Gas turbine power generation system using a fast reactor

not registered; Haga, Kazuo; Sekiguchi, Nobutada

[Objective] Study on the concept of a fast reactor gas turbine cogeneration system used near a small town, where there are not a large number of engineers, in a cold district distant from a large city. [Method] The population of the small town is supposed 200 to 2000 thousands. The study was performed on three kinds of plant systems, that is, 100, 50 and 10 MWe's. The design of a high temperature fast reactor previously studied for hydrogen production was used for a primary system. A closed Brayton cycle (CBC) was adopted for the secondary system to generate electric power. These plant systems have not the accident occurence possibility of sodium-water reaction since a steam turbine is not used for electric power generation. Water treatment is not necessary, too. In order that the gas turbine system has high thermal efficiency, the reactor vessel coolant outlet temperature is desirable to be high. Therefore the temperature was set to be 650 to 700C which is considered the highest temperature attained by steel and nickel alloy structural material. The temperature is higher than that of usual FBR's by 100 to 150C. Exhausted heat from the closed Brayton cycle is used for cogenration like district heating. [Result] The following plant systems were found to be possible from the conceptual design study on the above three kinds of power scale plants. [100 and 50MWe systems] Both systems adopted two loops for primary system. The former adopted four loops design and the latter two loops design for the secondary system, respectively. The reactor coolant temperature was 700C at the reactor outlets for both systems. An non-intercooling type compressor was used in the secondary system. The thermal efficiency of the CBC was about 24%. The scales of the building containing the secondary system were 31m in width, 40m in depth and 30m in height for the former and 31m in width, 22m in depth and 30m in height for the latter. [10MWe system] A ...