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Micro Reactor by Fuel Type as of December 2025Source: neutronbytes@gmail.com
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FirmReactor TypeFuel Type and FormU-235 Enrichment Level
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Aalo AtomicsExperimental Reactor (Aalo-X)Uranium Dioxide (UO2​) pellets in fuel pins{5%} (Low-Enriched Uranium - LEU)
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Antares NuclearMicroreactorTri-structural Isotropic (TRISO) particle fuel (ceramic-coated uranium)between {5%} and {19.5%)
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Atomic AlchemyNot SpecifiedNot SpecifiedNot Specified
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Deep FissionDeep Borehole Pressurized Water Reactor (DB-PWR) UO2​ pellets, typical of Pressurized Water Reactors (PWRs)3% to 5% (Low-Enriched Uranium - LEU)
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Last EnergySMR (PWR derivative) UO2​ pellets, typical of Pressurized Water Reactors (PWRs)3% to 5% (Low-Enriched Uranium - LEU)
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OkloAurora Powerhouse (Fast Reactor)Metallic fuel; High-Assay Low-Enriched Uranium (HALEU)19.5% HALEU metal uranium
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Natura ResourcesMolten Salt Reactor (MSR)Uranium Tetrafluoride (UF4​) dissolved in a molten salt mixtureTypically 5% to 19.5 %HALEU) but potentially lower
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Radiant IndustriesKaleidos MicroreactorTri-structural Isotropic (TRISO) particle fuel (ceramic-coated uranium)Uses High-Assay Low-Enriched Uranium (HALEU) 9-19.5%
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Terrestrial EnergyIntegral Molten Salt Reactor (IMSRR◯)Uranium Tetrafluoride (UF4​) blended with carrier salts (liquid fuel)(Standard Assay Low-Enriched Uranium - LEU) <5%
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Valar AtomicsMicroreactorTri-structural Isotropic (TRISO) particle fuel (ceramic-coated uranium)Uses High-Assay Low-Enriched Uranium (HALEU) 9-19.5%
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