nuclear fuel

American  

[noo-klee-er fyoo-uhl, nyoo-] / ˈnu kli ər ˈfju əl, ˈnju- /

noun

1. Physics. fissile or fertile material that undergoes fission in a nuclear reactor.

2. any light element, as hydrogen or helium, that undergoes fusion and gives off energy within the interior of stars.

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nuclear fuel British  

noun

1. a fuel that provides nuclear energy, used in nuclear power stations, nuclear submarines, etc

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Pronunciation

See nuclear ( def. ).

Etymology

Origin of nuclear fuel

First recorded in 1945–50

Example Sentences

See Examples For:

nuclear fuel

U.S. diplomats asked both to forswear making nuclear fuel.

From The Wall Street Journal ● Jul. 26, 2026

However, it needs to be "enriched" first, a process that involves increasing the concentration of uranium-235 isotope - the essential component of nuclear fuel.

From BBC ● Jun. 13, 2026

The doors slide open, revealing the entrance to what is expected to be the world's first permanent repository for radioactive spent nuclear fuel.

From Barron's ● Jun. 1, 2026

Above ground, the spent nuclear fuel will be encapsulated in highly corrosion-resistent copper canisters.

From Barron's ● Jun. 1, 2026

While uranium 235 fissions easily, nuclear fuel is not pure—it is made mostly of uranium 238, which does not fission.

From "Meltdown" by Deirdre Langeland