Russian Federation, Dimitrovgrad: SM-3. Profile 23

The SM reactor was brought to power for the first time on 15 October 1961, and on 3 November 1962, a neutron flux as high as 2 × 10¹⁵ n·cm^-2·s^-1 in the central channel was achieved for the first time in the world when the reactor reached a thermal power of 46 MW. Step by step, as a result of the upgrades and advances of the reactor core, its central part, all circuits and systems, the power was increased to 100 MW, and the neutron flux in the central channel reached 5 × 10¹⁵ n·cm^-2·s^-1. Throughout the whole lifetime of the reactor, the core, its central part, all circuits and systems have been continuously upgraded and advanced, and these activities are continuing. The SM reactor is a vessel-type high-flux reactor with a trap with intermediate neutron spectrum and cooled by pressurized water. Before its upgrading in 1992, the reactor was known as SM-2, and after its reconstruction it was renamed to SM-3. Reactor SM-3 is a vessel-type high-flux pressurized water-cooled reactor with a hard neutron flux spectrum in the core. A central flux trap has an intermediate neutron spectrum with a high thermal neutron flux and space for 27 irradiation targets with Ø 12 mm.