Construction sites. Installation of an overhead crane has begun at the construction site of the BREST-OD-300 fast reactor in Seversk, Russia. The crane will be used to move large-sized equipment during the construction and maintenance of the reactor. The installation process is expected to take about six months. BREST-OD-300 is a lead-cooled fast-neutron reactor being built as part of the Proryv (Russian for ‘breakthrough’) project, aiming to make the closed nuclear fuel cycle a commercially feasible alternative. In addition to the innovative reactor, the experimental power production facility (abbreviated ODEK in Russian) will comprise modules for the fabrication/refabrication of mixed uranium-plutonium nitride (MUPN) fuel and reprocessing of irradiated nuclear fuel.