ITER and Industrial Partners Develop Specialized Robotics for Fusion Assembly and Maintenance

ITER and its industrial partners are developing a new generation of specialized robotics systems to assemble and maintain interior components of the international fusion reactor, tackling engineering challenges that conventional industries have never faced. These remote-handling technologies are essential because radiation levels will eventually prevent direct human access during high-power operations, requiring all in-vessel work to be performed by precision robotic systems.

Engineering at the Extreme

The scale and complexity of components being installed inside the ITER tokamak demand robotic capabilities that do not currently exist in mainstream industry. Shield blocks can weigh up to 4 tonnes, while divertor cassettes reach 9 tonnes—many of these components must navigate through narrow vessel openings and be positioned with extreme precision in an environment densely packed with cooling systems, structural frameworks, and plasma-facing materials.

Long-reach robotic arms, resembling industrial serpents, extend deep into the vacuum vessel through restricted ports to lift and maneuver these bulky components. One example is the blanket assembly transporter, a specialized robotic arm designed specifically to install shield blocks and first-wall components. According to Raphael Hery, ITER's handling and robotics expert, many of the systems being developed have no commercial market equivalent, representing a fundamental shift in what robotic technology can accomplish in constrained industrial environments.

Building for Tomorrow's Maintenance

The robotic technologies being developed for current assembly activities are simultaneously laying groundwork for future maintenance operations. Since ITER's in-vessel components were engineered from inception with remote handling in mind, the machines being constructed today will enable decades of reactor upkeep without exposing personnel to hazardous radiation exposure. This forward-looking design philosophy means each technological advancement serves dual purposes: immediate construction and long-term operational sustainability.

Educational Pipeline and Workforce Development

Beyond industrial applications, ITER is cultivating the next generation of robotics engineers through educational initiatives. A robotics competition held in southern France brought together 315 students across 25 teams from 19 schools, who spent six months designing and building small-scale robots that simulate ITER maintenance operations. Participants tackled challenges replicating remote handling tasks, transporting simulated tokamak components to repair facilities—mirroring the actual work that professional engineers perform at the fusion project.