ENES
United States United States · Boston · 42.360, -71.096

MITR-II Masschusetts Inst. of Tech.

MITR-II Masschusetts Inst. of Tech., a research reactor (tank) in Boston, United States, with 6 MW of thermal power, operated by Massachusetts Institute of Technology. Operating, first critical in 1958.

It is one of the 48 research reactors operating in the United States. It went critical 16 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). It is one of 36 tank-type reactors operating worldwide, spread across 23 countries. Its declared uses include isotope production, teaching, training and activation analysis.

Country
United States
City
Boston
Type
Tank
Thermal power
6 MW
Operator
Massachusetts Institute of Technology
Status
Operating
First criticality
1958
Purpose
Isotope production, teaching, training, activation analysis, neutron capture therapy, materials testing

Data: IAEA RRDB · updated on Sep 3, 2026

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