Abstract
The total space and weight of the feedwater heaters in Nuclear Power Plant (NPP) can be reduced by replacing low-pressure feedwater heaters with the high-efficiency Steam Injectors (SI). The SI works as a direct heat exchanger between feedwater from condensers and extracted steam from turbines. It can get higher pressure than supplied steam pressure. The maintenance cost is lower than that of the current feedwater heater because of its simplified system without movable parts. This paper describes the analysis of the heat balance and plant efficiency of this Innovative-Simplified NPP with high efficiency SI. The plant efficiencies of the Innovative-Simplified BWR with SI are compared with those of the 1100MWe-class BWR. The SI model is adapted into the heat balance simulator with a simple model. The results show the plant efficiencies of the Innovated-Simplified BWR with SI are almost equal to the original BWR.
