• Criticality is defined in terms of a sustained chain reaction. Discuss keff for a critical reaction and how each term in keff influences the neutron life cycle, including design considerations that can be applied to guard against unplanned criticality events.
• Discuss the similarities, differences, and consequences in early criticality accidents in the history of criticality safety.
• Compare and contrast nuclear criticality accidents with nuclear decay heat accidents in TMI-2, Chernobyl, and Fukushima.

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Criticality in a nuclear context refers to a sustained chain reaction The parameter keff is crucial ... View the full answer