X-10 Pile, Oak Ridge Graphite
X-10 Pile, Oak Ridge Graphite, a research reactor (graphite) in Oak Ridge, TN, United States, with 3.8 MW of thermal power, operated by Union Carbide Corporation. Decommissioned, first critical in 1943.
It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 1 year after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). 4 graphite-moderated research reactors remain in operation today across 3 countries. Its declared uses include isotope production and nuclear data measurements.
- Country
- United States
- City
- Oak Ridge, TN
- Type
- Graphite
- Thermal power
- 3.8 MW
- Operator
- Union Carbide Corporation
- Status
- Decommissioned
- First criticality
- 1943
- Purpose
- Isotope production, nuclear data
See also: every research reactor in United States · How research reactors work
Data: IAEA RRDB · updated on Sep 3, 2026