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Triso particles are an alien-looking fuel with built-in safety features that will prevent reactor meltdowns

Triso particles are an alien-looking fuel with built-in safety features that will prevent reactor meltdowns

COURTESY OF X ENERGY

COURTESY OF X ENERGY

Triso particles are an alien-looking fuel with built-in safety features that will prevent reactor meltdowns

Nuclear ‘Power Balls’ May Make Meltdowns a Thing of the Past

Triso— short for “tristructural isotropic”—fuel is made from a mixture of low enriched uranium and oxygen, and it is surrounded by three alternating layers of graphite and a ceramic called silicon carbide. Each particle is smaller than a poppy seed, but its layered shell can protect the uranium inside from melting under even the most extreme conditions that could occur in a reactor.

There are other benefits too. Rather than needing to have miles of open space around a reactor, future plants running on triso fuel could be situated close to their users, Sell says. “It is physically impossible—as in, against the laws of physics—for triso to melt in a reactor,” says Sell. “And when you start with a reactor that can’t melt, your safety case completely changes.”

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