I. Context: A Regulatory Agency That Built Nothing
Since the 2011 Fukushima tsunami, the U.S. Nuclear Regulatory Commission has approved exactly one new project — Vogtle Units 3 and 4 in Georgia — and rejected the only Small Modular Reactor application it ever received, Oklo's Aurora design in 2022. Public anxiety after Japan, combined with the agency's institutional reflex to shed any appearance of regulatory coziness with the industry it oversees, produced a posture that often verged on adversarial. The result was a sector in which the licensing process itself had become the binding constraint, more punitive than physics, economics or public opinion. New plants rarely made it beyond the blueprint. The country that built the first commercial reactor in 1957 had quietly stopped building.
President Trump's four executive orders of May 23, 2025 begin from the opposite premise: that the binding constraint must be removed. The directives compel the NRC to evaluate new reactor license applications, including advanced SMR designs, on an eighteen-month clock. The Department of Energy is told to take an active role in cutting regulatory risk and pushing projects forward, rather than serving as an additional layer of review. The lever of policy has moved for the first time in a generation.
II. Dynamics: From Pressurized Water to Molten Sodium
Conventional reactors cool the core with water. Fuel-rod surfaces reach 350°C; water boils at 100°C; the system must therefore operate at one hundred and fifty-five times atmospheric pressure to prevent steam formation and the risk of meltdown. That pressure imposes thick steel, reinforced concrete and high-spec welds, and accounts for most of the cost of a Western reactor. Molten-sodium SMRs replace water with sodium, which boils at 883°C — well above the core's operating temperature. The system runs unpressurized. The required steel and concrete fall by up to seventy percent per megawatt, and the reactor produces far less waste per unit of power. The technology dates to the 1940s; the case for adopting it has been clear for decades and has been blocked by paperwork, not science.
The orders set hard targets: three pilot reactors built outside the national labs at first criticality by 2026; ten large reactors under construction by 2030; total U.S. nuclear capacity quadrupling to 300 gigawatts by 2050. The Department of Defense is instructed to plan reactors at domestic military installations, and the Department of Energy to study powering large AI data infrastructure with dedicated nuclear units. Westinghouse responded on July 18 with plans for ten AP1000 builds and construction starts by 2030. Ontario announced four GE-Hitachi BWRX-300 small modular reactors at its Darlington site on May 8. The policy lever has moved; industry has begun to move with it.
III. What the Executive Orders Reveal
The deeper case for SMRs is energy-return-on-investment. Hunting-and-gathering societies ran at an EROI of 4:1; agrarian systems lifted it to 5:1; coal, in seventeenth-century England, doubled it again to 10:1 and ignited the Industrial Revolution; oil and gas pushed it to 30:1, on which modern civilization was built. Wind and solar, fully accounted for the storage they require, fall below 10:1 — the energy economics of the fifteenth century. No wonder Germany is rapidly deindustrializing. Molten-sodium SMRs combine fission's intrinsic density with an unpressurized loop. Our estimates put their EROI as high as 180:1. From an energy perspective, this is among the most transformative developments in human history. The carbon-free output is a bonus.
The macroeconomic stakes are equally serious. Reinhart and Rogoff have shown that economies past 100 percent debt-to-GDP often spiral toward crisis; Niall Ferguson's 2025 law warns that a superpower whose debt service outruns its defense spending risks collapse. The United States now meets both conditions. After the Napoleonic Wars, Britain carried 173 percent debt-to-GDP by 1822; by 1857, interest payments exceeded military outlays; yet the country flourished. Historians credit industrial efficiency. The truer answer is coal, an EROI of 10:1 doubling the agrarian baseline. Britain's escape was an energy escape. If Washington can lift a 30:1 grid to 180:1, the United States possesses a comparable lever — and Africa and the Middle East, where SMRs would land into power-starved grids that no longer need a coal plant to bring online, will be among the first beneficiaries of the technology the World Bank, on June 12, ended its sixty-year ban on financing.
