You often listen that a reactor has gained ldquo criticality rdquo What does it mean ........

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You often listen that a reactor has gained “criticality”. What does it mean?

A nuclear reactor is producing and losing a constant number of neutrons, and the nuclear energy system is stable.

A state that produces more neutrons than are lost.

It describes a situations with potential for disaster.

None of the above

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Explanation:

First option is correct.

The criticality of a system can be calculated by comparing the rate at which neutrons are produced, from fission and other sources, to the rate at which they are lost through absorption and leakage out of the reactor core. A nuclear reactor is a system that controls this criticality or balance of neutrons.