Atomic Energy of Canada Limited (AECL) is a company that creates and sells things called reactors, which are machines that make energy by splitting apart tiny parts inside of atoms. These tiny parts are called nuclei, and when they are split, they release a lot of heat, which can be used to make electricity.
AECL is a special kind of company because it is owned by the government of Canada, which means that the people who run the company work for the Canadian government. The company's job is to make reactors that are safe and efficient, which means that they work well and don't hurt people or the environment.
The reactors that AECL makes are used in many different ways. Some of them are used to make electricity that you use to power things in your home, like the lights or the TV. Other reactors are used to help doctors treat people who are sick with cancer.
Even though AECL is a big company, it's important to remember that the work they do is very important and helps us in many ways. But they have to be very careful to make sure that their reactors are safe and won't cause any harm.