DENVER–(BUSINESS WIRE)–Xcimer Energy today announced that the U.S. Department of Energy (DOE) has formally approved the company’s preconceptual design and technology development roadmap milestone for Athena, Xcimer’s architecture for fusion power plants.The milestone positions Xcimer among the front runners to commercialize fusion energy and marks one of the industry’s most comprehensive government reviews of a privately developed fusion plant architecture. The acceptance of both the design an