The United States is building nuclear reactors again — dozens of advanced designs racing from paper to criticality. These are the trackers and tools that follow that buildout: who's ahead, what they're building, what it costs, and how the machines actually work.
Advanced reactors racing to first criticality and continuous operation under the federal reactor pilot program — milestone by milestone.
Open thesecondatomicage.com/criticality →The commercialization pipeline — which advanced-reactor designs are moving from demo to deployment, and where each company stands.
Open thesecondatomicage.com/commercialization →Levelized cost of electricity compared across reactor designs, with tunable capital, fuel, and operating inputs.
Open thesecondatomicage.com/lcoe →The design dimensions, the common archetypes, and which current reactors fit each — the companion to the Reactor Anatomy series.
Open thesecondatomicage.com/anatomy →A shifting venn of the advanced-reactor field — regroup every design by size, fuel, moderator, coolant, target industry, and more, and see where they overlap.
Open thesecondatomicage.com/design-space →Every advanced-reactor design on one clock — from design approval through licensing and construction to first criticality and commercial operation.
Open thesecondatomicage.com/timeline →Where it's actually being built — every sited design and firm order on a US map, from the Idaho test complex to the hyperscaler campuses.
Open thesecondatomicage.com/buildout →The demand side — who has agreed to buy how many megawatts, and how much of the ~26 GW headline order book is actually firm versus merely announced.
Open thesecondatomicage.com/order-book →The whole supply chain around the reactor — the nine stages from mine to repository, and who is racing to rebuild each one, from the HALEU crunch to the waste question.
Open thesecondatomicage.com/fuel-cycle →