or a 9 series heavy duty gas turbine engine and the like the gas turbine engine 10 may have different configurations and may use other types of components other types of gas turbine engines also may be used herein multiple gas turbine engines other types of turbines and other types of power generation equipment also may be used herein together fig2 is an example of a nozzle 55 that may be used with the turbine 40 described above generally described the nozzle 55 may include a nozzle vane 60 that extends between an inner platform 65 and an outer platform 70 a number of the nozzles 55 may be combined into a circumferential array to form a stage with a number of rotor blades not shown the nozzle 55 also may include an impingement cooling system in the form of an impingement plenum 80 the impingement plenum 80 may have a number of impingement apertures 85 formed therein the impingement plenum 80 may be in communication with a flow of air 20 from the compressor 15 or another source via a cooling conduit 90 the flow of air 20 flows through the nozzle vane 60 into the impingement plenum 80 and out via the impingement apertures 85 so as to impingement cool a portion of the nozzle 55 or elsewhere other types of impingement plenums 80 are known many other types of impingement cooling systems are known these known impingement cooling systems however generally are uniformly sized and shaped as described above alternatively.