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United States United States · Washington, DC · 38.895, -77.037 (approximate location)

NRR Naval Research Reactor

NRR Naval Research Reactor, a research reactor (pool) in Washington, DC, United States, with 1 MW of thermal power, operated by US Navy. Decommissioned, first critical in 1956.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 14 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). 48 pool-type reactors remain in operation today across 28 countries. Its declared uses include materials testing.

Country
United States
City
Washington, DC
Type
Pool
Thermal power
1 MW
Operator
US Navy
Status
Decommissioned
First criticality
1956
Purpose
Materials testing

Data: IAEA RRDB · updated on Sep 3, 2026

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