Inside the biggest nuclear power plant tear-down in the U.S.

Popular Science | 1/13/2018 | Staff
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At the San Onofre nuclear power plant, workers transfer 2,668 fuel assemblies—holding 1,109 metric tons of radioactive uranium-235—to 17-foot-tall stainless-­steel containers. These sit inside a deep, steel-lined cooling pool for several years, chilling at temperatures around 68 degrees Fahrenheit, until workers can move them to storage.

After the fuel cools, workers fit the canisters into 20-foot-deep concrete casks embedded in the ground. The concrete helps trap the fuel’s radiation inside, while vents circulate air to keep it cool. These casks,...
(Excerpt) Read more at: Popular Science
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