Internal flooding protection design method and device, electronic equipment and storage medium

Abstract

The invention discloses an internal water flooding protection design method and device, electronic equipment and a storage medium, and the method and device are applied to the electronic equipment, in particular to identification of flooding forbidding equipment for executing a safety function in a high-temperature gas cooled reactor. Dividing flooding partitions with internal flooding based on the flooding prohibiting equipment; determining a water flooding source of the water flooding partition; calculating a spreading path in the water-flooded partition according to the water-flooded source; calculating the flooding height of the flooding partition according to the spreading path; and determining the flooding influence degree according to the flooding height and the parameters of the flooding forbidding equipment. According to the technical scheme provided by the invention, internal flooding protection design is implemented based on the characteristics of the high-temperature gas cooled reactor, and proper improvement measures are put forward by analyzing and judging the influence of internal flooding on safety important equipment of the nuclear power plant, so that a nuclear safety related system or equipment is prevented from being adversely influenced by internal flooding, and the safety of the nuclear power plant is improved. Therefore, the safety of the high-temperature gas cooled reactor is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of nuclear reactors, and more specifically, to an internal flooding protection design method, device, electronic equipment and storage medium. Background Art

[0002] The high temperature gas-cooled reactor belongs to the fourth generation of nuclear power reactors, which has the advantages of good inherent safety, high power generation efficiency and wide application. The high temperature gas-cooled reactor generates electricity through the conversion of nuclear energy-thermal energy-mechanical energy-electrical energy, which can replace traditional fossil energy and achieve coordinated development of economy and ecological environment. Technically, the high temperature gas-cooled reactor eliminates the need for off-site emergency response and has the ability to replace the old units of small and medium-sized thermal power plants that have been shut down and retired.

[0003] According to the requirements of the Safety Regulations for the Design of Nuclear Power Plants (HAF 102-2016), the design must properly consider internal hazards including flooding and fluid release from damaged systems or other facilities on site, and appropriate prevention and mitigation measures must be provided to ensure that safety is not compromised. The Protection Design for Internal Hazards (Except Fire and Explosion) in Nuclear Power Plants (HDA102 / 04-2019) also stipulates that when high-energy missiles may hit pipes, tanks or pools that are usually filled with liquid, the potential for damage caused by flooding should be evaluated. However, the current internal flooding protection design is mainly used for pressurized water reactors.

[0004] There are many major differences between the design of high-temperature gas-cooled reactors and pressurized water reactors. High-temperature gas-cooled reactors are built with modular design, and multiple modules are arranged in the same plant. There are multiple modules that share systems and multiple modules that perform the same function. Systems and equipment are arranged in the same area. When internal flooding occurs, one type of flooding may cause internal flooding in multiple modules. Therefore, the existing design method cannot meet the safety requirements of high-temperature gas-cooled reactors. Summary of the invention

[0005] In view of this, the present application provides an internal flooding protection design method, device, electronic device and storage medium for waterproofing the internal flooding of a high temperature gas-cooled reactor to meet the safety requirements of the high temperature gas-cooled reactor.

[0006] In order to achieve the above objectives, the proposed solution is as follows:

[0007] An internal flooding protection design method is applied to electronic equipment, and the internal flooding protection design method comprises the following steps:

[0008] Identify flood-proof equipment that performs safety functions in high-temperature gas-cooled reactors;

[0009] Dividing internal flooding into flood zones based on the flood-proof device;

[0010] Determining a source of flooding in the flooded zone;

[0011] Analyze the spreading path of the flooded area according to the flooded source;

[0012] Calculate the flooding height of the flooded zone according to the spreading path;

[0013] The degree of flooding impact is determined according to the flooding height and the parameters of the flooding prevention device.

[0014] Optionally, the step of identifying flood-proof equipment that performs a safety function in a high-temperature gas-cooled reactor comprises the following steps:

[0015] Identifying key systems of the high temperature gas-cooled reactor;

[0016] determining a plurality of key devices from the key systems;

[0017] Part or all of the key equipment are determined to be the flood-prohibited equipment from among the multiple key equipment.

[0018] Optionally, the flood-proof equipment also includes equipment whose risk contribution or importance meets preset conditions in probabilistic safety analysis, and equipment that may be affected by the same flooding accident and cause multi-module initiating events.

[0019] Optionally, the flooding sources include leakage / damage points of pipelines, damage points / overflow points of water tanks, equipment isolation failure points, water outlet points of fire-fighting equipment, and water outlet points extending from adjacent areas to the current area.

[0020] Optionally, calculating the flooding height of the flooded zone according to the spreading path comprises the steps of:

[0021] Select the flood source with the largest flow and water volume as the zone inflow;

[0022] Determine the outflow of the subarea according to the drainage measures of the flooded subarea and the spreading path;

[0023] The flooding height is obtained by calculating according to the subarea inflow, the subarea outflow and the flooded area of ​​the flooded subarea.

[0024] Optionally, the following steps are also included:

[0025] Output protection design improvement information according to the flooding impact level.

[0026] Optionally, the protection design improvement information includes part or all of the pipeline layout improvement information of the flooding source, the installation height improvement information of the flooding prevention equipment, the waterproof level improvement information of the flooding prevention equipment, the flooding spread risk limiting device improvement information and the drainage facility improvement information.

[0027] An internal flooding protection design device is applied to electronic equipment, and the internal flooding protection design device comprises:

[0028] An equipment identification module is configured to identify flood-prohibited equipment that performs safety functions in a high-temperature gas-cooled reactor;

[0029] A zone division module is configured to divide the internal flooding into flood zones based on the flood-proof device;

[0030] A flooding source determination module, configured to determine a flooding source of the flooded zone;

[0031] A first calculation module is configured to calculate a spreading path within the flooded zone according to the flooded source;

[0032] A second calculation module is configured to calculate the flooding height of the flooded zone according to the spreading path;

[0033] The flooding determination module is configured to determine the flooding impact degree according to the flooding height and the parameters of the flooding prohibition device.

[0034] Optionally, also include:

[0035] The improvement output module is configured to output protection design improvement information according to the flood impact degree.

[0036] An electronic device comprises at least one processor and a memory connected to the processor, wherein:

[0037] The memory is used to store computer programs or instructions;

[0038] The processor is used to execute the computer program or instruction so that the electronic device can implement the internal flooding protection design method as described above.

[0039] A storage medium is applied to an electronic device, wherein the storage medium carries one or more computer programs, and the one or more computer programs can be executed by the electronic device to enable the electronic device to implement the internal flooding protection design method as described above.

[0040] It can be seen from the above technical scheme that the present application discloses an internal flooding protection design method, device, electronic device and storage medium. The method and device are applied to electronic devices, specifically to identify prohibited flooding equipment that performs safety functions in high-temperature gas-cooled reactors; divide the internal flooding into flooding zones based on the prohibited flooding equipment; determine the flooding sources of the flooding zones; calculate the spreading paths within the flooding zones according to the flooding sources; calculate the flooding heights of the flooding zones according to the spreading paths; and determine the degree of flooding impact according to the flooding heights and the parameters of prohibited flooding equipment. The technical scheme provided by the present application implements the internal flooding protection design based on the characteristics of the high-temperature gas-cooled reactor itself, and proposes appropriate improvement measures by analyzing and judging the impact of internal flooding on important safety equipment in nuclear power plants, so as to avoid the adverse effects of internal flooding on nuclear safety-related systems or equipment, thereby ensuring the safety of the high-temperature gas-cooled reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A flow chart of an internal flooding protection design method according to an embodiment of the present application;

[0043] Figure 2 A flow chart of another internal flooding protection design method according to an embodiment of the present application;

[0044] Figure 3 A block diagram of an internal flooding protection design device according to an embodiment of the present application;

[0045] Figure 4 A block diagram of another internal flood protection design device according to an embodiment of the present application;

[0046] Figure 5 A block diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] High temperature gas-cooled reactors are generally arranged in multiple modules in the same plant, so there are multiple module shared systems, such as two-repile shared systems, six-repile shared systems, and multiple modules performing the same function are arranged in the same area. When internal flooding occurs, multiple module shared systems may fail due to one type of internal flooding, or multiple modules performing the same function may fail at the same time, resulting in the impact of internal flooding on multiple modules.

[0049] This application provides a design scheme for internal flooding protection of high-temperature gas-cooled reactors. For equipment in a multi-module common system and equipment that performs the same function in multiple modules, they are divided into different flooding zones through physical isolation as much as possible. If they are inevitably arranged in the same flooding zone, measures such as increasing the equipment waterproof level, floor drains, and equipment foundation height are taken to avoid the impact of multiple modules caused by internal flooding. The specific scheme is described as follows.

[0050] Figure 1 This is a flow chart of an internal flooding protection design method according to an embodiment of the present application.

[0051] like Figure 1 As shown, the internal flooding protection design method provided in this embodiment is applied to electronic equipment, and is used to design the internal flooding protection of a high temperature gas-cooled reactor. The electronic equipment can be understood as a computer, server or cloud platform with information processing capability and data computing capability. The internal flooding protection design method includes the following steps:

[0052] S1. Identify flood-proof equipment that performs safety functions in high-temperature gas-cooled reactors.

[0053] Equipment that performs safety functions in high-temperature gas-cooled reactors and the equipment contained in the supporting systems they require are collectively referred to as key equipment, including process, electrical, instrumentation, control, ventilation and other systems. Among them, equipment that is susceptible to failure due to flooding and affects system functions after failure is called flood-proof equipment. The identification of flood-proof equipment is to determine the important nuclear safety items for internal flooding protection to avoid the impact of internal flooding on the safety functions it performs. The identification of flood-proof equipment is achieved through the following means.

[0054] First, the safety function and system configuration are analyzed. That is, according to the safety function, the system configuration of the safety function is analyzed, and the system that performs the safety function is identified as the key system.

[0055] Then, the safety functions that the critical system needs to perform are decomposed into devices, and it is identified whether the failure of the equipment will cause the degradation or loss of the main functions of the system. If so, the equipment is identified as a critical equipment.

[0056] Finally, determine whether the key equipment is flood-proof equipment one by one. The flood-proof equipment mainly includes the electric equipment, instrumentation and control cabinets, electrical cabinets, etc. of each system, while other passive equipment such as manual valves and heat exchangers will not fail due to flooding, so they are not flood-proof equipment.

[0057] In addition to the above safety-related equipment, the following equipment should be identified as flood-prohibited equipment in combination with the risk-guided analysis method and multi-module design features. Specifically, it includes equipment with high risk contribution or high importance in the probabilistic safety analysis results, and equipment in multi-module shared systems or systems or equipment with multiple modules performing the same function that will be affected by the same flooding and cause multi-module initiating events. In addition, the flood failure height of flood-prohibited equipment is determined based on the equipment installation height.

[0058] S2. Divide the internal flooding into flood zones based on flood-prohibited equipment.

[0059] The purpose of flooding zoning is to limit the spread of fluid between zones. Therefore, the area where the flood-prohibited equipment is located is divided into flooding zones. The division of flooding zones should meet the following requirements:

[0060] 1. The rooms where systems and equipment that perform safety functions are located should be divided into flooded zones;

[0061] 2. Specific measures for the division of flood zones should be achieved through physical boundary barriers as much as possible. The exterior walls, foundations and floor slabs of all structures must provide physical boundaries for flood zones;

[0062] 3. The boundary barriers and related components of the flooded zone include walls, doors, floors, caulking, ventilation ducts, plugging of mechanical and electrical penetrations, etc. These components should be water-resistant and should be able to withstand at least the load caused by the maximum flooding level of the zone when internal flooding occurs;

[0063] However, if the above requirements cannot be met due to objective conditions, it should be ensured that there will be no threat to the three basic safety functions of the nuclear power plant.

[0064] S3. Determine the source of flooding in the flooded area.

[0065] The design of the HTGR should consider internal flooding caused by hypothetical pipeline damage, water tank rupture, fire protection system activation, etc. Based on the above assumptions, the flooding sources and analysis include the following situations:

[0066] 1. Leakage or rupture points of high-energy pipelines and medium-energy pipelines;

[0067] 2. Damage points or overflow points of non-seismic Class I water tanks;

[0068] 3. Equipment isolation failure point;

[0069] 4. Water outlet points caused by the action (including malfunction) of the fire protection system, such as the operation of the fire sprinkler system after a fire occurs;

[0070] 5. Flooding caused by water spreading from adjacent buildings or modules.

[0071] In addition to considering the above-mentioned internal flooding sources within the factory building, flooding caused by damage to water storage structures or equipment within the factory area outside the factory building should also be included.

[0072] Among them, for high-energy and medium-energy pipeline breaches, the released flow calculation formula is:

[0073] W=C D AG C

[0074] Where: W is the mass flow rate, C D is the discharge coefficient, A is the breach area, G C is the critical mass flow rate per unit area.

[0075] According to NB / T 20379-2016 "Design Criteria for Time Response of Operator Actions Related to Safety in Nuclear Power Plants", all safety-related operator actions and other operator actions that should be performed within 30 minutes (including 30 minutes) after the event indication time should be completed in the main control room. Therefore, except for special system designs, the leakage time is unified as 30 minutes.

[0076] According to the layout of each flood source, all potential flood sources in each flood zone are determined, and according to the flow of each flood source, the flood source with the largest flow in the flood zone is selected as the flood source for analysis.

[0077] S4. Calculate the spreading path within the flooded area based on the flood source.

[0078] Analyze all mitigation measures and possible spread paths in the flood zone to provide input for the calculation of flood water level. Flood mitigation facilities include drainage systems and measures to limit spread.

[0079] Among them, the ground drainage facilities in the flooded area should be considered to be blocked; stairwells, ground openings, ground casings, door openings, etc. are calculated according to the actual leakage flow; except for some special functions (such as pressure relief and explosion relief), the openings in the floor and walls have been blocked according to the hole blocking documents before the operation of the nuclear power plant. The calculation of the spread flow mainly refers to NB / T20591-2021, and the following considerations are taken into account:

[0080] 1. For watertight doors, unless they are proven to be able to withstand the load of the maximum flooding level in the flooded zone, they are generally not considered as spreading paths;

[0081] 2. For floor drains, considering the possibility of blockage, half of the designed flow rate of the floor drain is generally taken as the drainage flow rate;

[0082] 3. Stairwells and ground openings. The formula can be used:

[0083]

[0084] Where:

[0085] Q—flow rate, in m 3 / s;

[0086] b—free perimeter of the opening, in m;

[0087] g—gravitational acceleration, value is 9.8m 3 / s;

[0088] h—Flooding level upstream of the opening, in meters.

[0089] 4. Ground casing. The formula used is as follows:

[0090]

[0091] Where:

[0092] A—flow area, in m 2 ;

[0093] C—emission coefficient, generally taken as 0.6;

[0094] h—water level at the top of the casing, in m.

[0095] 5. Flow through the door opening. Use the following formula:

[0096]

[0097] Where:

[0098] b—the width of the door opening, in meters;

[0099] h—flood level, in m;

[0100] h0—height of the door below, in m;

[0101] h b —Water level in adjacent compartments (back pressure height), in m;

[0102] C e —Concentration coefficient: This value ranges from 0.57 to 1 and should be as conservative as possible.

[0103] 6. Gradient flow. Use the following formula:

[0104]

[0105] Where:

[0106] P—the wetted perimeter of the channel, in m;

[0107] h—flood level, in m;

[0108] x—flow length along the process, in m;

[0109] n—Manni roughness, unit is m 1 / 6 ;

[0110] V—average velocity on the cross section, in m / s;

[0111] A—Cross-sectional area of ​​the channel, in m 2 ;

[0112] C—constant, unit is m / s 2 .

[0113] S5. Calculate the flood height of the flooded area according to the spreading path.

[0114] The calculation formula for flooding height is as follows:

[0115]

[0116] Among them, the zone inflow is the leakage water volume of the potential flooding source in the zone, and the zone outflow is the drainage volume of the zone through drainage measures and diffusion paths.

[0117] According to the calculation formula, the calculation process of flooding height is as follows:

[0118] 1. According to the flood sources in the sub-area, analyze the most dangerous flood sources in the sub-area, and select the water source with the largest flow and water volume as the sub-area inflow. The sub-area inflow calculation formula is as follows:

[0119] Partition inflow = leakage flow × leakage time

[0120] The following aspects should be considered in determining the inflow volume of each zone:

[0121] 1. For the open water source system, compare the leakage flow rate during the leakage time with the design flow rate of the water source system, and take the smaller value of the partition inflow. In particular, if the leakage flow rate is greater than the design flow rate of the water source system, the water storage capacity in the water source system network should be considered;

[0122] 2. For the closed-loop water source system, calculate the total water volume and replenishment volume of the water source system, compare the leakage water volume during the leakage time with the total water volume in the water source system, take the smaller value of the partition inflow, and recalculate the leakage time based on the partition inflow;

[0123] 3. In case of water tank damage, the instantaneous release of the fluid in the water tank should be considered. The total amount of released fluid should be equal to the internal volume of the water tank. The subsequent leakage flow should take into account the impact of automatic water replenishment and auxiliary pipelines.

[0124] 2. Determine the outflow volume of the sub-area based on the drainage measures and spreading paths within the flooded sub-area. The outflow volume calculation formula is as follows:

[0125] Outflow from each zone = drainage volume of drainage measures + spreading water volume

[0126] Among them, the outflow volume of the partition should consider the following two aspects:

[0127] 1. The unavailability of drainage measures is taken into account when calculating the drainage volume of drainage measures. Drainage measures mainly include floor drains, drainage ditches, pits and drainage pumps;

[0128] 2. When calculating the spread water volume, the water volume discharged from the flooded areas including door gaps, thresholds, stairwells and ground openings, ground casings, door openings, gradient flows, etc. shall be calculated in accordance with NB / T 20591-2021.

[0129] 3. Determine the flooded area of ​​the zone based on the layout of all equipment in the flooded zone and in combination with a 3D model (such as Navisworks, smart3D, etc.);

[0130] 4. Use the flood height calculation formula to calculate the flood height within the zone.

[0131] S6. Determine the degree of flooding impact based on the flooding height and the parameters of flood-proof equipment.

[0132] Compare the equipment installation height and the flooding water level, determine the spraying impact on the flood-forbidden equipment, and analyze whether the flood-forbidden equipment is affected by internal flooding. In this way, the impact of internal flooding on the high-temperature gas-cooled reactor, that is, the flooding impact, can be obtained, so that designers can carry out flood-proof design or modify the original design according to the flooding impact, or improve the project after the project is completed, so as to make the operation of the high-temperature gas-cooled reactor safer.

[0133] It can be seen from the above technical scheme that this embodiment provides an internal flooding protection design method, which is applied to electronic equipment, specifically to identify prohibited flooding equipment that performs safety functions in high-temperature gas-cooled reactors; divide the internal flooding into flooding zones based on the prohibited flooding equipment; determine the flooding sources of the flooding zones; calculate the spreading paths within the flooding zones according to the flooding sources; calculate the flooding heights of the flooding zones according to the spreading paths; and determine the degree of flooding impact according to the flooding heights and the parameters of prohibited flooding equipment. The technical scheme provided by this application implements the internal flooding protection design based on the characteristics of the high-temperature gas-cooled reactor itself, analyzes and determines the impact of internal flooding on important safety equipment in nuclear power plants, and proposes appropriate improvement measures to avoid the adverse effects of internal flooding on nuclear safety-related systems or equipment, thereby ensuring the safety of the high-temperature gas-cooled reactor.

[0134] In addition, in a specific implementation of the present application, the following steps are also included: Figure 2 shown.

[0135] S7. Output protection design improvement information based on the degree of flooding impact.

[0136] That is, if it is determined that the flood-proof equipment is affected by internal flooding, improvement suggestions are given. The improvement suggestions can refer to the following measures:

[0137] 1. Optimize the pipeline layout of the flood source system;

[0138] 2. Increase the installation height of flood prevention equipment;

[0139] 3. Improve the waterproof level of flood-proof equipment;

[0140] 4. Add thresholds, weirs and other measures to limit the risk of flooding;

[0141] 5. Add drainage facilities such as drainage ditches and collection pits.

[0142] By providing the above-mentioned improvement information, it is convenient for designers to improve the design scheme according to the improvement information, and there is a ready-made basis in the process of improving the scheme.

[0143] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0144] Although operations are depicted in a particular order, this should not be understood as requiring that the operations be performed in the particular order shown or in a sequential order.Multitasking and parallel processing may be advantageous under certain circumstances.

[0145] It should be understood that the various steps described in the method embodiments of the present disclosure may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present disclosure is not limited in this respect.

[0146] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages ​​or a combination thereof, including, but not limited to, object-oriented programming languages, such as Java, Smal |ltal k, C++, and conventional procedural programming languages, such as C or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer, partially on a remote computer, or entirely on a remote computer or server. In the case of 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.

[0147] Figure 3 A block diagram of an internal flooding protection design device according to an embodiment of the present application.

[0148] like Figure 3As shown, the internal flooding protection design device provided in this embodiment is applied to an electronic device for designing the internal flooding protection of a high temperature gas-cooled reactor. The electronic device can be understood as a computer, a server or a cloud platform with information processing capability and data computing capability. The internal flooding protection design device includes an equipment identification module 10, a partition division module 20, a flooding source identification module 30, a first calculation module 40, a second calculation module 50 and a flooding determination module 60.

[0149] The equipment identification module is used to identify the flood-proof equipment that performs safety functions in the high-temperature gas-cooled reactor.

[0150] Equipment that performs safety functions in high-temperature gas-cooled reactors and the equipment contained in the supporting systems they require are collectively referred to as key equipment, including process, electrical, instrumentation, control, ventilation and other systems. Among them, equipment that is susceptible to failure due to flooding and affects system functions after failure is called flood-proof equipment. The identification of flood-proof equipment is to determine the important nuclear safety items for internal flooding protection to avoid the impact of internal flooding on the safety functions it performs. The identification of flood-proof equipment is achieved through the following means.

[0151] First, the safety function and system configuration are analyzed. That is, according to the safety function, the system configuration of the safety function is analyzed, and the system that performs the safety function is identified as the key system.

[0152] Then, the safety functions that the critical system needs to perform are decomposed into devices, and it is identified whether the failure of the equipment will cause the degradation or loss of the main functions of the system. If so, the equipment is identified as a critical equipment.

[0153] Finally, determine whether the key equipment is flood-proof equipment one by one. The flood-proof equipment mainly includes the electric equipment, instrumentation and control cabinets, electrical cabinets, etc. of each system, while other passive equipment such as manual valves and heat exchangers will not fail due to flooding, so they are not flood-proof equipment.

[0154] In addition to the above safety-related equipment, the following equipment should be identified as flood-prohibited equipment in combination with the risk-guided analysis method and multi-module design features. Specifically, it includes equipment with high risk contribution or high importance in the probabilistic safety analysis results, and equipment in multi-module shared systems or systems or equipment with multiple modules performing the same function that will be affected by the same flooding and cause multi-module initiating events. In addition, the flood failure height of flood-prohibited equipment is determined based on the equipment installation height.

[0155] The zoning module is used to divide the internal flooding into flooding zones based on the flood-prohibited devices.

[0156] The purpose of flooding zoning is to limit the spread of fluid between zones. Therefore, the area where the flood-prohibited equipment is located is divided into flooding zones. The division of flooding zones should meet the following requirements:

[0157] 1. The rooms where systems and equipment that perform safety functions are located should be divided into flooded zones;

[0158] 2. Specific measures for the division of flood zones should be achieved through physical boundary barriers as much as possible. The exterior walls, foundations and floor slabs of all structures must provide physical boundaries for flood zones;

[0159] 3. The boundary barriers and related components of the flooded area include walls, doors, floors, caulking, ventilation ducts, mechanical and electrical penetration plugging, etc. These components should be water-resistant and should be able to withstand at least the load caused by the maximum flooding level of internal flooding in the subarea;

[0160] However, if the above requirements cannot be met due to objective conditions, it should be ensured that there will be no threat to the three basic safety functions of the nuclear power plant.

[0161] The flooding source determination module is used to determine the flooding source of the flooded zone.

[0162] The design of the HTGR should consider internal flooding caused by hypothetical pipeline damage, water tank rupture, fire protection system activation, etc. Based on the above assumptions, the flooding sources and analysis include the following situations:

[0163] 1. Leakage or rupture points of high-energy pipelines and medium-energy pipelines;

[0164] 2. Damage points or overflow points of non-seismic Class I water tanks;

[0165] 3. Equipment isolation failure point;

[0166] 4. Water outlet points caused by the action (including malfunction) of the fire protection system, such as the operation of the fire sprinkler system after a fire occurs;

[0167] 5. Flooding caused by water spreading from adjacent buildings or modules.

[0168] In addition to considering the above-mentioned internal flooding sources within the factory building, flooding caused by damage to water storage structures or equipment within the factory area outside the factory building should also be included.

[0169] Among them, for high-energy and medium-energy pipeline breaches, the released flow calculation formula is:

[0170] W=C D AG C

[0171] Where: W is the mass flow rate, C D is the discharge coefficient, A is the breach area, G C is the critical mass flow rate per unit area.

[0172] According to NB / T 20379-2016 "Design Criteria for Time Response of Operator Actions Related to Safety in Nuclear Power Plants", all safety-related operator actions and other operator actions that should be performed within 30 minutes (including 30 minutes) after the event indication time should be completed in the main control room. Therefore, except for special system designs, the leakage time is unified as 30 minutes.

[0173] According to the layout of each flood source, all potential flood sources in each flood zone are determined, and according to the flow of each flood source, the flood source with the largest flow in the flood zone is selected as the flood source for analysis.

[0174] The first calculation module is used to calculate the spreading path within the flooded area according to the flooded source.

[0175] Analyze all mitigation measures and possible spreading paths of the flood zone when internal flooding occurs, and provide input for the calculation of flood water level. Flood mitigation facilities include drainage systems and measures to limit spreading.

[0176] Among them, the ground drainage facilities in the flooded area should be considered to be blocked; stairwells, ground openings, ground casings, door openings, etc. are calculated according to the actual leakage flow; except for some special functions (such as pressure relief and explosion relief), the openings in the floor and walls have been blocked according to the hole blocking documents before the operation of the nuclear power plant. The calculation of the spread flow mainly refers to NB / T20591-2021, and the following considerations are taken into account:

[0177] 1. For watertight doors, unless they are proven to be able to withstand the load of the maximum flooding level in the flooded zone, they are generally not considered as spreading paths;

[0178] 2. For floor drains, considering the possibility of blockage, half of the designed flow rate of the floor drain is generally taken as the drainage flow rate;

[0179] 3. Stairwells and ground openings. The formula can be used:

[0180]

[0181] Where:

[0182] Q—flow rate, in m 3 / s;

[0183] b—free perimeter of the opening, in m;

[0184] g—gravitational acceleration, value is 9.8m 3 / s;

[0185] h—Flooding level upstream of the opening, in meters.

[0186] 4. Ground casing. The formula used is as follows:

[0187]

[0188] Where:

[0189] A—flow area, in m 2 ;

[0190] C—emission coefficient, generally taken as 0.6;

[0191] h—water level at the top of the casing, in m.

[0192] 5. Flow through the door opening. Use the following formula:

[0193]

[0194] Where:

[0195] b—the width of the door opening, in meters;

[0196] h—flood level, in m;

[0197] h0—height of the door below, in m;

[0198] h b —Water level in adjacent compartments (back pressure height), in m;

[0199] C e —Concentration coefficient: This value ranges from 0.57 to 1 and should be as conservative as possible.

[0200] 6. Gradient flow. Use the following formula:

[0201]

[0202] Where:

[0203] P—the wetted perimeter of the channel, in m;

[0204] h—flood level, in m;

[0205] x—flow length along the process, in m;

[0206] n—Manni roughness, unit is m 1 / 6 ;

[0207] V—average velocity on the cross section, in m / s;

[0208] A—Cross-sectional area of ​​the channel, in m 2 ;

[0209] C—constant, unit is m / s 2 .

[0210] The second calculation module is used to calculate the flooding height of the flooded area according to the spreading path.

[0211] The calculation formula for flooding height is as follows:

[0212]

[0213] Among them, the zone inflow is the leakage water volume of the potential flooding source in the zone, and the zone outflow is the drainage volume of the zone through drainage measures and diffusion paths.

[0214] According to the calculation formula, the calculation process of flooding height is as follows:

[0215] 1. According to the flood sources in the sub-area, analyze the most dangerous flood sources in the sub-area, and select the water source with the largest flow and water volume as the sub-area inflow. The sub-area inflow calculation formula is as follows:

[0216] Partition inflow = leakage flow × leakage time

[0217] The following aspects should be considered in determining the inflow volume of each zone:

[0218] 1. For the open water source system, compare the leakage flow rate during the leakage time with the design flow rate of the water source system, and take the smaller value of the partition inflow. In particular, if the leakage flow rate is greater than the design flow rate of the water source system, the water storage capacity in the water source system network should be considered;

[0219] 2. For the closed-loop water source system, calculate the total water volume and replenishment volume of the water source system, compare the leakage water volume during the leakage time with the total water volume in the water source system, take the smaller value of the partition inflow, and recalculate the leakage time based on the partition inflow;

[0220] 3. In case of water tank damage, the instantaneous release of the fluid in the water tank should be considered. The total amount of released fluid should be equal to the internal volume of the water tank. The subsequent leakage flow should take into account the impact of automatic water replenishment and auxiliary pipelines.

[0221] 2. Determine the outflow volume of the sub-area based on the drainage measures and spreading paths within the flooded sub-area. The outflow volume calculation formula is as follows:

[0222] Outflow from each zone = drainage volume of drainage measures + spreading water volume

[0223] Among them, the outflow volume of the partition should consider the following two aspects:

[0224] 1. The unavailability of drainage measures is taken into account when calculating the drainage volume of drainage measures. Drainage measures mainly include floor drains, drainage ditches, pits and drainage pumps;

[0225] 2. When calculating the spread water volume, the water volume discharged from the flooded areas including door gaps, thresholds, stairwells and ground openings, ground casings, door openings, gradient flows, etc. shall be calculated in accordance with NB / T 20591-2021.

[0226] 3. Determine the flooded area of ​​the zone based on the layout of all equipment in the flooded zone and in combination with a 3D model (such as Navisworks, smart3D, etc.);

[0227] 4. Use the flood height calculation formula to calculate the flood height within the zone.

[0228] The flooding determination module is used to determine the degree of flooding impact according to the flooding height and the parameters of the flood-prohibiting equipment.

[0229] Compare the equipment installation height and the flooding water level, determine the spraying impact of the flood-forbidden equipment, and analyze whether the flood-forbidden equipment is affected by internal flooding. In this way, the impact of internal flooding on the high-temperature gas-cooled reactor, that is, the flooding impact, can be obtained, so that designers can carry out flood-proof design or modify the original design according to the flooding impact, or improve the project after the project is completed, so as to make the operation of the high-temperature gas-cooled reactor safer.

[0230] It can be seen from the above technical scheme that this embodiment provides an internal flooding protection design device, which is applied to electronic equipment, specifically to identify prohibited flooding equipment that performs safety functions in high-temperature gas-cooled reactors; divide the internal flooding into flooding zones based on the prohibited flooding equipment; determine the flooding sources of the flooding zones; calculate the spreading paths within the flooding zones according to the flooding sources; calculate the flooding heights of the flooding zones according to the spreading paths; and determine the degree of flooding impact according to the flooding heights and the parameters of prohibited flooding equipment. The technical scheme provided by this application implements the internal flooding protection design based on the characteristics of the high-temperature gas-cooled reactor itself, and proposes appropriate improvement measures by analyzing and judging the impact of internal flooding on important safety equipment in nuclear power plants, so as to avoid the adverse effects of internal flooding on nuclear safety-related systems or equipment, thereby ensuring the safety of high-temperature gas-cooled reactors.

[0231] In addition, in a specific embodiment of the present application, the output module 70 is also improved, such as Figure 4 shown.

[0232] The improvement output module is used to output protection design improvement information according to the degree of flooding impact.

[0233] That is, if it is determined that the flood-proof equipment is affected by internal flooding, improvement suggestions are given. The improvement suggestions can refer to the following measures:

[0234] 1. Optimize the pipeline layout of the flood source system;

[0235] 2. Increase the installation height of flood prevention equipment;

[0236] 3. Improve the waterproof level of flood-proof equipment;

[0237] 4. Add thresholds, weirs and other measures to limit the risk of flooding;

[0238] 5. Add drainage facilities such as drainage ditches and collection pits.

[0239] By providing the above-mentioned improvement information through this module, it is convenient for designers to further improve the design plan according to the improvement information, and there is a ready-made basis in the process of improving the plan.

[0240] The units involved in the embodiments described in the present disclosure may be implemented by software or hardware. The name of a unit does not limit the unit itself in some cases. For example, the first acquisition unit may also be described as a "unit for acquiring at least two Internet Protocol addresses".

[0241] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0242] Figure 5 A block diagram of an electronic device according to an embodiment of the present application.

[0243] Reference below Figure 5 , which shows a schematic diagram of the structure of an electronic device suitable for implementing the embodiments of the present disclosure. The terminal device in the embodiments of the present disclosure may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. The electronic device is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0244] The electronic device may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 501, which can perform various appropriate actions and processes according to a program stored in a read-only memory ROM 502 or a program loaded from an input device 506 into a random access memory RAM 503. In the RAM, various programs and data required for the operation of the electronic device are also stored. The processing device, ROM, and RAM are connected to each other via a bus 504. An input / output (I / O) interface 505 is also connected to the bus 504.

[0245] Typically, the following devices may be connected to the I / O interface: input devices including, for example, a touch screen, a touchpad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; output devices 507 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 508 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 509. The communication device 509 may allow the electronic device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows an electronic device with various devices, it should be understood that it is not required to implement or have all the devices shown. More or fewer devices may be implemented or have alternatively.

[0246] The present application also provides a computer-readable storage medium embodiment.

[0247] The computer-readable storage medium is applied to an electronic device and carries one or more computer programs. When the one or more computer programs are executed by the electronic device, the electronic device identifies the flood-proof devices that perform safety functions in the high-temperature gas-cooled reactor; divides the internal flooding into flooding zones based on the flood-proof devices; determines the flooding sources of the flooding zones; calculates the spreading paths within the flooding zones based on the flooding sources; calculates the flooding heights of the flooding zones based on the spreading paths; and determines the degree of flooding impact based on the flooding heights and the parameters of the flood-proof devices. The technical solution provided in this application implements the internal flooding protection design based on the characteristics of the high-temperature gas-cooled reactor itself, analyzes and determines the impact of internal flooding on important safety equipment in nuclear power plants, and proposes appropriate improvement measures to avoid the adverse effects of internal flooding on nuclear safety-related systems or equipment, thereby ensuring the safety of the high-temperature gas-cooled reactor.

[0248] It should be noted that the computer-readable medium disclosed above may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer 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 above.

[0249] In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, apparatus, or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0250] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0251] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0252] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0253] The technical solution provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An internal flooding protection design method, applied to electronic equipment, characterized in that: The internal flooding protection design method comprises the steps of: Identify flood-proof equipment that performs safety functions in high-temperature gas-cooled reactors; Dividing internal flooding into flood zones based on the flood-proof device; Determining a source of flooding in the flooded zone; Calculate the spreading path within the flooded area according to the flooded source; Calculate the flooding height of the flooded zone according to the spreading path; The degree of flooding impact is determined according to the flooding height and the parameters of the flooding prevention device.

2. The internal flooding protection design method according to claim 1, characterized in that: The method for identifying flood-proof equipment that performs safety functions in a high-temperature gas-cooled reactor comprises the following steps: Identifying key systems of the high temperature gas-cooled reactor; determining a plurality of key devices from the key systems; Part or all of the key equipment are determined to be the flood-prohibited equipment from among the multiple key equipment.

3. The internal flooding protection design method according to claim 2, characterized in that: The flood-forbidden equipment also includes equipment whose risk contribution or importance meets preset conditions, and equipment that may be affected by the same flooding accident and cause multi-module initiating events to occur.

4. The internal flooding protection design method according to claim 1, characterized in that: The flooding sources include leakage / damage of pipes, damage / overflow of water tanks, failure of equipment isolation, normal operation of fire protection systems, and spread from adjacent areas to this area.

5. The internal flooding protection design method according to claim 1, characterized in that: The step of calculating the flooding height of the flooded zone according to the spreading path comprises the following steps: Select the inflow of the flood source with the largest flow and water volume as the zone inflow; Determine the outflow of the subarea according to the drainage measures of the flooded subarea and the spreading path; The flooding height is obtained by calculating according to the subarea inflow, the subarea outflow and the flooded area of ​​the flooded subarea.

6. The internal flooding protection design method according to any one of claims 1 to 5, characterized in that: Also includes the steps: Output protection design improvement information according to the flooding impact level.

7. The internal flooding protection design method according to claim 6, characterized in that: The protection design improvement information includes part or all of the pipeline layout improvement information of the flood source, the installation height improvement information of the anti-flooding equipment, the waterproof level improvement information of the anti-flooding equipment, the flood spread risk limiting device improvement information and the drainage facility improvement information.

8. An internal flood protection design device, applied to electronic equipment, characterized in that: The internal flood protection design device includes: An equipment identification module is configured to identify flood-prohibited equipment that performs safety functions in a high-temperature gas-cooled reactor; A zone division module is configured to divide the internal flooding into flood zones based on the flood-proof device; A flooding source determination module, configured to determine a flooding source of the flooded zone; A first calculation module is configured to calculate a spreading path within the flooded zone according to the flooded source; A second calculation module is configured to calculate the flooding height of the flooded zone according to the spreading path; The flooding determination module is configured to determine the flooding impact degree according to the flooding height and the parameters of the flooding prohibition device.

9. The internal flood protection design device according to claim 8, characterized in that: Also includes: The improvement output module is configured to output protection design improvement information according to the flood impact degree.

10. An electronic device, characterized in that: The method comprises at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs or instructions; The processor is used to execute the computer program or instruction so that the electronic device implements the internal flooding protection design method according to any one of claims 1 to 7.

11. A storage medium, applied to an electronic device, characterized in that: The storage medium carries one or more computer programs, and the one or more computer programs can be executed by the electronic device so that the electronic device implements the internal flooding protection design method according to any one of claims 1 to 7.

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