ORNL Robot Prints Steel Nuclear Vessel As Supply-Chain Test Case
Oak Ridge National Laboratory used a three-armed robotic system to 3D print a steel nuclear pressure vessel, pairing the demonstration with work on qualification methods for energy components.
A three-armed robot at Oak Ridge National Laboratory has turned molten steel into a three-by-five-foot nuclear pressure vessel, Interesting Engineering reported, giving advanced manufacturing advocates a concrete test case for parts that normally depend on scarce forging and welding capacity.
The Tennessee demonstration was one of the centerpieces of ORNL's Materials and Manufacturing Innovation Days, where more than 350 leaders from industry, energy, manufacturing, technology, defense and four Department of Energy offices met to discuss faster routes from laboratory systems to factory use.
ORNL and its partners framed the work around a supply-chain problem rather than a laboratory showcase.
Heavy 3D printing, AI-driven automation, robotics and digital engineering are being pushed as ways to reduce dependence on irregular suppliers and hard-to-find skilled labor.
In infrastructure sectors such as hydropower, major custom components can now take more than ten years to obtain.
The MedUSA robotic system provided the steel example.
Its three arms guided molten metal into a pressure-vessel shape with complex domed geometry, creating a large metal component that would usually move through conventional large-scale forging and welding.
The project was designed as a test of whether additive manufacturing can become a practical alternative for parts constrained by domestic production capacity.
A second nuclear-energy structure showed a different materials path.
Researchers working with the University of Maine printed a 12-foot glass-fiber polymer model of an impact limiter, the protective structure used around spent nuclear fuel shipping containers.
The model replaces traditional wood designs with a strong plastic approach and gives the program another way to test large, safety-related components.
MDF Director Ryan Dehoff said the laboratory wants industry input to guide research and ensure that work at Oak Ridge and the Manufacturing Demonstration Facility accounts for the supply chains needed to commercialize new technologies.
That commercial step is where the deployment challenge narrows.
Forum participants identified resilient supply chains, alternative materials and faster part qualification as urgent requirements.
Printing a component does not put it into service by itself; nuclear and energy hardware still needs certification before it can be used in operating systems.
ORNL is also working with Idaho National Laboratory on common digital qualification practices that can travel from one facility to another.
Build data would be captured as parts are made, using sensors, machine-learning analysis and defect records so regulators can evaluate additively manufactured nuclear and energy hardware on a shorter certification timetable.
New partnerships with companies including SLB and Kairos Power extend the work beyond a single demonstration.
The pressure vessel and impact limiter show the manufacturing route; qualification data and industry adoption will determine whether the lab-floor tests become deployable industrial tools.
