WO2023233513A1

WO2023233513A1 - Consumable management device and consumable management method

Info

Publication number: WO2023233513A1
Application number: PCT/JP2022/022098
Authority: WO
Inventors: 剛伊藤; 尚幸河野; 忍大城戸; 茂樹大野; 明彦平野
Original assignee: 日立Ｇｅニュークリア・エナジー株式会社
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2023-12-07

Abstract

This consumable management device (100) is for managing consumables used in apparatuses that constitute system functions in a nuclear power generating plant, and includes: a consumable importance determination unit (11) that determines the importance of consumables; a consumable performance monitoring unit (12) that monitors the performance and reliability of the consumables on the basis of the importance of the consumables; a consumable soundness evaluation unit (13) that predicts the remaining life of each consumable from state information about the consumable and evaluates the soundness on the basis of the assumed remaining life of the consumable; and a preventive maintenance planning unit (14) that plans preventive maintenance on the basis of the evaluation by the consumable soundness evaluation unit.

Description

Consumables management device and consumables management method

The present invention relates to a consumables management device and a consumables management method for consumables for equipment such as nuclear power plants.

Nuclear power plants are comprised of hundreds of systems and numerous pieces of equipment, and in order to maintain safety and demonstrate the performance of the power plant, maintenance activities are carried out to maintain and improve reliability. It is being implemented.

The equipment maintenance planning support system of Patent Document 1 inputs plant design/operation information and risk information, evaluates the importance of plant equipment/equipment, and outputs importance rank information of the plant equipment/equipment. A support system, a risk information evaluation system that inputs plant design/operation information and risk information, determines whether or not online maintenance can be performed, and outputs information on whether or not online maintenance can be performed, and a risk information evaluation system that inputs operation history information of plant equipment and equipment. An equipment failure information processing system that outputs to the equipment failure database, inputs the equipment failure database information, calculates the equipment failure rate, and outputs the equipment failure rate information, and the importance rank information of plant equipment and equipment and online maintenance implementation. It is disclosed that the system includes an equipment maintenance method selection support system that selects a maintenance method for plant equipment and equipment by inputting availability information and equipment failure rate information, and outputs equipment maintenance method information.

Japanese Patent Application Publication No. 2006-252311 Japanese Patent Application Publication No. 2019-007852

In Patent Document 1, in order to determine a maintenance method for equipment and equipment, the importance of equipment and equipment is determined using various levels of importance and risk information related to safety and power supply functions as criteria for determining the importance. However, no technology has been disclosed for evaluating the importance and reliability of consumables.

In general, for consumables (parts whose performance deteriorates over time and must be replaced after a certain period of time) used in equipment in facilities such as nuclear power plants, the replacement cycle is written in the instruction manual, etc., and periodic inspections are carried out. Based on the results, a list of parts to be replaced is determined. The replacement cycle of these consumables is determined based on estimated values from life tests, empirical values, and the like.

For example, Patent Document 2 discloses that for EQ (Environmental Qualification) equipment that requires environmental resistance performance in nuclear power plants, the lifespan and replacement timing of the EQ equipment are determined from the environmental measurement results, and the equipment is managed and maintained appropriately. This is disclosed.

Previously, consumables with a limited lifespan were regularly inspected and replaced. However, for parts with large variations in service life, setting a short replacement cycle not only reduces reliability due to excessive maintenance but is also uneconomical, so it is recommended to set an average replacement cycle based on experience. Become. As a result, there have been problems in that failures occur within a short period of time after replacement, and that the parts are replaced even though they still have some remaining life.

The present invention is an invention to solve the above-mentioned problems, and an object of the present invention is to provide a consumables management device and a consumables management method that can appropriately manage consumables used for equipment in maintenance activities of a nuclear power plant. shall be.

In order to achieve the above object, the consumables management device of the present invention is a consumables management device that manages consumables used in equipment constituting the system function in a nuclear power plant, the consumables management device managing the consumables used in the equipment constituting the system function in a nuclear power plant. a consumables importance determining unit that determines the importance of the consumable based on the importance of the consumable, and a consumables performance monitoring unit that monitors the performance and reliability of the consumable based on the importance of the consumable. a consumables health evaluation section that predicts the remaining life of the consumables based on the state information of the consumables and evaluates the health of the consumables based on the predicted remaining lifespan; and an evaluation of the consumables health evaluation section. and a preventive maintenance planning department that plans preventive maintenance based on the above. Other aspects of the present invention will be explained in the embodiments described below.

According to the present invention, consumables used in equipment during nuclear plant maintenance activities can be appropriately managed.

1 is a diagram showing the configuration of a consumables management system according to the present embodiment. FIG. 1 is a block diagram showing the configuration of a consumables management device according to the present embodiment. FIG. 3 is a diagram showing relationships among element functions, devices, and consumables. It is a figure showing an example of consumables used for equipment. FIG. 3 is a diagram showing an example of a class classification determination table. It is a diagram showing an example of configuration data of a device management DB. It is a diagram showing an example of configuration data of a maintenance activity/monitoring item DB. It is a diagram showing an example of configuration data of a sensing DB. It is a figure showing the example of composition data of FMEA DB. It is a diagram showing an example of configuration data of a field data DB. FIG. 3 is a diagram showing an example of a correspondence table of systems, functions, and components. FIG. 7 is a diagram illustrating an example of A class determined by a consumables importance determination unit. FIG. 7 is a diagram illustrating an example of B class determined by a consumables importance determination unit. FIG. 6 is a diagram illustrating an example of C class determined by a consumables importance determination unit. FIG. 3 is a diagram showing an example of a consumables monitoring classification table used by the consumables performance monitoring unit and the consumables health evaluation unit. It is a figure which shows the example of remaining life evaluation data of a consumable goods health evaluation part. It is a figure which shows remaining life evaluation data after correction|amendment of a consumable goods health evaluation part. FIG. 7 is a diagram illustrating a method for selecting a threshold value of a consumable life in a corrective action department. FIG. 3 is a diagram showing consumable life threshold data for each consumable class. FIG. 7 is a diagram illustrating regular inspection cycle extension processing by the preventive maintenance planning department.

Embodiments for implementing the present invention will be described in detail with reference to the drawings as appropriate.
This embodiment proposes a consumables management device and a consumables management method that can appropriately manage consumables used in equipment in order to promote maintenance activities at nuclear power plants. First, terms, characteristics, etc. used in this embodiment will be explained.

In the present invention, the term "element function" is used for the system function of the system to be maintained. In the present invention, the functions of the system are first broken down into "elemental functions" such as pressure resistance, cooling, and flow rate control. Then, rather than classifying the importance based only on the functions required of the system, weights are assigned based on the importance of the "element functions" of the system that correspond to the functions required of the system. On the other hand, the devices that make up the system are weighted based on their necessity to fulfill their "elemental functions."

An example of weighting is shown in FIG. The details will be described later, but the elemental functions of the system are broken down into cooling functions, isolation functions, flow rate control functions, etc., and the importance of the functions is weighted as H (High), M (Middle), and L (Low). are doing. On the other hand, the necessity of components for equipment is weighted as H (High), M (Middle), L (Low), and no contribution. In this way, one of the features is that the relationship between systems and equipment can be clarified using "element functions" as a medium.

Based on the class classification determination table 26 shown in FIG. Depending on necessity, the importance of equipment maintenance is classified (determined) into classes (class A, class B, class C).

In Japan, the relative importance of the functions necessary to ensure the safety of light water reactor facilities for power generation is determined from a safety perspective, and the design of structures, systems, and equipment is classified into classes according to their importance. Classified as 1, class 2, and class 3. In conventional maintenance, when setting the importance of maintenance, the importance of maintenance is first determined based on the safety importance of the system, and then the maintenance importance of equipment is classified based on the impact that equipment failure has on system function. ing.

<Consumables management system>
FIG. 1 is a diagram showing the configuration of a consumables management system 300 according to this embodiment. The consumables management system 300 includes a consumables management device 100 and a database device 200 that is an external storage device. The consumables management device 100 includes a processing section 10, a storage section 20, an input section 30, an output section 40, and a communication section 50.

The processing unit 10 includes a consumables importance determination unit 11 that determines the importance of consumables based on the importance of the equipment constituting the system function (equipment class), and a consumables importance determination unit 11 that determines the importance of consumables based on the importance of the consumables. A consumables performance monitoring unit 12 that monitors performance and reliability, and a consumables health evaluation unit that predicts the remaining life of the consumable based on the status information of the consumable and evaluates the health of the consumable based on the predicted remaining life of the consumable. 13, a preventive maintenance planning department 14 that plans preventive maintenance based on the evaluation by the consumables health evaluation department, a corrective action department 15 that corrects the life margin of consumables based on the importance of the consumables, and The performance history, life history, margin change history, etc. of consumables in the performance monitoring unit 12, consumables health evaluation unit 13, and corrective action unit 15 are aggregated to understand the status of consumables from installation to replacement. It has a life cycle management department 16, etc.

The storage unit 20 includes a system/function/component correspondence table 21, maintenance activity extraction information 22, field data extraction information 23, FMEA extraction information 24, sensing extraction information 25, and class classification for determining the importance of consumables. A determination table 26, a consumables monitoring classification table 27, consumables life evaluation data 28, consumables lifespan threshold data 29, etc. are stored.

In FIG. 1, the processing unit 10 is a central processing unit (CPU), and executes various programs stored in the RAM, HDD, etc. The storage unit 20 is an HDD, and stores various data for the consumables management device 100 to execute processing. The input unit 30 is a device such as a keyboard and a mouse for inputting instructions to the computer, and inputs instructions such as starting a program. The output unit 40 is a display or the like, and displays the execution status and execution results of processing by the consumables management device 100. The communication unit 50 exchanges various data and commands with other devices via the network NW.

The database device 200 includes a configuration management DB 210, a maintenance activity/monitoring item DB 220, a sensing DB 230, an FMEA DB 240, a field data DB 250, and the like. Note that DB means a database. FMEA is an abbreviation for Failure Mode and Effect Analysis, and is a systematic analysis method for potential failures with the aim of preventing failures and defects.

The data stored in each DB will be explained.
The configuration management DB 210 is a database that includes design requests, design documents, and actual data for the power plant.
The maintenance activity/monitoring item DB 220 is a database containing information on maintenance activities and monitoring items of the power plant, that is, their contents, frequency, and target deterioration events.
The sensing DB 230 is a database including deterioration modes covered and measurement methods (principles, sensor installation locations, etc.) regarding sensing technologies applicable to power plants.
FMEA DB240 is a database containing information on the deterioration mode of equipment that makes up a power plant, that is, failure location, deterioration mechanism, deterioration effect, deterioration severity, deterioration frequency, and effective maintenance activities and monitoring items. be.
The field data DB 250 is a database that includes data obtained on site, such as maintenance activity results (inspection results, test results, etc.), data before inspection and maintenance, daily monitoring data, and the like.

<Summary of consumables management processing>
FIG. 2 is a block diagram showing the configuration of the consumables management device 100 according to this embodiment. An overview of the consumables management process will be shown using FIG.

The consumables importance determining unit 11 determines the importance of the consumables used in the equipment, based on the importance (equipment class) of the equipment to be maintained at the nuclear power plant. The consumables importance determination unit 11 extracts the relationship between the system, the element functions of the system, and the equipment that constitutes the system, and determines the importance of the system functions of the system in units of "element functions" for the system to be maintained. Devices are classified (determined) into three classes (Class A, Class B, and Class C) depending on the nature of the device and the necessity of the component device to realize the "element function." Class A is the most important class, class C is a corrective maintenance class that is operated until maintenance is achieved, and class B is an intermediate class that is less important than class A.

If the equipment to be maintained is class A, the consumables used for it will also be determined as the most important class. When the equipment to be maintained is class B, the consumables used therein are also of an intermediate class, which is less important than class A equipment. If the equipment to be maintained is class C, the consumables used therefor are determined to be in the corrective maintenance class.

The consumables importance determination unit 11 determines the importance of consumables, worker exposure dose information, work information from equipment loss of function to recovery and information on the time required, and information on the impact on plant operation in the event of loss of function. The importance of consumables may be determined using the following.

The consumables performance monitoring unit 12 monitors the performance and reliability of consumables based on the importance of the consumables. Monitoring methods vary in monitoring frequency and monitoring content based on importance. For example, in the case of class A, the frequency of monitoring is every △ days, and in the case of class C, the frequency of monitoring is every 〇 months. The consumables performance monitoring unit 12 refers to the determination results of the consumables importance level determining unit 11, the evaluation results of the consumables health evaluation unit 13, the maintenance plan results of the preventive maintenance planning unit 14, and the correction results of the corrective action unit 15. , monitor consumables performance.

The consumable health evaluation unit 13 predicts the remaining life of the consumable based on the state information of the consumable, and evaluates the health of the consumable based on the predicted remaining life of the consumable. The consumables health evaluation section 13 evaluates the health of the consumables based on the determination result of the consumables importance determination section 11, the evaluation result of the consumables health evaluation section 13, and the correction result of the corrective action section 15.

The preventive maintenance planning section 14 plans preventive maintenance based on the evaluation results of the consumables health evaluation section 13. The preventive maintenance planning unit 14 makes a plan as to whether or not to extend the inspection cycle, for example (see FIG. 15).

The corrective action unit 15 corrects the life margin of the consumables based on the importance of the consumables. The corrective action unit 15 determines a threshold value of the consumable lifespan based on the importance of the consumable, for example. The threshold value of consumables is determined according to class A, class B, and class C (see FIG. 16).

The life cycle management section 16 manages the life cycle of consumables based on the evaluation results of the consumables health evaluation section 13, the correction results of the corrective action section 15, and the monitoring results of the consumables performance monitoring section 12.

FIG. 3 is a diagram showing the relationship between element functions, equipment, and consumables. In this embodiment, the functions of the system are broken down into "element functions" such as a cooling function, an isolation function, a flow rate control function, and the like. Each elemental function is composed of a plurality of devices that are the constituent devices of the system. The component equipment uses multiple consumables. As mentioned above, instead of classifying the importance based only on the functions required of the system, the importance of the "element functions" of the system corresponding to the functions required of the system are weighted and the system is constructed. Devices are weighted based on their necessity to fulfill their "elemental functions," and their importance is classified (determined) from both perspectives.

FIG. 4 is a diagram showing an example of consumables used in the equipment. A gate valve 70 is shown in FIG. The gate valve 70 includes a handle 71, a valve stem 72, an upper base 73, a lower base 74, a valve seat 75, and the like. The gate valve 70 uses EPDM (ethylene propylene diene rubber) O-

rings

76 and 77 as consumables. The gate valve 70 is also called a gate valve, and has a straight flow path, so the pressure loss is small, and is used to either allow the fluid to flow with force when it is completely opened, or to stop the fluid completely when it is completely closed. be done.

Consumables used in nuclear power-related equipment include resin products (packing, sealing materials, oil, coating materials, sheets, etc.) and metal products (bearings, etc.).

Returning to FIG. 1, an example of the class classification determination table and the configuration data of each DB will be explained.
<Class classification judgment table>
FIG. 5 is a diagram showing an example of the class classification determination table 26. The classes (class A, class B, class C) are classified based on a matrix of the importance of elemental functions and the necessity of component devices that realize the elemental functions. The vertical axis is the importance of the element function, and the horizontal axis is the necessity of the device for the element function. The importance of elemental functions is classified into three categories: H (High), M (Middle), and L (Low). The necessity of the function is classified into four categories: H (High), M (Middle), L (Low), and no contribution (-).

Class A is a case where the importance of the element function is "H" and the necessity of the device is "H". Class B: If the importance of the elemental function is "H" and the necessity of the device is "M" or "L", the importance of the elemental function is "M" and the necessity of the device is "M" or "L". In the case of "H" or "M", the importance of the element function is "L" and the necessity of the device is "H".
For class C, if the importance of the element function is "H" and the necessity of the device is "-" (no contribution), the importance of the element function is "M" and the necessity of the device is "-" (no contribution). In the case of "L" or "-", the importance of the element function is "L" and the necessity of the device is "M", "L", or "-".

<Example of configuration data for each DB>
FIG. 6 is a diagram showing an example of configuration data of the configuration management DB 210. The configuration management DB 210 is composed of categories and their configuration data. Categories include design requirements, facility configuration information, and physical configuration. For example, design requirements include laws and regulations, design standard documents, and calculation/analysis results.

For example, consumables information indicating the contents of consumables to be replaced for maintenance of the EQ device is also included. Consumables information includes consumables name, consumables model number, EQ equipment used, consumables specifications, consumables price, availability period, replacement time, work procedure, last replacement date, recommended lifespan, remaining lifespan, limit test results, and compatibility. There are product names, etc.

The consumable item name is the name of the target consumable item to be replaced. The consumable item model number is identification information of the part to be replaced. The name of the EQ device used is the name of the EQ device that uses the consumables. The consumable product specifications are information indicating dimensions, shape, material, performance, environment resistance specifications, etc.

The consumables price is the purchase price of the consumables. The availability period is the period during which consumables can be obtained. The replacement time is the time required to replace consumables in the EQ device. The work procedure is information indicating the procedure for replacing consumables in the EQ device. It may be link information of a procedure manual file or a web page showing the procedure.

The last replacement date is the date and time of the last consumable replacement. The elapsed date and time from the last replacement date to the current replacement is the operating time of the consumable. The recommended life span is the recommended operating time in a predetermined usage environment. Replace consumables so that the operating time does not exceed the recommended time. The remaining life indicates the remaining operating time in the usage environment. If the remaining life is longer than the period until the next maintenance work, there is no need to replace it during the current maintenance work.

The limit test results are information for referring to the limit test results of the life characteristics of consumables for each usage environment. It may also be link information of the test result file. The compatible product name is information indicating the name of a replaceable consumable product.

FIG. 7 is a diagram showing an example of the configuration data of the maintenance activity/monitoring item DB 220. The maintenance activity/monitoring item DB 220 has data on maintenance activities, maintenance frequency, target deterioration events, etc., and data on monitoring items, monitoring frequency, target deterioration events, etc. Specifically, if the target equipment is 〇〇 valve, it can be seen that non-destructive inspection of 〇〇 is conducted every 〇 years as a maintenance activity.

FIG. 8 is a diagram showing an example of configuration data of the sensing DB 230. The sensing DB 230 has data such as device name, failure location, deterioration mechanism, deterioration factor, measurement target, measurement method, and sensor installation location. According to FIG. 6, it can be seen that in the case of 〇〇 valve, there is a seal part as a failure site, and packing deterioration is expected.

FIG. 9 is a diagram showing an example of configuration data of the FMEA DB 240. The FMEA DB 240 contains data such as equipment names, deterioration modes, effective maintenance activities and monitoring items. The deterioration mode includes failure part, deterioration mechanism, deterioration effect, deterioration severity, and deterioration frequency. According to FIG. 9, it can be seen that in the case of the 〇〇 valve, there is a possibility that leakage may occur due to resin deterioration in the sealing part.

FIG. 10 is a diagram showing an example of the configuration data of the field data DB 250. The field data DB 250 in FIG. 10 corresponds to the maintenance activity/monitoring item DB 220 in FIG. Contains data such as monitoring results (actual results).

<Consumables importance determination section>
The consumables importance determination unit 11 uses the configuration management DB 210 to determine the system, the system function of the system, the elemental function of the system (system element function), and the equipment constituting the system, in order to prioritize the optimization of maintenance activities. Information with organized relationships is extracted and a system/function/component correspondence table 21 is output.

FIG. 11 is a diagram showing an example of the system/function/component correspondence table 21. The system/function/component correspondence table 21 is composed of the element functions that the system is responsible for, the importance of the function, the necessity of the component (system component device) for the function, etc.

The element functions that the system is responsible for include cooling function, isolation function, flow rate control function, etc., and the importance of each element function is weighted as H (High), M (Middle), and L (Low). Further, the necessity of the component for the function is weighted as H (High), M (Middle), L (Low), and no contribution (-). According to FIG. 11, for example, in the case of the cooling function, the importance of the function is "M", and it can be seen that the component with high necessity for that function is the pump.

According to FIG. 11, for example, if the elemental function that a system is responsible for is a "cooling function," the importance of that function is "M," and the necessity of a component for that function is "L" in the case of a valve. On the other hand, it can be seen that in the case of a pump, it is "H". In addition, when the elemental function that the system is responsible for is "isolation function", the importance of that function is "H", and the necessity of the component for the function is "no contribution" in the case of △△ valve. It can be seen that in the case of 〇〇 valve, it is “H”.

In the case of this embodiment, the importance is not classified only based on the functions required of the system, but is weighted (H, M, L) as the importance of the elemental functions of the system corresponding to the functions required of the system. do. On the other hand, one of the features is that the devices that make up the system are weighted (H, M, L, -) from the perspective of necessity in fulfilling their element functions.

The consumables importance determination unit 11 performs class classification (determination) based on the system/equipment/component correspondence table 21 and the class classification determination table 26. Classification (judgment) determines whether the equipment is important equipment necessary to maintain the important elemental functions that the system should perform (class A), equipment that is not essential for maintaining the relevant functions (class C), or other equipment (class B) is set.

FIG. 12A is a diagram showing an example of class A based on the consumables importance determination 11. The system/function/component correspondence table 21 is the same as the correspondence table shown in FIG. 11. In the case of "XX valve" in FIG. 12A, the importance of the isolation function is "H" and the necessity of the equipment is also "H" (see inside the thick line frame). Considering the importance of the function x the necessity of the equipment, the cooling function is M x M, and the flow rate control function is L x L, so the highest classification is used, that is, H x H. Therefore, it is classified (determined) as class A.

FIG. 12B is a diagram showing an example of the B class determined by the consumables importance determination unit 11. The system/function/component correspondence table 21 is the same as the correspondence table shown in FIG. 11. In the case of "◇◇ pump" in Figure 12B, looking at the importance of the function x the necessity of the equipment, the cooling function is M x H, the isolation function is H x L, and the flow control function is L x H (within the thick line frame). ), and is classified (determined) as class B based on the highest case.

FIG. 12C is a diagram showing an example of the C class determined by the consumables importance determination unit 11. The system/function/component correspondence table 21 is the same as the correspondence table shown in FIG. 11. In the case of "△△valve" in Figure 12C, when looking at the importance of the function x the necessity of the equipment, the cooling function is M x L, the isolation function is H x -, and the flow control function is L x M (within the thick line frame). ), and it is classified (determined) as class C based on the highest case.

<Consumables monitoring classification table>
FIG. 13 is a diagram showing an example of the consumables monitoring classification table 27 used by the consumables performance monitoring section 12 and the consumables health evaluation section 13. FIG. 13 is a consumables monitoring classification table for seal members. In FIG. 13, EQ test data is test data for environmental performance assurance (EQ) of equipment at a nuclear power plant. As found data refers to data acquired during driving patrols and driving tests, and data acquired during periodic inspections and from consumables removed during periodic inspections.

If the seal member is static, confirmation of the amount of wear is classified based on whether or not it can be confirmed from the outside. If it can be confirmed from the outside, the life evaluation will use initial value data, EQ test data, data obtained during operation, and As found data after use. On the other hand, if it cannot be confirmed from the outside, initial value data, EQ test data, and As found data after use are used for life evaluation.

If the seal member is dynamic, confirmation of the amount of wear is classified based on whether or not it can be confirmed from the outside. If it can be confirmed from the outside, the life evaluation will use initial value data, EQ test data, data obtained during operation, and As found data after use. On the other hand, if it cannot be confirmed from the outside, initial value data, EQ test data, and As found data after use are used for life evaluation.

<Consumables Health Evaluation Department>
FIG. 14A is a diagram showing an example of consumable life evaluation data 28 of the consumable health evaluation section. Consumables life evaluation data 28A in FIG. 14A shows time-lapse data of compression set of the seal member. There is a large difference in the compression set value between the severe environment data (EQ test data) and the normal environment data over time.

The consumables health evaluation unit 13 evaluates the life characteristics related to operating time based on the dimensions (initial dimensions), shape, or physical properties of the consumables before use, and dimensional changes such as compression set at the limit of use, shape changes, or physical property deterioration. Obtain the limit test results showing . Then, the remaining life of the consumable parts is predicted from the condition of the equipment based on the limit test results.

The consumable health evaluation unit 13 evaluates the remaining life of the consumable, taking into account the effects of deterioration according to the usage conditions of the consumable. Conditions of use that affect deterioration include temperature, radiation dose, characteristics of fluids that come into contact with the consumable (gases, steam, water, pH), or chemicals that accelerate the corrosion of the consumable (alkali metals, lanthanides, actinides). , transition metals, halogens, chalcogen elements).

FIG. 14B is a diagram showing the corrected consumable life evaluation data 28 of the consumable health evaluation unit 13. Consumables life evaluation data 28B in FIG. 14B shows data (corrected values indicated by broken lines) that has been corrected so that estimation can be made more in line with the actual machine. The consumables health evaluation section 13 utilizes the time-lapse data of the compression set of the seal member, the EQ test results, the in-operation data, and the As found data, corrects the initial EQ test results, and estimates the compression set more closely to the actual machine. I do. At this time, it is preferable that the consumables health evaluation unit 13 group the materials in each environment and evaluate the same materials used in different devices by looking at the data cross-sectionally.

In the case of the example in Figure 14B, the correction value for the harsh environment is corrected so that the compression set is larger than the data before correction, so it is expected that the deterioration will tend to increase and the life of the material will be shortened. be done.

Furthermore, the consumables health evaluation unit 13, for example, actually measures the dimensions of the consumables as actual machine data, and evaluates the remaining life based on the amount of change from the initial dimensions. At this time, it is desirable that the consumables health evaluation unit 13 consider the dimensional variations of the consumables and evaluate the remaining life of parts with large dimensional variations to be short.

The consumables health evaluation unit 13 performs one or both of the following: evaluating the remaining life based on actual use, and evaluating the remaining life by taking into account the deterioration of the consumable in accordance with the usage conditions of the consumable.

<Corrective Measures Department>
FIG. 15 is a diagram illustrating a method for selecting the threshold value of the consumable life by the corrective action unit 15. Although FIG. 14 shows the time course of compression set of the seal member, the threshold value is important in determining the life span of the seal member. In FIG. 15, consumable life threshold data 29 is shown.

FIG. 15 shows two life curves: data from only the EQ test (solid line data) and data combining the EQ test and As found data (dashed line data). Generally, in the case of highly reliable equipment, the threshold value for determining the lifespan is set to be low (strict), and in the case of general equipment, the threshold value for determining the lifespan is set to be high. If the threshold value is set higher, the expected lifespan will be extended, but the risk of leakage will increase, which is not preferable for highly reliable equipment. Further, if all consumables are uniformly set to a lower threshold value, the time for replacing the consumables becomes earlier, which is not preferable from the viewpoint of equipment maintenance. Here, the highly reliable equipment is equipment used in the aviation industry, space industry, energy industry, nuclear industry, etc.

In the present embodiment, the corrective action unit 15 corrects the life margin of the consumables based on the importance of the consumables. That is, a feature is that the threshold value for determining the lifespan is determined according to the importance of the consumable item (according to each class).

FIG. 16 is a diagram showing consumable life threshold data 29A for each consumable class. FIG. 16 shows the lifespan of each class of consumables according to the consumables health evaluation unit 13. The consumables health evaluation section 13 estimates the lifespan of the consumables according to the threshold selected by the corrective action section 15. FIG. 16 shows data (dashed line data) that is a combination of the EQ test and the As found data, and the consumable health evaluation unit 13 determines the consumable class ( The threshold value is selected according to the class (A class, B class, C class).

In the case of class A, the consumables health evaluation unit 13 determines that the lifespan of the target consumable is time Ta, in the case of class B, the lifespan of the target consumable is determined to be time Tb, and in the case of class C , it can be determined that the life of the target consumable is the time Tc.

It is preferable that the consumable health evaluation unit 13 determines the usage limit of the consumable based on the importance of the consumable and the deterioration parameter of the consumable (for example, compression effect strain).

The consumables health evaluation unit 13 evaluates the importance of the consumables, the usage limit information of the consumables (for example, the threshold value according to the class of the consumables (A class, B class, C class)), and the EQ test results of the consumables. It is a good idea to determine the replacement cycle for consumables.

<Preventive Maintenance Planning Department>
FIG. 17 is a diagram showing the periodic inspection cycle extension process S200 of the preventive maintenance planning section 14. The preventive maintenance planning unit 14 selects the importance of the determination result of the consumables importance determination unit 11 (processing S201), and determines whether the replacement cycle can be extended based on the actual value (processing S202). If the replacement cycle can be extended (Processing S202, Yes), the preventive maintenance planning unit 14 proceeds to Processing S203, and if the replacement cycle cannot be extended (Processing S202, No), it proceeds to Processing 211.

In process S203, the preventive maintenance planning unit 14 determines whether the extension period can be evaluated as one cycle or more, and if it can be evaluated as one cycle or more (process S203, Yes), the process proceeds to process S204, and the extension period is evaluated as one cycle or more. If the evaluation cannot be made (processing S203, No), the process advances to S211.

In process S204, the preventive maintenance planning unit 14 determines whether or not it is necessary to consider the technical requirements for extending the inspection, and if it is not necessary to consider them (process S204, Yes), the preventive maintenance planning unit 14 extends the inspection cycle (process S205). ), if the examination is not necessary (processing S204, No), the technical requirements for the case where the inspection is postponed are examined, and the inspection cycle is extended (processing S206).

In process S211, the preventive maintenance planning unit 14 determines whether the inspection can be extended by changing the replacement margin in the same way as for general consumables, and if it is possible to extend the inspection (process S211, Yes), the preventive maintenance planning unit 14 determines the technique for extending the inspection. The inspection period is extended (processing S212), and if the inspection period cannot be extended (processing S211, No), the process advances to processing S213.

In process S213, the preventive maintenance planning unit 14 determines whether the inspection can be extended by changing to consumables of other equipment, and if it is possible to extend the inspection (process S213, Yes), the preventive maintenance planning unit 14 sets technical requirements for changing consumables. Examine and change to consumables for other equipment (processing S214), and if extension is not possible (processing S213, No), continue operation with the current inspection cycle and consumables (processing S215).

The technical requirements in processes S206, S212, and S214 include whether abnormalities in consumables can be detected, whether emergency measures can be taken when an abnormality is detected, whether system functions can be maintained, and the risk of failure of the relevant equipment. These include incremental evaluations, organizational and security considerations, public safety impact assessments, and calculations of employee exposure levels associated with work.

For example, the maintenance activity extraction information 22 (see FIG. 1) is information extracted from the maintenance activity/monitoring item DB 220 before review. The FMEA extraction information 24 (see FIG. 1) is information extracted from the FMEA DB 240. From the FMEA extraction information 24, it can be seen that the packing deterioration of the seal portion is serious.

As a method for detecting abnormalities in class A consumables, one monitoring item is the temperature of the fluid near the seal. By monitoring during operation, aging deterioration of the packing due to heat can be detected at an early stage.

As part of the maintenance activities for Class B consumables, there is material analysis (hardness and compression set analysis) of the seal packing. By performing this at the time of overhaul inspection, it is possible to understand the aging of the packing and detect abnormalities in consumables.

As maintenance activities for Class A to C consumables, the same environment (temperature, radiation dose, characteristics of fluids that come into contact with consumables (gas, steam, water, pH), or chemicals that accelerate the corrosion of consumables) By reflecting the degree of deterioration of consumables used in (the use of alkali metals, lanthanides, actinides, transition metals, halogens, and chalcogen elements) in comparison and evaluation, data can be acquired efficiently and evaluation accuracy can be improved. can be improved.

The consumables management device 100 and the consumables management method of this embodiment described above have the following features.
(1) A consumables management device 100 that manages consumables used in equipment constituting system functions in a nuclear power plant, which manages consumables based on the importance (equipment class) of the equipment constituting system functions. A consumables importance determination unit 11 that determines the importance level, a consumables performance monitoring unit 12 that monitors the performance and reliability of consumables based on the importance level of the consumables, and a consumables performance monitoring unit 12 that monitors the consumables' performance and reliability based on the consumables' status information. A consumables health evaluation unit 13 that predicts the remaining life and evaluates the health of consumables based on the predicted remaining life of the consumables, and a preventive maintenance planning unit 14 that plans preventive maintenance based on the evaluation by the consumables health evaluation unit. and has. This makes it possible to appropriately manage consumables used in equipment during nuclear plant maintenance activities.

(2) The consumables importance determination unit 11 determines the importance of equipment for the system to be maintained, depending on the importance of each element function of the system function and the necessity of the component equipment that realizes the element function. It is preferable to determine the importance of maintenance, and determine the importance of consumables used for the equipment based on the importance of the equipment (see FIGS. 12A, 12B, and 12C).

(3) The consumables importance determination unit 11 determines the importance of consumables, worker exposure dose information, work information from equipment loss of function to recovery and information on the time required, and plant operation in the event of loss of function. It is recommended that the importance of consumables be determined by utilizing the impact information.

(4) The consumable health evaluation unit 13 may determine the usage limit of the consumable based on the importance of the consumable and the deterioration parameter of the consumable (see FIG. 15).

(5) The consumables health evaluation unit 13 calculates the importance of the consumables, the usage limit information of the consumables (for example, a threshold value according to the class of the consumables (A class, B class, C class)), and the EQ of the consumables. It is advisable to determine the replacement cycle for consumables based on the test results (see FIGS. 15 and 16).

(6) The consumables management device 100 further includes a corrective action unit 15 that corrects the life margin of the consumables based on the importance of the consumables (see FIG. 15).

(7) The consumables health evaluation unit 13 may estimate the remaining life of the consumables by correcting the initial EQ test results based on the EQ test results, in-operation data, and As found data of the consumables (Fig. 14B, see FIG. 15).

(8) A consumables management method of a consumables management device 100 that manages consumables used in devices constituting a system function in a nuclear power plant, the consumables management device 100 managing consumables used in devices constituting a system function. Determine the importance of consumables based on their importance, monitor the performance and reliability of consumables based on the importance of consumables, predict the remaining life of consumables from the status information of consumables, Evaluate the health of the product based on its expected remaining life, and plan preventive maintenance based on the health evaluation. This makes it possible to appropriately manage consumables used in equipment during nuclear plant maintenance activities.

(9) A consumables management method of a consumables management device 100 that manages consumables used in devices constituting system functions in a nuclear power plant, the consumables management device 100 managing consumables used in devices constituting system functions. Determine the importance of consumables based on their importance, monitor the performance and reliability of consumables based on the importance of the consumables and the usage environment, and check whether the consumables are used in different equipment if the usage environment is the same. It is a good idea to compare and evaluate the reliability of consumables and horizontally develop maintenance plans. This makes it possible to improve the reliability evaluation of consumables by checking the deterioration status of consumables used in different devices installed in the same environment.

Note that the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the embodiments described above are described in detail to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to having all the configurations described. Furthermore, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add, delete, or replace a part of the configuration of each embodiment with other configurations. Further, each of the above-mentioned configurations, functions, processing units, processing means, etc. may be partially or entirely realized in hardware by designing, for example, an integrated circuit. Furthermore, each of the above configurations, functions, etc. may be realized by software by a processor interpreting and executing a program for realizing each function. Information such as programs, tables, files, etc. that implement each function can be stored in a memory, a recording device such as a hard disk, an SSD (Solid State Drive), or a recording medium such as an IC card, SD card, or DVD.

10 Processing section 11 Consumables importance determination section 12 Consumables performance monitoring section 13 Consumables health evaluation section 14 Preventive maintenance planning section 15 Corrective action section 16 Life cycle management section 20 Storage section 21 System/function/component correspondence table 22 Maintenance Activity extraction information 23 Field data extraction information 24 FMEA extraction information 25 Sensing extraction information 26 Class classification determination table 27 Consumables monitoring classification table 28, 28A, 28B Consumables

life evaluation data

29, 29A Consumables lifespan threshold data 30 Input section 40 Output Section 50 Communication section 70 Gate valve 71 Handle 72 Valve stem 73 Upper base 74 Lower base 75 Valve seat 76, 77 O-ring (consumables)
100 Consumables management device 200 Database device 210 Configuration management DB
220 Maintenance activities/monitoring item DB
230 Sensing DB
240 FMEA DB
250 Field data DB
300 Consumables management system S200 Periodic inspection period extension processing

Claims

A consumables management device for managing consumables used in equipment constituting system functions in a nuclear power plant,
a consumables importance determination unit that determines the importance of the consumables based on the importance of the equipment constituting the system function;
a consumables performance monitoring unit that monitors the performance and reliability of the consumables based on the importance of the consumables;
a consumable health evaluation unit that predicts the remaining life of the consumable based on the state information of the consumable, and evaluates the health of the consumable based on the predicted remaining life of the consumable;
A consumables management device comprising: a preventive maintenance planning section that plans preventive maintenance based on the evaluation by the consumables health evaluation section.
The consumables importance determination unit determines the importance of equipment for maintenance, based on the importance of each elemental function of the system function of the system to be maintained, and the necessity of the component equipment that realizes the elemental function. The consumables management device according to claim 1, wherein the consumables management device determines the importance of consumables used for the device based on the importance of the device.
The consumables importance determination unit determines the importance of the consumables, information on the exposure dose of workers, information on work from loss of function of the equipment to recovery and information on the time required, and information on plant operation in the event of loss of function. The consumables management device according to claim 2, wherein the importance of the consumables is determined by utilizing influence information.
The consumables management device according to claim 3, wherein the consumables health evaluation unit determines a usage limit of the consumables based on the importance of the consumables and a deterioration parameter of the consumables.
4. The consumables health evaluation unit determines the replacement cycle of the consumables based on the importance of the consumables, usage limit information of the consumables, and EQ test results of the consumables. The consumables management device described.
The consumables management device further includes:
3. The consumables management device according to claim 2, further comprising a corrective action unit that corrects the life margin of the consumables based on the importance of the consumables.
The consumables health evaluation unit estimates the remaining life of the consumables by correcting the initial EQ test results based on the EQ test results, in-operation data, and As found data of the consumables. The consumables management device according to claim 1.
A consumables management method for a consumables management device that manages consumables used in equipment constituting system functions in a nuclear power plant, the method comprising:
The consumables management device determines the importance of the consumables based on the importance of devices constituting the system function, and monitors the performance and reliability of the consumables based on the importance of the consumables. , predicting the remaining life of the consumable from the condition information of the consumable, evaluating the health of the consumable based on the predicted remaining life of the consumable, and planning preventive maintenance based on the evaluation of the health. A distinctive consumables management method.
A consumables management method for a consumables management device that manages consumables used in equipment constituting system functions in a nuclear power plant, the method comprising:
The consumables management device determines the importance of the consumables based on the importance of devices constituting the system function, and determines the performance and reliability of the consumables based on the importance of the consumables and the usage environment. A consumables management method characterized by monitoring and comparing and evaluating the reliability of consumables used in different equipment in the same usage environment, and applying horizontal development to a maintenance plan.