Gas-turbine power plant

The invention relates to a method of operating a gas-turbine power plant, essentially comprising a device for compressing an oxygen-containing gas, at least one combustion chamber for heating the compressed gas, at least one gas turbine in which the hot gas produced is expanded to perform work, a flow path in which the expanded hot gas, if need be while passing a number of further working stages for energy and/or material recycling, such as, for example, a waste heat boiler for the generation of steam, is fed to an outlet into the atmosphere. Furthermore, the invention relates to a corresponding gas-turbine power plant. A method of operating a gas-turbine power plant is described, having a gas-turbine plant () in which an oxygen-containing gas is drawn in, compressed and fired and, after passing through a turbine stage, is fed as discharging hot gas () to a waste heat boiler (), from which the cooled exhaust gas () is fed to an outlet () and then to the free atmosphere. The invention is characterized in that a specific reduction in the flow velocity with which the exhaust gas () flows through the outlet () is effected in the region of the latter, with a simultaneous pressure increase downstream in the outlet (), and in that the pressure conditions occurring inside the outlet () are transmitted free of losses between the gas turbine () and the outlet () via a gas-tight flow path of the hot and exhaust gases ().