I think this comment shouldn't be downvoted because it's a common misunderstanding rooted in how unintuitive it is that water is so good at blocking radiation.
> But just to be sure, I got in touch with a friend of mine who works at a research reactor, and asked him what he thought would happen to you if you tried to swim in their radiation containment pool. “In our reactor?” He thought about it for a moment. “You’d die pretty quickly, before reaching the water, from gunshot wounds.”
https://what-if.xkcd.com/29/