RETROFITTING METHOD FOR A GAS TURBINE

The method for retrofitting a gas turbine comprises providing a supply of fuel being hydrogen or a mixture containing hydrogen for a first combustion area (8), providing a supply of fuel being hydrogen or a mixture containing hydrogen for a second combustion area (13), providing a supply of water for the first combustion area (8) if not present, providing a controller arranged for receiving at least a control parameter indicative of the reactivity of the mix of hydrogen or mixture containing hydrogen and first hot gas at the second combustion area and regulating the amount of water supplied to the first combustion area based on the at least a control parameter.