SMRTR Science & EngineeringJul 19, 2025Interesting Engineering

3D-printed steel survives month-long nuclear test in extreme reactor conditions

SMRTR summary

Oak Ridge National Laboratory tested 3D-printed stainless steel capsules in a high-power nuclear reactor for a month. The laser powder-bed fusion capsules withstood extreme conditions in the High Flux Isotope Reactor, proving additively manufactured components can meet nuclear safety standards. This breakthrough could enable faster, cheaper production of reactor parts and accelerate nuclear materials research. Researchers plan to expand 3D printing for custom experimental capsules and other reactor components.

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