S8G Submarine Prototype
S8G Submarine Prototype, a research reactor (other) in Ballston Spa, NY, United States, operated by Bechtel Marine Propulsion Co.. Operating, first critical in 1979.
It is one of the 48 research reactors operating in the United States, one of 5 zero-power assemblies among them. It went critical 37 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). It has been 47 years since its first criticality.
- Country
- United States
- City
- Ballston Spa, NY
- Type
- Other
- Thermal power
- critical
- Operator
- Bechtel Marine Propulsion Co.
- Status
- Operating
- First criticality
- 1979
See also: every research reactor in United States · How research reactors work
Data: IAEA RRDB · updated on Sep 3, 2026