SMRTR Science & EngineeringJul 23, 2026Interesting Engineering

World’s largest nuclear fusion reactor adds HD Hyundai’s 5000-ton vacuum vessel part

SMRTR summary

Engineers at ITER's nuclear fusion facility in France placed the final vacuum vessel sector module into its central assembly space, completing a critical structural stage. HD Hyundai Heavy Industries built four of nine 400-ton steel sectors, each requiring millimeter-level precision to contain plasma exceeding 100 million degrees Celsius.

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