ELI5: Explain Like I'm 5
Examples: in situ, ghost, spin, rockets, muon

Long-lived fission products

Hey kiddo! Do you remember when we talked about nuclear energy and how it works? Well, one of the things that happens when we use nuclear energy is that we create some things called "long-lived fission products".

Now, these fission products are kind of like leftovers from when we use nuclear energy. They're the parts of the atoms that are left behind after we split them apart to make energy. And they can be harmful to us and the environment if we don't handle them carefully.

The reason we call them "long-lived" is because they stick around for a really, really long time. Like, way longer than you or I will be alive! Some of these fission products can take hundreds or thousands of years to break down into harmless things.

That's why we have to be very careful with how we store them. We don't want to accidentally let them get into the air or water, where they could hurt people or animals.

It's kind of like when you have leftover food that you can't eat anymore. You have to put it in the refrigerator so it doesn't go bad and make you sick. We have to do the same thing with these long-lived fission products. We have to store them in places where they won't hurt anyone until they break down into harmless things.

Does that make sense, kiddo?