The purpose of the proposed action evaluated in this environmental assessment (EA) is the processing of uranium-233 (233U) stored at the Oak Ridge National Laboratory (ORNL) and other small quantities of similar material currently stored at other U. S. Department of Energy (DOE) sites in order to render it suitable for safe, long-term, economical storage. The 233U is stored within Bldg. 3019A, which is part of the Bldg. 3019 Complex. The location of the Bldg. 3019 Complex is shown on Fig. 1.1. Additionally, the proposed action would increase the availability of medical isotopes needed for research and treatment and place the Bldg. 3019 Complex in safe and stable shutdown for transfer to the DOE program for decontamination and decommissioning (D&D). DOE has determined that there is no programmatic use for the 233U currently in storage at ORNL other than as a possible source of medical isotopes.