Patent ID: 7596947

Claim:
A gas turbine plant comprising: a high-temperature gas-cooled reactor which warms a coolant by thermal energy being obtained by nuclear fission of clad fission products in coated-particle fuels; a number “n” of first gas turbines in series that are rotated by the coolant being warmed by the high-temperature gas-cooled reactor and share same shafts with compressors compressing the coolant; a second gas turbine that is rotated by the coolant being discharged from the last of the “n” first gas turbines serving as a last stage after rotating each of the “n” first gas turbines and shares a same shaft with a generator performing electrical power generation operation; and a number “n−1” of bypass flow passages with bypass valves that bypass each of corresponding “n−1” first gas turbines to a position downstream of the corresponding first gas turbine, excluding the first gas turbine in a first stage being closest to the high-temperature gas-cooled reactor, among the “n” first gas turbines; wherein, during start-up, by controlling a lift of the “n−1” bypass valves, each of the “n” first gas turbines has rotating speed thereof increased up to a rated rotating speed shaft by shaft sequentially, starting from the first gas turbine in a first stage.