https://www.energy.gov/ne/articles/5-fast-facts-about-spent-nuclear-fuel
The U.S. generates about 2,000 metric tons of used fuel each year
This number may sound like a lot, but it’s actually quite small. In fact, the U.S. has produced roughly 83,000 metrics tons of used fuel since the 1950s—and all of it could fit on a single football field at a depth of less than 10 yards.