https://thorconpower.com Plants are built complete in a shipyard, towed to a site in Indonesia, ballasted to the seabed, and then connected to the grid.
Costs are estimated at $1.2B for a 1GWe site. Largely verified by DSME and Doosan.
A large shipyard can produce 20 Gwe/year.
Build time is 1 year. Time from permits and land to grid power is 2 years.
Electricity costs are $0.03 USD/kWhr.
Can compete directly with coal in the developing world.
Recent change is the addition of the vault – dry cask storage for 80 years operation by adding 5m to the 180m long hull.