Assertion: thorium's number | /r/CapableOf | use thorium
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Source sentences:
text: Today, most of the nuclear reactors available on the planet are using enriched uranium (U-235) or the reprocessed plutonium (Pu-239) as nuclear fuel in the Uranium-Plutonium (U-Pu) fuel cycle, and only a small number of nuclear reactors use thorium and the Thorium-Uranium (Th-U) fuel cycle.