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United States United States · Hawthorne, CA · 33.917, -118.349 (approximate location)

TRIGA Mark F, Northrop

TRIGA Mark F, Northrop, a research reactor (tRIGA) in Hawthorne, CA, United States, with 1 MW of thermal power, operated by Space Radiation Laboratory. Decommissioned, first critical in 1963.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 21 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
Hawthorne, CA
Type
TRIGA
Thermal power
1 MW
Operator
Space Radiation Laboratory
Design and construction
Designed by General Atomics
Status
Decommissioned
First criticality
1963
Purpose
Activation analysis, materials testing

Data: IAEA RRDB · updated on Sep 3, 2026

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