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Civil Nuclear

In December 1942, beneath the abandoned squash court under Chicago's Stagg Field, Enrico Fermi's team pulled the cadmium control rods from a stack of graphite bricks and uranium slugs and watched the world's first self-sustaining nuclear chain reaction hold steady for 28 minutes before Fermi ordered the emergency rod called zip dropped back in and the pile went silent

On December 2, 1942, in a squash court beneath the University of Chicago's Stagg Field, Enrico Fermi's team ran the world's first self-sustaining nuclear chain reaction at about half a watt for 28 minutes — held in check by cadmium rods, an axe, and three buckets of cadmium sulfate solution.

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Civil Nuclear

A single cumulus cloud weighs roughly 500 tonnes, about the mass of 100 elephants, and it floats because the warm air holding those water droplets is still less dense than the cooler, heavier air pressing up beneath it.

A fair-weather cumulus cloud weighs about 500 tonnes — roughly the mass of 100 elephants — yet stays airborne because the warm air holding its microscopic droplets is less dense than the cooler air beneath it.

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Tracking the future of nuclear energy.

Nuclear Power Daily is an independent publication covering civil nuclear energy, reactor technology, regulation, safety, fuel cycles, and the policies and projects shaping nuclear power. The site pairs a deep archive with current reporting on the research, companies, policy shifts, safety debates, and technical breakthroughs shaping the future of nuclear energy. We employ modern AI technologies to support our editorial workflows; every published piece is editorially directed and reviewed.

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