Critical Size

The critical size is the minimum size of a nuclear reactor core or nuclear weapon that can be made for a specific geometrical arrangement and material composition. The critical size must at least include enough fissionable material to reach critical mass. If the size of the fissionable material is less than a certain minimum, fission neutrons escape through its surface and the chain reaction is not sustained.


Famous quotes containing the words critical and/or size:

    “The critical spirit never knows when to stop meddling.”
    —Mason Cooley (b. 1927)

    “Eat your meals according to the size of your bowl.”
    —Chinese proverb.