L-77 UCSB
L-77 UCSB, a research reactor (homogeneous) in Santa Barbara, CA, United States, with 10 W of thermal power, operated by UCSB Dept. of Chemistry & Nuclear Engineering. Decommissioned, first critical in 1975.
It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 33 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 teaching and activation analysis.
- Country
- United States
- City
- Santa Barbara, CA
- Type
- Homogeneous
- Thermal power
- 10 W
- Operator
- UCSB Dept. of Chemistry & Nuclear Engineering
- Status
- Decommissioned
- First criticality
- 1975
- Purpose
- Teaching, activation analysis
See also: every research reactor in United States · How research reactors work
Data: IAEA RRDB · updated on Sep 3, 2026