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By Assistant Secretary Tim Walsh

Pumped storage hydropower (PSH) is one of the most-common and well-established types of energy storage technologies and currently accounts for 96% of all utility-scale energy storage capacity in the United States.

The Hydropower Market Reports provide a comprehensive picture of developments in the U.S. hydropower and pumped storage hydropower fleet and industry trends.

Decades of uranium enrichment operations at two former gaseous diffusion plants yielded thousands of cylinders of depleted uranium hexafluoride, or DUF6, that accumulated in storage yards. April 21, 2026

U.S. Department of Energy Office of Environmental Management teams are tackling extensive decommissioning and demolition efforts, transforming an area of the Savannah River Site into an asset for future development. April 21, 2026

Oak Ridge crews are deactivating Beta-4, as similar preparations for demolition draw to a close at another former Manhattan Project-era uranium enrichment facility, Beta-1, at the Y-12 National Security Complex. April 21, 2026

The Department of Energy’s Hanford Field Office is applying scientific innovation to accelerate cleanup progress. April 21, 2026

The U.S. Department of Energy’s Energy Technology Engineering Center team boosted its recent engagement efforts with visits to local volunteer groups and a tour of the Santa Susana Field Laboratory for Ventura County officials. April 21, 2026

The University of Georgia has named Savannah River Ecology Laboratory Director Olin E. Rhodes Jr. as a 2025–2026 University Professor, recognizing his contributions to research, teaching and service. April 21, 2026

Subject matter experts support new and existing construction efforts with research, analysis, and mentorship.