Two days ago, a truck carrying a container of radioactive cobalt-60 (enough to make a dirty bomb) was stolen by carjackers off a highway near Tijuana. Today, authorities found the truck. The thieves probably aren't terrorists
, just some guys who wanted a truck with a crane attached to it. But, at some point, they opened the container of cobalt-60 and will now almost certainly die from radiation exposure. Read the rest
The New York Times
has a story that ties together several reports of contaminated, radioactive water leaking
into the ground and the nearby harbor at the site of the Fukushima Daiichi power plant in Japan. From the sounds of things, this water has not yet heavily contaminated the open sea. That's the good news. The bad news is that everybody pretty much agrees that TEPCO has no idea what to do when it comes to actually stopping the leaks, and no clue how long they could continue. Read the rest
A trend towards drier, hotter summers in the forests around the abandoned nuclear power plant at Chernobyl has increased the riks of forest fires in the region
— which is a big deal, considering the fact that trees and plants in the area have absorbed some of the radioactive isotopes from the 1986 disaster. If they burn, more people will be exposed to airborne particles. It's a small fraction compared with the people exposed by the original Chernobyl power plant fire, but still dangerous. Read the rest
Recently, I linked you to a report on the World Health Organization's estimates of the long-term risk of cancer and cancer-related deaths
among people who lived nearest to the Fukushima nuclear plant when it went into meltdown and the people who worked to get the plant under control and into a cold shutdown. The good news was that those risks seem to be lower than the general public might have guessed, partly because the Japanese government did a good job of quickly getting people away from the area and not allowing potentially contaminated milk and meat to be consumed. The bad news: That one aspect isn't the whole story on Fukushima's legacy or the government's competency. Although the plant is in cold shutdown today, it still needs to be fully decommissioned and the site and surrounding countryside are in desperate need of cleanup and decontamination. That task, unfortunately, is likely to be far more difficult than anybody thought, with initial estimates of a 40-year cleanup now described as "a pipe dream"
. One key problem: The government cut funding to research that could have produced the kind of robots needed for this work, because it assumed that nobody would ever need them. Read the rest
The Van Allen Belts are donut-shaped rings of radioactive particles that encircle the Earth. They can damage satellites and pose a bit of a risk for human astronauts who venture outside our planet's protective magnetic field and into the regions of the belts. Back in high school, you probably learned that there were two of them. But, it turns out, under certain situations, this planet actually has three Van Allen Belts
. The story about this at Nature News, written by , is a joy to read. You really get a sense of how totally scientists' minds were blown by this discovery
. Read the rest
At Time, Bryan Walsh reports on two pieces of news coming out of the aftermath of the Fukushima nuclear disaster
. First, the World Health Organization has released estimates of the health effects on the plant's workers, the people who were involved in shutting it down, and the local residents who lived closest to the plant when it went into meltdown. These people will have an increased risk of leukemia, thyroid cancers, and cancer, in general. But the increase isn't as large as you might have feared. Walsh does a very good job of breaking down the statistics, here. The second bit of news is, unfortunately, not so good. In Germany, which decided to phase out nuclear power in the wake of Fukushima, coal power is on the rise. And it's rising faster than the increase in renewable energy. Read the rest
It may be a little late for folks on the East Coast to round up the necessary parts before the blizzard really hits, but this would be a fun trapped-in-the-house project. It's not cheap, but it does give you the opportunity to see how subatomic particles interact with one another in the privacy of your own home. In a post at Scientific American George Musser explains how he put his experiment together
. A follow-up promises to show you how to use it, and what he found when he did. Read the rest
In comic books, radiation exposure always leads to awesome superpowers. In reality, not so much. Except in the case of Cladosporium cladosporioides
, a fungus exposed to high doses of radiation during the Chernobyl nuclear meltdown. Not only did C. cladosporioides
survive it gained a superpower — the ability to "eat" radiation. Read the rest
This is the difference between low kinetic energy (top) and high kinetic energy (bottom), as illustrated in the 1956 Disney book Our Friend the Atom. It may be useful in visualizing some of the ideas presented in my recent feature on space radiation.
From Fresh Photons, a fantastic blog chock full of science pictures.
Via David Ng Read the rest
Space is full of radiation. It's impossible to escape. Imagine standing in the middle of a dust storm, with bits of gravel constantly swirling around you, whizzing by, pinging against your skin. That's what radiation is like in space. The problem is that, unlike a pebble or a speck of dirt, ionizing radiation doesn't bounce off human flesh. It goes right through, like a cannonball through the side of the building, leaving damage behind.
How a 19th-century fascination with x-rays turned deadly.
At Grist, Jess Zimmerman has an interesting piece about a lake near a notoriously leaky former Soviet nuclear research site, where the radiation level is so high that an hour on the beach can be enough to kill you.
You can’t really blame Lake Karachay for acting up — it comes from a really rough area. The lake is located within the Mayak Production Association, one of the largest — and leakiest — nuclear facilities in Russia. The Russian government kept Mayak entirely secret until 1990, and it spent that period of invisibility mainly having nuclear meltdowns and dumping waste into the river. By the time Mayak’s existence was officially acknowledged, there had been a 21 percent increase in cancer incidence, a 25 percent increase in birth defects, and a 41 percent increase in leukemia in the surrounding region of Chelyabinsk. The Techa river, which provided water to nearby villages, was so contaminated that up to 65 percent of locals fell ill with radiation sickness — which the doctors termed “special disease,” because as long as the facility was secret, they weren’t allowed to mention radiation in their diagnoses.
Read the rest at Grist Read the rest
In France, doctors and radiologists accused of overdosing hundreds of cancer patients, then destroying evidence to cover up their potentially lethal mistakes, are on trial for manslaughter. Out of a group of 24 patients who got up to 20% more radiation than they should have, seven patients died. "The errors were blamed on the radiation machines being upgraded with new ones and doses of radiation being miscalculated." More at the Guardian
. Read the rest
Science blogger Ed Yong whipped up this awesome graphic and made me a one-off tshirt to wear to radiation treatment for breast cancer.
Cancer patients, radiation oncologists, radiation therapists, and the people who love them all can make their own t-shirts and stickers with the JPEG if you are so inclined!
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A public info campaign in Japan compared radiation to a nagging wife. Apologies have been made. Reuters' Miki Kayaoka:
Read the rest
The Japanese Atomic Energy Agency devoted a page on its website to an effort to "make the hard words used in the nuclear power industry" more easy to understand, particularly for women. The page, which included a cartoon of an angry, fist-waving wife and her cowering husband, compared the wife's yell to radiation. It continued the metaphor by saying that the women's increasing agitation could be compared to "radioactivity", while claiming the wife herself was comparable to "radioactive material".
Science blogger Lee Falin has a potentially useful analogy for putting radiation dose and risk into perspective—treat it like currency. Part of the problem with explaining radiation is that there are multiple units of measurement in play and they're all unfamiliar to the average Joe and Jane. The numbers get confusing quickly and when numbers get confusing, most people just tune them out. "Blah blah blah blah radiation blah blah" is both an unhelpful message, and an often terrifying one.
Falin tries to get around that problem by putting radiation doses into a number system that everybody knows and uses every day—money. He starts by deciding arbitrarily that 1 sievert of exposure is worth $1000. Once you've got that established, it's easier to understand relative doses. In this system, getting $4000 all at once is a deadly dose. Most of us get $2.00-$3.00 a year in background radiation exposure. A mammogram is worth .40.
This is not a perfect method. In particular, it seems to work best for acute exposure. Falin still hasn't totally solved the problem of explaining the accumulation of radiation over time. But I think that this idea—thinking of radiation doses in terms of money—could go a long way to helping some people understand this stuff a little better. I really liked how he explained cancer risks, for instance:
Read the rest
What about the long term risk of cancer caused by radiation exposure? According to the EPA, an average of 2,000 out of every 10,000 adults will die from some form of cancer.