When talking about nuclear in the region, the next phrase is usually a megawatt. SMR, Angra 3, a second cycle at Laguna Verde, four modules at Atucha. That debate matters. It is not the only one, and in 2026 it is not even the most concrete.
What already exists —and what can be sold, regulated, and operated tomorrow— is on another level: extending the life of a plant that is already running, manufacturing fuel, producing molybdenum-99, irradiating a sterile male, and signing a service memorandum. There is industry. The new reactor is the hypothesis.
The trade that is already being exported
Embalse, CANDU 6, returned to service in 2019 after a life extension that gave it another cycle of about 30 years. It was the first Argentine plant to complete that process and the third CANDU 6 in the world in a refurbishment of that scale, after Wolsong 1 and Point Lepreau.
That file did not stay in Córdoba. In 2026, Nucleoeléctrica Argentina signed a memorandum with SN Nuclearelectrica of Romania on CANDU 6 technology: life extension, engineering, maintenance, safety. Cernavodă 1 is moving forward with its own project, with an EPC contract of about 1.9 billion euros. The MoU is not that contract. It is the hypothesis that the operator that has already retubed Embalse has something to sell.
Mexico and Brazil are in the same logic, each in their own house. Laguna Verde 1 has a license until July 2050; unit 2, until April 2055. Angra 1 obtained long-term operation authorization in 2024 until 2044, conditioned on an LTO program that the TCU estimates at more than 3.5 billion reais; in September 2026, the unit entered a 90-day shutdown that includes refueling and safety modifications.
That is everyday nuclear: shutdown, welding, equipment qualification, new fuel. It is not a decarbonization slide.
Reactors that do not deliver kilowatts to the grid
The RA-10, in Ezeiza, is an open pool of 30 MWt. It does not go to the electrical grid. The Argentine government set a startup date in 2027 and a private capital scheme for the associated radioisotope plant. The projected capacity of molybdenum-99 —precursor of diagnostic technetium-99m— is equivalent to about 20% of current global demand. Also lutetium-177, iridium-192, doped silicon. By the end of 2026, civil progress was reported at 96%.
Brazil is building the cousin: the Brazilian Multipurpose Reactor. The infrastructure of the site started in 2025; the civil work is projected towards 2030. INVAP appears in the reference engineering, the same OPAL family as Australia. Between RA-10 and RMB, there was talk of a relevant fraction of the global isotope market. That is a prospect number, not a billing figure. The firm data is another: the region does not expect an SMR to have a working reactor.
Mexico does not have an RA-10. It has the ININ, the TRIGA from the Nuclear Center, and a line of radiopharmaceuticals —kits, Lu-177, I-131— that are already sold to users authorized by the CNSNS. Nuclear medicine does not need Sheinbaum to announce a module. It needs a cold chain, a license, and a research reactor that does not fall apart.
The field is also nuclear
The sterile insect technique is not a metaphor. Irradiated males, release, fewer offspring, less insecticide. Mexico eradicated the Mediterranean fruit fly in Colima with FAO/IAEA support and operates one of the largest breeding facilities in the world in Chiapas. In 2025–2026, the corn borer reappeared in the Central America–Mexico–United States corridor; SENASICA reports hundreds of millions of sterile flies released in the south-southeast and the IAEA opened a coordinated research project.
Whoever measures the "nuclear sector" only by installed GW misses the irradiator, the breeding facility, and SENASICA. Whoever organizes a B2B forum and only invites SMR vendors misses the same thing.
What follows, if the first module is not expected?
Three countries in the region operate nuclear electricity. The rest is not empty: there are safeguards, radiation protection, food irradiation, testing, nuclear law, fuel, maintenance. Argentina has been importing concentrate since it stopped extracting uranium in 1997 and is now discussing reactivating Sierra Pintada and other deposits; that is a cycle, not a new PWR. Brazil has INB manufacturing reloads for Angra while Angra 3 remains without a State decision. Mexico extended Laguna Verde and did not include new build in the 2025–2039 electric plan.
The commercial map, then, is not "who builds the first one." It is who qualifies a valve, who makes the reload, who operates the hot cell, who extends a license, who sells a CANDU service, who releases a sterile insect in Tapachula. A well-chosen SMR can enter that list. It does not replace it.
A forum that aims to be B2B in LATAM and only talks about modules makes the brochure mistake: it sells the object that still has no buyer and silences the one that already has an invoice. The counterpart of an operator is not always a reactor designer. Sometimes it is a radiopharmaceutical laboratory, a stop EPC, a safeguards lawyer, or a sterile insect plant.
Veracruz, in 2028, is next to Laguna Verde, not next to a prototype. That is not minor: the site already has regulation, dry spent fuel, life extension, and a chain that knows the cost of not shutting down the unit. The rest of the region has, to varying degrees, isotopes, TIE, research, and a service market that has just emerged in Bucharest.
Latin American nuclear is not "about to start." It is poorly told. It is counted by the reactor that is missing and the one that is already working is discounted —in the grid, in the hospital, and in the field. The new build will come, if it comes, on that basis. Not the other way around.
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Sources
- World Nuclear Association. Nuclear Power in Argentina. https://world-nuclear.org/information-library/country-profiles/countries-a-f/argentina
- Nuclear Engineering International. Romania, Argentina sign Candu 6 MOU (Sep 25, 2026). https://www.neimagazine.com/news/romania-argentina-sign-candu-6-mou/
- World Nuclear News. Argentina's Nucleoeléctrica signs MoU relating to life extension project in Romania. https://www.world-nuclear-news.org/articles/argentinas-nucleoelectrica-signs-mou-relating-to-life-extension-project-in-romania
- World Nuclear Association. Nuclear Power in Mexico. https://world-nuclear.org/information-library/country-profiles/countries-g-n/mexico
- Reuters / local coverage. Angra 1 shutdown, Sep 2026; TCU on LTO Angra 1. https://portal.tcu.gov.br/imprensa/noticias/extensao-da-vida-util-de-angra-1-e-analisada-pelo-tribunal-de-contas-da-uniao
- World Nuclear News. Argentina aims for 2027 launch of RA-10 multipurpose reactor (7 sep. 2026). https://www.world-nuclear-news.org/articles/argentina-aims-for-2027-launch-of-ra-10-multipurpose-reactor
- Argentina.gob.ar. RA-10, startup 2027 and radioisotopes. https://www.argentina.gob.ar/noticias/el-gobierno-nacional-confirmo-que-el-ra-10-se-pondra-en-marcha-en-2027-y-anuncio-un-modelo
- World Nuclear News. Argentina and Brazil progressing their multipurpose reactors. https://www.world-nuclear-news.org/articles/argentina-and-brazil-hail-progress-on-their-multipurpose-reactors
- ININ. National Laboratory for Research and Development of Radiopharmaceuticals. https://www.inin.gob.mx/mini_sitios/tercer_plano.cfm?codigo_opc=200002001&cve_area=PPR
- UN News / IAEA. Eradication of Mediterranean fruit fly in Colima. https://news.un.org/en/story/2022/08/1124062
- IAEA. TIE project against the corn borer (Jun. 2026). https://www.iaea.org/newscenter/pressreleases/project-launched-on-use-of-nuclear-technique-to-target-new-world-screwworm-outbreak-in-central-america-mexico-and-the-united-states
- ININ / gob.mx. Nuclear techniques and corn borer. https://www.gob.mx/inin/articulos/las-tecnicas-nucleares-para-combatir-al-gusano-barrenador