The nuclear fleet and the fuel chain behind it
Operating
419
404.8 GW gross
Under construction
85
90.9 GW gross
Pre-construction
136
plus 327 announced
Retired
235
535 cancelled
Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release · 1823 units tracked across 62 countries · fusion devices excluded from these totals
The fleet
Every unit ever built, building, or cancelled — 1823 of them, with specification, ownership and milestone dates.
The chain
Where the fuel comes from. Seven stages from mine to fabricated assembly, and the handful of companies controlling each one.
The pipeline
Which SMR and advanced designs are actually moving through regulators, and which exist only in press releases.
Largest operating fleets
| Country | Units | GW gross |
|---|---|---|
| United States | 94 | 102.5 |
| China | 61 | 64.6 |
| France | 57 | 65.7 |
| Russia | 34 | 29.8 |
| South Korea | 26 | 27.1 |
| India | 22 | 8.4 |
| Canada | 17 | 13.5 |
| Ukraine | 15 | 13.8 |