L-47 Atomics International
L-47 Atomics International, a research reactor (homogeneous) in Los Angeles, United States, with 5 W of thermal power, operated by North American Aviation. Decommissioned, first critical in 1957.
It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 15 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 materials testing.
- Country
- United States
- City
- Los Angeles
- Type
- Homogeneous
- Thermal power
- 5 W
- Operator
- North American Aviation
- Status
- Decommissioned
- First criticality
- 1957
- Purpose
- Materials testing
See also: every research reactor in United States · How research reactors work
Data: IAEA RRDB · updated on Sep 3, 2026