Superman's Pal Jimmy Olsen was a considerably better book that it had any right to be. From its early attempts to present Jimmy Olsen as a tough guy -- he punched out a mobster at least once an issue in the first year -- to its later use as Jack Kirby's jumping-off point for the Fourth World -- he was given any choice of book to write for by DC and picked Jimmy Olsen because it had no regular writer and, therefore, no one would lose their job -- the book was a veritable hayride of wackiness. Admittedly, my fondness for the series might be a little influenced by the fact that I read most of the Volume 1 phonebook reprint after being awake for roughly 30 hours, but it's still one of my favorite comics, and one of the most original books I've ever read.
Anyway, combining my love for this comic and for 1950's blase treatment of radioactivity is this page. Keep in mind that what you're reading is the completely innocuous framing device; in fact, I suspect the only reason they're using uranium is because it's more modern-ca.-1955 than gold. The actual story involves Jimmy and Superman tricking these kids into thinking they are wildly hallucinating because they were too cocky about trying to find all that ore. Or something. You can find the whole story in the reprint book I linked above, which I heartily recommend whether you enjoy this page or not.