Assertion: fission | /r/CapableOf | become self-sustaining
Facets:
Source sentences:
text: Nuclear fission becomes self-sustaining when the number of neutrons produced by fission equals or exceeds the number of neutrons absorbed by splitting nuclei plus the number that escape into the surroundings.
text: If there is enough radioactive material the fission may become self-sustaining, releasing a lot of energy at a controlled rate - say, in a nuclear reactor - or in a wildly uncontrolled rate - say, in a nuclear weapon.
text: Nuclear fission becomes self-sustaining when the number of neutrons produced by fission equals or exceeds the number of neutrons absorbed by splitting nuclei plus the number that escape into the surroundings.