JP2021189728A - Evaluation object extracting method, extracting apparatus, and program - Google Patents

Abstract

To provide a method of extracting an object range of reliability evaluation from CAD data.SOLUTION: An evaluation object extracting method includes the steps of: creating a network diagram formed of edges and nodes from configuration data of a systematic diagram of an evaluation object; setting analysis conditions for the network diagram; extracting the edges included in an object range of reliability evaluation based on the analysis conditions; extracting the nodes connected to the extracted edges; and creating a simplified systematic diagram including the extracted edges and nodes and displaying a configuration required for the reliability evaluation by extracting it from a configuration of the systematic diagram.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to extraction methods, extraction devices and programs to be evaluated.

A Probabilistic Risk Assessment (PRA) model (hereinafter referred to as PRA model) is used for risk assessment of a nuclear power plant. In order to create a PRA model without omission, the target range of risk assessment is comprehensively extracted from the plant system diagram, the failure modes of the equipment included in the extracted range are examined, and the ET diagram (event tree). And create an FT diagram (fault tree).
As a related technique, Patent Document 1 discloses a technique for extracting related information from three-dimensional CAD data of a nuclear power plant or the like and creating an FT diagram by giving information on a specific top event and an evaluation target. Has been done. Patent Document 1 does not disclose a technique for extracting the scope of evaluation.

Japanese Unexamined Patent Publication No. 2003-149377

At present, the work of extracting the target range of risk assessment from the system diagram of the plant is performed manually, and a great deal of labor and time are spent on this work. There is a need for a method for efficiently performing the work of identifying and extracting the target range of evaluation that has a significant effect on the function of the system from the system diagram.

The present disclosure provides an extraction method, an extraction device, and a program for evaluation targets that can solve the above problems.

The method for extracting the evaluation target of the present disclosure includes a step of creating a network diagram composed of edges and nodes from the configuration data of the system diagram of the evaluation target, a step of setting analysis conditions for the network diagram, and the above-mentioned. Based on the analysis conditions, the step of extracting the edge included in the target range of the reliability evaluation, the step of extracting the node connected to the extracted edge, and the extracted edge and the node are included. It has a step of extracting a configuration necessary for the reliability evaluation from the configuration of the system diagram and creating a simplified system diagram showing the configuration.

Further, the extraction device of the present disclosure acquires the setting of the analysis condition for the network diagram creation unit for creating the network diagram composed of edges and nodes and the network diagram from the configuration data of the system diagram of the evaluation target. It includes an analysis condition setting unit, an extraction unit that extracts the edge included in the target range of reliability evaluation and the node connected to the edge based on the analysis condition, and the extracted edge and the node. It is provided with a simplified system diagram creating unit for creating a simplified system diagram showing the configurations necessary for the reliability evaluation extracted from the configurations of the system diagram.

In addition, the program of the present disclosure includes a step of creating a network diagram composed of edges and nodes from the configuration data of the system diagram of the evaluation target on a computer, and a step of setting analysis conditions for the network diagram. Based on the analysis conditions, the step of extracting the edge included in the target range of the reliability evaluation, the step of extracting the node connected to the extracted edge, the extracted edge and the node are included. The step of creating a simplified system diagram showing the configuration necessary for the reliability evaluation extracted from the configuration of the system diagram is executed.

According to the above-mentioned extraction method, extraction device and program of the evaluation target, it is possible to extract the evaluation target range which may have a significant influence on the system function on the PRA from the system diagram.

It is a functional block diagram which shows an example of the extraction apparatus which concerns on embodiment. It is a figure which shows an example of the system diagram based on the CAD data which concerns on embodiment. FIG. 1 is a diagram showing an example of CAD data of a system diagram according to an embodiment. FIG. 2 is a diagram showing an example of CAD data of a system diagram according to an embodiment. It is a figure which shows an example of the edge list which concerns on embodiment. It is a figure which shows an example of the node list which concerns on embodiment. It is a figure which shows an example of the network diagram which concerns on embodiment. It is a figure which shows an example of analysis condition 1 which concerns on embodiment. It is a figure which shows the extraction result of the evaluation target range based on analysis condition 1. FIG. It is a figure which shows an example of analysis condition 2 which concerns on embodiment. It is a figure which shows the extraction result of the evaluation target range based on analysis condition 2. It is a figure which shows an example of the simplified system diagram based on analysis condition 1. FIG. It is a figure which shows an example of the simplified system diagram based on analysis condition 2. It is a figure which shows an example of the basic event list based on analysis condition 1. It is a figure which shows an example of the basic event list based on analysis condition 2. It is a flowchart which shows an example of the extraction process of the evaluation target range which concerns on embodiment. It is a figure which shows an example of the hardware composition of the control device which concerns on embodiment.

<Embodiment>
Hereinafter, the method for extracting the evaluation target range of the present disclosure will be described with reference to FIGS. 1 to 9.
(System configuration)
FIG. 1 is a functional block diagram showing an example of an extraction device according to an embodiment.
The extraction device 10 converts the system diagram of the evaluation target object such as a nuclear power plant into a network diagram, and automatically extracts the evaluation target range from the entire system diagram based on the analysis conditions set for the network diagram. do. The evaluation is a reliability evaluation such as PRA. The information of the target range of evaluation extracted by using the extraction device 10 can be useful for, for example, creating a PRA model.

The extraction device 10 extracts a CAD data acquisition unit 11 that acquires CAD data, a network diagram creation unit 12 that creates and draws a network diagram, an analysis condition setting unit 13 that accepts analysis condition settings, and an evaluation target range. Extraction unit 14 to create a simplified system diagram that extracts and shows only the configuration required for reliability evaluation, and the failure mode specified for the equipment in the evaluation target range and the specified failure. A basic event list creation unit 16 that creates a basic event list indicating a mode, an output unit 17 that outputs a network diagram, a simplified system diagram, a basic event list, etc. as a display device or an electronic file, and an output unit required for output processing from CAD data. A storage unit 18 for storing data is provided.

(CAD data)
The CAD data acquisition unit 11 acquires CAD data of the system diagram of the evaluation target. Here, reference is made to FIGS. 2A to 2C. 2A to 2C show CAD data of a system diagram (part) of a certain plant α. In the system diagram of FIG. 2A, for example, the valve VLV-013B connects the pipe RCS-011B and the pipe 050B. Further, in addition to the valve VLV-013B, the valve VLV-012B and the pipe 653B are connected to the pipe 050B. Generally, the CAD data for displaying the plant system diagram includes the piping configuration data exemplified in FIG. 2B and the piping connection data exemplified in FIG. 2C, and the system diagram exemplified in FIG. 2A is output based on these data. To. Alternatively, it is possible to create the pipe configuration data of FIG. 2B and the pipe connection data of FIG. 2C based on the system diagram of FIG. 2A.

As illustrated in FIG. 2B, information such as equipment such as a valve connected to the pipe and branch information are set in the pipe configuration data for each pipe. As described with reference to FIG. 2A, for example, the valve VLV-013B, the valve VLV-012B, and the pipe 653B (branch) are connected to the pipe 050B. This configuration is set in the 1st to 4th lines in the piping configuration data of FIG. 2B. That is, for the pipe 050B, the valves VLV-012B, TEE2501-653B (branch to the pipe 653), the TYPE (equipment type) of the valve VLV-013B, the merging / branching classification, the size (pipe diameter), and the XY coordinate information. Etc. are set. The XY coordinate information indicates the coordinate position in the system diagram of FIG. 2A. Further, the components of the piping configuration data are displayed from top to bottom according to the flow direction of the fluid.

Connection information between pipes is set in the pipe connection data of FIG. 2C. For example, the pipe 050B is connected to the pipe 040B-3, the pipe 653B, and the pipe RCS-011B. In order to define this connection information, pipe 050B is set in the line number column, pipe 040B-3 is set in the FROM column, pipe 653B and pipe RCS-011B are set in the TO column (the third row in the left column of the table).
The CAD data acquisition unit 11 acquires CAD data related to the system diagram, that is, piping configuration data (FIG. 2B) and piping connection data (FIG. 2C).

(Creating a network diagram)
The network diagram creation unit 12 creates a network diagram based on the CAD data (pipe configuration data and pipe connection data) of the system diagram. First, the network diagram creation unit 12 creates an edge list exemplified in FIG. 3A and a node list exemplified in FIG. 3B.
The network diagram creation unit 12 creates an edge list based on the pipe configuration data and the pipe connection data. (A) The network diagram creation unit 12 divides the pipe into one or a plurality of nodes based on the pipe configuration data. For example, when there are a total of three or more devices and branches or merges in one pipe, the network diagram creating unit 12 divides the pipe into devices and branches or merges. Each of the divided piping portions is one edge. Each of the equipment and the branch or merge is a node. For example, since there are three devices and branches on the pipe 050B, the pipe is divided into two nodes, the pipe 050B-1 and the pipe 050B-2. (B) The network diagram creation unit 12 refers to the pipe connection data and confirms the connection between the pipes. (C) The network diagram creation unit 12 refers to the piping configuration data and confirms the node of the connection point of the edge. The network diagram creating unit 12 repeats the processes (a) to (c), and sets the pipe diameter of one edge and the nodes connected to both ends thereof as one line of data to provide an edge list exemplified in FIG. 3A. create. Further, the network diagram creation unit 12 creates a node list illustrated in FIG. 3B based on the piping configuration data. The node list includes "Piping / Part Number", "TYPE", "Merge / Branch", and "X" from the equipment of the piping configuration data and the data related to branching or merging (for example, the data in the 2nd to 4th lines of FIG. 2B). , "Y" can be created by extracting the values in each column.

The network diagram creation unit 12 creates the network diagram illustrated in FIG. 4 based on the edge list and the node list (note that the edge 060B-1 is displayed as connected to the node MOV-011B in FIG. 4). However, in reality, as shown in FIG. 2A, the node between the edges 030B-1 and 020B-9 is connected to the node MOV-014B). For example, the network diagram creation unit 12 arranges each node at a position indicated by the coordinate information based on the coordinate information of X and Y of the node list, and arranges an edge connecting each node based on the edge list. Square and circle symbols indicating each node are predefined. For example, branching and connection with other drawings are defined as circles, and valves are defined as squares.
The network diagram creation unit 12 creates a network diagram by connecting each node with an edge represented by a line segment having a thickness corresponding to the size (pipe diameter) of the edge list. Further, the network diagram creating unit 12 determines the flow direction of the fluid flowing through the pipe by referring to the information of the “From node” and the “To node” in the edge list of FIG. 3A (from the “From node” to the “To node”. ”), An arrow indicating this flow direction is displayed on the edge line segment. The network diagram creation unit 12 outputs the created network diagram to the display device and draws it via the output unit 17.

In this way, the extraction device 10 converts the CAD data of the system diagram of the plant α into a network diagram. Since the CAD data of the system diagram includes all the components of the evaluation target object, by extracting the target range of evaluation from the network diagram converted from the CAD data of the system diagram, the evaluation target equipment and piping can be used. It is possible to prevent extraction omission. In addition, the target range of evaluation can be extracted in edge units by converting to a network diagram. For example, in the CAD data of the system diagram, multiple devices may be connected to one pipe, but by converting to a network diagram, the pipe can be divided for each connection point of the device, and the edges and nodes can be connected. The system is expressed by the combination. Therefore, only the edges in the range required for PRA can be extracted as the main pipe and the branch pipe (described later) without being affected by the piping configuration in the range not required for PRA.

(Setting of analysis conditions)
The engineer who performs the reliability evaluation sets the analysis conditions while referring to the network diagram. For example, the analysis condition setting unit 13 outputs the setting screen 50 shown in FIG. 5A. The technician sets the scope of evaluation and the state of the node. Specifically, the engineer sets the start point and the end point from the network diagram as the setting of the evaluation target range. In the network diagram illustrated in FIG. 4, since the right end of the edge 020B-9 is uniquely determined as the start point, the engineer sets the end point on the setting screen 50. For example, the technician defines node VLV-013B as the end point (route information "End").

In addition, the engineer sets the state change for the node to be evaluated. For example, the technician sets the initial state and the changed state of the valve to be evaluated. In the example of FIG. 5A, Open is set in the initial state of the node MOV-011B, Open is set in the changed state, Close is set in the initial state of the node MOV-014B, and Close is set in the changed state. That is, the maintenance of the initial state is set in the state after the change from the initial state. The technician presses the setting button 51 when the setting of the start point and the end point and the setting of the state change are completed. The setting of analysis conditions (setting of start point and end point and setting of state change) can be said to be operation mode setting. For example, in the plant α, when MOV-011B is opened, MOV-014B is closed, and the reliability is evaluated when the fluid is operated in the operation mode in which the fluid flows in the directions of arrows 52 and 53 in FIG. 5B, FIG. 5A is shown. Make the following settings (analysis condition 1).

(Extraction of main pipes, branch pipes, and nodes)
When the setting button 51 is pressed, the extraction unit 14 extracts the main pipe and the branch pipe in the set operation mode, and extracts the nodes on the main pipe and the branch pipe. The main pipe indicates the route through which the fluid should flow in order to achieve the system function in the set operation mode, and the branch pipe indicates the route connected to the main pipe. In the network diagram shown in FIG. 5B, the main pipe is a path connecting the edge 020B-9, the edge 030B-1, the edge 040B-1, the edge 040B-2, the edge 040B-3, the edge 050B-2, and the edge 050B-1. Is. The branch pipe is a path connecting the edge 060B-1, the edge 070B-1, the edge 070B-2, the edge 070B-3, and the edge RCS-026B connected to the main pipe by the node MOV-011B. For example, if an abnormality occurs at the node MOV-014B of the branch pipe and the fluid passes through the node MOV-014B that should be closed, the fluid that should flow through the main pipe will flow toward the branch pipe, which will affect the system function. Occurs. In order to evaluate the reliability including the case where such a situation occurs, the extraction unit 14 extracts not only the main pipe but also the branch pipe based on the analysis conditions. In addition, the extraction unit 14 excludes nodes and edges that do not significantly affect the evaluation from the evaluation target. In the example of FIG. 5B, the extraction unit 14 does not extract the edge 653B, the edge 654B, and the edge 655B having a small size (pipe diameter) as the evaluation target range. When the main pipe and the branch pipe are extracted, the extraction unit 14 extracts the nodes existing on the main pipe and the branch pipe. Specifically, the extraction unit 14 extracts the node MOV-011B, the node SRO-001B, the node VLV-012B, and the node VLV-013B with respect to the main pipe. The extraction unit 14 extracts the node MOV-014B, the node SRO-002B, and the node VLV-015B with respect to the branch pipe. A technician separately sets what kind of node is extracted (for example, valves and pumps are extracted) and what kind of node is not extracted (for example, the node indicating a branch is not extracted). The content is registered in the storage unit 18. The extraction unit 14 outputs the extracted edge and node information to the network diagram creation unit 12. The network diagram creation unit 12 displays the extracted edges and nodes in various modes. For example, the network diagram creating unit 12 displays the main pipe and the valve in the first closed state of the branch pipe (node MOV-014B) in green, and the route after the valve in the first closed state of the branch pipe in blue. Further, the network diagram creation unit 12 displays, for example, a node corresponding to a device having a request for a state change by enclosing it in a red square (although not shown in FIG. 5B, the thick solid square shown in FIG. 5D is a red square. (Described later), the nodes corresponding to the devices that are required to maintain the state are displayed by enclosing them in red triangles (thick solid triangles in FIG. 5B). Further, a node (SRO-001B or the like) that does not need to consider the state change is displayed by being surrounded by a blue square (a thick broken line square in FIG. 5B).

An example of setting other analysis conditions (analysis condition 2) is shown in FIG. 5C. In the example of FIG. 5C, node OPC_RCS-026B is set at the end point, Open is set in the initial state of node MOV-011B, Close is set in the changed state, Close is set in the initial state of node MOV-014B, and the changed state is set. Open is set to. That is, a state change request from the initial state is set.
Based on the analysis conditions of FIG. 5C, the extraction unit 14 connects the edge 020B-9, the edge 060B-1, the edge 070B-1, the edge 070B-2, the edge 070B-3, and the edge RCS-026B as the main piping. To extract. The extraction unit 14 extracts a path connecting the edge 030B-1, the edge 040B-1, the edge 040B-2, the edge 040B-3, the edge 050B-1, and the edge 050B-2 as a branch pipe. The extraction unit 14 extracts the node MOV-014B, the node SRO-002B, and the node VLV-015B with respect to the main pipe. The extraction unit 14 extracts the node MOV-011B, the node SRO-001B, the node VLV-013B, and the node VLV-012B with respect to the branch pipe.
As shown in FIG. 5D, the network diagram creating unit 12 differs between the main pipe and the valve in the first closed state of the branch pipe (node MOV-011B) and the route after the valve in the first closed state of the branch pipe. It is displayed in color, for example, a node with a state change request is displayed by enclosing it in a red square (thick solid line square).

(Creation of simplified system diagram)
The simplified system diagram creation unit 15 creates a simplified system diagram composed of main pipes, branch pipes, and nodes extracted by the extraction unit 14. An example of a simplified system diagram is shown in FIGS. 6A and 6B.
The simplified system diagram 60 shown in FIG. 6A is a simplified system diagram created by the simplified system diagram creating unit 15 based on the analysis condition 1 shown in FIG. 5A. In the simplified system diagram 60, the main pipe is shown in thick line, the open valve (node MOV-011B) is shown in white, and the closed valve (node MOV-014B) is shown in black.
The simplified system diagram 60 shown in FIG. 6B is a simplified system diagram created by the simplified system diagram creating unit 15 based on the analysis condition 2 shown in FIG. 5C.
An image showing a valve or the like is recorded in the storage unit 18 for each type of node, and the simplified system diagram creation unit 15 reads out an image for each type of each node based on the extraction result by the extraction unit 14. Then, a simplified system diagram 60 is created. The simplified system diagram creating unit 15 displays the main pipe with a thick line and the branch pipe with a thin line, and does not display the edges and nodes not extracted by the extraction unit 14.

As shown in the figure, the simplified system diagram 60 displays a simple system diagram in which only the target range of evaluation is extracted from the system diagram of the plant α, and the node that needs attention in performing the reliability evaluation ( Only valves, pumps, etc.) are displayed. The types of nodes that need attention are registered in advance, and the extraction unit 14 extracts only these nodes. The CAD data of the system diagram contains detailed design information including configurations that are not necessary for reliability evaluation, but conventionally, engineers who perform reliability evaluation have used the system diagram illustrated in FIG. 2 as an example. Work such as manually coloring the main pipes and branch pipes on the electronic data and the paper on which the system diagram is printed, and marking the nodes to be evaluated (nodes that change the state). Was going. On the other hand, according to the present embodiment, the CAD data of the system diagram is input to the extraction device, and the analysis conditions illustrated in FIGS. 5A and 5C are input, and the evaluation has been manually created so far. The same result as the system diagram of the target range can be obtained.

(Creation of basic event list)
The basic event list creation unit 16 identifies a failure mode that affects the system function based on the analysis conditions, and creates a failure mode list (basic event list) of the device for each analysis condition. FIG. 7A shows a list of basic events of node MOV-011B based on the analysis conditions shown in FIG. 5A, and FIG. 7B shows a list of basic events of node MOV-011B based on the analysis conditions shown in FIG. 5B.
For example, if the device to be evaluated is a valve, "open failure", "close failure", "control circuit operation failure", "blockage", "internal leak", "misclosed", "misopening", "external" Possible failure modes such as "leak" are preset. The basic event list creation unit 16 identifies a failure mode that may occur in the state change set by the analysis condition from these, and outputs the specified content to the basic event list.

For example, in the case of the analysis condition 1 of FIG. 5A, since the node MOV-011B maintains the open state, “open failure”, “close failure”, “control circuit operation failure”, “internal leak”, “external leak”. Etc. do not occur. The basic event list creating unit 16 identifies as a failure mode in which "blockage" and "erroneous closing (erroneous closing)" can occur, and creates a basic event list illustrated in FIG. 7A. The basic event list creation unit 16 may also create a basic event list for other nodes such as node MOV-014B and node SRO-001B.

Further, in the case of the analysis condition 2 of FIG. 5B, since the node MOV-011B shifts from the open state to the closed state, “open failure”, “blockage”, “external leak” and the like do not occur. The basic event list creation unit 16 identifies as a failure mode in which "close failure", "control circuit operation failure", "internal leak", and "erroneous opening (erroneous opening)" can occur, and is illustrated in FIG. 7B. Create an event list.
In the past, a technician performing reliability evaluation manually created a basic event list for each node in the evaluation target range extracted from the system diagram. On the other hand, according to this embodiment,
The basic event list can be automatically created only by inputting the CAD data of the system diagram into the extraction device and setting the analysis condition 1 and the like.

Next, a series of processing flows from the input of CAD data to the output of the basic event list will be described. FIG. 8 is a flowchart showing an example of an extraction process of an evaluation target range according to an embodiment.
First, the engineer inputs the CAD data (pipe configuration data and pipe connection data) of the system diagram to the extraction device 10. The CAD data acquisition unit 11 acquires the input CAD data (step S1) and records it in the storage unit 18. Next, the technician instructs the extraction device 10 to create the network diagram. The network diagram creation unit 12 creates an edge list and a node list (step S2), and records them in the storage unit 18. Next, the network diagram creation unit 12 creates a network diagram from the edge list and the node list (step S3). Further, the analysis condition setting unit 13 creates the setting screen 50 illustrated in FIG. 5A. The output unit 17 displays, for example, the network diagram and the setting screen 50 on a display device connected to the extraction device 10.

The technician inputs the analysis conditions on the setting screen 50. Specifically, the engineer sets the start point, end point, and state change of the evaluation target node of the evaluation target range. When a plurality of routes are assumed from the start point to the end point, a relay point may be set to determine the main pipe. By setting the start point and the like, only the range defined by the start point and the end point (the range necessary for reliability evaluation) can be extracted as the evaluation target range from the entire system diagram. Further, for example, even if the start point and the end point are the same, it may be possible to assume a plurality of different states for nodes such as valves and pumps in the middle. If they are in different states, they are in different operating modes. By setting the state change in addition to the start point and end point, it is possible to extract the evaluation target range for each operation mode.
Further, for example, the setting screen 50 may be provided with an interface that allows the analysis conditions to be set together with the operation mode identification information so that the analysis conditions can be set for each of a plurality of operation modes.

When the technician inputs the analysis conditions, the analysis condition setting unit 13 acquires the analysis condition settings (step S4). The analysis condition setting unit 13 records the analysis condition in the storage unit 18. Next, the extraction unit 14 extracts the target range for evaluation. First, the extraction unit 14 extracts the target range for the edge (step S5). For example, the extraction unit 14 specifies a path through which the fluid flows based on the start point, end point, and node state settings, as well as the node list and edge list, and the specified path is used as the main pipe. The extraction unit 14 extracts the edges constituting the main pipe and the nodes connected to the edges. Further, the extraction unit 14 identifies an edge connected to the main pipe, a node connected to the edge, another edge connected to the node, and the like, and serves as a branch pipe. The range of branch pipes is preset. For example, the path from the node on the main pipe to the node of the first closed valve is the branch pipe in the first range, and then from the node of the first closed valve to the next closed valve. The route to correspond to is extracted as a branch pipe in the second range. In addition, the extraction unit 14 also performs processing such as excluding edges having a small diameter that are not considered to affect the achievement of the system function. That is, the extraction unit 14 does not select the small-diameter edge as the main pipe or branch pipe.

After extracting the main pipe and the branch pipe, the extraction unit 14 next extracts the nodes in the target range (step S6). The extraction unit 14 extracts the node on the main pipe and the node on the branch pipe from the main pipe and the branch pipe extracted in step S5. Further, the information of these nodes may be output as a list of devices to be evaluated.

The network diagram creation unit 12 may update the network diagram created in step S3 to a network diagram in which the main pipes, branch pipes, and nodes extracted by the extraction unit 14 are highlighted as follows, for example. .. For example, the edges constituting the main pipe and the branch pipe in the first range are displayed by a thick green line, and the edges constituting the branch pipe in the second range are displayed in blue. For example, the device corresponding to the node that needs to change the state is surrounded by a red square (thick solid line square in the example of FIG. 5D) and displayed. The devices corresponding to the nodes that need to maintain the state are displayed by enclosing them with red triangles (thick solid triangles in the example of FIG. 5D). Devices corresponding to nodes that do not need to consider state changes are displayed by enclosing them in blue squares (thick broken line squares in the examples of FIGS. 5B and 5D).

When the extraction unit 14 extracts the target range, the simplified system diagram creating unit 15 creates the simplified system diagram 60 (step S7). The simplified system diagram creating unit 15 creates a simplified system diagram 60 exemplified in FIGS. 6A and 6B. The output unit 17 outputs the simplified system diagram 60 as an electronic file. The output unit 17 may display the simplified system diagram 60 on the display device.

Next, the basic event list creation unit 16 specifies the failure mode (step S8). The basic event list creation unit 16 specifies, for each node to be evaluated, a failure mode that may occur when a state change (including state maintenance) set in the analysis conditions occurs for the device corresponding to the node. Also, for devices that do not need to consider state changes, identify possible failure modes. The basic event list creation unit 16 outputs the specified failure mode as a basic event list (step S9).

When all the evaluation target ranges are extracted, the target range extraction process is terminated. If there is another evaluation target range to be extracted, the processes after step S4 are repeated.

Conventionally, the range extraction for creating a PRA model (FT diagram, etc.) for a system diagram has been performed manually. In the present embodiment, only the CAD data of the system diagram is input, and the CAD data is automatically converted into a network diagram and presented to the engineer. By presenting a simple network diagram, it becomes easier for engineers to grasp and set the extraction range. In addition, by inputting analysis conditions, input data (data for creating a PRA model) for reliability evaluation can be efficiently created in a shorter time than manually by automatically extracting the target range / equipment. Even if the CAD data is updated due to the design change, a simplified system diagram and a list of basic events related to the plant after the design change can be output simply by inputting the new CAD data into the extraction device 10 and inputting the analysis conditions. can do. This makes it possible to promptly confirm the reliability evaluation due to the design change.

In the above embodiment, in order to create a PRA model for the reliability evaluation of the nuclear power plant, the target range of the reliability evaluation is extracted based on the CAD data of the system diagram of the nuclear power plant. Is not limited to the reliability evaluation of nuclear plants. Further, it can be applied not only to the PRA model but also to the industrial field where reliability evaluation is performed by other methods. Further, the system diagram is not limited to the plant, and may be a system diagram of electrical wiring or a system diagram of a control system.

FIG. 9 is a diagram showing an example of the hardware configuration of the extraction device according to the embodiment.
The computer 900 includes a CPU 901, a main storage device 902, an auxiliary storage device 903, an input / output interface 904, and a communication interface 905.
The above-mentioned extraction device 10 is mounted on the computer 900. Each of the above-mentioned functions is stored in the auxiliary storage device 903 in the form of a program. The CPU 901 reads the program from the auxiliary storage device 903, expands it to the main storage device 902, and executes the above processing according to the program. Further, the CPU 901 secures a storage area in the main storage device 902 according to the program. Further, the CPU 901 secures a storage area for storing the data being processed in the auxiliary storage device 903 according to the program.

A program for realizing all or a part of the functions of the extraction device 10 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. Processing by the functional unit may be performed. The term "computer system" as used herein includes hardware such as an OS and peripheral devices. Further, the "computer system" includes the homepage providing environment (or display environment) if the WWW system is used. Further, the "computer-readable recording medium" refers to a portable medium such as a CD, DVD, or USB, or a storage device such as a hard disk built in a computer system. Further, when this program is distributed to the computer 900 by a communication line, the distributed computer 900 may expand the program to the main storage device 902 and execute the above processing. Further, the above-mentioned program may be for realizing a part of the above-mentioned functions, and may be further realized for realizing the above-mentioned functions in combination with a program already recorded in the computer system. ..

As described above, some embodiments according to the present disclosure have been described, but all of these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and variations thereof are included in the scope of the invention described in the claims and the equivalent scope thereof, as are included in the scope and gist of the invention.

<Additional Notes>
The extraction method, extraction device, and program to be evaluated described in each embodiment are grasped as follows, for example.

(1) The method of extracting the evaluation target according to the first aspect is a network composed of edges and nodes from the configuration data (pipe configuration data, pipe connection data) of the system diagram of the evaluation target (plant, system, etc.). Target of reliability evaluation based on the step of creating a diagram (FIG. 4) (step S3 of FIG. 8), the step of acquiring analysis conditions for the network diagram (step S4 of FIG. 8), and the analysis conditions. A step of extracting the edge included in the range (step S5 in FIG. 8), a step of extracting the node connected to the extracted edge (step S6 in FIG. 8), and the extracted edge and the node. It includes a step (step S7 in FIG. 8) of creating a simplified system diagram (FIGS. 6A and 6B) showing the configuration necessary for the reliability evaluation extracted from the configuration of the system diagram.
This is a simplified system diagram that extracts the target range of reliability evaluation from the entire system diagram of the plant, etc., and displays only the system (main piping, branch pipe) and equipment configuration required for evaluation in that target range. Can be automatically output, and the range extraction work can be labor-saving and efficient. In addition, the work of creating a PRA model becomes easy based on a simplified system diagram that extracts the target range of reliability evaluation.

(2) The method for extracting the evaluation target according to the second aspect is the method for extracting the evaluation target according to (1), and the constituent data of the system diagram is the CAD data of the system diagram, and the evaluation target is described. Includes the components that make up and their connection information.
Since the CAD data of the system diagram of the evaluation target can be used, a simplified system diagram based on the design data can be obtained, and it is possible to easily respond to the design change.

(3) The evaluation target extraction method according to the third aspect is the evaluation target extraction method of (1) to (2), and the analysis condition is composed of the edge of the target range and the node. In the step of creating the simplified system diagram, which includes the setting of the operation mode of the system (FIGS. 5A and 5C), the simplified system diagram corresponding to the operation mode is created.
By setting the operation mode for which reliability is to be evaluated, a simplified system diagram for each operation mode can be created. By creating a simplified system diagram for each operation mode, it becomes easy to create a PRA model for each operation mode.

(4) The evaluation target extraction method according to the fourth aspect is the evaluation target extraction method of (1) to (3), and the analysis condition is composed of the edge of the target range and the node. In the step of extracting the edge, which includes setting the start point or the end point of the system, the main route (main pipe) of the system is determined based on the analysis conditions, and the edge constituting the main route is extracted. ..
The target range of evaluation can be specified by setting the start point and end point, and the main route can be determined from various systems included in the target range.

(5) The method for extracting the evaluation target according to the fifth aspect is the method for extracting the evaluation target according to (4), and in the step of extracting the edge, the edge constituting the main path (main pipe) is used. The other edges to be connected are extracted as a secondary route (branch pipe).
As a result, the sub-routes that can affect the main route can be extracted as the evaluation target range.

(6) The evaluation target extraction method according to the sixth aspect is the evaluation target extraction method of (1) to (5), and the analysis condition specifies a state change of the node in the target range. It further includes a step (step S8 in FIG. 8) of identifying an abnormality (failure mode) that may occur in the state change, including the setting.
This makes it possible to identify the risk (what kind of abnormality can occur) when a state change occurs in a node included in the target range of evaluation.

(7) The evaluation target extraction method according to the seventh aspect is the evaluation target extraction method of (6), and is a basic event list (FIGS. 7A, 7B) that presents candidates for abnormalities that may occur in the state change. ) Is further included (step S9 in FIG. 8).
As a result, it is possible to grasp the risk when a state change occurs in the nodes included in the target range of evaluation.

(8) The method for extracting the evaluation target according to the eighth aspect is the method for extracting the evaluation target according to (1) to (7), and in the simplified system diagram, the edge and the node in the target range are configured. The main route in the system to be used and the sub-route connected to the main route are shown.
As a result, which of the extracted edges and nodes of the target range constitutes the main pipe (the route operating to perform the function of the system), and which route affects the main pipe. It is possible to grasp whether it is an edge or a node that constitutes a possible branch pipe.

(9) The extraction device 10 according to the ninth aspect analyzes the network diagram creation unit 12 that creates a network diagram composed of edges and nodes from the configuration data of the system diagram of the evaluation target, and the network diagram. The analysis condition setting unit 13 for acquiring the condition setting and the extraction unit 14 for extracting the edge included in the target range of the reliability evaluation and the node connected to the edge based on the analysis condition were extracted. A simplified system diagram creating unit 15 including the edge and the node and creating a simplified system diagram showing a configuration necessary for reliability evaluation extracted from the configuration of the system diagram is provided.

(10) In the program according to the tenth aspect, the computer 900 is provided with a step of creating a network diagram composed of edges and nodes from the configuration data of the system diagram of the evaluation target, and analysis conditions for the network diagram. A step to set, a step to extract the edge included in the target range of reliability evaluation based on the analysis condition, a step to extract the node connected to the extracted edge, the extracted edge, and the extracted edge. The step of creating a simplified system diagram showing the configuration necessary for the reliability evaluation by extracting the configuration necessary for the reliability evaluation from the configuration of the system diagram including the node is executed.

10 ... Extraction device 11 ... CAD data acquisition unit 12 ... Network diagram creation unit 13 ... Analysis condition setting unit 14 ... Extraction unit 15 ... Simplified system diagram creation unit 16 ... Base Event list creation unit 17 ... Output unit 18 ... Storage unit 900 ... Computer 901 ... CPU,
902 ... Main memory,
903 ... Auxiliary storage device,
904 ... Input / output interface 905 ... Communication interface

Claims (10)

Steps to create a network diagram consisting of edges and nodes based on the configuration data of the system diagram of the evaluation target, and
For the network diagram, the step of setting the analysis conditions and
Based on the analysis conditions, the step of extracting the edge included in the target range of the reliability evaluation and
The step of extracting the node connected to the extracted edge and
A step of creating a simplified system diagram showing the extracted configuration including the edge and the node and extracting the configuration necessary for the reliability evaluation from the configuration of the system diagram.
Extraction method of evaluation target having. The method for extracting an evaluation target according to claim 1, wherein the configuration data of the system diagram is CAD data, and includes components constituting the evaluation target and connection information thereof. The analysis condition includes setting the operation mode of the system composed of the edge and the node in the target range.
In the step of creating the simplified system diagram, the simplified system diagram corresponding to the operation mode is created.
The method for extracting an evaluation target according to claim 1 or 2. The analysis condition includes setting a start point or an end point for a system composed of the edge and the node in the target range.
In the step of extracting the edge, the main path of the system is determined based on the analysis conditions, and the edge constituting the main path is extracted.
The method for extracting an evaluation target according to any one of claims 1 to 3. In the step of extracting the edge, another edge connected to the edge constituting the main path is extracted as a sub-path.
The method for extracting an evaluation target according to claim 4. The analysis condition includes a setting for designating a state change of the node in the target range.
Further comprising a step of identifying possible anomalies in the state change.
The method for extracting an evaluation target according to any one of claims 1 to 5. The method for extracting an evaluation target according to claim 6, further comprising a step of outputting a list of basic events that presents candidates for abnormalities that may occur in the state change. In the simplified system diagram, a main route in a system composed of the edge and the node in the target range and a sub route connected to the main route are shown.
The method for extracting an evaluation target according to any one of claims 1 to 7. A network diagram creation unit that creates a network diagram consisting of edges and nodes based on the configuration data of the system diagram of the evaluation target,
For the network diagram, the analysis condition setting unit for acquiring the analysis condition settings and
Based on the analysis conditions, an extraction unit that extracts the edge included in the target range of reliability evaluation and the node connected to the edge, and an extraction unit.
A simplified system diagram creation unit that includes the extracted edges and the nodes and creates a simplified system diagram showing the configuration required for reliability evaluation extracted from the configuration of the system diagram.
Extractor equipped with. On the computer
Steps to create a network diagram consisting of edges and nodes based on the configuration data of the system diagram of the evaluation target, and
For the network diagram, the step of setting the analysis conditions and
Based on the analysis conditions, the step of extracting the edge included in the target range of the reliability evaluation and
The step of extracting the node connected to the extracted edge and
A step of creating a simplified system diagram showing the extracted configuration including the edge and the node and extracting the configuration necessary for the reliability evaluation from the configuration of the system diagram.
A program to execute.

Images