Plant operation support system

Abstract

This plant operation assistance system: discerns an operating condition of engineered safety features (ESF) related to safety of a plant on the basis of plant parameter information that is plant information acquired from a plant apparatus (210); discerns whether there occurs a maintenance bypass in the ESF on the basis of plant equipment information; and discerns whether there occurs an operating bypass hindering operation of the ESF on the basis of permissive information. The operating condition (311-314) of the ESF, whether there occurs a maintenance bypass (321, 322), and whether there occurs an operating bypass (331) are each displayed at an output device (240) so as to be visible. The foregoing makes it possible to improve situational awareness, for an operations team that performs monitoring, pertaining to the state of apparatus tripping and ESF.

Description

Technical Field

[0001] This application relates to a plant operation support system.

Background Art

[0002] In the operation and maintenance of nuclear power plants, it is necessary to monitor and operate the overall nuclear power plant and the operating status and safety status of each device. Therefore, a monitoring control panel equipped with various monitoring functions and operating functions is provided in the nuclear power plant.Conventional monitoring control panels have mainly been hardware-based analog monitoring control panels, but in recent years, the introduction of software-based digital monitoring control panels has been progressing. Digital monitoring control panels mainly consist of an output device (e.g., a large display device) that aggregates and constantly displays plant information and alarms that are important during plant operation, or an input / output device through which individual operators perform monitoring and control through a graphical user interface (GUI).

[0003] Generally, the operation of a nuclear power plant is carried out by an operation team consisting of multiple operators who monitor and operate the monitoring control panel. When an abnormality occurs during plant operation, the operation team needs to recognize the operating status of Engineered Safety Feature (engineered safety facility, hereinafter referred to as ESF) related to the safety of the nuclear power plant and the device trip operation status of devices such as the reactor, and if there is an abnormality in the operation, it is necessary to perform corresponding operations. In addition, during plant operation, there is a risk of occurrence of a maintenance bypass, a situation where safety-critical facilities related to device trip operations and ESF operations cannot be operated due to reasons such as being under maintenance. Furthermore, there is a risk of occurrence of an operating bypass, a situation where ESF operations and device trip operations are blocked by a permissive signal sent because the plant is starting up or shutting down.

[0004] The operating team is aware of these ESF (Energy Storage Facility) malfunctions and takes corrective action if an ESF has become unintended. As an example of a system that supports the operating team's situational awareness, the operating status of ESFs during plant abnormalities, the status of equipment trips, and the status of maintenance bypasses for each ESF and equipment trip are constantly displayed in a list format on a large display device. It is known that such a system makes it easier for operators to understand which system has experienced a malfunction in the event of a serious safety abnormality (see, for example, Patent Document 1). [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Patent No. 5773565 [Overview of the project] [Problems that the invention aims to solve]

[0006] Conventional plant operation support systems focused on improving operator awareness during plant abnormalities, constantly displaying the operating status of ESFs and equipment trips, as well as ESF and equipment trip information affected by maintenance bypasses (a type of bypass), on a large display screen. However, they did not take into account the occurrence of operating bypasses during normal operation, such as plant startup and shutdown. To obtain information on ESFs and equipment trips whose operation is hindered by operating bypasses, it was necessary to operate a separate input / output device to display the information, which presented a challenge in quickly recognizing the operating status of ESFs and equipment trips.

[0007] This invention was made to solve the above-mentioned problems, and aims to provide a driver assistance system that improves the driver's awareness of the operating status of the ESF and equipment trip by displaying the operating status of the ESF, the presence or absence of maintenance bypass, and the presence or absence of operating bypass on the output device so that they can be visually observed. [Means for solving the problem]

[0008] The plant operation support system disclosed in this application is a system comprising a plant monitoring and control device and an operation support information generation device, wherein the plant monitoring and control device comprises plant equipment constituting the plant, a plant control device that outputs plant parameter information and plant equipment information, which are plant information acquired from the plant equipment, and permissive information generated based on the plant parameter information to the operation support information generation device, an input device that provides operation control input to the plant control device, and an information display processing unit that processes signals generated by the operation support information generation device for display on an output device, wherein the operation support information generation device comprises an engineering safety facility discrimination processing unit that determines the operating status of engineering safety facilities related to the safety of the plant based on the plant parameter information and transmits the discrimination result to the information display processing unit, a maintenance bypass discrimination processing unit that determines whether or not a maintenance bypass occurs in the engineering safety facilities based on the plant equipment information and transmits the discrimination result to the information display processing unit, and an operating bypass discrimination processing unit that determines whether or not an operating bypass occurs that prevents the operation of the engineering safety facilities based on the permissive information and transmits the result to the information display processing unit, wherein the operating status of the engineering safety facilities, whether or not a maintenance bypass occurs, and whether or not an operating bypass occurs are displayed on the output device so that they can be visually observed. [Effects of the Invention]

[0009] According to the plant operation support system disclosed in this application, the operating status of the ESF, the presence or absence of maintenance bypass, and the presence or absence of operating bypass are displayed on the output device in a visually observable manner, thereby improving the operating team's awareness of the operating status of the ESF and equipment trips. [Brief explanation of the drawing]

[0010] [Figure 1] This is a block diagram showing the configuration of the nuclear power plant operation support system according to Embodiment 1. [Figure 2] This is a flowchart showing the ESF discrimination processing unit processing flow according to Embodiment 1. [Figure 3] This flowchart shows the processing flow of the maintenance bypass discrimination processing unit according to Embodiment 1. [Figure 4] This is a flowchart showing the processing flow of the operating bypass discrimination processing unit according to Embodiment 1. [Figure 5] This figure shows an example of a screen display shown on the output display device according to Embodiment 1. [Figure 6] This is a block diagram showing the configuration of the nuclear power plant operation support system according to Embodiment 2. [Figure 7] This figure shows an example of data stored in the discrimination condition DB according to Embodiment 2. [Figure 8] This flowchart shows the processing flow of the operating bypass discrimination processing unit according to Embodiment 2. [Figure 9] This figure shows another example of data stored in the discrimination condition DB according to Embodiment 2. [Figure 10] This figure shows an example of the hardware configuration of a plant control device and an operation support information generation device according to an embodiment. [Modes for carrying out the invention]

[0011] Hereinafter, preferred embodiments of the plant operation support system according to the present application will be described with reference to the drawings. The same parts and components are denoted by the same reference numerals, and their detailed descriptions are omitted. Similarly, in subsequent embodiments, redundant descriptions of components denoted by the same reference numerals are omitted.

[0012] Embodiment 1. Figure 1 is a block diagram showing the configuration of a plant operation support system according to Embodiment 1. Embodiment 1 describes a nuclear power plant operation support system as an example, but is not limited to this. The nuclear power plant operation support system consists of a plant monitoring and control device 20A and an operation support information generation device 10A.

[0013] [Plant monitoring and control system] The plant monitoring and control system 20A consists of plant equipment 210, plant control device 220, information display processing unit 230A, output device 240, and input / output device 250. The input / output device 250 is an input / output terminal for operators to monitor the status of plant equipment 210 and to control plant equipment 210. The input / output device 250 may be, for example, a touch panel display or a combination of a display and a mouse, but is not limited to these. Inputs for control made by the operator via the input / output device 250 are transmitted to the plant control device 220 as control input information.

[0014] The plant control device 220 transmits the control input information received from the input / output device 250 to the plant equipment 210, receives the control status of the plant equipment 210 as plant parameter D221 (hereinafter referred to as plant parameter D221), and transmits it to the information display processing unit 230A, which will be described later. The plant parameter D221 (control status) is displayed on the output device 240.

[0015] In addition, the plant control device 220 periodically receives plant information regarding plant equipment 210 such as instruments. Alternatively, it receives the information based on a request from the operation support information generation device 10A. The plant information to be received is, in this embodiment, the plant parameter D221 and the plant facility information D222, but is not limited thereto. Further, the plant control device 220 uses the obtained plant parameter D221 to generate, as a type of plant information, the permissive information D223 according to the plant operation status.

[0016] The permissive information D223 is information used to block or permit plant equipment operation until a pre-defined criterion is satisfied. Examples of plant equipment operations include ESF operations such as reactor trip, main feedwater isolation, and main steam isolation. When a plant equipment operation, for example, an ESF operation, is blocked by the permissive information D223, an operating bypass occurs.

[0017] The plant control device 220 transmits the plant parameter D221, the plant facility information D222, and the permissive information D223, which are plant information, to the information display processing unit 230A and the operation support information generation device 10A.

[0018] Based on the received plant information, the information display processing unit 230A generates drawing data for display on the input / output device 250 and the output device 240, and transmits it to the input / output device 250 and the output device 240. Examples of the output device 240 include display terminals such as large display devices. The input / output device 250 and the output device 240 display the received display data.

[0019] [Operation Support Information Generation Device] The operation support information generation device 10A is composed of an ESF discrimination processing unit 110, a maintenance bypass discrimination processing unit 120, and an operating bypass discrimination processing unit 130A.

[0020] The ESF discrimination processing unit 110 discriminates the operating status of the ESF and equipment trips (hereinafter collectively referred to as ESF), such as non-operation, in-operation, operation completion, and operation abnormality, based on the plant parameter D221. Various ESFs operate triggered by the occurrence of an abnormality in the plant equipment 210 or an abnormality in the plant state. For example, the occurrence of an abnormality in the plant equipment 210 may be considered a pump failure, and an abnormality in the plant state may be considered an abnormal water level of the equipment.

[0021] The plant control device 220 receives the plant parameter D221 from the plant equipment 210. When detecting an abnormality in the plant state, such as an abnormal decrease in the equipment water level exceeding the threshold value, the plant control device 220 operates the ESF necessary to ensure the safety of the plant. Specifically, the plant control device 220 generates an ESF operation signal for the necessary ESF, transmits an equipment operation signal to the plant equipment 210 controlled by each ESF, and operates the plant equipment [0000109] 210. The signal processing in the plant control device 220 is programmed as control logic.

[0022] <ESF discrimination processing unit> As described above, the ESF discrimination processing unit 110 detects the operation of the ESF of the plant parameter D221 outside the plant control device 220 and discriminates the operation status if the ESF is operating. Specifically, it discriminates the presence or absence of the operation of the ESF, and if it is discriminated that the operation is present, it discriminates which of the operation statuses of the ESF is in-operation, operation completion, or operation abnormality.

[0023] Figure 2 shows the processing flow of the ESF determination processing unit 110. For each ESF, one or more plant parameters D221 that affect ESF operation are periodically received (step ST1101), and it is determined whether there are any that meet the criteria for ESF operation, i.e., factors that cause ESF operation (step ST1102). An example of the criteria for ESF operation is when alarm information for an abnormal drop in equipment water level is included in the plant parameter D221, as described above. Alternatively, it may be determined whether each individual plant parameter D221 exceeds the threshold that satisfies the criteria for ESF operation. Or, the determination may be made by operating a logic that comprehensively judges multiple plant parameters D221 using a logic circuit or processor, which will be described later. If there are no plant parameters D221 that satisfy the criteria for ESF operation, the ESF operation status is determined to be "not operating (D1101)".

[0024] If there is a plant parameter D221 that satisfies the criteria for ESF operation, the operating status of one or more plant devices 210 on which the ESF operates is checked. A predetermined amount of time is required for the plant devices 210 to complete their operation. For example, the time it takes for a valve to fully close or fully open, or the time it takes for a pump to start or stop. Therefore, for all plant devices 210 that are subject to the ESF operation, the operating time until completion, i.e., the operation completion time, is defined for each ESF. For example, the time it takes for all valves subject to the ESF operation to close may be defined as 15 seconds.

[0025] In step ST1102, when it is determined that there is a plant parameter D221 that satisfies the criteria for ESF operation, the timer for measuring the operation completion time is started, and it is determined whether or not the operation completion time has elapsed (step ST1103). If the operation completion time has not elapsed, the ESF operation status is determined to be "operating (D1102)". In this case, after the determination result data output described later (step ST1106), the process returns to step ST1103 again to determine whether or not the operation completion time has elapsed (step ST1107).

[0026] When the operation completion time for the plant equipment 210 has elapsed, the ESF determination processing unit 110 requests one or more plant parameters D221 related to the plant equipment targeted by the ESF from the plant control device 220 and receives them (step ST1104). Using the received plant parameters D221, it determines whether all of the plant equipment 210 targeted by the ESF are operating normally (step ST1105). Here, the desired equipment state after the ESF operation is defined for each ESF. For example, valve 1 is in a fully closed state, valve 2 is in a fully closed state, valve 3 is in a fully open state, etc. The received plant parameters D221 of the plant equipment 210 are compared with the desired equipment state after the ESF operation. If the comparison results all match, it is determined that all are operating normally, and the ESF operation status is determined to be "operation complete (D1103)". If even one of the valves is not functioning correctly, for example, if the expected equipment state is valve 1 fully closed, valve 2 fully closed, and valve 3 fully open, but the plant parameter D221 shows valve 1 fully open, valve 2 half-open, and valve 3 fully open, the comparison result of the state of valve 2 will not match, and the ESF operating status will be determined to be "Operational abnormality (D1104)".

[0027] The ESF operating status determination results D110 (D1101~D1104) are transmitted from the ESF determination processing unit 110 to the information display processing unit 230A, and output by the information display processing unit 230A (step ST1106). This ESF operating status determination process is performed for all ESFs.

[0028] <Maintenance bypass discrimination processing unit> The maintenance bypass determination processing unit 120 determines whether a maintenance bypass occurs in each ESF and the type of maintenance bypass that has occurred. Some plant equipment 210 that affect the operation of each ESF, such as instruments like water level gauges, may generate maintenance bypasses. These plant equipment 210s measure multiple channels, for example, four channels of plant values.

[0029] A maintenance bypass refers to a state where one or more channels become unusable due to maintenance or malfunctions. In plant operation, a small number of maintenance bypasses, such as one channel, are often acceptable, considering operation while performing maintenance. However, if more than that, such as two or more channels, are bypassed, the ESF will not function properly, resulting in an abnormal state requiring corrective action from the operator. To provide operators with appropriate information, a process for determining the occurrence of maintenance bypasses is necessary.

[0030] The maintenance bypass determination processing unit 120 determines whether a maintenance bypass has occurred for each plant equipment 210 that may be the cause of operation of the ESF, based on the plant equipment information D222 which indicates whether a maintenance bypass has occurred, in order to output the status of maintenance bypass occurrence to the output device 240. Furthermore, if a maintenance bypass occurs, it determines the type of maintenance bypass, whether it is within the normal range or an abnormality has occurred.

[0031] Figure 3 shows the processing flow of the maintenance bypass determination processing unit 120. First, it periodically requests and receives plant equipment information D222 related to each ESF from the plant control device 220 (step ST1201). Plant equipment information D222 is bypass occurrence information for multiple channels of plant equipment.

[0032] Each ESF contains plant equipment information D222 for zero or more plant devices 210. The following explanation uses the example of two plant devices 210, Instrument 1 and Instrument 2, each with four channels. In this case, the plant equipment information D222 includes maintenance bypass information MD1-1 to MD1-4 for channels 1 to 4 of Instrument 1, and maintenance bypass information MD2-1 to MD2-4 for channels 1 to 4 of Instrument 2. Each maintenance bypass information MD stores 1 if a maintenance bypass has occurred, and 0 if it has not. Furthermore, a maintenance bypass is considered normal if one channel can be bypassed for maintenance or other reasons, while an abnormal state is considered to occur if two or more channels are bypassed for maintenance due to equipment malfunction or other reasons.

[0033] Next, for one of the plant equipment information D222 entries related to the received ESF, it is determined whether or not a maintenance bypass has occurred (step ST1202). For example, when determining for instrument 1, the number of maintenance bypass information entries MD1-1 to MD1-4, which are plant equipment information D222 entries for instrument 1, that are set to 1 is counted. If only maintenance bypass information MD1-1 has a value of 1, the number of maintenance bypasses is 1, meaning that one channel of maintenance bypass has occurred for instrument 1. If maintenance bypass information entries MD1-1 and MD1-2 each have a value of 1, the number of maintenance bypasses is 2, meaning that two or more channels of maintenance bypass have occurred for instrument 1. If any of the values ​​of maintenance bypass information entries MD1-1 to MD1-4 are 0, the number of maintenance bypasses is 0, meaning that no maintenance bypass has occurred for instrument 1. This process is performed for all plant equipment 210 related to the ESF (step ST1203). In other words, in this embodiment, it is also performed for instrument 2.

[0034] Subsequently, it is determined whether there is at least one plant equipment information D222 among all plant equipment information D222 related to ESF in which two or more maintenance bypasses are occurring. If so, it is determined that "two or more maintenance bypasses are occurring (D1201)" (step ST1204).

[0035] If there are no maintenance bypasses for two or more channels, the next step is to determine if there is at least one plant equipment information D222 indicating that a maintenance bypass for one channel is occurring. If there is, it is determined that "a maintenance bypass for one channel is occurring (D1202)" (step ST1205). If no maintenance bypass for one channel is occurring, it is determined that "no maintenance bypass has occurred (D1203)". The maintenance bypass determination result D120 (D1201~D1203) is sent to the information display processing unit 230A (ST1206). The above maintenance bypass determination process is performed for all ESFs.

[0036] <Operating Bypass Discrimination Processing Unit> The operating bypass determination processing unit 130A determines whether or not an operating bypass occurs in each ESF. An operating bypass refers to the blocking of ESF startup by a permissive signal during plant startup or shutdown. Therefore, the operating bypass that prevents the operation of each ESF basically occurs based on the transmission status of permissive information D223. Permissive information D223 is generated and transmitted when the plant parameter D221 reaches a predefined set point.

[0037] Permissive information D223 includes, for example, reaching a set point in reactor output or pressurizer pressure, and is represented by the names of permissive signals such as P-1 and P-2. For example, if plant parameter D221 related to permissive signal P-1 of permissive information D223 is reactor output, and the set point for plant parameter D221 is "10% reactor output", then if the value of reactor output is 10% or more, permissive signal P-1 will be "1", and if it is less than 10%, permissive signal P-1 will be "0". An example of the conditions for operating bypass to occur is when plant parameter D221 is above the set point (permissive signal P-1 is "1") or below the set point (permissive signal P-1 is "0"). In many such cases, when plant parameter D221 satisfies the conditions for operating bypass to occur, operating bypass occurs automatically.

[0038] In this case, some operating bypasses are caused by manual operation by the operator. In this case, the plant control device 220 receives manual block input information transmitted from the input / output device 250 by the operator's operation. Furthermore, if the permissive signal P-1, which is a condition for generating an operating bypass, is "1" or "0", the plant control device 220 determines that this condition is met, and then a manual operating bypass occurs.

[0039] The operating bypass determination processing unit 130A, like the ESF determination processing unit 110 and the maintenance bypass determination processing unit 120, performs a determination process to determine whether or not an operating bypass has occurred in order to display the status of the operating bypass on the output device 240.

[0040] Figure 4 shows the processing flow of the operating bypass determination processing unit 130A, illustrating the case where information about operating bypass caused by manual operation by an operator is determined. First, zero or more permissive information D223 related to ESF operation are periodically received from the plant control device 220. At the same time, plant parameters D221, i.e., one or more manual block signals, which are the processing results of manual block input information received from the input / output device 250, are periodically received (step ST1301).

[0041] Next, it is determined whether or not a manual operating bypass has occurred. If permissive information D223 is included in the determination conditions, it is determined whether permissive information D223 satisfies the operating bypass occurrence conditions AND a manual block signal has been generated (step ST1302). If both conditions are met, it is determined that an operating bypass has occurred.

[0042] For example, if the conditions for manual operating bypass in a certain ESF are that the plant parameter D221 is above the setpoint and a manual block signal is generated, that is, if the value of the permissive signal P-1 in the permissive information D223 is "1" (above the setpoint) and the value of the manual block signal is "1" (generated), then it is determined that "operating bypass occurred (D1301A)". If the permissive information D223 is not included in the determination conditions, the determination is made based on whether or not a manual block signal is generated. If the conditions for generation are not met, it is determined that "operating bypass did not occur (D1302A)".

[0043] The operating bypass determination result D130 (D1301A or D1302A) is transmitted to the information display processing unit 230A (step ST1303). The above operating bypass detection process is performed on all ESFs where operating bypass may occur.

[0044] As described above, the permissive information D223 generates a signal when the plant parameter D221 reaches a preset setpoint. For example, when the plant parameter D221 is greater than or equal to the setpoint, "1" is displayed, and when it is less than the setpoint, "0" is displayed on the output device 240 or the input / output device 250. Therefore, it is also periodically transmitted to the information display processing unit 230A.

[0045] The information display processing unit 230A generates drawing data for displaying operation support information on the output device 240 based on the discrimination result data ESF operation status discrimination result D110, maintenance bypass discrimination result D120, and operating bypass discrimination result D130 output from the ESF discrimination processing unit 110, maintenance bypass discrimination processing unit 120, and operating bypass discrimination processing unit 130A of the operation support device 10, respectively, and further based on the permissive information D223 output from the plant control device 220, and outputs it to the output device 240.

[0046] <Screen display of the output display device> FIG. 5 shows an example of a screen display on the output device 240. In the ESF operation state display 300, the names of each ESF are arranged (for example, 311, 312, 313, 314), and the operation states are displayed (for example, 315, 316). Above the display of each operation state, icons 321 and 322 indicating the occurrence of a maintenance bypass are displayed on the right side, and an icon 331 indicating the occurrence of an operating bypass is displayed on the left side. In addition, in the permissive state display 350, displays indicating each permissive signal (for example, P-1 to P-9) are arranged.

[0047] <ESF operation display> The ESF operation state display will be described. When the information display processing unit 230A receives the ESF operation status discrimination result D110 (D1101 to D1104) from the ESF discrimination processing unit 110, it performs display processing according to the data type. (1) When the ESF is not operating (receiving D1101), drawing data indicating turning off the light is generated, for example, in the colors of the ESF displays 313 and 314. (2) If the ESF is operating (D1102 is received), drawing data is generated that will be displayed in a color (e.g., yellow) that indicates the ESF is operating, as shown in ESF display 311, 312. (3) When the ESF operation is completed (D1103 is received), drawing data is generated to display the ESF in a color that indicates the completion of the operation (e.g., blue), as shown in ESF display 316. (4) If an ESF malfunction occurs (D1104 is received), the system generates drawing data that displays an abnormal color (for example, red, which is the alarm color) as shown in ESF display 318, and flashes for a certain period of time to prompt the operator to take action against the abnormality.

[0048] <Maintenance Bypass Indicator> This section explains the display of maintenance bypasses. When the information display processing unit 230A receives the maintenance bypass determination result D120 (D1201~D1203) from the maintenance bypass determination processing unit 120, it performs display processing according to the data type. (1) If two or more maintenance bypasses occur in the ESF (receive D1201), an icon 322 indicating an abnormality is displayed, and drawing data is generated that flashes for a certain period of time to prompt the operator to take action against the abnormality. (2) If maintenance bypass occurs on only one channel (receive D1202), drawing data is generated that displays icon 321 indicating that a one-channel bypass has occurred, blinking for a certain period of time. (3) If a maintenance bypass has not occurred (D1203 is received), no drawing data is generated (if an icon has already been drawn, a drawing process is performed to erase the icon).

[0049] <Operating Bypass Display> The following describes the display of the operating bypass. When the information display processing unit 230A receives the operating bypass determination result D130 (D1301A or D1302A) from the operating bypass determination processing unit 130A, it performs display processing according to the data type. (1) If an operating bypass occurs in the ESF (D1301A is received), drawing data is generated that displays icon 331 indicating the occurrence of an operating bypass, blinking for a certain period of time. (2) If an operating bypass has not occurred (D1302A is received), no drawing data is generated (if an icon has already been drawn, a drawing process is performed to erase the icon).

[0050] <Permissive information display> The display of permissive information will now be explained. The information display processing unit 230A receives permissive information D223 from the plant control device 220. (1) If the plant parameter D221 is equal to or greater than the set point (for example, the value of the permissive signal P-6 is "1"), drawing data is generated to make the corresponding permissive display 352 of the permissive status display 350 blink for a certain period of time in order to notify the operator. (2) If the plant parameter D221 is less than the set point (for example, if the value of the permissive signal P-6 is "0"), the drawing data for the indicator 351 indicating that the light is off is generated.

[0051] The above-mentioned display methods are merely examples and are not limited to these. Furthermore, the ESF operation display, maintenance bypass display, operating bypass display, and permissive information display may be shown not only on the output device 240 but also on the input / output device 250. In addition to display on a screen, the operating status may also be indicated by sound.

[0052] Furthermore, while the discrimination result data D110 to D130 were explained in the processing flow of Figures 2 to 4 as outputting individual discrimination data (for example, in the case of D110, D1101 to D1104 are output), it is also possible to use only one type of data for each of the discrimination result data D110 to D130, and represent the discrimination result by the difference in their values ​​(for example, value of D1101: 0, value of D1102: 1, value of D1103: 2, value of D1104: 3), and have the information display processing unit 230A process and display this data. Alternatively, this may be implemented using other methods.

[0053] <Effects> (1) According to this embodiment 1, in addition to displaying the operating status of ESFs and equipment trips related to the safety of the nuclear power plant, and information on ESFs and equipment trips affected by maintenance bypass, it also displays information on ESFs and equipment trips whose operation is prevented by operating bypass caused by manual operation by the operator, and further displays permissive information that causes operating bypass, thereby improving each operator's awareness of the status of ESFs and equipment trips in all aspects of plant operation, including normal operation during plant startup and shutdown, as well as in the event of a plant abnormality.

[0054] (2) Furthermore, by making it possible to display the operating bypass generated by operator A's manual operation on an output device that can be simultaneously viewed by multiple operators via a large display, operator A's actions can be shared with the entire operating team. As a result, the entire operating team's situational awareness regarding operator A's actions can be improved, and even if a human error such as operating the wrong object occurs, other operators can immediately notice it and take swift action to restore the plant to the correct state. These effects (1) and (2) can further enhance the safety of nuclear power plant operations.

[0055] Embodiment 2. Embodiment 1 describes a method for implementing a plant operation support system that includes an operating bypass determination processing unit 130A that determines whether or not an operating bypass occurs that prevents ESF operation due to manual operation by an operator, and an information display processing unit 230A that displays the operating bypass that occurred due to manual operation.

[0056] As described in Embodiment 1, operating bypasses include those that are automatically generated in response to permissive information. During plant operation, especially during startup or shutdown, the value of the permissive signal corresponding to the status of reaching the setpoint of plant parameters as plant operation progresses is an important indicator of the progress of plant operation. Operating bypasses that are automatically generated based on these permissive signals also provide information that improves the operating team's awareness of the plant equipment operating status in accordance with the plant operation status. For this reason, it is desirable that not only operating bypasses caused by manual operation by operators, but also automatically generated operating bypasses can be displayed on output devices such as large display devices.

[0057] Here, we will explain the conditions for the occurrence of automatically generated operating bypasses. As an example of ESF and equipment trip, we will give the conditions and behavior for reactor trip prevention, i.e., the occurrence of operating bypass for reactor trips. For example, when the permissive signal P-1 becomes "1", the reactor trip due to factor 1 is prevented. ru, If the permissive signal P-1 becomes "0", a reactor trip due to factor 2 is prevented. ru, If the permissive signal P-2 becomes "1", the reactor trip caused by factor 3 is prevented. ru, These are some examples.

[0058] Here, the operating bypass conditions for reactor trips involving the permissive signal P-1 include both permissive signal P-1 being "1" and permissive signal P-1 being "0". Therefore, if we were to repurpose the determination process of the operating bypass determination processing unit in the plant operation support system of Embodiment 1 for determining automatically occurring operating bypasses, in other words, if we were to use the operating bypass occurrence conditions as the determination conditions and remove the conditions for manual block input information to determine automatically occurring operating bypasses, the icon indicating an operating bypass would be displayed on the output device at all times, rendering the display meaningless.

[0059] Embodiment 2 solves these problems and describes a method for obtaining an operation support system that, in addition to determining operating bypasses by manual operation, determines the occurrence of operating bypasses that are particularly important during plant operation among the automatically occurring operating bypasses, and displays the occurrence status on an output device.

[0060] Embodiment 2 describes the following two methods. (1) A method for assigning a priority order to manually operated and automatically generated operating bypasses to be displayed, and for displaying the highest priority operating bypass. (2) A method for displaying an operating bypass appropriate to the plant progress by having an operator select and input appropriate discrimination priority data from a dataset of discrimination priority settings for operating bypasses prepared for each plant operation procedure, such as startup procedure, shutdown procedure, and abnormal response procedure.

[0061] Figure 6 shows a block diagram of the nuclear power plant operation support system in Embodiment 2. It consists of a plant monitoring and control device 20B and an operation support information generation device 10B. In addition to the plant equipment 210, input / output device 250, and output device 240 of Embodiment 1, the plant monitoring and control device 20B includes an information display processing unit 230B that generates drawing data for operating bypass display icons according to discrimination priority or display priority.

[0062] Furthermore, the operation support information generation device 10B comprises, in addition to the ESF discrimination processing unit 110 and maintenance bypass discrimination processing unit 120 of Embodiment 1, a discrimination condition database (hereinafter referred to as DB) 140A that stores discrimination condition data for the operating bypass to be displayed, a discrimination condition input / output device 150 which is an interface for an operator to select discrimination priority data according to the plant progress from one or more discrimination priority datasets, which are a type of discrimination condition data registered in the discrimination condition DB 140A, and input it to the operating bypass discrimination processing unit 130B, and an operating bypass discrimination processing unit 130B that reads the discrimination condition data selected by the discrimination condition input / output device 150 from the discrimination condition DB 140A, selects the operating bypass to be displayed on the output device 240 based on the discrimination condition data (discrimination priority data), and transmits it to the information display processing unit 230B.

[0063] Next, we will explain the method described above, "(1) assigning a priority order to the operating bypasses to be displayed and displaying the highest priority operating bypass." An example of the discrimination criteria DB140A is shown in Figure 7. The discrimination criteria DB140A stores the following data (a) to (f). (a) ESF / Trip Name 1401: The name of the ESF and various trips (hereinafter collectively referred to as ESF). (i) ID1402: I for uniquely distinguishing the operating bypass that occurs. D ( (c) Operating bypass name 1403. (e) Bypass type 1404: Indicates whether the operating bypass occurs automatically or manually. For example, automatic occurrence is stored as "Automatic", and occurrence by manual operation is stored as "Manual". (e) Bypass condition 1405: Indicates the conditions under which operating bypass occurs. (k) Discrimination priority 1406A: Indicates the display priority of the operating bypass and is set for each ESF.

[0064] The discrimination priority 1406A assigns unique numbers in ascending order of priority to the operating bypasses to be displayed on the output device 240, starting with 1, then 2, and so on. The highest priority is assigned the number 1. For items that are not to be displayed on the output device 240, "-" is entered.

[0065] The operating bypass discrimination processing unit 130B performs an operating bypass discrimination based on the discrimination priority 1406A data described in the discrimination condition DB 140A, taking into account the priority to be displayed. Figure 8 shows the processing steps of the operating bypass discrimination processing unit 130B in Embodiment 2.

[0066] Step ST1301, which relates to data acquisition, is the same as in Embodiment 1. Next, the occurrence status of operating bypass generated by manual operation and automatically generated operating bypass is determined for each ESF (step ST1302A). Operating bypass generated by manual operation is the same as in Embodiment 1. Operating bypass generated by automatic operation is determined using permissive information D223, which is the occurrence condition. For example, if the occurrence condition for automatically generated operating bypass for a certain ESF is "greater than or equal to the set point of plant parameter D221", the value of the permissive signal P-1 is set to "1", and it is determined that "operating bypass is occurring".

[0067] If the ESF has multiple operating bypass conditions, step if even one of them is met ST The process will proceed to 1302B. If the conditions are not met, the message "Operating bypass not displayed (D1302B)" will appear.

[0068] Next, the determination conditions DB140A is referenced, and the ID 1402 of the target where an operating bypass is occurring is determined by matching it with, for example, the bypass condition 1405, and the determination priority is referenced (step ST1302B). If there is an operating bypass among the currently occurring operating bypasses that has a determination priority 1406A set, the ID 1402 of the operating bypass with the highest determination priority 1406A among them is determined as determination result data D1301B (step ST1302C) and output to the information display processing unit 230B (step ST1303).

[0069] For example, in Figure 7, when determining an operating bypass related to a reactor trip, if the permissive information D223 satisfies the conditions that permissive signal P-2 is "1" and permissive signal P-3 is "0", and also satisfies the manual block operation signal "XXXX=1", that is, if "1-3" and "1-6" among ID 1402 satisfy the conditions, then the occurrence of an operating bypass for ID "1-6", which has the highest discrimination priority 1406A of "1", will be displayed preferentially. If the discrimination priority 1406A for all operating bypasses is "-" in step ST1302B, the signal is sent to the information display processing unit 230B as "No operating bypass displayed (D1302B)".

[0070] When the information display processing unit 230B receives data ID 1402 as D1301B, it generates drawing data to display an icon indicating an operating bypass, which blinks for a certain period of time. When a new operating bypass occurs, similar to Embodiment 1, upon receiving data D1302B, it generates drawing data to erase the operating bypass icon.

[0071] <Effects> Through the above process, even for automatically occurring operating bypasses, the output device 240 can be used to output information about those instances where it is important to be notified during operation, further improving the operating team's situational awareness.

[0072] Next, we will explain the method described above for "(2) a method in which an operator selects and inputs the appropriate discrimination priority data for the plant progress from the discrimination priority dataset for the operating bypass prepared for each plant operation procedure, and displays the appropriate operating bypass for the plant progress."

[0073] Figure 9 shows the data of the discrimination condition DB140A, which stores discrimination priority 1406B for each operating procedure. Discrimination priority 1406B stores discrimination priority data for each operating procedure, such as startup procedure, shutdown procedure, and XX abnormality procedure, and each procedure is uniquely assigned a procedure ID. In the example in Figure 9, that is, IDs A to C.

[0074] The discrimination condition input / output device 150 is an input / output interface for the operator to select the procedure ID of the applicable discrimination priority 1406B and instruct the operating bypass discrimination processing unit 130B. The screen of the discrimination condition input / output device 150 displays the contents of the discrimination condition DB shown in Figure 9, and allows the operator to select one procedure ID of the applicable discrimination priority 1406B using radio buttons or the like. When the operator selects and inputs the procedure ID of a procedure that is in progress or is about to be performed, that procedure ID is sent to the operating bypass discrimination processing unit 130B, and in step ST1302B of the operating bypass discrimination processing unit 130B, discrimination processing is performed based on the discrimination priority 1406B associated with the transmitted procedure ID. For example, if the operator selects the startup procedure, i.e., the discrimination priority 1406B with "Procedure ID: A", through the discrimination condition input / output device 150, the operating bypass discrimination processing unit 130B performs operating bypass discrimination processing based on that priority data.

[0075] <Effects> According to the method described above, it becomes possible to apply appropriate discrimination priorities for each stage of operation, thereby enabling the display of operating bypasses according to the progress of the operation. As a result, more appropriate information can be provided to operators, further improving the safety of plant operations.

[0076] Furthermore, the operating bypass discrimination processing unit 130B determines the operating bypass with the highest discrimination priority in step ST1302C. At this time, it outputs "automatic" or "manual" data indicating the bypass type 1404 along with the operating bypass display target ID 1402 as discrimination result data D1301B. The information display processing unit 230B that receives this data may then display different icons according to the bypass type 1404, so as to distinguish whether the generated operating bypass was automatically generated or manually operated.

[0077] Furthermore, the discrimination condition DB140A and the information display processing unit 230B may also handle data related to the importance of the operating bypass. For example, for each operating bypass for each ESF in the discrimination condition DB140A, importance data, such as Class 1, Class 2, and Class 3 in descending order of importance, may be assigned, and this importance data may also be output as discrimination result data D1301B. The information display processing unit 230B that receives this data may display the occurrence of the operating bypass using different colors or icons according to its importance, thereby communicating the importance of the operating bypass to the operator.

[0078] Furthermore, although the output device 240 can only display information about one operating bypass occurrence per ESF at any given time, a list of information regarding the occurring operating bypasses, such as the operating bypass name 1403, bypass type 1404, bypass condition 1405, and occurrence status (occurred, not occurred), may be displayed on a separate display, the input / output device 250. Furthermore, the processing methods described above are merely examples, and other methods may be used to implement the same results.

[0079] The plant control device 220 and operation support information generation devices 10A and 10B according to these embodiments 1 and 2 consist of a processor 50 and a storage device 60, as shown in Figure 10 as an example of the hardware. Although not shown, the storage device 60 includes a volatile storage device such as random access memory and a non-volatile auxiliary storage device such as flash memory. Alternatively, a hard disk may be provided as an auxiliary storage device instead of flash memory. The processor 50 may include a CPU (Central Processing Unit), ASIC (Application Specific Integrated Circuit), IC (Integrated Circuit), FPGA (Field Programmable Gate Array), various logic circuits, and various signal processing circuits. Furthermore, multiple processors of the same or different types may be provided as the processor 50, and each process may be performed separately.

[0080] The processor 50 executes the program input from the storage device 60. In this case, the program is input to the processor 50 from the auxiliary storage device via the volatile storage device. The processor 50 may also output data such as calculation results to the volatile storage device of the storage device 60, or it may save the data to the auxiliary storage device via the volatile storage device. The discrimination condition DB may also be stored in the storage device 60.

[0081] Although this application describes various exemplary embodiments and examples, the various features, aspects, and functions described in one or more embodiments are not limited to the application of a particular embodiment, but can be applied individually or in various combinations to the embodiments. Accordingly, countless variations not illustrated are conceivable within the scope of the technology disclosed herein. These include, for example, modifications, additions, or omissions of at least one component, as well as the extraction of at least one component and its combination with components of other embodiments. [Explanation of Symbols]

[0082] 10A, 10B: Operation support information generation device; 20A, 20B: Plant monitoring and control device; 50: Processor; 60: Memory device; 110: ESF discrimination processing unit; 120: Maintenance bypass discrimination processing unit; 130A, 130B: Operation bypass discrimination processing unit; 140A: Discrimination condition DB; 150: Discrimination condition input / output device; 210: Plant equipment; 220: Plant control device; 230A, 230B: Information display processing unit; 240: Output device; 250: Input / output device.

Claims

1. A plant operation support system comprising a plant monitoring and control device and an operation support information generation device, The aforementioned plant monitoring and control device is The equipment that makes up the plant, A plant control device that outputs plant parameter information and plant equipment information, which are plant information acquired from the plant equipment, and permissive information generated based on the plant parameter information, to the operation support information generation device. An input device for providing operation control input to the plant control device, An information display processing unit that performs processing for displaying the signals generated by the aforementioned driving support information generation device on an output device, Equipped with, The aforementioned driving support information generation device is An engineering safety facility determination processing unit that determines the operating status of engineering safety facilities related to the safety of the plant based on the plant parameter information and transmits the determination result to the information display processing unit, A maintenance bypass determination processing unit determines whether or not a maintenance bypass has occurred in the engineering safety facility based on the plant equipment information and transmits the determination result to the information display processing unit, An operating bypass determination processing unit determines whether or not an operating bypass has occurred that prevents the operation of the engineering safety facility based on the permissive information, and transmits this information to the information display processing unit, A plant operation support system comprising the following features, wherein the output device displays the operating status of the engineering safety facility, the presence or absence of the maintenance bypass, and the presence or absence of the operating bypass, so that they can be visually observed.

2. The plant operation support system according to claim 1, characterized in that the operation support information generation device comprises an ID assigned to the operating bypass and a discrimination condition database that stores the priority of the operating bypass to be displayed preferentially to the output device, and an operating bypass discrimination processing unit that selects the highest priority operating bypass and preferentially displays to the output device whether or not the selected operating bypass is occurring.

3. The plant operation support system according to claim 2, characterized in that the priority is set for each operating procedure of the plant of the operating bypass.

4. The plant operation support system according to any one of claims 1 to 3, characterized in that the display of the output device displays whether or not the maintenance bypass occurs, whether or not the operating bypass occurs, as well as the importance of the maintenance bypass and the importance of the operating bypass.

5. The plant operation support system according to any one of claims 1 to 3, characterized in that the operating bypass includes both a manually operated operating bypass that occurs based on the input of both the permissive information and the plant parameter information manual block signals, and an operating bypass that occurs automatically based on the permissive information.

6. The plant operation support system according to any one of claims 1 to 3, characterized in that the operating status of the engineering safety facility, the presence or absence of the maintenance bypass, and the presence or absence of the operating bypass can each be visually observed on a single screen.

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