The research neutron source Heinz Maier-Leibnitz (FRM II) is one of the most powerful and advanced neutron sources in the world. Using the nuclear fission of uranium, it produces more than 1014 free neutrons per square centimetre and second, which are used for research, industry and medicine. The thermal capacity amounts to 20 MW.
For physical reasons (see fuel element) the FRM II is in operation at nominal power for 60 days. Each operating phase is followed by a maintenance break, so that each year users can typically benefit from up to 240 days for measurements.
As a nuclear installation, FRM II meets the highest safety criteria laid down by the authority responsible (the Ministry for the Environment and Consumer Protection) with the involvement of experts and is repeatedly inspected in accordance with § 20 of the Atomic Energy Act.