goingcritical:angra-3Brazil · Power reactor
Angra-3
Status: Under construction Reactor status full glossary → Announced Publicly announced — a site and design are proposed, but construction has not begun. Site preparation Early site and civil works are under way; the first safety-related ("nuclear") concrete has not yet been poured. Under construction Formal construction has begun, marked by the first nuclear concrete. Fuel loaded Nuclear fuel has been loaded into the core. The reactor is fuelled but has not yet gone critical. Critical Has reached first criticality — a self-sustaining chain reaction, usually at low power — but is not yet connected to the grid. Grid connected Synchronised to the electrical grid and exporting power for the first time, but still in commissioning and power-ascension testing — not yet in commercial service. In commercial operation — the operator has formally declared the unit in regular commercial service. Shut down Permanently shut down and no longer generating; may be defuelled, undergoing decommissioning, or preserved in place. Canceled Abandoned before completion.
Site: Angra dos Reis, Rio de Janeiro State
One of the world's longest-running unfinished reactor projects, begun in 1984
Construction suspended (originally begun 1984, restarted 2010, halted again 2015 at ~65% complete and stopped once more in 2023). Government decision on completion expected by end of 2026; if approved, completion targeted for 2031-2033.
Details
| Design | Siemens/KWU pre-Konvoi PWR |
| Electrical output | 1,340 MWe |
Milestone history
- Announced —
- Construction start June 2010
- Fuel load —
- First criticality —
- Grid connection —
- Commercial operation —