A method and gas turbine combustion system for safely mixing H2-rich fuels with air

A method for safely mixing H2-rich fuels with air in a gas turbine combustion system (20), comprises the steps of: €¢ providing a first stream of burner air and a second stream of a H2-rich fuel; €¢ premixing all of the fuel with a portion of said burner air to produce a pre-premixed fuel/air mixture (21); and €¢ injecting this pre-premixed fuel/air mixture (21) into the main burner air stream (22).