Saltfoss
Updated: February 16, 2026
The team
Country: Denmark | Funding: $28.4M (+)
Founded: 2015
Website: https://saltfoss.com/
Saltfoss is developing a compact modular reactor based on molten fluoride salt (CMSR), installed on a floating power plant. This power plant can produce up to 800 MW whenever and wherever needed, supporting variable renewable energy generation on windless, cloudy days. In the CMSR, fuel is mixed with molten fluoride salt, which also serves as a coolant. This provides significant safety advantages. Unlike conventional nuclear reactors, the Saltfoss reactor operates at near-atmospheric pressure, eliminating a wide range of accident scenarios. At the end of the 24-year fuel cycle, the fuel is returned to the supplier, where the short-lived fission products are separated and stored.
Founded: 2015
Website: https://saltfoss.com/
Saltfoss is developing a compact modular reactor based on molten fluoride salt (CMSR), installed on a floating power plant. This power plant can produce up to 800 MW whenever and wherever needed, supporting variable renewable energy generation on windless, cloudy days. In the CMSR, fuel is mixed with molten fluoride salt, which also serves as a coolant. This provides significant safety advantages. Unlike conventional nuclear reactors, the Saltfoss reactor operates at near-atmospheric pressure, eliminating a wide range of accident scenarios. At the end of the 24-year fuel cycle, the fuel is returned to the supplier, where the short-lived fission products are separated and stored.
