MER
MER, a research reactor (critical assembly) in St. Petersburg, Russia, with 200 W of thermal power, operated by Krylov Shipbuilding Research Institute. Shut down, first critical in 1970.
It was one of the 123 research reactors Russia has had; 57 remain in operation today. It went critical 24 years after the first research reactor in Russia, F-1 (1946). 44 critical assemblies remain in operation today across 12 countries.
- Country
- Russia
- City
- St. Petersburg
- Type
- Critical assembly
- Thermal power
- 200 W
- Operator
- Krylov Shipbuilding Research Institute
- Status
- Shut down
- First criticality
- 1970
See also: every research reactor in Russia · How research reactors work
Data: IAEA RRDB · updated on Sep 3, 2026