
Feb. 12, 2026 -Commercial nuclear reactors all work pretty much the same way. Atoms of a radioactive material split, emitting neutrons. Those bump into other atoms, splitting them and causing them to emit more neutrons, which bump into other atoms, continuing the chain reaction.
That reaction gives off heat, which can be used directly or help turn water into steam, which spins a turbine and produces electricity. Today, such reactors typically use the same fuel (uranium) and coolant (water), and all are roughly the same size (massive). For decades, these giants have streamed electrons into power grids around the world. Their popularity surged in recent years as worries about climate change and energy independence drowned out concerns about meltdowns and radioactive waste. The problem is, building nuclear power plants is expensive and slow.