The new high-flux neutron source FRM-II is constructed as a reactor to replace the Munich Research Reactor FRM which has been in operation since 1957. Based on its sophisticated technical concept, the FRM-II will achieve a useable neutron flux 50 times higher at a reactor power (20 MW) five times higher than that of the FRM. A large-scale heavy-water-moderator tank is used to establish this high flux in a considerably greater usable volume and practically only by slow neutrons which are particularly well suited for utilization.

The FRM II is optimized for neutron scattering experiments at beam tubes and neutron guides. Furthermore, there are irradiation facilities, for example to produce medically used radioisotopes (as Lu-177), and a tumour treatment facility.

The reactor has been out of operation since March 2019, because of the lack of needed fuel, which may not be delivered due to changed regulations.

Framatome and the Technical University of Munich (TUM) recently started the commercial development of uranium-molybdenum fuel (UMo) for nuclear research reactors, like the FRM II