Officials say part of the Savannah River Site's most iconic symbols of the nuclear age has been removed.
Contractors on Tuesday dismantled the 75-foot-fall orange dome above a test reactor named "Hector."
The reactor - a relic from the Cold War - was built in 1959 and designed to test experimental fuel assemblies for commercial heavy-water power reactors.
It has been inactive for decades since the federal government decided in the 1960s to pursue other reactor designs.
The dome removal is part of a $25 million reactor decommissioning and deactivation project being funded by the American Recovery and Reinvestment Act.