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Civil Nuclear

A single uranium fuel pellet the size of a fingertip holds roughly the energy of one tonne of coal, 149 gallons of oil, or 17,000 cubic feet of natural gas, and a typical reactor core contains about 10 million of them stacked into 12-foot zirconium rods.

A uranium fuel pellet the size of a fingertip holds roughly the energy of a tonne of coal — and a typical reactor core stacks about ten million of them into twelve-foot zirconium rods. Here's how the math, the metallurgy, and the physics actually work.

By Nuclear Power Daily Editorial Team · Jul 28, 2026

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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.

By Nuclear Power Daily Editorial Team · Jul 28, 2026
Civil Nuclear

What happened when engineers built a single eight-mile dam across a dying inland sea, cutting off the shrinking northern lobe from the salt flats below, and why did the fish come back within a decade?

In 2005, Kazakhstan closed the eight-mile Kok-Aral Dam across the strait dividing the Aral Sea, walling off its northern lobe from the salt flats to the south. Within a decade, salinity in the Small Aral had halved and fish catches climbed tenfold — from 400 tonnes a year to 4,000.

By Nuclear Power Daily Editorial Team · Jul 27, 2026
Civil Nuclear

In 1955, the town of Arco, Idaho drew every watt of its electricity for about an hour from an experimental fast breeder called BORAX-III sitting out on the desert flats, becoming the first community on Earth to light its streetlamps entirely with atoms splitting a few miles away.

On July 17, 1955, an experimental boiling water reactor called BORAX-III pushed 2,000 kilowatts across the Idaho desert and lit every home in Arco, Idaho, making a thousand-person town the first community on Earth powered entirely by fission — for about an hour, while most residents slept.

By Nuclear Power Daily Editorial Team · Jul 27, 2026
Civil Nuclear

The Oklo uranium deposit in Gabon ran as a natural nuclear reactor roughly 1.7 billion years ago, cycling on and off in three-hour pulses for hundreds of thousands of years before the first cells with a nucleus even existed on Earth.

In a Gabonese uranium deposit 1.7 billion years old, groundwater and rich U-235 combined to run a natural fission reactor in three-hour pulses for hundreds of thousands of years — the only confirmed natural reactor ever found on Earth.

By Nuclear Power Daily Editorial Team · Jul 22, 2026
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.

By Nuclear Power Daily Editorial Team · Jul 21, 2026

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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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