CountryNuclear power in Argentina
Argentina has 2 reactors operating with 1,296 MW net installed capacity, 7 % of its electricity. One more unit has its operation suspended. 1 under construction. First reactor connected in 1974.
Argentina ranks 27th among the 32 countries with operating reactors by net capacity, and 20th by number of reactors. Its first reactor, Atucha 1, started operating in 1974, 52 years ago. All 2 operating units are PHWR. The highest-capacity plant in operation is Atucha, with 688 MW net, and the oldest unit still in service is Embalse, operating since 1984. One unit is under construction, CAREM at Atucha.
PHWR reactors in Argentina · PWR reactors in Argentina · Rankings
Electricity generation mix
Share of electricity generation, 2025 (closest earlier year; 2026 has no data) · Ember
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- Hydraulic generation fell 255 MW in 5 min (6,333 → 6,078 MW)
- Hydraulic generation fell 278 MW in 5 min (6,746 → 6,468 MW)
- Hydraulic generation rose 296 MW in 5 min (6,269 → 6,564 MW)
- SADI demand 3.5% above forecast (15,279 MW vs 14,756 MW)
- Hydraulic generation rose 309 MW in 5 minutes (5,547 → 5,856 MW)
- SADI demand 3.0% below forecast (13,289 MW vs 13,696 MW)
- SADI demand 2.1% above forecast (14,873 MW vs 14,569 MW)
- Hydropower generation fell 266 MW in 5 min (6,343 → 6,077 MW)
Plants
| Plant | Units | Types | Status today | MWe operating |
|---|---|---|---|---|
| Atucha | 4 | PHWR, PWR | operatingoffline for life extensionunder constructionplanned | 1,023 |
| Embalse | 1 | PHWR | operating | 608 |
Data: IAEA PRIS · Wikipedia · editorial review · updated on Sep 21, 2026