system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 What happens to the radioactiveness of nuclear waste we bury?

Like, wouldnt the container we place nuclear waste in hold in the radioactivity? making the container not safe to open ever, because opening it would release all the contained radio activity?
gpt
"Radioactivity" is not like Water or anything you can store. It's more like light. 
If you put waste into a box and seal it "radioactivity-tight" it is like placing a flashlight into a blacked out box. The light is not stored. As soon as the batteries are empty there is no light anymore. 

Both are forms of energy or "energy-vectors". They transfer energy into whatever they encounter on their way. They heat it up and this heat is transferred outside the containmet vessel and not harmful anymore.