A method and system for fire risk assessment based on nuclear power plant building

Abstract

The present invention discloses a method and system for assessing the fire risk of a nuclear power plant, including: collecting the influencing variables of the first risk in the first object; obtaining the first reference variable of the subordinate object according to the distribution of the influencing variables in the subordinate object; obtaining the second reference variable of the subordinate object by analyzing the influencing factors of the subordinate object; and obtaining the first risk assessment result of the subordinate object by comprehensive analysis of the first reference variable and the second reference variable of the subordinate object. By classifying and assessing the fire risk of the plant, it effectively guides the fire management personnel to identify the risk level of the plant in advance, make corresponding handling plans, significantly improve work efficiency, reduce labor costs, and improve the effectiveness of on-site fire risk management and control.

Description

Technical Field

[0001] The present invention relates to the field of nuclear power plant fire protection technology, and in particular to a nuclear power plant building fire risk assessment method and system. Background Art

[0002] The fire risk status of a factory building is mainly divided into static fire risk assessment and dynamic fire risk assessment. The static assessment mainly gives the factory building color identification based on the assessment results of the inherent fire load of the factory building; the dynamic fire assessment is to dynamically evaluate the fire risk of rooms and factories by combining factors such as ignition source, increased fire load, opening of fire barriers, isolation and defects of fire protection systems, and mark them with colors to guide fire management personnel to carry out on-site fire risk control work. Summary of the invention

[0003] In view of the above-mentioned problems, the present invention is proposed.

[0004] Therefore, the technical problem solved by the present invention is that the risk assessment of existing methods lacks real-time and dynamic adjustment capabilities. Fire risk factors change dynamically over time and environmental conditions. Traditional static assessment methods are difficult to capture these changes, resulting in insufficient real-time performance and failure to reflect the latest status of risks in a timely manner. Lack of intuitive risk visualization. Traditional risk assessment methods are usually displayed through text or a single score, which cannot intuitively and quickly display the fire risk status of each area, and are not conducive to rapid response and management decisions.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for fire risk assessment based on nuclear power plant buildings, comprising:

[0006] Collecting influencing variables of the first risk in the first object;

[0007] According to the distribution of the influencing variable in the subordinate object, a first reference variable of the subordinate object is obtained;

[0008] By analyzing the influencing factors of the subordinate object, a second reference variable of the subordinate object is obtained;

[0009] The first risk assessment result of the subordinate object is obtained by comprehensively analyzing the first reference variable and the second reference variable of the subordinate object.

[0010] As a preferred solution of the nuclear power plant building fire risk assessment method described in the present invention, the first risk includes hidden danger risks that may occur during the use of the first object.

[0011] As a preferred solution of the nuclear power plant building fire risk assessment method according to the present invention, wherein: the influencing variable is the risk factor existing in the first object when assessing the first risk; including but not limited to inherent influencing variables and temporary influencing variables;

[0012] The influencing variable is a cause of occurrence of the first risk.

[0013] As a preferred solution of the nuclear power plant building fire risk assessment method according to the present invention, wherein: the subordinate object is a specific partition of the first object, and different influencing variables exist in each partition;

[0014] The first reference variable includes a specific part of the influencing variable in the first object distributed in the subordinate object.

[0015] As a preferred scheme of the nuclear power plant building fire risk assessment method described in the present invention, the second reference variable is, in each of the subordinate objects, the characteristic factor that suppresses the first risk; including but not limited to, risk prevention system and detection system.

[0016] As a preferred solution of the nuclear power plant building fire risk assessment method described in the present invention, wherein: the assessment result of the second state of the subordinate object includes direct risk judgment and integral judgment;

[0017] The direct risk assessment includes directly obtaining the risk level according to preset risk assessment rules.

[0018] As a preferred solution of the nuclear power plant building fire risk assessment method according to the present invention, the integral judgment includes: if the direct risk judgment of the first risk does not give a result, then analyzing by the risk score of the first risk;

[0019] The risk score is expressed as:

[0020]

[0021] Wherein, Z represents the zoning risk assessment score, with a full score of 100; w represents the preset corresponding weighted score under the specific category of the influencing variable, 1≤w≤10; z represents the score of the risk factor under the specific category of the influencing variable, 1≤z≤10; n represents the number of feature categories;

[0022] z n The specific value of includes setting 10 intervals from 1 to 10, calculating the quantitative results of the influencing variables in each category, analyzing the intervals where the quantitative results are located, and obtaining the scores corresponding to the intervals;

[0023] By establishing a numerical interval for the risk level, Z is compared with the upper and lower limits of the interval to obtain the risk level of the current partition.

[0024] A nuclear power plant building fire risk assessment system using any method described in the present invention, characterized in that:

[0025] A collection unit collects influencing variables of the first risk in the first object;

[0026] The extraction unit obtains a first reference variable of the subordinate object according to the distribution of the influencing variable in the subordinate object; and obtains a second reference variable of the subordinate object by analyzing the influencing factors of the subordinate object;

[0027] The analyzing unit comprehensively analyzes the first reference variable and the second reference variable of the subordinate object to obtain the first risk assessment result of the subordinate object.

[0028] A computer device comprises: a memory and a processor; the memory stores a computer program, wherein: the processor implements the steps of any one of the methods of the present invention when executing the computer program.

[0029] A computer-readable storage medium stores a computer program, wherein: when the computer program is executed by a processor, the steps of any one of the methods of the present invention are implemented.

[0030] Beneficial effects of the present invention: The fire risk assessment method based on the nuclear power plant provided by the present invention realizes a scientific, dynamic and refined assessment of the fire risk through a comprehensive analysis of various fire risk factors in the plant. First, by collecting the influencing variables in the plant, including inherent and temporary combustible materials, management and non-management factors, etc., a static and dynamic comprehensive analysis of the fire risk in each fire zone is performed. This multi-level and multi-dimensional variable collection and analysis method helps to accurately locate the risk source and risk level. Secondly, the first reference variable and the second reference variable are introduced to conduct an in-depth analysis of the combustible distribution, risk suppression measures and detection system of each partition in the plant, and the fire risk assessment score is calculated in combination with parameters such as fire load density and fire resistance limit, and an intuitive risk color identification is given. This comprehensive assessment method of direct judgment and integral judgment not only improves the accuracy and real-time performance of fire risk assessment, but also facilitates managers to quickly identify high-risk areas and take preventive measures in a timely manner. In addition, the method and system can be embedded in an intelligent nuclear power plant management system, and use real-time monitoring and dynamic assessment technology to provide an intelligent fire risk early warning function, thereby improving the overall safety of the nuclear power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0032] Figure 1 An overall flow chart of a nuclear power plant building fire risk assessment method provided for the first embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0034] Example 1, reference Figure 1 , which is an embodiment of the present invention, provides a method for assessing fire risk in a nuclear power plant building, comprising:

[0035] S1: Collect the influencing variables of the first risk in the first object.

[0036] The first risk includes hidden danger risks that may occur during the use of the first object.

[0037] The influencing variables are risk factors existing in the first object when evaluating the first risk; including but not limited to inherent influencing variables and temporary influencing variables; the influencing variables are inducements for the occurrence of the first risk.

[0038] In this embodiment, the first object is the nuclear power plant building, and the first risk is the fire risk. At this time, the influencing variables include all flammable materials. Initially, because the design of the fire partitions of each power plant meets the safety requirements and no additional fire risk operations such as open flames are carried out, they are initially in a safe state. After the fire partition stores fixed combustible materials or other combustibles, although the partition meets the fire protection requirements, the fire risk will increase. The fire risk of the partition can be evaluated according to the judgment criteria given by each power plant, and an evaluation score (or corresponding evaluation color) can be given.

[0039] 1) Scope of static assessment: inherent combustible materials and temporary combustible materials.

[0040] 2) Data source for the quantity of inherent combustible materials: combustible materials of type "fixed" in the combustible material information management corresponding to the room.

[0041] 3) Data source for the quantity of temporary combustible materials:

[0042] The number of combustible materials of type "temporary" in the combustible material information management.

[0043] The number of combustible materials approved by the data associated with the flammable and explosive material use license for the current time period of the corresponding room (the current time is between the application validity period).

[0044] The quantity of combustible materials associated with the temporary / fixed storage permit for the corresponding room during the current time period (the current time is between the application validity period).

[0045] 4) Since combustible materials need to be calculated according to their calorific value (MJ / kg) when used, the material unit is generally selected as kg.

[0046] 5) Calculation method of fire duration: Based on the fire load density If calculated for the protection area, find the international standard curve of fire duration-temperature.

[0047] 6) The inherent value of fire resistance limit is designed in the basic data. If it is not available, the design fire resistance limit of the nuclear power plant is generally taken as 1.5 hours.

[0048] 7) Calculation method of fire resistance limit ratio: fire duration / design fire resistance limit of fire compartment.

[0049] 8) Risk display should be indicated by color according to the fire resistance rating:

[0050] Table 1 Fire resistance ratio correspondence table

[0051] Risk Color Fire resistance ratio red Greater than 100% orange color 80％-100％ yellow 60％-80％ green Less than 60%

[0052] In an optional embodiment, the first risk can be expanded to other possible risk types. For example, leakage risk: some equipment in a nuclear power plant building may involve the risk of leakage of chemical substances or radioactive substances. These leaked substances may pose a hazard to other areas in the plant. Explosion risk: the accumulation of high pressure or explosive gas generated during storage or operation in a specific area may cause explosion risk.

[0053] The influencing variables include the following factors: Equipment aging: The aging or corrosion of equipment may increase the risk of leakage or explosion. Ambient humidity and temperature: Certain substances are prone to chemical reactions under high temperature and high humidity conditions, which may cause fire or explosion. Frequency of personnel activities: In areas with high frequency of activities, the risk of fire caused by personnel operations will also increase, such as welding or electrical equipment maintenance. Ventilation system condition: The operation of the ventilation system directly affects the accumulation of combustible gas or dust. If the ventilation system fails, it is easy to increase the risk of fire.

[0054] S2: obtaining a first reference variable of the subordinate object according to the distribution of the influencing variable in the subordinate object; and obtaining a second reference variable of the subordinate object by analyzing the influencing factors of the subordinate object.

[0055] The subordinate object is a specific partition of the first object, and different influencing variables exist in each partition. The first reference variable includes the influencing variables in the first object, distributed in a specific part of the subordinate object, that is, the number and category of the influencing variables in the partition. In this embodiment, the first reference variable is the number and category of combustibles in each partition.

[0056] The second reference variable is a characteristic factor that suppresses the first risk in each of the subordinate objects, including but not limited to risk prevention systems and detection systems. In this embodiment, it is specifically a fire prevention system: a fire protection system, a detection system, a fire barrier, etc.

[0057] In an optional implementation, focusing on the leakage risk in the nuclear power plant building, the first reference variable may be the type and quantity of chemical substances or radioactive substances, the number and pressure level of high-pressure pipelines in the partition, corrosion or aging conditions, etc. The second reference variable may be the pressure monitoring and automatic pressure relief system, chemical storage safety measures, emergency isolation and automatic shutdown system, etc.

[0058] S3: Comprehensively analyze the first reference variable and the second reference variable of the subordinate object to obtain the first risk assessment result of the subordinate object.

[0059] The evaluation result of the second state of the subordinate object includes direct risk judgment and integral judgment. The direct risk judgment includes directly obtaining the risk level according to a preset risk judgment rule.

[0060] The dynamic assessment of fire risk evaluates the risk level by combining possible fire risk factors and marking them with colors in the power plant protection zone distribution map. Each of the factors affecting fire risk is also affected by various conditions, and the weight of each factor on the fire risk is configured by the fire management department of each power plant according to their own management and on-site needs.

[0061] The influencing factors are divided into management factors and non-management factors:

[0062] Management factors: Determine whether there are corresponding management factors in the current fire protection zone (room). If yes, calculate based on the weighted score of the factors; if not, the corresponding score is 0.

[0063] Non-management factors: When dynamically assessing fire risk, the user needs to determine whether the current fire partition (room) has corresponding management factors. If so, the score is calculated; if not, no calculation is performed.

[0064] Direct fire risk assessment: If there are multiple operations with overlapping risks in the room, the score will not be calculated and the risk color will be given directly. The specific criteria are shown in Table 2.

[0065] Key fire protection area: The value is whether the current fire partition or associated room on the fire partition details page is a key fire protection area.

[0066] The hot work permit module obtains whether there is any level 1 or 2 hot work in the current room within a certain period of time.

[0067] At the same time, there is combustible material storage: temporary combustible material storage (combustible material information includes temporary combustible materials, flammable and explosive material use permit, and temporary / fixed storage permit for combustible materials).

[0068] Fire protection system failure or unavailability: Check the fire protection system list to check the equipment of the corresponding system in the room in front of the house.

[0069] Detection system failure or unavailability: Query the equipment of the corresponding system in the room through the detection system list.

[0070] At the same time, the fire barrier is open: Fire management module - the fire barrier status is open.

[0071] Table 2 Criteria table

[0072]

[0073] If the direct fire risk assessment does not give a result, the fire risk score is calculated using the fire risk score.

[0074]

[0075] Among them, Z represents the risk assessment score of a certain fire zone, with a full score of 100; w represents the preset corresponding weighted score under the risk category that affects the risk, 1≤w≤10; z represents the risk factor score under the corresponding risk category that affects the fire risk, 1≤z≤10; n represents the number of feature categories.

[0076] zn The specific numerical value includes setting 10 intervals of scores from 1 to 10, calculating the quantitative results of the influencing variables in each category, analyzing the intervals in which the quantitative results are located, and obtaining the scores corresponding to the intervals.

[0077] Each fire protection zone (factory building) has a full score of 100 points. If there is a certain risk, the risk score will be deducted, and the total score Z of the factory building will be calculated. By establishing a numerical range for the risk level, Z is compared with the upper and lower limits of the range to obtain the risk level of the current zone.

[0078] Embodiment 2: This embodiment also provides a nuclear power plant building fire risk assessment system, which includes:

[0079] The collecting unit collects the influencing variables of the first risk in the first object.

[0080] The extraction unit obtains the first reference variable of the subordinate object according to the distribution of the influencing variable in the subordinate object; and obtains the second reference variable of the subordinate object by analyzing the influencing factors of the subordinate object.

[0081] An analysis unit performs a comprehensive analysis of the first reference variable and the second reference variable of the subordinate object to obtain the first risk assessment result of the subordinate object.

[0082] If the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0083] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0084] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0085] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0086] Embodiment 3 is an embodiment of the present invention, which provides a method for assessing fire risk in nuclear power plant buildings.

[0087] In the dynamic assessment process of fire risk, data sources include: data source of available number of fire hydrants: querying fire hydrants whose equipment function code is fire hydrant and whose equipment operation status is online in the room in front of the house.

[0088] Number of hot work operations: Additional license module - hot work license module obtains whether there is any hot work in the current room within a certain period of time.

[0089] Number of fire barriers opened: Fire management module - the fire barrier status is open.

[0090] Number of inflammable and explosive items used in work: Additional license module - Inflammable and explosive items use license module obtains whether the current room has any within a certain period of time.

[0091] Newly added combustible materials (fire load): that is, temporary combustible material storage (combustible material information includes temporary combustible materials, flammable and explosive material use permit, and combustible material temporary / fixed storage permit).

[0092] Number of fire protection system isolations: Check the fire protection system list to see the equipment of the corresponding system in the room in front of the house.

[0093] Number of defects in fire-related systems: Check the equipment of the corresponding system in the room in front of the house through the fire system list

[0094] Table 3 Comparison of fire risk colors and corresponding scores

[0095] Fire risk color Points green Z＞95 yellow 90＜Z≤95 orange 80＜Z≤90 red Z≤80

[0096] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for assessing fire risk in nuclear power plant buildings, characterized in that: include: Collecting influencing variables of the first risk in the first object; According to the distribution of the influencing variable in the subordinate object, a first reference variable of the subordinate object is obtained; By analyzing the influencing factors of the subordinate object, a second reference variable of the subordinate object is obtained; The first risk assessment result of the subordinate object is obtained by comprehensively analyzing the first reference variable and the second reference variable of the subordinate object.

2. The method for assessing fire risk in nuclear power plant buildings according to claim 1, characterized in that: The first risk includes hidden danger risks that may occur during the use of the first object.

3. The method for assessing fire risk in nuclear power plant buildings according to claim 2, characterized in that: The influencing variables are risk factors existing in the first object when evaluating the first risk, including but not limited to inherent influencing variables and temporary influencing variables; The influencing variable is a cause of occurrence of the first risk.

4. The method for assessing nuclear power plant building fire risk according to claim 3, characterized in that: The subordinate objects are specific partitions of the first object, and different influencing variables exist in each partition; The first reference variable includes a specific part of the influencing variable in the first object distributed in the subordinate object.

5. The method for assessing nuclear power plant building fire risk according to claim 4, characterized in that: The second reference variable is, in each of the subordinate objects, a characteristic factor that suppresses the first risk; including but not limited to, a risk prevention system and a detection system.

6. The method for assessing nuclear power plant building fire risk according to claim 5, characterized in that: The evaluation result of the second state of the subordinate object includes direct risk judgment and integral judgment; The direct risk assessment includes directly obtaining the risk level according to preset risk assessment rules.

7. The method for assessing nuclear power plant building fire risk according to claim 6, characterized in that: The point judgment includes, if the direct risk judgment of the first risk does not give a result, analyzing by the risk score of the first risk; The risk score is expressed as: Wherein, Z represents the zoning risk assessment score, with a full score of 100; w represents the preset corresponding weighted score under the specific category of the influencing variable, 1≤w≤10; z represents the score of the risk factor under the specific category of the influencing variable, 1≤z≤10; n represents the number of feature categories; z n The specific value of includes setting 10 intervals from 1 to 10, calculating the quantitative results of the influencing variables in each category, analyzing the intervals where the quantitative results are located, and obtaining the scores corresponding to the intervals; By establishing a numerical interval for the risk level, Z is compared with the upper and lower limits of the interval to obtain the risk level of the current partition.

8. A nuclear power plant building fire risk assessment system using the method according to any one of claims 1 to 7, characterized in that: A collection unit collects influencing variables of the first risk in the first object; An extraction unit, which obtains a first reference variable of the subordinate object according to the distribution of the influencing variable in the subordinate object; By analyzing the influencing factors of the subordinate object, a second reference variable of the subordinate object is obtained; The analyzing unit comprehensively analyzes the first reference variable and the second reference variable of the subordinate object to obtain the first risk assessment result of the subordinate object.

9. A computer device comprising: A memory and a processor; the memory stores a computer program, wherein the processor implements the steps of any method as claimed in claim 1 when executing the computer program.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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