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The Nuclear Technology Portal
This symbol of radioactivity is internationally recognized.
is technology that involves the nuclear reactions
of atomic nuclei
. Among the notable nuclear technologies are nuclear reactors
, nuclear medicine
and nuclear weapons
. It is also used, among other things, in smoke detectors
and gun sights
. (Full article...
A nuclear weapon
(also known as an atom bomb
, atomic bomb
, nuclear bomb
or nuclear warhead
, and colloquially as an A-bomb
) is an explosive device that derives its destructive force from nuclear reactions
, either fission
(fission bomb) or from a combination of fission and fusion
reactions (thermonuclear bomb
). Both bomb types release large quantities of energy from relatively small amounts of matter.
The first test of a fission ("atomic") bomb released an amount of energy approximately equal to 20,000 tons of TNT (84 TJ). The first thermonuclear ("hydrogen") bomb test released energy approximately equal to 10 million tons of TNT (42 PJ). Nuclear bombs have had yields between 10 tons TNT (the W54) and 50 megatons for the Tsar Bomba (see TNT equivalent). A thermonuclear weapon weighing little more than 2,400 pounds (1,100 kg) can release energy equal to more than 1.2 million tons of TNT (5.0 PJ). (Full article...) (Full article...)
Credit: U.S. Army Corps of Engineers
In September 1945, many participants returned to the Trinity Test site for news crews. Here Oppenheimer and Groves examine the remains of one the bases of the steel test tower.
Did you know?
- ... that one of the most recognizable video-game glitches, a bug that forced Mahatma Gandhi in Civilization to use nuclear weapons heavily, never actually existed?
- ... that with his appointment to head the 12th Submarine Squadron, Rear-Admiral Andrei Volozhinsky commanded nearly 14 percent of strategic Russian warheads and 63 percent of Russia's naval strategic nuclear forces?
- ... that Nature's Fynd, producer of microbe-based meat substitutes, is working with NASA to develop a bioreactor for use in space travel?
- ... that American endocrinologist Jacob Robbins studied the effects of nuclear fallout in Hiroshima, Nagasaki, and Chernobyl on the development of thyroid cancer?
- ... that Otto Hahn was the sole recipient of the 1944 Nobel Prize in Chemistry, awarded for the discovery of nuclear fission?
- ... that according to his 2020 biography, Atomic Spy, Klaus Fuchs felt that passing secrets from his work on the Manhattan Project to the Soviet Union was for "the betterment of mankind"?
Things you can do
Here are some Open Tasks
List of nuclear tests, List of nuclear weapons, List of basic nuclear technology topics
Beta particle, General Atomics, Neutron economy, Critical size, Auxiliary feedwater, Power history, Uranium-233, Decay heat, Reactor vessel, Optoelectric nuclear battery, Radioisotope heater unit, Radioisotope piezoelectric generator, Fuel element failure, Fusion torch
- Nominate and vote: Science Collaboration of the Week, Article Improvement Drive
James Edward Westcott
(January 20, 1922 - March 29, 2019) was an American photographer who was noted for his work with the United States government in Oak Ridge
, during the Manhattan Project
and the Cold War
As one of the few people permitted to have a camera in the Oak Ridge area during the Manhattan Project, he created the main visual record of the construction and operation of the Oak Ridge production facilities and of civilian life in the enclosed community of Oak Ridge. (Full article...) (Full article...)
Nuclear technology news
- 17 September 2021 - AUKUS
- The Australian Defence Minister announces that the new strategic partnership will also include increased numbers of U.S. bombers and airplanes being based out of Australia. In addition, the Carnegie Endowment for International Peace notes that the deal has revealed a loophole in nuclear policy that does not bar states without nuclear weapons from obtaining nuclear technology for submarines and that this falls outside of IAEA inspections. (ABC News Australia) (Foreign Policy)
- 17 September 2021 - North Korea-United States relations
- In escalating tensions over the past week, North Korea accuses the United States of double standards when it comes to condemning missile tests, saying that the U.S. only condemned North Korea the same day that South Korea also tested missiles. North Korean state media cited its chief as saying that the American response was a "vivid revelation of the American-style double-dealing attitude" and also says that unless "the U.S. drops its hostile policies towards North Korea, denuclearization can never be put on the table" of negotiations. (Reuters)
- 16 September 2021 - AUKUS
- Indonesia's foreign affairs ministry expressed unease about Australia's dramatic expansion of its navy and using U.S. technology to build eight nuclear-powered submarines. A statement issued stated "Indonesia is deeply concerned over the continuing arms race and power projection in the region". (Brisbane Times)
- 15 September 2021 -
- U.S. president Joe Biden, U.K. prime minister Boris Johnson, and Australian prime minister Scott Morrison announce the formation of a new security alliance, named AUKUS, aimed at countering China's growing influence in the Indo-Pacific region. They also announce, as part of the alliance's first initiative, the Royal Australian Navy will be acquiring nuclear-powered submarines. (BBC)