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United States United States · Aiken, SC · 33.549, -81.721 (approximate location)

SR-305 Savannah River

SR-305 Savannah River, a research reactor (graphite) in Aiken, SC, United States, with 50 W of thermal power, operated by DuPont Savannah River Site. Decommissioned, first critical in 1952.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 10 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). 4 graphite-moderated research reactors remain in operation today across 3 countries. Its declared uses include materials testing.

Country
United States
City
Aiken, SC
Type
Graphite
Thermal power
50 W
Operator
DuPont Savannah River Site
Status
Decommissioned
First criticality
1952
Purpose
Materials testing

Data: IAEA RRDB · updated on Sep 3, 2026

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