The U.S. Department of Energy (DOE) Office of Emergency Management Assessments, within the independent Office of Enterprise Assessments (EA), assessed the adequacy of maintaining emergency preparedness capabilities at the Y-12 National Security Complex (Y-12). This assessment is part of a targeted review of emergency preparedness for high-hazard facilities within the DOE/National Nuclear Security Administration (NNSA). This targeted review evaluated the processes for identifying and maintaining emergency response capabilities in a state of readiness to protect the health and safety of workers and the public for any incident, whether natural or manmade, that requires response action beyond normal operations.