N4 1450 MWe series
The N4 1450 MWe series is a Generation II pressurised water reactor from Framatome. 4 units are operating and 0 are under construction, out of 4 on record.
The last French series before the EPR, and the first designed by Framatome without a Westinghouse licence. Four units at Chooz B and Civaux, with new steam generators, a fully computerised control room and the highest output of any French reactor. Civaux 1 cracked a residual heat removal line in 1998, five months after start-up, and the whole series was modified before the design settled.
| Vendor | Framatome |
|---|---|
| Reactor type | Pressurised water reactor (PWR) |
| Generation | II |
| Capacity range | 1450–1560 MWe gross |
| Also recorded as | N4 REP 1450in the source tracker |
| Coolant | Light water |
| Typical enrichment | 3–5% U-235 |
| France | 4 units, 4 operating |
|---|
How long it took to build
Years from construction start to grid connection, for units with both dates on record. The median across 4 finished units is 10.2 years.
| Unit | Country | Started | Connected | Years |
|---|---|---|---|---|
| Chooz nuclear power plant B-1 | France | 1984 | 1996 | 12.7 |
| Chooz nuclear power plant B-2 | France | 1985 | 1997 | 11.3 |
| Civaux nuclear power plant 1 | France | 1988 | 1997 | 9.2 |
| Civaux nuclear power plant 2 | France | 1991 | 1999 | 8.7 |
All N4 1450 MWe series units
| Unit | Country | Status | Gross MW | Online |
|---|---|---|---|---|
| Chooz nuclear power plant B-1 | France | 1,560 | 2000 | |
| Chooz nuclear power plant B-2 | France | 1,560 | 2000 | |
| Civaux nuclear power plant 1 | France | 1,561 | 2002 | |
| Civaux nuclear power plant 2 | France | 1,561 | 2002 |
Sources
- N4 1450 MWe series, vendor documentation
- Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release , CC BY 4.0 · retrieved 2026-09-06
How these sources are used, including the corrections applied on top of them and what is deliberately left blank · download the underlying data