of steam however because the startup cooling steam generator does not comprise a flash tank in which to collect impurities such as iron oxides alternative methods of excluding oxides were designed into the inventive startup cooling steam generator 36 in the presently preferred embodiment the boiler tubing 50 as well as the ducts 34 38 between the polishers 30 32 and the combustion turbine 42 as shown in fig2 are manufactured from a non oxidizing material such as stainless steel this design eliminates the need for the flash tank and in so doing remains consistent with the desired minimal mass architecture the steam used to cool the combustion turbine must be dry steam a two phased mixture of water and steam would expose the combustion turbine 2 to thermal shocks and potentially over stress or fatigue the cooled parts dry steam can be recognized as having at least 25 u00b0 f superheat only when the steam is dry should it be routed to the combustion turbine 2 for use in cooling therefore any steam or water which is located in the startup cooling steam generator 36 upon startup should be recycled back to the condenser 14 until the steam generated by the startup cooling steam generator 36 is superheated during startup a first valve 40 as shown in fig2 is closed and a second valve 53 is open so as to route the non superheated steam back to the condenser 14 when it is certain that the steam is superheated the first valve 40 is opened and the second valve 53 is closed allowing the steam to be routed to the combustion turbine 42.