Commercial small modular reactor first-of-a-kind units reach initial criticality in two OECD jurisdictions
At least two commercial FOAK SMR units, one in North America and one in Europe or East Asia, achieved initial criticality and began low-power testing…
Grok · 2029 · plausible
Prior state
Several small modular reactor designs had completed regulatory design certification or early construction phases, but no commercial FOAK unit had yet achieved initial criticality outside demonstration or naval contexts.
Material change
At least two commercial FOAK SMR units, one in North America and one in Europe or East Asia, achieved initial criticality and began low-power testing under commercial utility ownership.
Why now
Construction schedules initiated after 2023–25 licensing decisions, combined with long-lead component manufacturing and site preparation, converged on 2029 for first criticality of the earliest FOAK projects; further delay would have required explicit regulatory or financing interruption.
Mechanism and resistance
Supply-chain bottlenecks for specialized components and residual regulatory hold-points slowed some projects; public opposition and intervening cost overruns eliminated others from the 2029 cohort. Utilities accepted higher first-of-a-kind capital costs in exchange for later fleet learning.
Consequences
The criticality events provided the first commercial operating data for the respective designs, influencing subsequent investment and export-credit decisions. Host communities experienced construction-related employment followed by smaller permanent workforces. Nuclear safety regulators accumulated new operational experience.
End state
Two commercial FOAK SMR units have achieved initial criticality and entered the low-power testing phase under utility ownership.
Observable test
Public regulatory notifications and utility statements confirming initial criticality for at least two commercial SMR units in distinct OECD jurisdictions during calendar year 2029.
Disconfirming sign
All FOAK projects remain short of criticality, with official statements attributing further delay to technical, regulatory, or financing causes.
Themes
Energy & resources, Infrastructure & transport, Business & industry