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EnergySolutions announced in 2016 with the support of the University of Arkansas, they had successfully petitioned the U.S. Department of Energy (DOE) for funding to complete the decommissioning of the Southwest Experimental Fast Oxide Reactor (SEFOR) facility. The final phase to decommissioning the facility commenced in 2016 and was successfully completed on time and budget in April 2019.

This decommissioning effort include the dismantlement of all above-grade structures, cleanout and removal of all systems, structures, and components from below grade, and the removal of the reactor and ancillary equipment. All of the radioactive waste was packaged and shipped to offsite licensed disposal facilities. The majority of the waste was shipped to the EnergySolutions disposal facility in the west desert of Utah.