PCA Plasma Core Assembly
PCA Plasma Core Assembly, a research reactor (critical assembly) in Los Alamos, NM, United States, with 100 W of thermal power, operated by University of California. Decommissioned, first critical in 1974.
It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 32 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). 44 critical assemblies remain in operation today across 12 countries. Its declared uses include nuclear data measurements and materials testing.
- Country
- United States
- City
- Los Alamos, NM
- Type
- Critical assembly
- Thermal power
- 100 W
- Operator
- University of California
- Status
- Decommissioned
- First criticality
- 1974
- Purpose
- Nuclear data, materials testing
See also: every research reactor in United States · How research reactors work
Data: IAEA RRDB · updated on Sep 3, 2026