PLANT OPERATION ASSISTANCE DEVICE AND PLANT OPERATION ASSISTANCE METHOD OF A NUCLEAR POWER PLANT

A nuclear power plant operation support device, comprising: a virtual plant creation unit for acquiring operating state data on an actual plant, simulating the actual plant and creating a virtual plant; a reference data storage unit for storing in advance reference data for creating the virtual plant conforming to various operating states of the actual plant; an operating state monitoring unit for monitoring the operating state of the actual plant and sending the operating state data on the actual plant to the virtual plant creation unit, while acquiring from the reference data storage unit the reference data corresponding to the operating state, if occurs, in the operating state of the actual plant and sending the reference data to the virtual plant creation unit; an operating state prediction unit for creating a predicted virtual plant in which an operating state after a lapse of arbitrary time is predicted by accelerating the operating state of the virtual plant created by the virtual plant creation unit at an arbitrary speed, the operating state after the lapse of arbitrary time being predicted by the operating state prediction unit; and an operating state displaying unit for displaying the operating state of the actual plant and the operating state of the predicted virtual plant on an operating state displaying unit.