Mexico Mexico · Ocoyoacac, La Marquesa · 19.288, -99.382

TRIGA Mark III

TRIGA Mark III, a research reactor (tRIGA) in Ocoyoacac, La Marquesa, Mexico, with 1 MW of thermal power, operated by Instituto Nacional de Investigaciones Nucleares (ININ). Operating, first critical in 1968.

It is the most powerful research reactor in Mexico, of the 3 currently operating. It was the first research reactor in Mexico to go critical and is still operating 58 years later. It is one of 37 TRIGA reactors operating worldwide, spread across 18 countries. It is one of 66 research reactors in 21 countries that General Atomics designed or built.

Country
Mexico
City
Ocoyoacac, La Marquesa
Type
TRIGA
Thermal power
1 MW
Operator
Instituto Nacional de Investigaciones Nucleares (ININ)
Design and construction
Designed by General Atomics
Status
Operating
First criticality
1968
Purpose
Isotope production, teaching, training, activation analysis

Data: IAEA RRDB · updated on Sep 8, 2026

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