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Noun
1. criticality accident (in the nuclear industry)
Wikipedia definition
2. Criticality accidentA criticality accident, sometimes referred to as an excursion or a power excursion, is an accidental increase of nuclear chain reactions in a fissile material, such as enriched uranium or plutonium. This releases a surge of neutron radiation which is highly dangerous to humans and causes induced radioactivity in the surroundings.
Read “Criticality accident” on English Wikipedia
Read “臨界事故” on Japanese Wikipedia
Read “Criticality accident” on DBpedia

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