JPH02243997A - Device for managing decreased-thickness piping of power plant, and method and device for outputting data thereof, and method of registering data - Google Patents

Abstract

PURPOSE:To allow rapid drafting of an exact inspection plan at the time of a periodical inspection or when the symptom of the abnormality in a piping is discovered by previously registering the data relating to pipings in a data base (memory device) and retrieving the data base when needed. CONSTITUTION:The device for management is constituted of a CPU 1, the large-capacity memory device 2, an auxiliary memory device 3 in which various kinds of programs are stored and an input/output device 5 provided with a CRT 4. Plant information, system information, piping number information, piping thickness decrease information, thickness decrease importance ranking information, system screen information and piping line color-coding information are previously registered in the device 2. A sub-system start program for the importance ranking of the decreased-thickness pipings, a sub-system start program for the color coding of the decreased-thickness piping lines and a sub-system start program for displaying the classifications of the importance of the thickness decreases are previously registered in the device 3. The CPU 1 controls, computes and compares the respective sets of the information and operates to display the table of the importance ranking of the decreased-thickness pipings on a CRT 4, to print out the same from the device 5, to display piping system diagrams and to display the classifications of the thickness decrease importance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for managing the state of thinning of pipes constituting a power generation plant, and in particular, a device for managing the thinning state of pipes constituting a power generation plant, and in particular, a device for managing the thinning state of pipes constituting a power generation plant. The present invention relates to a meat pipe management device, its data output method, device, and data registration method.

[Conventional technology]

When the various types of piping that make up a power generation plant are used for a long period of time, their wall thickness becomes thinner due to the fluid flowing inside them. Therefore, it is necessary to replace pipes that have been used to some extent, but the degree of wall thinning varies depending on where in the power plant the pipe is used. It is not constant depending on the type of fluid being used, its temperature, etc., and it is necessary to manage each pipe installed at various locations in a single power generation plant. Traditionally, this management has been done on paper, and when signs of abnormality are found in the power plant's piping or during periodic inspections, several people spend several days collecting and organizing a huge amount of related documents. There is-
is the current situation. The response process when signs of abnormality are observed is to document the piping that is presumed to be undergoing wall thinning, and then actually inspect the wall thickness of this piping using an ultrasonic device, etc. However, if an abnormality is found, first aid measures should be taken, the cause should be investigated and examined, and permanent measures should be taken. In this way, the first step in finding pipes that are presumed to be undergoing thinning on paper is to actually inspect and investigate all the pipes, as the number of pipes that make up a single power plant is enormous. This is because it takes a huge amount of time. In other words, this is because the deterioration of the abnormal area progresses during this inspection period, which may lead to an accident.

[Problem to be solved by the invention]

There are various factors that contribute to the progress of wall thinning in power plants, and not all of them are currently understood. There is a possibility that it will increase. Therefore, in addition to the current problem of not being able to process quickly, it is necessary to take measures that will be applicable in the future.

The purpose of the present invention is to provide a power generation plant thinning pipe management device, a data output method and device for the same, and a data output method and device for the same, which makes it possible to quickly formulate an accurate inspection plan during periodic inspections or when detecting signs of abnormality in the pipes. The purpose is to provide a registration method.

[Means to solve the problem]

The above objective is achieved by registering data regarding piping in a database and searching this database when necessary.

Data regarding piping should be registered in the database for each piping, including data on piping material, fluid type, fluid temperature, fluid wetness, and fluid flow rate, which are currently considered to be factors in wall thinning. Also, register the importance of thinning along with this data, or register the importance of thinning calculated from these data using a predetermined relational expression for the corresponding piping, and perform thinning according to the operator's specifications. Output for each level of importance. This output format is 1
Output in table format or as a piping system diagram. When outputting as a piping system diagram, the display color of the piping is changed depending on the importance of thinning.

[Effect]

During periodic inspections or when abnormal signs are discovered, this database can be searched to find pipes that are presumed to have advanced wall thinning6. Able to make plans.

(Example〕 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a hardware configuration diagram of a power plant thinning pipe management device according to an embodiment of the present invention. This management device is a central processing bag [! 1, a database (storage device) 2 that can store large amounts of data, an auxiliary storage device i3 that stores programs for starting various systems, and an input/output device 5 that includes a CRT 4. In the database 2, plant information, system information, piping number information, pipe thinning information, thinning importance rank information, system screen information, piping line color information, etc. are registered in advance. Similarly,
Registered in the auxiliary storage device 3 are a thinning pipe importance ranking subsystem starting program, a thinning piping line color-based subsystem starting program, and a subsystem starting program for displaying the thinning importance degree classification. The central processing unit 1 is
By controlling, calculating and comparing each of the above information, it is possible to display a weight loss piping importance ranking table on the CRT 4, print it out from the input/output device 5, display a piping system diagram, Display classification, etc.

FIG. 2 is a flowchart showing the processing procedure in the thinned pipe importance ranking subsystem.

When the operator wishes to output the thinned pipe importance rank output list shown in FIG. 5, first in step 21, the thinned pipe importance rank subsystem is selected. This is, for example, the initial screen of the thinning pipe management system shown in Figure 3.
By entering the number of this rank subsystem,
When the thinned pipe importance ranking subsystem is selected, the basic menu screen shown in FIG. 3 is displayed. When the operator specifies the thinned pipe importance rank output setting, the output setting screen is displayed. Therefore, step 22 in Figure 2
The plant name and system name you wish to output.

Specify the piping number, piping range, etc. In addition, in this example,
Rather than assigning a piping number to each individual piping,
Pipes with similar thinning factor parameters are assigned the same number. Therefore, even if the pipes are assigned the same number, if the wall thinning factor parameters change and become different, or if a new wall thinning factor parameter is found, a different number must be assigned, so the range of pipes assigned the same number may also change. It is a rule. Then, the central processing unit judges whether or not the piping number and piping range are clear among these specifications (Step 23), and if they are not clear, it goes to Step 24).
Proceed to , and output a list of all piping belonging to the system name in that plant. If the piping numbers and piping ranges are clear, there is no need to output the entire list, so the search items are specified in step 25, and a list is output for each search item in step 26.

In addition, in the list in Figure 5, the weight reduction importance rank is:
The degree of progression of pipe wall thinning is ranked, for example, in five stages based on a combination of wall thinning factor parameters, and the details will be described later. In addition, the piping line color is a display color set for each thickness reduction importance rank mentioned above, and the display color of each piping when displaying the piping system diagram described later is displayed for each rank. It is for.

When the operator selects a data entry, correction, or deletion item on the basic menu screen shown in Figure 3, the screen at the bottom left of Figure 3 is displayed interactively, asking whether or not to enter, modify, or delete data. come and ask. If data input is selected here, the thinning importance rank input/correction/deletion screen shown in FIG. 4 is displayed.

Therefore, the operator needs to know the plant name and system name.

Piping number, piping range, piping material, year of replacement, thinning factor parameters (fluid type, temperature, dissolved oxygen, humidity, flow rate)
, thickness reduction importance rank, and data for each item by pipe color are input, corrected, and deleted, and when the process is completed, a number indicating completion is designated. Note that if the amount of input data is small, this subsystem may be selected to register the initial data in the database.

Next, if the operator wants to display the piping system diagrams shown in Figures 1O and 11 in different colors for each weight loss piping importance rank, in step 31 of Figure 6, the Select your system. this is.

This can be done by specifying the line color-based subsystem number on the initial screen of the thinning pipe management system shown in Figure 7.
When this line color subsystem is selected, the basic menu screen shown in FIG. 7 is displayed. When the operator selects the color-coded display of thinned piping lines, a setting screen for color-coded display (lower right screen in FIG. 7) is displayed. Therefore, the 6th
At step 32 in the figure, the operator specifies the plant name, system name, piping number, piping range, etc. for which output is desired.

Then, the central processing unit determines whether or not the piping number and piping range among these specifications are clear (Step 33). If not, the process proceeds to Step 34, and the central processing unit determines whether the piping number and piping range are clear or not. Output everything in order. If the piping numbers and piping ranges are clear, there is no need to output all the piping system diagrams, so the search items are specified in step 35, and the piping system diagram is output for each search item in step 36.

When the operator selects an item to input, modify, or delete data on the basic menu screen shown in Figure 7, the screen at the bottom left of Figure 7 will be displayed interactively, allowing you to enter, modify, or delete data. I'll come and ask you.

At this point, if you select data input, etc., the screen shown in FIG.

In the examples shown in Figure 9 and Figures 8 and 9, where the screen changes each time an operation is performed, a system diagram from the pool to the end of the tank is displayed. . Piping, valves, etc. installed between the starting point and the ending point.
Displays piping lines displayed in different colors according to the unique number of each pump, etc. (for example, piping number for piping, valve number for valve, pump number for pump) and the importance rank of wall thinning in the piping range. are doing.

To input this piping line, 1. For example, select shapes such as pools, valves, pumps, etc., and draw them on the screen. 1. For example, use the mouse cursor to draw the piping as a line. A display color indicating the importance rank may be specified at the same time as drawing, and the central processing unit combines the thinning factor parameters related to the pipe from the pipe number based on a certain relational expression to determine the importance rank. It is also possible to automatically obtain the piping lines as described later, and when displaying the piping lines, to automatically display the piping lines in preset display colors according to ranks. Data can also be corrected or deleted on this display screen, and when data entry is complete, a number indicating completion is entered.

If the operator wishes to output the thickness reduction importance ranking classification table shown in FIG. 15, he selects the thickness reduction importance classification subsystem in step 41 of FIG. 12. This can be done, for example, by specifying the number of this classification subsystem on the initial screen of the thinning pipe management system shown in Fig. 13. When this subsystem is selected, the basic menu screen shown in Fig. 13 is displayed. be done.

Here, when the operator selects the thickness reduction importance classification table,
At step 42, the weight reduction importance rank classification table shown in FIG. 15 and the explanatory text for each importance rank are output.

In the next step 43, the operator determines whether it is necessary to output a list classified by importance rank. If a list by rank is required, the operator presses the rank designation key "1" in step 44 to designate, for example, the highest importance level ■, and in the next step 45, the operator selects the plant name and system. When the name is input, the rank-based list shown in Figure 16 is output in step 46.0For example, when there are signs of abnormality in the piping, by specifying the important bottom type and specifying the plant name and its system name, When the list shown in FIG. 16 is output, the operator draws up an inspection plan to carry out the actual inspection starting from the oldest piping replacement year in this list.

When the operator selects an item for inputting, modifying, or deleting data on the basic menu screen in Figure 13, the bottom screen in Figure 13 is displayed interactively, asking whether or not to input, modify, or delete data. come and ask. If you select one of the data inputs, etc., the classification table shown in FIG. 15 is output (the initial state of the classification table is shown in FIG. 14). In this state, the operator can input the humidity and temperature.

When the limit values necessary for ranking such as dissolved oxygen concentration and flow rate are input, the central processing unit automatically determines the rank Q to V by taking into account the input thinning factor parameters, enters them in the corresponding columns, and It is output as the state shown in Figure 15. In addition to the thinning factor parameters mentioned above, the rank may also be determined by taking into account the replacement period of the piping, that is, the number of years the pipe has been in use. In addition, if the operator inputs each ranking individually, the rank can be input directly.

Modify or delete.

The ranking shown in FIG. 15 is based on operational experience in nuclear power plants and technical knowledge obtained through experiments, etc., and is based on the types of fluids (for example).

There is a high possibility that thinning will progress under neutral pure water and steam conditions.

), temperature (for example, there is a high possibility that thinning will proceed under conditions of 60°C or higher), dissolved oxygen (for example, there is a high possibility that thinning will proceed under conditions below tsppb), humidity (for example, 1 (There is a high possibility of thinning progressing under conditions of .5% or higher.) and flow velocity (For example, there is a high possibility of thinning progressing under conditions of 3 m/s or higher.) ■ (Thickness thinning possible) (particularly large), ■ (medium possibility of thinning), ■ (medium possibility of thinning)
, ■ (medium possibility of thinning), and ■ (no particular possibility of thinning).

Regarding countermeasures against wall thinning in power generation plants, accurate and prompt responses are required when troubles occur in the plant, and accurate and prompt responses are required to regularly plan pipe wall thinning countermeasures during periodic inspections. Regarding thinning management, related information is managed on iF, and when a problem occurs, it takes about 40 to 50 man-hours (10 days with about 4 to 5 people) to handle it in a relatively short period of time. amount). In addition, about 30 man-hours (approximately 15 days with two people) were spent on the pipe wall thinning countermeasure plan.

According to the embodiment, by computer-managing various information regarding the thinning of pipes in a database, it is possible to respond accurately and quickly when a trouble occurs in a plant, and the number of man-hours can be reduced to about 115 compared to the conventional method.

In addition, it is now possible to provide accurate and quick planning support for periodic pipe wall thinning countermeasure plans during periodic inspections, making it possible to
The number of man-hours can be reduced to about 3.2.Furthermore, improving the overall preventive maintenance of the power plant has a great effect on improving plant reliability.

〔Effect of the invention〕

According to the present invention, it is possible to quickly and accurately manage the thinning of pipes constituting a power generation plant, and it is possible to improve the preventive maintenance of a single power generation plant.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a power plant thinning pipe management device according to an embodiment of the present invention, Fig. 2 is a flowchart showing the processing procedure of the thinning pipe importance ranking subsystem, and Fig. 3 is a thinning pipe. A diagram showing the flow of the display screen of the importance rank subsystem, Figure 4 is an explanatory diagram of the thinning pipe importance rank input/correction/deletion screen, Figure 5 is an explanatory diagram of the thinning pipe importance rank output list, Figure 6 is a flowchart showing the processing procedure of the color-coded subsystem for thinning piping lines, Figure 7 is a diagram showing the flow of the display screen of the color-coded subsystem for thinning piping lines, and Figures 8 and 9 are thinning lines. An explanatory diagram of the piping line input/correction/deletion screen, FIGS. 10 and 11 are explanatory diagrams of the display screen of the thinning piping line system diagram, and FIG. 12 is a flowchart showing the processing procedure of the thinning importance classification subsystem. Figure 13 is a diagram showing the flow of the display screen of the thickness reduction importance classification subsystem, Figure 14 is an explanatory diagram of the display screen showing the initial state of the thickness reduction importance classification table, and Figure 15 is the thickness reduction importance classification table. An explanatory diagram of a display screen. FIG. 16 is an explanatory diagram of the main callisto of the weight reduction pipe importance rank. 1...Central processing unit, 2...Database, 3...
- Auxiliary storage device, 4...CRT, 5...I/O device. Representative Patent Attorney Tadashi Akimoto Actual Figure Figure Figure Figure A Figure Figure Figure Figure Figure Figure Figure Figure Figure

Claims (1)

[Claims] 1. Data regarding various piping constituting a power generation plant include at least the material of the piping, the type of fluid flowing through the piping, the temperature of the fluid, the dissolved oxygen concentration of the fluid, and the a storage device that stores data regarding the wetness of a fluid and a flow rate of the fluid for each pipe; an input device that inputs each of the data; and a device that reads data from the storage device in accordance with instructions input from the input device. A power generation plant wall thinning piping management device comprising: an output device for outputting an output. 2. Data regarding the various piping that constitutes the power generation plant include at least the material of the piping, the type of fluid flowing through the piping, the temperature of the fluid, the dissolved oxygen concentration of the fluid, and the wetness of the fluid; a storage device that stores data regarding the flow rate of the fluid and the importance of wall thinning for each pipe; an input device that inputs each of the data; and a device that reads data from the storage device in accordance with instructions input from the input device. A power generation plant wall thinning piping management device comprising: an output device for outputting an output. 3. Data regarding the various piping that constitutes the power plant include at least the material of the piping, one type of fluid flowing through the piping, the temperature of the fluid, the dissolved oxygen concentration of the fluid, and the wetness of the fluid. , a storage device that stores data regarding the fluid flow velocity, the importance of wall thinning, and a piping system diagram for each pipe; an input device that inputs each of the data; and an input device that inputs the data according to instructions input from the input device. A power generation plant thinning pipe management device comprising: an output device that reads data from a storage device and outputs the data. 4. In claim 2 or 3, at least the material of the piping, the type of fluid flowing through the piping, the temperature of the fluid, the dissolved oxygen concentration of the fluid, and the wetness of the fluid,
A power generation plant thinning pipe management device characterized by comprising means for determining the importance of thinning based on a predetermined relationship from the flow velocity of the fluid. 5. A method for outputting data in the power plant thinning management device according to any one of claims 1 to 4, characterized in that data regarding piping is read from a storage device and output in a table format. Data output method for piping management equipment. 6. A data output method for a power plant thinning pipe management system according to claim 5, characterized in that the data of only the pipes having a specified weight thinning importance level is read out from the storage device and outputted in a table format. 7. In the data output method in the power plant thinning pipe management device according to claim 3 or 4, the specified piping system diagram is read out from the storage device and outputted, and each pipe is color-coded according to the importance of thinning. A data output method for a power generation plant wall thinning piping management device characterized by: 8. A data output device in the power plant thinning pipe management device according to any one of claims 1 to 4, comprising an output control means for reading data regarding the pipes from the storage device and outputting them in a table format. A data output device for a power plant thinning pipe management device, which is characterized by: 9. A data output device for a thinning pipe management system according to claim 8, wherein the output control means reads the data from the storage device only for the pipes having the designated importance of thinning and outputs the data in a table format. 10. The data output device in the power plant thinning pipe management device according to claim 3 or 4, characterized by comprising an output control means for outputting a piping system diagram in which each pipe is color-coded according to the importance of thinning. Data output device for power plant thinning pipe management device. 11. In the data registration method in the power plant thinning pipe management device according to claim 3 or 4, drawing a piping system diagram by moving a cursor on the display screen of the output device according to instructions from the input device; A data registration method for a power generation plant wall thinning piping management device characterized by registering this piping system diagram in a storage device. 12. A data registration method for a power plant thinning piping management device according to any one of claims 1 to 4, characterized in that data regarding the piping is input in a table format and registered in a storage device. How to register data for meat piping management device.