Question

What part of a nuclear fuel rod is reused for nuclear weapons after its spent?

Answer 1

Answer:

Uranium

Explanation:

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Answer 2

Most of it – about 96% – is uranium, of which less than 1% is the fissile U-235 (often 0.4-0.8%); and up to 1% is plutonium. Both can be recycled as fresh fuel, saving up to 30% of the natural uranium otherwise required.