JPS62126406A - Method and apparatus for backing up maintenance and control of plant - Google Patents

Abstract

PURPOSE:To back up effectively the maintenance and control of a plant by controlling information relating to the maintenance and control of the plant and deciding whether repairing work such as inspection and repair can be simultaneously performed or not without interference with other repairing work. CONSTITUTION:Prior to the start of work, data for the contents of the work and data indicating the state of the plant are inputted from an input device 1. Data indicating the contents of the work in advancing and the work to be performed, the data for the contents of reference work, data for the connecting information of systems and instruments in the plant, data for influence information, display screen data, and a program required for processing are stored in a storage device 2. A connecting state deciding part 5 decides whether the work to be started is connected to objective instruments for the work in advancing and to be performed or not. An interference existence deciding part 6 decides the existence of interference between respective works. A display data editing part 7 edits display data and outputs the edited data to a display device 3. A storage part 8 stores plant state data inputted from the plant 9.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a plant maintenance management support method and device,
In particular, the present invention relates to a plant maintenance management support method and apparatus that are suitable for supporting judgments on whether maintenance work such as inspection and repair can be performed simultaneously without interfering with other maintenance work.

[Prior art]

In order to operate and manage plants such as chemical plants and power plants, in addition to normal operation, it is necessary to
Equipment inspections, repairs, tests, etc. need to be carried out systematically and efficiently.

Large-scale plants, including nuclear power plants,
The structure is complex and includes a large number of devices per system, so the types and contents of maintenance work are diverse, and many tasks are often performed in parallel in many systems and locations within the plant.

In particular, nuclear power plants have strict safety mechanisms in place to ensure absolute safety, as well as strict maintenance management standards, so in reality, serious accidents that would lead to the shutdown of the reactor are extremely unlikely to occur. Rare. Meanwhile, equipment inspection and repair.

The amount of maintenance work such as testing is enormous and the work frequency is high.

In order to carry out multiple maintenance tasks simultaneously, it is necessary to thoroughly check in advance whether or not these tasks will have a negative impact on each other, or in other words, whether or not they will interfere with each other.

This means that operations associated with individual tasks (for example, turning on power, opening/closing valves, etc.) are not compatible with the setting conditions for other tasks (for example, turning off equipment and working in a stopped state, or closing valves in piping). , to work separately from other systems;
etc.), it is necessary to investigate in detail whether there is any violation.

[Problem that the invention seeks to solve]

When multiple maintenance operations are carried out at the same time (starting.

When attempting to perform maintenance on a specific location (even if they are not completed at the same time but overlap in time), it is first necessary to determine which systems and equipment in the plant will be affected by the operations associated with the maintenance work. Must be.

As a technology to meet these demands, Japanese Patent Application Laid-Open No. 58-17
No. 2701 is publicly known.

In the above-mentioned known technology (plant operation guidance method), a method is used to describe the spread of events due to abnormalities, accidents, etc. using a cause-and-effect tree (CCT). This method is
For pre-specified events, all routes and order of event spread are constructed in advance. but,
In the case of maintenance work, since the target equipment and system 1 work contents are wide-ranging, it is almost impossible to describe in advance the ripple effects of operations.

In general, senior operators such as shift supervisors and shift supervisors will analyze the operating status of the plant's 9 equipment, 2 work details, 1 work time period, etc.
The presence or absence of interference between operations is determined, and work permission is granted if there is no interference. However, this requires the management of a large amount of information and the content of the judgment is complex, so it is often difficult to make accurate judgments. Furthermore, the effort required to manage documents related to a large number of tasks is large, and the content of handover between shifts becomes complex. For this reason, even if automation of plant operations progresses and labor savings are realized in normal operations,
It is also expected that this will not lead to a reduction in the number of operators.

The present invention has been made in view of the above problems, and its purpose is to manage information related to plant maintenance management, and to prevent maintenance work such as inspection and repair from interfering with other maintenance work. It is an object of the present invention to provide a method and apparatus for effectively supporting plant maintenance management by determining whether or not they can be carried out at the same time.

[Means for Solving the Problems] As described above, the present invention manages information necessary for plant maintenance management, determines whether there is interference between maintenance operations, and displays the results.

In the present invention, the configuration of system 2 equipment necessary for plant maintenance management, contents of maintenance work, influence data of operations, etc. are stored and managed in computer memory, and these data and plant status data are used to Determine whether there is any interference between maintenance operations.

In determining the presence or absence of interference, we check whether the equipment targeted by each work is connected to each other based on the physical connection relationship of the system 9 equipment and the status data of the system 9 equipment in the actual plant. If the target device is in a connected state, the presence or absence of interference between tasks is determined based on whether the effect of operating the device spreads to other devices through the connection route and violates the setting conditions of the two tasks. do.

In order to achieve the above object based on the above-mentioned principle, the plant maintenance management support method according to the present invention is applicable when a specific location in a plant having a large number of devices and configured to form a plurality of systems is to be maintained. , prior to maintenance of the area concerned,
Based on (a) data representing the connection relationship between the equipment and system of the plant, and (b) data representing the current state of the equipment and system, the equipment at the said location and other equipment undergoing maintenance work are determined. Determine whether or not there is a connection relationship, and if there is a connection state, use impact data of operations associated with maintenance of the location and influence ripple data to determine whether the impact of the maintenance operation on the location is on other maintenance work. The present invention is characterized in that it is determined whether the maintenance work interferes with other maintenance work by determining whether or not the work conditions are disturbed.

In addition, the device of the present invention created to facilitate the implementation of the above-mentioned method of the invention has (a) a memory for storing data representing the connection relationships between each device and system, as well as influence data and influence ripple data of operations associated with maintenance work; (b) an input device for inputting data representing the status of equipment and systems of the plant; and (c) an input device for inputting maintenance work content data and status data of each equipment and system. and (d) a computer processing device, and (e) a display device, and (d) above.
When performing maintenance on a specific location, the computer processing device performs the above-mentioned operations based on (a) data representing the connection relationship between the equipment and system of the plant, and (b) data representing the current state of the equipment and system. Determine whether or not there is a connection relationship between the equipment at the location and other equipment undergoing maintenance work, and if they are in a connected state, use impact data and impact ripple data of operations associated with maintenance at the location. Determine whether the effect of the maintenance operation at the relevant location disturbs the working conditions of other maintenance work, determine whether the maintenance work in question interferes with other maintenance work, and use the results as described in (2) above. e) Configure to display on a display device.

[Effect]

According to the method of the present invention described above, information necessary for plant maintenance management can be stored and managed in computer memory, and maintenance work such as equipment inspection and maintenance can be performed simultaneously without interfering with other maintenance work. Since it can be determined whether or not there is, plant maintenance management can be effectively supported. Therefore, it is possible to prevent troubles from occurring due to mutual interference in one operation, and it is also possible to reduce the burden on the plant operator.

Moreover, according to the apparatus of the present invention, the above-described method of the invention can be carried out easily and reliably, and its effects can be fully exhibited.

〔Example〕

FIG. 1 is a system diagram showing an embodiment of an apparatus of the present invention configured to carry out the method of the present invention.

In FIG. 1, 1 is an input device, 2 is a storage device, 3 is a display device, 4 is a storage section, 5 is a connection state determination section, 6 is an interference presence/absence determination section, 7 is a display data editing section, and 8 is a storage section. , 9 is a plant, and 10 is a computer processing device.

Maintenance work will now be carried out on specific locations. In this case, prior to starting the work, data on the content of the work and data representing the state of the plant are input from the input device 1.

The storage device 2 stores content data of work already in progress and work scheduled to be performed, &I quasi-work content data, connection information data of system 1 equipment in the plant, impact ripple information data,
It stores display screen data and programs necessary for processing. The connection state determination unit 5 determines whether or not the work that the worker is currently trying to do (referred to as the relevant work) is connected to the target equipment of the work that is already in progress or that is scheduled to be performed. Determine whether there is interference between tasks. The display data editing section 7 edits the display data and outputs it to the display device 3. The storage unit 8 stores plant status data taken in from the plant 9.

Hereinafter, a specific example of work interference will be shown, and then a procedure for determining the presence or absence of work interference and outputting the result using the method and apparatus of the present invention will be shown.

Figures 2 and 3 show drive hydraulic system diagrams of the control rod drive mechanism (CRD) of a boiling water reactor (BWR). Driving water is supplied from the condensate storage tank, flows through the suction filter 21, driving water pump 22, driving water heater 2:3, etc. in the direction of the arrow in the figure, and is supplied to the control rod drive mechanism to drive the control rods. do.

As shown in FIG. 2, the CRD drive hydraulic system is divided into two systems, A (upper stage) and B (lower stage).

Normally, the B system is stopped due to valve closure, pump stop, etc., and the A system is stopped.
Operate using only the grid. In Figures 2 and 3,
The open/closed status of the valve during constant output operation is displayed in white (open) and black (closed).

A part of the driving water is taken out at the outlet of the driving water filter 24 and is supplied to the re-ring system (PLR) in FIG. 4 from ◯ in the figure. This water is used as seal water for the recirculation pump.

Now, the A-system suction filter 2 in FIG.
Let's take the task of exchanging 1 as an example. It is assumed that the reactor is in constant power operation. The procedure for replacing the suction filter 21 is as follows.

(1) Open the inlet valve 27 and outlet valve 28 of the suction filter B from closed.

(2) Opening and closing the inlet valve 25 and outlet valve 26 of the suction filter A.

(3) Replace suction filter A.

(4) Open the inlet valve 25 and outlet valve 26 of the suction filter A from closed.

(5) Opening and closing the inlet valve 27 and outlet valve 28 of the suction filter B.

If this filter replacement work is to be done by a junior high school student, that is, if no other work is being done,
Just replace the filter according to (5).

No problem.

However, when attempting to perform this filter replacement work, if the recirculation pump seal water flowmeter inspection work described below with reference to Fig. 4 is being performed, the above-mentioned filter replacement work is Interfering with inspection work.

FIG. 4 is a schematic diagram of the recirculation system. Cooling water for the nuclear reactor 41 is forcibly circulated using a recirculation pump 42. 4
6 is a pump motor. As described above, the recirculation pump seal water is taken out from the CRD drive hydraulic system, flows into the recirculation system from ■ in FIG. 4, and is supplied to the recirculation pump seal section 44 in the containment vessel (PCV) 43. . A flow meter 45 is attached to the seal water piping. Suppose that one inspection operation is being performed because the indication of the flow meter 45 has changed for some reason. In this case, during inspection work,
As a working setting condition, the flow rate of seal water must be kept constant. Otherwise, even if the flow meter reading fluctuates, it will not be possible to determine whether it is due to a malfunction of the flow meter or actual flow rate fluctuations.

If, during the inspection work of the flowmeter 45, the CRD
When replacing the system's suction filter, temporary fluctuations occur in the CRD drive water flow rate due to the opening and closing operations of the filter's inlet and outlet valves.

This variation results in a variation in the flow rate of the recirculation pump seal water and therefore in the reading of the flow meter 45.

In other words, the replacement of the CHD suction filter interferes with the inspection of the recirculation pump seal water flow meter. In the present invention, interfering means disturbing the working conditions.

In the above example, the content of the interference is relatively simple.

This is an example in which it is easy to conclude that the two tasks are unrelated because the two tasks involve equipment in different systems and the installation locations of the devices are far apart. Figure 5 shows a cross-sectional view of the reactor building. The CRD drive hydraulic system is installed at location 51. The recirculation pump is also located at location 52 within containment vessel 43, and the two are far apart.

Next, using the method and apparatus of the present invention, the above two
This section describes the procedure for determining that two tasks interfere and outputting the results.

FIG. 6 shows the overall flow of processing performed by the method and apparatus of the present invention. The input is each data shown in Table 1 below.

Table 1 Among the input data shown in Table 1, Nα2. Illα3°Nn4. Nα5. Nα7 is the storage device 2 shown in FIG.
FIG. 7 is an internal configuration diagram of the storage device 2, in which 71 is a memory for storing data of ongoing/scheduled work, 72 is a memory for storing standard work content data, and 73 is a memory for storing data of standard work contents. A connection information data storage memory, 74 an influence ripple information data storage memory, 75 a display screen data storage memory, and 76 a processing program storage memory.

Next, the contents of the processing will be shown along FIG. 6.

First, the content of the work is inputted from the input device 1.

The work details include the work name, target system name, and target device name.

These include 9 work hours, 9 work conditions, and 9 work procedures. The details will be described later. If the work is a regular test, etc., the work content is predetermined, so the content data can be stored in the memory 72 in Fig. 7 as a standard work, and then recalled and used. Specify the time zone each time).

After inputting the work details, the display screen is then edited to display the work content data and the work system diagram. FIG. 8 shows the flow of screen display.

FIG. 9 is an example of a display screen. In FIG. 9, 91 is a maintenance work content display section, and 92 is a system diagram display section.

93 is a related work display section, 94 is a work availability determination result display section, and 95 is a display device screen. CRT as a display device
, a large screen or the like is used, but documents may also be displayed using a printer or the like. The frames and headings of each display section in FIG. 9 are fixed screens, and those prepared in advance and stored in the memory 75 in FIG. 7 are displayed as they are. The display section 91 displays the previously input work content data.

In addition, a system diagram of the work is displayed on the display unit 92, which is displayed by specifying necessary screens from the input device 1 among screens prepared in advance. The screen data of the system diagram is organized into a hierarchical structure as shown in Figures 10 and 11.
It is stored in the memory 75 shown in the figure. FIG. 10 shows the screen numbers and detailed structure data locations of the entire plant and main systems in frame format. Taking the control rod drive system as an example, the screen for the entire system is shown in FIG-6.
The detailed structure indicates that the frame is stored in a frame named CHD-1. Figure 11 shows the frame CHD-
It is 1. This frame shows the screen numbers of each part of the control rod drive system divided into several parts.

Indicates the name of the frame that stores the detailed structure of each part. A system diagram is shown on the display section 92 in FIG. 9, assuming that the screen FIG-61 of the suction filter section in FIG. 11 is designated. That is, in the example of FIG. 9, the area around the suction filter 21 shown in FIG. 2 is displayed on the system diagram display section 92.

The meanings of the branch point y1 and the confluence point yz shown in FIG. 9 will be described later. Note that, at this point, the related work display section 93 and work availability determination result display section 94 in FIG. 9 are left blank, and are additionally displayed after the following processing is executed.

When the display of the basic screen is finished, the content data of the work in progress and the work scheduled to be performed, and the connection information data are imported from the storage device 2.

To determine whether the work in question interferes with other work, first check whether the time zones overlap.

Interference determination is not necessary for tasks that do not occur in overlapping time periods.

Next, it is determined whether the target equipment for the relevant work and other work in progress or scheduled to be performed are connected to each other, and if they are connected, the influence of the operation accompanying the work will be affected by the work conditions of the other work. It is determined whether the operations interfere with each other, that is, whether the operations interfere with each other, and the determination result is additionally displayed on the result display section 94 of the screen shown in FIG. A method for determining the connection status and a method for determining whether there is interference will be described later. By repeating this process for all tasks in progress and scheduled to be performed, it is possible to determine whether the task in question can be performed without interfering with other tasks.
The CHD suction filter replacement work mentioned earlier,
The case of inspection work of recirculation pump seal water flow meter will be explained.

In the following explanation, the 12th
As shown in the figure and FIG. 13, device names such as V-1 and F-1 are given. In addition, VL+ is added to the driving water branch point 1 confluence point.
'/Z etc.

In FIG. 12, the recirculation system flow meter 45 and recirculation pump seal section 44 are also shown with names R-1 and R-2.

FIG. 14 shows the flow of connection status determination. Each processing block in the figure is cited with a number such as ■, ■, etc. on the left shoulder.

First, in (2), the start point and end point of connection relationship determination are set. The starting point and ending point are the equipment operated during each work or the equipment to be inspected. The work content data is expressed as in the 15th @. FIG. 15 is a graphical representation of the contents of the CRD suction filter replacement work. As shown in step (1) of FIG. 15, the first operation is to open V-3.

In this case, V-3 is the starting point. Regarding the recirculation system pump seal water flow meter inspection work, the work content is similarly expressed in a frame. The target device for this work is a flowmeter, and R-1 in FIG. 12 is the end point Y.

Below, follow the device and system connection list to start point X and end point Y.
Determine the connection status of. The connection list is as shown in Figure 16, branch 1 junction 3/1ty! etc. and equipment V-1.
The 16th F-1 etc. is represented by a string of symbols enclosed in parentheses.
The figure is a frame showing the configuration of the CHD drive hydraulic system, including external inputs and external outputs.

It shows information about the system, such as the type of equipment in the system, connection relationships, etc., and the connection information data storage memory 73 (7th
(Figure).

Figure 17 shows how to express the connection relationships between devices and systems. 1st
FIG. 7 shows how to express a connection list by dividing the connection relationships into series, one branch, two confluences, and a loop. The connection relationships between devices and systems can all be expressed using the above four types.

However, when the branch 9 confluence represents only the physical connection of 0 devices, which is a relationship that includes the direction of flow of fluids, electrical signals, etc.

Both may be treated as a branch. Also, the 17th
In the example shown in the figure, it is assumed that the branch point 9 confluence point is located outside the equipment (piping, wiring, etc.), but depending on the target device, the device itself may be the branch 1 confluence point (for example, a 3-way valve, a 2-way valve, etc.). There are also controllers with one human output, etc.).

Hereinafter, the case of the downstream side of the outermost loop in FIG. 14 will be described as an example.

14, an initial list Qo for connection relationship determination is created. In addition, in ■, the starting point
Check if and Y are connected 6 below, 18th
The specific contents of the processing of (1) and (2) will be shown using the diagram and FIG. 20.

In FIG. 18, first, the connection list Qo including the starting point X is selected using 9. In this case, the starting point is V-3, and the connection list including this is shown in Figure 16 (yIV
-3F-2V-4yz).

In process O, elements on the upstream side of the starting point V-3 are deleted.

As a result, the connection list becomes (v-3F-2V-4yz).

In process 0, the status data of the devices included in the above list is taken in. The device status is information such as valve opening/closing, pump operation, stop, etc., and is used to determine whether or not the flow of fluid and signals is interrupted by the device. In the following explanation, devices that cut off the flow of fluid and signals, such as closed valves and stopped pumps, are called stopped devices. 0 device status is imported from the plant data acquisition device, but devices that do not have measuring instruments installed , or for devices whose measuring instrument signals are not input into the computer, input them manually using the input device 1 shown in FIG. Valve closure, pump stop, etc. can be determined not only directly from measured data, but also indirectly from other measured data. An example of indirect determination will be explained using FIG. 19. In FIG. 19, 191, 192, and 193 indicate valves. Although the open/closed state of the response cannot be directly detected, flowmeters 194, 195, and 196 are installed at the positions shown in the figure, and fluid flow is observed with flowmeters 194 and 196, but not with flowmeter 195. Suppose that In this case, the fluid flows in the direction of the arrow shown by the broken line in the figure or in the opposite direction, and it can be confirmed that the valve 192 is closed. This is because if valve 192 is open, fluid flow must be observed at flow meter 195.

In process O, it is determined whether the stretch Qo includes the end point Y or not. In this case, the list QO does not include the end point, so the process moves to O.

If list no includes the end point Y, determine whether there is a stopped device between the start point or the end point Y based on 0,
By using 0, elements downstream of Y are deleted and the connection determination is completed. At this time, the first element of the list becomes the starting point, and the last element becomes the ending point.

That is, if there is no stopped device, the conclusion is that X and Y are connected. In the opposite case, we conclude that X and Y are not connected.

In process O, it is similarly determined whether there is any stopped equipment.

In this case, since V-3, which is the starting point, is the device that will be operated from now on, it is excluded from the judgment, but in addition to this, V-4 is closed and is a stopped device, so the process is Figure 3
As shown in Figure 1, jump to ■ in Figure 14.

In process ■, the judgment for the first operation has been completed, so
Move on to the second operation and return to process (■).

The second operation is V-4 open as shown in step (2) of FIG. In this case, processing up to 0 is
This is similar to the case of the first operation.

The list selected in "Processing axis" is the same as in the case of the first Kurosaku (7) (yz V-3F 2 V-4yz), but it becomes (V-4yz) at the stage of processing [phase]. . As a result, in the judgment of [phase], the list is the starting point of V-4.
Since no other stopped equipment is included, the 1 determination result is NO.

The process now moves to step 4 in FIG. 4, use the list obtained above (V-14, Jy z) as the initial list,
[Stocks] Perform the following processing. The contents of process (2) are shown in FIG. The processing contents are almost the same as in the case of Fig. 18, so
Table 2 below shows only the outputs of the processing blocks G to O.

Table 2 As a result of the processing shown in Table 2, the list (v-4yz V
-5P-I V-6ya) It can be seen that valve V-4 is connected to the confluence/branch point y3 in FIG. 12.

The process now returns to FIG. 14.

In process (2), since the above list remains, the determination result is Yes, and the process returns to process (2).

If the same procedure is repeated thereafter, it can be confirmed that the valve V-3 is connected to the end point R-1 via the confluence/branch point y4 in FIG. 12, and the connection determination process is completed. The final list obtained is (V-4yzV-5...omitted...y4 R1
).

In the above example, the determination process is completed with the 2nd operation, but the same process as above is performed on the upstream and downstream sides (processing [shi)] for all the target devices of the operation included in the maintenance work (processing @). By repeating this, it is possible to determine the connection state between the devices to be repaired. If you follow the connection route sequentially, one of the following conditions will always apply.

(1)' Connected (target point reached).

(2)' Reach the open end (no destination).

(3)' Leads to stopped equipment (same as above).

(4)' Return to the same location (loop).

In the case of (4)', processing to prevent an infinite loop is required. In this embodiment, an infinite loop is prevented by the process ◎ shown in FIG.

This completes the connection status determination. Next, returning to the flow shown in FIG. 6, a method for determining the presence or absence of interference will be described.

FIG. 21 shows the flow of determining the presence or absence of interference. In the flow of FIG. 21, first, by process 0, (direct) influence data of the operation is selected. In this case, the starting point X is valve V-4, and the influence of this V-4 opening operation is as shown in FIG.
They are (flow rate y1 fluctuation) and (flow rate y2 fluctuation).

In this embodiment, the influence of the operation is described as the influence on the branch/merging point closest to the operated device.

Next, in process 0, setting conditions for the work related to the end point Y are selected. In this case, Y is the recirculation pump seal water flow meter R
-1, and the working condition is that the flow rate of seal water is constant. Here, this setting condition is expressed as a prohibition condition, that is, a negative proposition, as follows at the branch junction y4, which is the closest to R-1.

(Prohibition (flow rate y4 variation)) The above conditions are stored in the memory 71 in FIG. 7 as content data for inspection work of the seal water flowmeter.

In the process@, the influence ripple information data is stored in the memory 74 in FIG.
Import from. The contents of the impact ripple data will be described later.

The meaning of the branch of process O is as follows. In other words, if there is no branch or confluence point in the connection list, the influence of work A,
Since the conditions of work B are both expressed by the same branching and merging points, there is no need to follow the connection route to have the influence spread, and direct comparisons can be made. Furthermore, if there is only one branching/merging point, the influence of work A and the conditions of work B can be directly compared at that branching/merging point.

In the process [phase], select four branching/merging points. In this case,
yz is selected as Zl, and y4 is selected as Z2.

In process 0, the above connection of 'IL+14 is expressed as the following proposition.

(Connection yz number y) Process ◎ spreads the influence of work A based on the influence ripple data and expresses the result as a proposition.The method will be explained using FIG. 22.

FIG. 22 shows the above processing @, 0. Using the result of @,
The process by which the influence of work A spreads is shown. As shown in the figure, impact ripple data shows the relationship between cause and effect.
It is expressed as an f-then format rule. The meaning of the rules shown in FIG. 22 is as follows.

“If an influence $Z occurs on the flow rate at location $X, and location $
If X is connected to location $Y, $Z will affect the flow rate at location $Y.'' $X, $Z, etc. with the symbol $ can be any string of characters. By comparing the proposition on the left side of Fig. 22 with the rule pattern in the center, the influence ripple result is (flow * y4 fluctuation).

Return to FIG. 21 and execute process ◎. As mentioned above, the setting conditions for work B are as follows.

(Prohibition (flow rate y4 fluctuation)) Comparing this prohibition condition with the influence ripple results obtained above, we can see that the influence of work A matches the prohibition condition of work B, that is, work A is It can be concluded that the

With the above steps, it was possible to determine the presence or absence of interference. Returning to the flow shown in FIG. 6, the next process is to additionally display the determination results. That is,
The purpose is to display the related work and the work availability determination result on the display sections 93 and 94 in FIG. In this case, the related work is checking the flow meter of the recirculation pump seal water, so the name of this work and the time period are displayed on the 1 display section 93. Further, the display unit 94 displays whether or not the CRD suction filter can be replaced together with the reason for the determination. 23 and 24 show the display contents of the display sections 93 and 94.

The display contents shown in FIGS. 23 and 24 are all obtained through the process described above. In addition, y in Figure 24
4 can be confirmed by switching the screen of the display section 92 in FIG. 9 to the recirculation system.

The contents of Fig. 23 and Fig. 24 are additionally displayed on the display screen of Fig. 9, so the operator can grasp at a glance whether or not the relevant work can be carried out from this screen along with the work details, system diagram, etc. can.

In addition, in the above-mentioned embodiment, a combination of automatic and manual methods were assumed to be used as input methods for plant equipment status data, but if the instrumentation system and computer processing equipment can be advanced and all equipment status can be imported into the computer, The device of the present invention can be configured to determine whether or not a task is possible and display the results by simply inputting work content data or specifying a task name stored in a storage device in advance.

〔Effect of the invention〕

As described above, according to the present invention, information necessary for plant maintenance management can be stored and managed in computer memory, and maintenance work such as equipment inspection and repair can be performed simultaneously without interfering with other maintenance work. Since it can be determined whether the Therefore, it is possible to prevent troubles from occurring due to mutual interference between operations, and the burden on the plant operator can be reduced.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of the device of the present invention;
Figures 2 and 3 are drive hydraulic system diagrams of the control rod drive mechanism in boiling water reactors, Figure 4 is a schematic diagram of the recirculation system, Figure 5 is a sectional view of the reactor building, and Figure 6 is A flowchart showing the entire process related to the method of the present invention, FIG. 7 is an internal configuration diagram of the storage device, FIG. 8 is a flowchart of screen display, FIG. 9 is a pattern diagram of the display screen, and FIGS. 10 and 11 are An explanatory diagram showing the structure of display screen data, 12th [511 and 13 are explanatory diagrams showing the names of devices, Fig. 14 is a flowchart for determining the connection status, and Fig. 15 is an explanatory diagram showing the structure of work content data. , Fig. 16 is an explanatory diagram showing the system configuration, Fig. 17 is an explanatory diagram showing the method of expressing connection relationships, and Fig. 1
Figure 8 is a flowchart showing part of the connection status determination process;
FIG. 19 is an explanatory diagram showing an example of the equipment stoppage determination method;
21 is a flowchart showing a part of the connection status determination process, FIG. 21 is a flowchart for determining the presence or absence of interference, FIG. 22 is an explanatory diagram of the layer spread situation, and FIGS. 23, 21 and 24 are partial views of the display screen. 21... Suction filter, 22... Drive water pump, 23... Drive water heater, 24 River drive water filter. 25... Inlet valve, 26... Outlet valve, 27... Inlet valve, 28... Outlet valve.

Claims (1)

[Claims] 1. When maintaining a specific location in a plant that has a large number of equipment and is configured to form multiple systems, prior to maintenance of the location, (a) the equipment of the plant; , whether or not there is a connection relationship between the equipment at the location and other equipment undergoing maintenance work, based on data representing the connection relationship of the system, and (b) data representing the current status of the equipment and system described above. and, if the area is connected, use the impact data and impact ripple data of operations associated with the maintenance of the area to determine whether the influence of the maintenance operation of the area will disturb the working conditions of other maintenance work. 1. A plant maintenance management support device that determines whether or not the maintenance work interferes with other maintenance work. 2. In a plant that has a large number of devices and is configured to form multiple systems, (a) memory for data representing the connection relationships between each device and system, as well as data on the impact of operations and impact ripple data associated with maintenance work; (b) a storage device for storing information in the storage device;
(c) an input device for inputting maintenance work content data and status data of each device and system; (d) a computer processing device; (e) a display device; and (d) above.
When performing maintenance on a specific location, the computer processing device of , Determine whether or not there is a connection relationship between the equipment at the said location and another equipment undergoing maintenance work, and if they are in a connected state, determine the impact data and impact ripple data of the operation associated with the maintenance at the location. is used to determine whether the effect of maintenance operations at the location disturbs the working conditions of other maintenance operations, determines whether the maintenance operations in question will interfere with other maintenance operations, and reports the results as described above. A plant maintenance management support device, characterized in that it is configured to be displayed on the display device of (e).