JP6720478B2 - Nuclear power plant alarm monitoring support system - Google Patents

Description

The present invention relates to a plant alarm monitoring support system for a nuclear power plant.

The operators of the duty duty duties monitor the various instruments while the nuclear power plant is operating. When an abnormality or transient event occurs in the nuclear power plant equipment and an alarm is issued, the operator confirms the alarm, confirms the relevant parameters of the main control room, confirms the operation status of the equipment, confirms the situation of the site, and confirms the site parameters. It is necessary to check and confirm whether there is a conflict with the security regulations, check the procedure when an alarm is issued, and take appropriate action, as well as a number of checks, reports, and operations in a short time.
The operator confirms the plant parameter by directly confirming it on the control panel or by looking for it on the display screen of the operation monitoring or control computer installed in the central control room.
The layout of the screen for confirming the control panel and related parameters has been decided in advance, and when the necessary data is diverse, the operator reciprocates the control panel and circulates a number of screens for confirmation.
In addition, it is necessary for the operator to comprehensively determine the cause of the trouble event based on the issued alarm and the fluctuation of the parameter. Further, as for the response after the alarm is issued, it is necessary to confirm it by using a paper-based manual when the alarm is issued, and thus it takes time to search for it.
Skilled operators comprehensively judge and respond to alarm confirmation and response operations, so the ability of the operators had a great influence.
Therefore, systems have been developed so far that support the handling measures by operators.

For example, in Patent Document 1, knowledge (information) about the relationship between a cause event that causes an alarm during abnormal operation of a plant and an alarm, an operating state of a device, or a process signal, under the name of “system for abnormal plant operation support” While providing the above, there is disclosed a system for determining a cause of an alarm by collating a plant signal such as an alarm, a device status signal, and a process signal with a plant signal status for each event in the knowledge database.

In addition, Patent Document 2 discloses a technique under the name of "abnormal operation driving support system and display method thereof" for showing an abnormal operation procedure manual, a system drawing, and a trend graph of a plant for an abnormality that has occurred in the plant. ing.

Further, in Patent Document 3, by the name of “alarm processing device and alarm processing method”, alarm data of a power plant is connected (causal relationship) between alarms to cause a warning, A technique for constructing an alarm database for resulting alarms and making it searchable is disclosed.

In Patent Document 4, as a "power plant operation management support device", an instruction to issue an alarm is issued when it is determined that there is an abnormality by comparing plant data with a preset alarm threshold, and a safety regulation is related. An apparatus for extracting and displaying conflicting security regulation information from a security regulation storage unit that stores information is disclosed. Further, in this device, it is possible to perform the allowable standby exclusion time (AOT) defined by the security regulations together with the timer display.

Further, in Patent Document 5, a name of “man-machine interface device” is provided and means for displaying support information at the time of an accident for an operator to grasp the plant status, and a procedure for taking an alarm when a single alarm is issued. An apparatus including a means for displaying, a means for displaying a system diagram, and a means for displaying parameters (operation information) deviating from the normal time is disclosed.

JP-A-3-92799 JP-A-7-191188 JP, 2011-154456, A JP2012-128674A JP, 10-160894, A

However, in the technology disclosed in Patent Document 1, there is a disclosure of technology that provides knowledge (information) about the relationship between a causal event related to an alarm and an alarm or the operating state of a device or a process signal, and collates with an actual process signal. However, since the collation judgment is executed in the system and only the result is transmitted to the operator, the operator himself/herself can grasp the operation state of the plant and identify the cause of the alarm based on experience. There was a problem that information was insufficient to make an inference about a ripple event.
Patent Document 2 discloses a technique for displaying an abnormal operation procedure manual, a system diagram, and a plant trend graph for an abnormality that occurs in a plant. In Patent Document 3, alarm data is linked between alarms (causal relationship ), the alarm database for the cause alarms that cause the alarms and the resulting alarms resulting from the alarms is built, but the information on the operating parameters (operating process amount) that is the basis for generating those alarms is lacking. Therefore, there is a problem that it is difficult for operators to grasp the numerical values of instruments during a transient event or an accident, and to promptly respond while assuming the cause of the alarm and the subsequent ripple event.
Further, in Patent Document 4, a technology for displaying security regulation information in response to an alarm issuance and further displaying an allowable standby exclusion time (AOT) defined by the security regulation together with a timer display, and in Patent Literature 5, a technology in the event of an accident. Although a technology is disclosed that includes support information, alarm processing procedures, a system diagram, and means for displaying parameters (operation information) that deviate from normal times, the cause of the alarm to be referred when the alarm is issued and the subsequent There is no disclosure of means for providing information on operating parameters (operating process amount) necessary for determining treatment, and operators can take appropriate action while quickly grasping the plant operating state correctly in a short time. There was a problem that it was difficult to do.

The present invention has been made in response to such conventional circumstances, starting with an alarm issued at the time of a transient event or an accident of a nuclear power plant, as an operation parameter related to the cause of the alarm, as a result of the alarm. The operator can grasp the operating status of the plant by forming a hierarchical structure into a database of the related operation parameters and the alarms related to the operation parameters as a result of the alarm and displaying a list for each hierarchy. However, for the purpose of providing a nuclear power plant alarm monitoring support system that enables operators to identify the cause of a warning at the time of a transient event or an accident, predict the subsequent ripple event, and make countermeasures themselves. There is.

In order to achieve the above object, the nuclear power plant alarm monitoring support system according to the invention of claim 1 monitors the alarm issued at the time of a transient event or an accident of the nuclear power plant, and at the time of issuing the alarm, A nuclear power plant alarm monitoring support system that assists operators of a nuclear power plant in determining the cause of a transient event or accident and the possible consequent consequent consequent event, which is installed in the nuclear power plant. Operating status monitoring unit that acquires and monitors data related to operating status from a device, and the alarm when a transient event or accident in which the operating status data acquired by the operating status monitoring unit exceeds a preset setting range. An alarm issuing unit for issuing the alarm, an output unit for displaying the alarm issued by the alarm issuing unit as screen information, and (1) an operation parameter related to the cause of the alarm (2) ) Related parameters/alarm expansion unit that displays the related operation parameter (second operation parameter) as a result of the alarm and (3) the related alarm (second alarm) as a result of the alarm as screen information on the output unit And (1) operation parameters related to the cause of the alarm, (2) operation parameters related to the result of the alarm (second operation parameter), and (3) alarm related to the result of the alarm (second alarm). ) Is stored in a hierarchical structure with the alarm sandwiched therebetween, and an alarm/parameter database.

In the nuclear power plant alarm monitoring support system configured as described above, in the alarm/parameter database, (1) operation parameters related to the cause of the alarm, (2) operation parameters related to the result of the alarm (second operation parameter), and (3 ) By storing the related alarm (second alarm) as a result of the alarm, the related parameter/alarm expansion unit relates to the cause of the alarm in order to identify the cause of the alarm, starting with the generated alarm. Operates to display a list of operating parameters.
Moreover, in order to understand the progress of the ripple event as a result of the initial warning (cause alarm) and to predict the warning as a result of the ripple event, the related parameter/warning expansion unit is set as a result of the initial warning. And a list of warnings related to the driving parameter specified from the list of related driving parameters as a result of the warning.
In the present application, the operating parameter is a variable of a physical quantity generated by the operation of a nuclear power plant, and specifically, changes in flow rate, temperature, pressure, differential pressure, radiation dose, etc. in pipes, containers or equipment. Meanwhile, it means a measurable process amount.
In the embodiments of the present specification, (1) the operation parameter related to the cause of the alarm is the alarm related parameter (cause), and (2) the operation parameter related as the result of the alarm (the second operation parameter) is related to the alarm. The parameter (result) and (3) the related alarm (second alarm) as a result of the alarm may be expressed as an alarm-related alarm (result).

The nuclear power plant warning monitoring support system according to a second aspect of the present invention is the nuclear power plant warning monitoring support system according to the first aspect, which is a parameter calculation process for performing a calculation process using the data regarding the operating state. The parameter calculation processing unit performs past and future time series trend calculation based on the performance of the operation parameter of the device, and the screen information includes the time series trend calculation result. It is a thing.

In the nuclear power plant alarm monitoring support system configured as described above, the parameter calculation processing unit operates so as to perform past and future time series trend calculation based on the actual results of the operation parameters of the device and include the time series trend calculation result in the screen information. To do.

The nuclear power plant warning monitoring support system according to the invention of claim 3 is the nuclear power plant warning monitoring support system according to claim 2, wherein the parameter calculation processing unit uses the time series trend calculation result. Thus, it is possible to perform a time calculation until an interlock is activated or an alarm is issued related to the device, and the screen information includes the time calculation result.

In the nuclear power plant alarm monitoring support system configured as described above, in addition to the function of the invention described in claim 2, the parameter calculation processing unit uses the result of time-series trend calculation to activate or alarm an interlock related to the device. It operates to calculate the time until the alarm is issued and to include the time calculation result in the screen information.

Further, the nuclear power plant alarm monitoring support system according to the invention of claim 4 is the nuclear power plant alarm monitoring support system according to any one of claims 1 to 3, wherein the nuclear power plant system is a system. Database for storing at least one of a pipe instrumentation diagram (hereinafter referred to as P&ID), a system operation manual and a safety regulation, and at least the P&ID, the operation manual and the safety regulation at the request of the operator. It is characterized by having an output instructing unit for reading one from the database and displaying it on the output unit.

In the nuclear power plant alarm monitoring support system configured as described above, in addition to the actions of the invention described in claims 1 to 3, the output instructing unit provides the operator with a P&ID, an operating manual, and a safety regulation concerning the system of the nuclear power plant. It acts so that it is displayed when requested.

The nuclear power plant alarm monitoring support system according to claim 5 is the nuclear power plant alarm monitoring support system according to any one of claims 1 to 4, wherein the screen information is predetermined. The reduced display of the essential information and the detailed display including other supplementary information are selectably displayed on the output unit.
In the nuclear power plant alarm monitoring support system having the above configuration, the screen information is displayed so as to be selectable between the reduced display and the detailed display on the output unit.

A nuclear power plant alarm monitoring support system according to claim 6 is the nuclear power plant alarm monitoring support system according to any one of claims 1 to 5, wherein the alarm and the alarm are related as a result. The screen information regarding the alarm (second alarm) to be activated is classified and displayed in different colors when the alarm is issued, when the alarm is continued, when the alarm is canceled or when the alarm is not issued.
In the nuclear power plant alarm monitoring support system having the above configuration, the screen information is classified and displayed in different colors.

The nuclear power plant alarm monitoring support system according to the invention of claim 7 is the nuclear power plant alarm monitoring support system according to any one of claims 1 to 6, wherein the alarm, (1) The screen information on the operation parameter related to the cause of the alarm, (2) the operation parameter related to the result of the alarm (second operation parameter), and (3) the alarm related to the result of the alarm (second alarm). Is displayed in different colors.
In the nuclear power plant alarm monitoring support system configured as described above, an initial alarm (cause alarm), operating parameters related to the cause of the initial alarm, operating parameters related to the result of the initial alarm (second operating parameter) and an alarm ( The screen information regarding the second alarm) is classified and displayed in different colors.

In the nuclear power plant alarm monitoring support system according to claim 1 of the present invention, the related parameter/alarm expansion unit sets the operation parameter related to the cause of the alarm in order to identify the cause of the alarm with the generated alarm as a starting point. In order to display a list, to grasp the progress of the ripple event as a result of the alarm, or to predict the alert as a result of the ripple event, display a list of relevant operating parameters as a result of the alarm, and further By displaying the list, the operator of the nuclear power plant identifies the cause of the alarm that occurred initially, and predicts the transition of operating parameters due to the progress of events that are thought to spread afterwards, and is notified by the progress of the spread event. It is possible to anticipate possible alerts.

In the nuclear power plant alarm monitoring support system according to claim 2 of the present invention, in addition to the effect of the invention according to claim 1, the screen information includes a time-series trend calculation result based on the actual results of operating parameters of the equipment. Therefore, the operator can read the change of the operation parameter related to the alarm, and can improve the accuracy of the identification of the cause and the prediction of the ripple event.

In the nuclear power plant alarm monitoring support system according to claim 3 of the present invention, in addition to the effect of the invention according to claim 1 or 2, the time until the interlock is activated or the alarm is issued related to the equipment. Since the operator can grasp and refer to the calculation result, it becomes easy to judge which spillover event the alarm is about to come to, and it is possible to quickly take countermeasures against the spillover event.

In the nuclear power plant alarm monitoring support system according to claim 4 of the present invention, in addition to the effects of the inventions according to claims 1 to 3, a P&ID, an operating manual, and a safety regulation regarding the system of the nuclear power plant are displayed. Therefore, the operator can refer to the arrangement and instrumentation of the equipment and measuring instruments on the system piping, the operation method, and the safety regulations, and the transient event or accident event that is causing the alarm. It is possible to more accurately execute the prediction of changes in operating parameters due to the identification of the cause of the above and the progress of events that are thought to spread thereafter, and the prediction of warnings that may be issued due to the progress of the spread events. ..

In the nuclear power plant alarm monitoring support system according to claim 5 of the present invention, since the screen display is displayed on the output section so as to be selectable between the reduced display and the detailed display, the operator must give importance to it. It is possible to effectively use the limited screen space by displaying the details of the alarms and the driving parameters and displaying the details other than the above. Therefore, the cause of the alarm and the prediction of the subsequent ripple event can be efficiently and promptly performed.

In the nuclear power plant alarm monitoring support system according to claim 6 and claim 7 of the present invention, the screen information is categorized and color-coded to increase the visibility by the operator and prevent misunderstandings and erroneous judgments. It is possible to make highly accurate judgments.

It is a conceptual diagram showing the structure of the nuclear power plant warning monitoring support system which concerns on embodiment of this invention. It is a conceptual diagram which shows the operating state database of the nuclear power plant alert monitoring support system which concerns on embodiment of this invention. It is a conceptual diagram which shows the warning/parameter database of the nuclear power plant warning monitoring support system which concerns on embodiment of this invention. It is a conceptual diagram which shows the screen information database of the nuclear power plant warning monitoring support system which concerns on embodiment of this invention. (A) is a conceptual diagram showing a P&ID database of a nuclear power plant alarm monitoring support system according to an embodiment of the present invention, (b) is a conceptual diagram showing a manual database, and (c) is the same invention. 2 is a conceptual diagram showing a safety regulation database of the nuclear power plant alarm monitoring support system according to the embodiment of FIG. It is a flowchart regarding the alarm and related parameter display processing executed by the nuclear power plant alarm monitoring support system according to the embodiment of the present invention. (A) is a conceptual diagram of a detailed display example of a screen display regarding an alarm of the nuclear power plant alarm monitoring support system according to the embodiment of the present invention, and (b) is a conceptual diagram of the same reduced display example. FIG. 8 is a flow chart regarding various displays included in the detailed display example of the screen display regarding the alarm shown in FIG. 7. FIG. 8 is a flow chart regarding various displays included in the detailed display example of the screen display regarding the alarm shown in FIG. 7. FIG. 8 is a flow chart regarding various displays included in the detailed display example of the screen display regarding the alarm shown in FIG. 7. FIG. 8 is a flow chart regarding various displays included in the detailed display example of the screen display regarding the alarm shown in FIG. 7. FIG. 8 is a flow chart regarding various displays included in the detailed display example of the screen display regarding the alarm shown in FIG. 7. It is a conceptual diagram of the screen display regarding the alarm of the nuclear power plant alarm monitoring support system which concerns on embodiment of this invention. It is a conceptual diagram of the screen display regarding the alarm of the nuclear power plant alarm monitoring support system which concerns on embodiment of this invention. It is a conceptual diagram of the screen display regarding the alarm of the nuclear power plant alarm monitoring support system which concerns on embodiment of this invention. It is a conceptual diagram of the screen display regarding the alarm of the nuclear power plant alarm monitoring support system which concerns on embodiment of this invention. (A) is a conceptual diagram of a detailed display example of a screen display regarding an alarm of the nuclear power plant alarm monitoring support system according to the embodiment of the present invention, and (b) is a conceptual diagram of the same reduced display example. It is a conceptual diagram which shows the causal relationship between the alarm of a control rod drive system (CRD system) of a nuclear power plant, and a related parameter. FIG. 18 is a flowchart showing various displays included in the detailed display example of the screen display regarding the alarm shown in FIG. (A) is a conceptual diagram of a detailed display example of a screen display regarding an alarm of the nuclear power plant alarm monitoring support system according to the embodiment of the present invention, and (b) is a conceptual diagram of the same reduced display example. FIG. 21 is a flowchart showing various displays included in the detailed display example of the screen display regarding the alarm shown in FIG. 20( a ). It is a conceptual diagram of the detailed display example of the screen display regarding the alarm of the nuclear power plant alarm monitoring support system according to the embodiment of the present invention. FIG. 23 is a flow chart regarding various displays included in the detailed display example of the screen display regarding the alarm shown in FIG. 22. It is a conceptual diagram which shows the example of a screen display for accident event selection of the nuclear power plant alert monitoring assistance system which concerns on embodiment of this invention. It is a conceptual diagram which shows the example of a screen display for the accident event classification selection of the nuclear power plant alert monitoring assistance system which concerns on embodiment of this invention. It is a conceptual diagram which shows the screen display example of the parameter and the alarm relevant to the accident event selected in the nuclear power plant warning monitoring support system which concerns on embodiment of this invention. It is a flowchart of the alarm warning process at the time of the nuclear power plant alarm monitoring support system which concerns on embodiment of this invention. It is a conceptual diagram which shows the example of a screen display at the time of system management of the nuclear power plant alert monitoring assistance system which concerns on embodiment of this invention. It is a conceptual diagram which shows the example of a screen display regarding the alarm group setting at the time of system management of the nuclear power plant alarm monitoring support system which concerns on embodiment of this invention. It is a conceptual diagram which shows the example of a screen display regarding the accident event group setting at the time of system management of the nuclear power plant alert monitoring assistance system which concerns on embodiment of this invention. It is a conceptual diagram which shows the example of a screen display regarding the alarm addition setting at the time of system management of the nuclear power plant alarm monitoring support system which concerns on embodiment of this invention. It is a conceptual diagram which shows the example of a screen display regarding the alarm deletion setting at the time of system management of the nuclear power plant alarm monitoring support system which concerns on embodiment of this invention.

A nuclear power plant alarm monitoring support system according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 32.
First, a nuclear power plant alarm monitoring support system according to an embodiment will be described with reference to FIGS. 1 to 5.
FIG. 1 is a conceptual diagram showing the configuration of a nuclear power plant alarm monitoring support system according to an embodiment of the present invention. 2 to 5 are concepts showing an operating state database, an alarm/parameter database, a screen information database, a P&ID database, a manual database, and a safety regulation database of the nuclear power plant alarm monitoring support system according to the embodiment of the present invention. It is a figure.
In FIG. 1, the nuclear power plant alarm monitoring support system 1 includes an operating unit database 5, an alarm/parameter database 6, a screen information database 7, a P&ID database 8, as an input unit 2, an arithmetic unit 3, an output unit 4 and a database group. It is composed of a manual database 9 and a security regulation database 10.

The input unit 2 inputs the data 20 that is readablely stored in each database of the nuclear power plant warning monitoring support system 1.
Specific examples of the input unit 2 include reception of data from a keyboard, a mouse, a pen tablet, an optical reading device or an analyzing device such as a computer, measuring equipment in a nuclear power plant, a control panel, or the like via a communication line. It is conceivable that there is a single device or a plurality of types of devices such as devices, which can be used properly according to the purpose. It may also be an interface for input to the nuclear power plant alarm monitoring support system 1.
Further, the output unit 4 includes an operation state monitoring unit 11, an alarm reporting unit 12, a parameter calculation processing unit 13, an output instructing unit 14, a related parameter/alarm expanding unit 15, an accident event selecting unit 16, which are included in the calculating unit 3. An input screen (interface) for outputting and displaying the results of the respective processing contents executed by the alarm screen selection unit 17 and the system management unit 18 and for prompting the data input required for the respective processes executed in the arithmetic unit 3. Information such as a screen) and contents of the data 20 input via the input unit 2 are read out from the databases 5 to 10 and output to the outside.
Specifically, a CRT installed in a nuclear power plant, a display device using liquid crystal, plasma or organic EL, an output device such as a printer, and a transmitter such as a transmitter for transmission to an external device. Is possible. Of course, it may be like an interface to an output for transmission to an external device.

As described above, the calculation unit 3 includes the operating state monitoring unit 11, the alarm reporting unit 12, the parameter calculation processing unit 13, the output instructing unit 14, the related parameter/alarm expanding unit 15, the accident event selecting unit 16, and the alarm screen selecting unit. It is composed of 17 and a system management unit 18.

The operating state database 5 stores data relating to operating parameters (operating process amount) capable of quantitatively expressing the operating states of devices and equipment that make up a nuclear power plant.
Specific contents of the shape data 15 are, for example, flow rate data 21 regarding the fluid flowing in the piping shown in FIG. 2, temperature data 22 regarding the fluid, pressure data 23 such as suction pressure and discharge pressure of the pumps constituting the system. , Differential pressure data 24 such as pressure loss difference of filters and strainers, liquid level data 25 of stored liquid in the tank, neutron flux in the reactor core and radiation data 26 measured by a radiation monitor in a controlled area, There are equipment on/off data 27 and the like indicating the operating status of equipment on the system.

The alarm/parameter database 6 is first classified into four databases: an A alarm database 30, a B alarm database 31, a C alarm database 32, and a D alarm database 33. A to D are added for the sake of convenience, and have no special meaning.
The A alarm is a parameter type alarm, the B alarm is a field control panel type alarm, the C alarm is a trip type alarm of an electric device such as an electric valve or an electric motor, and the D alarm is an event ( (Event) Occurrence type alarm. Details of these alarms will be described later.

The A alarm database 30 stores A1 alarm data 34 classified as A alarms, and for the A1 alarm data 34, an A1 alarm related parameter (cause) 36, an A1 alarm related parameter (result) 37, and An A1 alarm related alarm (result) 38 is associated and stored. The A1 alarm data 34 is an alarm that may occur in a nuclear power plant, and a parameter that may cause the alarm to be issued is stored as an A1 alarm related parameter (cause) 36.
Then, a parameter that can be affected after the alarm related to the A1 alarm data 34 is issued is stored as an A1 alarm related parameter (result) 37. Further, an alarm that may be affected and issued after the alarm related to the A1 alarm data 34 is issued is stored as an A1 alarm related alarm (result) 38.
That is, the alarm (A1 alarm data 34) issued during the operation of the nuclear power plant is centered on, so to speak, the upstream A1 alarm-related parameter (cause) 36 causing the cause, and the downstream A1 alarm related as a result. A hierarchical structure is formed so that a parameter (result) 37 and an A1 alarm-related alarm (result) 38 that may be issued in association with an alarm issued during driving can be associated and withdrawn simultaneously. Is stored.
The hierarchical structure as referred to herein, initially as a central layer alarms are alarm (A1 alarm data 34), to its upper layer A1 alarm related parameters (cause) 36, A1 alarm related parameters (Results) in the lower layer 3 7 and A1 It means a structure in which an alarm-related alarm (result) 38 is arranged.

Therefore, in order to specify the cause by using the alarm (cause alarm) that occurs initially as a starting point, the A1 alarm-related parameter (cause) 36 is expanded and displayed, and a ripple event that may occur thereafter is predicted. Develops and displays the A1 alarm related parameter (result) 37. Further, when predicting an alarm to be issued after that, since the state of the A1 alarm related parameter (result) 37 can be grasped, the A1 alarm related alarm (result) 38 can be expanded and displayed. It is possible to determine the cause of the alarm that is considered upstream from the initial alarm, and at the same time it is possible to determine the possibility of possible future events downstream from the initial alarm.
The A alarm database 30 stores a plurality of A alarm data such as the A2 alarm data 35 in addition to the A1 alarm data 34. With respect to the A2 alarm data 35 as well, the A2 alarm related parameter ( Cause 39, A2 alarm related parameter (result) 40 and A2 alarm related alarm (result) 41 are stored in the alarm/parameter database 6 while forming a hierarchical structure. Therefore, it is possible to display these multiple alarm data and operation-related parameters in a list for each hierarchy, and it is highly visible.When an alarm is issued, the operator is required to investigate the cause on the upstream side. It is possible to easily make a prediction about an event that may exist on the downstream side in a short time.

The screen information database 7 stores a form required for screen display output to the output unit 4, and data related to this form is A alarm screen information data 45, B for each alarm classified into A to D. The alarm screen information data 46, the C alarm screen information data 47, and the D alarm screen information data 48 are present, and are stored in a readable manner.

The P&ID database 8 stores, for each system, a piping and instrumentation diagram (P&ID) for a plurality of systems (systems) constituting the nuclear power plant. Specifically, there are a control rod drive system (CRD system) P&ID 50, a reactor cleaning system (CUW system) P&ID 51, a boric acid injection system (SLC system) P&ID 52, and the like. Of course, these P&IDs are also made to be read out according to the request of the operator in association with related alarms and operating parameters. The same applies to the following manuals and security regulations. However, regarding the safety regulations, it is also desirable that the information is automatically displayed in the event of conflict, regardless of the operator's request. The system of the nuclear power plant is not limited to the above-mentioned example, and there are more systems, which are also stored in the P&ID database 8.

The manual database 9 stores an accident occurrence manual for a plurality of systems (systems) constituting a nuclear power plant for each system. Specifically, there are a CRD system manual 53, a CUW system manual 54, an SLC system manual 55, and the like, but like the P&ID database 8, other systems are also stored.

The safety regulation database 10 stores the safety regulations for a plurality of systems (systems) that constitute a nuclear power plant for each system. Specifically, there are a CRD system security regulation 56, a CUW system security regulation 57, an SLC system security regulation 58, and the like, but the other systems are similarly stored.

Hereinafter, with reference to FIG. 6 to FIG. 32 as well, regarding the processing contents executed by the nuclear power plant alarm monitoring support system 1 according to the present embodiment, the actions and effects of the individual constituent elements included in the calculation unit 3 are included. explain.
FIG. 6 is a flow chart relating to the alarm and related parameter display processing executed by the nuclear power plant alarm monitoring support system according to the embodiment of the present invention. In FIG. 6, signals other than measured values of operating parameters and operating parameters of equipment and facilities installed in a nuclear power plant, such as on/off of equipment, trip events, and signals related to other occurrence events are installed in the central control room. To the plant control panel (central control room) 61 directly and in the vicinity of its installation location from the plant control panel (field panel) 60 through the plant control panel (central control room) 61 installed in the central control room It is input to the operating state monitoring unit 11 of the power plant warning monitoring support system 1. The operating state monitoring unit 11 constantly inputs measured values of operating parameters in order to monitor the operating state of the nuclear power plant. Further, the operating condition monitoring unit 11 stores the measured values of the operating parameters in the operating condition database 5 so as to be readable.
When a transient event, an accident, or the like occurs in a nuclear power plant, a measured value or a signal input to the operating state monitoring unit 11 changes to exceed a set value or a set condition, and a signal regarding the exceeded value. Is transmitted from the operating state monitoring unit 11 to the alarm issuing unit 12, and the alarm issuing unit 12 issues an alarm classified into A to D in advance depending on the conditions and targets that have been exceeded (steps S1-1 and S2). -1, S3-1, S4-1).
At that time, the alarm reporting unit 12 reads out the screen information data 45 to 48 according to the respective alarm classifications from the screen information database 7 according to the respective alarm classifications, and displays the screen display based on the screen information data. Processing is performed (steps S1-2, S2-2, S3-2, S4-2) and output to the output unit 4 (steps S1-3, S2-3, S3-3, S4-3).

Here, a further explanation will be given by taking the A alarm issuance as an example. The A alarm is a parameter type alarm as described above. The parameter type alarm is issued when the numerical value of the operation parameter exceeds the set value during operation, and an example of the screen display when this A alarm is output to the output unit 4 is shown in FIG. .. (A) is a conceptual diagram of a detailed display example of a screen display regarding the A alarm, and (b) is a conceptual diagram of a reduced display example thereof.
7A, among the displays shown in the detailed display example 70 in FIG. 7A, those manually input via the input unit 2 are as shown in FIG. Specifically, a predetermined alarm notification number display 72 that can be specified, a control panel display 73 for symbols attached to the control panel at the site where the operating parameter is the measurement target, an alarm set value display 74, a detector display 75 regarding a detector in which an operating parameter exceeding a set value is detected, an interlock display 76 regarding an interlock related to the operating parameter, a place display 77 regarding a place where the detector is installed, a safety regulation regarding a related safety regulation There are a display 78, an alarm report record display 79 regarding whether or not the alarm report is recorded, a limit value (upper limit) display 80 and a limit value (lower limit) display 81 regarding the target operating parameter. ..
The reduced display example 71 in FIG. 7B can be switched to the detailed display example 70 in FIG. 7A by selecting and clicking the detail display icon 90. This action is also due to the alarm reporting unit 12.

In addition to the above, the detailed display example 70 also displays numerical values processed by the parameter calculation processing unit 13 using the measured values of the operating parameters input from the operating state monitoring unit 11 or the operating state database 5.
Regarding these numerical values, as shown in FIG. 9, specifically, the present value display 82 of the operating parameters, the normal value display 83 obtained by performing the averaging process by extracting the data one day before from the past one month, and the same The maximum value display 84 obtained by extracting the maximum value from the inside, the minimum value display 85 obtained by similarly extracting the minimum value, and the notification obtained by the search processing using the past report history data stored in the operating state database 5 There is a report history display 86.
Further, in the detailed display example 70, as shown in FIG. 10, the parameter calculation processing section 13 compares the upper limit value input from the limit value (upper limit) display 80 or the maximum value display 84 or the upper limit value separately input to the upper limit value. A value is generated, or conversely, the lower limit value (lower limit) display 81, the minimum value display 85, or the lower limit value or 0-value display input via the input unit 2 is compared to generate a lower limit value. It is adopted as the upper limit value and the lower limit value of the bar chart, and the bar chart display 87 is displayed together with the alarm set value and the current value.

In addition, in the detailed display example 70, as shown in FIG. 11, the parameter calculation processing section 13 arbitrarily delays the measured values of the past operating parameters to perform sampling processing, while performing real-time sampling processing on the current values, The deviation is calculated, and based on the deviation, there is a decreasing tendency from the past measured value to the present measured value (-1, -2), a maintaining tendency (0) or an increasing tendency (+1). , +2), and the tendency is displayed 88.
Further, in the detailed display example 70, as shown in FIG. 12, the parameter calculation processing unit 13 reads out the interlock operation set value from the operation state database 5, and compares the current value of the operation parameter by performing real-time sampling processing. However, the estimated time until the interlock operation is calculated and the estimated time until the interlock operation is displayed 89.
It should be noted that these numerical values processed by the parameter calculation processing unit 13 are readably stored in the operating state database 5, and the parameter calculation processing unit 13 reads them from the operating state database 5 and outputs them to the output unit 4. It is displayed.

While checking the detailed display example 70 of the screen display output to the output unit 4, the operator can grasp the information shown therein.
Also, returning to FIG. 6, the description will be continued.
After step S1-3, as shown in step S1-4, when the trend display request is sent to the parameter calculation processing section 13, the parameter calculation processing section 13 processes the operation parameter (step S1-5). ), the trend display showing the measured values of the operation parameters in time series is executed on the output unit 4 (step S1-6).
The trend display request is executed by clicking and selecting the trend display icon 92 shown on the right side in the detailed display example 70 of FIG. As for the trend display, as shown in FIG. 13, another screen opens, data of 1 hour, 1 day, 1 week, 1 month is selected, and the trend is displayed as a graph display of the period.
When the hard copy icon 93 in FIG. 13 is clicked, a command arrives at the output instructing section 14 and the screen of the detailed display example 70 can be printed. In this case, the output unit 4 corresponds to a printer or the like.
Further, when a request for a manual, P&ID or security regulation shown in step S1-7 in FIG. 6 is made to the output instructing section 14, the output instructing section 14 receives the manual database 9, the P&ID database 8 or the security regulation database 10 respectively. The manual, P&ID, and security regulations are read and displayed on the output unit 4 (steps S1-8, 1-9, 1-10).
The request to display these documents is about the alarm (operation manual at the time of alarm), the accident time (operation manual at the time of accident), the system diagram (P&ID) and the safety regulations displayed on the right side of the detailed display example 70 in FIG. When the security regulation display 78 is present, is executed by clicking the icon of that portion to select it. Of course, it is desirable to automatically display the conflicting security regulations even if there is no request from the operator.
The output unit 4 in the present application may be of a touch panel type, and thus may have a function also serving as the input unit 2. Clicking the icon on the output unit 4 may have the same meaning as selection or request from the input unit 2 to the output instruction unit 14, the parameter calculation processing unit 13, or the related parameter/alarm expansion unit 15. Needless to say, a mouse or the like may be used for selection or request such as icon clicking.

Further, in step S1-11, when the request for the related parameter is made to the related parameter/alarm expansion unit 15, the related parameter/alarm expansion unit 15 transmits the parameter related to the alarm issued in step S1-1 or The process of displaying the alarm on the output unit 4 is executed.
This request for the related parameter is executed by clicking and selecting the related parameter expansion icon 91 shown on the right side in the detailed display example 70 of FIG. When the related parameter expansion icon 91 is clicked, related parameters and alarms related to the alarm (CRD pump inlet temperature high) in the detailed display example 70 are displayed in the lower stage. FIG. 14 shows the displayed state.
In the detailed display example 70 shown in FIG. 14, a device on/off type related parameter display 94 and an alarmless type related parameter detailed display 95 are displayed in the lower stage. When displaying the related parameters related to these alarms and the alarms related to the alarms, if the screen display is color-coded, the visibility of the operator is improved, and the judgment in a shorter time can be executed more accurately and easily. can do. Of course, related parameters related to the alarm can be both related parameters (causes) and related parameters (results), so it is desirable to color these as well. Alternatively, with respect to the color of the related parameter (cause) on the upstream side of the original alarm, the related parameter (result) on the downstream side and the related alarm (result) are set to the same color, and the upstream and downstream sides are color-coded across the original alarm. You may.

Here, returning to FIG. 6, the device on/off type related parameters and the alarmless type related parameters will be described.
The parameters related to the alarm issued in step S1-1 and the like include an alarm-related parameter (cause) and an alarm-related parameter (result) as described with reference to FIG. )), the related parameter/alarm expansion unit 15 provides related parameters (including both cause and effect) and related alarms (results) to be expanded, (1) no alarm type related parameters, (2) device on/off type Related parameters are classified as (3) Related alarm type.
In addition, it is considered that the color-coded display for each of these alarm types leads to a further improvement in visibility and contributes to an improvement in the accuracy of the operator's judgment.

Therefore, when the related parameter/alarm expansion unit 15 receives the request for the related parameter in step S1-11, in step S1-12, the related parameter/alarm expansion unit 15 executes a branching process for classifying the related parameter and the related alarm into these three types. After the branching process, for each classification, in step S1-13, the parameter corresponding to (1) the alarmless type related parameter is processed according to the form as shown in FIG. 15 and displayed on the output unit 4 on the screen. (Step S1-16).
In FIG. 15, (a) is the alarm-free type related parameter detailed display 95, and (b) is the alarm-less type related parameter reduced display 96.

Further, in step S1-14, the parameter corresponding to the (2) device on/off type related parameter is processed according to the form as shown in FIG. 16 and displayed on the output unit 4 on the screen (step S1-16).
FIG. 16 shows an equipment on/off type related parameter display 94 regarding a reactor isolation cooling system (RCIC) pump of a nuclear power plant. Although it is difficult to see in FIG. 16, since this pump is normally stopped, a red mark is displayed when the pump is started and a green mark is displayed when the pump is stopped. In this way, by performing color-coded display in the activated and deactivated states of the device, it becomes easier to determine the operating status of the device, and the accuracy of the operator's determination during a transient event or accident can be improved.

Further, in step S1-15, the alarm corresponding to (3) related alarm type is processed according to the form as shown in FIG. 17 and displayed on the output unit 4 on the screen (step S1-16).
In FIG. 17, (a) is a detailed display 100 of the related alarm type, and (b) is a reduced display example 101 of the related alarm type. All of them show warnings about the hydrogen sealing oil device, which is difficult to understand in the detailed display 100, but the left side of the warning display of "low gas pressure in the cabin" is displayed in red, and this warning is issued. It is shown. On the left side of these alarm displays, red, yellow, and green signal colors will be displayed as marks, which will be used when the alarm is issued (red), after the alarm is issued (yellow), after the alarm is released, or when the alarm is released. Classified as unreported (green).
Such color-coded display enhances the visibility of the operator with respect to the screen display shown on the output unit 4, and can prevent misunderstandings and misjudgments. Therefore, it is possible to make a more accurate judgment even in a state where there is no time or mental allowance, such as during a transition or an accident.
When the alarm detail icon 102 of the detailed display 100 shown in FIG. 17 is clicked, detailed information regarding the content of the alarm is displayed on another screen.
Note that the screen display forms shown in FIGS. 15 to 17 are stored in advance in the screen information database 7, and the related parameter/alarm expansion unit 15 first outputs the parameters and alarms related to the initial alarm to the alarm/parameter database. 6, and the form is read from the screen information database 7 and displayed in accordance with the related parameters and the related alarm.
As described above, the alarm/parameter database 6 has a hierarchical structure of alarm data and parameter data. Therefore, the cause parameter, the effect parameter, and the alarm related to the initial alarm are searched and extracted for each layer. This makes it easier to search and extract.

Now, with reference to FIG. 18, a detailed description will be given of the relationship between the alarm and the related parameter on the upstream side of the nuclear power plant and the related parameter on the downstream side and the alarm.
FIG. 18 is a conceptual diagram showing a causal relationship between alarms and related parameters of a control rod drive system (CRD system) of a nuclear power plant. The control rod drive system is a system for driving a control rod for controlling the reaction of nuclear fuel loaded in a nuclear power plant, and the CRD pump is a pump for generating water pressure for driving the control rod. Is.
In FIG. 18, the initial warning (cause warning) is indicated by the symbol a. For example, an alarm "CRD pump inlet pressure low" can be considered. A possible cause of this initial alarm (cause alarm) is the fluctuation in the numerical value relating to the related parameter (cause) indicated by the symbol b. Specifically, "condensate storage tank water level" drop, "condenser spillover flow rate" drop, "CRD pump inlet strainer differential pressure" increase, "condensate pump power status (M/C (metacla) voltage )” or a power outage, a decrease in “condensate pump outlet pressure”, and other related parameter fluctuations.
An interlock caused by the initial alarm a is a CRD pump trip indicated by reference sign c. There are "A-CRD pump start-up ON/OFF" and "B-CRD pump start-up ON/OFF", which are indicated by reference sign d, indicating the operating state of the CRD pump, that is, the on/off state of the device. Since two CRD pumps, A and B, are installed assuming a single failure, it is necessary to grasp the state of start or stop for each.
Furthermore, as indicated by the symbol e, fluctuations in related parameters (results) caused by the occurrence of this CRD pump trip include a decrease in “accumulator water level/pressure” and a change in “reactor heat output”. As related alarms (results), there are “low scram supply water pressure”, “low CRD cooling water differential pressure”, “high CRD mechanism temperature” and the like. Since the CRD pump trip means stopping the CRD pump, as a result, the cooling water flow rate to the CRD (control rod drive mechanism) decreases and the accumulator water level and pressure for scram (emergency reactor shutdown) decrease, In addition, there will be a drop in the supplied water pressure for the scrum.

Thus, the related parameter (cause) on the upstream side of the initial alarm (cause alarm) generated in the control rod drive system (CRD system) of the nuclear power plant, the related parameter (result) on the downstream side, and the related alarm ( The results) have a close relationship with each other. Therefore, by storing the relations in the alarm/parameter database 6 while maintaining these relationships, it is possible to display a list of causes of the alarms on the output unit 4 on the screen starting with the issuance of the initial alarms. Alternatively, it is possible to display on the output unit 4 a list of parameters and alarms related to a ripple event that may occur thereafter.
In addition, as a result, the related alarms are different for each related parameter. Therefore, in addition to displaying the parameter display related to the initial alarm and the alarm list, the related alarms (corresponding to each of the related parameters (results) are related ( By displaying the (result), it is possible to further demonstrate the superiority of the hierarchical structure.
For example, as shown by the symbol e in FIG. 18, when the CRD pump trip interlock is applied, a related alarm (result) that the CRD mechanism temperature is high may occur. Naturally, there are warnings that may be issued due to fluctuations in (results), so it is important to have a hierarchical structure with related warnings (results) on the downstream side of related parameters (results). ..
However, as already described with reference to FIG. 3 and FIGS. 15 to 17, since the alarm (result) in addition to the operating parameter (result) is related to the initial alarm, the related alarm (result) is always present. It is not provided on the downstream side of the related parameter (result), but includes the case where the related alarm (result) is displayed on the downstream side of the initial alarm (cause alarm).
In any case, the alarms and the operating parameters are configured in a hierarchical structure in advance according to their causal relationship, and the initial alarm (cause alarm) is used as a starting point to develop the list on the output unit 4, so that the operator can It is possible to move between layers of alarms and operating parameters in a short time, and it is possible to make accurate judgments during transient events and accidents even when there is no time or mental allowance.

Next, returning to FIG. 6 again, the case where an alarm other than the A alarm is issued from the alarm issuing unit 12 will be described.
In FIG. 6, when the B alarm is issued as step S2-1, the alarm issuing unit 12 determines the B alarm screen according to the B alarm classification from the screen information database 7 according to the B alarm classification, similarly to the A alarm. The information data 46 is read, screen display processing is performed based on the B alarm screen information data 46 (step S2-2), and output to the output unit 4 (step S2-3).
The B alarm is a field control panel type alarm as described above. The on-site control panel type alarm is issued when the value of the measuring instrument of the control panel installed on the site exceeds the set value, and the B alarm itself is indicated by ON/OFF. An example of the screen display when the B alarm is output to the output unit 4 is the same as that in FIG. 17 already described.
At the beginning of issuing the B alarm, the reduced display example 101 shown in FIG. 17B is displayed. However, as shown in FIG. 19, for example, regarding the B1 alarm (site panel), when the alarm details are requested. The detailed display 100 as shown in FIG. 17 is output to the output unit 4.

Next, in FIG. 6, when the C alarm is issued in step S3-1, the alarm issuing unit 12 classifies the C alarm from the screen information database 7 to classify the C alarm in the same manner as the A and B alarms. The C warning screen information data 47 that follows is read out, the screen display processing is performed based on the C warning screen information data 47 (step S3-2), and the result is output to the output unit 4 (step S3-3).
As described above, the C alarm is a trip type alarm for electric devices such as electric valves and electric motors. The trip type alarm is issued not by a change in operating parameters but by a trip of a device installed on the site, and the C alarm itself is also indicated by ON/OFF. FIG. 20 shows an example of a screen display when the C alarm is output to the output unit 4.
FIG. 20 is a display example regarding an alarm when the motor-operated valve of the residual heat removal system, which is a system for removing residual heat generated in the core when the nuclear reactor is stopped, trips due to overload, (a) is a detailed display example, and (b) is a reduced display example.
At the beginning when the C alarm is issued, the reduced display example 104 shown in FIG. 20B is displayed, but as shown in FIG. 21, for example, regarding the alarm regarding the C1 electric motor (control center) failure display, the alarm details will be described. When requested, the detailed display example 103 shown in FIG. 20 is output to the output unit 4.
Further, as shown in FIG. 21, when a request relating to a manual, P&ID or security regulation is made to the output instructing section 14, the output instructing section 14 outputs the manual database 9, the P&ID database 8 or the security regulation database 10 respectively. The data relating to the document is read and displayed on the output unit 4 on the screen.
Further, when a request regarding the related parameter/alarm is executed to the related parameter/alarm expanding unit 15, the related parameter/alarm expanding unit 15 executes the branching process described with reference to FIG. None Type-related parameters, (2) device on/off type-related parameters, or (3) related alarm-type alarms are classified into output units 4 according to the forms shown in FIGS. 15 to 17, respectively. Display on the screen.
Note that these forms may be stored in the screen information database 7, and the related parameter/alarm expansion unit 15 may read them from the screen information database 7 and display them on the output unit 4.

Next, returning to FIG. 6 again, a case where the D alarm is issued as step S4-1 will be described. Similar to the AC alarm, the alarm reporting unit 12 reads the D alarm screen information data 48 according to the D alarm classification from the screen information database 7 according to the D alarm classification, and based on the D alarm screen information data 48. The screen display process is performed (step S4-2), and the result is output to the output unit 4 (step S4-3).
The D alarm is an event type alarm as described above. The event generation type alarm is issued when a transient event or an accident event actually occurs, not a change in operating parameters. The D alarm itself is also expressed by the occurrence or non-occurrence of an event (event). Therefore, it is indicated by ON/OFF. FIG. 22 shows an example of the screen display when the D alarm is output to the output unit 4.
FIG. 22 is a display example 105 regarding an alarm that is issued when the reactor is stopped by the automatic scrum.
At the beginning of issuing the D alarm, a display smaller than the display example 105 is displayed, but as shown in FIG. 23, for example, regarding the alarm regarding the D1 alarm, when the alarm details are requested, the output unit 4 is notified. A detailed display example 105 as shown in FIG. 22 is output. Although not shown in FIG. 23, similarly to FIG. 21, when the output instruction unit 14 is requested to display a manual, a P&ID, or a document related to the safety regulations, the output unit 4 displays the related parameter/alarm. When a request for developing related parameters or related alarms is made to the expanding unit 15, the related parameter/alarm expanding unit 15 performs a branching process and displays the related parameters/alarms classified into each in the output unit 4.

Next, the use of the nuclear power plant alarm monitoring support system 1 when an accident occurs will be described with reference to FIGS. 24 to 26.
FIG. 24 is a conceptual diagram showing a screen display example for selecting an accident event in the nuclear power plant alarm monitoring support system according to the embodiment of the present invention, and FIG. 25 is a screen display example for similarly selecting an accident event type. FIG. 26 is a conceptual diagram showing a screen display example of parameters and alarms related to the selected accident event. FIG. 27 is a flow chart of an alarm-warning warning process of the nuclear power plant warning monitoring support system according to the embodiment of the present invention. 27, the same components as those shown in FIGS. 1 and 6 are designated by the same reference numerals.
In FIG. 24, an operator who uses the nuclear power plant alarm monitoring support system 1 selects the accident event selection icon 110 on the initial display screen displayed on the output unit 4 (step S5-1 in FIG. 27). ), a command is input from the input unit 2 to the accident event selection unit 16 of the calculation unit 3. The accident event selection unit 16 that has received the command causes the output unit 4 to display the display example 111 classified for each accident.
Next, for example, the reactor scrum accident icon 112 is similarly selected to display the display example 113 shown in FIG. 25, and the type of the accident is selected when the main steam isolation valve is open or closed. To do.
After that, as shown in the display example 114 of FIG. 26 and the flow chart of the alarm warning process at the time of FIG. 27, the accident event selection unit 16 causes the main alarm (initially set through the input unit 2) Alarm), related alarms and related parameters and related accident event prediction alarm data 62 are read from the parameter database 6, and the contents thereof are displayed on the output unit 4. As for the display of this alarm, as already described with reference to FIG. 6, depending on the type of alarm, it is output to the output unit 4 in each form as an A alarm, a B alarm, a C alarm, and a D alarm corresponding to the accident event. Alternatively, the alarm may be output according to the accident event without distinction between the A and D alarms.
In the inside of the alarm/parameter database 6 shown in FIG. 3, databases of an A alarm database 30, a B alarm database 31, a C alarm database 32, and a D alarm database 33 are configured for each alarm type, and The A1 alarm data 34, the A2 alarm data 35, etc., which are based on the respective alarm types, are stored in each of the alarm data. However, each of these alarm data has a tag related to an event such as an accident event or a transient event, and step S5 When a request for selecting an accident event is made at -1, the accident event selecting unit 16 may search and collect the accident event predictive warning data 62 related to the selected event.
Further, regarding the alarm displayed as in the display example 114, the subsequent process is performed by the accident event selecting unit 16 in the central control room as shown in the flow chart of the alarm notification alarm process in FIG. 27. The reported alarm and the alarm related to the accident selected by the accident event selection unit 16 are matched and distributed (step S5-2 in FIG. 27). In the case of an alarm predicted in advance, the display is displayed on the display screen 4a serving as an output unit, and if different, the display is displayed on the display screen 4b. The accident event selection unit 16 performs a process of preventing duplicate display in the system for a match or a different alarm in the matching process. The processed result is sorted and displayed by the accident event selection unit 16 on the display screens 4a and 4b (display device such as CRT, liquid crystal, plasma or organic EL) as an output unit.
The alarms issued by the alarm issuing unit 12 are recorded by the alarm issuing unit 12 in chronological order and stored in the accident record alarm database 64 as the alarm notification list data 63 at the time of the accident. At that time, the operator can input a comment via the input unit 2. It is assumed that the accident warning report list data 63 is displayed via the output unit 4 of the nuclear power plant warning monitoring support system 1 or printed by a printer so that the operator can confirm it. Although not shown in FIG. 1, the accident record warning database 64 is readablely connected to the computing unit 3 like other databases.
The flow of the alarm warning process at the time of an accident shown in FIG. 27 is such that, when an unplanned alarm is issued due to a device failure or the like during the progress of an accident sequence assumed by an operator, by sorting the This is a function of the accident event selection unit 16 for facilitating verification of the above. Further, when the alarms are issued in duplicate, the overlapping display blocking process is performed to prevent the display spaces of the display screens 4a and 4b from being filled up and deteriorating the visibility.
By selecting the alarm screen arbitrary selection icon 115 on the screen of the initial display displayed on the output unit 4 (see the upper part of FIG. 24), the input screen from the input unit 2 to the alarm screen selection unit 17 of the calculation unit 3 is changed. It becomes a command input. The alarm screen selection unit 17 has a function of arbitrarily searching the accident event prediction alarm data 62 regardless of the accident event.

Finally, system management of the nuclear power plant alarm monitoring support system 1 will be described with reference to FIGS. 28 to 32. The system management function described below is performed by the system management unit 18 of the nuclear power plant alarm monitoring support system 1.
In FIG. 28, the operator who uses the nuclear power plant alarm monitoring support system 1 selects the system management icon 120 on the initial display screen displayed on the output unit 4, and thereby the system management unit 18 of the calculation unit 3 is selected. Causes the output unit 4 to display a screen such as a display example 121 in which the alarm group setting icon 122, the accident event group setting icon 123, and the alarm addition/deletion icon 124 are displayed.
First, when the alarm group setting icon 122 is selected, a display example 125 as shown in FIG. 29 is displayed on the output unit 4.
In FIG. 29, first, an alarm to be set is selected from alarms assumed in a nuclear power plant, and the alarm is used as an initial alarm, and related alarm-related parameters (causes) on the upstream side (cause side) of this alarm, On the downstream side (result side), select related alarm related parameters (results) and related alarms (results). In FIG. 29, the selection is made by the control panel or system selection, the check box is checked, and the transition button is pressed, but the selection method is not particularly limited.
All of the selected related parameters and related alarms are stored in the alarm/parameter database 6 shown in FIG. 3 in a hierarchical structure based on the causal relationship.

Next, with reference to the display example 126 of FIG. 30 displayed on the output unit 4 when the alarm group setting icon 122 is selected in FIG. 28, the setting of an accident event (event) in which an alarm is generated will be described.
In FIG. 30, first, an accident event to be set is selected from accident events assumed in a nuclear power plant, and an alarm related to the accident event (initial alarm) and further related to the alarm flow side (cause side). The alarm-related parameter (cause), the alarm-related parameter (result) and the related alarm (result) related on the downstream side (result side) are selected. In this FIG. 30 as well, similar to FIG. 29, by checking the check boxes of the selected related parameters and related alarms and pressing the transition button, the setting is completed. These related parameters and related alarms are also stored in the alarm/parameter database 6 shown in FIG. 3 by forming a hierarchical structure based on the causal relationship.

Registration and deletion relating to an alarm will be described with reference to FIGS. 31 and 32.
FIG. 31 is a conceptual diagram showing a screen display example regarding individual alarm addition settings during system management of the nuclear power plant alert monitoring support system 1, and FIG. 32 is a conceptual diagram showing a screen display example regarding deletion settings as well.
When the alarm addition/deletion icon 124 of the display example 121 shown in FIG. 28 is pressed, the display example 127 of FIG. 31 is displayed on the output unit 4. In this display example 127, when adding an individual alarm, the registration button is pressed, the type associated with the alarm, the alarm number, the alarm name, and other related parameters are input, and then the input contents are confirmed. In order to do so, the temporary display button is pressed to display the screen related to the alarm. After checking, click the Save button to save. In that case, it is desirable to set a password to prevent setting by anyone other than the administrator. Data relating to this alarm is stored in the alarm/parameter database 6.
Next, by pressing the delete button of the display example 128 shown in FIG. 32, each alarm stored in the alarm/parameter database 6 can be deleted.
It is deleted by selecting the alarm you want to delete and then pressing the delete execution button. At that time, it is desirable that deletion be executed with the password used at the time of setting.
Although the terms "button", "icon", etc. are used in the present specification, they are means for selection by an operator or a system administrator on the screen, and are not particularly distinguished. .. Further, any means other than the “button” and the “icon” may be used as long as the selection request (request) by the operator or the system administrator is executed.

As described above, the inventions according to claims 1 to 7 of the present invention provide an operator with a mental and time margin when issuing an alarm for a transient event or an accident that occurs in a nuclear power plant. It can be used as a system that can respond in a short time even in a situation where there is no such situation.
In addition to the actual plant, it can also be used as an operation simulator.

1... Nuclear power plant alarm monitoring support system 2... Input unit 3... Computing unit 4... Output unit 4a, 4b... Display screen 5... Operating state database 6... Warning/parameter database 7... Screen information database 8... P&ID database 9... Manual database 10...Safety regulation database 11...Operating state monitoring unit 12...Alarm reporting unit 13...Parameter calculation processing unit 14...Output instruction unit 15...Related parameters/alarm expansion unit 16...Accident event selection unit 17...Alarm screen selection unit 18... System management unit 20... Data 21... Flow rate data 22... Temperature data 23... Pressure data 24... Differential pressure data 25... Liquid level data 26... Radiation data 27... Equipment on/off data 30... A alarm database 31... B alarm Database 32... C alarm database 33... D alarm database 34... A1 alarm data 35... A2 alarm data 36... A1 alarm related parameter (cause) 37... A1 alarm related parameter (result) 38... A1 alarm related alarm (result) 39... A2 alarm related parameter (cause) 40...A2 alarm related parameter (result) 41...A2 alarm related alarm (result) 45...A alarm screen information data 46...B alarm screen information data 47...C alarm screen information data 48...D alarm Screen information data 50... CRD system P&ID 51... CUW system P&ID 52... SLC system P&ID 53... CRD system manual 54... CUW system manual 55... SLC system manual 56... CRD system safety regulation 57... CUW system safety regulation 58... SLC system safety Regulations 60... Plant control panel (field panel) 61... Plant control panel (central control room) 62... Accident event prediction alert data 63... Accident alert report data 64... Accident record alert database 70... Detailed display example 71... Reduction Display example 72...Alarm notification number display 73...Control panel display 74...Alarm setting value display 75...Detector display 76...Interlock display 77...Location display 78...Safety regulation display 79...Alarm report recording display 80...Limit value (Upper limit) display 81...limit value (lower limit) display 82...current value display 83...normal value display 84...maximum value display 85...minimum value display 86...report history display 87...bar chart table Display 88...Trend display 89...Estimated time until interlock operation 90...Detail display icon 91...Related parameter expansion icon 92...Trend display icon 93...Hard copy icon 94...Device on/off type related parameter display 95...No alarm type related Parameter detail display 96... Alarm-less type related parameter reduced display 100... Detail display 101... Reduced display example 102... Alarm detail icon 103... Detail display example 104... Reduced display example 105... Display example 110... Accident event selection icon 111... Display example 112... Reactor scrum accident icon 113... Display example 114... Display example 115... Alarm screen selection icon 120... System management icon 121... Display example 122... Alarm group setting icon 123... Accident event group setting icon 124... Alarm addition/deletion icon 125...Display example 126...Display example 127...Display example 128...Display example

Claims (7)

While monitoring alarms issued during transient events and accidents in nuclear power plants, at the time of alerting, the cause of the transient events or accidents and the consequent consequent consequent consequent event that may occur afterwards are operated at the nuclear power plant operation. A nuclear power plant alarm monitoring support system that assists personnel in making decisions,
An operating state monitoring unit that acquires and monitors data regarding operating states from the equipment installed in the nuclear power plant,
An alarm issuing unit that issues the alarm at the time of a transient event or an accident in which the data regarding the operating condition acquired by the operating condition monitoring unit exceeds a preset setting range,
An output unit for displaying the alarm issued from the alarm issuing unit as screen information,
Operating parameters associated with the cause of the from the alarm (1) the alarm, (2) operational parameters associated as a result of the alarm (hereinafter referred to as a second operating parameter), and (3) related to the alarm as a result of the alarm (hereinafter, the second called alarm) and related parameters and alarm expansion unit to be displayed on the output unit as the screen information,
(1) the operating parameters associated with the cause of the alarm, the associated second operating parameters, and (3) the associated second alarm as a result of the alarm, the alarm as a result of (2) the alarm A nuclear power plant alarm monitoring support system comprising: an alarm/parameter database that is stored in a hierarchical structure in association with a center . Has a parameter calculation processing unit for performing arithmetic processing using the data relating to the operating condition, the parameter calculation processing unit performs a time-series trend calculation of past and future based on performance of the operating parameters of the device,
The nuclear power plant alarm monitoring support system according to claim 1, wherein the screen information includes the time-series trend calculation result. The parameter calculation processing unit, by using the time-series trend calculation result, enables time calculation until activation of an interlock related to the device or issuance of an alarm,
The nuclear power plant alarm monitoring support system according to claim 2, wherein the screen information includes the time calculation result. A database that stores at least one of a piping instrumentation diagram (hereinafter referred to as P&ID), a system operation manual, and a safety regulation regarding the system of the nuclear power plant,
The output instruction unit that reads at least one of the P&ID, the driving manual, and the safety regulation from the database and displays the output on the output unit according to a request from the operator. The nuclear power plant alarm monitoring support system according to any one of 3 above. 5. The screen information is displayed on the output unit in a selectable manner as a reduced display regarding predetermined essential information and a detailed display including other supplementary information. The nuclear power plant alarm monitoring support system according to the item. The screen information relating to the alarm and the second alarm related as a result of the alarm is classified and displayed in different colors when the alarm is issued, after the alarm is issued, when the alarm is released, or when the alarm is not issued. The nuclear power plant alarm monitoring support system according to any one of claims 1 to 5. Said alarm, (1) the operating parameters associated with the cause of the alarm, (2) the second operating parameter associated as a result of said alarm, and (3) the for the associated said second alarm as a result of the alarm The nuclear power plant alarm monitoring support system according to any one of claims 1 to 6, wherein the screen information is displayed in different colors.