ELI5: Explain Like I'm 5

MOX fuel

So you know how sometimes we put different types of fuel in our cars to make them run? Well, it's kind of the same idea with nuclear reactors that make electricity.

MOX fuel is a special kind of fuel used in some nuclear reactors. It's made from a mixture of two different materials - one is called plutonium and the other is called uranium.

Now, plutonium and uranium are kind of like Lego blocks - they have different shapes and sizes. When we mix them together, we create a new kind of Lego block that can fit into the reactor and make the nuclear reactions happen.

Using MOX fuel can help us make more energy from the same amount of resources, which is good for the environment! But it's also kind of tricky to make and handle safely, so scientists and engineers have to be very careful when working with it.