What if you swam in a nuclear storage pool?

xkcd's What If?2 HN recommenders · 2024–2025
3.2M views · explainer · evergreen · Uploaded 2024-04-02

Randall Munroe of xkcd answers what would happen if you swam in a spent nuclear fuel pool, and how much radiation you would receive at the surface versus at depth.

Recommended whenever a thread asks how dangerous it is to fall into a reactor or fuel pool.

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4 comments from Hacker News

@throw0101c2024 · in “A New Specialized Train Is Ready to Haul Nuclear Waste”

> Revell River is a watershed for local communities, and South Bruce is a farming community. Thus, expect to be sued by dozens of folks... Not “if” but “when” the site inevitably leaks like the identical facilities in the US and Germany. Given that the storage will be several hundred metres below the surface and the water table of (e.g.) the Bruce area is at ~35m: * [LINK] Not sure what such an incident would really do. Especially since the Bruce nuclear plant is already storaging spent fuel on-site for about forty years, so it's not much different if that location is picked. > If it was such a great safe idea, why not install it in downtown New York or Washington? Good jobs program right... ;) Sure. Things are currently held on-site at nuclear plants, and they can continue to do so indefinitely IMHO. I'm in Toronto, ~50km from the Pickering plant, and I'd be fine with that. I good friend of mine has lived in Pickering all his life and doesn't give it a second thought. Heck, if OPG wants to build a spent fuel pool in my backyard I'd be happy to accept it: free year-round "ground-source" heating/cooling for me. * [LINK] * [VIDEO]

@cpeterso2024 · in “The meme-ification of the “Demon Core””

> He took a dip in a pool with a functioning nuclear pile xkcd published a What If? video about the consequences of swimming in a nuclear fuel pool: [VIDEO]

@seanmcdirmid2025 · in “A worker fell into a nuclear reactor pool”

Doesn’t it depend on how far they sink? I’m pretty sure xkcd did a comic on this. Oh, it’s a video, here it is: [VIDEO] Edit: ok, I’m probably the fiftieth person to point this out. It’s still a good video.

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@benmathes2025 · in “A worker fell into a nuclear reactor pool”

XKCD has a good video about this. The top of the water is remarkably safe, and a life vest would keep you up there! [VIDEO]

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