What color is nuclear waste?
Jessica Wood
Updated on January 06, 2026
Uranium mining and milling
The uranium-rich product is a yellow powder, called 'yellowcake' because of its colour. Yellowcake is a uranium oxide and is the raw material for manufacturing nuclear fuel. Milling produces very large amounts of crushed rock waste, known as 'tailings'.Is nuclear waste green?
It is a solid.It is arranged in fuel assemblies: sets of sealed metal tubes that hold ceramic uranium pellets. The radioactive byproducts of nuclear reactions remain inside the fuel. No green goo anywhere.