HFIR
HFIR, a research reactor (tank) in Oak Ridge, TN, United States, with 85 MW of thermal power, operated by Ornl- Research Reactors Division. Operating, first critical in 1965.
It is one of the 48 research reactors operating in the United States. It went critical 23 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). It is one of 36 tank-type reactors operating worldwide, spread across 23 countries. Its declared uses include isotope production, neutron scattering, neutron radiography and teaching.
- Country
- United States
- City
- Oak Ridge, TN
- Type
- Tank
- Thermal power
- 85 MW
- Operator
- Ornl- Research Reactors Division
- Status
- Operating
- First criticality
- 1965
- Purpose
- Isotope production, neutron scattering, neutron radiography, teaching, training, activation analysis, innovative research, materials testing
See also: every research reactor in United States · How research reactors work
Data: IAEA RRDB · updated on Sep 3, 2026