Bitcoin Miners Lean on Nuclear and SMRs as AI Data-Centre Demand Rises
U.S. nuclear power is experiencing renewed interest as hyperscale AI data-centre expansion drives demand for reliable, large-scale baseload electricity. Hyperscalers such as Microsoft, Amazon and Meta are signing long-term power purchase arrangements and backing nuclear projects to secure 24/7 low-carbon power rather than relying solely on renewable energy credits. Bitcoin miners were early movers in colocating compute with baseload generation: firms like TeraWulf partnered with Talen Energy in 2021 to build Nautilus Cryptomine next to the Susquehanna nuclear plant and draw power directly. Research from the Cambridge Centre for Alternative Finance shows nuclear’s share of Bitcoin mining rose from about 4% in 2021 to nearly 9% in 2022 and is close to 10% in 2025; overall sustainable sources (nuclear, hydro, wind) now supply roughly 52.4% of mining electricity. Small modular reactors (SMRs) — smaller, faster-to-deploy plants that can be colocated with compute facilities — are gaining attention. Tech firms including Google have agreements to develop SMRs for future data centres, a model that could extend to large-scale mining. Key takeaways for traders: the mining energy mix is shifting toward stable, low-carbon baseload sources; deeper hyperscaler involvement in nuclear and SMRs may tighten baseload power supply, change power-cost dynamics for miners, and reduce ESG-related regulatory risk; greater nuclear adoption can improve mining’s sustainability narrative and may attract institutional capital over time.
Bullish
This development is broadly bullish for BTC. Greater access to stable, low-cost baseload power from nuclear and SMRs reduces miners’ operating-cost volatility and tail risk from intermittent renewables or grid constraints, improving mining profitability and margins over time. Direct power agreements and colocated generation can lower electricity costs for large miners and enable predictable hash-rate growth. Improved ESG credentials from higher nuclear and renewable shares may attract institutional capital and reduce regulatory pressure, supporting longer-term demand for BTC from investors seeking cleaner infrastructure exposure. In the short term, impacts on BTC price may be modest because these are infrastructure and demand-side shifts that materialise over months to years; however, expectations of lower mining costs and improved institutional access can be a positive narrative that supports medium- to long-term price appreciation. Risks that temper the bullish view include potential permitting delays for new nuclear/SMR builds, local opposition, and the possibility that hyperscalers consume a large share of new baseload capacity, leaving less low-cost power available to independent miners.