Current state

Status	Under construction
Design	VVER-1200 (PWR)
Net capacity	1,110 MWe
Country	Hungary
Vendor	Rosatom
Owner / operator	MVM Paks II
Construction start	2026-02-05
Original COD target	—
Current COD estimate	2032
Schedule slippage	—

Notes

First concrete 2026-02-05 (WNA country profile and Rosatom newsletter concur). Foundation-slab ring-bay pours Jul 31 (776 m3) and Sep 11 (~2,000 m3) per Paks2 operator news (single origin) — noted, not asserted. CEO change Jul 2026 (Sagodi); unit-6 pit past halfway Jun 2026 (context). Units officially numbered 5 and 6 at site; tracker uses Paks II-1/2 naming. COD 2032 per WNA table.

Milestone log

2026-06-16 — Listed as under construction in the WNA world table, grid connection estimated 2032 (source)
2025-11-04 — Hungary's HAEA issued the partial construction licence; Paks II said first concrete was expected in February 2026 — the first EU nuclear first-concrete since Hinkley Point C-2 in December 2019 (source)
2026-02-05 — First concrete poured for the foundation slab of Paks II unit 1, formally starting construction (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

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
The 6 nuclear stories that mattered this week 2026-08-29

Current state

Notes

Milestone log

NNN coverage

On the VVER-1200 design

Sources