Hallam Nuclear Generating Station
Encyclopedia
The Hallam Nuclear Generating Station in Nebraska
Nebraska
Nebraska is a state on the Great Plains of the Midwestern United States. The state's capital is Lincoln and its largest city is Omaha, on the Missouri River....

 was the site of an experimental graphite-moderated sodium cooled reactor. It was located near Hallam
Hallam, Nebraska
Hallam is a village in Lancaster County, Nebraska, United States. It is part of the Lincoln, Nebraska Metropolitan Statistical Area. The population was 276 at the 2000 census.-Geography:Hallam is located at ....

, about 25 miles southwest of Lincoln
Lincoln, Nebraska
The City of Lincoln is the capital and the second-most populous city of the US state of Nebraska. Lincoln is also the county seat of Lancaster County and the home of the University of Nebraska. Lincoln's 2010 Census population was 258,379....

. The graphite moderator was clad in stainless steel. There were issues with the cladding, corrosion and stress cracking led to the failure of the cladding cans. Correcting the failure would have been expensive so the plant was decommissioned and the nuclear components sealed in concrete.

Construction started in 1958. The plant operated from 1962 to 1964. Decommissioning was completed in 1969.

Currently the site holds a fossil-fuel plant, Sheldon Station.
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