Manhattan Institute: "Over the past decade, there has been an enormous upswing in public and private investment in developing new, smaller types of nuclear reactors. Whether prematurely or not, private investors and public policymakers have concluded that the traditional model of building large (approximately 1,000-MW) reactors is no longer financially viable. A number of startups—along with established companies, including GE-Hitachi (GEH) and Holtec—are designing small reactors that would be built in factories and delivered to power stations mostly complete. These include Small Modular Reactors (SMRs) that are basically scaled-down versions of today’s large light-water reactors, as well as advanced reactors that typically use exotic methods such as molten salt or high-temperature gas, instead of water, for cooling. These small reactors range in output from megawatts in the single digits to 300 MW. Multiple small reactors can be grouped together on a single site to reach the power output of a large plant."