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  • It’s been six years since Fukushima, so based on their half lives: the iodine 131

  • has almost completely decayed and 88 percent of the cesium-134 has decayed, but the cesium-137

  • is only decayed about a fifth.

  • Yikes.

  • Up and atom friends, Trace here for DNews.

  • In case you are somehow unaware, Fukushima Daiichi is a nuclear power facility damaged

  • unexpectedly by a tsunami and earthquake.

  • Weve done some videos about it, and so have some of you.

  • I’ve watched them.

  • Fukushima is a touchy topic for some of you out there.

  • I know radiation can be scary, but just to quickly reiterate, if you don’t live in

  • the immediate area around the nuclear disaster, youre fine.

  • But there’s news, y’all!

  • In 2011, the radiation levels in Reactor 2 were 73 sieverts per hour, that’s pretty

  • high -- but the latest reading says 530 per hour (with a 30-percent error margin).

  • For reference, depending on the organ dosed with radiation, 1 sievert can cause illness,

  • 3 to 4 sieverts can be fatal in 30 days, 80 can cause coma and death within one hour,

  • and 100 can cause instant death.

  • So 530 is a lot.

  • Like.

  • A LOT.

  • But it’s all inside the reactor.

  • That’s ridiculous.

  • The increase could have happened slowly over the last six years, as this is the first time

  • since just after the meltdown scientists were actually able to sample the radiation.

  • Fascinatingly, the National Institute of Radiological Sciences told Japan Times they’d never even

  • considered working with radiation this high, which is scary.

  • Now that the cleanup crews finally have access to Reactor 2, they think they might be able

  • to start removing the nuclear material by 2021, some say later.

  • And, in case you fell victim to a fake news story going around: no the reactors are not

  • collapsing into the ocean.

  • That said, it’s still a mess.

  • This is a unique situation.

  • I mean, weve already learned a lot about radiation from this disaster!

  • For example, a report published in the Annual Review of Marine Science found radiation levels

  • in the ocean (except directly around the plant) aredecreasing rapidly.”

  • Radiation on the seabed in the harbor is higher than normal, but less than in 2011.

  • Overall, off the coast of North America upper ocean levels might be 2 to 3 times the nuclear

  • test levels seen in the 1960s, the study found.

  • That would peak in 2015-16 and then drop.

  • Another said the radioactivity levels wererapidly returning to normal,” as of 2015.

  • Even the dose from the seabed is less than the amount of radiation we get from natural

  • sources annually -- less than the radiation someone gets on a flight from New York to

  • Japan.

  • They specifically said the risk to humans is very low.

  • And if youre worried about fish… a study in Integrated Environmental Assessment and

  • Management found the biggest worry is for bottom-feeders, and those that eat them.

  • Tuna, for example, while slightly more radioactive, are still safe to eat (not to mention, delicious).

  • Overall radioactivity is variable, and the fish we eat are required to be tested before

  • theyre on sent to consumers.

  • Basically, as weve said before, Fukushima is and was a disaster, but like any disaster,

  • there’s a lot to learn, and if you don’t live near the actual plant, youre not going

  • to experience any more radiation than you’d get from natural sources.

  • In fact, a study in the Journal of Radiological Protection found even people from Fukushima

  • have been exposed to four times less radiation than the Japanese government thought they

  • would, in part because people weren’t spending a lot of time outside.

  • They didn’t plan for this, but we can get better because of it.

  • Another Fukushima could happen.

  • Someone will have to invent, innovate and engineer our way out of this mess and predict

  • and prepare for the next one.

  • Even the cows in Fukushima have been studied!

  • Theyre experiencing 15 times normal radiation, but have no fertility or organ issues.

  • This is the first time scientists have studied livestock in low-dose radiation, so there’s

  • a lot to learn.

  • It’s super interesting!

  • In late 2016, the government estimated 70 percent of the 150,000 people evacuated six

  • years ago will get to return home, and yet, the topsoil and a lot of tree bark has stripped

  • after absorbing radioactive fallout, buildings were destroyed, some of the groundwater is

  • contaminated, and the power plant will still be nearby as cleanup progresses for the next

  • half-century -- it’s assumed to cost nearly 190 billion dollars.

  • You really can never go home again.

  • Want to know more about Fukushima if the radiation is affecting the west coast of the U.S.? Watch

  • this video.

  • How do you feel about this?

  • Should keep using nuclear power?

  • Why or why not?

  • Let us know in the comments, make sure you subscribe so you get more DNews and thanks

  • for tuning in.

It’s been six years since Fukushima, so based on their half lives: the iodine 131


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B1 中級

インターネットは福島の放射能について過剰反応しているが、その理由はここにある (The Internet Is Overreacting About Fukushima's Radiation, Here's Why)

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    李柏毅 に公開 2021 年 01 月 14 日