DUESSELDORF, April 11 (Reuters) - Thyssenkrupp on Thursday fleshed out details of a restructuring programme for its challenged steel division, saying production capacity at its Duisburg site will be significantly reduced, with measures involving job cuts that cannot yet be quantified.

The steel division's executive board said production capacities would be reduced to approximately 9 million to 9.5 million tons per year, which roughly corresponds to the shipping level of the past three years. Today production capacity at the site is designed for around 11.5 million tons. (Reporting by Emma-Victoria Farr and Tom Kaeckenhoff, Editing by Chris Reese)