goingcritical:kursk-ii-2Russia · Power reactor
Kursk II-2
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: Kurchatov, Kursk Oblast
Second VVER-TOI unit; Kursk II replaces the RBMK units of the original Kursk plant
Kursk NPP director's stated task for 2026 is to prepare unit 2 for commissioning operations, after unit 1 (first VVER-TOI) was grid-connected in late 2025 and reached 100% power in March 2026
Details
| Design | VVER-TOI |
| Electrical output | 1,255 MWe |
Milestone history
- Announced —
- Construction start April 2019
- Fuel load —
- First criticality —
- Grid connection —
- Commercial operation —