UHTREX Ultra-High Temperature Experiment
UHTREX Ultra-High Temperature Experiment, a research reactor (other) in Los Alamos, NM, United States, with 3 MW of thermal power, operated by University of California. Decommissioned, first critical in 1969.
It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 27 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). Its declared uses include innovative research.
- Country
- United States
- City
- Los Alamos, NM
- Type
- Other
- Thermal power
- 3 MW
- Operator
- University of California
- Status
- Decommissioned
- First criticality
- 1969
- Purpose
- Innovative research
See also: every research reactor in United States · How research reactors work
Data: IAEA RRDB · updated on Sep 3, 2026