The latest development, shared with Interesting Engineering through an email, involves the successful trial of Remountable Joints (RMJs)—precision connections that allow massive fusion magnets to be disassembled and reassembled for maintenance. Traditionally, fusion magnets are built as solid, permanent structures, which makes any internal repair or component replacement incredibly slow, complex, and expensive. A “bladder-based” innovation The STEP magnets team, working alongside the UK Atomic Energy Authority (UKAEA) and UK Industrial Fusion Solutions (UKIFS), has also unveiled a novel mechanical clamping system to support these joints. Aurobindo Siddarth Swaminathan, Principal Engineer for magnets at STEP Fusion, noted the speed of the project’s progression. This timeline requires the transition of fusion technology from a laboratory experiment into a reliable, industrial-scale energy source.