The difference between prompt and delayed criticality lies in the source of neutrons that sustain the chain reaction. Prompt criticality occurs when the chain reaction is sustained solely by prompt neutrons, which are released almost instantaneously during the fission process. Delayed criticality occurs when the chain reaction is sustained by both prompt and delayed neutrons, which are emitted from the decay of certain fission products seconds or even minutes after the fission event. In a reactor operating at delayed criticality, the reactor power can be controlled a....
Log in to view the answer
