SMRTR Science & EngineeringJul 5, 2026Interesting Engineering

STEP tokamak gets modular fusion reactor core design to reduce downtime, boost maintenance

SMRTR summary

The UK's STEP fusion reactor is ditching traditional single-piece welded chambers in favor of stackable, ring-shaped modules that can be individually removed and replaced during maintenance. This design, revealed through two newly filed patents, also includes a flexible sealing system to maintain the near-perfect vacuum fusion reactions require.

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