Current state

Status	Under construction
Design	VVER-1200 (PWR)
Net capacity	1,110 MWe
Country	Russia
Vendor	Rosatom
Owner / operator	Rosenergoatom
Construction start	2025-03
Original COD target	—
Current COD estimate	2030
Schedule slippage	—

Notes

Construction start Mar 2025 per Rosatom via NucNet (operator-origin; recorded as medium). General contractor Titan-2. Rosenergoatom chief Jul 2026: 55 workfronts, on/ahead of schedule; replacement units commissioning 2030 (unit 3) and 2032 (unit 4) — tracker CODs 2029/2030 retained pending WNA revision.

Milestone log

2026-06-16 — Listed as under construction in the WNA world table, grid connection estimated 2030 (source)
2026-06-19 — Concrete pouring began for reactor shaft (source)
2026-08-05 — 157-t core-catcher body installed three months ahead of schedule (Titan-2); first large equipment installation at unit 4 (source)
2026-08-12 — First 97-t tier of the inner containment shell installed ahead of schedule; RPV installation scheduled H2 2029 (source)

The milestone log is append-only: corrections are recorded as new entries, never rewrites. Full history via /api/v1/changes.

NNN coverage

On the VVER-1200 design

Bangladesh’s Rooppur 1 reaches first criticality 2026-10-13
Akkuyu 1 completes primary-circuit hydraulic tests 2026-10-10
The 6 nuclear stories that mattered this week 2026-09-19
Vietnam picks Rosatom for Ninh Thuan 1, Korea closes on Ninh Thuan 2 2026-09-13
The 8 nuclear stories that mattered this week 2026-09-05
Rosatom signs EPC contract for Kazakhstan's first nuclear plant 2026-09-04

Leningrad II-4

Current state

Notes

Milestone log

NNN coverage

On the VVER-1200 design

Sources