For the second consecutive year, nuclear generation in Argentina reached its all-time high
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Nuclear energy once again marked a milestone in Argentina during 2025 by reaching a new historic record for annual electricity generation, surpassing its own previous mark for the second consecutive year. The sector's performance was explained mainly by the strong contribution of the Embalse and Atucha II plants, which reached their highest production levels since they went into operation.
According to official data, the total net nuclear energy generation rose to 10,760,572 MWh, surpassing the 2024 figure, which had been 10,449,015 MWh. With this result, nuclear energy covered 7.5% of national electricity demand over the past year, consolidating itself as one of the most stable and reliable sources in the Argentine energy system.
Por segundo año consecutivo, la generación nuclear en Argentina alcanzó su máximo histórico.
The aggregate record was accompanied by individual historic marks. Embalse Nuclear Power Plant reached in 2025 a net generation of 5,352,203 MWh, surpassing its previous maximum of 5,224,058 MWh, recorded in 2023. Meanwhile, Atucha II Nuclear Power Plant produced 5,408,370 net MWh, leaving behind its previous record of 5,200,490 MWh, reached in 2016. The operating company highlighted that these results reflect the high level of operational reliability of the plants and the efficiency of maintenance and technical management plans.
The country's three active nuclear power plants are managed by Nucleoeléctrica Argentina, a majority state-owned company that in recent years has managed to sustain and even improve the availability levels of the nuclear fleet. In a context of growing energy demand and structural constraints in the electricity system, nuclear once again demonstrated its ability to provide firm capacity, without depending on weather factors and with low carbon emissions.
In parallel with the generation records, the sector is moving forward with strategic projects that aim to guarantee the long-term operational continuity of the plants. At Atucha I, the Life Extension Project continues, which has already reached 48% progress one year after its start. The project includes the modernization of key systems and will allow the plant to continue supplying energy to the electricity system for at least 20 more years.
Por segundo año consecutivo, la generación nuclear en Argentina alcanzó su máximo histórico.
At Atucha II, meanwhile, the Dry Storage Project for Spent Fuel Elements (ASECG II) continues to be implemented, with 38% progress. This infrastructure is central to ensuring the plant's operational future and to guaranteeing that the management of spent fuel complies with the most demanding international standards in nuclear safety.
The 2025 results confirm that nuclear energy occupies a strategic role within the Argentine energy matrix. While other sources face supply variations or structural limitations, nuclear continues to provide predictability, stability, and scale.
