[credit_guy]

If you still have the popcorn handy, here’s other stuff they did with Uranium in the ‘50s. Atomic energy science kits for kids

  https://spectrum.ieee.org/fun-and-uranium-for-the-whole-family-in-this-1950s-science-kit

Now, after you enjoyed the fun and the popcorn, I might point out that we are not in the 1950s anymore.

The safety of nuclear energy is something regulated by the NRC. I have never heard anyone accusing the NRC for being lax.

Here’s a link with the NRC approval of NuScale’s SMR reactor

  https://www.nrc.gov/reactors/new-reactors/smr/nuscale.html

If you browse through those links you will find out the approval consists in a few thousand pages. Only the requests for additional information form a list of 149 pages, at about 10-20 requests per page

https://www.nrc.gov/reactors/new-reactors/new-licensing-file...

A very conservative estimate would put the regulatory effort at a few hundred thousand man-hours of work, and the work on NuScale’s side to be in the millions of man-hours.