ENES
United States United States · Mayagüez, Puerto Rico · 18.201, -67.143 (approximate location)

TRIGA Puerto Rico Nuclear Center

TRIGA Puerto Rico Nuclear Center, a research reactor (tRIGA) in Mayagüez, Puerto Rico, United States, with 2 MW of thermal power, operated by Center for Energy and Environmental Research (CEER). Decommissioned, first critical in 1972.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 30 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). 36 TRIGA reactors remain in operation today across 17 countries. It is one of 65 research reactors in 20 countries that General Atomics designed or built.

Country
United States
City
Mayagüez, Puerto Rico
Type
TRIGA
Thermal power
2 MW
Operator
Center for Energy and Environmental Research (CEER)
Design and construction
Designed by General Atomics
Status
Decommissioned
First criticality
1972
Purpose
Isotope production, teaching, materials testing

Data: IAEA RRDB · updated on Sep 3, 2026

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