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In nuclear physics, a nuclear chain reaction occurs when one single nuclear reaction causes an average of one or more subsequent nuclear reactions, thus leading to the possibility of a self-propagating series or "positive feedback loop" of these reactions. The specific nuclear reaction may be the fission of heavy isotopes (e.g., uranium-235 ...
On 2 December 1942, the first human-made self-sustaining nuclear chain reaction was initiated in CP-1 during an experiment led by Enrico Fermi. The secret development of the reactor was the first major technical achievement for the Manhattan Project, the Allied effort to create nuclear weapons during World War II.
A natural nuclear fission reactor is a uranium deposit where self-sustaining nuclear chain reactions occur. The idea of a nuclear reactor existing in situ within an ore body moderated by groundwater was briefly explored by Paul Kuroda in 1956. [1]
Fusion ignition is the point at which a nuclear fusion reaction becomes self-sustaining. This occurs when the energy being given off by the reaction heats the fuel mass more rapidly than it cools. In other words, fusion ignition is the point at which the increasing self-heating of the nuclear fusion removes the need for external heating. [1]
The unit of Atlanta-based Southern Co. said operators reached self-sustaining nuclear fission inside the reactor at Plant Vogtle, southeast of Augusta. Plant Vogtle’s Unit 4 is now supposed to ...
In nuclear engineering, a critical mass is the smallest amount of fissile material needed for a sustained nuclear chain reaction. The critical mass of a fissionable material depends upon its nuclear properties (specifically, its nuclear fission cross-section ), density, shape, enrichment , purity, temperature, and surroundings.
The National Nuclear Security Administration, which oversees the nuclear weapons stockpile, is funding both Scorpius and Zeus, a machine that will measure the rate of the nuclear chain reaction.
Nuclear Energy is on Ellis Avenue, between the Max Palevsky West dormitory and the Mansueto Library in the Hyde Park community area of Chicago.It sits on a square, granite paved, concrete platform at the spot where the Manhattan Project team built a nuclear reactor to produce the first self-sustaining controlled nuclear reaction, under the now-demolished west stands of the old Stagg Field.