Here's the breakdown:
* Boron is used in control rods because it absorbs neutrons very effectively. This is crucial in nuclear reactors to control the rate of fission reactions.
* The number of control rods depends on the specific reactor design. Some reactors may use dozens or even hundreds of control rods.
* The composition of control rods can vary. While boron is a common element, other materials like cadmium and silver may also be used.
So, rather than counting the number of control rods, focus on their role and composition. Boron's ability to absorb neutrons makes it a key component in ensuring the safe and controlled operation of nuclear reactors.
