Abstract: A design support apparatus displays components of a design object on a display screen in the same positional relationship as that of actual layout, and graphically displays an installation inhibit area for the components which is derived from the design object or its components, on the display scree. An operator may design the layout while he/she looks as the display screen to designate installation position of the components so that they do not enter into the installation inhibit area. The installation inhibit area displayed on the screen may be a minimal space from a wall of the component or a working space for the component.

Abstract: This invention refers to a plant operating method for overcoming an abnormal status of a plant. A plant data is detected from the plant, and all plant state members indicating an abnormality of the plant are identified from the plant data. The plant operating method includes estimating a cause whereby the plant status members are produced, predicting all plant status members arising after passing a given period of time according to the estimated cause, determining whether or not actual plant status members are present in the plant state members predicted and when the latter members are not present in the former members, repeatedly carrying out the processing of the steps of estimating and predicting to which the plant status members forecasted at the predicting step are inputted until all the actual plant status members come to exist in the plant status members forecasted at the predicting step.

Abstract: A power change operating method of a boiling water reactor, in which an operation allowable range is defined by the relation between xenon and iodine concentrations, the present concentrations is compared with the allowable range, and the core flow is controlled so that the concentrations after the change can be included within the allowable range.

Abstract: This invention refers to a .[.plant operating.]. method .Iadd.and apparatus for guidance of an operation .Iaddend.for overcoming an abnormal status of a plant. A plant data is detected from the plant, and all plant state members indicating an abnormality of the plant are identified from the plant data. The plant operating method .Iadd.and apparatus .Iaddend.includes .Iadd.apparatus for .Iaddend.