A thermal reactor is like a machine that helps us make electricity by using heat. It works like how mommy cooks food on the stove. The thermal reactor uses a special type of material called uranium to make this heat.
Uranium is tiny pieces that are mashed up together to make bricks. The thermal reactor takes these bricks and puts them in a big pot. When uranium is put close together in the pot, it gets hot and starts to release a lot of energy. This energy is called heat.
The heat from the uranium makes water that is outside the pot boil, which makes a lot of steam. This steam is like a hot, invisible cloud that turns a big fan called a turbine.
The spinning turbine makes a generator work, and this machine turns the energy from the steam into electricity we can use to power our homes and schools.
Just like how mommy needs to be careful when cooking food on the stove, thermal reactors need people to watch over them to make sure they work safely and don't get too hot. This helps us make clean, safe electricity to power our world.