Energy & Green Tech
After over a decade of delays, the deafening sound of Finland's new Olkiluoto 3 nuclear reactor finally running its turbine at full power was welcomed with joy—and relief.
Oct 13, 2022
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Energy & Green Tech
Climate change risks undermining global energy security unless the use of renewables is dramatically scaled up, the UN warned Tuesday, suggesting the Ukraine conflict's ripple effects could speed up the green transition.
Oct 11, 2022
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Engineering
With no-wind-turbine signs on roadsides next to cornfields, it's hardly surprising that land use is a thorny issue for renewables. But how much land do different zero-carbon technologies really use?
Oct 6, 2022
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Energy & Green Tech
A nuclear power plant produces 8000 times more power than fossil fuels and is environmentally friendly, but when accidents do occur, they have major repercussions, such as the 1986 Chernobyl disaster. Nearly 100 people died ...
Oct 5, 2022
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Energy & Green Tech
To quit coal and move to renewables, we need large-scale energy storage. That's where pumped hydro comes in. Queensland's ambitious new plan involves shifting from a coal-dominated electricity grid to 80% renewables within ...
Oct 4, 2022
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Energy & Green Tech
The 100 MW Dalian Flow Battery Energy Storage Peak-shaving Power Station, with the largest power and capacity in the world so far, was connected to the grid in Dalian, China, on September 29, and it will be put into operation ...
Sep 29, 2022
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42
Engineering
For airliners, cargo ships, nuclear power plants and other critical technologies, strength and durability are essential. This is why many contain a remarkably strong and corrosion-resistant alloy called 17-4 precipitation ...
Sep 22, 2022
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Energy & Green Tech
Two ships carrying reprocessed nuclear fuel destined for Japan set sail Saturday morning from northern France, an AFP photographer said, despite criticism from environmental campaigners.
Sep 17, 2022
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Energy & Green Tech
A global search for alternative sources to Russian energy during the war in Ukraine has refocused attention on smaller, easier-to-build nuclear power stations, which proponents say could provide a cheaper, more efficient ...
Sep 10, 2022
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128
Computer Sciences
A student in Carnegie Mellon University's School of Computer Science (SCS) has used reinforcement learning to help control nuclear fusion reactions, a significant step toward harnessing the immense power produced in nuclear ...
Sep 9, 2022
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A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission or a combination of fission and fusion. Both reactions release vast quantities of energy from relatively small amounts of matter; a modern thermonuclear weapon weighing little more than a thousand kilograms can produce an explosion comparable to the detonation of more than a billion kilograms of conventional high explosive. Even small nuclear devices can devastate a city. Nuclear weapons are considered weapons of mass destruction, and their use and control has been a major aspect of international policy since their debut.
In the history of warfare, only two nuclear weapons have been detonated offensively, both near the end of World War II. The first was detonated on the morning of 6 August 1945, when the United States dropped a uranium gun-type device code-named "Little Boy" on the Japanese city of Hiroshima. The second was detonated three days later when the United States dropped a plutonium implosion-type device code-named "Fat Man" on the city of Nagasaki, Japan. These bombings resulted in the immediate deaths of around 120,000 people (mostly civilians) from injuries sustained from the explosion and acute radiation sickness, and even more deaths from long-term effects of ionizing radiation. The use of these weapons was and remains controversial. (See atomic bombings of Hiroshima and Nagasaki for a full discussion.)
Since the Hiroshima and Nagasaki bombings, nuclear weapons have been detonated on over two thousand occasions for testing purposes and demonstration purposes. The only countries known to have detonated nuclear weapons—and that acknowledge possessing such weapons—are (chronologically) the United States, the Soviet Union (succeeded as a nuclear power by Russia), the United Kingdom, France, the People's Republic of China, India, Pakistan, and North Korea. Israel is also widely believed to possess nuclear weapons, though it does not acknowledge having them. (For more information on these states' nuclear programs, as well as other states that formerly possessed nuclear weapons or are suspected of seeking nuclear weapons, see list of states with nuclear weapons.)
This text uses material from Wikipedia, licensed under CC BY-SA
