LiveNuclear power deploymentWestern cycleAnchors pending

By end of 2029, at least one small modular reactor (SMR) reaches first commercial operation at grid-scale (>50 MWe) outside China or Russia?

As of 6 Oct · 22:19 UTCResolves 31 Dec 20294 movers0 pressure moments
Timeline A · SMR Commercial Operation LandsReality
40%
Crowd 55%Gap +15

By late 2029, a small modular reactor somewhere outside China or Russia flips to full commercial operation and feeds power into the grid at scale. The NuScale reactor at Idaho National Lab's Energy Comeback Park goes live, or Ontario's Darlington BWRX-300 unit reaches criticality and starts selling electricity, or one of the UK Rolls-Royce plants or Wyoming's Natrium facility crosses the finish line first. The world sees concrete proof that a Western SMR can actually run hot, meet its power contract, and compete without infinite subsidies.

Timeline B · SMR Deployment Delayed FurtherReality
60%
Crowd 45%Gap −15

Through 2029, every Western SMR project slips past its announced finish date — sometimes by months, sometimes by years — and none reaches the grid by December 31. NuScale delays again. Darlington stays in construction. TerraPower's Natrium unit hits supply-chain snags. Rolls-Royce phases its deployment. By year-end, all projects remain in final commissioning or late-stage build, still months or quarters away from actual electricity delivery. Only China and Russia operate new grid-scale SMRs; the Western pipeline stays empty.

crowd 55
The quiet paththe one nobody’s watching

Reactor accident or SMR-supply bankruptcy in 2027–28 kills Western grid ambitions wholesale.

6%
The read
The underlying structure favors SMR Deployment Delayed Further (60%) over SMR Commercial Operation Lands (40%) — the signal is real but noisy.

Two trajectories through nuclear power deployment: SMR Commercial Operation Lands and SMR Deployment Delayed Further. The Signals below describe what would be visible if each trajectory is landing; the Levers list what could bend it. The third timeline — the one neither SMR Commercial Operation Lands nor SMR Deployment Delayed Further captures — is where the honest scope-limit sits.

Where reality is heading

A, 80% bandCrowd today
Projected reality support to 31 Dec 2028A rises from 41% to about 52% with an 80% band of 33 to 71. B falls from 53% to about 44%. Quiet path near 4 to 6%. Crowd today: A 55%.100%7550250Crowd today · A 55%A ~52%B ~44%P ~4%NowJan 2027Jan 202831 Dec 2028
Reality crosses toward A in early 2028. Today’s crowd number sits at the top of A’s band, possible but optimistic. View as table

The movers, ranked by leverage

01
US NRC regulatory capacity + Advanced Reactor Rule (10 CFR Part 53) finalizationShifts which timeline the trajectory bends toward depending on its direction.
leverage 0
Conditional
02
HALEU fuel-supply pipeline(Centrus Energy + Urenco timelines)
leverage 0
Conditional
03
Utility + hyperscaler offtake agreementsAI datacenter demand reshaping project economics
leverage 0
Conditional
04
Project cost controlAvoiding the NuScale-UAMPS cost-escalation pattern
leverage 0
Conditional

What would change our mind

Signals toward A
  • At least one SMR reaches first commercial operation at grid-scale by end 2029 outside China/Russia
  • GE Hitachi BWRX-300 (Ontario Darlington), X-energy Xe-100 (Dow Seadrift / Energy Northwest), NuScale (post-UAMPS), Rolls-Royce SMR UK, TerraPower Natrium
  • US NRC regulatory capacity + Advanced Reactor Rule finalization: movement in the direction that supports SMR Commercial Operation Lands
Signals toward B
  • SMR commercial-operation deadlines slip further
  • Licensing delays (NRC capacity), fabrication-cost overruns, supply-chain bottlenecks (HALEU fuel, pressure vessels), or ratepayer-cost pushback push the first grid-scale commercial operation into the 2030s
  • US NRC regulatory capacity + Advanced Reactor Rule finalization: movement in the direction that supports SMR Deployment Delayed Further

Evidence