Background: Small modular reactors, explained: who is building them worldwide
Current state
| Status | Under construction |
| Design | RITM-200S (PWR, SMR) |
| Net capacity | 50 MWe |
| Country | Russia |
| Vendor | Rosatom (OKBM) |
| Owner / operator | Rosatom |
| Construction start | — |
| Original COD target | — |
| Current COD estimate | 2028 |
| Schedule slippage | — |
Notes
Covered by NNN newsroom 2026-09-25 (second-reactor-manufactured-for-floating-nuclear-plant) citing Rosatom + WNN. Reactor pair completes the first PEB-106; hull integration and commissioning dates still ahead.
Milestone log
- 2026-06-16 — Listed as under construction in the WNA world table, grid connection estimated 2028 (source)
- 2026-09-24 — Second RITM-200S reactor unit manufactured at ZiO-Podolsk; passed hydraulic tests and control-assembly checks (first unit at shipyard awaiting installation) (source)
The milestone log is append-only: corrections are recorded as new entries, never rewrites. Full history via /api/v1/changes.