Question

Boron rods in a nuclear reactor are used to

• A. absorb excess neutrons
• B. absorb alpha particle
• C. slow down the reaction
• D. speed up the reaction

Answer 1

The correct option is A absorb excess neutrons

When a neutron collides with the uranium atom, then energy is released along with three more neutrons which further collide with another uranium atom an so the chain reaction continues. Thus boron rods in nuclear reactor are used to absorb excess neutrons so that the reaction rate remains under control.