Device for local heat input to a turbine shaft

The invention relates to a method for shortening the start-up of a turbine (1) comprising a turbine housing (2) and within the turbine housing (2) provided for the turbine components (3, 4, 5) which flows through during operation with a turbine housing (2) working medium come into contact, and a turbine shaft (3) comprise passes through the turbine housing (2) axially, comprising wherein the steam turbine (1) during stoppage of the turbine (1) heat energy is supplied, wherein at least one inside the turbine housing (2) provided turbine component (4) during standstill of the steam turbine is heated by radiant heat by a heater.