🛠️ Invention or technique

First nuclear reactor in Latin America (IEA-R1)

Primer reactor nuclear de Latinoamérica (IEA-R1)

Date
16 de septiembre de 1957 · confidence high
Place
Atomic Energy Institute, São Paulo, Brazil
Credited to
Atomic Energy Institute (Brazil), with support from the Atoms for Peace programme
Field
Matter & energy

What it is

A pool-type research reactor that reached criticality in September 1957 at the University of São Paulo. It was the first in Latin America and the southern hemisphere and was used to produce radioisotopes and train staff.

The Argentine RA-1, the first reactor in the region designed and built by local technicians, reached criticality on 17 January 1958 in Buenos Aires.

What it led to

  • Medical and industrial radioisotopes in Brazil
  • Training of Latin American nuclear physicists
  • The Brazilian nuclear programme
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Sources✓ verified 2026-11-04