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Philip.paulsson
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Spent Fuel Pool
Philip.paulssonI wanna swim in a radiation pool!
Spent Fuel Pool
What if I took a swim in a typical spent nuclear fuel pool? Would I need to dive to actually experience a fatal amount of radiation? How long could I stay safely at the surface?
—Jonathan Bastien-Filiatrault
Assuming you’re a reasonably good swimmer, you could probably survive treading water anywhere from 10 to 40 hours. At that point, you would black out from fatigue and drown. This is also true for a pool without nuclear fuel in the bottom.
Spent fuel from nuclear reactors is highly radioactive. Water is good for both radiation shielding and cooling, so fuel is stored at the bottom of pools for a couple decades until it’s inert enough to be moved into dry casks. We haven’t really agreed on where to put those dry casks yet. One of these days we should probably figure that out.
Here’s the geometry of a typical fuel storage pool:

The heat wouldn't be a big problem. The water temperature in a fuel pool can in theory go as high as 50°C, but in practice they're generally between 25°C and 35°C—warmer than most pools but cooler than a hot tub.
For the kinds of radiation coming off spent nuclear fuel, every 7 centimeters of water cuts the amount of radiation in half.
The most highly radioactive fuel rods are those recently removed from a reactor. Based on the activity levels provided by Ontario Hydro in this report, this would be the region of danger for fresh fuel rods:

Swimming to the bottom, touching your elbows to a fresh fuel canister, and immediately swimming back up would probably be enough to kill you.
Yet outside the outer boundary, you could swim around as long as you wanted—the dose from the core would be less than the normal background dose you get walking around. In fact, as long as you were underwater, you would be shielded from most of that normal background dose. You may actually receive a lower dose of radiation treading water in a spent fuel pool than walking around on the street.

That’s if everything goes as planned. If there’s corrosion in the spent fuel rod casings, there may be some fission products in the water. They do a pretty good job of keeping the water clean, and it wouldn’t hurt you to swim in it, but it’s radioactive enough that it wouldn’t be legal to sell it as bottled water. (Which is too bad—it’d make a hell of an energy drink).
We know spent fuel pools can be safe to swim in because they’re routinely serviced by human divers.
However, these divers have to be careful.
On August 31st, 2010, a diver was servicing the spent fuel pool at the Leibstadt nuclear reactor in Switzerland. He spotted an unidentified length of tubing on the bottom of the pool and radioed his supervisor to ask what to do. He was told to put it in his tool basket, which he did. Due to bubble noise in the pool, he didn’t hear his radiation alarm.
When the tool basket was lifted from the water, the room’s radiation alarms went off. The basket was dropped back in the water and the diver left the pool. The diver’s dosimeter badges showed that he’d received a higher-than-normal whole-body dose, and the dose in his right hand was extremely high.
The object turned out to be protective tubing from a radiation monitor in the reactor core, made highly radioactive by neutron flux. It had been accidentally sheared off while a capsule was being closed in 2006. It sank to a remote corner of the pool floor, where it sat unnoticed for four years.
The tubing was so radioactive that if he’d tucked it into a tool belt or shoulder bag, where it sat close to his body, he could’ve been killed. As it was, the water protected him, and only his hand—a body part more resistant to radiation than the delicate internal organs—received a heavy dose.

So, as far as swimming safety goes, the bottom line is that you’d probably be ok, as long as you didn’t dive to the bottom or pick up anything strange.
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.”
Anonymous says FML
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Philip.paulssonOld people are awesome.
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jay ze punk says FML
Philip.paulssonYet another one that doesn't make sense as an FML to me at all.
Creeped out says FML
Philip.paulssonHow is this even remotely FML? Learn to take a compliment, fool!
Tesla Model S dubbed 'world's quickest production electronic vehicle' by NEDRA, runs 1/4 mile in 12 seconds
We already knew the Tesla Model S was fast, but not this fast. After dropping a 12.371 quarter mile this past weekend at the Palm Beach International Raceway in Florida (@ 110.84 MPH), the National Electric Drag Racing Association awarded the Tesla Model S its stamp of officiation for being "the quickest production vehicle" in quarter mile tests. That's not just on a single pass, mind you, but several quarter mile runs over the course of a day at the track. Each pass reaffirmed a 12-second average from the 416HP electric beast -- more than proficient for a 4,700-lb hulk of metal, and more than competitive against much lighter and more expensive beasts. And that's all without internal combustion, lest you forget -- the thing even gets 350 miles per charge. Drag Times attended the event and promises video in the coming days, but for now you can peep the quarter mile timeslips and read their rundown.
[Photo credit: Drag Times; Thanks Fred!]
Filed under: Transportation
Source: Drag Times, Drag Times (2)
Editorial Cartoon: Yawn Of The Dead
Philip.paulssonIs it some sort of running joke that the consistently funny Onion runs the least funny cartoons they can come up with? (and yes, I recognize the humor in choosing this particular cartoon to share with this opinion)
TheLastSerenade says FML
Philip.paulssonIs it weird that this made me excited for Game of Thrones?
Nation's Movie Theaters Bracing For 'Hansel And Gretel' Being Perhaps The Biggest Hit Of All Time
North Korea Claims New Long Range Missile Has Ability To Fly Right Up In The Air, Not Unlike A Bird Or A Fly
Slideshow: SLIDESHOW: 8 INSANELY CUTE Child Soldiers
Philip.paulssonI have mixed feelings about this. Which is probably the point.
Opinion: When You're Feeling Low, Just Remember I'll Be Dead In About 15 Or 20 Years (by Donald Trump)
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Zombieland TV show in the works at Amazon, headed for Instant
Before Jesse Eisenberg was known for playing Facebook's quirky founder, he starred with Woody Harrelson in a delightfully campy film called Zombieland. That film is apparently being adapted for the little screen -- well, perhaps not so little, but littler -- by none other than Amazon Studios, the in-house team created to produce original content on Amazon's Instant streaming service, reports Broadcast Now. It's not clear just how far along the series is, but io9 did discover some casting pages which reveal the plot: "the show will center around the original group of post apocalyptic survivors." Presumably that means more Twinkie references, more awkward romance, and a ton more comical zombie killing. That is, of course, if the early casting sheets are indicative of what the final show ends up being. Regardless, we've reached out to Amazon for more info, and we've dropped some of the film's best parts just below the break.
Filed under: Misc, Home Entertainment, HD, Amazon
Via: The Verge
Source: Broadcast Now, io9
lesson.learned says FML
In Stunning Change Of Character, Bill Belichick Adopts Half-Dozen Dogs From Humane Society
SimCity beta kicks off January 25th, feeds our city-building ambitions
While we can't speak for everyone, SimCity's urban construction triggers fond memories for more than one of us -- mostly the small thrills of building our first arcologies or getting statues in our honor. A chance to feed our nostalgia (and megalomania) is coming quickly with the advent of EA's beta for the SimCity reboot. Windows users who register before January 20th will get one hour's worth of game time to use between January 25th and 28th, along with an opportunity to provide feedback on bugs and play balancing. It's an almost cruel tease when we know we'll have to wait until the final version's March 5th launch to play more, or to play on a Mac, but we'll take the beta offer when many of us haven't seen a 'pure' SimCity game for a decade.
[Thanks, David]
Via: EA (Facebook)
Source: SimCity




