Abstract: A DC circuit breaker 25a includes: a parallel connection part formed of a mechanical switch 40 and a semiconductor switch 44; and a switch control unit 39 which is connected in series to one side of the parallel connection part. The switch control unit 39 detects a main current value i separately from an external equipment-side breaking control device 12, and, when the main current value i is greater than or equal to a threshold ?, the switch control unit 39 initiates a breaking operation without having to wait for a tripping signal from the equipment-side breaking control device 12. In this 10 breaking operation, the mechanical switch 40 is switched from on to off after the semiconductor switch 44 has been switched from off to on.

Abstract: A nuclear-power-plant computer-based procedure display device is disposed in a main control room of a nuclear power plant, and includes a operating procedure storage unit that stores a computer-based procedure in which plant operation procedures of the nuclear power plant are divided into procedure steps and listed, a operating procedure display unit that displays the computer-based procedure, and a operating procedure display control unit that controls display of the computer-based procedure. In a case where the procedure step displayed on the operating procedure display unit is selected by an operator, the operating procedure display control unit displays an indication that the procedure step is selected, on the operating procedure display unit.

Abstract: A condition determination system includes: an operation condition data obtaining unit that obtains operation condition data indicating an operation condition of a facility; and a determination unit that determines, based on the operation condition data, a level of a phenomenon that occurs due to the operation condition of the facility.

Abstract: A nuclear-power-plant computer-based procedure display device is disposed in a main control room of a nuclear power plant, and includes a operating procedure storage unit that stores a computer-based procedure in which plant operation procedures of the nuclear power plant are divided into procedure steps and listed, a operating procedure display unit that displays the computer-based procedure, and a operating procedure display control unit that controls display of the computer-based procedure. In a case where the procedure step displayed on the operating procedure display unit is selected by an operator, the operating procedure display control unit displays an indication that the procedure step is selected, on the operating procedure display unit.

Abstract: A nuclear-power-plant computer-based procedure display device is disposed in a main control room of a nuclear power plant, and includes a operating procedure storage unit that stores a computer-based procedure in which plant operation procedures of the nuclear power plant are divided into procedure steps and listed, a operating procedure display unit that displays the computer-based procedure, and a operating procedure display control unit that controls display of the computer-based procedure. In a case where the procedure step displayed on the operating procedure display unit is selected by an operator, the operating procedure display control unit displays an indication that the procedure step is selected, on the operating procedure display unit.

Abstract: A work planning system includes an event-data acquisition unit that acquires event data indicating an event of a facility, a storage unit that stores therein a plurality of pieces of work data indicating contents of works that can be performed with respect to the facility, and a decision unit that decides each importance degree of a plurality of pieces of work data based on the event data.

Abstract: An article-arrangement planning system includes a display controller configured to instruct a display device to display article data indicating a plurality of articles to be arranged in case of emergency; and an arrangement-status-data acquisition unit configured to acquire arrangement status data indicating each arrangement status of each article of the plurality of articles. The arrangement status data includes target amount data indicating a target amount of each of the plurality of articles and expected arrival time data indicating an expected time of arrival of each of the plurality of articles. The display controller is configured to instruct the display device to display the article data in association with the arrangement status data.

Abstract: An apparatus includes an image capturing device, a display, a storage, and a controller. In the storage, for an alarm window having plural lit portions that indicate alarms for plural items by lighting, position information and procedure information are stored beforehand, the position information associating a layout of the lit portions, with the respective items, the procedure information being handling procedures for the respective items corresponding to the respective lit portions. The controller displays the alarm window image-captured by the image capturing device on the display, causes an on-display position of any of the lit portions that has been lit to be selectable, and if the on-display position of the lit portion that has been lit is selected, reads out procedure information of the item corresponding to the lit portion from the storage and displays the procedure information on the display.

Abstract: To provide a route planning system including a route-status-data acquisition unit that acquires route status data indicating a status of a basic route for moving a support facility from a standby position to a predetermined position in case of emergency of an existing facility, and a generation unit that generates alternative route data indicating an alternative route for moving the support facility to the predetermined position based on the route status data.

Abstract: A design process support system includes a concept database that stores concepts for different design conditions, wherein the concepts include specification items and information indicating an improvement or deterioration of the specification items so as to be associated with each other, and an improvement support unit that determines the specification item desired to be improved by a user and informs of a concept of a design condition under which the determined specification item is improved.

Abstract: A display generating device includes an acquiring unit configured to acquire multiple pieces of event data, each of which being provided with time information and identification information indicating which one of multiple categories related to a facility the event data belongs to, and a generating unit configured to generate display data by arraying the multiple pieces of the event data in time series based on the time information for each of the categories depending on the identification information.

Abstract: An emergency decision-making assistance system includes an information management unit operable to generate display data on the basis of emergency information and to share the emergency information via a network; a display unit operable to display a plurality of pieces of the display data generated by the information management unit; a console unit operable to switch between the plurality of pieces of display data displayed on the display unit; and a database configured to store the plurality of pieces of display data generated by the information management unit. Decision-making is thereby effectively assisted by obtaining only necessary information in a plurality of sites.

Abstract: A nuclear-power-plant computer-based procedure display device is disposed in a main control room of a nuclear power plant, and includes a operating procedure storage unit that stores a computer-based procedure in which plant operation procedures of the nuclear power plant are divided into procedure steps and listed, a operating procedure display unit that displays the computer-based procedure, and a operating procedure display control unit that controls display of the computer-based procedure. In a case where the procedure step displayed on the operating procedure display unit is selected by an operator, the operating procedure display control unit displays an indication that the procedure step is selected, on the operating procedure display unit.

Abstract: A plant operation assistance system includes: a data obtaining unit-configured to obtain monitoring data indicating state quantity of a plant, the state quantity being detected by a sensor; an identifying unit configured to identify, based on the state quantity, a probability distribution of the monitoring data; a model generation unit configured to generate, based on a plant parameter composed from a database including design information of the plant, a stochastic model of the plant; a data processing unit configured to assign the probability distribution to the monitoring data obtained by the data obtaining unit; and a prediction unit configured to input the monitoring data assigned with the probability distribution, into the stochastic model, and predicts a state of the plant.

Abstract: An apparatus includes an image capturing device, a display, a storage, and a controller. In the storage, for an alarm window having plural lit portions that indicate alarms for plural items by lighting, position information and procedure information are stored beforehand, the position information associating a layout of the lit portions, with the respective items, the procedure information being handling procedures for the respective items corresponding to the respective lit portions. The controller displays the alarm window image-captured by the image capturing device on the display, causes an on-display position of any of the lit portions that has been lit to be selectable, and if the on-display position of the lit portion that has been lit is selected, reads out procedure information of the item corresponding to the lit portion from the storage and displays the procedure information on the display.

Abstract: A display generating device includes an acquiring unit configured to acquire multiple pieces of event data, each of which being provided with time information and identification information indicating which one of multiple categories related to a facility the event data belongs to, and a generating unit configured to generate display data by arraying the multiple pieces of the event data in time series based on the time information for each of the categories depending on the identification information.

Abstract: A work planning system includes an event-data acquisition unit that acquires event data indicating an event of a facility, a storage unit that stores therein a plurality of pieces of work data indicating contents of works that can be performed with respect to the facility, and a decision unit that decides each importance degree of a plurality of pieces of work data based on the event data.

Abstract: A condition determination system includes: an operation condition data obtaining unit that obtains operation condition data indicating an operation condition of a facility; and a determination unit that determines, based on the operation condition data, a level of a phenomenon that occurs due to the operation condition of the facility.

Abstract: To provide a route planning system including a route-status-data acquisition unit that acquires route status data indicating a status of a basic route for moving a support facility from a standby position to a predetermined position in case of emergency of an existing facility, and a generation unit that generates alternative route data indicating an alternative route for moving the support facility to the predetermined position based on the route status data.

Abstract: An emergency decision-making assistance system includes an information management unit operable to generate display data on the basis of emergency information and to share the emergency information via a network; a display unit operable to display a plurality of pieces of the display data generated by the information management unit; a console unit operable to switch between the plurality of pieces of display data displayed on the display unit; and a database configured to store the plurality of pieces of display data generated by the information management unit. Decision-making is thereby effectively assisted by obtaining only necessary information in a plurality of sites.