The Definitive Guide toAI Data Centers
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SMR · Small Modular Reactor

Factory-built nuclear reactor under ~300 MW, proposed as clean firm power for large AI campuses.

Compact, factory-fabricated nuclear unit pitched as scalable clean-firm power for data centers.

Also written as: Small Modular Reactor

Current numbers

~45 GWdata-center SMR offtake pipeline (up from ~25 GW end-2024); first corporate SMR-fleet deal Google-Kairos Oct 2024 (500 MW); first utility Gen-IV PPA Kairos-TVA Aug 2025 (50 MW, Google offtake)as of 2026 · register ↗
>10 GWnuclear contracted by hyperscalers: TMI/Crane 835 MW (~2027), Amazon-Talen ~2 GW, Kairos SMR ~500 MW (~2030-35)as of 2025-2026 · register ↗
~$6,000–13,000/kW (OCC)SMR first-of-a-kind capex; restarts ~2027–28, SMR scale 2032–2035; ~10% of DC demand growth by 2035as of 2024-09 · register ↗

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