MARIA
MARIA, a research reactor (pool) in Otwock, Poland, with 30 MW of thermal power, operated by Institute of Atomic Energy. Operating, first critical in 1974.
It is the only research reactor operating in Poland today; the country has shut down 5 others. It went critical 16 years after the first research reactor in Poland, EWA (1958). It is one of 48 pool-type reactors operating worldwide, spread across 28 countries. Its declared uses include isotope production, neutron scattering, neutron radiography and transmutation.
- Country
- Poland
- City
- Otwock
- Type
- Pool
- Thermal power
- 30 MW
- Operator
- Institute of Atomic Energy
- Status
- Operating
- First criticality
- 1974
- Purpose
- Isotope production, neutron scattering, neutron radiography, transmutation, gemstone irradiation, teaching, training, activation analysis
See also: every research reactor in Poland · How research reactors work
Data: IAEA RRDB · updated on Sep 3, 2026