Why Nuclear
Nuclear power has the highest capacity factor of any electricity source — running near 93% of all hours in the year, far above wind, solar, gas, or coal. That means a nuclear plant is producing maximum power almost continuously, day and night, in any weather. It is the densest source of firm, carbon-free electricity on the grid: zero operational greenhouse-gas emissions and zero air pollution.
The energy density is staggering. A single large reactor delivers around a gigawatt of round-the-clock output — enough to power hundreds of thousands of homes 24/7 from a footprint smaller than a wind or solar farm a fraction of its capacity. Because it is always on, nuclear is the essential complement to variable renewables: when the sun sets and the wind drops, reactors keep the grid stable.
Firm and carbon-free at once. Most carbon-free sources are intermittent, and most firm sources emit carbon. Nuclear is the rare source that is both — making it indispensable to any serious plan for a reliable, decarbonized American grid.
The American Fleet + Advanced Reactors
The existing US reactor fleet quietly generates roughly 18–19% of all US electricity and about half of the nation's carbon-free power — more than wind and solar combined. License extensions are keeping these proven plants running for 60, 70, and even 80 years, preserving an enormous base of clean generation. New construction has restarted as well, with units like Plant Vogtle in Georgia bringing fresh large-scale capacity online.
- Existing fleet: license renewals and uprates extend the life and output of plants already paid for and proven
- New large builds: Vogtle Units 3 & 4 demonstrate America can still build gigawatt-scale reactors
- Small modular reactors (SMRs): factory-built, scalable units that ship to site — faster to deploy, lower up-front cost, and right-sized for grids and industry
- Microreactors: truck-transportable units sited near load for remote communities, military bases, and isolated industrial sites
The SMR revolution changes the economics of nuclear: instead of a decade-long megaproject, reactors become repeatable, factory-built products that can be sited near where power is consumed — including directly powering the explosive growth of AI data centers that need clean, firm electricity around the clock.
The Fuel Cycle & Domestic Security
Nuclear fuel moves through a defined cycle: uranium mining, conversion, enrichment, and fabrication into fuel assemblies. Today's fleet runs on low-enriched uranium, but many advanced reactors and SMRs require HALEU (high-assay low-enriched uranium) — a fuel the US currently produces in only limited quantities.
This is a strategic vulnerability. A large share of global enrichment capacity sits with adversary nations, so rebuilding domestic and allied fuel-cycle capacity — mining, conversion, and especially enrichment — is essential to genuine energy independence. Reactor vessels and primary systems also depend on heavy forgings, pressure-grade steel, and specialty alloys, tying nuclear directly to a secure domestic metals supply chain (see Steel & Alloys).
Nuclear + Storage + Grid
No single source builds a resilient grid alone. Baseload nuclear provides the firm, always-on foundation; battery storage absorbs surges and smooths demand; and renewables add low-cost, low-carbon energy when conditions are favorable. Together they form a resilient, decarbonized mix that no one technology can deliver by itself. Nuclear sits at the heart of this integrated energy value chain.
Powering the AI era. Hyperscale AI and data-center load runs 24/7 and cannot tolerate interruption. Nuclear — and especially SMRs sited next to the load — is uniquely suited to deliver gigawatts of clean, firm power exactly where the compute is being built.
Defense heritage & traceability. America has safely operated nuclear reactors at sea for seventy years through the US Navy, the deepest reactor-operations expertise in the world and a direct bridge to advanced microreactor deployment for defense. Pairing that heritage with Digital DNA-style supply-chain traceability gives every critical nuclear component a verifiable, tamper-proof provenance record — from raw alloy to installed part.