News.com.au 23rd Feb 2019 ,Eerie photographs taken recently show how nature is reclaiming an abandoned
town 33 years after the nuclear disaster at Chernobyl. The harrowing
pictures show what is left of the towns of Chernobyl and Pripyat in
Ukraine, with gasmasks scattered about and dolls left abandoned in a day
care centre. Other captivating photos show an abandoned supermarket with a
shopping trolley outside and a rusting bumper car. Dutch photographer Erwin
Zwaan, 47, travelled to the 28-kilometre exclusion zone around Chernobyl in
Northern Ukraine in 2016 and 2018 to photograph the ghostly ruins for his
book Chernobyl – 30+ Years Without Humans. The power plant and nearby town
Pripyat — once home to 50,000 people — remain more or less untouched
three decades after they were evacuated in 1986.
The 1986 Chernobyl accident resulted in one of the highest unintentional releases of radioactivity in history. The graphite moderator of reactor 4 was exposed to air and ignited, shooting plumes of radioactive fallout across what is now Belarus, Ukraine, Russia, and Europe. While few people live near Chernobyl now, animals living in the vicinity of the accident allow us to study the effects of radiation and gauge recovery from the disaster.
Most domestic animals have moved away from the accident, and those deformed farm animals that were born did not reproduce. After the first few years following the accident, scientists focused on studies of wild animals and pets that had been left behind, in order to learn about Chernobyl’s impact.
Although the Chernobyl accident can’t be compared to effects from a nuclear bombbecause the isotopes released by the reactor differ from those produced by a nuclear weapon, both accidents and bombs cause mutations and cancer.
It’s crucial to study the effects of the disaster to help people understand the serious and long-lasting consequences of nuclear releases. Moreover, understanding the effects of Chernobyl may help humanity react to other nuclear power plant accidents.
The Relationship Between Radioisotopes and Mutations
You may wonder how, exactly, radioisotopes (a radioactive isotope) and mutations are connected. The energy from radiation can damage or break DNA molecules. If the damage is severe enough, cells can’t replicate and the organism dies. Sometimes DNA can’t be repaired, producing a mutation. Mutated DNA may result in tumors and affect an animal’s ability to reproduce. If a mutation occurs in gametes, it can result in a nonviable embryo or one with birth defects.
Additionally, some radioisotopes are both toxic and radioactive. The chemical effects of the isotopes also impact the health and reproduction of affected species.
The types of isotopes around Chernobyl change over time as elements undergo radioactive decay. Cesium-137 and iodine-131 are isotopes that accumulate in the food chain and produce most of the radiation exposure to people and animals in the affected zone.
Examples of Domestic Genetic Deformities
Ranchers noticed an increase in genetic abnormalities in farm animals immediately following the Chernobyl accident. In 1989 and 1990, the number of deformities spiked again, possibly as a result of radiation released from the sarcophagus intended to isolate the nuclear core. In 1990, around 400 deformed animals were born. Most deformities were so severe the animals only lived a few hours.
Examples of defects included facial malformations, extra appendages, abnormal coloring, and reduced size. Domestic animal mutations were most common in cattle and pigs. Also, cows exposed to fallout and fed radioactive feed produced radioactive milk.
The health and reproduction of animals near Chernobyl were diminished for at least the first six months following the accident. Since that time, plants and animals have rebounded and largely reclaimed the region. Scientists collect information about the animals by sampling radioactive dung and soil and watching animals using camera traps.
The Chernobyl exclusion zone is a mostly-off-limits area covering over 1,600 square miles around the accident. The exclusion zone is a sort of radioactive wildlife refuge. The animals are radioactive because they eat radioactive food, so they may produce fewer young and bear mutated progeny. Even so, some populations have grown. Ironically, the damaging effects of radiation inside the zone may be less than the threat posed by humans outside of it. Examples of animals seen within the zone include Przewalksi’s horses, wolves, badgers, swans, moose, elk, turtles, deer, foxes, beavers, boars, bison, mink, hares, otters, lynx, eagles, rodents, storks, bats, and owls.
Not all animals fare well in the exclusion zone. Invertebrate populations (including bees, butterflies, spiders, grasshoppers, and dragonflies) in particular have diminished. This is likely because the animals lay eggs in the top layer of soil, which contains high levels of radioactivity.
Radionuclides in water have settled into the sediment in lakes. Aquatic organisms are contaminated and face ongoing genetic instability. Affected species include frogs, fish, crustaceans, and insect larvae.
While birds abound in the exclusion zone, they are examples of animals that still face problems from radiation exposure. A study of barn swallows from 1991 to 2006 indicated birds in the exclusion zone displayed more abnormalities than birds from a control sample, including deformed beaks, albinistic feathers, bent tail feathers, and deformed air sacs. Birds in the exclusion zone had less reproductive success. Chernobyl birds (and also mammals) often had smaller brains, malformed sperm, and cataracts.
The Famous Puppies of Chernobyl
Not all of the animals living around Chernobyl are entirely wild. There are around 900 stray dogs, mostly descended from those left behind when people evacuated the area. Veterinarians, radiation experts, and volunteers from a group called The Dogs of Chernobyl capture the dogs, vaccinate them against diseases, and tag them. In addition to tags, some dogs are fitted with radiation detector collars. The dogs offer a way to map radiation across the exclusion zone and study the ongoing effects of the accident. While scientists generally can’t get a close look at individual wild animals in the exclusion zone, they can monitor the dogs closely. The dogs are, of course, radioactive. Visitors to the area are advised to avoid petting the pooches to minimize radiation exposure.
References
Galván, Ismael; Bonisoli-Alquati, Andrea; Jenkinson, Shanna; Ghanem, Ghanem; Wakamatsu, Kazumasa; Mousseau, Timothy A.; Møller, Anders P. (2014-12-01). “Chronic exposure to low-dose radiation at Chernobyl favours adaptation to oxidative stress in birds”. Functional Ecology. 28 (6): 1387–1403.
Moeller, A. P.; Mousseau, T. A. (2009). “Reduced abundance of insects and spiders linked to radiation at Chernobyl 20 years after the accident”. Biology Letters. 5 (3): 356–9.
Møller, Anders Pape; Bonisoli-Alquati, Andea; Rudolfsen, Geir; Mousseau, Timothy A. (2011). Brembs, Björn, ed. “Chernobyl Birds Have Smaller Brains”. PLoS ONE. 6 (2): e16862.
Poiarkov, V.A.; Nazarov, A.N.; Kaletnik, N.N. (1995). “Post-Chernobyl radiomonitoring of Ukrainian forest ecosystems”. Journal of Environmental Radioactivity. 26 (3): 259–271.
Smith, J.T. (23 February 2008). “Is Chernobyl radiation really causing negative individual and population-level effects on barn swallows?”. Biology Letters. The Royal Society Publishing. 4 (1): 63–64.
Wood, Mike; Beresford, Nick (2016). “The wildlife of Chernobyl: 30 years without man”. The Biologist. London,UK: Royal Society of Biology. 63 (2): 16–19.
THE MELTDOWN AT the Chernobyl Nuclear Power Plant in northern Ukraine on April 26, 1986 was a massive tragedy that ultimately claimed at least 9,000 lives and affected millions more. It also created a toxic mess. Radioactive particles choked the atmosphere and rained down on cities, forests, and roads. In the immediate aftermath, fires had to be put out, debris cleared, contaminated waste buried deep underground.It was, obviously, not an easy task. Remote-controlled bulldozers and other robots proved too weak for the job, their circuitry fried by radiation. So the Soviet Union sent in humans—600,000 of them. These brave firefighters, soldiers, janitors, and miners—the so-called “liquidators”—did everything from hosing down streets to felling trees to building a concrete sarcophagus around the exposed reactor … all the while charged subatomic particles ravaged their cells and shortened their life spans.
“No personal sacrifice was too much for these men and women,” says photographer Tom Skipp. Moved by their story, he visited Slavutych, Ukraine in April to photograph survivors, now in their golden years. The portraits make up his haunting series The Liquidators.
“The liquidators were sent into impossible scenarios where even machines failed,” Skipp says. “Each has a human story seemingly entangled in the complex history of communism and duty to the motherland….
On average, the liquidators were exposed to 120 millisieverts of radiation, about 1,200 times the amount you get from a simple x-ray. In the years following the meltdown, more than 4,000 of them died from radiation-caused cancers, and another 70,000 were disabled by exposure. Still, the liquidators shared a steadfast sense of duty to their government and fellow citizens, even when they didn’t agree with the ruling system or found it difficult to talk about. “I think that there’s a certain amount of fear aligned with speaking out against any wrongdoings that were committed,” Skipp says. “Many live on a state pension.”
Skipp photographed the men and women with his Fujifilm GFX 50 in their homes, as well as at at a local museum dedicated to explaining the history of Chernobyl and Slavutych. Many of the portraits capture them standing proudly but solemnly before an image of the destroyed reactor and beneath a clock stopped at the exact time of the meltdown—the moment that defined their lives forever. https://www.wired.com/story/chernobyl-liquidators-photo-gallery/
Morning Star 27th June 2018,A PIONEERING new report argues that thousands more engineering jobs could
be created by stopping the renewal of the Trident missiles system. The
report, Defence Diversification: International Learning for Trident Jobs,
was published today by the Nuclear Education Trust.
A major wildfire is sweeping through the Chernobyl nuclear disaster area. The authorities have deployed dozens of fire trucks as firefighting aircraft bombard the radioactive exclusion zone with massive amounts of water.
The fire inside the Chernobyl ‘dead zone,’ which is now part of Ukraine, started on Tuesday morning, when dry grass was ignited, local emergency services said in a statement. The wildfire subsequently reached a forest, where up to 10 hectares (24 acres) are now in flames.
Some 29 vehicles and 126 personnel have been dispatched at the scene, with several planes and helicopters dropping water from the sky on the area engulfed by wildfire.
The zone saw another large blaze last year, which scorched 25 hectares (60 acres) of land.
Chernobyl became the site of one of the biggest nuclear disasters in history, when a local power reactor blew up in 1986, leading to massive contamination of the surrounding area. The severely damaged reactor was sealed off by a protective ‘sarcophagus’ of steel and concrete, while the nearby town of Pripyat had its 50,000 population evacuated. Today, Pripayt is a ghost town. The so-called ‘exclusion zone’ was imposed around the site of the disaster, banning visitors.
Current winds are not blowing residual pollution towards the country’s capital Kiev, local authorities said, noting that radiation levels remain normal.
Radio Free Europe 6th June 2018, Scientists have been concerned for decades about potentially catastrophic wildfires inside the exclusion zone around the defunct Chernobyl nuclear power plant in Ukraine — the site in 1986 of the world’s worst nuclear accident.
That’s because trees and brush in the zone have absorbed radioactive particles that can be released into the air by the smoke of a wildfire.
Not surprisingly, some experts are skeptical about Ukrainian Prime Minister Volodymyr Hroysman’s claim on Facebook that “there’s no need to worry” about a June 5 blaze that raced through the so-called Red Forest — one of the most contaminated patches of forest near Chernobyl. https://www.rferl.org/a/prime-minister-says-don-t-worry-but-scientists-concerned-about-chernobyl-wildfires/29276072.html
Milk in parts of Ukraine has radioactivity levels up to five times over the country’s official safe limit, new research shows.
Scientists from the Greenpeace Research Laboratories at the University of Exeter and the Ukrainian Institute of Agricultural Radiology sampled cow’s milk from private farms and homes in the Rivne region, about 200km from the site of the Chernobyl Nuclear Power Plant explosion in 1986. They found levels of radioactive caesium in milk above Ukraine’s safe limit for adults of 100 Becquerel per litre (Bq/L) at six of 14 settlements studied, and above the children’s limit of 40 Bq/L at eight sites.
The highest levels found were about 500 Bq/L – five times over the limit for adults and more than 12 times that for children.
“More than 30 years after the Chernobyl disaster, people are still routinely exposed to radioactive caesium when consuming locally produced staple foods, including milk, in Chernobyl-affected areas of Ukraine,” said Dr Iryna Labunska, of Greenpeace Research Laboratories at the University of Exeter.
“Many people in the area we studied keep cows for milk, and children are the main consumers of that milk.
“Though the level of soil contamination in the studied areas is not extremely high, radioactive caesium continues to accumulate in milk and other foods, such that the residents of these villages are chronically exposed to radioactivity that presents health risks to almost every system in the body – especially among children.”
The researchers say that some simple protective measures could be taken to bring radiation exposure levels below limits at a cost of less than 10 euros per person per year for the 8,300 people living in the six villages with the highest contamination.
Such measures include applying a caesium binder, called Ferrocyn, to cows, mineral fertilisation of potato fields and feeding pigs with uncontaminated fodder.
The cost of this would decrease each year as radiation levels fall – but if no action is taken, the experts warn that milk contamination will continue to exceed the 100?Bq/L adult limit in parts of Ukraine until at least 2040.
“The Ukrainian government has taken some of these measures in the past, but that stopped in 2009,” Dr Labunska said.
“Government and international monitoring needs to take place, along with help for people affected by this radiation.
“This situation should also act as a warning and a reminder of just how long the legacy of nuclear accidents can be.
“Without adequate countermeasures, what may now seem a purely historical event will remain a daily reality for those communities most impacted.”
When Timothy Mousseau, a researcher with the University of South Carolina, started visiting Ukraine nearly 20 years ago, he studied birds, insects and plants, “basically anything we could catch.” It was an excuse to go somewhere unusual and study something unconventional: How creatures large and small deal with exposure to nuclear radiation.
But as humans’ interaction with radiation grows more common, Mousseau has found the need for this kind of research has grown. This summer, the USC evolutionary biologist is shifting his focus to canines. And he will be bringing a group of pre-veterinary students with him.
The Chernobyl nuclear power plant was constructed during the 1970s in Ukraine. More than 32 years ago, one of the Chernobyl plant’s reactors exploded, causing “the largest peacetime nuclear disaster in history,” according to a report by The Guardian. The nearby town of Prypiat has remained uninhabited.
Although there are few people in the area, dogs left behind after the disaster bred, and today there are about 250 strays roaming the area, according to the Clean Futures Fund, a nonprofit aid group that is working to bring veterinarians to the site to vaccinate the dogs for rabies, as well as to spay and neuter them.
The USC team is also partnering with the Clean Futures Fund in their research.
The researchers, led by Mousseau, will be examining the animals for signs of tumors. The animals will be sedated, Mousseau said. They also will look for signs of eye cataracts, another sign of radiation poisoning, he said.
The students will be tasked with looking for changes in the animals’ genetics and microbiome. The dogs will also be outfitted with meters.
“What we’re really hoping to get at is a better idea of how much radiation it takes to cause significant genetic damage,” Mousseau said.
Mousseau is no stranger to media attention. His work has been featured in The New York Times, NBC and most recently, National Geographic. He breezes through an interview with ease. He said especially following the Fukushima disaster in Japan, there has been heightened interest in the effects of radiation on creatures.
Not to mention that radiation is creeping into Americans’ daily life, he said. He said the average dose Americans receive each year has more than doubled in the last 20 years. And more exposure could be on the horizon: A handful of companies are working to make commercial space travel happen.
In the medical field, diagnostic tools such as CT scans and portable devices used in a dentist’s office emit radiation. Then there is the radiation used to treat cancer, and it also has uses in medical research, according to the United States Nuclear Regulatory Commission.
CT scans can produce a little less than the same amount of radiation as the lowest doses seen in Japanese atomic bomb survivors, according to the Food & Drug Administration. Still, the FDA states a typical CT scan’s risk for causing cancer is “very small.”
All “nuclear materials” in medicine are regulated. But Mousseau said more research needs to be done to understand the body’s response to even tiny amounts of radiation. He thinks the dogs, with their naturally shorter life spans, will make for good test subjects.
“You can see the effects in a shorter period of time,” Mousseau said. “We can look at consequences much more quickly.”
The canines, with their lifetime exposure to radiation, make for desirable research subjects. But the researchers plan to help take care of the dogs, too, by monitoring their health.
Courtney Rulison, 21, said she found out about the opportunity when fliers were passed around to USC biology students.
Rulison, who aspires to become a veterinarian, explained she will help prepare the animals for spaying and neutering. She said she was picked because of her interest and expertise in the animals.
“I don’t know how long it’s going to take for this volunteer organization not to be needed anymore,” she said. “Or if these dogs can ever be adopted or leave Chernobyl. For right now, they have to stay there because they’re contaminated.”
Reach Mary Katherine Wildeman at 843-937-5594. Follow her on Twitter @mkwildeman.
FT 15th May 2018 ,I wish I had known Serhii Plokhy was writing this book. I would have told
him why the Chernobyl disaster is an indelible part of my life. When the
nuclear plant’s fourth reactor exploded in the early hours of Saturday,
April 26 1986, I was 130km away in Kiev. A Moscow-based reporter for
Reuters news agency, I was spending the weekend in the Ukrainian capital
with a friend who taught at Kiev university under a British Council
programme.
Like almost all the city’s 2.5m residents, we knew nothing about
the accident, the world’s worst nuclear disaster. Until the evening of
Monday April 28, the Kremlin held to its unforgivable decision to keep
Soviet citizens and the world in complete darkness. All that time,
radiation was spreading far beyond the stricken reactor. For the first few
days, the strongest winds blew to the north-west, so anyone in Kiev – which
is south of Chernobyl – got off relatively lightly.
However, when I returned to Moscow and underwent a radiation check at the US embassy, the
Geiger counter went beep-beep-beep, registering abnormal levels on my
clothes. Before my eyes an embassy official tossed my jeans into an
incinerator. Plokhy, a Harvard professor of Ukrainian background, is
ideally placed to tell the harrowing story of Chernobyl. He is the first
western-based historian to make extensive use of Chernobyl-related material
in Communist party, government and, especially, KGB security police
archives that became available after Ukraine’s 2014 pro-democracy
revolution. https://www.ft.com/content/f7101e6a-4eeb-11e8-9471-a083af05aea7
Guardian 9th May 2018 Chernobyl: History of a Tragedy by Serhii Plokhy review – Europe nearly
became uninhabitable. A compelling history of the 1986 disaster and its
aftermath presents Chernobyl as a terrifying emblem of the terminal decline
of the Soviet system. The turbine test that went catastrophically wrong was
not, he argues, a freak occurrence but a disaster waiting to happen. It had
deep roots in the party’s reckless obsession with production targets and
in the pliant nuclear industry’s alarming record of cutting corners to
cut costs. https://www.theguardian.com/books/2018/may/09/chernobyl-history-tragedy-serhii-plokhy-review-disaster-europe-soviet-system
Reuters 3rd May 2018 , French uranium mining and nuclear fuel group Orano, formerly called Areva,
said it had signed a fuel reprocessing deal with Ukraine. Orano and the
Ukrainian utility EnergoAtom signed a contract for assessing the
feasibility of reprocessing services of spent fuel assemblies of Ukrainian
VVER-1000 nuclear reactors in Orano la Hague facility Orano said the
contract, signed in the presence of Oleksander Shavlakov, First
Vice-President of EnergoAtom and Pascal Aubret, Senior Executive Vice
President of Orano’s Recycling Business Unit, marks a new step towards
the treatment of Ukrainian used fuels VVER 1000 at the Orano la Hague site. https://af.reuters.com/article/commoditiesNews/idAFFWN1SA18N
Wild boars in Europe, parts of the former Soviet Union and Japan are too radioactive to be safe for human consumption. That sounds like good news for the boars. But only partly so.
The boars are radioactively contaminated due to fallout from the April 26, 1986 Chernobyl, Ukraine nuclear power plant explosion. They were vulnerable because they love mushrooms and truffles. These fungi absorbed the cesium-137 fallout released by the Chernobyl nuclear explosion.
Because they lack stems and roots, mushrooms and other fungi use absorption to obtain nutrition from the atmosphere through their surface cells. As a result, they are prone to absorbing radioactive substances such as cesium-137 and other radionuclides.
When the boars eat the mushrooms and truffles, that radioactive contamination moves up the food chain. The mushrooms are also too radioactive for human consumption.
Consequently, hunters in Saxony, Germany, 700 miles from Chernobyl, still have to have any boar they kill tested first for radioactivity.
Hunters in Sweden are equally wary of killing and eating wild boar, which have been found to be 10 times more radioactive than the “acceptable” (but, as always, not “safe”) limits for consumption.
Wild boars have of course been affected in Japan as well, since the 2011 Fukushima disaster. Apart from roaming at will through the deserted prefecture — where they have even been observed entering and occupying abandoned houses — these animals also carry cesium contamination. However, one study at least has shown that their cesium levels are significantly lower than those of boars affected by Chernobyl fallout.
The unsuitability of wild boars for human consumption resulting from Chernobyl may sound like a win for boars and the vegetarian cause. But this radioactive contamination may come at a price. To date, studies of wildlife in the Chernobyl and Fukushima zones have shown that even if numbers of animals appear to have increased due to the absence of human predators, the health of these species contaminated with radiation has been seriously compromised.
Birds, mice and insects have demonstrated low to zero sperm counts, a tendency to tumors and cataracts, smaller brains, and shorter lifespans. Examination of muscle tissue and bone marrow in Macaque monkeys living in the contaminated areas of Fukushima yielded ominous signs. The monkeys had significantly low white and red blood cell counts as well as a reduced growth rate for body weight and smaller head sizes. The bone marrows of these monkeys were found to be producing almost no blood cells. Instead, the bone marrow has turned almost entirely into white-looking fat.
So far, Europe’s wild boar seem to have been evaluated only in relation to their contribution as a food source. Missing from the studies is what might be happening to the health of the boars themselves, and the implications for future generations of these animals.
“Gleaning the contamination levels of boars once they are killed is not enough,” says Cindy Folkers, radiation and health specialist at Beyond Nuclear, who looked at published studies on boars and radioactivity. “There is no history of their contamination level or any comparison to any damage they may have suffered. The genes could tell us that, but it appears no one is looking.”
Such changes, especially to DNA, can take many years and several generations to manifest as disease. But if negative outcomes do occur, this could signal a decline in the species, with repercussions for other animals along the food chain as well.
“Wild boars are one of the biomagnifiers of radioactivity in the environment,” added Folkers. “They dig in soil that might be slightly contaminated with cesium, inhaling and ingesting it, and foraging for mushrooms, which they then ingest. They are part of the ecosystem that keeps the cesium circulating.”
Since the 1986 nuclear disaster at the Soviet Chernobyl reactor, one in four thyroid cancer cases has been caused by radiation in the region, UN scientists report in their first such estimate.
After reviewing various statistics and existing studies, the Vienna-based UN Scientific Committee on the Effects of Atomic Radiation said around 20,000 such cancers were registered between 1991 and 2015 in the area surrounding the reactor, which takes in all of Ukraine and Belarus, as well parts of Russia.
This figure covers people who were younger than 18 years at the time of the nuclear accident.
“Thyroid cancer is a major problem after the Chernobyl accident and needs further investigation to better understand the long-term consequences,” UNSCEAR chairman Hans Vanmarcke said in a statement on Wednesday.
Based on limited data covering only the 1991-2005 period, UNSCEAR had previously put the total number of registered thyroid cancers in the region at 7000, but had not estimated the share that can be linked to radiation exposure.
The overall number of cases has increased nearly threefold to 20,000, not only because of radiation effects, but also because the group of people being monitored has been getting older, which has increased their natural risk of getting cancer.
In addition, the high awareness about thyroid cancer in the region and improved diagnostic methods have allowed doctors to detect a higher number of cases, UNSCEAR says in its paper.
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