Thank you and I'm glad you enjoyed the read!

This was possible only because the great questions users had sent me. I was afraid I would get only one or two questions, but I got so many good questions I had to make this post quickly before any more questions would appear.

I'm glad to hear of your experiences and thoughts about the topic. There will be challenges with nuclear-fuel recycling and storage, but we're seeing development on the field. Hopefully people will be ready to accept the tools we have.

And hope you found the answer on google. It's not betonite, but bentonite. For a brief explanation, you can read a bit on wikipedia:
https://en.wikipedia.org/wiki/Bentonite

Thank you for the comment!