A model of the cycle was created in commercially available software \cite{Hysys}---see Fig. \ref{856013}). The model generates quite precise results with average error of 8%. The system is characterized by electrical efficiency of 33.74% with a power rate of 1090 MWe.
Integration of O=SOE with nuclear steam turbine cycle
The high temperature electrolyzer based on ion-transporting electrolyte features a solid oxide electrochemical cell composed of three layers (see Fig. \ref{437284}). The porous electrodes \cite{Das_2019,Nakakura_2019,Haj_Ibrahim_2019,Haverkort_2019}, namely the air electrode (anode) and fuel electrode (cathode), are physically separated by a dense electrolyte which also plays the role of electrical insulator.
The working temperature of O=SOE can be controlled by a stream of air fed to the anode side of the electrolyzer. The amount was adjusted to keep the electrolyzer working temperature at the level of 740\(^{\circ}\)C. The value was chosen for the purpose of making a comparison between H+SOE and O=SOE. In the case of H+SOE, it is not possible to readily control the temperature. Thus, this O=SOE temperature was set the same as H+SOE.