TTR-1 Thermal Test
TTR-1 Thermal Test, a research reactor (graphite) in Schenectady, NY, United States, with 10 kW of thermal power, operated by Knolls Atomic Power Laboratory. 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). 4 graphite-moderated research reactors remain in operation today across 3 countries. Its declared uses include activation analysis and nuclear data measurements.
- Country
- United States
- City
- Schenectady, NY
- Type
- Graphite
- Thermal power
- 10 kW
- Operator
- Knolls Atomic Power Laboratory
- Status
- Decommissioned
- First criticality
- 1951
- Purpose
- Activation analysis, nuclear data
See also: every research reactor in United States · How research reactors work
Data: IAEA RRDB · updated on Sep 3, 2026