criticality
Noun
Meaning
a critical state; especially the point at which a nuclear reaction is self-sustaining
a state of critical urgency
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As it heats, the graphite expands, separating the fuel and reducing the reactor's criticality.
At a seminar in February 2012 it was revealed that the reactors on board the submarine could re-achieve criticality and explode (a buildup of heat leading to a steam explosion vice nuclear).
Had faults occurred on both circuits at the same time, as happened in March 2013 following the collapse of several towers in Kintyre, customer supplies in the area would have been interrupted, demonstrating the criticality of these works.
Diverse systems with the same critical exponents—that is, which display identical scaling behaviour as they approach criticality —can be shown, via renormalization group theory, to share the same fundamental dynamics.
However, light hydrogen is also fairly effective at absorbing neutrons, and there will be too few left over to react with the small amount of 235 U in natural uranium, preventing criticality.
He further added that this is due to its criticality in the facilitation of economic development.