A gas turbine system includes a plenum that includes an inlet and an outlet. The inlet is configured to receive a flow of oxidant and the outlet is configured to direct the flow of oxidant in a downstream direction. Additionally, a support system is coupled to the plenum and to a cone. The support system enables the cone to move along the support system from a first position to a second position. The cone includes an upstream end and the upstream end is removably coupled to the outlet of the plenum in the first position. When the cone is in the first position, the cone is configured to direct the flow of oxidant in the downstream direction to a gas turbine engine. The upstream end is disposed upstream of the outlet and is decoupled from the outlet when the cone is in the second position.