Transatomic Energy started in 2011, realized there were mistakes in their original analyses in 2016 and has shutdown in 2018. They have made their work and molten salt reactor designs open source.
As of January 2018, the advanced nuclear industry has climbed up to over 75 projects in North America.
At least five companies are already working with the Nuclear Regulatory Commission to prepare for licensing, and major new milestones have been reached with regulators in both the U.S. and Canada. The first advanced reactors sending power to the grid should be as soon as 2026.
NuScale modular reactors and Terrestrial Energy Molten Salt reactors are currently in the lead to commercial reactors.