Abstract
We propose a new closed cycle oxy-fuel gas turbine power plant that utilizes a nuclear heat generator. A pressurized water
reactor (PWR) is designed to supply saturated steam to an oxy-fuel gas turbine for a specific power output increase. The
saturated steam from the reactor can have lower pressure and temperature than those of an existing PWR. In this study, we
estimated plant performances from a heat balance model based on a conceptual design of a hybrid plant for different inlet
pressures of the gas turbine. The generating efficiency of an oxy-fuel gas turbine plant without a nuclear steam generator is
estimated to be less than 35%. In contrast, the proposed plant has more than 40% of the whole generating efficiency. In the
proposed plant, the power output contributed by a PWR is obtained by subtracting the LNG contribution from the whole
power output. Supposing the generating efficiency of the LNG system in the proposed plant equals to that of the conventional
plant, the efficiency of PWR system contributing to increase the generating performances of the proposed plant is estimated
to be around 45%, even if the steam conditions are lower than in an existing PWR.
