SUPO Super High Power Reactor
SUPO Super High Power Reactor, a research reactor (homogeneous) in Los Alamos, NM, United States, with 35 kW of thermal power, operated by University of California. Decommissioned, first critical in 1951.
It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 9 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). 15 homogeneous reactors remain in operation today across 6 countries. Its declared uses include nuclear data measurements.
- Country
- United States
- City
- Los Alamos, NM
- Type
- Homogeneous
- Thermal power
- 35 kW
- Operator
- University of California
- Status
- Decommissioned
- First criticality
- 1951
- Purpose
- Nuclear data
See also: every research reactor in United States · How research reactors work
Data: IAEA RRDB · updated on Sep 3, 2026