Cocooning of Hanford’s K East Reactor begins

June 29, 2022, 7:00AMRadwaste Solutions
The first steel columns, each weighing up to 28 tons, were placed for a cocoon over the former K East Reactor building at the Hanford Site. (Photo: DOE-EM)

The Department of Energy’s Office of Environmental Management (EM) said that construction is well underway on a protective enclosure, or cocoon, for the K East Reactor building at the Hanford Site near Richland, Wash.

EM reports that is has achieved one of its key construction priorities for 2022 by beginning construction of the enclosure, which is designed to protect the reactor building while the radioactivity in the deactivated reactor core decays over the next several decades, making it safer and easier to decommission.

A time-lapse video showing the construction of the cocoon’s massive 120-foot steel frame can be seen here.