Chernobyl’s “liquidators” suffered acute, and long-term health effects
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How Did Radiation Affect the ‘Liquidators’ of the Chernobyl Nuclear Meltdown? https://www.livescience.com/65563-chernobyl-radiation-effects-body.html These liquidators, who worked between 1987 and 1990, were exposed to high levels of radiation, on average around 120 millisievert (mSv), according to the World Health Organization. That’s over a thousand times more powerful than a typical chest X-ray, which delivers 0.1 mSv of radiation. And some of the very first responders were exposed to levels astronomically higher than that. So, what happens to the human body when exposed to such high levels of radiation? [5 Weird Things You Didn’t Know About Chernobyl] It’s like walking into a giant, powerful X-ray machine shooting radiation everywhere, said Dr. Lewis Nelson, chairman of emergency medicine at Rutgers New Jersey Medical School. Except, in this case, most of the radiation consisted of an even more damaging type of radiation than X-rays, called gamma-rays. This radiation, as it passes through the body, is ionizing. This means that it removes electrons from atoms in the body’s molecules, breaking chemical bonds and damaging tissues. Very high levels of ionizing radiation cause “radiation sickness.” At Chernobyl, 134 liquidators quickly developed radiation sickness, and 28 of them died from it. These people were exposed to radiation levels as high as 8,000 to 16,000 mSv, or the equivalent of 80,000 to 160,000 chest X-rays, according to the World Health Organization. Radiation sickness mostly manifests in the gastrointestinal tract and the bone marrow, Nelson said. Those areas have rapidly dividing cells, which means that instead of being tightly coiled and a little more protected, the DNA is unraveled so that it can be copied. That makes it more susceptible to the radiation (this is also why radiation therapy works to target cancer cells, which also rapidly divide). Within a couple of hours of the exposure, people with radiation sickness develop symptoms such as diarrhea and vomiting, Nelson said. When cells cannot properly divide, the mucosa or tissue lining of the GI tract also break downs, releasing cells and the bacteria that live in the gut (including in the stool) into the bloodstream. This would make even a healthy person sick, Nelson said. But because the radiation is also stopping the bone marrow from producing infection-fighting white blood cells, the body can’t fight those infections. People who have radiation sickness therefore have a weakened immune systemand frequently die of blood poisoning, or sepsis, within a couple of days, he said. High levels of radiation can also cause burns and blisters on the skin, which show up minutes to a few hours after the exposure and look just like a sunburn, Nelson said. While the GI-tract symptoms and burns happen almost immediately to a couple of hours after exposure to the radiation, the bone marrow survives for a couple of days. This means there is a latency period, when the person might even seem to improve, before showing symptoms of sepsis. The people who survived radiation sickness from Chernobyl took years to recover, and many of them developed cataracts because the radiation damaged the eye lenses, according to the World Health Organization. Lower exposuresBut much of the health focus around Chernobyl survivors has focused on the long-term consequences of the radiation exposure in these areas. The main consequence, for them, is an elevated risk of cancer. “But remember, the cancer risk is something you see 10 years down the road, so you have to live for 10 more years in order to see [that],” Nelson said. So the cancer risk is generally more of a concern for those who survived Chernobyl but were exposed to lower levels of radiation. The data on this risk is murky, with very approximate numbers, but it is estimated that 270,000 people in the Ukraine, Russia and Belarus who wouldn’t have otherwise developed cancers did develop these illnesses. This mainly manifested as thyroid cancer, directly caused by radioactive particles of iodine-131 released by the explosion. The thyroid needs iodine in order to produce hormones that regulate our metabolism. But if it doesn’t have enough of the healthy, nonradioactive iodine found in many foods, it absorbs the radioactive iodine, and this can eventually lead to thyroid cancer. This is why in the HBO series “Chernobyl,” people take iodine pills; filling those stores of iodine in the thyroid prevents it from absorbing the radioactive iodine. These radioactive particles, which also include others such as cesium-137 enter the body through contact with the skin or through the mouth and nose. In Chernobyl, these particles were thrown into the air, carried by winds and later fell back down in surrounding areas, contaminated crops and water, and the people who ate them. |
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Misleading and dangerous – the downplaying of Chernobyl’s radiation risks
 Downplaying the danger of Chernobyl https://www.theguardian.com/environment/2019/may/26/downplaying-the-danger-of-chernobyl
A travel article on a wildlife trip to the Chernobyl disaster zone failed to highlight the continuing radiation threat to people, animals and plants, write David Lowry and Ian Fairlie
Tom Allan’s report of his holiday inside the Chernobyl exclusion zone (Nuclear reaction, Travel, 25 May) was both misleading and dangerous in its assertions. He gives the impression that the radiation dangers are minimal: “less radiation risk than on a single transatlantic flight”, according to his ornithologist Belarusian guide, Valery Yurko. The problem around Chernobyl is not average radiation exposure but the millions of highly radioactive hotspots of radioactive particles spewed from inside the destroyed Chernobyl reactor core. The entire exclusion zone area has suffered from serious forest fires in the 33 years since the catastrophe, re-suspending these hot particles into the atmosphere and spreading them around.
Mr Allan also inaccurately asserts “so far, the effect of radiation on the animal populations has not been visible”. I suggest he consult the extensive academic research of Professor Tim Mousseau of the department of biological sciences at the University of South Carolina, and his international colleagues, where he will find extensively set out the crippling effect of the radioactive contamination on both flora and fauna. • Tom Allan is poorly informed about the risks of radiation. The external radiation he received may be low, but what about the radioactivity he inhaled? Internal radiation is far more serious than external radiation, as his lungs are likely still being irradiated from the radioisotopes he breathed in during his short visit. |
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Comparing the radioactive pollution from Fukushima and Chernobyl nuclear accidents
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Chernobyl vs. Fukushima: Which Nuclear Meltdown Was the Bigger Disaster? Live Science By | May 24, 2019 The new HBO series “Chernobyl” dramatizes the accident and horrific aftermath of a nuclear meltdown that rocked the Ukraine in 1986. Twenty-five years later, another nuclear catastrophe would unfold in Japan, after the magnitude 9.0 Tohoku earthquake and subsequent tsunami triggered a disastrous system failure at Fukushima Daiichi Nuclear Power Plant.Both of these accidents released radiation; their impacts were far-reaching and long-lasting. But how do the circumstances of Chernobyl and Fukushima compare to each other, and which event caused more damage? [5 Weird Things You Didn’t Know About Chernobyl] Only one reactor exploded at Chernobyl, while three reactors experienced meltdowns at Fukushima. Yet the accident at Chernobyl was far more dangerous, as damage to the reactor core unspooled very rapidly and violently, said Edwin Lyman, a senior scientist and acting director for the Union of Concerned Scientists Nuclear Safety Project. “As a result, more fission products were released from the single Chernobyl core,” Lyman told Live Science. “At Fukushima the cores overheated and melted but did not experience violent dispersal, so a much smaller amount of plutonium was released.” In both accidents, radioactive iodine-131 posed the most immediate threat, but with a half-life of eight days, meaning half of the radioactive material decayed within that time, its effects soon dissipated. In both meltdowns, the long-term hazards arose primarily from strontium-90 and cesium-137, radioactive isotopes with half-lives of 30 years. And Chernobyl released far more cesium-137 than Fukushima did, according to Lyman. “About 25 petabecquerels (PBq) of cesium-137 was released to the environment from the three damaged Fukushima reactors, compared to an estimate of 85 PBq for Chernobyl,” he said (PBq is a unit for measuring radioactivity that shows the decay of nuclei per second). What’s more, Chernobyl’s raging inferno created a towering plume of radioactivity that dispersed more widely than the radioactivity released by Fukushima, Lyman added. Sickness, cancer and deathAt Chernobyl, two plant workers were killed by the initial explosion and 29 more workers died from radiation poisoning over the next three months, Time reported in 2018. Many of those who died had knowingly exposed themselves to deadly radiation as they worked to secure the plant and prevent further leaks. Government officials relocated an estimated 200,000 people from the region, according to the International Atomic Energy Agency. In the years that followed, cancers in children skyrocketed in the Ukraine, up by more than 90%, according to Time. A report issued by United Nations agencies in 2005 approximated that 4,000 people could eventually die of radiation exposure from Chernobyl. Greenpeace International estimated, in 2006, that the number of fatalities in the Ukraine, Russia and Belarus could be as high as 93,000 people, with 270,000 people in those countries developing cancers who otherwise would not have done so…….. The extent of Fukushima’s environmental impact is still unknown, though there is already some evidence that genetic mutations are on the rise in butterflies from the Fukushima area, producing deformations in their wings, legs and eyes. [See Photos of Fukushima’s Deformed Butterflies] ……. radiation levels around Chernobyl can vary widely. Aerial drone surveys revealed in May that radiation in Ukraine’s Red Forest was concentrated in previously unknown “hotspots,” which scientists outlined in the region’s most accurate radiation maps to date. The Fukushima nuclear power plant is still open and active (though the reactors that exploded remain closed); nonetheless, ongoing concerns about safety linger. The Tokyo Electric Power Company (TEPCO) recently announced that it would not hire foreign workers coming to Japan under newly relaxed immigration rules……. https://www.livescience.com/65554-chernobyl-vs-fukushima.html |
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Illness and death legacy of employment in America’s nuclear weapons business
As US modernizes its nuclear weapons, NCR looks at the legacy of one Cold War-era plant, National Catholic Reporter, May 20, 2019 by Claire Schaeffer-Duffy
Ionising radiation as a cause of Chronic Fatigue Syndrome
Radiation Model for Chronic Fatigue Syndrome Announced by the National CFIDS Foundation, https://finance.yahoo.com/news/radiation-model-chronic-fatigue-syndrome-announced-national-cfids-195900691.html NEEDHAM, Mass., May 20, 2019 /PRNewswire/ –The National CFIDS Foundation, of Needham, Massachusetts, has provided details regarding its radiation model for Chronic Fatigue Syndrome, a disease that affects millions in the United States. According to Alan Cocchetto, Medical Director for the National CFIDS Foundation, “Our latest model has now identified two key compounds, known as hydroperoxides, that appear to result from cellular injury due to radiation exposure. We believe this finding is of critical importance to the disease process that is present in our patients.”
According to Gail Kansky, National CFIDS Foundation President, “As I understand it, these compounds make for the perfect storm from a disease standpoint since they adversely affect the ability of the body to function properly at many levels. We believe this to be a major tipping point in our understanding of this disease and I truly expect this to have a significant impact on our patients with regards to diagnostic testing and future therapies that will result from these efforts. As such, we are very pleased to be moving full steam ahead on this with our research groups.”
Two decades ago, Chernobyl scientists had identified Chronic Fatigue Syndrome as a characteristic aftermath of radioecological catastrophe establishing the first link between radiation exposure and the development of the disease. In 2010, the National CFIDS Foundation became the first organization to report the presence of internal radiation and chromosome damage in its own patient cohort.
According to the National CFIDS Foundation, Chronic Fatigue Syndrome (CFS) is also known as Chronic Fatigue Immune Dysfunction Syndrome (CFIDS) as well as Myalgic Encephalomyelitis (ME). Founded in 1997, the goals of the National CFIDS Foundation are to help fund medical research to find a cause and to expedite appropriate treatments for the disease. Since its inception, the National CFIDS Foundation has provided $4 million dollars in self-directed research grants to global scientists. The National CFIDS Foundation, an all volunteer 501(c)(3) federally approved charity, is funded solely by individual contributions. Additional information can be found on the web at www.ncf-net.org or in The National Forum newsletter. The Foundation can be reached at 781-449-3535.
Fukushima’s mothers became radiation experts to protect their children after nuclear meltdown
Key points:
- Mothers in Fukushima set up a radiation testing lab because they didn’t trust government results
- The women test food, water and soil and keep the public informed about radiation levels
- A major earthquake and tsunami caused a nuclear accident at the Fukushima power plant in 2011
They are testing everything — rice, vacuum cleaner dust, seafood, moss and soil — for toxic levels of radiation.
But these lab workers are not typical scientists.
They are ordinary mums who have built an extraordinary clinic.
“Our purpose is to protect children’s health and future,” says lab director Kaori Suzuki.
In March 2011, nuclear reactors catastrophically melted down at the Fukushima Daiichi plant, following an earthquake and tsunami.
Driven by a desperate need to keep their children safe, a group of mothers began testing food and water in the prefecture.
The women, who had no scientific background, built the lab from the ground up, learning everything on the job.
The lab is named Tarachine, a Japanese word which means “beautiful mother”.
“As mothers, we had to find out what we can feed our children and if the water was safe,” Ms Suzuki says.
“We had no choice but to measure the radiation and that’s why we started Tarachine.”
After the nuclear accident, Fukushima residents waited for radiation experts to arrive to help.
“No experts who knew about measuring radiation came to us. It was chaos,” she says.
In the days following the meltdown, a single decision by the Japanese Government triggered major distrust in official information which persists to this day.
The Government failed to quickly disclose the direction in which radioactive materials was drifting from the power plant.
Poor internal communications caused the delay, but the result was that thousands fled in the direction that radioactive materials were flying.
Former trade minister Banri Kaieda, who oversaw energy policy at the time, has said that he felt a “sense of shame” about the lack of disclosure.
But Kaori Suzuki said she still finds it difficult to trust the government.
“They lied and looked down on us, and a result, deceived the people,” Ms Suzuki says.
“So it’s hard for the people who experienced that to trust them.”
She and the other mothers who work part-time at the clinic feel great responsibility to protect the children of Fukushima.
But it hasn’t always been easy.
When they set up the lab, they relied on donated equipment, , and none of them had experience in radiation testing. There was nobody who could teach us and just the machines arrived,” Ms Suzuki says.
“At the time, the analysing software and the software with the machine was in English, so that made it even harder to understand.
“In the initial stage we struggled with English and started by listening to the explanation from the manufacturer. We finally got some Japanese software once we got started with using the machines.”
Radiation experts from top universities gave the mothers’ training, and their equipment is now among the most sophisticated in the country.
Food safety is still an issue
The Fukushima plant has now been stabilised and radiation has come down to levels considered safe in most areas.
But contamination of food from Japan remains a hotly contested issue.
Australia was one of the first countries to lift import restrictions on Japanese food imports after the disaster.
But more than 20 countries and trading blocs have kept their import ban or restrictions on Japanese fisheries and agricultural products.
At the clinic in Fukushima, Kaori Suzuki said she accepted that decision.
“It doesn’t mean it’s right or wrong. I feel that’s just the decision they have made for now,” she says.
Most results in their lab are comparatively low, but the mothers say it is important there is transparency so that people know what their children are consuming.
Fukushima’s children closely monitored after meltdown
Noriko Tanaka is one of many mothers in the region who felt that government officials were completely unprepared for the unfolding disaster.
She was three months pregnant with her son Haru when the disaster struck.
Ms Tanaka lived in Iwaki City, about 50 kilometres south of the power plant.
Amid an unfolding nuclear crisis, she panicked that the radioactive iodine released from the meltdown would harm her unborn child.
She fled on the night of the disaster.
When she returned home 10 days later, the fear of contamination from the invisible, odourless radioactive material weighed deeply on her mind.
“I wish I was able to breastfeed the baby,” she says.
“[Radioactive] caesium was detected in domestic powdered milk, so I had to buy powdered milk made overseas to feed him.”
Ms Tanaka now has two children —seven-year-old Haru and three-year-old Megu. She regularly takes them in for thyroid checks which are arranged free-of-charge by the mothers’ clinic.
Radiation exposure is a proven risk factor for thyroid cancer, but experts say it’s too early to tell what impact the nuclear meltdown will have on the children of Fukushima.
Noriko Tanaka is nervous as Haru’s thyroid is checked.
“In the last examination, the doctor said Haru had a lot of cysts, so I was very worried,” she says.
However this time, Haru’s results are better and he earns a high-five from Dr Yoshihiro Noso.
He said there was nothing to worry about, so I feel relieved after taking the test,” Ms Tanaka says.
“The doctor told me that the number of cysts will increase and decrease as he grows up.”
Doctor Noso has operated on only one child from Fukushima, but it is too early to tell if the number of thyroid cancers is increasing because of the meltdown.
“There isn’t a way to distinguish between cancers that were caused naturally and those by the accident,” he says.Dr Noso says his biggest concern is for children who were under five years old when the accident happened.The risk is particularly high for girls.
Even if I say there is nothing to worry medically, each mother is still worried,” he says.
“They feel this sense of responsibility because they let them play outside and drink the water. If they had proper knowledge of radiation, they would not have done that,” he said.
Mums and doctors fear for future of Fukushima’s children
After the Chernobyl nuclear disaster of 1986, the incidence of thyroid cancers increased suddenly after five years….
“In the case of Chernobyl, the thyroid cancer rate increased for about 10 years. It’s been eight years since the disaster and I would like to continue examinations for another two years.” …….
Some children, whose families fled Fukushima to other parts of Japan have faced relentless bullying.
“Some children who evacuated from Fukushima living in other prefectures are being bullied [so badly that they] can’t go to school,” Noriko Tanaka said.
“The radiation level is low in the area we live in and it’s about the same as Tokyo, but we will be treated the same as the people who live in high-level radiation areas.”
Noriko is particularly worried for little Megu because of prejudice against the children of Fukushima.
“For girls, there are concerns about marriage and having children because of the possibility of genetic issues.”
The International Atomic Energy Agency itself predicted 4,000 cancer deaths from the Chernobyl nuclear accident
While most people know the general story — that due to human error, the nuclear reactor exploded and unleashed radioactive material across Europe — few know the nitty-gritty details. Here are five weird facts you probably didn’t know about Chernobyl. [Images: Chernobyl, Frozen in Time]
1. Similar to Hiroshima
About 30,000 people were near Chernobyl’s reactor when it exploded on April 26, 1986. Those exposed to the radiation are thought to have received about 45 rem (rem is a unit of radiation dosage), on average, which is similar to the average dose received by survivors after the atomic bomb was dropped on Hiroshima in 1945, according to the book “Physics for Future Presidents: The Science Behind the Headlines” (W. W. Norton & Company, 2008) by Richard Muller, a professor emeritus of physics at the University of California, Berkeley.
While 45 rem is not enough to cause radiation sickness (which usually occurs at about 200 rem), it still increases the risk of cancer by 1.8%, Muller wrote. “That risk should lead to about 500 cancer deaths in addition to the 6,000 normal cancers from natural causes.”
However, a 2006 estimate from the International Atomic Energy Agency (IAEA), which is associated with the United Nations, calculated much higher cancer fatalities. The IAEA looked at the total distribution of the radiation, which reached across Europe and even to the United States, and estimated that the cumulative radiation dose from Chernobyl was about 10 million rem, which would have led to an additional 4,000 cancer deaths from the accident, Muller wrote…… https://www.livescience.com/65450-weird-chernobyl-facts.html
Radioactive fallout could be released from melting glaciers
“Anthropocene Nuclear Legacy” –Melting Glaciers Could Unleash Radioactive Fallout https://dailygalaxy.com/2019/05/anthropocene-nuclear-legacy-melting-glaciers-could-unleash-radioactive-fallout/ May 9, 2019 “These materials are a product of what we have put into the atmosphere. This is just showing that our nuclear legacy hasn’t disappeared yet. It’s still there,”said Caroline Clason, a lecturer in Physical Geography at the University of Plymouth of a study published in Nature that surveyed 19,000 of Earth’s glaciers and found their total melt amounts to a loss of 335 billion tons of ice each year, more than measurements of previous studies.“When it was built in the early 1900s, the road into Mount Rainier National Park from the west passed near the foot of the Nisqually Glacier, one of the mountain’s longest,” reports the New York Times. “Visitors could stop for ice cream at a stand built among the glacial boulders and gaze in awe at the ice. The ice cream stand (image below) is long gone.”
The glacier now ends more than a mile farther up the mountain, and they are melting elsewhere around the world too.
This scary scenario of our nuclear legacy was explored by an international team of scientists who studied the spread of radioactive contaminants in Arctic glaciers throughout Sweden, Iceland, Greenland, the Norwegian archipelago Svalbard, the European Alps, the Caucasus, British Columbia, and Antarctica. The researchers shared their results at the 2019 General Assembly of the European Geosciences Union (EGU) in Vienna.
It found man made radioactive material at all 17 survey sites, often at concentrations at least 10 times higher than levels elsewhere. “They are some of the highest levels you see in the environment outside nuclear exclusion zones,” said Caroline Clason
Fallout radionuclides (FRNs) were detected these sites. Radioactive material was found embedded within ice surface sediments called “cryoconite,” and at concentration levels ten times greater than the surrounding environment.“ They are some of the highest levels you see in the environment outside nuclear exclusion zones,” Clason, who led the research project, told AFP.
The Chernobyl disaster of 1986—by far the most devastating nuclear accident to date—released vast clouds of radioactive material including Caesium into the atmosphere, causing widespread contamination and acid rain across northern Europe for weeks afterwards. “Radioactive particles are very light so when they are taken up into the atmosphere they can be transported a very long way,” she told AFP. “When it falls as rain, like after Chernobyl, it washes away and it’s sort of a one-off event. But as snow, it stays in the ice for decades and as it melts in response to the climate it’s then washed downstream.”
The environmental impact of this has been shown in recent years, as wild boar meat in Sweden was found to contain more than 10 times the safe levels of Caesium.
“We’re talking about weapons testing from the 1950s and 1960s onwards, going right back in the development of the bomb,” Clason said. “If we take a sediment core you can see a clear spike where Chernobyl was, but you can also see quite a defined spike in around 1963 when there was a period of quite heavy weapons testing.”
Weapons tests can fling radioactive detritus up to 50 miles in the air. Smaller, lighter materials will travel into the upper atmosphere, and may “circulate around the world for years, or even decades, until they gradually settle out or are brought back to the surface by precipitation,” according to the Environmental Protection Agency.
Fallout is comprised of radionuclides such as Americium-241, Cesium-137, Iodine-131, and Strontium-90. Depending on a material’s half-life, it could remain in the environment minutes to years before decaying. Their levels of radiation also vary.
Particles can return to the immediate area as acid rain that’s absorbed by plants and soil, wreaking havoc on ecosystems, human health, and communities. But radionuclides that travel far and wide can settle in concentrated levels on snow and ice—large amounts of radioactive material from Fukushima was found in 2011 on four glaciers in the Tibetan Plateau, for example.
One of the most potentially hazardous residues of human nuclear activity is Americium, which is produced when Plutonium decays. Whereas Plutonium has a half-life of 14 years, Americium lasts 400.
Americium is more soluble in the environment and it is a stronger alpha (radiation) emitter. Both of those things are bad in terms of uptake into the food chain,” said Clason. While there is little data available on how these materials can be passed down the food chain—even potentially to humans—Clason said there was no doubt that Americium is “particularly dangerous”.
As geologists look for markers of the epoch when mankind directly impacted the health of the planet—known as the Anthropocene—Clason and her team believe that radioactive particles in ice, soil and sediment could be an important indicator.
The team hopes that future research will investigate how fallout could disperse into the food chain from glaciers, calling it a potential “secondary source of environmental contamination many years after the nuclear event of their origin.”
The Daily Galaxy via AFP, France24, and Nature
Patients not always aware of the risks in medical radiation treatment
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Radiation therapy consent forms too difficult to read, Reuters, Lisa Rapaport 10 May 19,
(Reuters Health) – Cancer patients usually get written consent forms to sign before radiation that are supposed to clearly spell out the treatment risks, but a new U.S. study suggests these forms are too complex for most patients to easily understand. While radiotherapy has become more precise in recent years, it can still damage some healthy cells and tissues in addition to destroying the cancer. Common short-term side effects can include fatigue as well as skin problems like itching, blistering and peeling. Lasting side effects depend on the type and location of radiation therapy and can include more serious problems like new malignancies elsewhere on the body. In theory, informed consent is a cornerstone of modern cancer treatment. But the study results suggest that paperwork patients receive to explain radiation is falling short of this goal. “We looked at the readability of these forms and discovered that, even using the most conservative estimates, they were at far higher reading levels than most patients understand,” said study co-author Dr. Andrew Einstein of the Columbia University Irving Medical Center in New York City. …… https://www.reuters.com/article/us-health-radiotherapy-informed-consent/radiation-therapy-consent-forms-too-difficult-to-read-idUSKCN1SE2FR |
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Deep ocean animals are eating radioactive carbon from nuclear bomb tests
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By Kay Vandette , 10 May 19, A new study has revealed that even the most remote and deep regions on Earth are not isolated from human activities. According to the research, radioactive carbon leftover from nuclear bomb tests in the 1950s and 1960s has made its way to the bottom of the ocean. |
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Deep ocean trenches found to have radioactive carbon from nuclear bomb tests
 Radioactive carbon from nuclear bomb tests found in deep ocean trenches, Phys Org, by American Geophysical Union 8 May 19, Radioactive carbon released into the atmosphere from 20th-century nuclear bomb tests has reached the deepest parts of the ocean, new research finds.A new study in AGU’s journal Geophysical Research Letters finds the first evidence of radioactive carbon from nuclear bomb tests in muscle tissues of crustaceans that inhabit Earth’s ocean trenches, including the Mariana Trench, home to the deepest spot in the ocean.
Organisms at the ocean surface have incorporated this “bomb carbon” into the molecules that make up their bodies since the late 1950s. The new study finds crustaceans in deep ocean trenches are feeding on organic matter from these organisms when it falls to the ocean floor. The results show human pollution can quickly enter the food web and make its way to the deep ocean, according to the study’s authors. “Although the oceanic circulation takes hundreds of years to bring water containing bomb [carbon] to the deepest trench, the food chain achieves this much faster,” said Ning Wang, a geochemist at the Chinese Academy of Sciences in Guangzhou, China, and lead author of the new study. “There’s a very strong interaction between the surface and the bottom, in terms of biologic systems, and human activities can affect the biosystems even down to 11,000 meters, so we need to be careful about our future behaviors,” said Weidong Sun, a geochemist at the Chinese Academy of Sciences in Qingdao, China, and co-author of the new study. “It’s not expected, but it’s understandable, because it’s controlled by the food chain.”…… Thermonuclear weapons tests conducted during the 1950s and 1960s doubled the amount of carbon-14 in the atmosphere when neutrons released from the bombs reacted with nitrogen in the air. Levels of this “bomb carbon” peaked in the mid-1960s and then dropped when atmospheric nuclear tests stopped. By the 1990s, carbon-14 levels in the atmosphere had dropped to about 20 percent above their pre-test levels. This bomb carbon quickly fell out of the atmosphere and mixed into the ocean surface. Marine organisms that have lived in the decades since this time have used bomb carbon to build molecules within their cells, and scientists have seen elevated levels of carbon-14 in marine organisms since shortly after the bomb tests began……..https://phys.org/news/2019-05-radioactive-carbon-nuclear-deep-ocean.html |
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Low level radiation exposure and increased risks of hypertension, cardiovascular disease and cerebrovascular disease
Moderate dose of radiation increase risk of hypertension https://www.asianage.com/life/health/060519/moderate-dose-of-radiation-increase-risk-of-hypertension.html
“It is necessary to inform the public that not only high doses of radiation but low to moderate doses also increase the risk of hypertension and other circulatory system diseases, which today contribute significantly to death and disability. As a result, all radiological protection principles and dose limits should be strictly followed for workers and the general public,” added Tamara Azizova, lead author of the study. Uncontrolled hypertension, also known as high blood pressure, can lead to heart attack, stroke, heart failure and other serious health problems. Earlier studies linked exposure to high doses of radiation to increased risk of cardiovascular diseases and death from those diseases.
This study is the first to find an increased risk of hypertension to low doses of ionizing radiation among a large group of workers who were chronically exposed over many years.
The study included more than 22,000 workers. The workers were hired between 1948 and 1982, with an average length of time on the job of 18 years. Half had worked there for more than 10 years. All of the workers had comprehensive health check-ups and screening tests at least once a year with advanced evaluations every five years.
The researchers evaluated the workers’ health records up to 2013. More than 8,400 workers (38 per cent of the group) were diagnosed with hypertension, as defined in this study as a systolic blood pressure reading of 140 mm Hg, and a diastolic reading 90 mm Hg. Hypertension incidence was found to be significantly associated with the cumulative dose.
To put it in perspective, the hypertension incidence among the workers in the study was higher than that among Japanese survivors of the atomic bomb at the end of World War II but lower than the risk estimated for clean-up workers following the Chernobyl nuclear accident.
The differences may be explained by variations in exposure among the three groups, according to the researchers.
Following the atomic bombing, the Japanese experienced a single, high-dose exposure of radiation, the Chernobyl workers were exposed to radiation for a short time period (days and months), while the Russian workers were chronically exposed to low doses of radiation over many years.
While the development of cancer is commonly associated with radiation exposure, “We believe that an estimate of the detrimental health consequences of radiation exposure should also include non-cancer health outcomes. We now have evidence suggesting that radiation exposure may also lead to increased risks of hypertension, cardiovascular disease and cerebrovascular disease, as well,” said Azizova.
High blood pressure risk from prolonged exposure to low-dose ionising radiation
Prolonged exposure to low-dose radiation may increase the risk of hypertension, a known cause of heart disease and stroke https://www.sciencedaily.com/releases/2019/05/190503080554.htm
- Date:
- May 3, 2019
- Source:
- American Heart Association
- Summary:
- A long-term study of Russian nuclear plant workers suggests that prolonged low-dose radiation exposure increases the risk of hypertension. This study is the first to associate an increased risk of hypertension to low doses of ionizing radiation among a large group of workers who were chronically exposed over many years. The higher the cumulative dose of radiation, the greater the risk, the study showed.
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Prolonged exposure to low doses of ionizing radiation increased the risk of hypertension, according to a study of workers at a nuclear plant in Russia published in the American Heart Association’s journal Hypertension.
Uncontrolled hypertension, also known as high blood pressure, can to lead to heart attack, stroke, heart failure and other serious health problems.
Earlier studies linked exposure to high doses of radiation to increased risk of cardiovascular diseases and death from those diseases. This study is the first to find an increased risk of hypertension to low doses of ionizing radiation among a large group of workers who were chronically exposed over many years.
The study included more than 22,000 workers at the first large-scale nuclear enterprise in Russia known as the Mayak Production Association. The workers were hired between 1948 and 1982, with an average length of time on the job of 18 years. Half had worked there for more than 10 years. All of the workers had comprehensive health check-ups and screening tests at least once a year with advanced evaluations every five years.
The researchers evaluated the workers’ health records up to 2013. More than 8,400 workers (38 percent of the group) were diagnosed with hypertension, as defined in this study as a systolic blood pressure reading of ?140 mm Hg, and a diastolic reading ? 90 mm Hg. Hypertension incidence was found to be significantly associated with the cumulative dose.
- To put it in perspective, the hypertension incidence among the workers in the study was higher than that among Japanese survivors of the atomic bomb at the end of World War II, but lower than the risk estimated for clean-up workers following the Chernobyl nuclear accident.
The differences may be explained by variations in exposure among the three groups, according to the researchers. Following the atomic bombing, the Japanese experienced a single, high-dose exposure of radiation, the Chernobyl workers were exposed to radiation for a short time period (days and months), while the Mayak workers were chronically exposed to low doses of radiation over many years.
While the development of cancer is commonly associated with radiation exposure, “we believe that an estimate of the detrimental health consequences of radiation exposure should also include non-cancer health outcomes. We now have evidence suggesting that radiation exposure may also lead to increased risks of hypertension, cardiovascular disease and cerebrovascular disease, as well,” said Tamara Azizova, M.D., lead author of the study at the Southern Urals Biophysics Institute in Russia.
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Azizova pointed out that in recent years, the number of people exposed to radiation in everyday life, such as during diagnostic procedures, has increased. “It is necessary to inform the public that not only high doses of radiation, but low to moderate doses also increase the risk of hypertension and other circulatory system diseases, which today contribute significantly to death and disability. As a result, all radiological protection principles and dose limits should be strictly followed for workers and the general public.”
How radiation exposure may increase the risk of hypertension is still a question, according to Azizova. “So far, the mechanisms remain unclear, not only for certain cohorts but also for the general population. One of the main tasks for the coming decade is to study the mechanisms of hypertension and heart and brain atherosclerosis occurring in people who are — and who were exposed — to radiation.”
The authors note that their study is a retrospective one, and while many health conditions and behaviors were documented in the medical records of the workers (such as age, smoking, alcohol consumption and body mass index), other factors, such as stress and nutrition, were unavailable for researchers to be taken into account in this study.
Story Source:
Materials provided by American Heart Association.
- Journal Reference:
- Tamara Azizova, Ksenia Briks, Maria Bannikova, Evgeniya Grigoryeva. Hypertension Incidence Risk in a Cohort of Russian Workers Exposed to Radiation at the Mayak Production Association Over Prolonged Periods. Hypertension, 2019; DOI: 10.1161/HYPERTENSIONAHA.118.11719
USA Defense Dept knew that radiation causes birth defects. Now nuclear test veterans worry
 Atomic veteran wonders at radiation’s effects, PostStar, Will Doolittle will@poststar.comMay 2, 2019, GLENS FALLS — Bill Jones went to paradise for 13 months in the mid-1950s, and it wasn’t until many years later, when he and others were finally released from their vows of secrecy, that he found out what a hell it really had been…….
But he doesn’t know for sure, and the government isn’t telling, which is what really bothers him. He has scars on his scalp from having growths removed, but at 84 considers himself fortunate. Benefits are available for atomic veterans, and Jones called the Department of Justice about qualifying for them.
He was told, “As soon as I get a terminal illness, call back.” “There’s not an awful lot of these atomic veterans left. There’s a lot that don’t know about the program, so they waste away, shall we say,” he said. Fred Schafer, an officer with the National Association of Atomic and Nuclear Veterans, says the soldiers were guinea pigs. “They wanted to see what happened,” he said, referring to the U.S. military establishment, which was monitoring the soldiers’ reactions to nuclear radiation. “They wanted to see how fast they could get in after using these bombs.”
Jones wasn’t allowed to tell Charlotte what he was doing on Enewetak. He couldn’t take photos, he could make only one phone call every two or three months, and his letters were reviewed. Anything he sent home, like a sea shell scooped up from the sand, had to be checked with a Geiger counter first. |
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of the week– Nuclear Reactor Information Task Force
14 May – online event From Bombs to Data Centres: the Face of Nuclear Colonialism
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