a cooling system for a turbine includes a blower configured to generate a cooling gas flow to be passed through a rotor cavity of the turbine ; piping configured to deliver the cooling gas flow to the turbine ; and at least one valve configured to control the cooling gas flow . the piping is operatively connected to the rotor of the turbine . a method of cooling a turbine includes generating a cooling gas flow with a blower to be passed through a rotor cavity of the turbine ; and delivering the cooling gas flow to the turbine .