JP2014206947A - Severe-accident-time support monitoring device, severe-accident-time support monitoring method, severe-accident-time support monitoring system, and plant monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To monitor occurrence of a severe accident to a plant and to present support information based upon a monitoring result.SOLUTION: A severe-accident-time support monitoring device 1a includes: a signal reception processing part 13 which receives at least some of measurement signals 10; a safe/alternative system signal extraction information DB 14 in which safe/alternative system data including monitoring items of plant facilities are related and stored; a system signal extraction part 15 which extracts safe/alternative system data and adds monitoring contents; a safe/alternative system data storage part 16 which stores the safe/alternative system data; an SA determination processing part 17a which determines a severe accident; a system actuation condition/schedule prediction part 18 which determines system actuation conditions associated with safe systems and alternative systems and whether the conditions are met or predict actuation time of each system; and a system information display part 110 which systematically displays the safe/alternative system data etc.

Description

  Embodiments described herein relate generally to a severe accident support monitoring apparatus, a severe accident support monitoring method, a severe accident support monitoring system, and a plant monitoring system.

  In the case of a situation where a nuclear accident has progressed to a severe accident due to the occurrence of an earthquake, etc., the conventional plant monitoring device is a parameter for normal plant operation and transient events mainly in facilities within the nuclear power plant. The purpose is to monitor.

  It is a system for responding to a scrum accident at a nuclear power plant, and includes measuring means for measuring the state of each part of the reactor after the occurrence of a scrum accident, and individual measurement information obtained by this measuring means. It is known to comprise a calculation means for calculating a risk index indicating the risk level of the reactor state based on specific measurement information, and a display means for displaying the risk index calculated by the calculation means. (For example, see Patent Document 1).

  In the nuclear emergency calculation system, an acquisition unit that acquires a detection value indicating the state of the nuclear power plant, a storage unit that stores a non-detection value calculation model of the nuclear power plant, and a non-detection value calculation using the detection value as an argument An initial setting unit that calculates a non-detected value by passing it to the model, and a program starter that passes the detected value and the non-detected value as a default value to a program that calculates the behavior of the nuclear power plant at the time of the accident Is known (see, for example, Patent Document 2).

JP-A-6-201892 JP 2007-10375 A

  In the technology disclosed in Patent Document 1 mentioned above, information on a plant at the time of a severe accident is taken into the system by multiplex transmission, and the state of the reactor containment vessel is determined by signal information such as control rod, pressure, temperature, hydrogen concentration, and radioactivity concentration. The storage container index is calculated as a risk index indicating the degree of risk of the risk and displayed on the monitoring device. Moreover, in the technique by patent document 2 etc., simulation prediction is performed, tracking a plant state using a predetermined | prescribed calculation model, and an abnormal value is notified to an operator.

  In addition, these technologies do not have a means for judging the occurrence of severe accidents, but perform risk assessment of plant conditions including containment vessels, predictive calculations, but various systems for safety systems and alternative system operations to prevent accident expansion. However, it does not show a device with a support function for the purpose of providing information and converging accidents.

  The problem to be solved by the embodiments of the present invention is to monitor the occurrence of a severe accident in a plant and present support information based on the monitoring result. It is to provide a severe accident support monitoring system and a plant monitoring system.

  In order to solve the above-described problem, a severe accident support monitoring apparatus according to an embodiment inputs measurement signals output from a plurality of measurement devices installed in a plant having plant equipment related to a safety system and an alternative system, and the plant It is a support monitoring device at the time of a severe accident that supports a plant monitoring device for monitoring. The severe accident support monitoring device is included in the measurement signal for each of the signal reception processing unit that receives at least a part of the measurement signal input to the plant monitoring device, and the safety system and the alternative system. Refer to the safety / alternative system signal extraction information database and the safety / alternative system signal extraction information database for storing the safety / alternative system signal and the safety / alternative system data including monitoring items in the plant equipment in association with each other. The safety / alternative system signal is identified from the measurement signal received by the signal reception processing unit, and the safety / alternative system data associated with the identified safety / alternative system signal is extracted and used as the monitoring item. System signal extraction unit for adding corresponding monitoring content, and the safety / alternative system to which the monitoring content is added by the system signal extraction unit A safety / alternative system data storage unit that stores data, and a severe accident that inputs the measurement signal from the signal reception processing unit and determines a severe accident for the plant by a predetermined logic determination process using the input measurement signal Based on the determination processing unit, the result of the logic determination processing determined by the severe accident determination processing unit, and the safety / alternative system data stored in the safety / alternative system data storage unit, the safety system and A system activation condition / schedule prediction unit for determining a system activation condition for the alternative system and whether or not the system activation condition is established, or predicting an activation time at which each of the systems included in the safety system and the alternative system can be activated; The system start condition determined by the system start condition / schedule prediction unit and whether or not the system start condition is satisfied, Said activation time predicted, characterized in that it comprises a system information display unit for displaying said safety / alternate system data.

  Further, in order to solve the above-described problem, the severe accident support monitoring method according to the embodiment inputs measurement signals output from a plurality of measuring devices installed in a plant having plant facilities related to a safety system and an alternative system. The safety / alternative system signal included in the measurement signal and the safety / alternative system data including monitoring items in the plant equipment are stored in association with each other for the safety system and the alternative system, which supports the plant monitoring apparatus that monitors the plant. This is a severe accident support monitoring method used in a severe accident support monitoring apparatus having a safety / alternative system signal extraction information database. The severe accident support monitoring method includes a signal reception processing step in which the severe accident support monitoring device receives at least a part of the measurement signals input to the plant monitoring device, and the severe accident support. A monitoring device identifies the safety / alternative system signal from the measurement signal received in the signal reception processing step based on the safety / alternative system signal extraction information database, and associates the safety / alternative system signal with the identified safety / alternative system signal A system signal extraction step for extracting the safety / alternative system data obtained and adding monitoring content corresponding to the monitoring item; and the severe accident support monitoring apparatus is added with the monitoring content in the system signal extraction step. A safety / alternative system data storage step for storing the safety / alternative system data, and a severe accident support monitoring device. A severe accident determination processing step for determining a severe accident for the plant by a predetermined logic determination process using the measurement signal input in the signal reception processing step, and the severe accident support monitoring device includes the severe accident determination processing step. Based on the result of the logic determination process determined in step 1 and the safety / alternative system data stored in the safety / alternative system data storage step, the system start condition and the system start condition related to the safety system and the alternative system A system activation condition / schedule prediction step for determining whether or not the system is established or predicting a start time at which each of the systems included in the safety system and the alternative system can be activated, and the severe accident support monitoring device includes the system The system occurrence determined in the start condition / schedule prediction step It characterized in that it comprises a condition and the start time of the presence or predicts the system start conditions are satisfied, and a system information display step of displaying said safety / alternate system data.

  In order to solve the above problems, the severe accident support monitoring system according to the embodiment inputs measurement signals output from a plurality of measuring devices installed in a plant having plant facilities related to a safety system and an alternative system. A severe accident support monitoring system comprising: a severe accident support monitoring apparatus that supports a plant monitoring apparatus that monitors the plant; and an ANN panel that is connected to the severe accident support monitoring apparatus and captures and processes alarms related to the plant. It is. The severe accident support monitoring device is included in the measurement signal for each of the signal reception processing unit that receives at least a part of the measurement signal input to the plant monitoring device, and the safety system and the alternative system. Based on the safety / alternative system signal extraction information database, the safety / alternative system signal extraction information database for storing the safety / alternative system signal and the safety / alternative system data including monitoring items in the plant equipment in association with each other, The safety / alternative system signal is identified from the measurement signal received by the signal reception processing unit, and the safety / alternative system data associated with the identified safety / alternative system signal is extracted to correspond to the monitoring item A system signal extraction unit for adding monitoring contents to be performed, and the safety / alternative system to which the monitoring contents are added by the system signal extraction unit A safety / alternative system data storage unit that stores data, and a severe accident that inputs the measurement signal from the signal reception processing unit and determines a severe accident for the plant by a predetermined logic determination process using the input measurement signal Based on the determination processing unit, the result of the logic determination processing determined by the severe accident determination processing unit, and the safety / alternative system data stored in the safety / alternative system data storage unit, the safety system and A system activation condition / schedule prediction unit for determining a system activation condition for the alternative system and whether or not the system activation condition is established, or predicting an activation time at which each of the systems included in the safety system and the alternative system can be activated; The system start condition determined by the system start condition / schedule prediction unit and whether or not the system start condition is satisfied, A system information display unit that displays the predicted start time and the safety / alternative system data, and at least an SA alarm determination value corresponding to the progress stage of the severe accident is stored for each measurement signal used for the logic determination process. An SA alarm determination value storage unit, an SA alarm determination value switching unit that switches the SA alarm determination value for the measurement signal used in the logic determination process, according to the progress stage of the severe accident, and the SA alarm determination An SA alarm determination value setting unit that sets the SA alarm determination value for the measurement signal switched by the value switching unit as a current SA alarm determination value, and the current SA alarm determination set in the SA alarm determination value setting unit Using the value, it is determined whether or not there is an input that deviates from the current SA alarm judgment value for the measurement signal used in the logic judgment process. An alarm determination processing unit for performing an alarm determination to be determined, and an alarm determination value set for an alarm related to the plant, in response to a request to switch the alarm determination value from the ANN board, to the progress stage of the severe accident An alarm determination value switching request processing unit capable of switching between the current SA alarm determination value corresponding to the normal alarm determination value corresponding to the plant before the severe accident, and the current SA alarm determination value Is transmitted to the ANN board. The ANN panel also includes an ANN determination value storage unit that stores an ANN determination value for each alarm, and the normal alarm determination value corresponding to the normal operation of the plant to the SA alarm determination value corresponding to the severe accident. When switching, the alarm determination value switching unit that transmits a determination value switching request signal to the severe accident support monitoring device, and the current SA alarm determination value and alarm determination value switching permission from the SA alarm determination value transmission unit An SA alarm determination value receiving unit that updates or adds a part or all of the ANN determination value stored in the ANN determination value storage unit based on the received transmission data, and the ANN Using the ANN determination value stored in the determination value storage unit, an ANN determination processing unit that performs alarm determination for output to the ANN window; In response to the result of the alarm determination, and a, and ANN notification processing unit that performs a warning output processing to the ANN window. The SA alarm determination value transmission unit transmits the current SA alarm determination value to the ANN board when the alarm determination value switching request processing unit receives a request to switch from the ANN board to the current SA alarm determination value. It is characterized by transmitting.

  In order to solve the above problems, a plant monitoring system according to an embodiment includes a plant monitoring device that monitors a plant having plant facilities related to a safety system and an alternative system, and a severe accident support monitoring device that supports the plant monitoring device. And a ANN panel connected to the severe accident support monitoring device and capturing and processing alarms related to the plant. The plant monitoring device inputs measurement signals output from a plurality of measuring devices installed in the plant and monitors the plant. The severe accident support monitoring device is included in the measurement signal for each of the signal reception processing unit that receives at least a part of the measurement signal input to the plant monitoring device, and the safety system and the alternative system. Based on the safety / alternative system signal extraction information database, the safety / alternative system signal extraction information database for storing the safety / alternative system signal and the safety / alternative system data including monitoring items in the plant equipment in association with each other, The safety / alternative system signal is identified from the measurement signal received by the signal reception processing unit, and the safety / alternative system data associated with the identified safety / alternative system signal is extracted to correspond to the monitoring item A system signal extraction unit for adding monitoring contents to be performed, and the safety / alternative system to which the monitoring contents are added by the system signal extraction unit A safety / alternative system data storage unit that stores data, and a severe accident that inputs the measurement signal from the signal reception processing unit and determines a severe accident for the plant by a predetermined logic determination process using the input measurement signal Based on the determination processing unit, the result of the logic determination processing determined by the severe accident determination processing unit, and the safety / alternative system data stored in the safety / alternative system data storage unit, the safety system and A system activation condition / schedule prediction unit for determining a system activation condition for the alternative system and whether or not the system activation condition is established, or predicting an activation time at which each of the systems included in the safety system and the alternative system can be activated; The system start condition determined by the system start condition / schedule prediction unit and whether or not the system start condition is satisfied, A system information display unit that displays the predicted start time and the safety / alternative system data, and at least an SA alarm determination value corresponding to the progress stage of the severe accident is stored for each measurement signal used for the logic determination process. An SA alarm determination value storage unit, an SA alarm determination value switching unit that switches the SA alarm determination value for the measurement signal used in the logic determination process, according to the progress stage of the severe accident, and the SA alarm determination An SA alarm determination value setting unit that sets the SA alarm determination value for the measurement signal switched by the value switching unit as a current SA alarm determination value, and the current SA alarm determination set in the SA alarm determination value setting unit Using the value, it is determined whether or not there is an input that deviates from the current SA alarm judgment value for the measurement signal used in the logic judgment process. An alarm determination processing unit for performing an alarm determination to be determined, and an alarm determination value set for an alarm related to the plant, in response to a request to switch the alarm determination value from the ANN board, to the progress stage of the severe accident An alarm determination value switching request processing unit capable of switching between the current SA alarm determination value corresponding to the normal alarm determination value corresponding to the plant before the severe accident, and the current SA alarm determination value Is transmitted to the ANN board. The ANN panel also includes an ANN determination value storage unit that stores an ANN determination value for each alarm, and the normal alarm determination value corresponding to the normal operation of the plant to the SA alarm determination value corresponding to the severe accident. When switching, the alarm determination value switching unit that transmits a determination value switching request signal to the severe accident support monitoring device, and the current SA alarm determination value and alarm determination value switching permission from the SA alarm determination value transmission unit An SA alarm determination value receiving unit that updates or adds a part or all of the ANN determination value stored in the ANN determination value storage unit based on the received transmission data, and the ANN Using the ANN determination value stored in the determination value storage unit, an ANN determination processing unit that performs alarm determination for output to the ANN window; In response to the result of the alarm determination, and a, and ANN notification processing unit that performs a warning output processing to the ANN window. The SA alarm determination value transmission unit transmits the current SA alarm determination value to the ANN board when the alarm determination value switching request processing unit receives a request to switch from the ANN board to the current SA alarm determination value. It is characterized by transmitting.

  According to the embodiments of the severe accident support monitoring apparatus, severe accident support monitoring method, severe accident support monitoring system, and plant monitoring system according to the present invention, the occurrence of a severe accident in the plant is monitored, and based on the monitoring result. Support information can be presented.

The block diagram which shows the structure of 1st Embodiment of the severe accident support monitoring apparatus which concerns on this invention. The block diagram which shows an example of a structure of the plant monitoring apparatus of FIG. FIG. 2 is a logic diagram illustrating an example of determination processing of an SA determination processing unit in FIG. 1. The figure which shows the example of a data structure preserve | saved at the system | strain starting condition / schedule data preservation | save part of FIG. FIG. 2 is a flowchart of a severe accident support monitoring process flow used in the severe accident support monitoring apparatus of FIG. 1. The block diagram which shows the structure of 2nd Embodiment of the severe accident support monitoring apparatus which concerns on this invention. The figure which shows the structural example of the monitoring / signal priority database of FIG. The figure which shows the example of a screen display of the recovery guidance of 2nd Embodiment. The block diagram which shows the structure of 3rd Embodiment of the severe accident support monitoring apparatus which concerns on this invention. The block diagram which shows the structure of 4th Embodiment of the severe accident support monitoring apparatus which concerns on this invention. The figure which shows the example of a screen display of recovery log | history data reference of 4th Embodiment. The block diagram which shows the structure of 5th Embodiment of the severe accident support monitoring apparatus which concerns on this invention, and the structure of embodiment of the severe accident support monitoring system and plant monitoring system.

  Hereinafter, a severe accident support monitoring apparatus, a severe accident support monitoring method, a severe accident support monitoring system, and a plant monitoring system according to embodiments of the present invention will be specifically described with reference to the drawings. Here, the same or similar parts are denoted by common reference numerals, and redundant description is omitted. Each of the following embodiments described here will be described by taking an example of a severe accident support monitoring apparatus in a nuclear reactor plant as a plant.

[First Embodiment]
FIG. 1 is a block diagram showing a configuration of a first embodiment of a severe accident support monitoring apparatus according to the present invention. FIG. 2 is a block diagram showing an example of the configuration of the plant monitoring apparatus of FIG. 3 is a logical diagram illustrating an example of the determination process of the SA determination processing unit in FIG. 1, and FIG. 4 is a diagram illustrating a data configuration example stored in the system activation condition / schedule data storage unit in FIG. . FIG. 5 is a flowchart of the severe accident support monitoring process flow used in the severe accident support monitoring apparatus of FIG.

  FIG. 1 shows, for example, a plant monitoring device 100 provided in a power generation unit building of a nuclear reactor plant, and a signal for relaying and transmitting measurement signals 10 from a plurality of measuring devices to the plant monitoring device 100 and distributing the signals. It is a block diagram showing a distribution device 2 and a severe accident support monitoring device 1a provided in, for example, an emergency countermeasure building to which the distributed distribution signal 20a is input.

  First, the function of the plant monitoring apparatus 100 shown in FIG. 2 will be described.

  The signal input processing unit 11 of the signal distribution device 2 inputs the measurement signal 10. The measurement signal 10 is a signal output from a plurality of measurement devices provided in the plant facility. The measurement signal 10 is a signal corresponding to a measurement item to be monitored by the plant monitoring apparatus 100. For example, in the case of a nuclear reactor plant, the reactor pressure, the reactor water level, the reactor temperature, the radiation monitor of the exhaust stack, etc. Signal.

  The signal input processing unit 11 amplifies the input measurement signal 10 for distribution output, for example, for an analog signal, and performs processing such as waveform shaping for a digital signal. Further, the signal input processing unit 11 performs engineering value conversion (or conversion to a range corresponding to a physical value, etc.) of the input measurement signal 10 as necessary, and outputs it to the signal distribution processing unit 12. Note that part or all of the measurement signal 10 may be directly input to the signal distribution processing unit 12 without going through the signal input processing unit 11. In this case, for example, the signal distribution processing unit 12 also has the function of the signal input processing unit 11.

  The signal distribution processing unit 12 distributes the input measurement signal 10 to at least two signal transmission paths. The two signal transmission paths are signal transmission paths that transmit the distribution signal 20a output to the severe accident support monitoring apparatus 1a and the distribution signal 20b output to the plant monitoring apparatus 100.

  For example, when the signal distribution device 2 is not initially provided in the existing power generation unit building, that is, a signal cable or the like is connected so that the measurement signal 10 is directly input only to the plant monitoring device 100. In some cases, the signal distribution device 2 may be installed at a later date. In this case, the signal distribution device 2 can be provided in the existing plant equipment by laying work or the like, and the severe accident support monitoring device 1a can be easily added.

  In the plant monitoring apparatus 100, the distribution signal 20b to which the measurement signal 10 is distributed is input via the signal reception processing unit 1102.

  Since the input distribution signal 20b is the same signal as the measurement signal 10, the signal alarm determination unit 1103 generates an alarm according to the alarm type of each measurement signal 10 in the same manner as the measurement signal 10 before distribution. It is determined whether or not.

  For example, the signal alarm determination unit 1103 determines whether an alarm is generated for the distribution signal 20 b corresponding to each measurement signal 10 based on the signal alarm determination information database (DB) 1104. That is, the signal alarm determination unit 1103 can determine the distribution signal 20b in the same manner as the measurement signal 10 before distribution.

  The alarm information display unit 1105 displays the determination result of the signal alarm determination unit 1103 described above.

  As described above, the plant monitoring apparatus 100 can perform the plant monitoring process without changing the signal distribution apparatus 2 and the severe accident support monitoring apparatus 1a.

  Next, the configuration of the severe accident support monitoring apparatus 1a shown in FIG. 1 will be described below.

  The severe accident support monitoring device 1a is installed separately from the plant monitoring device 100, for example, in a building (for example, an emergency countermeasure building or the like) independent of the power generation unit building. In addition, this apparatus is supplied with power from facilities supplied by a backup power supply (including an alternative power supply) such as an uninterruptible power supply so that it can operate even in the event of an external power loss.

  In FIG. 1, a measurement signal 10 from a measurement device (not shown) installed at a plant site is once input to the signal distribution device 2, and then subjected to engineering value conversion (physical quantity conversion) by a signal input processing unit 11. Input to the distribution processing unit 12.

  The signal distribution processing unit 12 distributes and outputs the input measurement signal 10 to a plurality of devices. For example, the signal distribution processing unit 12 outputs the input measurement signal 10 to the plant monitoring apparatus 100 and also outputs it to the severe accident support monitoring apparatus 1a.

  The measurement signal 10 is not only distributed and transmitted to the plant monitoring device 100 and the severe accident support monitoring device 1a by the signal distribution device 2, but also immediately distributed from the on-site measurement device to the plant monitoring device 100 and the severe accident. It is good also as a structure which transmits to the hour assistance monitoring apparatus 1a.

  Furthermore, for the same measurement object as the plant monitoring apparatus 100, an on-site measurement apparatus that transmits the measurement signal 10 may be provided only in the severe accident support monitoring apparatus 1a.

  As described above, the measurement signal 10 is distributed by the signal distribution device 2 into the distribution signal 20a and the distribution signal 20b. Then, the signal distribution device 2 outputs the distribution signal 20a to the severe accident support monitoring device 1a, and outputs the distribution signal 20b to the plant monitoring device 100.

  As shown in FIG. 1, the severe accident support monitoring device 1a includes a signal reception processing unit 13, a safety / alternative system signal extraction information DB (database) 14, a system signal extraction unit 15, a safety / alternative system data storage unit 16, An SA (severe accident) determination processing unit 17a, a system activation condition / schedule prediction unit 18, a system activation condition / schedule data storage unit 19, and a system information display unit 110 are provided.

  The signal reception processing unit 13 receives at least a part of the measurement signal 10 (distributed signal 20a in FIG. 1) of the measurement signal 10 input to the plant monitoring apparatus 100. The signal reception processing unit 13 performs reception processing such as filter processing and sampling processing on the received input distribution signal 20a.

  The signal reception processing unit 13 is connected to the signal distribution processing unit 12 described above so that signal transmission is possible. The signal reception processing unit 13 receives at least the distribution signal 20a including each measurement value via, for example, a signal cable or a network line. A signal cable or a network line is a signal transmission system that is wired or wireless, or a combination thereof. The signal transmission method may be bidirectional signal transmission as well as one-way.

  The signal reception processing unit 13 outputs the received distribution signal 20a to the system signal extraction unit 15, and outputs it to the SA (severe accident) determination processing unit 17a.

  The safety / alternative system signal extraction information database 14 stores the safety / alternative system signal included in the distribution signal 20a and safety / alternative system data including monitoring items in the plant equipment in association with each other for each safety system and alternative system. .

  The safety / alternative system signal extraction information DB 14 stores in advance information on safety / alternative system signals related to plant equipment (signal inputs related to safety / alternative systems) for each safety / alternative system. The plant equipment includes a safety system for a safe stop of the plant and an alternative system prepared for a situation where the safety system cannot operate. The safety / alternative system signal stores safety / alternative system data including monitoring items in association with each other.

  The information regarding the plant equipment is information including, for example, which safety system, which alternative system such as a power source or a water source, a start condition regarding the alternative system, and the like. The power source alternative system is a power source system having an alternative power source such as a battery or an emergency D / G (diesel generator). Among the safety / alternative system signals, the safety system signal is a signal related to the safety system such as the reactor pressure and the reactor water level, and the alternative system signal is, for example, an emergency power source D / G start signal, high-pressure water injection This is a signal related to an alternative system such as a valve opening / closing signal.

  The system signal extraction unit 15 refers to the safety / alternative system signal extraction information database 14 and identifies the safety / alternative system signal from the signal input received by the signal reception processing unit 13. The system signal extraction unit 15 extracts safety / alternative system data associated with the identified safety / alternative system signal. The system signal extraction unit 15 further includes (adds) the monitoring content (measurement time, measurement data, etc.) to the extracted safety / alternative system data and stores it in the safety / alternative system data storage unit 16.

  The safety / alternative system data storage unit 16 stores the safety / alternative system data to which the monitoring content is added by the system signal extraction unit 15.

  The SA determination processing unit 17a receives a measurement signal from the signal reception processing unit 13, and determines a severe accident for the plant by a predetermined logic determination process using any of the input measurement signals.

  The SA determination processing unit 17a determines the occurrence of a severe accident based on a predetermined determination process for signal input. The SA determination processing unit 17a performs a determination process on the signal input by a combination of an AND process, an OR process, a conditional branch process, and the like, which are logic processes, for example.

  FIG. 3 shows an example of logic processing in the automatic determination processing of the SA determination processing unit 17a.

  For example, the condition AA and the condition BB shown in FIG. 3 are conditions related to radiation detection. In particular, the condition AA determines whether or not the radiation value outside the building in which the plant equipment is stored has become a certain level or more. Indicates conditions. Moreover, condition BB shows the conditions which determine whether the atmosphere monitor value became more than a fixed level about the building in which plant equipment is stored. Furthermore, the condition CC is a condition that leads to the core melting, and shows a condition for determining a measurement signal related to, for example, the reactor water level and the reactor pressure.

  For this purpose, the SA determination processing unit 17 a inputs the corresponding signal input from the plant monitoring apparatus 100 that is the basis of each condition from the signal reception processing unit 13. For example, an input of the condition AA shown in FIG. 3 includes an exhaust pipe monitor A signal value outside the plant building,..., And an exhaust pipe monitor F signal value. The signal reception processing unit 13 sequentially samples these signal inputs and outputs them to the SA determination processing unit 17a.

  As the condition AA, for example, when a sampling value “XA (μSv / h) or more” is input to the exhaust stack monitor A, the logical value of the determination output 170 of the condition AA becomes true (for example, an output of 1). When a sampling value “below XA (μSv / h)” is input, the determination output 170 of the condition AA has a logical value of false (for example, 0 output). In addition, a sampling value such as “XF (μSv / h) or more” is input to the exhaust stack monitor F. ΜSv / h represents a unit of microsievert / hour.

  The same applies to the input of the condition BB and the condition CC shown in FIG.

  The input of each condition as shown in FIG. 3 is subjected to determination processing by the SA determination processing unit 17a. For example, the logic 171 performs an AND process (logical product) between the determination outputs 170 of each condition. Further, the output after AND processing under each condition is ORed (logical sum) by the logic 172. Further, each output after OR processing by the logic 172 is ORed by the logic 173. The output after the OR processing by the logic 173 is set as the SA determination result 174 and output to the system activation condition / schedule prediction unit 18 shown in FIG.

  In the logic determination processing shown in FIG. 3, the determination outputs of the conditions AA, BB and CC are bundled and ORed, and the output after the OR processing is the determination result of the SA determination processing unit 17a (SA determination shown in FIG. 3). The result 174) is output to the system activation condition / schedule prediction unit 18. That is, the SA determination result 174 shown in FIG. 3 is true if at least one of the condition AA, the condition BB, or the condition CC is true.

  The system activation condition / schedule prediction unit 18 is based on the result of the logic determination process determined by the SA determination processing unit 17 a and the safety / alternative system data stored in the safety / alternative system data storage unit 16. Further, a system start condition regarding the alternative system and whether or not the system start condition is satisfied are determined, or a start time at which each system included in the safety system and the alternative system can be started is predicted.

  The system activation condition / schedule prediction unit 18 stores the determination result of the SA determination processing unit 17a (for example, when SA determination result 174 is true as SA generation) in the safety / alternative system data storage unit 16 as a trigger condition. Based on the obtained data, the start condition regarding the safety system and the alternative system is determined, and the prediction calculation is performed. The system activation condition / schedule prediction unit 18 stores the result of determining the activation condition regarding the safety system and the alternative system and the result of the prediction calculation in the system activation condition / schedule data storage unit 19.

  FIG. 4 shows a configuration example of data stored in the system activation condition / schedule data storage unit 19.

  The data stored in the system activation condition / schedule data storage unit 19, that is, the result of determining the activation condition and the result of predictive calculation for each safety system and each alternative system are, for example, the system activation as described below Condition / schedule data 191.

  As shown in FIG. 4, the system start condition / schedule data 191 includes a plant condition, a system condition, and a startable prediction schedule for each system. For example, the safety system HPCS (High Pressure Core Spray) is a system that injects water when the reactor pressure is high, and the safety system LPCS (Low Pressure Core Spray) is a system that injects water when the reactor pressure is low. is there. In addition, safety system RHR (Residual Heat Removal System), safety system RCIC (Reactor Core Isolation Cooling System), safety system SR (Safety Relief) valve, alternative system AFI (Alternate Feedwater Injection System), alternative system remote SR valve and so on.

  The plant conditions include, for example, system start-up plant conditions in the safety / alternative system for causing the plant safety stop to be executed by the plant equipment, and deviation information regarding the safety / alternative system. The system activation plant condition indicates whether each system can be activated. For example, “◯” indicates that the system can be activated, and “X” indicates that the system cannot be activated. The deviation information is information indicating deviation items in each safety system in the plant state. For example, in the safety system LPCS, a deviation item “reactor pressure high” is shown as the deviation information.

  The system conditions include items about alternative systems such as system lineup and deviation information, system power supply, emergency power supply D / G, alternative system air-cooled D / G, normal water source, backup water source, and large-scale alternative water source.

  The system lineup indicates whether a normal system or an alternative system is ready for each system. The deviation information is information indicating deviation items in the normal system and the alternative system. For example, in the alternative system AFI, a deviation item “not connected to the water supply line” is indicated as the deviation information, and therefore “x” (cannot be prepared) is stored as the system lineup. When “◯” is stored as the system lineup, it indicates that the system is ready.

  As described above, the SA determination processing unit 17a determines the occurrence of a severe accident in the plant. When it is determined by this determination that SA has occurred (when the logic of the SA determination result 174 is true), the system activation condition / schedule prediction unit 18 extracts related data from the safety / alternative system data storage unit 16, and Determine the start conditions of the safety system.

  In the system start condition / schedule data 191 shown in FIG. 4, for example, in the case of the safety system HPCS, when the start condition is satisfied by the pressure determination and the determination of other plant conditions, the system start condition / schedule prediction unit 18 performs the system start plant. It is determined that the condition is ○ (established). In addition, the system lineup is determined based on the state of each valve and pump to determine whether the system is capable of water injection. The same applies to an alternative system of a power source such as an emergency power source D / G and an alternative system of a water source such as a backup water source. The system activation condition / schedule prediction unit 18 determines these comprehensively and determines that the activation condition is satisfied for the safety system HPCS.

  On the other hand, in the case of the safety system LPCS, it is determined that the plant condition deviates when the reactor pressure is greater than or equal to a specified value from the plant condition. When the system activation condition / schedule prediction unit 18 determines that the plant condition deviates with respect to the deviation information of the plant condition and the deviation information of the system condition related to the safety system LPCS, for example, the future state transition is predicted and calculated, and the activation possible prediction schedule As a result (8:30), the above-mentioned information is included (information shown in FIG. 4) and stored in the system activation condition / schedule data storage unit 19.

  As described above, in the startable prediction schedule of FIG. 4, for each system, a system in which the start condition is satisfied is set as “start condition satisfied”, and a system in which the start condition is not satisfied is, for example, “8:30”. The estimated time when the activation condition is established is stored.

  The system information display unit 110 systematically displays the system activation condition determined by the system activation condition / schedule prediction unit 18, the presence / absence of establishment of the system activation condition or the predicted activation time, and the safety / alternative system data.

  Based on the data stored in the safety / alternative system data storage unit 16 and the system activation condition / schedule data storage unit 19, the system information display unit 110 displays the safety / alternative system data related to the safety system and the alternative system. Systematically display it so that it can be easily recognized. In addition to safety / alternative system data, system activation conditions / schedule data 191 are also systematically displayed. An operator in the emergency countermeasure building or the like can issue an instruction related to an actual operation such as a plant stop to the operator in the power generation unit based on the safety / alternative system data. Further, the safety / alternative system data may be transmitted and displayed in a central operation room in the power generation unit.

  Thereby, for example, it is possible to provide the driver with support information including the state of establishment of the comprehensive start condition for the safety system and the alternative system, deviation matters and signal changes, the startable prediction schedule based on the prediction, and the like.

  Next, a severe accident support monitoring process flow used in the severe accident support monitoring apparatus 1a will be described with reference to FIG.

  In the severe accident support monitoring process flow, for example, after the power of the severe accident support monitoring apparatus 1a is turned on, the following step S1 is started.

  The signal reception processing unit 13 receives the distribution signal 20a that is a measurement signal of at least a part of the measurement signal input to the plant monitoring apparatus 100 (step S1).

  The system signal extraction unit 15 refers to the safety / alternative system signal extraction information database 14 to identify the safety / alternative system signal from the distribution signal 20a, and safety / alternative system data associated with the identified safety / alternative system signal. Is extracted (step S2).

  Further, the system signal extraction unit 15 adds measurement data corresponding to the monitoring item to the extracted safety / alternative system data. The system signal extraction unit 15 stores the safety / alternative system data to which the measurement data is added in the safety / alternative system data storage unit 16 (step S3).

  The SA determination processing unit 17a determines a severe accident for the plant through a predetermined logic determination process using any of the input measurement signals (step S4).

  Based on the SA determination result 174 determined by the SA determination processing unit 17a and the safety / alternative system data stored in the safety / alternative system data storage unit 16, the system activation condition / schedule prediction unit 18 The system activation condition regarding the alternative system and whether or not the system activation condition is established are determined, or the activation time at which each system included in the safety system and the alternative system can be activated is predicted (step S5). In addition, the system activation condition / schedule prediction unit 18 stores these determination and prediction results in the system activation condition / schedule data storage unit 19.

  The system information display unit 110 systematically displays the system start condition stored in the system start condition / schedule data storage unit 19 and whether or not the system start condition is satisfied or the start time, and the safety / alternative system data (step). S6). After step S6, the process moves to step S1, and the processes after step S1 are similarly repeated.

  As described above, when a measurement signal is input from a signal distribution input route different from that of a normal plant monitoring device, it is determined whether a severe accident affecting the operation of the plant has occurred, and it is determined that a severe accident has occurred In addition, in order to be able to stop the plant safely, the plant conditions, system startup conditions, power supply and water source alternative systems, etc. are determined from a multifaceted and comprehensive basis regarding the necessity of startup for the safety system and the alternative system. Help to be able to.

  At the same time, it predicts signal transitions related to deviations in starting conditions for safety systems and alternative systems, and predicts schedules that can start systems, and provides them to operators, enabling recovery operations in the event of a severe accident. Necessary information can be provided to the operator promptly and systematically, and it can be supported to contribute to the suppression of accident expansion.

  According to the first embodiment, occurrence of a severe accident in the plant can be monitored, and support information can be presented based on the monitoring result.

[Second Embodiment]
FIG. 6 is a block diagram showing a configuration of the second embodiment of the severe accident support monitoring apparatus according to the present invention. FIG. 7 is a diagram showing an example of the configuration of the monitoring / signal priority database of FIG. 6, and FIG. 8 is a diagram showing a recovery guidance screen display example in the recovery guidance display unit of FIG.

  The severe accident support monitoring device 1b shown in FIG. 6 includes a monitoring / signal priority determination recording unit 21, a monitoring / signal priority database 22, a monitoring / signal in addition to the configuration of the severe accident support monitoring device 1a shown in FIG. A priority data storage unit 23 and a recovery guidance display unit 24 are provided.

  The monitoring / signal priority database 22 is classified into monitoring priority levels of plant safety health and system health, and monitoring priority levels to be monitored are stored for each monitoring priority level. In addition, the monitoring / signal priority database 22 stores the signal priority in association with the measurement signal to be monitored for each monitoring priority hierarchy.

  In the monitoring / signal priority database 22, information (summary signal information) regarding the monitoring priority hierarchy is registered in advance. In the monitoring / signal priority database 22, as shown in FIG. 7, the monitoring priority hierarchy is classified into, for example, plant safety health and system health, and the monitoring priority and signal priority for each measurement signal classified therein. Is stipulated.

  The plant safety / sanity classifies items such as shut down, cool down, confinement, etc., and measurement signals related to the so-called three safety principles. Further, for system soundness, for example, measurement signals relating to normal systems and alternative systems such as power supply securing, high-pressure water injection, decompression, and low-pressure water injection are classified.

  In the monitoring priority hierarchy, a monitoring priority that is an order in which monitoring should be prioritized is registered in advance for each plant safety soundness and system soundness. Furthermore, signal priority, which is a priority order of signals related to recording and warning, is registered in advance according to the progress of severe accidents. The progress status (progress stage) is, for example, when the plant is being restored immediately after the occurrence of a severe accident or after the plant is restored.

  FIG. 7 shows an example of the configuration of the monitoring / signal priority database 22.

  In the monitoring priority hierarchy, a monitoring priority (monitoring priority flag shown in FIG. 7) serving as a priority index for monitoring items is stored for each hierarchy. For example, when the monitoring priority flag = 1, the monitoring item has the highest monitoring priority, and when the monitoring priority flag = 2, the monitoring item has the second highest monitoring priority.

  In addition, for each summary signal information, a signal priority (signal priority flag shown in FIG. 7) serving as a priority index for signal input is stored. In accordance with the SA determination result 174 (FIG. 3) of the SA determination processing unit 17b, the priority of data related to signal input to be recorded in the monitoring / signal priority data storage unit 23 is determined based on the signal priority flag.

  As shown in FIG. 7, for example, the monitoring / signal priority database 22 has “plant safety and health” and “system health” as upper layers. In addition, for example, the middle class belonging to “plant safety and health” is divided into three monitoring items related to safety shutdown of nuclear power plants such as “stop”, “cool” and “confine”, and belongs to “system health” The middle level is divided into monitoring items related to those means such as “Securing power”, “High pressure water injection”, “Depressurization” and “Low pressure water injection”.

  A monitoring priority is predetermined and stored for each monitoring item in the middle hierarchy. For example, as shown in FIG. 7, the monitoring priority flag = 1, which has the highest monitoring priority (first order), is stored in the monitoring item “stop” belonging to “plant safety and health”. Similarly, the monitoring priority flag = 1 is stored in the monitoring items “cool” and “confine”.

  In addition, the monitoring priority flag = 2, which has the second highest monitoring priority (second order), is stored in the monitoring item “Securing power” belonging to “system health”, and “high pressure water injection” and The monitoring item of “decompression” stores a monitoring priority flag = 3, which has the third highest priority, and the monitoring item of “low pressure injection” has the fourth highest priority. Priority flag = 4 is stored.

  In each monitoring item in the middle hierarchy, summary signal information is stored for each signal priority flag. For example, as shown in FIG. 7, the monitoring items of the middle hierarchy “stop” belonging to “plant safety and health” include “scrum state” corresponding to signal priority flag = 1 and signal priority flag = 2. Correspondingly, “reactor pressure”,..., Signal priority flag = N (for example, N is an integer of 5 or more), “steam flow rate” and the like are stored. As for other monitoring items in the middle hierarchy, as shown in FIG. 7, summary signal information is stored corresponding to the signal priority flag.

  The monitoring / signal priority determination recording unit 21 stores the monitoring priority stored in the monitoring / signal priority database 22 for the measurement signal used in the logic determination process when the SA determination processing unit 17b determines that the accident is severe. The monitoring contents related to the measurement signal to be monitored are recorded in accordance with the priority order based on the signal priority.

  The monitoring / signal priority data storage unit 23 stores the monitoring content related to the monitoring target measurement signal recorded by the monitoring / signal priority determination recording unit 21.

  The recovery guidance display unit 24 displays a recovery guidance including information for recovering the plant from the severe accident when it is determined as a severe accident.

  The monitoring / signal priority determination recording unit 21 inputs a determination result (for example, the SA determination result 174 shown in FIG. 3 and a state where each condition is satisfied) from the SA determination processing unit 17b. Further, the monitoring / signal priority determination recording unit 21 determines the progress of the current severe accident in the plant based on the determination result.

  For example, when the SA determination result 174 shown in FIG. 3 is true, it is an advanced stage in response to plant restoration. If the conditions AA to CC are all true for the progress stage, the monitoring / signal priority determination recording unit 21 may determine that the progress status of the severe accident is a serious stage. Further, the monitoring / signal priority determination recording unit 21 determines that the condition is a middle progress stage or the like when some of the conditions AA to CC are true. Further, the stage immediately after the SA determination result 174 changes from true to false is determined as the stage immediately after the plant restoration.

  The monitoring / signal priority determination recording unit 21 refers to the monitoring / signal priority database 22 when monitoring is in any progress stage of the severe accident of the plant, and monitoring is given priority to the plant situation of the current severe accident. Refer to the summary signal information for signal input. At this time, the monitoring / signal priority determination recording unit 21 searches the monitoring / signal priority database 22 for summary signal information that is closest to the current severe accident based on the determination result and the signal input information. . Based on the search result, the monitoring / signal priority determination recording unit 21 records data on the summary signal information under conditions closest to the current severe accident in the monitoring / signal priority data storage unit 23 according to the signal priority. To do.

  Specifically, when the SA determination result 174 shown in FIG. 3 is true, the monitoring / signal priority determination recording unit 21 inputs the signal output from the signal reception processing unit 13 via the SA determination processing unit 17b. With respect to, data is recorded from the signal with the highest priority. That is, the monitoring / signal priority determination recording unit 21 records the signal input information in the monitoring / signal priority data storage unit 23 with the SA determination result 174 being true as a trigger condition. On the other hand, when the SA determination result 174 is false, the monitoring / signal priority determination recording unit 21 does not record the signal input information in the monitoring / signal priority data storage unit 23.

  Note that even if data is recorded in the monitoring / signal priority data storage unit 23 using a trigger condition (a progress stage immediately before a severe accident) that a part of the determination combination in the SA determination logic is true. Good. In this case, for example, the data recorded in the monitoring / signal priority data storage unit 23 records data on the progress situation of the severe accident related to the current plant condition from the plant situation immediately before the severe accident. can do. Thereby, the change of the monitoring content can be easily grasped about the monitoring item before and after the occurrence of the severe accident.

  FIG. 8 shows an example of the recovery guidance screen.

  Based on the data recorded in the monitoring / signal priority data storage unit 23, the recovery guidance display unit 24 displays a screen (recovery guidance screen 240) according to the priority for the operator. Specifically, for example, as shown in FIG. 8, the recovery guidance display unit 24 provides recovery guidance for recovery from accidents such as guidance data 241 to 2412, 2421, and 2422 in terms of accident recovery. Necessary support information is organized and displayed on the recovery guidance screen 240 for provision.

  On the recovery guidance screen 240 in FIG. 8, “monitoring priority 1” (corresponding to the monitoring priority flag = 1 in FIG. 7) and “plant safety soundness confirmation” are displayed as the guidance data 2421. Further, “signal priority N”, “cool”, and “condensate storage tank water level low” are displayed as guidance data 2422 surrounded by a square frame. That is, regarding the monitoring item “cooling” of the plant safety and health, the “condensate storage tank water level” (corresponding to the signal priority flag = N in FIG. 7) which is the target of the summary signal information in FIG. As the recovery guidance is the guidance data 241 to 2412, the monitoring items and the monitoring contents are displayed systematically.

  For example, in the guidance data 241, the monitoring including the current measurement data of the condensate storage tank water level that is a monitoring item for the plant safety and health that is the monitoring target, such as “confirmation of current state ... XX.Xm”. The contents are displayed. For example, guidance data 242 is displayed along the arrow shown in FIG. 8, and the current state of the motor valve of the condensate storage tank is shown as “Confirmation of motor valve state ... open”. Thereafter, similarly to the guidance data 243 to 2412, the plant state related to the condensate storage tank water level is systematically displayed along the arrows and the like so that the operator can easily determine.

  In addition, in order to clearly indicate the monitoring state of the current severe accident progress, for example, the flow of the guidance data 241 to 2412 is displayed in different colors, and the current state is indicated in which state of the flow. It may be displayed so that it can be easily recognized. Note that “(1/5)”, “(2/5)”, and the like shown in FIG. 8 indicate the total number of the current screen or (next transition destination screen page / target screen).

  In the event of a severe plant accident, there are abnormal signs that cannot occur during normal plant operation. The severe accident support monitoring device 1b shown in FIG. 6 organizes monitoring items and monitoring contents that are prioritized for monitoring according to the current severe accident progress from the signal input inputted to the plant monitoring device 100. Can be provided. At the same time, after the occurrence of a severe accident, it is possible to provide support information related to recovery measures for deviations.

  According to the second embodiment, the monitoring / signal priority database regarding the monitoring items of the plant state is provided, for example, the monitoring items related to the three safety principles (stop, cool down, confine) of the nuclear reactor plant are high priority. On the basis of the monitoring / signal priority database set to, the priority is determined according to the progress of the severe accident. Furthermore, the information regarding those monitoring items can be recorded according to the priority. Further, based on the record, it is possible to quickly provide information necessary for accident recovery together with support information for recovery guidance from the viewpoint of accident recovery for deviations.

  As a result, even in the case of confusion at the time of a severe accident, the operator can quickly and effectively grasp the situation and recover from the necessary support information selected according to the signal priority. .

[Third Embodiment]
FIG. 9 is a block diagram showing the configuration of the third embodiment of the severe accident support monitoring apparatus according to the present invention.

  The severe accident support monitoring apparatus 1c shown in FIG. 9 includes, in addition to the configuration of the severe accident support monitoring apparatus 1a shown in FIG. 1, an SA alarm determination value storage unit 31a, an SA alarm determination value setting unit 31b, and an elapsed time data recording unit. 32, an SA alarm determination value switching unit 33, an alarm determination processing unit 34c, and an alarm state display unit 35 are provided.

  Hereinafter, the configuration of the severe accident support monitoring apparatus 1c shown in FIG. 9 will be described mainly with respect to the differences from the severe accident support monitoring apparatus 1a shown in FIG.

  The SA determination processing unit 17c illustrated in FIG. 9 determines the progress of a severe accident in addition to the processing function of the SA determination processing unit 17a illustrated in FIG. Further, the SA determination processing unit 17c has a processing function of recording the progress stage and its elapsed time in the elapsed time data recording unit 32 using, for example, SA generation (for example, the SA determination result 174 in FIG. 3 is true) as a trigger condition.

  For example, the SA determination processing unit 17c records the elapsed time (or time) in the elapsed time data recording unit 32 with the time at the time of SA occurrence as a reference time. Thereby, the progress stage and the elapsed time of the severe accident are sequentially recorded in the elapsed time data recording unit 32.

  The SA alarm determination value storage unit 31a stores at least an SA alarm determination value corresponding to a severe accident progress stage for each measurement signal used in the logic determination process.

  The SA alarm determination value storage unit 31a stores a plurality of SA alarm determination values corresponding to the progress stage of the severe accident for each signal input (monitoring item) to be monitored. The SA alarm determination value storage unit 31a stores SA alarm determination values for the monitoring items corresponding to the respective signal inputs in advance.

  The SA alarm determination value switching unit 33 switches the SA alarm determination value for the measurement signal used for the logic determination process according to the severe accident progress stage.

  For this purpose, the SA alarm determination value switching unit 33 inputs a determination result from the SA determination processing unit 17c. Further, the SA alarm determination value switching unit 33 determines the SA alarm stored in the SA alarm determination value storage unit 31a according to the determination result, the progress stage recorded in the elapsed time data recording unit 32, and the elapsed time. The SA alarm determination value to be set for the current severe accident progress stage is determined from the determination values.

  The SA alarm determination value switching unit 33 stores the determined SA alarm determination value in the SA alarm determination value setting unit 31b. Thereby, the SA alarm determination value switching unit 33 can switch to the alarm determination value according to the current severe accident progress stage.

  The SA alarm determination value setting unit 31b sets the SA alarm determination value for the measurement signal switched by the SA alarm determination value switching unit 33 as the current SA alarm determination value.

  The alarm determination processing unit 34c uses the current SA alarm determination value set in the SA alarm determination value setting unit 31b to determine whether or not there is an input deviating from the current SA alarm determination value for the measurement signal used for the logic determination process. An alarm judgment is made.

  The alarm determination processing unit 34c compares the signal input input from the signal reception processing unit 13 with the SA alarm determination value (referred to as the current SA alarm determination value) stored in the SA alarm determination value setting unit 31b. Monitor status. The alarm determination processing unit 34c notifies the alarm state display unit 35 of the result of alarm determination (SA alarm) when there is an input that deviates from the current SA alarm determination value for each signal input to be monitored. On the other hand, if there is no input deviating from the current SA alarm determination value, the alarm determination result is notified as normal. Thereby, the warning determination processing unit 34c can notify the SA warning corresponding to the progress of the severe accident.

  The input deviating from the current SA alarm determination value is based on the current SA alarm determination value, for example, when the upper limit value is determined for the reactor pressure as the summary signal information in FIG. When it exceeds, it is determined that the current SA alarm determination value is deviated. Further, when the lower limit value is set for the alternative water source water level as summary signal information with the current SA alarm determination value as a reference, it is determined that the current SA alarm determination value deviates when the water level falls below the lower limit value. It is.

  The alarm state display unit 35 displays the result of the alarm determination by the alarm determination processing unit 34c for each measurement signal used for the logic determination process. The result of the alarm determination is an SA alarm when there is a signal input that deviates from the current SA alarm determination value, and is normal when there is no signal input that deviates from the current SA alarm determination value.

  The alarm state display unit 35 notifies information regarding the signal input of the alarm state that deviates from the current SA alarm determination value using an output device such as a display device so that the operator can recognize that it is an SA alarm. Thereby, the operator can recognize the SA alarm corresponding to the progress of the severe accident.

  As described above, according to the third embodiment, a large amount of alarms can be suppressed by switching alarm determination values according to the progress of severe accidents. In other words, the alarm is narrowed down by the SA alarm determination value corresponding to the progress situation and the elapsed time of the severe accident, and it is possible to provide support information related to the deviation matter according to the progress situation and the warning giving priority to the response. As a result, the operator can quickly cope with a recovery operation or a recovery procedure for an important deviation.

  It is also possible to check whether the countermeasure / measure is functioning effectively at the time of recovery immediately after the occurrence of a severe accident or from the viewpoint of recovery by monitoring the safe stop state of the plant after recovery. Thereby, the operator can determine the effect of the recovery measure. For example, when the effect of the recovery measure is small, the operator can quickly determine the next recovery measure means, and can plan and execute it.

[Fourth Embodiment]
FIG. 10 is a block diagram showing a configuration of the fourth embodiment of the severe accident support monitoring apparatus according to the present invention. FIG. 11 is a diagram illustrating a screen display example of referring to recovery history data according to the fourth embodiment.

  As shown in FIG. 10, the severe accident support monitoring device 1 d has a signal input history storage unit 41, a safety / alternative system state, in addition to the configuration of the severe accident support monitoring device 1 c shown in FIG. A history storage unit 42, an alarm recovery state learning unit 43, an alarm recovery safety / alternative system state storage unit 44, and a recovery information display unit 45 are provided. In the following, the configuration of the severe accident support monitoring apparatus 1d shown in FIG. 10 will be described mainly with respect to functions different from those of the severe accident support monitoring apparatus 1c shown in FIG. The SA determination processing unit 17d has the same function as the SA determination processing unit 17c shown in FIG.

  The alarm determination processing unit 34d determines an SA alarm for each signal input, and detects a return from the SA alarm state to the normal state.

  The alarm determination processing unit 34 d stores a history related to signal input input from the signal reception processing unit 13 in the signal input history storage unit 41.

  The signal input history storage unit 41 stores a signal history in a period from the SA alarm state to the normal state for each measurement signal.

  The alarm determination processing unit 34d refers to the safety / alternative system data stored in the safety / alternative system data storage unit 16 and takes a history of the operating state of the safety / alternative system. The alarm determination processing unit 34d stores this history in the safety / alternative system state history storage unit 42.

  The safety / alternative system state history storage unit 42 stores safety / alternative system data in a period from when it is determined that the plant is a severe accident until it is determined that the plant is recovered from the severe accident.

  The history regarding the signal input and the operating state of the safety / alternative system is stored as information that can specify the measurement date and time of the signal, the time including the change of the operating state, and the state change, for example.

  The alarm determination processing unit 34d sequentially compares the signal input with the current SA alarm determination value set in the SA alarm determination value setting unit 31b. Alarm determination processing when the monitored signal input deviates from the current SA alarm determination value (SA alarm state) and when the signal input returns from the SA alarm state to the normal state (SA alarm is released) The unit 34d notifies the alarm return state learning unit 43 to that effect.

  The alarm recovery state learning unit 43 extracts the safety / alternative system data in the recovery period until it is determined that the recovery from the past severe accident from the safety / alternative system state storage unit 44 at the time of alarm recovery when the SA alarm occurs. To do.

  In addition, the alarm return state learning unit 43 determines safety / alternative system data during the recovery period from the time when the plant is determined to be recovered from the current severe accident to the time when the plant is determined to be recovered from the severe accident. Is stored in the safety / alternative system state storage unit 44 at the time of alarm recovery.

  Specifically, when the alarm return state learning unit 43 receives a notification regarding the signal input changed to the SA alarm state from the alarm determination processing unit 34d, the safety / alternative when the SA alarm of the corresponding signal input is canceled. The system operating state and the history of signal change target points are searched from the signal input history storage unit 41 and the safety / alternative system state history storage unit 42.

  After the search is completed, the alarm return state learning unit 43 sets the operation status of the safety / alternative system and the signal change target point when the SA alarm of the corresponding signal input is canceled for the monitoring item in the alarm state such as the SA alarm. The history is acquired from the safety / alternative system state history storage unit 42. The alarm return state learning unit 43 stores the acquired information in the alarm return safety / alternative system state storage unit 44. At the same time, the alarm return state learning unit 43 outputs the acquired information to the recovery information display unit 45.

  Further, the alarm return state learning unit 43 receives a notification of return from the SA alarm state to the state where the SA alarm is released with respect to signal input from the alarm determination processing unit 34d. When the SA alarm of the signal input is canceled, the alarm return state learning unit 43 uses the information regarding the signal input and the operating state of the safety / alternative system as a history of the period until the normal state is recovered. The data is stored in the alternative system state storage unit 44. At the same time, the alarm return state learning unit 43 outputs these pieces of information to the recovery information display unit 45.

  The alarm / safety / alternative system state storage unit 44 stores the safety / alternative system data in the recovery period from the past severe accident until the recovery is determined.

  The recovery information display unit 45 displays the safety / alternative system data extracted by the alarm return state learning unit 43.

  The recovery information display unit 45 can notify the operator of the SA alarm regarding the signal input deviating from the current SA alarm determination value and the history regarding the operating state of the safety / alternative system at the time of the past plant recovery. As a result, in order to support recovery of a plant in the SA alarm state from a severe accident, if any signal input is in a state released from the SA alarm, it is determined whether the operating state of the safety / alternative system reaches the time of plant recovery. Can help.

  FIG. 11 shows an example of a recovery history data reference screen.

  The recovery information display unit 45, together with information related to the signal input in the SA alarm state notified from the alarm recovery state learning unit 43, is a safety when the corresponding signal input at the time of past recovery is returned to the state released from the SA alarm. / Displays information about the operating status of the alternative system.

  As shown in FIG. 11, the recovery information display unit 45 systematically displays information related to signal input on the recovery history data display screen 450 according to the monitoring priority and the signal priority.

  For example, “plant safety and health” in which the monitoring priority flag = 1 in the monitoring / signal priority database 22 shown in FIG. 7 is shown in the guidance data 4521 of the recovery history data display screen 450 in FIG. . Further, “condensate storage tank water level” in which the signal priority flag = N among the “cool” monitoring items in the monitoring / signal priority database 22 is shown in the guidance data 4522 of the recovery history data display screen 450 in FIG. Has been.

  In addition to this, the recovery history data display screen 450 indicates whether or not the plant has recovered from a severe accident when, for example, the input signal is canceled from some or all of the alarm states, some or all of them. Alternatively, a screen display for assisting determination of a recovery procedure (including operation) for recovering the plant from a severe accident is displayed.

  For example, the recovery history data display screen 450 in FIG. 11 includes confirmation of the current state (guidance data 451), confirmation of the motorized valve state (guidance data 452), and confirmation of the manual valve state (guidance data) for the condensate storage tank water level. 453), signal input status such as confirmation of system activation status (guidance data 454 to 4512) is displayed. Moreover, it is systematically displayed so that it can be easily confirmed from these signal input states that the condensate storage tank water level is low.

  Furthermore, when the recovery history data reference button 4501 provided at the upper part of the recovery history data display screen 450 is pressed, the recovery information display unit 45 returns to the state in which the past corresponding signal input is canceled from the SA alarm. The operating status of the safety / alternative system at the time of failure is displayed on the screen. As a result, the operator can easily refer to the recovery history data.

  According to the fourth embodiment, in order to monitor the plant safety stop state after the occurrence of a severe accident and continuously execute the plant safety stop by the facility of the safety / alternative system, the monitored signal input is the SA alarm determination value. When the alarm state deviates from the above, it is possible to provide the operator with support information relating to the past operating state of the safety / alternative system when the signal input is restored to the state released from the SA alarm.

  As a result, it is possible to compare the history of the plant state at the time of recovery in the past and the current plant state, so the operating state of the safety / alternative system at the time of SA alarm occurrence and the safety / alternative system at the time of recovery in the past By comparing with the operating state, it is possible to quickly and efficiently support the operator's judgment on the recovery procedure.

[Fifth Embodiment]
FIG. 12 is a block diagram showing the configuration of the fifth embodiment of the severe accident support monitoring apparatus and the configuration of the severe accident support monitoring system and plant monitoring system according to the present invention.

  As shown in FIG. 12, the plant monitoring system 8e includes the plant monitoring device 100 and the signal distribution device 2 as described above, and a severe accident support monitoring system 7e. The severe accident support monitoring system 7e includes a severe accident support monitoring device 1e, a screen switching device 3, an intermediate operation display screen 4, and an ANN (annunciator) board 5. The severe accident support monitoring system 7e is connected to the external system 6 so as to be able to transmit signals.

  The functions of the plant monitoring device 100 and the signal distribution device 2 in the plant monitoring system 8e are as described above. Here, the configuration and functions of the severe accident support monitoring system 7e will be mainly described.

  As shown in FIG. 12, the severe accident support monitoring device 1e is replaced with a part of the configuration of the severe accident support monitoring device 1c shown in FIG. 9, and a part thereof is changed to an SA determination processing unit 17e, an SA alarm determination value setting unit. 31e, an alarm determination value switching request processing unit 56, an SA alarm determination value transmitting unit 57, and an SA dedicated ANN information processing unit 58. In the following, the configuration of the severe accident support monitoring device 1e shown in FIG. 12 will be described mainly with respect to the differences from the severe accident support monitoring device 1c shown in FIG.

  The other processing unit 59 shown in FIG. 12 includes, for example, the signal reception processing unit 13, the safety / alternative system signal extraction information DB 14, the system signal extraction unit 15, and the safety of the configuration of the severe accident support monitoring device 1 c shown in FIG. / Alternative system data storage unit 16, system activation condition / schedule prediction unit 18, system activation condition / schedule data storage unit 19, system information display unit 110, SA alarm determination value storage unit 31a, elapsed time data recording unit 32, SA An alarm determination value switching unit 33, an alarm determination processing unit 34c, and an alarm state display unit 35 are included. In the other processing unit 59 shown in FIG. 12, these configurations are not shown. Further, the processing between the other processing unit 59 and the SA determination processing unit 17e is the same as that of the severe accident support monitoring device 1c shown in FIG. 9 described above, and therefore detailed description thereof will be omitted.

  The severe accident support monitoring device 1e shown in FIG. 12 has the following functions that can be linked with other connection devices (for example, the intermediate operation display screen 4, the ANN panel 5, and the external system 6).

  First, the configuration of the ANN board 5 will be described as another connection device.

  The ANN panel 5 is an alarm panel that takes in and processes a plurality of alarms output from a plant monitoring device that monitors the plant, other alarm devices, or the like. The alarm is displayed, for example, on an ANN (annunciator) window provided on the ANN board 5 so that the operator can grasp the alarm state and the response to the alarm.

  The ANN board 5 generates an alarm based on an alarm determination value corresponding to switching from a normal alarm determination value based on normal operation of the plant to an SA alarm determination value dedicated to a severe accident or vice versa. Or, it has a function of canceling.

  For this purpose, as shown in FIG. 12, the ANN board 5 includes an alarm determination value switching unit 51, an SA alarm determination value receiving unit 52, an ANN determination value storage unit 53, an ANN determination processing unit 54, and an ANN notification processing unit 55. It has.

  The alarm judgment value switching unit 51 sets the alarm judgment value to be set for the plant-related alarm in response to a request for switching the alarm judgment value from the ANN panel 5 (alarm judgment value switching request signal). It is possible to switch between the corresponding current SA alarm determination value and the normal alarm determination value according to the normal plant before the severe accident.

  The alarm determination value switching unit 51 transmits a determination value switching request signal to the severe accident support monitoring device 1e in order to switch from the alarm determination value based on the normal operation of the plant to the SA alarm determination value dedicated to the severe accident. To do. The alarm determination value switching request signal transmitted from the alarm determination value switching unit 51 is input and processed by the alarm determination value switching request processing unit 56 of the severe accident support monitoring device 1e.

  For example, when a large number of alarms related to a predetermined alarm in the ANN panel 5 are generated, the alarm determination value switching unit 51 determines to switch to the SA alarm determination value dedicated to a severe accident or is manually operated by an operator. Is received and an alarm judgment value switching request signal is generated.

  The alarm determination value switching request processing unit 56 responds to a request to switch the alarm determination value from the ANN panel 5 with the alarm determination value set for the plant-related alarm, and the SA alarm determination value switching unit 33 (for example, FIG. 9). ) Is given permission to switch the SA alarm judgment value.

  When the alarm determination value switching request processing unit 56 receives the SA alarm determination value switching permission, the SA alarm determination value switching unit 33 switches the SA alarm determination value, and the SA alarm determination value transmission unit 57 performs the current SA alarm determination value. Is transmitted to the ANN board 5.

  The alarm determination value switching request signal input by the alarm determination value switching request processing unit 56 is input to the SA determination processing unit 17e.

  The SA determination processing unit 17e outputs (determines) the SA determination result 174 (for example, FIG. 3) by logic processing (combination processing such as AND processing, OR processing, conditional branch processing, etc.) for each SA alarm determination.

  Furthermore, the SA determination processing unit 17e generates an alarm determination value switching permission signal based on the SA determination result 174 and the alarm determination value switching request signal that have been determined. Specifically, the SA determination processing unit 17e is, for example, an alarm determination that permits switching to the SA alarm determination value when the SA determination result 174 is true (SA generation) and there is an alarm determination value switching request. A value switching permission signal is generated. The SA determination processing unit 17e outputs the generated alarm determination value switching permission signal to the SA alarm determination value transmission unit 57.

  The SA alarm determination value transmission unit 57 reads the current SA alarm determination value from the SA alarm determination value setting unit 31e, and transmits transmission data (ANN board transmission shown in FIG. 12) including the read current SA alarm determination value and alarm determination value switching permission. ) Is transmitted to the ANN board 5.

  In the ANN board 5, the SA alarm determination value receiving unit 52 receives transmission data including the current SA alarm determination value and the alarm determination value switching permission. The SA alarm determination value receiving unit 52 updates or adds a part or all of the ANN determination value stored in the ANN determination value storage unit 53 based on the received transmission data. That is, when the alarm determination value switching permission is sent, a part or all of the ANN determination value stored in the ANN determination value storage unit 53 is switched to the current SA alarm determination value.

  The ANN determination processing unit 54 uses the ANN determination value stored in the ANN determination value storage unit 53 to perform alarm determination for output to the ANN window. The ANN determination processing unit 54 transmits the result of the alarm determination to the ANN notification processing unit 55.

  The ANN notification processing unit 55 receives an alarm determination result from the ANN determination processing unit 54 and performs an alarm output process on the ANN window of the ANN board 5. Note that, for example, when it is determined that an alarm has occurred due to the alarm determination, the ANN notification processing unit 55 reports an alarm (such as ANN window display ON, sound output output ON). Further, when it is determined that the alarm is canceled by the alarm determination, the ANN notification processing unit 55 stops the alarm (such as turning off the ANN window display and turning off the output of sound, etc.).

  As described above, in the ANN board 5, the ANN determination value can be switched between an alarm in a normal operation plant and an alarm in a plant in which a severe accident has occurred.

  The severe accident support monitoring device 1e is further connected to the external system 6 so as to be communicable. As a result, in the severe accident support monitoring system 7e, the severe accident support monitoring device 1e transmits the current SA alarm judgment value to the ANN panel 5, and for example, a process computer in the plant side building, an emergency countermeasure building, an offsite, etc. By transmitting transmission data (external transmission shown in FIG. 12) including the plant alarm and the corresponding current SA alarm determination value to the external system 6, these external systems 6 use the current SA alarm determination value. It becomes possible to cooperate.

  The SA dedicated ANN information processing unit 58 receives the current SA alarm determination value from the SA alarm determination value transmission unit 57 when the SA alarm determination value transmission unit 57 transmits the current SA alarm determination value as the alarm determination value of the ANN board 5. Receive. Further, the SA dedicated ANN information processing unit 58 receives a notification from the SA alarm determination value transmission unit 57 as to whether or not an SA alarm has occurred.

  The SA dedicated ANN information processing unit 58, based on the information received from the SA alarm determination value transmitting unit 57, displays SA dedicated ANN display data (transmitted by an SA dedicated image signal) indicating whether or not an SA alarm has occurred in the ANN. Generate. The SA dedicated ANN information processing unit 58 transmits an image switching request signal for requesting switching of the image together with the SA dedicated ANN display data to the screen switching device 3 in the central operation room.

  Upon receiving this image switching request signal, the screen switching device 3 switches the image signal output to the middle control display screen 4 from the normal image signal to the SA dedicated image signal. When receiving the SA-dedicated image signal, the intermediate operation display screen 4 can switch to and display the SA-dedicated ANN screen 410 corresponding to the SA-dedicated ANN window. Note that when the image switching request signal is canceled, the screen switching device 3 switches to a predetermined normal image based on the normal image signal. Thereby, the middle operation display screen 4 displays a normal ANN screen which is a predetermined normal image.

  As described above, the severe accident support monitoring device 1e is operated in conjunction with, for example, the ANN panel 5 and the central operation display screen 4 installed in the central control room, and the severe accident is determined based on the alarm judgment during the normal operation of the plant. It is possible to switch to SA alarm determination corresponding to. Moreover, the reverse switching can also be performed (returning to normal alarm determination).

  As a result, the severe accident support monitoring device 1e suppresses the occurrence of a large amount of alarms on the ANN panel 5 when a severe accident occurs, and selects only the SA alarms that lead to the expansion and recovery of the severe accident. 5 can be output. Thereby, it is possible to avoid confusion in the judgment of the operator due to the generation of a large amount of warnings, and it is possible to support the judgment for quick recovery operation.

  In addition, there is an external system 6 such as an off-site as another connection device. The external system 6 and the severe accident support monitoring device 1e are connected by a signal transmission line such as a network. Thereby, the SA alarm determination value transmission unit 57 can transmit the SA alarm determination value to the external system 6. The external system 6 uses the transmitted SA alarm determination value to monitor an alarm state specified (selected) by, for example, an SA alarm.

  According to the fifth embodiment, when a severe accident occurs, the SA alarm determination value can be transmitted to the ANN board, and the alarm determination value of the ANN board can be switched. As a result, it is possible to select an important SA alarm as a monitoring item that leads to a safe stop of the plant and recovery from the accident, and to output it to the ANN window for the operator, thereby supporting a quicker recovery operation.

  Further, by displaying the SA alarm on the ANN window and providing information on the SA alarm on the intermediate operation display screen, for example, the information can be shared between the emergency countermeasure building and the power generation unit building. Further, for example, support information related to SA alarms can be provided to an external system such as a process computer or off-site, thereby enabling comprehensive support for recovery operations in the event of a severe accident.

[Other Embodiments]
As mentioned above, although several embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. For example, the features of the embodiments may be combined. Furthermore, these embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

  DESCRIPTION OF SYMBOLS 1a, 1b, 1c, 1d, 1e ... Severe accident support monitoring device, 2 ... Signal distribution device, 3 ... Screen switching device, 4 ... Middle operation display screen, 5 ... ANN (announcer) board, 6 ... External system, 7e ... Severe accident support monitoring system, 8e ... plant monitoring system, 10 ... measurement signal, 11 ... signal input processing unit, 12 ... signal distribution processing unit, 13 ... signal reception processing unit, 14 ... safety / alternative system signal extraction information DB (Database), 15 ... system signal extraction unit, 16 ... safety / alternative system data storage unit, 17a, 17b, 17c, 17d, 17e ... SA (severe accident) determination processing unit, 18 ... system activation condition / schedule prediction unit, 19: System activation condition / schedule data storage unit, 20a, 20b ... Distribution signal, 21 ... Monitoring / signal priority determination recording unit, 22 ... Monitoring / signal priority Degree database, 23 ... monitoring / signal priority data storage unit, 24 ... recovery guidance display unit, 31a ... SA alarm determination value storage unit, 31b, 31e ... SA alarm determination value setting unit, 32 ... elapsed time data recording unit, 33 ... SA alarm judgment value switching unit, 34c, 34d ... Alarm judgment processing unit, 35 ... Alarm status display unit, 41 ... Signal input history storage unit, 42 ... Safety / alternative system status history storage unit, 43 ... Alarm return status learning unit 44 ... Safety / alternative system state storage unit at alarm return, 45 ... Recovery information display unit, 51 ... Alarm judgment value switching unit, 52 ... SA alarm judgment value receiving unit, 53 ... ANN judgment value storage unit, 54 ... ANN judgment Processing unit 55 ... ANN notification processing unit 56 ... Alarm determination value switching request processing unit 57 ... SA alarm determination value transmission unit 58 ... SA dedicated ANN information processing unit 59 ... Other processing unit 100 ... Plant monitoring 110: System information display unit, 170: Determination output, 171, 172, 173 ... Logic, 174 ... SA determination result, 191 ... System activation condition / schedule data, 240 ... Recovery guidance screen, 241-224, 2421, 2422 ... guidance data, 410 ... SA dedicated ANN screen, 450 ... recovery history data display screen, 451 to 4512, 4521, 4522 ... guidance data, 1102 ... signal reception processing unit, 1103 ... signal alarm determination unit, 1104 ... signal alarm determination information DB, 1105 ... alarm information display section, 4501 ... recovery history data reference button

Claims (15)

A severe accident support monitoring device that supports a plant monitoring device that inputs measurement signals output from a plurality of measuring devices installed in a plant having a plant facility related to a safety system and an alternative system, and monitors the plant,
A signal reception processing unit for receiving at least a part of the measurement signals input to the plant monitoring device;
A safety / alternative system signal extraction information database for storing safety / alternative system signals included in the measurement signal and safety / alternative system data including monitoring items in the plant equipment in association with each other for each safety system and alternative system; ,
With reference to the safety / alternative system signal extraction information database, the safety / alternative system signal is identified from the measurement signal received by the signal reception processing unit, and the safety / alternative system signal associated with the identified safety / alternative system signal is identified. A system signal extraction unit that extracts safety / alternative system data and adds monitoring content corresponding to the monitoring item;
A safety / alternative system data storage unit for storing the safety / alternative system data to which the monitoring content is added by the system signal extraction unit;
A severe accident determination processing unit that inputs the measurement signal from the signal reception processing unit and determines a severe accident for the plant by a predetermined logic determination process using the input measurement signal;
System startup related to the safety system and the alternative system based on the result of the logic determination process determined by the severe accident determination processing unit and the safety / alternative system data stored in the safety / alternative system data storage unit A system activation condition / schedule prediction unit that determines whether a condition and its system activation condition are established, or predicts an activation time at which each of the systems included in the safety system and the alternative system can be activated;
A system information display unit that displays the system start condition determined by the system start condition / schedule prediction unit and whether or not the system start condition has been established or the predicted start time, and the safety / alternative system data. Support monitoring device in case of severe accident characterized by. It is classified into the monitoring priority hierarchy of plant safety health and system health, the monitoring priority of the monitoring target is stored for each monitoring priority hierarchy, and the measurement signal of the monitoring target is associated with each monitoring priority hierarchy. A monitoring / signal priority database in which signal priorities are stored;
Based on the monitoring priority and the signal priority stored in the monitoring / signal priority database for the measurement signal used in the logic determination processing when the severe accident determination processing unit determines that the serious accident is detected. A monitoring / signal priority determination recording unit that records the monitoring content related to the measurement signal to be monitored according to the priority order;
A monitoring / signal priority data storage unit for storing the monitoring content related to the measurement signal to be monitored recorded by the monitoring / signal priority determination recording unit;
The recovery guidance display part which displays the recovery guidance containing the information for recovering the said plant from the said severe accident, when it determines with the said severe accident, It further has, The severe of Claim 1 characterized by the above-mentioned. Accident support monitoring device. An SA alarm determination value storage unit that stores at least an SA alarm determination value corresponding to the severe accident progress stage for each measurement signal used in the logic determination process;
An SA alarm determination value switching unit that switches the SA alarm determination value for the measurement signal used in the logic determination process according to the progress stage of the severe accident;
An SA alarm determination value setting unit that sets the SA alarm determination value for the measurement signal switched by the SA alarm determination value switching unit as a current SA alarm determination value;
Alarm determination for determining whether or not there has been an input deviating from the current SA alarm determination value for the measurement signal used for the logic determination processing, using the current SA alarm determination value set in the SA alarm determination value setting unit An alarm determination processing unit for performing
An alarm state display unit that displays a result of the alarm determination by the alarm determination processing unit for each measurement signal used in the logic determination process;
The result of the alarm determination is an SA alarm when there is an input that deviates from the current SA alarm determination value, and is normal when there is no input that deviates from the current SA alarm determination value. The severe accident support monitoring apparatus according to claim 2. A signal input history storage unit for storing a signal history in a period from the SA alarm state to the normal state for each measurement signal;
Safety / alternative for extracting and storing the safety / alternative system data from the safety / alternative system data storage unit in the recovery period from when it is determined that the plant is determined to be a severe accident to when it is determined to be recovery from the severe accident A system state history storage unit;
An alarm return safety / alternative system state storage unit for storing the safety / alternative system data in the recovery period from the past severe accident to the determination of recovery;
When the SA alarm occurs, the alarm return state for extracting the safety / alternative system data in the recovery period from the safe / alternative system state storage unit at the time of alarm recovery until it is determined that the past severe accident has been recovered. The learning department,
A recovery information display unit that displays the safety / alternative system data extracted by the alarm return state learning unit;
The alarm return state learning unit, after being determined to be recovered from the severe accident, after the determination of the severe accident for the plant until the recovery from the severe accident is determined to be the safety / alternative 4. The severe accident support monitoring apparatus according to claim 3, wherein system data is stored in the alarm recovery safety / alternative system state storage unit. 5. The severe accident support monitoring device is connected to an ANN panel that processes alarms related to the plant,
An alarm for giving permission to switch the SA alarm determination value to the SA alarm determination value switching unit in response to a request for switching the alarm determination value from the ANN board, and an alarm determination value to be set for the plant-related alarm A judgment value switching request processing unit;
An SA alarm determination value transmission unit capable of transmitting the current SA alarm determination value to the ANN board;
When the warning judgment value switching request processing section receives permission to switch the SA warning judgment value, the SA warning judgment value switching section switches the SA warning judgment value, and the SA warning judgment value transmission section sends the current SA. The alarm judgment value is transmitted to the ANN board. The severe accident support monitoring apparatus according to claim 3 or 4, wherein the alarm judgment value is transmitted to the ANN board. The severe accident support monitoring device is connected to a screen switching device for switching the display of a middle operation display screen installed in the plant,
An SA dedicated ANN information processing unit that generates SA dedicated ANN display data indicating whether or not an SA alarm has occurred in the ANN panel, and transmits an image switching request signal to the screen switching device together with the SA dedicated ANN display data; Prepared,
The SA dedicated ANN information processing unit, when the SA alarm determination value transmitting unit transmits the current SA alarm determination value as the alarm determination value of the ANN board, via the screen switching device, the intermediate operation. 6. The severe accident support monitoring apparatus according to claim 5, wherein the SA dedicated ANN display data is transmitted to a display screen, and a display based on the SA dedicated ANN display data is displayed on the intermediate operation display screen. The severe accident support monitoring device is further communicably connected to an external system,
7. The severe accident support according to claim 5, wherein the SA alarm determination value transmitting unit transmits the plant alarm and the current SA alarm determination value corresponding to the plant alarm to the external system. Monitoring device. The severe accident support monitoring apparatus according to claim 7, wherein the external system is an off-site center. The severe accident support monitoring apparatus according to claim 7, wherein the external system is a process computer. The plant is provided with a signal distribution device that distributes at least a part of the measurement signals before the measurement signals input to the plant monitoring device are input to the plant monitoring device,
10. The severe accident support monitoring according to claim 1, wherein the signal reception processing unit receives the at least a part of the measurement signals distributed from the signal distribution device. apparatus. Supporting a plant monitoring device for monitoring the plant by inputting measurement signals output from a plurality of measuring devices installed in a plant having a plant facility related to a safety system and an alternative system, for each of the safety system and the alternative system Severe accident support monitoring equipment having a safety / alternative system signal extraction information database that stores safety / alternative system signals included in measurement signals and safety / alternative system data including monitoring items in the plant equipment in association with each other An accident support monitoring method,
The severe accident support monitoring device receives a measurement signal of at least a part of the measurement signal input to the plant monitoring device; and
The severe accident support monitoring apparatus identifies the safety / alternative system signal from the measurement signal received in the signal reception processing step based on the safety / alternative system signal extraction information database, and identifies the identified safety / A system signal extraction step of extracting the safety / alternative system data associated with the alternative system signal and adding monitoring content corresponding to the monitoring item;
A safety / alternative system data storage step in which the severe accident support monitoring device stores the safety / alternative system data to which the monitoring content is added in the system signal extraction step;
The severe accident support monitoring apparatus determines a severe accident for the plant by a predetermined logic determination process using the measurement signal input in the signal reception process step, and a severe accident determination process step;
The severe accident support monitoring device is based on the result of the logic determination process determined in the severe accident determination process step and the safety / alternative system data stored in the safety / alternative system data storage step, A system activation condition / schedule for determining a system activation condition regarding the safety system and the alternative system and whether or not the system activation condition is satisfied, or predicting an activation time at which each of the systems included in the safety system and the alternative system can be activated A prediction step;
The severe accident support monitoring device displays the system start condition determined in the system start condition / schedule prediction step, whether or not the system start condition is satisfied or the predicted start time, and the safety / alternative system data. A system information display step, and a severe accident support monitoring method. A severe accident support monitoring device for supporting a plant monitoring device for monitoring the plant by inputting measurement signals output from a plurality of measuring devices installed in a plant having a plant facility related to a safety system and an alternative system, and the severe A severe accident support monitoring system comprising an ANN panel connected to an accident support monitoring device and capturing and processing alarms related to the plant,
The severe accident support monitoring device is:
A signal reception processing unit for receiving at least a part of the measurement signals input to the plant monitoring device;
A safety / alternative system signal extraction information database for storing safety / alternative system signals included in the measurement signal and safety / alternative system data including monitoring items in the plant equipment in association with each other for each safety system and alternative system; ,
Based on the safety / alternative system signal extraction information database, the safety / alternative system signal is identified from the measurement signal received by the signal reception processing unit, and the safety associated with the identified safety / alternative system signal is identified. A system signal extraction unit that extracts alternative system data and adds monitoring content corresponding to the monitoring item;
A safety / alternative system data storage unit for storing the safety / alternative system data to which the monitoring content is added by the system signal extraction unit;
A severe accident determination processing unit that inputs the measurement signal from the signal reception processing unit and determines a severe accident for the plant by a predetermined logic determination process using the input measurement signal;
System startup related to the safety system and the alternative system based on the result of the logic determination process determined by the severe accident determination processing unit and the safety / alternative system data stored in the safety / alternative system data storage unit A system activation condition / schedule prediction unit that determines whether a condition and its system activation condition are established, or predicts an activation time at which each of the systems included in the safety system and the alternative system can be activated;
A system information display unit for displaying the system activation condition determined by the system activation condition / schedule prediction unit and whether the system activation condition is established or the predicted activation time, and the safety / alternative system data;
An SA alarm determination value storage unit that stores at least an SA alarm determination value corresponding to the severe accident progress stage for each measurement signal used in the logic determination process;
An SA alarm determination value switching unit that switches the SA alarm determination value for the measurement signal used in the logic determination process according to the progress stage of the severe accident;
An SA alarm determination value setting unit that sets the SA alarm determination value for the measurement signal switched by the SA alarm determination value switching unit as a current SA alarm determination value;
An alarm for determining whether or not there is an input deviating from the current SA alarm determination value for the measurement signal used for the logic determination process, using the current SA alarm determination value set in the SA alarm determination value setting unit An alarm judgment processing unit for making judgments;
In response to a request for switching the alarm determination value from the ANN board, an alarm determination value set for the plant-related alarm, the current SA alarm determination value according to the progress stage of the severe accident and the severe accident An alarm determination value switching request processing unit that can be switched to any one of the normal alarm determination values according to the normal plant before reaching
An SA alarm determination value transmission unit capable of transmitting the current SA alarm determination value to the ANN board;
The ANN board is
An ANN determination value storage unit for storing an ANN determination value for each alarm;
An alarm that transmits a determination value switching request signal to the severe accident support monitoring device when switching from the normal alarm determination value corresponding to normal operation of the plant to the SA alarm determination value corresponding to the severe accident A judgment value switching unit;
The transmission data including the current SA alarm determination value and the alarm determination value switching permission is received from the SA alarm determination value transmission unit, and the ANN determination value stored in the ANN determination value storage unit based on the received transmission data An SA alarm judgment value receiving unit to update or add part or all of
Using the ANN determination value stored in the ANN determination value storage unit, an ANN determination processing unit that performs alarm determination for output to the ANN window;
An ANN notification processing unit that receives a result of the alarm determination from the ANN determination processing unit and performs an alarm output process on the ANN window;
The SA alarm determination value transmission unit transmits the current SA alarm determination value to the ANN board when the alarm determination value switching request processing unit receives a request to switch from the ANN board to the current SA alarm determination value. A support system for severe accidents. The severe accident support monitoring system is further connected to an external system,
13. The severe accident support monitoring system according to claim 12, wherein an SA alarm and the SA alarm determination value are notified to the external system. The severe accident support monitoring system according to claim 12, wherein the external system is an off-site center. A plant monitoring device that monitors a plant having plant facilities related to a safety system and an alternative system, a severe accident support monitoring device that supports the plant monitoring device, and an alarm related to the plant that is connected to the severe accident support monitoring device A plant monitoring system comprising an ANN board for capturing and processing,
The plant monitoring device inputs measurement signals output from a plurality of measuring devices installed in the plant and monitors the plant,
The severe accident support monitoring device is:
A signal reception processing unit for receiving at least a part of the measurement signals input to the plant monitoring device;
A safety / alternative system signal extraction information database for storing safety / alternative system signals included in the measurement signal and safety / alternative system data including monitoring items in the plant equipment in association with each other for each safety system and alternative system; ,
Based on the safety / alternative system signal extraction information database, the safety / alternative system signal is identified from the measurement signal received by the signal reception processing unit, and the safety associated with the identified safety / alternative system signal is identified. A system signal extraction unit that extracts alternative system data and adds monitoring content corresponding to the monitoring item;
A safety / alternative system data storage unit for storing the safety / alternative system data to which the monitoring content is added by the system signal extraction unit;
A severe accident determination processing unit that inputs the measurement signal from the signal reception processing unit and determines a severe accident for the plant by a predetermined logic determination process using the input measurement signal;
System startup related to the safety system and the alternative system based on the result of the logic determination process determined by the severe accident determination processing unit and the safety / alternative system data stored in the safety / alternative system data storage unit A system activation condition / schedule prediction unit that determines whether a condition and its system activation condition are established, or predicts an activation time at which each of the systems included in the safety system and the alternative system can be activated;
A system information display unit for displaying the system activation condition determined by the system activation condition / schedule prediction unit and whether the system activation condition is established or the predicted activation time, and the safety / alternative system data;
An SA alarm determination value storage unit that stores at least an SA alarm determination value corresponding to the severe accident progress stage for each measurement signal used in the logic determination process;
An SA alarm determination value switching unit that switches the SA alarm determination value for the measurement signal used in the logic determination process according to the progress stage of the severe accident;
An SA alarm determination value setting unit that sets the SA alarm determination value for the measurement signal switched by the SA alarm determination value switching unit as a current SA alarm determination value;
An alarm for determining whether or not there is an input deviating from the current SA alarm determination value for the measurement signal used for the logic determination process, using the current SA alarm determination value set in the SA alarm determination value setting unit An alarm judgment processing unit for making judgments;
In response to a request for switching the alarm determination value from the ANN board, an alarm determination value set for the plant-related alarm, the current SA alarm determination value according to the progress stage of the severe accident and the severe accident An alarm determination value switching request processing unit that can be switched to any one of the normal alarm determination values according to the normal plant before reaching
An SA alarm determination value transmission unit capable of transmitting the current SA alarm determination value to the ANN board;
The ANN board is
An ANN determination value storage unit for storing an ANN determination value for each alarm;
An alarm that transmits a determination value switching request signal to the severe accident support monitoring device when switching from the normal alarm determination value corresponding to normal operation of the plant to the SA alarm determination value corresponding to the severe accident A judgment value switching unit;
The transmission data including the current SA alarm determination value and the alarm determination value switching permission is received from the SA alarm determination value transmission unit, and the ANN determination value stored in the ANN determination value storage unit based on the received transmission data An SA alarm judgment value receiving unit to update or add part or all of
Using the ANN determination value stored in the ANN determination value storage unit, an ANN determination processing unit that performs alarm determination for output to the ANN window;
An ANN notification processing unit that receives a result of the alarm determination from the ANN determination processing unit and performs an alarm output process on the ANN window;
The SA alarm determination value transmission unit transmits the current SA alarm determination value to the ANN board when the alarm determination value switching request processing unit receives a request to switch from the ANN board to the current SA alarm determination value. A plant monitoring system characterized by that.

Images