SMRTR Science & EngineeringSep 10, 2025Interesting Engineering

Lead-cooled nuclear reactors promise safe, reliable energy for merchant vessels

SMRTR summary

Swiss firm ABB and Swedish company Blykalla are partnering to deploy small modular lead-cooled nuclear reactors on merchant ships. The 55-megawatt SEALER reactor uses passive safety systems without requiring external cooling or constant oversight, making it ideal for maritime use as shipping faces pressure to reduce its 3% contribution to global emissions.

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