The world needs a new source of energy, an unspillable source.

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(may be broke/outdated!)

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  1. Electron absorbing rods are installed to slow down the reaction rate. The less free electrons bouncing around ripping open molecules the slower the reaction!

  2. It really depends on the type of nuclear reactor; however, for a PWR (pressurized water reactor) some of the ways that the reaction is controlled are:

    1. Control rods. These rods are made of materials that absorb neutrons so that they cannot cause the uranium or plutonium to fission. The further the rods are inserted into the core, the smaller the number of neutrons that are available for fissioning. If the control rods are completely inserted into the core, the reaction will stop.
    2. They use borated water in the cooling system to absorb some of the free neutrons.

how is the rate of fission in a nuclear reactor controlled?

just a brief explanation would be nice:]