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Criticality (Noun)

A critical state; especially the point at which a nuclear reaction is self-sustaining.

Nouns denoting natural processes.

The reactor's criticality was achieved when the control rods were withdrawn to the precise calculated position.
Scientists carefully monitored the criticality of the experimental reactor to prevent an uncontrolled chain reaction.
The criticality of the nuclear core was maintained by adjusting the coolant flow and fuel enrichment.
Achieving criticality was a major milestone in the development of the new nuclear power plant.
The reactor's criticality was lost when the coolant system failed, causing the reaction to slow down and eventually stop.

A state of critical urgency.

Nouns denoting natural processes.

The team was working under conditions of criticality to meet the project deadline and prevent significant financial losses.
Due to the lack of available medical supplies, the hospital was operating under conditions of criticality and prioritizing patients based on the severity of their conditions.
The crew of the aircraft declared a state of criticality after discovering that one of the engines had failed during the flight.
In a state of criticality, the fire department responded quickly to the emergency call to save as many lives as possible.
With the threat of a hurricane looming over the city, emergency responders were working under conditions of criticality to evacuate residents and prepare for the worst-case scenario.