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Criticality may refer to:

Physics terms[edit]

Nuclear-physics terms[edit]

  • Critical mass, referring to criticality in nuclear physics, when a nuclear reactor's fissionable material can sustain a chain reaction by itself
  • Criticality (status), a milestone in the commissioning of a nuclear power plant
  • Criticality accident, an uncontrolled nuclear chain reaction
  • Nuclear criticality safety, the prevention of nuclear and radiation accidents resulting from an inadvertent, self-sustaining nuclear chain reaction
  • Prompt critical, an assembly for each nuclear fission event

Other terms[edit]