third side room number, fourth side room number, heat absorption structure surface type, heat absorption structure thickness or volume, heat absorption structure area, and heat absorption structure material; the third side room number is less than or equal to the fourth side room number. The second determination module is used to determine the input file for the thermal analysis model based on the control body form, the flow channel form, and the heat absorption structure form. The first module is used to build a thermal analysis model based on the input file of the thermal analysis model.

[0013] Based on the same inventive concept, in a fourth aspect, embodiments of this application also provide a containment integrity analysis system applied to a nuclear island plant, the system comprising: The third aspect is the thermal analysis model establishment device, which is used to establish a thermal analysis model; The analytical apparatus is used to perform containment integrity analysis based on a thermal analysis model.

[0014] Based on the same inventive concept, in a fifth aspect, embodiments of this application provide an electronic device, the electronic device comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores one or more computer programs executable by the at least one processor, the one or more computer programs being executed by the at least one processor to enable the at least one processor to perform the above-described thermal analysis model establishment method or containment integrity analysis method.

[0015] Based on the same inventive concept, in a sixth aspect, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the above-described thermal analysis model establishment method or containment integrity analysis method.

[0016] Based on the same inventive concept, in a seventh aspect, embodiments of this application provide a computer program product that includes computer-readable code or a non-volatile computer-readable storage medium carrying computer-readable code. When the computer-readable code is run in the processor of an electronic device, the processor in the electronic device executes the above-described thermal analysis model establishment method or containment integrity analysis method.

[0017] According to the thermal analysis model establishment method and apparatus, and containment integrity analysis method and system provided in the embodiments of this application, a room model is first obtained; then, based on the room model, the control body form, flow channel form, and heat absorption structure form are determined; then, based on the control body form, flow channel form, and heat absorption structure form, the thermal analysis model input file is determined; and finally, based on the thermal analysis model input file, the thermal analysis model is established. In other words, in the embodiments of this application, the control body form, flow channel form, and heat absorption structure form are determined through the room model, i.e., based on standardized data and using standardized processes, the basic data used to establish the thermal analysis model is determined. Compared to thermal analysis models based on experience in related technologies, the embodiments of this application can accurately and quickly establish thermal analysis models, thereby improving the work efficiency of designers.

[0018] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the embodiments of the present application to explain the application and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the detailed example embodiments described with reference to the accompanying drawings, in which: Figure 1 This illustration shows a flowchart of a method for establishing a thermal analysis model provided in an embodiment of this application. Figure 2 This illustration shows another flowchart of the thermal analysis model establishment method provided in the embodiments of this application; Figure 3 This is a schematic diagram of a thermal analysis model establishment device provided in an embodiment of this application; Figure 4 This illustration shows a structural diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of this application, exemplary embodiments of this application are described below in conjunction with the accompanying drawings, including various details of the embodiments of this application to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0021] Where there is no conflict, the various embodiments of this application and the features thereof may be combined with each other.

[0022] As used herein, the term “and / or” includes any and all combinations of one or more related enumerated entries.

[0023] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. As used herein, the singular forms “a” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that when the terms “comprising” and / or “made of” are used in this specification, the presence of the stated feature, integral, step, operation, element, and / or component is specified, but the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof is not excluded. Terms such as “connected” or “linked” are not limited to physical or mechanical connections but can include electrical connections, whether direct or indirect.

[0024] Unless otherwise specified, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this application, and will not be interpreted as having an idealized or overly formal meaning, unless expressly so defined herein.

[0025] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0026] Before introducing the thermal analysis model establishment method provided in the embodiments of this application, the relevant technologies involved in the embodiments of this application will be explained first.

[0027] As described in the background section, in related technologies, the thermal analysis model of a nuclear island building, established based on experience, involves various professionals estimating parameters such as the volume and surface area of ​​the systems and equipment they are responsible for. This results in an analytical model for the thermal-hydraulic response of the nuclear island building after an accident, i.e., a nuclear island building thermal analysis model. This model includes the total free volume of the nuclear island building, the surface area and thickness of the components (i.e., heat-absorbing structures), and the flow area of ​​the connecting channels (i.e., flow paths) between rooms. The heat-absorbing structures include: concrete walls, floors, steel-clad walls, and steel structures of various thicknesses. The geometric data acquisition process for this model has poor traceability and is set by each professional based on engineering experience. For example, free volume equals building volume minus equipment volume. When obtaining building volume, the floor area of ​​each room is obtained from 2D drawings, and the building volume of each room is calculated based on its height. This method typically uses a point-based enclosing method to obtain the floor area, which introduces some error, and the error value varies for each type of room. When obtaining equipment volume, only the volume of the main equipment has a relatively accurate value; there is no unified method for estimating auxiliary items, and each profession relies on its own experience to make judgments. This method is significantly affected by human factors, leading to a need to improve the accuracy of model building.

[0028] The thermal analysis model establishment method provided in this application is applied to nuclear island plants and can be used in processes such as containment integrity analysis of nuclear island plants. This thermal analysis model establishment method can be executed by a thermal analysis model establishment device and electronic equipment. The following description uses the execution of this thermal analysis model establishment method by electronic equipment as an example.

[0029] like Figure 1 As shown, the thermal analysis model establishment method provided in this application includes steps S110 to S140.

[0030] S110, Obtain the room model.

[0031] S120. Based on the room model, determine the control volume form, flow channel form, and heat absorption structure form; the control volume form includes at least one of the following: room building volume, equipment volume intersecting with the room volume, free volume, room bottom elevation, room height, room hydraulic diameter, and room flow area; the flow channel form includes at least one of the following: first side room number, first side bottom elevation, first side height, second side room number, second side bottom elevation, second side height, flow channel area, flow channel hydraulic diameter, inertial length, and penetration length; the first side room number is less than or equal to the second side room number; the heat absorption structure form includes at least one of the following: third side room number, fourth side room number, heat absorption structure surface type, heat absorption structure thickness or volume, heat absorption structure area, and heat absorption structure material; the third side room number is less than or equal to the fourth side room number.

[0032] S130. Determine the input file for the thermal analysis model based on the control body form, flow channel form, and heat absorption structure form.

[0033] S140. Establish a thermal analysis model based on the thermal analysis model input file.

[0034] According to the thermal analysis model establishment method provided in this application embodiment, a room model is first obtained; then, based on the room model, the control body form, flow channel form, and heat absorption structure form are determined; next, based on the control body form, flow channel form, and heat absorption structure form, the thermal analysis model input file is determined; and finally, based on the thermal analysis model input file, the thermal analysis model is established. In other words, in this application embodiment, the control body form, flow channel form, and heat absorption structure form are determined through the room model, i.e., based on standardized data and using a standardized process, the basic data used to establish the thermal analysis model is determined. Compared to thermal analysis models based on experience in related technologies, this application embodiment can accurately and quickly establish a thermal analysis model, thereby improving the work efficiency of designers.

[0035] The specific implementation methods for each of the above steps are described below.

[0036] In step S110, for example, the room model can be a control body used for thermal-hydraulic calculations based on room objects in the three-dimensional design model within the thermal analysis system of the nuclear island plant, after data extraction and parameterization. In other words, the room model is a calculation control body representing a single room space in the thermal analysis model of the nuclear island plant.

[0037] For example, a room model can be determined in response to a first input operation by a user based on an electronic device. The first input operation may be an operation of inputting a room model. Alternatively, a room model may be pre-stored in the electronic device for subsequent retrieval.

[0038] In other words, select the room object (i.e., the room model) and add the room model required in the thermal analysis model.

[0039] It should be noted that, in the embodiments of this application, there may be multiple room models.

[0040] In step S120, for example, the free volume can be obtained by subtracting the volume of equipment that intersects with the volume of the room from the room's building volume.

[0041] For example, the room circulation area is the area of ​​the room along its height.

[0042] For example, the hydraulic diameter of a room is the hydraulic diameter corresponding to the room's circulation area. The room's hydraulic diameter can be calculated from the room's circulation area and perimeter.

[0043] For example, the first side room number and the second side room number are the room numbers on both sides of the flow channel. Specifically, the first side room number is the room number on the side with the smaller flow channel room number; the second side room number is the room number on the side with the larger flow channel room number. The flow channel may include door openings, window openings, object openings, etc.

[0044] For example, if the second room number is a boundary or atmospheric environment, it can be represented by a special number, such as 9999.

[0045] For example, the bottom elevation of the first side is the bottom elevation of the flow channel corresponding to the first side.

[0046] For example, the height of the first side is the height of the flow channel corresponding to the first side.

[0047] For example, the second side bottom elevation is the bottom elevation of the flow channel corresponding to the second side.

[0048] For example, the height of the second side is the height of the flow channel corresponding to the second side.

[0049] For example, the hydraulic diameter of the flow channel is the hydraulic diameter of the flow channel cross section.

[0050] For example, the flow area of ​​the flow channel is the flow area corresponding to the flow channel.

[0051] For example, the inertial length is the distance between the geometric centers of the two rooms on either side of the flow channel.

[0052] For example, the through length is the length of the flow channel itself.

[0053] It should be added that for horizontal passages, such as doorways, where the heights of the rooms on both sides of the passage are the same or not significantly different, and the bottom elevations of the passage on both sides are not significantly different, the bottom elevations of the first and second sides are based on the actual elevations, and the heights of the first and second sides are based on the actual heights. For vertical passages, such as holes in the floor of a room, where the first and second side rooms are arranged vertically, the elevation of the passage on the lower side (i.e., the bottom elevation of the first side room) is approximately the same as the top elevation of the room, equal to the top elevation minus a fixed value, and the height of the passage on that side (i.e., the height of the first side room) is equal to this fixed value; the elevation of the passage on the upper side (i.e., the bottom elevation of the second side room) is equal to the bottom elevation of the room, and the height of the passage (i.e., the height of the second side room) is equal to the aforementioned fixed value.

[0054] For example, the heat-absorbing structure may include concrete walls, concrete floors, steel gratings, equipment supports, etc.

[0055] For example, the room numbers on the third and fourth sides are the room numbers on both sides of the heat-absorbing structure. Specifically, the room number on the third side is the room number on the side with the smaller room number of the heat-absorbing structure; the room number on the fourth side is the room number on the side with the larger room number of the heat-absorbing structure.

[0056] For example, the heat-absorbing structure surface type includes vertical or horizontal.

[0057] It should be noted that for items such as concrete walls, floors, and steel gratings, the room numbers on both sides of such heat-absorbing structures are usually different. Generally, the room number on the third side refers to the side with the smaller room number, and the corresponding surface type of the heat-absorbing structure is vertical or horizontal. For items such as equipment brackets, such heat-absorbing structures are usually located in one room, so the room number on the third side is the same as the room number on the fourth side, and the surface type of the heat-absorbing structure is generally vertical.

[0058] For example, there is generally only one type of heat-absorbing structure: either the thickness or the volume. The thickness is obtained first from the data acquired from the 3D platform. If the heat-absorbing structure does not contain this feature value (i.e., the thickness), then the volume is given.

[0059] For example, the area of ​​the heat-absorbing structure is generally the total surface area.

[0060] For example, the heat-absorbing structural material is typically concrete or metal.

[0061] In some implementations, based on the room model, the control volume form, flow channel form, and heat absorption structure form are determined, including: Based on the room model, determine the basic room information, room location information, and wall information; Based on the basic room information, the control body form is obtained; Based on the room location information and wall information, the flow channel form and heat absorption structure form are obtained.

[0062] For example, basic room information includes room number, room name, room length, width, and height, information on items contained within the room, and room boundaries (such as walls, floors, and doors and windows). Item information includes the item number, name, size, and material of each item (such as equipment). For example, room location information includes the relative location of the room, that is, the room numbers on both sides of the flow channel.

[0063] For example, wall information includes wall thickness and the area, height, and perimeter of flow channels (door openings, window openings, and object openings, etc.) on the wall.

[0064] In some examples, based on the room model, basic room information, room location information, and wall information are determined, including: Based on the room model, basic room information, room location information, and wall information are obtained through object collision.

[0065] For example, a containment thermal-hydraulic evaluation model data extraction module can be added to the AVEVA E3d software, and then based on this module, basic room information, room location information, and wall information can be obtained through object collision.

[0066] For example, the containment thermal-hydraulic evaluation model data extraction module of AVEVA E3d software can be used to process the basic information of the room to obtain the control volume form.

[0067] For example, the containment thermal-hydraulic evaluation model data extraction module of AVEVA E3d software can be used to process the room location information and wall information to obtain the flow channel form and the heat absorption structure form.

[0068] In some examples, before obtaining basic room information, room location information, and wall information through object collision based on a room model, the method further includes: Remove irrelevant items from the room model to obtain the room model after removal; Based on the room model, basic room information, room location information, and wall information are obtained through object collision detection, including: Based on the culled room model, basic room information, room location information, and wall information are obtained through object collision detection.

[0069] For example, after obtaining a room model, the obtained room model can be displayed on the interface of an electronic device; then, in response to a user's removal operation based on the electronic device's interface, irrelevant items in the room model can be removed, resulting in a room model with removed items. The removal operation can be an operation by the user to remove irrelevant items from the room model; for example, the removal operation can be an operation to directly delete the options corresponding to irrelevant items.

[0070] Understandably, some items may be very large in the 3D design drawings, encompassing the room model that needs to be calculated. These items are not included in the establishment of the thermal analysis model and need to be manually removed.

[0071] For example, after obtaining the control body form, it is also possible to check whether there are any errors in the parameters of the control body in the control body form. If there are errors, the process returns to the step of obtaining the room model; if there are no errors, the process proceeds to the step of obtaining the circulation form and the heat absorption structure form based on the room location information and wall information. The content checked in this part may include whether irrelevant items have been removed, whether the room objects (i.e., the room model) have been added correctly, etc.

[0072] For example, after obtaining the heat-absorbing structure form, it is possible to check whether the parameters of the heat-absorbing structure are correct. If there are errors, the process returns to the step of obtaining the room model; if there are no errors, the subsequent steps of simplifying the heat-absorbing structure form are performed. The content checked in this part may include whether the added room (i.e., the room model) contains all the corresponding heat-absorbing structures.

[0073] For example, after obtaining the flow channel form, it is possible to check whether the various parameters of the flow channel are correct. If there are errors, the process returns to the step of obtaining the room model; if there are no errors, the subsequent step of determining the thermal analysis model input file based on the control body form, the flow channel form, and the simplified heat absorption structure form is executed. The content checked in this part may include whether the added room (i.e., the room model) contains all the flow channels that should be calculated.

[0074] In this embodiment, the aforementioned checks can be proactively performed by personnel to examine the information in the form. For example, whether there are negative parameters, or whether the control bodies in the form include all rooms that should be calculated. The specific checking process is a mature existing technology.

[0075] In step S130, for example, a thermal analysis model input file can be used to establish a thermal analysis model.

[0076] For example, thermal analysis models can be used to simulate, for instance, post-accident plant environmental conditions calculations, cryogenic protection calculations, and containment integrity analysis.

[0077] In some implementations, the thermal analysis model input file is determined based on the control volume form, flow channel form, and heat absorption structure form, including: The heat-absorbing structure form is simplified to obtain the simplified heat-absorbing structure form; the simplified heat-absorbing structure form includes the single-sided surface area of ​​the simplified heat-absorbing structure and the thickness of each heat-absorbing structure material. Based on the control body form, flow channel form, and simplified heat absorption structure form, determine the input file for the thermal analysis model.

[0078] For example, the control volume form, flow channel form, and simplified heat absorption structure form are compiled into a thermal analysis model input file.

[0079] In some examples, the heat-absorbing structure form is simplified to obtain a simplified heat-absorbing structure form, including: Obtain the structural characteristics of the heat-absorbing structure; Based on the structural characteristics, the heat absorption structure form is simplified to obtain the simplified heat absorption structure form.

[0080] For example, structural features may include simple or complex structures.

[0081] For example, the structural characteristics of the heat-absorbing structure can be determined based on a drawing stored in the electronic device, or the structural characteristics of the heat-absorbing structure can be pre-stored in the electronic device for direct use later.

[0082] In some examples, the heat-absorbing structure form is simplified based on structural characteristics, resulting in a simplified heat-absorbing structure form, including: When the structure is simple, the thickness of the heat-absorbing structure material is determined based on the thickness of the main material of the heat-absorbing structure, and the ratio of the total volume of the heat-absorbing structure to the thickness of the heat-absorbing structure material is determined as the single-sided surface area of ​​the simplified heat-absorbing structure; the thickness of the main material and the total volume of the heat-absorbing structure are determined according to the form of the heat-absorbing structure. In cases where the structure is complex, half of the total surface area corresponding to the heat-absorbing structure is determined as the single-sided surface area of ​​the simplified heat-absorbing structure, and the ratio of the total volume of the heat-absorbing structure to the single-sided surface area of ​​the simplified heat-absorbing structure is determined as the thickness of the heat-absorbing structure material; the total surface area corresponding to the heat-absorbing structure is determined according to the heat-absorbing structure form.

[0083] In this embodiment, the heat-absorbing structure form is further processed to obtain the form used for the thermal analysis model of the nuclear island plant. The simplification method is determined based on the characteristics of the item (i.e., the heat-absorbing structure) (according to the drawings). Typically, the item is simplified into a flat heat-absorbing structure with double-sided heat transfer. The single-sided surface area and the thickness of each material of the heat-absorbing structure are obtained based on the simplification method.

[0084] For example, the total volume of the heat-absorbing structure can be the sum of the volumes of heat-absorbing structures of the same type. For instance, for a ventilation duct, the total volume of the heat-absorbing structure of the ventilation duct is the sum of the volumes of the heat-absorbing structures of all ventilation ducts.

[0085] For example, the total surface area corresponding to the heat-absorbing structure is the sum of the heat-absorbing structure areas of the same type of heat-absorbing structure. For instance, for a ventilation duct, the total surface area of ​​the heat-absorbing structure of the ventilation duct is the sum of the heat-absorbing structure areas of all ventilation ducts.

[0086] Specifically, there are several simplification methods: The first is to artificially assign a simplified thickness to the main material based on the drawings. For example, for ventilation ducts, whose structure is relatively simple, mainly composed of steel plates of a certain thickness, the steel plate thickness is used as the thickness of the heat-absorbing structural material. The single-sided surface area (i.e., the simplified single-sided surface area of ​​the heat-absorbing structure) equals the total volume divided by the thickness. Additionally, some items have coatings on the surface of the main material, so the coating thickness also needs to be specified. The second method, which is more complex, uses half of the statistically obtained total surface area as the single-sided surface area. The thickness then equals the total volume divided by the single-sided surface area. For example, for some support structures, the total surface area and total volume are statistically obtained in the 3D design. It is assumed that the single-sided surface area (i.e., the simplified single-sided surface area of ​​the heat-absorbing structure) equals half of the total surface area. The thickness (i.e., the thickness of the heat-absorbing structural material) is then obtained through the volume and the single-sided surface area. Although half of the total surface area is slightly larger than the actual single-sided surface area, the thickness calculated using this method is slightly lower than the actual thickness, which meets the analysis requirements from a thermal conservatism perspective.

[0087] To better understand the thermal analysis model establishment method provided in the embodiments of this application, the following description is provided in conjunction with specific implementation methods.

[0088] The overall technical solution is as follows: Using 3D design drawings, object positioning and collision detection methods are employed to obtain the necessary data. The obtained data is then reasonably simplified according to its intended use to obtain data for the thermal calculation and analysis of the nuclear island plant, thereby forming the thermal analysis model of the nuclear island plant.

[0089] like Figure 2 As shown, the method for establishing a thermal analysis model provided in this application includes: Step 1: Select the room object and add the required room model to the analysis model; Step 2: Eliminate irrelevant items; Some items may be very large in the 3D design drawings, encompassing the room model that needs to be calculated. These items are not included in the establishment of the analysis model and need to be manually removed.

[0090] Step 3: Obtain the control volume form. Room information is obtained through object collision analysis to generate the control volume form. The control volume form includes the room's building volume, the volume of equipment intersecting with the room's volume, free volume, room floor elevation, room height, hydraulic diameter (i.e., the room's hydraulic diameter), and circulation area (i.e., the room's circulation area). Specifically, the control volume form is obtained by adding the self-developed "Containment Thermal-Hydraulic Evaluation Model Data Extraction Module" to AVEVA E3d.

[0091] The circulation area refers to the area of ​​the room along its height, and the hydraulic diameter is the hydraulic diameter corresponding to that circulation area. Free volume is obtained by subtracting the volume of equipment that intersects with the room's volume from the room's building volume. The hydraulic diameter can be calculated using the circulation area and perimeter.

[0092] Then check if there are any errors in the parameters of the control body (check if irrelevant items have been removed and if room objects have been added correctly). If there are any errors, return to step one; if there are no errors, proceed to steps four and five.

[0093] Step 4: Obtain the flow channel form. Obtain the flow channel information (i.e., the flow channel form) through room location information (the relative positions of the rooms, i.e., the room numbers on both sides of the flow channel) and wall information (wall thickness and the area, height, and perimeter of the flow channels (door openings, window openings, object openings) on the walls). Typical flow channels include door openings, window openings, object openings, etc. The flow channel form information (i.e., the flow channel form) includes the room number on side A (i.e., the first side room number), the bottom elevation of side A (i.e., the first side bottom elevation), the height of side A (i.e., the first side height), the room number on side B (i.e., the second side room number), the bottom elevation of side B (i.e., the second side bottom elevation), the height of side B (i.e., the second side height), the flow area (i.e., the flow channel flow area), the hydraulic diameter (i.e., the flow channel hydraulic diameter), the inertial length, and the penetration length. Side A and side B refer to the two sides of the flow channel; generally, side A refers to the side with the smaller room number. If the room on side B of the flow channel is a boundary or atmospheric environment, it can be represented by a special number, such as 9999. Specifically, the flow channel form is obtained by adding the self-developed "Containment Thermal-Hydraulic Evaluation Model Data Extraction Module" to AVEVA E3d.

[0094] The hydraulic diameter refers to the hydraulic diameter of the channel cross-section, the inertial length refers to the distance between the geometric centers of the two rooms, and the through length refers to the length of the channel itself. Two different treatment methods for typical channels are given. For horizontal channels, such as doorways, the heights of the rooms on both sides (A and B) are the same or not significantly different, and the bottom elevations of the channels on both sides are not significantly different. The channel elevation on sides A and B is based on the actual elevation, and the height is based on the actual doorway height. For vertical channels, such as holes located in the room floor, the rooms on both sides (A and B) are arranged vertically. The channel elevation on the side of the lower room is approximately equal to the top elevation of the room, equal to the top elevation minus a fixed value, and the channel height on that side is equal to that fixed value. The channel elevation on the side of the upper room is equal to the bottom elevation of the room, and the channel height is equal to the aforementioned fixed value.

[0095] Then check if there are any errors in the parameters of the flow channel (check if the added room contains all the flow channels that should be calculated). If there are any errors, return to step one; if there are no errors, proceed to step six.

[0096] Step 5: Obtain the heat-absorbing structure form. Using the location information of rooms and objects (i.e., the heat-absorbing structure form and wall information), obtain the information of the heat-absorbing structures within the room (i.e., the heat-absorbing structure form). Typical heat-absorbing structures include concrete walls, concrete floors, steel gratings, equipment supports, etc. Obtain the location information of the objects; the heat-absorbing structure form includes the room number on side A (i.e., the room number on the third side) and the room number on side B (i.e., the room number on the fourth side); the surface type of the object (i.e., the surface type of the heat-absorbing structure); the thickness or volume of the object (i.e., the thickness or volume of the heat-absorbing structure); the area of ​​the object (i.e., the area of ​​the heat-absorbing structure); and the material of the object (i.e., the material of the heat-absorbing structure). Specifically, the heat-absorbing structure form is obtained by adding the self-developed "Containment Thermal-Hydraulic Evaluation Model Data Extraction Module" to AVEVA E3d.

[0097] For items such as concrete walls, floors, and steel gratings, these heat-absorbing structures typically have different room numbers on both sides; generally, side A refers to the side with the smaller room number. The surface type of these items is usually vertical or horizontal. For items such as equipment supports, these heat-absorbing structures are usually located within a single room, so the room numbers on both sides (A and B) are the same. The surface type of these items is generally vertical. An item typically has only one characteristic: thickness or volume. Data obtained from the 3D platform prioritizes thickness; if the item does not contain this characteristic value, then volume is given. The area of ​​an item is generally its total surface area; the material of an item is generally concrete or metal.

[0098] Then check if there are any errors in the parameters of the heat absorption structure (check if the added room contains all the corresponding heat absorption structures). If there are any errors, return to step one; if there are no errors, proceed to step six.

[0099] Step 6: Simplification of the heat-absorbing structure form. Further processing of the heat-absorbing structure form (Step 5) yields the form used for the thermal analysis model of the nuclear island plant. Based on the characteristics of the item (according to the drawings), the simplification method is determined; typically, the item is simplified to a flat plate heat-absorbing structure with double-sided heat transfer. The single-sided surface area and the thickness of each material of the heat-absorbing structure are obtained based on the simplification method. The simplified heat-absorbing structure form includes the single-sided surface area of ​​the simplified heat-absorbing structure and the thickness of each heat-absorbing structure material. There are several simplification methods: The first is to artificially assign a simplified thickness to the main material based on the drawings. For example, for ventilation ducts, whose structure is relatively simple, mainly composed of steel plates of a certain thickness, the steel plate thickness is used as the thickness of the heat-absorbing component. The single-sided surface area equals the total volume divided by the thickness. Additionally, some items have coatings on the main material surface, so the coating thickness also needs to be specified. The second method, which is more complex, uses half of the statistically obtained total surface area as the single-sided surface area. The thickness then equals the total volume divided by the single-sided surface area. For example, for some support structures, the total surface area and total volume are statistically obtained in the 3D design. It is assumed that the single-sided surface area equals half of the total surface area, and the thickness is obtained through the volume and the single-sided surface area. Although half of the total surface area is slightly larger than the actual single-sided surface area, the thickness calculated using this method is slightly lower than the actual thickness, which meets the analysis requirements from a thermal conservatism perspective.

[0100] This application provides a method for rapidly establishing a thermal analysis model of a nuclear island plant (i.e., a method for establishing a thermal analysis model). Because it is based on standardized data and uses standardized processes to obtain the basic data for the thermal analysis model, it is more accurate and faster than previous experience-based modeling methods, which can improve the work efficiency of designers and improve the accuracy of calculation results.

[0101] The technical problems to be solved by the embodiments of this application include: 1) Obtain the accurate free volume of the room (building volume minus the volume of all items occupying the space); 2) Obtain parameters such as the room's floor elevation, height, flow area, and hydraulic diameter; 3) Obtain accurate values ​​for the volume and surface area of ​​the object; 4) Obtain the surface area and thickness of the heat-absorbing structure by measuring the volume and surface area of ​​the object; 5) Obtain the material type of the item; 6) Obtain parameters such as the flow area, bottom elevation, hydraulic diameter, and inertial length of the flow channels between rooms.

[0102] Based on the same inventive concept, this application also provides a containment integrity analysis method, which can be applied to nuclear island plants. This containment integrity analysis method may include steps S210 to S220.

[0103] S210. A thermal analysis model is established according to the thermal analysis model establishment method of the above embodiment.

[0104] S220. Conduct containment integrity analysis based on the thermal analysis model.

[0105] The containment integrity analysis method provided in this application includes the thermal analysis model establishment method of the above embodiments, that is, it has the beneficial effects and implementation methods of the thermal analysis model establishment method provided in this application. For details, please refer to the specific description of the thermal analysis model establishment method in the above embodiments, which will not be repeated here.

[0106] Based on the same inventive concept, this application also provides a device for establishing a thermal analysis model. This device can be applied to nuclear island plants. Figure 3 As shown, the device may include a first acquisition module 310, a first determination module 320, a second determination module 330, and a first establishment module 340.

[0107] The first acquisition module 310 is used to acquire the room model; The first determining module 320 is used to determine the control volume form, the flow channel form, and the heat absorption structure form based on the room model. The control volume form includes at least one of the following: room building volume, equipment volume intersecting with the room volume, free volume, room bottom elevation, room height, room hydraulic diameter, and room flow area. The flow channel form includes at least one of the following: first side room number, first side bottom elevation, first side height, second side room number, second side bottom elevation, second side height, flow channel area, flow channel hydraulic diameter, inertial length, and penetration length; the first side room number is less than or equal to the second side room number. The heat absorption structure form includes at least one of the following: third side room number, fourth side room number, heat absorption structure surface type, heat absorption structure thickness or volume, heat absorption structure area, and heat absorption structure material; the third side room number is less than or equal to the fourth side room number. The second determining module 330 is used to determine the thermal analysis model input file based on the control body form, the flow channel form, and the heat absorption structure form; The first module 340 is used to establish a thermal analysis model based on the thermal analysis model input file.

[0108] According to the thermal analysis model building apparatus provided in this application embodiment, a room model is first acquired; then, based on the room model, the control body form, flow channel form, and heat absorption structure form are determined; next, based on the control body form, flow channel form, and heat absorption structure form, the thermal analysis model input file is determined; and finally, based on the thermal analysis model input file, the thermal analysis model is built. In other words, in this application embodiment, the control body form, flow channel form, and heat absorption structure form are determined through the room model, i.e., based on standardized data and using a standardized process, the basic data used to build the thermal analysis model is determined. Compared to thermal analysis models based on experience in related technologies, this application embodiment can accurately and quickly build thermal analysis models, thereby improving the work efficiency of designers.

[0109] In some implementations, the first determining module 320 is specifically used for: Based on the room model, determine the basic room information, room location information, and wall information; Based on the basic room information, the control body form is obtained; Based on the room location information and wall information, the flow channel form and heat absorption structure form are obtained.

[0110] In some implementations, the first determining module 320 is specifically used for: Based on the room model, basic room information, room location information, and wall information are obtained through object collision.

[0111] In some embodiments, the device further includes: The elimination module is used to remove irrelevant items from the room model, resulting in a room model after elimination. The first determining module 320 is specifically used for: Based on the culled room model, basic room information, room location information, and wall information are obtained through object collision detection.

[0112] In some implementations, the second determining module 330 is specifically used for: The heat-absorbing structure form is simplified to obtain the simplified heat-absorbing structure form; the simplified heat-absorbing structure form includes the single-sided surface area of ​​the simplified heat-absorbing structure and the thickness of each heat-absorbing structure material. Based on the control body form, flow channel form, and simplified heat absorption structure form, determine the input file for the thermal analysis model.

[0113] In some implementations, the second determining module 330 is specifically used for: Obtain the structural characteristics of the heat-absorbing structure; Based on the structural characteristics, the heat absorption structure form is simplified to obtain the simplified heat absorption structure form.

[0114] In some implementations, the second determining module 330 is specifically used for: When the structure is simple, the thickness of the heat-absorbing structure material is determined based on the thickness of the main material of the heat-absorbing structure, and the ratio of the total volume of the heat-absorbing structure to the thickness of the heat-absorbing structure material is determined as the single-sided surface area of ​​the simplified heat-absorbing structure; the thickness of the main material and the total volume of the heat-absorbing structure are determined according to the form of the heat-absorbing structure. In cases where the structure is complex, half of the total surface area corresponding to the heat-absorbing structure is determined as the single-sided surface area of ​​the simplified heat-absorbing structure, and the ratio of the total volume of the heat-absorbing structure to the single-sided surface area of ​​the simplified heat-absorbing structure is determined as the thickness of the heat-absorbing structure material; the total surface area corresponding to the heat-absorbing structure is determined according to the heat-absorbing structure form.

[0115] The thermal analysis model establishment apparatus provided in this application embodiment can be used to execute the thermal analysis model establishment method, that is, it has the beneficial effects and implementation methods of the thermal analysis model establishment method provided in this application embodiment. For details, please refer to the specific description of the thermal analysis model establishment method in the above embodiment, which will not be repeated here.

[0116] Based on the same inventive concept, this application also provides a containment integrity analysis system, which can be applied to nuclear island plants. The system includes: The thermal analysis model establishment apparatus of the above embodiment is used to establish a thermal analysis model.

[0117] The analytical apparatus is used to perform containment integrity analysis based on a thermal analysis model.

[0118] The containment integrity analysis system provided in this application embodiment can be used to execute the containment integrity analysis method, that is, it has the beneficial effects and implementation methods of the containment integrity analysis method provided in this application embodiment. For details, please refer to the specific description of the containment integrity analysis method in the above embodiment, which will not be repeated here.

[0119] It is understood that the various method embodiments mentioned above in this application can be combined with each other to form combined embodiments without violating the principle and logic. Due to space limitations, this application will not elaborate further. Those skilled in the art will understand that in the above methods of specific implementation, the specific execution order of each step should be determined by its function and possible internal logic.

[0120] Figure 4 This is a block diagram of an electronic device provided in an embodiment of this application.

[0121] Reference Figure 4This application provides an electronic device, which includes: at least one processor 701; at least one memory 702; and one or more I / O interfaces 703 connected between the processor 701 and the memory 702; wherein the memory 702 stores one or more computer programs that can be executed by at least one processor 701, and the one or more computer programs are executed by at least one processor 701 to enable at least one processor 701 to perform the above-described thermal analysis model establishment method or containment integrity analysis method.

[0122] This application also provides a computer-readable storage medium storing a computer program thereon, wherein the computer program, when executed by a processor / processor core, implements the above-described thermal analysis model establishment method or containment integrity analysis method. The computer-readable storage medium can be volatile or non-volatile.

[0123] This application also provides a computer program product, including computer-readable code, or a non-volatile computer-readable storage medium carrying computer-readable code. When the computer-readable code is run in the processor of an electronic device, the processor in the electronic device executes the above-described thermal analysis model establishment method or containment integrity analysis method.

[0124] Those skilled in the art will understand that all or some of the steps, systems, and apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software can be distributed on a computer-readable storage medium, which may include computer storage media (or non-transitory media) and communication media (or transient media).

[0125] As is known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable program instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), static random access memory (SRAM), flash memory or other memory technologies, portable compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, it is known to those skilled in the art that communication media typically contain computer-readable program instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0126] The computer-readable program instructions described herein can be downloaded from computer-readable storage media to various computing / processing devices, or downloaded via a network, such as the Internet, local area network, wide area network, and / or wireless network, to an external computer or external storage device. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards them to the computer-readable storage media in the respective computing / processing device.

[0127] The computer program instructions used to perform the operations of this application may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The computer-readable program instructions may be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuits, such as programmable logic circuits, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), are personalized by utilizing the status information of the computer-readable program instructions. These electronic circuits can execute the computer-readable program instructions to implement various aspects of this application.

[0128] The computer program product described herein can be implemented specifically through hardware, software, or a combination thereof. In one alternative embodiment, the computer program product is specifically embodied in a computer storage medium; in another alternative embodiment, the computer program product is specifically embodied in a software product, such as a software development kit (SDK), etc.

[0129] Various aspects of this application are described herein with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-readable program instructions.

[0130] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that, when executed by the processor of the computer or other programmable data processing apparatus, they create means for implementing the functions / actions specified in one or more blocks of the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium that causes a computer, programmable data processing apparatus, and / or other device to operate in a particular manner; thus, the computer-readable medium storing the instructions comprises an article of manufacture that includes instructions for implementing aspects of the functions / actions specified in one or more blocks of the flowchart and / or block diagram.

[0131] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to perform the functions / actions specified in one or more boxes of a flowchart and / or block diagram.

[0132] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of an instruction containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0133] Example embodiments have been disclosed herein, and while specific terminology has been used, it is for general illustrative purposes only and should not be construed as limiting. In some instances, it will be apparent to those skilled in the art that features, characteristics, and / or elements described in conjunction with particular embodiments may be used alone, or in combination with features, characteristics, and / or elements described in conjunction with other embodiments, unless otherwise expressly indicated. Therefore, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of this application as set forth by the appended claims.

Claims

1. A method for establishing a thermal analysis model, characterized in that, Applied to nuclear island plant buildings, the method includes: Obtain the room model; Based on the room model, determine the control volume form, flow channel form, and heat absorption structure form; the control volume form includes at least one of the following: room building volume, equipment volume intersecting with the room volume, free volume, room bottom elevation, room height, room hydraulic diameter, and room flow area; the flow channel form includes at least one of the following: first side room number, first side bottom elevation, first side height, second side room number, second side bottom elevation, second side height, flow channel area, flow channel hydraulic diameter, inertial length, and penetration length; the first side room number is less than or equal to the second side room number; the heat absorption structure form includes at least one of the following: third side room number, fourth side room number, heat absorption structure surface type, heat absorption structure thickness or volume, heat absorption structure area, and heat absorption structure material; the third side room number is less than or equal to the fourth side room number; The thermal analysis model input file is determined based on the control body form, the flow channel form, and the heat absorption structure form. A thermal analysis model is established based on the input file of the thermal analysis model.

2. The method according to claim 1, characterized in that, The step of determining the control body form, flow channel form, and heat absorption structure form based on the room model includes: Based on the room model, determine the basic room information, room location information, and wall information; Based on the basic room information, the control body form is obtained; Based on the room location information and the wall information, the flow channel form and the heat absorption structure form are obtained.

3. The method according to claim 2, characterized in that, The determination of basic room information, room location information, and wall information based on the room model includes: Based on the room model, the basic information of the room, the location information of the room, and the wall information are obtained through object collision.

4. The method according to claim 3, characterized in that, Before obtaining the basic room information, the room location information, and the wall information based on the room model through object collision, the method further includes: Remove irrelevant items from the room model to obtain the room model after removal; The process of obtaining basic room information, room location information, and wall information based on the room model through object collision includes: Based on the eliminated room model, the basic information of the room, the location information of the room, and the wall information are obtained through object collision.

5. The method according to claim 1, characterized in that, The step of determining the thermal analysis model input file based on the control body form, the flow channel form, and the heat absorption structure form includes: The heat-absorbing structure form is simplified to obtain a simplified heat-absorbing structure form; the simplified heat-absorbing structure form includes the single-sided surface area of ​​the simplified heat-absorbing structure and the thickness of each heat-absorbing structure material; Based on the control body form, the flow channel form, and the simplified heat absorption structure form, determine the thermal analysis model input file.

6. The method according to claim 5, characterized in that, The process of simplifying the heat-absorbing structure form to obtain a simplified heat-absorbing structure form includes: Obtain the structural characteristics of the heat-absorbing structure; Based on the structural characteristics, the heat-absorbing structure form is simplified to obtain the simplified heat-absorbing structure form.

7. The method according to claim 6, characterized in that, The heat-absorbing structure form is simplified based on the structural characteristics to obtain a simplified heat-absorbing structure form, including: When the structure is simple, the thickness of the heat-absorbing structure material is determined based on the thickness of the main material of the heat-absorbing structure, and the ratio of the total volume of the heat-absorbing structure to the thickness of the heat-absorbing structure material is determined as the single-sided surface area of ​​the simplified heat-absorbing structure; the thickness of the main material and the total volume of the heat-absorbing structure are determined according to the form of the heat-absorbing structure. When the structure is complex, half of the total surface area of ​​the heat-absorbing structure is determined as the single-sided surface area of ​​the simplified heat-absorbing structure, and the ratio of the total volume of the heat-absorbing structure to the single-sided surface area of ​​the simplified heat-absorbing structure is determined as the thickness of the heat-absorbing structure material; the total surface area of ​​the heat-absorbing structure is determined according to the heat-absorbing structure form.

8. A method for analyzing containment integrity, characterized in that, Applied to nuclear island plant buildings, the method includes: A thermal analysis model is established according to any one of claims 1 to 7; Based on the aforementioned thermal analysis model, a containment integrity analysis is performed.

9. A device for establishing a thermal analysis model, characterized in that, The device, used in nuclear island plant facilities, includes: The first acquisition module is used to acquire the room model; The first determining module is used to determine the control volume form, the flow channel form, and the heat absorption structure form based on the room model. The control volume form includes at least one of the following: room building volume, equipment volume intersecting with the room volume, free volume, room floor elevation, room height, room hydraulic diameter, and room flow area. The flow channel form includes at least one of the following: first side room number, first side floor elevation, first side height, second side room number, second side floor elevation, second side height, flow channel area, flow channel hydraulic diameter, inertial length, and penetration length; the first side room number is less than or equal to the second side room number. The heat absorption structure form includes at least one of the following: third side room number, fourth side room number, heat absorption structure surface type, heat absorption structure thickness or volume, heat absorption structure area, and heat absorption structure material; the third side room number is less than or equal to the fourth side room number. The second determining module is used to determine the thermal analysis model input file based on the control body form, the flow channel form, and the heat absorption structure form; The first module is used to establish a thermal analysis model based on the thermal analysis model input file.

10. A containment integrity analysis system, characterized in that, The system, applied in nuclear island plant buildings, includes: The thermal analysis model establishing apparatus according to claim 9 is used to establish a thermal analysis model; An analytical apparatus is used to perform containment integrity analysis based on the aforementioned thermal analysis model.

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