Void coefficient

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Notion

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Science and technology

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What Wikipedia says

In nuclear engineering, the void coefficient (more properly called void coefficient of reactivity) is a number that can be used to estimate how much the reactivity of a nuclear reactor changes as voids (typically steam bubbles) form in the reactor moderator or coolant.

Excerpt from the Wikipedia article “Void coefficient”, under the CC BY-SA 4.0 license. Read the article on Wikipedia