Plant accident response support system

Abstract

To provide an accident response support system for a plant capable of supporting a response to an accident hard to respond.SOLUTION: An accident response support system for a plant comprises: response propriety determination means 3 configured to determine propriety of a response to an accident by a response method on the basis of plant information indicative of a state of the plant, accident event information on the accident in the plant, and procedure information including response method information indicative of a response method to the accident indicated by the accident event information; exceptional accident information extraction means 4 configured to, when the response propriety determination means 3 determines that the response method cannot response to the accident, extract information indicative of states corresponding to the plant state from a plurality of pieces of exceptional event information, which is information on exceptional accidents with no response methods having been prepared; and exceptional response acquisition means 5 configured to acquire the exceptional response information associated with the exceptional event information extracted by the exceptional event information extraction means 4 and indicative a response method to the exceptional accident.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an accident response support system for a plant, which supports responses to accidents that occur in a plant such as a nuclear power plant. [Background technology]

[0002] Conventionally, various systems have been proposed to support responses to accidents in plants such as nuclear power plants. For example, Patent Document 1 discloses a system that selects and presents a procedure manual appropriate for an accident that has occurred in a plant based on information about the accident. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. WO2015 / 151267 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, some accidents that occur in plants are difficult to deal with and cannot be resolved by following the instructions in the procedure manual, and when such accidents occur, it can be difficult to find an appropriate response.

[0005] In view of the above circumstances, an object of the present invention is to provide an accident response support system for a plant that can support responses to accidents that are difficult to deal with. [Means for solving the problem]

[0006] The plant accident response support system of the present invention comprises: a response feasibility determination means for determining whether or not an accident can be handled by the response method indicated by the response method information based on plant information indicating the state of the plant, accident event information which is information relating to accidents that are expected to occur in the plant, and procedure manual information which includes response method information indicating how to handle the accident indicated by the accident event information; an exceptional accident information extraction means for extracting, when the response feasibility determination means determines that an accident cannot be handled using the response method indicated by the response method information, information indicating a state corresponding to the plant state indicated by the plant information from among a plurality of exceptional event information which is information regarding exceptional accidents for which the response method indicated by the response method information is not applicable; The exception handling acquisition means acquires exception handling information associated with the exceptional event information extracted by the exceptional accident information extraction means, the exception handling information indicating a method of handling the exceptional accident.

[0007] According to the accident response support system for plants configured as described above, even if an accident occurs that is not anticipated in the procedure manual information equivalent to a procedure manual, it is possible to obtain information on the accident corresponding to the event occurring in the plant (exceptional event information) and how to respond to it (exception response information), thereby encouraging appropriate response even in the case of an accident that is difficult to respond to using the predetermined response methods.

[0008] In the plant accident response support system of the present invention, the plurality of exceptional event information includes initial event information indicating the state of the plant at the time when the accident occurred in the plant; the exceptional accident information extraction means includes an initial event extraction means for extracting, from the plurality of pieces of initial event information, the initial event information corresponding to the plant state indicated by the plant information, The exception response acquisition means may acquire the exception response information associated with the initial event information extracted by the initial event extraction means.

[0009] According to the accident response support system for plants configured as described above, it is possible to obtain information on the first accident that occurs at the plant and how to respond to that accident, thereby encouraging appropriate responses to accidents that occur at the plant from an early stage.

[0010] In the plant accident response support system of the present invention, The plurality of exceptional event information includes a plurality of progression event information indicating the state of the plant at the time when an accident occurring in the plant progresses, the exceptional accident information extraction means includes a progressing event extraction means for extracting, from the plurality of progressing event information, the progressing event information that indicates the same state as the plant state indicated by the plant information, The exception handling acquisition means may acquire the exception handling information associated with the progress event information extracted by the progress event extraction means.

[0011] According to the accident response support system for plants configured as described above, even if an accident that has occurred at a plant has progressed, information on the progressed accident and how to respond to the accident can be obtained, and therefore appropriate responses can be encouraged even if the accident that has occurred at a plant has progressed.

[0012] The plant accident response support system of the present invention comprises: The exceptional accident information extraction means a similar event extraction means for extracting, from the plurality of pieces of exceptional event information, exceptional event information that indicates a state similar to the state of the plant indicated by the plant information, The exception response acquisition means may acquire the exception response information associated with the exceptional event information extracted by the similar event extraction means.

[0013] According to the plant accident response support system configured as described above, it is possible to support the search for an appropriate response method by analogizing the phenomena occurring in the plant. [Effects of the Invention]

[0014] As described above, the plant accident response support system of the present invention can provide the excellent effect of supporting responses to accidents that are difficult to deal with. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a block diagram of an accident response support system for a plant according to one embodiment of the present invention. [Figure 2] FIG. 2 is an explanatory diagram of an example of a storage means of the plant accident response support system according to the embodiment. [Figure 3] FIG. 3 is an explanatory diagram of procedure manual information used in the plant accident response support system according to the embodiment. [Figure 4] FIG. 4 is an explanatory diagram of scenario information used in the plant accident response support system according to the embodiment. [Figure 5] FIG. 5 is a main flowchart of the plant accident response support system according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an accident response support system for a plant (hereinafter referred to as the support system) according to one embodiment of the present invention will be described with reference to the accompanying drawings.

[0017] As shown in Figure 1, the support system 1 of this embodiment is equipped with an information acquisition means 2 that acquires plant information indicating the state of the plant, a response feasibility determination means 3 that determines whether it is possible to respond to an accident occurring in the plant using the response method in the procedure manual based on the plant information and procedure manual information D1 (see Figure 3) as a procedure manual that indicates accidents that may occur in the plant and how to respond to those accidents, an exceptional accident information extraction means 4 that, when the response feasibility determination means 3 determines that it is not possible to respond to an accident occurring in the plant using the response method in the procedure manual, extracts exceptional accident information corresponding to the state of the plant indicated by the plant information from a plurality of exceptional accident information D2 (see Figure 4) that indicates information on accidents other than the accidents indicated in the procedure manual (hereinafter referred to as exceptional accidents), an exceptional event information acquisition means 5 that acquires exceptional response information associated with the exceptional event information extracted by the exceptional accident information extraction means 4 and that indicates how to respond to the exceptional accident, a risk assessment means 6 that evaluates risk using probabilistic risk assessment (so-called PRA), and a display means 7 that displays the evaluation results of the risk assessment means 6.

[0018] An event is a phenomenon occurring in a plant where an accident has occurred, and the event changes over time.

[0019] The plant information acquired by the information acquiring means 2 is, for example, information indicating the operating status of equipment, information measured by a sensor, etc. Furthermore, the information acquiring means 2 may be configured to acquire plant information from equipment or sensors installed in the plant, or may be configured to read out plant information stored in storage means such as a hard disk.

[0020] In the support system 1 according to this embodiment, a plurality of pieces of procedure manual information D1 are stored in the storage means 8 (see FIG. 2).

[0021] As shown in FIG. 3, the procedure manual information D1 includes a plurality of pieces of accident event information D10 and a plurality of pieces of response method information D11.

[0022] Each of the multiple accident event information D10 is associated with response method information D11 that indicates a response method for resolving the event indicated by the accident event information D10 (i.e., a response method for returning the state of the plant in which the event indicated by the accident event information D10 is occurring to a normal state).

[0023] The accident event information D10 includes event identification information D100 for identifying an event occurring in the plant where the accident occurred, and accident status information D101 associated with the event identification information D100, which indicates the state of the plant when the event identified by the associated accident event information D10 occurs.

[0024] The event identification information D100 is set with information indicating, for example, a phenomenon occurring in the plant where the accident occurred (for example, a reactor scram, a turbine trip, etc.).

[0025] The accident state information D101 may include, for example, the type of warning, the lighting state of the indicator light, the operating state of the equipment, the value indicated by the meter, and the like.

[0026] In the procedure manual information D1, the plurality of pieces of accident event information D10 may be arranged in an order following the flow of the progression of the accident (change in events). That is, the plurality of pieces of accident event information D10 may be associated with each other to indicate a scenario of an accident that occurred in the plant.

[0027] As shown in FIG. 1, the response feasibility determination means 3 has a procedure manual confirmation means 30 that confirms whether or not a response method that can be used to deal with an event occurring in a plant where an accident has occurred is included in the procedure manual, and a determination result output means 31 that outputs the determination result made by the procedure manual confirmation means 30.

[0028] The procedure manual confirmation means 30 is configured, for example, to compare the accident condition information contained in the accident event information of the procedure manual information with the plant information, and determine whether the difference between the accident condition information and the plant information is smaller or larger than a predetermined threshold value.

[0029] The procedure manual confirmation means 30 is configured to determine that, if it determines that the difference between the accident status information and the plant information is smaller than a predetermined threshold, it determines that the event occurring in the plant can be responded to using the response method indicated in the response method information associated with the accident event information including the accident status information, and to determine that, if it determines that the difference between the accident status information and the plant information is greater than the predetermined threshold, it determines that the event occurring in the plant cannot be responded to using the response method indicated in the response method information associated with the accident event information including the accident status information.

[0030] In this way, the procedure manual confirmation means 30 is configured to determine whether or not there is response method information indicating a response method that can be used to respond to an event occurring in the plant, and if there is a response method that can be used to respond to an event occurring in the plant, to determine that it is possible to respond to the accident using the procedure manual, and if there is no response method that can be used to respond to an event occurring in the plant, to determine that it is impossible to respond to the accident using the procedure manual.

[0031] As described above, when multiple pieces of operating manual information are stored in the storage means 8, the operating manual confirmation means 30 may be configured to determine whether or not a response to an accident can be made for all pieces of operating manual information.

[0032] When the procedure manual checking means 30 determines that it is possible to deal with the accident based on the procedure manual information, the determination result output means 31 outputs this determination result to the risk assessment means 6.

[0033] On the other hand, when the operating manual checking means 30 determines that it is impossible to deal with the accident based on the operating manual information, the determination result output means 31 outputs this determination result to the exceptional accident information extraction means 4.

[0034] The exceptional accident information extraction means 4 uses exceptional accident information that indicates the progression flow (so-called scenario) of the state of the plant in which an accident that cannot be handled by the handling method information in the procedure manual information (hereinafter referred to as exceptional accident) has occurred.

[0035] 4, the exceptional accident information D2 includes a plurality of exceptional event information D20 indicating events (phenomena) occurring in the plant. The plurality of exceptional event information D20 may include information related to each other in order along the progression of the exceptional accident.

[0036] The exceptional event information D20 includes exceptional event identification information D200 indicating an event (phenomenon) occurring in the plant, and exceptional state information D201 associated with the exceptional event identification information D200, indicating the state of the plant when the accident indicated by the associated exceptional event identification information D200 occurred.

[0037] The exception event identification information D200 is also set with information indicating phenomena that are expected to occur in the plant (for example, reactor scram, turbine trip, etc.), and the exception status information D201 is also set with information such as the type of warning, the lighting status of indicator lights, the operating status of equipment, and values ​​indicated by meters.

[0038] In this embodiment, among the multiple exceptional event information D20, information that includes exceptional event identification information D200 indicating the phenomenon that occurs first in an exceptional accident is referred to as initial event information, and information that includes exceptional event identification information D200 indicating the phenomenon that follows the phenomenon that occurs first in an exceptional accident (a phenomenon that progresses from the phenomenon that occurs first) is referred to as progressing event information.

[0039] As shown in Figure 1, the exceptional accident information extraction means 4 has an initial event extraction means 40 that extracts initial event information including exceptional state information that matches the plant state indicated by the plant information, a progressing event extraction means 41 that extracts progressing event information including exceptional state information that matches the plant state indicated by the plant information, and a similar event extraction means 42 that extracts exceptional event information (initial event information or progressing accident event) that includes exceptional state information that is similar to the plant state indicated by the plant information.

[0040] The initial event information extracted by the initial event extraction means 40, the progress event information extracted by the progress event extraction means 41, and the initial event information and progress event information extracted by the similar event extraction means 42 are output to the risk assessment means 6.

[0041] The similar event extraction means 42 may be configured, for example, to change the exception state information of the initial event information or the exception state information of the progressing event extraction means 41 to determine whether or not they match the state indicated by the plant information, and if it is determined that they match, to extract the initial event information or the progressing event information as candidates for phenomena occurring in the plant.

[0042] The risk assessment means 6 is configured to receive information indicating phenomena occurring in the plant and information indicating the state of the plant, and to output a so-called event tree based on this information.

[0043] The display means 7 is configured to visually display the event tree output by the risk assessment means 6. Note that the display means 7 may be configured to display items with high importance in a different display mode from other items when displaying the event tree.

[0044] The configuration of the support system according to this embodiment is as described above. Next, the operation of the support system will be described.

[0045] 5, in the support system, the information acquisition means 2 acquires plant information (S1) and transmits the plant information to the response feasibility determination means 3. Then, the response feasibility determination means 3 determines whether or not it is possible to respond to the accident using the response method indicated in the response method information D11 based on the plant information and the procedure manual information D1 (S2).

[0046] In this embodiment, if the procedure manual confirmation means 30 determines that it is possible to respond to an accident using the procedure manual information D1, it assumes that it is possible to respond to the accident using the response method indicated in the response method information D11 based on the plant information and the procedure manual information D1 (Yes in S3), and the judgment result output means 31 outputs this judgment result to the risk assessment means 6.

[0047] In this case, the risk assessment means 6 performs a risk assessment based on the judgment result of the judgment result output means 31 (S4), the display means 7 displays the risk assessment result of the risk assessment means 6 (S5), and if the operation of the support system is to be continued (Yes in S6), the information acquisition means 2 acquires plant information again (S1).

[0048] On the other hand, if the procedure manual confirmation means 30 determines that it is not possible to respond to the accident using the procedure manual information D1, it assumes that it is not possible to respond to the accident using the response method indicated in the response method information D11 based on the plant information and the procedure manual information D1 (No in S3), and the judgment result output means 31 outputs this judgment result to the exceptional accident information extraction means 4.

[0049] In this case, the initial event extraction means 40 executes a process of extracting initial event information including exceptional state information that matches the state of the plant indicated by the plant information (S7).

[0050] If initial event information is extracted by the initial event extraction means 40 (Yes in S8), the risk assessment means 6 performs a risk assessment based on the initial event information extracted by the initial event extraction means 40 (S4), and the display means 7 displays the risk assessment result of the risk assessment means 6 (S5). Then, if the operation of the support system is to be continued (Yes in S6), the information acquisition means 2 acquires plant information again (S1).

[0051] If the initial event extraction means 40 is unable to extract the initial event information (No in S8), the progressing event extraction means 41 executes a process to extract progressing event information including exceptional state information that matches the plant state indicated by the plant information (S9).

[0052] If the progressing event extraction means 41 extracts progressing event information (Yes in S10), the risk assessment means 6 performs a risk assessment based on the progressing event information extracted by the progressing event extraction means 41 (S4), and the display means 7 displays the risk assessment result of the risk assessment means 6 (S5). Then, if the operation of the support system is to be continued (Yes in S6), the information acquisition means 2 acquires plant information again (S1).

[0053] If the progressing event extraction means 41 is unable to extract the progressing event information (No in S10), the similar event extraction means 42 extracts exceptional event information (initial event information or progressing event information) including exceptional state information similar to the plant state indicated by the plant information (S11).

[0054] If similar event information is extracted by the similar event extraction means 42 (Yes in S12), the risk assessment means 6 performs a risk assessment based on the similar event information extracted by the similar event extraction means 42 (S4), and the display means 7 displays the risk assessment result of the risk assessment means 6 (S5). Then, if the operation of the support system is to be continued (Yes in S6), the information acquisition means 2 acquires plant information again (S1).

[0055] If the similar event extraction means 42 does not extract similar event information (No in S12) and the operation of the support system is to be continued (Yes in S6), the information acquisition means 2 acquires plant information again (S1).

[0056] As described above, if there is no procedure manual information D1 containing accident status information D101 that matches the state of the plant, it becomes difficult to identify the phenomenon occurring in the plant, and therefore it becomes difficult to find a way to respond to the accident. However, with the support system 1 of this embodiment, even if an accident that is not anticipated in the procedure manual information D1 occurs, it is possible to obtain information on the accident corresponding to the event occurring in the plant (exceptional event information D2) and the way to respond to it (exception response information), so that it is possible to encourage appropriate response even in the case of an accident that is difficult to respond to using the predetermined response methods.

[0057] Therefore, the support system 1 can provide the excellent effect of supporting responses to accidents that are difficult to handle.

[0058] In addition, the support system 1 of this embodiment can acquire information on the phenomenon that first occurred in the plant (initial event information) using the initial event extraction means 40 of the exceptional accident information extraction means 4, and acquire a method of responding to that phenomenon using the exception response acquisition means 5.

[0059] Furthermore, the initial event extraction means 40 of the exception accident information extraction means 4 can acquire information on the phenomenon that first occurred in the plant (initial event information), and the exception response acquisition means 5 can acquire methods for responding to that phenomenon. The progression event extraction means 41 of the exception accident information extraction means 4 can acquire information on phenomena that have progressed from the phenomenon that first occurred in the plant (progression event information), and the exception response acquisition means 5 can acquire methods for responding to that phenomenon. Therefore, it is possible to prompt appropriate responses to accidents that occur in the plant, whether they are in the early stages or once the accident has progressed.

[0060] Furthermore, the similar event extraction means 42 of the exceptional accident information extraction means 4 can extract information on phenomena similar to the plant state from the initial event information and the progressing event information, and the exception response acquisition means 5 can acquire a method of responding to that phenomenon, thereby more flexibly supporting the search for a response method appropriate for an accident occurring in the plant.

[0061] Furthermore, in the support system of this embodiment, a series of processes from the process of acquiring plant information by the information acquisition means 2 to the process of performing risk assessment by the risk assessment means 6 are repeatedly executed continuously, while the results of the risk assessment by the risk assessment means 6 are displayed on the display means 7, thereby making it possible to monitor the risk state of the plant in real time. Furthermore, by checking a structure such as an event tree displayed on the display means 7 as the result of the risk assessment, it becomes possible to appropriately grasp the current state of the plant and necessary responses, taking into consideration the likelihood of the risks shown in such a structure occurring.

[0062] Furthermore, important items in the risk assessment are displayed in a different format from other items, making it possible to quickly grasp information that is important for responding to an accident. This makes it easier to take appropriate measures and further improves safety.

[0063] The plant accident response support system according to the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made within the scope of the gist of the present invention.

[0064] Although not specifically mentioned in the above embodiment, the exceptional accident information extraction means 4 may be configured to always execute the initial event extraction means 40, the escalating event extraction means 41, and the similar event extraction means 42, or may be configured to execute the escalating event extraction means 41 if the initial event extraction means 40 is unable to extract initial event information, and further to execute the similar event extraction means 42 if the escalating event extraction means 41 is unable to extract escalating event information.

[0065] Furthermore, when the exceptional accident information extraction means 4 extracts a plurality of initial event extraction means 40 and escalating event extraction means 41, it may output the one that is most suitable for the plant state to the risk assessment means 6, or it may output all of the extracted initial event extraction means 40 and escalating event extraction means 41 to the risk assessment means 6.

[0066] Although not particularly mentioned in the above embodiment, the support system 1 determines whether or not to execute processing by the exceptional accident information extraction means 4 based on the result of the determination by the response feasibility determination means 3 as to whether or not to respond to an accident based on the procedure manual information, but is not limited to this configuration. The support system 1 may be configured, for example, so that the response feasibility determination means 3 determines whether or not to respond to an accident based on the procedure manual information and whether or not to predict the progression of the accident, and determines whether or not to execute processing by the exceptional accident information extraction means 4 based on these determination results. The device may be configured to: [Explanation of symbols]

[0067] 1...support system, 2...information acquisition means, 3...measurement feasibility determination means, 4...exceptional accident information extraction means, 5...exceptional response acquisition means, 6...risk assessment means, 7...display means, 8...storage means, 30...procedure manual confirmation means, 31...determination result output means, 40...initial event extraction means, 41...progression event extraction means, 42...similar event extraction means, D1...procedure manual information, D10...accident event information, D100...event identification information, D101...accident state information, D11...response method information, D2...exceptional accident information, D20...exceptional event information, D200...exceptional event identification information, D201...exception state information

Claims

1. a response feasibility determination means for determining whether or not an accident can be handled by the response method indicated by the response method information based on plant information indicating the state of the plant, accident event information which is information relating to accidents that are expected to occur in the plant, and procedure manual information which includes response method information indicating how to handle the accident indicated by the accident event information; an exceptional accident information extraction means for extracting, when the response feasibility determination means determines that an accident cannot be handled using the response method indicated by the response method information, information indicating a state corresponding to the plant state indicated by the plant information from among a plurality of exceptional event information which is information regarding exceptional accidents for which the response method indicated by the response method information is not applicable; an exception response acquisition means for acquiring exception response information associated with the exceptional event information extracted by the exceptional event information extraction means, the exception response information indicating a method of responding to the exceptional event; The plurality of pieces of exceptional event information include: a plurality of pieces of initial event information indicating a state of the plant at the time when an accident occurred in the plant, the plurality of pieces of initial event information being associated with the exception response information; a plurality of pieces of progressing event information indicating the state of the plant at the time when an accident has occurred in the plant and progressed, the plurality of pieces of progressing event information being associated with the exception response information; The exceptional accident information extraction means an initial event extraction means for extracting, from the plurality of pieces of initial event information, the initial event information corresponding to the state of the plant indicated by the plant information; a progressing event extraction means for extracting, from the plurality of pieces of progressing event information, the progressing event information corresponding to the plant state indicated by the plant information, The exception response acquisition means When the initial event extraction means extracts the initial event information, the exception handling information associated with the initial event information is acquired; When the progress event extraction means extracts the progress event information, the exception handling information associated with the progress event information is acquired. An accident response support system for plants.

2. The plurality of exceptional event information includes: a plurality of pieces of similar event information indicating a state similar to the state of the plant indicated by the plant information, the plurality of pieces of similar event information being associated with the exception response information; The exceptional accident information extraction means a similar event extraction means for extracting, from the plurality of similar event information, the similar event information indicating a state similar to the state of the plant indicated by the plant information, the exception response acquisition means, when the similar event extraction means extracts the similar event information, acquires the exception response information associated with the similar event information; 2. The plant accident response support system according to claim 1.

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