NUCLEAR WASTEHow and Where Is Nuclear waste stored in the U.S.?
Around the U.S., about 90,000 tons of nuclear waste is stored at over 100 sites in 39 states, in a range of different structures and containers. For decades, the nation has been trying to send it all to one secure location. Perhaps there will be a temporary site whose location passes muster with the Supreme Court. But in the meantime, the waste will stay where it is.
Around the U.S., about 90,000 tons of nuclear waste is stored at over 100 sites in 39 states, in a range of different structures and containers.
For decades, the nation has been trying to send it all to one secure location.
A 1987 federal law named Yucca Mountain, in Nevada, as a permanent disposal site for nuclear waste – but political and legal challenges led to construction delays. Work on the site had barely started before Congress ended the project’s funding altogether in 2011.
The 94 nuclear reactors currently operating at 54 power plants continue to generate more radioactive waste. Public and commercial interest in nuclear power is rising because of concerns regarding emissions from fossil fuel power plants and the possibility of new applications for smaller-scale nuclear plants to power data centers and manufacturing. This renewed interest gives new urgency to the effort to find a place to put the waste.
In March 2025, the U.S. Supreme Court heard arguments related to the effort to find a temporary storage location for the nation’s nuclear waste – a ruling is expected by late June. No matter the outcome, the decades-long struggle to find a permanent place to dispose of nuclear waste will probably continue for many years to come.
I am a scholar who specializes in corrosion; one focus of my work has been containing nuclear waste during temporary storage and permanent disposal. There are generally two forms of significantly radioactive waste in the U.S.: waste from making nuclear weapons during the Cold War, and waste from generating electricity at nuclear power plants. There are also small amounts of other radioactive waste, such as that associated with medical treatments.
Waste from Weapons Manufacturing
Remnants of the chemical processing of radioactive material needed to manufacture nuclear weapons, often called “defense waste,” will eventually be melted along with glass, with the resulting material poured into stainless steel containers. These canisters are 10 feet tall and 2 feet in diameter, weighing approximately 5,000 pounds when filled.
For now, though, most of it is stored in underground steel tanks, primarily at Hanford, Washington, and Savannah River, South Carolina, key sites in U.S. nuclear weapons development. At Savannah River, some of the waste has already been processed with glass, but much of it remains untreated.
