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| Period | ARENH supply (TWh) | ARENH to alternative suppliers (TWh) | ARENH for network losses (TWh) | Regulated tariff volumes (TWh) | ARENH price (EUR/MWh) | ARENH cropping price (EUR/MWh) |
|---|---|---|---|---|---|---|
| 2024 | 122.9 | 100 | 22.9 | 102.1 | 42 | 102 |
| 2025 | 122.7 | 99.4 | 42 | 74 |
| Period | Milestone | Status | Printed figure / note |
|---|---|---|---|
| Sep 2024 | First criticality | Complete (3 Sep 2024) | First self-sustaining chain reaction, as printed in the 21 Dec 2024 grid-connection release. |
| Dec 2024 | First grid connection | Complete (21 Dec 2024, 11:48) | First electrons on the national grid. The same release estimated about 14 TWh from first coupling until VC1. |
| Jan 2025 | ASNR approval to exceed 25% power | Complete (31 Jan 2025) | Printed in URD 2025. |
| Jun 2025 | 60% power tests then primary-circuit valve outage | Complete | Early June tests at 60%. Reactor shut 19 June 2025 for work on primary-circuit valves. |
| Oct 2025 | Reconnection at 60% | Complete (15 Oct 2025) | Startup-test programme resumed at 60% power. |
| Dec 2025 | 100% nuclear thermal power | Complete (14 Dec 2025, 11:37) | ASNR approved going beyond 80% on 12 Dec 2025. 1,669 MW gross electrical power. Authorized capacity in the URD palier table is 1,620 MW pending startup-test finalization. |
| 2025 FY | Output during power-up | Printed | 2.2 TWh, included in France nuclear 373.0 TWh. |
| Sep 2026 (planned) | First complete inspection (VC1) | Planned (26 Sep 2026) | URD and 25 February 2026 results webcast: 350 days. Not an actual 2026 generation year. |
| Period | Reactors in operation | Authorized capacity (MW) | Mean age (years) | Ten-year inspection status at 31 Dec 2025 |
|---|---|---|---|---|
| 900 MW palier | 32 | 29,010 | 43 | 25 of 32 have completed the 4th ten-year inspection (VD4). Cruas 3, Saint-Laurent 1, Blayais 4 and Cruas 1 completed VD4 in 2025. |
| 1,300 MW palier (P4 8 reactors + P'4 12 reactors) | 20 | 26,370 | 37 | 19 of 20 have completed the 3rd ten-year inspection (VD3), including Penly 2 in 2025. Golfech 2 VD3 was in progress at year-end. 4th ten-year inspections for this palier start in 2026. |
| N4 1,450 MW palier (Chooz B and Civaux) | 4 | 5,990 | 25 | All 4 have completed the 2nd ten-year inspection (VD2). |
| EPR Flamanville 3 | 1 | 1,620 | Counted in the 57-reactor / 62,990 MW snapshot. Mean age printed as n.a. Coupled 21 Dec 2024. 100% nuclear thermal power 14 Dec 2025. URD commissioning during 2026. First complete inspection (VC1) planned 26 Sep 2026 for 350 days. | |
| Printed fleet total at 31 Dec 2025 | 57 | 62,990 | 40 | 19 sites. Mean age 40 years excludes Flamanville 3. Fessenheim 1 and 2 permanently shut in 2020 and are not in this total. |
| EPR2 programme (not in operation) | 6 under development (studies for 8 more) | Board presented a forecast cost of 72.8 billion EUR in 2020 euros on 18 Dec 2025 (Penly, Gravelines, Bugey). EU State aid in-depth investigation opened 31 Mar 2026. No construction start year or COD year is printed in the 2025 URD. |