Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
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Radioactive materials at the end of their useful life or in a product that is no longer useful and requires proper disposal. See High-level radioactive waste, Low-level radioactive waste, and Spent (depleted or used) nuclear fuel.
Page Last Reviewed/Updated Monday, September 14, 2026
