• engineering, prompt criticality is the criticality (the state in which a nuclear chain reaction is self-sustaining) that is achieved with prompt neutrons...
    17 KB (2,218 words) - 22:39, 8 June 2025
  • A criticality accident is an accidental uncontrolled nuclear fission chain reaction. It is sometimes referred to as a critical excursion, critical power...
    49 KB (3,639 words) - 00:38, 9 June 2025
  • accident and 1986 Soviet Chernobyl disaster. Criticality accident Critical mass Prompt criticality "Criticality" (PDF). IAEA Safety Glossary. International...
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  • containing Prompt Prompt neutron, in nuclear engineering Prompt criticality This disambiguation page lists articles associated with the title Prompt. If an...
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  • calibrated to the interval between the conditions of criticality and prompt criticality. Prompt criticality will result in an extremely rapid power rise, with...
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    effective delayed neutron fractions can reach 50 pcm (1 pcm = 1e-5). Prompt criticality Critical mass Nuclear chain reaction "DOE Fundamentals Handbook - Nuclear...
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    a nuclear system can appear critical while not actually maintaining true criticality. This is called source criticality and due to a phenomenon called...
    43 KB (6,139 words) - 04:48, 22 June 2025
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    Retrieved May 18, 2014. Stater, Robert G. (December 13, 2012). "Prompt Criticality: A Concept with False Credentials". Nuke Facts. Archived from the...
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  • Look up criticality in Wiktionary, the free dictionary. Criticality may refer to: Critical phenomena, the collective name associated with the physics of...
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    produce a prompt critical configuration. This is known as an implosion type weapon. Criticality (status) Criticality accident Nuclear criticality safety...
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  • Thumbnail for Louis Slotin
    consisted of dangerous criticality testing, first with uranium in Otto Robert Frisch's experiments, and later with plutonium cores. Criticality testing involved...
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  • Prompt injection is a cybersecurity exploit in which adversaries craft inputs that appear legitimate but are designed to cause unintended behavior in machine...
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  • Thumbnail for Otto Robert Frisch
    in 1940. Leading the Los Alamos Critical Assemblies experiments in 1945, he oversaw the world's first prompt criticality in the Dragon device. Otto Robert...
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  • Thumbnail for Harry Daghlian
    performing criticality tests on the same plutonium core. After these two incidents it became known as the "demon core", and all similar criticality experiments...
    12 KB (1,151 words) - 11:24, 15 December 2024
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    LA-3611 A Review of Criticality Accidents, William R. Stratton, Los Alamos Scientific Laboratory, 1967 LA-13638 A Review of Criticality Accidents (2000 Revision)...
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    and finally compresses the core (pit) of fissionable material to a prompt critical state. They are usually machined from a plastic bonded explosive and...
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    Reactor, in 1968. On September 6, 1968, this reactor was the site of a prompt critical excursion during commissioning tests. This accident harmed no personnel...
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  • Thumbnail for International Nuclear and Radiological Event Scale
    1990 by the International Atomic Energy Agency (IAEA) in order to enable prompt communication of safety significant information in case of nuclear accidents...
    33 KB (2,030 words) - 03:47, 26 May 2025
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    being the threshold of slow criticality, meaning a steady reaction rate, while 1 $ is the threshold of prompt criticality, which means a nuclear excursion...
    42 KB (4,582 words) - 21:09, 17 June 2025
  • also measured in dollars, where one dollar is equal to a reactor in prompt criticality, this can then be used to calculate the change in reactivity required...
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    received a lethal dose of radiation when an error caused it to enter prompt criticality. He died 25 days later, on September 15, 1945, from radiation poisoning...
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  • requiring some fissile material to keep the reactor safely under prompt criticality: (e.g. 235 U in natural uranium and preferably also some moderator...
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    withdrawn and criticality is approached the number increases because the absorption of neutrons is being progressively reduced, until at criticality the chain...
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    regulatory oversight. There was no criticality accident alarm (because the licensing board incorrectly concluded that a criticality accident could not happen)...
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    reaction also releases ~7 MeV in prompt gamma ray photons. The latter figure means that a nuclear fission explosion or criticality accident emits about 3.5%...
    76 KB (9,902 words) - 11:13, 17 June 2025
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    of the missile as part of the service's Intermediate-Range Conventional Prompt Strike (IRCPS) program. The weapon consists of a large rocket booster that...
    27 KB (1,928 words) - 09:24, 5 May 2025
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    causing a small portion of the core to reach a state of runaway prompt criticality and leading to a massive energy release, resulting in the explosion...
    19 KB (2,300 words) - 17:23, 2 December 2024
  • Thumbnail for Fukushima nuclear accident (Unit 3 Reactor)
    that exposed rods will reach criticality. "The possibility of re-criticality is not zero", a TEPCO spokesman said. "Criticality Safety in the Waste Management...
    53 KB (4,951 words) - 06:48, 27 April 2025
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    PRINCE2 (redirect from PROMPT 2)
    acquisition of AXELOS. PRINCE was derived from an earlier method called PROMPT II (Project Resource Organisation Management Planning Techniques). In 1989...
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  • Thumbnail for Acute radiation syndrome
    Accidental exposure may be the result of a criticality or radiotherapy accident. There have been numerous criticality accidents dating back to atomic testing...
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