Saying that nuclear fuels "burn" when you cause them to undergo fission in a reactor is a common colloquialism. Hence standard terms like "burnup rates" when d

Saying that nuclear fuels "burn" when you cause them to undergo fission in a reactor is a common colloquialism. Hence standard terms like "burnup rates" when describing the efficiency of reactors. https://en.wikipedia.org/wiki/Burnup https://en.wikipedia.org/wiki/Burnup