Theses›Energy›Advanced nuclear SMRs

Advanced nuclear SMRs

Small modular and advanced fission reactors (50-300 MWe, factory-built, >90% capacity factor) reach first commercial datacentre deployments this decade, driven by hyperscaler firm-power PPAs (Google-Kairos, Amazon-X-energy, Microsoft-Constellation).

  • Bear
  • Closing
  • $18B by 2035

The callRestraints win this decade: hyperscalers have signed for the power, yet the reactors come after 2030 and the advanced fuel companies are already priced.

D1D2R1R2R3C1foragainst D1D2R1R2R3C1foragainst
Fig. 1The balance. Drivers and catalysts against restraints, each block sized by its weight; catalysts hang dashed because they have not happened yet, sized by their odds. It tips toward the restraints.
  1. D1AI campuses need firm power for decades, large plants take over ten years, gas is carbon and storage cannot cover a calm week, so hyperscalers signed 10 GW of nuclear.
  2. D2Fuel is the bottleneck every builder must buy through, and non-water designs cannot deploy without HALEU.
  3. R1Timing: reactor schedules sit at or past 2030, and NuScale's UAMPS project is the model for how first-of-kind plants slip.
  4. R2The fuel cohort is already priced, Standard Nuclear on a $140M Series A, and X-energy builds its own fuel through TRISO-X.
  5. R3Oklo fell from about $12B at end-2025 to $6.4-6.8B by September 2026, so the public price of the story is already falling.
  6. C1TRISO-X's TX-1 plant starts commercial HALEU TRISO fuel fabrication, enough for about 55 Xe-100 reactors, the first Western fuel at scale for advanced designs.2027
Rests onthe beliefs underneath
Supported by · confidence
What would prove itdated tests, open and resolved
20272028202920302031today123predictionswatch 20272028202920302031today123predictionswatch
Fig. 2Each ring is a dated test: dashed while open, struck through when overdue, ticked or crossed once resolved.
  1. 1The NRC issues at least one new construction permit or operating licence for an SMR or advanced (non-large-LWR) reactor between 6 Nov 2026 and 31 Jan 2027.Jan 2027 · open
  2. 2At least one SMR / advanced-fission reactor reaches commercial operation supplying a datacentre by end-2030.Dec 2030 · open
  3. 3At least one SMR or advanced reactor in commercial operation supplying a datacentre.Dec 2030 · open
  • ·The Western HALEU ramp, and GE Vernova on watch from the grid page.
Expressionslisted, private, technologies
Private · 15 private companies, 7 of them in the US.

X-energy · Kairos Power · TerraPower · Newcleo · Last Energy · Blykalla · Seaborg Technologies · Steady Energy · Radiant Industries · Standard Nuclear · Copenhagen Atomics · Moltex Energy · Ultra Safe Nuclear Corporation (USNC) · Exosens · Aalo Atomics

Technologies
Who has already bet on itprivate rounds, from public sources

$1.8B raised by 7 companies, $675M of it in the last three years. Wave under way: Large rounds in the last three years; the category is funded and getting crowded.

Backed by a top-tier venture firm: Standard Nuclear. Backed by a strategic investor: Standard Nuclear, Aalo Atomics, Kairos Power.

What changedthe record, newest first
  • 22 Jun 2026Advanced nuclear keeps clearing public-market and late-stage proof points (Oklo >$16B), driven by hyperscaler power-purchase demand rather than climate policy.
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