An advanced nuclear fuel's reliability is estimated using a combination of active learning, multi fidelity modeling, and subset simulation. A reliable nuclear fuel, TRISO, with low failure probabilities. To effectively estimate TRISO failure, active learning is used with multi fidelity modeling.
<h3>What is TRISO?</h3>
Tri-structural ISOtropic particle fuel is referred to as TRISO.
A fuel kernel consisting of uranium, carbon, and oxygen makes up each TRISO particle. Three layers of carbon- and ceramic-based materials that surround the kernel stop the discharge of radioactive fission products. The particles are extremely strong and incredibly little (about the size of a poppy seed). They can be produced into cylindrical pellets or "pebbles" the size of billiard balls for use in either high-temperature gas-cooled reactors or molten salt-cooled reactors. Compared to conventional reactor fuels, TRISO fuels are structurally more resistant to neutron radiation, corrosion, oxidation, and high temperatures (the conditions that have the greatest impact on fuel performance).
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