High-priced Fukushima ice wall nears completion, but effectiveness doubtful — The Mainichi

” A subterranean ice wall surrounding the nuclear reactors at the stricken Fukushima No. 1 Nuclear Power Plant to block groundwater from flowing in and out of the plant buildings has approached completion.

Initially, the ice wall was lauded as a trump card in controlling radioactively contaminated water at the plant in Fukushima Prefecture, which was crippled by meltdowns in the wake of the March 2011 Great East Japan Earthquake and tsunami. But while 34.5 billion yen from government coffers has already been invested in the wall, doubts remain about its effectiveness. Meanwhile, the issue of water contamination looms over decommissioning work.

In a news conference at the end of July, Naohiro Masuda, president and chief decommissioning officer of Fukushima Daiichi Decontamination & Decommissioning Engineering Co., stated, “We feel that the ice wall is becoming quite effective.” However, he had no articulate answer when pressed for concrete details, stating, “I can’t say how effective.”

The ice wall is created by circulating a coolant with a temperature of minus 30 degrees Celsius through 1,568 pipes that extend to a depth of 30 meters below the surface around the plant’s reactors. The soil around the pipes freezes to form a wall, which is supposed to stop groundwater from flowing into the reactor buildings where it becomes contaminated. A total of 260,000 people have worked on creating the wall. The plant’s operator, Tokyo Electric Power Co. (TEPCO) began freezing soil in March last year, and as of Aug. 15, at least 99 percent of the wall had been completed, leaving just a 7-meter section to be frozen.

Soon after the outbreak of the nuclear disaster, about 400 tons of contaminated water was being produced each day. That figure has now dropped to roughly 130 tons. This is largely due to the introduction of a subdrain system in which water is drawn from about 40 wells around the reactor buildings. As for the ice wall, TEPCO has not provided any concrete information on its effectiveness. An official of the Secretariat of the Nuclear Regulation Authority (NRA) commented, “The subdrain performs the primary role, and the ice wall will probably be effective enough to supplement that.” This indicates that officials have largely backtracked from their designation of the ice wall as an effective means of battling contaminated water, and suggests there is unlikely to be a dramatic decrease in the amount of decontaminated groundwater once the ice wall is fully operational.

TEPCO ordered construction of the ice wall in May 2013 as one of several plans proposed by major construction firms that was selected by the government’s Committee on Countermeasures for Contaminated Water Treatment. In autumn of that year Tokyo was bidding to host the 2020 Olympic and Paralympic Games, and the government sought to come to the fore and underscore its measures to deal with contaminated water on the global stage.

Using taxpayers’ money to cover an incident at a private company raised the possibility of a public backlash. But one official connected with the Committee on Countermeasures for Contaminated Water Treatment commented, “It was accepted that public funds could be spent if those funds were for the ice wall, which was a challenging project that had not been undertaken before.” Small-scale ice walls had been created in the past, but the scale of this one — extending 1.5 kilometers and taking years to complete — was unprecedented.

At first, the government and TEPCO explained that an ice wall could be created more quickly than a wall of clay and other barriers, and that if anything went wrong, the wall could be melted, returning the soil to its original state. However, fears emerged that if the level of groundwater around the reactor buildings drops as a result of the ice wall blocking the groundwater, then tainted water inside the reactor buildings could end up at a higher level, causing it to leak outside the building. Officials decided to freeze the soil in stages to measure the effects and effectiveness of the ice wall. As a result, full-scale operation of the wall — originally slated for fiscal 2015 — has been significantly delayed.

Furthermore, during screening by the NRA, which had approved the project, experts raised doubts about how effective the ice wall would be in blocking groundwater. The ironic reason for approving its full-scale operation, in the words of NRA acting head Toyoshi Fuketa, was that, “It has not been effective in blocking water, so we can go ahead with freezing with peace of mind” — without worrying that the level of groundwater surrounding the reactor buildings will decrease, causing the contaminated water inside to flow out.

Maintaining the ice wall will cost over a billion yen a year, and the radiation exposure of workers involved in its maintenance is high. Meanwhile, there are no immediate prospects of being able to repair the basement damage in the reactor buildings at the crippled nuclear plant.

Nagoya University professor emeritus Akira Asaoka commented, “The way things stand, we’ll have to keep maintaining an ice wall that isn’t very effective. We should consider a different type of wall.”

In the meantime, TEPCO continues to be plagued over what to do with treated water at the plant. Tainted water is treated using TEPCO’s multi-nuclide removal equipment to remove 62 types of radioactive substances, but in principle, tritium cannot be removed during this process. Tritium is produced in nature through cosmic rays, and nuclear facilities around the world release it into the sea. The NRA takes the view that there is no problem with releasing treated water into the sea, but there is strong resistance to such a move, mainly from local fishing workers who are concerned about consumer fears that could damage their businesses. TEPCO has built tanks on the grounds of the Fukushima No. 1 plant to hold treated water, and the amount they hold is approaching 800,000 metric tons.

In mid-July, TEPCO Chairman Takashi Kawamura said in an interview with several news organizations that a decision to release the treated water into the sea had “already been made.” A Kyodo News report on his comment stirred a backlash from members of the fishing industry. TEPCO responded with an explanation that the chairman was not stating a course of action, but was merely agreeing with the view of the NRA that there were no problems scientifically with releasing the treated water. However, the anger from his comment has not subsided.

Critical opinions emerged in a subsequent meeting that the Ministry of Economy, Trade and Industry held in the Fukushima Prefecture city of Iwaki at the end of July regarding the decontamination of reactors and the handling of contaminated water. It was pointed out that prefectural residents had united to combat consumer fears and that they wanted officials to act with care. One participant asked whether the TEPCO chairman really knew about Fukushima.

The ministry has been considering ways to handle the treated water, setting up a committee in November last year that includes experts on risk evaluation and sociology. As of Aug. 15, five meetings had been held, but officials have yet to converge on a single opinion. “It’s not that easy for us to say, ‘Please let us release it.’ It will probably take some time to reach a conclusion,” a government official commented. “

by The Mainichi

source

The comic strip journalist who reports on the fallout from Fukushima — The Spinoff

” On the eve of his appearance at a Victoria University event in Wellington, comic book author Fumio Obata talks to Guy Somerset about his ongoing project chronicling the aftermath of the Fukushima tsunami and nuclear disaster.

At art school, Fumio Obata was taught the importance of “the theme, having something of your own, something only you can do”. The theme that has preoccupied Obata for the past five years is one he has truly made his own. He has been chronicling, through striking comic book reportage, the devastating consequences of the magnitude 9.1 earthquake that struck off the northeast Pacific coast of Japan in March 2011, causing a tsunami and meltdowns and radioactive contamination at the Fukushima Daiichi nuclear plant.

Published in Italian magazine Internazionale and on his website, Obata’s comic strips capture the long-term effects of Fukushima and explore some of the knotty social, political and environmental issues raised by the disaster and its aftermath. The strips are destined to become his second book, his first being 2014’s internationally successful graphic novel Just So Happens, for which The Observer reviewer Rachel Cooke praised his “crazily accomplished” storytelling and described him as “a talent to watch”.

Reviews like that – and there were plenty more where it came from – can bring a writer a lot of opportunities and Obata was no exception, but he laughs: “I haven’t used them very well. Terrible, isn’t it? The good guys who had their debuts the same time as me, they are already on to their third or fourth book. Whereas me, I’m just caught up in this massive theme. Strategy-wise, I’m not very good!”

Obata is at Victoria University of Wellington this week as a visiting scholar in its School of Design. While he’s there, he’s taking part in a four-day international symposium on cultural sustainability, including a free public event with fellow writers Australian Ellen van Neerven and New Zealander Pip Adam.

His trip from the UK, where he has lived since 1991, when his Anglophile parents sent him to boarding school there from Japan, was broken with a stop-off in Tokyo and more reporting from the region around Fukushima, where 19,416 people died as a result of the 2011 earthquake and tsunami. There are still 2553 people listed as missing and 123,000 evacuees scattered around the country.

A YouTube video on Obata’s website gives a sense of what such reporting can entail. In it, dressed in a white protective suit, he walks through an eerily desolate ghost town that is about two kilometres from Fukushima and part of the designated exclusion zone.

“If you become friends with a resident, they have a pass and you can go there with them,” he says. He and his friend wore protective suits, but clear-up and other workers don’t. “They don’t become ill. They say it is fine. Even in the exclusion zone, it’s not all equally radioactive. Because particles are not going to be evenly dispersed. When you walk around with the Geiger counter, you notice that sometimes the figure is very low, then you go several feet away from that spot and the figure jumps up. Even outside the exclusion zone, if you go to the bits closest to the zone you find the figures are very high.”

Obata’s reporting, which he describes as “a kind of journalism, but I’m more doing my philosophical take on it”, begins with him taking photographs and recording interviews.

“Because I’m trying to structure a narrative, usually it’s the words I start with. I listen to the interviews I did and write down as much as I can. Then I take out the key words, the phrases I think are important, simplifying it. It’s very important simplifying the information. Because what I’m making is a comic strip. It’s not an article, which allows you to have I don’t know how many words: 2000, 3000. I need the space for pictures so I can’t have 3000 words.

“After that, I look at the photographs. Again, I may have about 200 photographs. I have to go through them and use about 10 out of 200. Those photographs are going to be my visual sources. Then I start sketching. All those sketches and rough pictures, they are like pieces of the puzzle. I’ve got a dozen pieces of puzzle with words and phrases and I’ve got the other side of the puzzle with the photographs, and I basically put them together.”

One of the most affecting stories Obata tells is that of Norio Kimura, whose father, wife and seven-year-old youngest daughter Yūna were lost in the tsunami. While the bodies of his father and wife were found in April 2011, Yūna’s remained missing. After the official search for her ended, Kimura continued looking, taking 1000km round trips to do so. After five years and nine months, a piece of bone was discovered that DNA testing proved was one of Yūna’s.

“Yūna was torn apart into small pieces, taken away with contaminated debris, now stored around anonymously,” reads one of the story’s panels. “Had they done the search longer and more carefully from the start, she could have been found a lot earlier, with her body almost intact too.”

The story ends with a panel reading: “A child has been left out alone in the shadow of the reconstruction. And her presence now poses a lot of questions to us.”

This is emotionally momentous material, very different to some of Obata’s other work, be it his 2004 anime of Duran Duran’s song Careless Memories for their then stage show or the short comic about the art of pencil sharpening you’ll find on his website.

Getting it right must weigh upon him, one imagines: these are hugely significant events and he’s almost certainly the only person who’s going to approach them in this form.

“Yeah, big pressure,” he says. “It’s very difficult to do. I appreciate people allow me to talk to them. Some say no, of course. I’ve heard tragic stories but they’ve asked me not to write about it. It’s interesting because they wanted to share that with somebody, somebody who’s not shared the same experience they have.

“The father I met is very vocal because he’s angry. He’s just full of anger. He’s trying to change something about the law, for the love of his daughter. It’s very moving. That’s why he basically opened up to me. His story is still developing and he’s still searching for the remains of his daughter.”

Another panel in the same story is of a city skyline at night and reads: “The nuclear plant was built to provide electricity to the capital region. By knowing Fukushima today, Tokyo could look arrogant, with all the excess of lights and luxury.”

It’s a point elegantly distilled – even poetically so.

But Obata is not one to cast simplistic blame. “It is something I have to tell people, especially my students [at the University of Gloucester and other universities around the UK where he teaches as a guest lecturer] when they try to do something about the world. They are angry young men, angry young people, but there are layers to things. There’s no right or wrong; the people are goodies and the people are baddies as well.

“When a tragedy happens, we tend to think there’s a victim and there’s an offender. There’s going to be people who get accused and there are victims who get all the sympathy from the public. But sometimes it’s not like that. Sometimes you can’t make things black and white.

“What’s happening with nuclear is one of these things. If you start reading just a short history of the nuclear industry, or nuclear technology, you see a lot of people believe in the technology and I can’t blame them, because I can’t prove them wrong. They get accused and the people who accuse them have right things to say and I can’t blame them either.

“So basically there are no answers to it and it’s very uncomfortable for the human mind not to have answers. You need a bit of patience and courage to accept that. This is one of the things I am going to say at the end, I think: it’s difficult to accept an open ending but you’ve got to have the courage.”

As for Tokyo: “The consumption of energy really helped to establish today’s Japan’s reputation. And I’m part of it. I can’t really criticise it. I just have to take in the contradiction and try to respond.”

Responding to this and the other contradictions he’s encountered in the past five years still has a way to run for Obata. Asked if he’s going to make the 2018 publication date his website gives for his book, he laughs: “Nah, of course not. I just have to put a lot of energy into it and hope the pictures can deliver the intensity of what I’ve seen.” “

by Guy Somerset, The Spinoff

source with comic strip photos

Excessive radiation detected in vehicles removed from Fukushima nuke plant — The Mainichi

” Radiation topping the government-set limit has been detected in about 190 vehicles removed from the premises of the Fukushima No. 1 Nuclear Power Plant after the outbreak of the nuclear crisis, it has been learned.

Some of the cars were sold on the used-car market while two others remain unaccounted for, according to plant operator Tokyo Electric Power Co. (TEPCO).

Approximately 1,700 vehicles were parked on the premises of the power station when the nuclear crisis broke out after it was hit by the powerful earthquake and tsunami on March 11, 2011, TEPCO officials said. Of those, about 600 were owned by employees of TEPCO or companies contracted by the utility. Over a 12-day period until radiation screenings began on March 23 of that year, people could drive the vehicles out of the premises of the plant without checks.

The Economy, Trade and Industry Ministry instructed TEPCO in February 2012 to conduct a follow-up probe into the use of these vehicles for fear that next owners of those cars could be exposed to radiation without knowing that the vehicles were contaminated.

The power company conducted a survey on employees and contracted companies that parked their cars on the plant’s premises at the time of the accident, and confirmed that about 460 vehicles were brought out of the plant by April 2015. It was learned that radiation levels for around 190 of the vehicles exceeded government-set safety standards, and some of them were found contaminated with radiation nearly 10 times over the limit. All the vehicles whose radiation levels exceeded the limit were collected from their owners and are now stored on TEPCO’s premises situated in a Fukushima Prefecture area designated as a highly contaminated “difficult-to-return zone.”

TEPCO is considering how to dispose of these heavily contaminated vehicles, with an official saying, “We’d like to continue searching for two vehicles that remain unaccounted for and respond to the situation in an appropriate manner.” ”

source

New proposal suggests removing Fukushima plant’s melted nuclear fuel from side — The Mainichi

” A method to remove melted nuclear fuel debris on the bottom of the containment vessels of Fukushima No. 1 Nuclear Power Plant’s first, second and third reactors from the side was proposed by the Nuclear Damage Compensation and Decommissioning Facilitation Corporation (NDF) on July 31.

Hajimu Yamana, head of the NDF, which is tasked with considering how to remove fuel debris from the reactors, for the first time explained the organization’s specific method proposal to the heads of local governments at a countermeasures for the decommissioning and handling of the contaminated water council meeting held in Iwaki, Fukushima Prefecture.

The method would focus on prioritizing the removal of debris from the bottom of the vessels from the side, using robotic arms and other remote devices while flushing water over the debris. However, ways to block radiation and countermeasures against the scattering of airborne radioactive dust still remain unsolved. The central government and Tokyo Electric Power Co. (TEPCO) plan to finalize their policy to remove the debris and amend the decommission schedule in September.

In all three of the reactors, contaminated water has collected at the bottom of the containment vessels. The NDF had previously considered a “flooding method” that would fill the containment vessels completely with water to block radiation from leaking. However, measures to repair the containment vessels and prevent leakage of the radioactive water would be difficult, so the plan was put aside for having “too many issues.” “

by The Mainichi

source

Radioactive hot particles still afloat throughout Japan six years after Fukushima meltdowns — BuzzFlash

” Radioactive particles of uranium, thorium, radium, cesium, strontium, polonium, tellurium and americium are still afloat throughout Northern Japan more than six years after a tsunami slammed into the Fukushima Daiichi Power Plant causing three full-blown nuclear meltdowns. That was the conclusion reached by two of the world’s leading radiation experts after conducting an extensive five-year monitoring project.

Arnie Gundersen and Marco Kaltofen authored the peer reviewed study titled, Radioactively-hot particles detected in dusts and soils from Northern Japan by combination of gamma spectrometry, autoradiography, and SEM/EDS analysis and implications in radiation risk assessment, published July 27, 2017, in Science of the Total Environment (STOLEN).

Gundersen represents Fairewinds Associates and is a nuclear engineer, former power plant operator and industry executive, turned whistleblower, and was CNN’s play-by-play on-air expert during the 2011 meltdowns. Kaltofen, of the Worcester Polytechnic Institute (WPI), is a licensed civil engineer and is renowned as a leading experts on radioactive contamination in the environment.

415 samples of “dust and surface soil” were “analyzed sequentially by gamma spectrometry, autoradiography, and scanning electron microscopy with energy dispersive X-ray analysis” between 2011 and 2016. 180 of the samples came from Japan while another 235 were taken from the United States and Canada. The study further clarifies, “Of these 180 Japanese particulate matter samples, 57 were automobile or home air filters, 59 were surface dust samples, 29 were street dusts (accumulated surface soils and dusts) and 33 were vacuum cleaner bag or other dust samples.”

108 of the Japanese samples were taken in 2016, while the other 72 were gathered in 2011 after the meltdowns. Gundersen and Kaltofen tapped 15 volunteer scientists to help collect the dust and soil — mostly from Fukushima Prefecture and Minamisoma City. “A majority of these samples were collected from locations in decontaminated zones cleared for habitation by the National Government of Japan,” the study revealed. For the 108 samples taken in 2016, an “International Medcom Inspector Alert surface contamination monitor (radiation survey meter) was used to identify samples from within low lying areas and on contaminated outdoor surfaces.”

Fairewinds Associates’ video from 2012 features Gundersen collecting five samples of surface soil from random places throughout Tokyo — places including a sidewalk crack, a rooftop garden, and a previously decontaminated children’s playground. The samples were bagged, declared through Customs, and brought back to the U.S. for testing. All five samples were so radioactive that according to Gundersen, they “qualified as radioactive waste here in the United States and would have to be sent to Texas to be disposed of.” Those five examples were not included as part of the recently released study, but Gundersen went back to Tokyo for samples in 2016. Those samples were included, and were radioactive, and according to Gundersen were “similar to what I found in Tokyo in [2012].”

Furthermore, 142 of the 180 samples (about 80 percent) contained cesium 134 and cesium 137. Cesium 134 and 137, two of the most widespread byproducts of the nuclear fission process from uranium-fueled reactors, are released in large quantities in nuclear accidents. Cesium emits intense beta radiation as it decays away to other isotopes, and is very dangerous if ingested or inhaled. On a mildly positive note, the study shows that only four of the 235 dust samples tested in the United States and Canada had detectable levels of cesium from Fukushima.

Cesium, due to its molecular structure, mimics potassium once inside the body, and is often transported to the heart where it can become lodged, thereafter mutating and burning heart tissue which can lead to cardiovascular disease. Other isotopes imitate nutritive substances once inside the body as well. Strontium 90 for example mimics calcium, and is absorbed by bones and teeth.

“Different parts of the human body (nerves, bones, stomach, lung) are impacted differently,” Kaltofen told EnviroNews in an email. “Different cells have radio-sensitivities that vary over many orders of magnitude. The body reacts differently to the same dose received over a short time or a long time; the same as acute or chronic doses in chemical toxicity.”

In contrast to external X-rays, gamma, beta or alpha rays, hot particles are small mobile pieces of radioactive elements that can be breathed in, drunk or eaten in food. The fragments can then become lodged in bodily tissue where they will emanate high-intensity ionizing radiation for months or years, damaging and twisting cells, potentially causing myriad diseases and cancer. The study points out, “Contaminated environmental dusts can accumulate in indoor spaces, potentially causing radiation exposures to humans via inhalation, dermal contact, and ingestion.”

The study also explains, “Given the wide variability in hot particle sizes, activities, and occurrence; some individuals may experience a hot particle dose that is higher or lower than the dose calculated by using averaged environmental data.” For example, a person living in a contaminated area might use a leaf blower or sweep a floor containing a hefty amount of hot particle-laden dust and receive a large does in a short time, whereas other people in the same area, exposed to the same background radiation and environmental averages, may not take as heavy a hit as the housekeeper that sweeps floors for a living. People exposed to more dust on the job, or who simply have bad luck and haphazardly breathe in hot radioactive dust, are at an increased risk for cancer and disease. High winds can also randomly pick up radioactive surface soil, rendering it airborne and endangering any unsuspecting subject unlucky enough to breath it in.

Hot particles, or “internal particle emitters” as they are sometimes called, also carry unique epidemiological risks as compared to a chest X-ray by contrast. The dangers from radiation are calculated by the dose a subject receives, but the manner in which that dose is received can also play a critical factor in the amount of damage to a person’s health.

“Comparing external radiation to hot particles inside the body is an inappropriate analogy,” Gundersen toldEnviroNewsin an email. “Hot particles deliver a lot of energy to a very localized group of cells that surround them and can therefore cause significant localized cell damage. External radiation is diffuse. For example, the weight from a stiletto high heal shoe is the same as the weight while wearing loafers, but the high heal is damaging because its force is localized.”

Kaltofen elaborated with an analogy of his own in a followup email with EnviroNews saying:

Dose is the amount of energy in joules absorbed by tissue. Imagine Fred with a one joule gamma dose to the whole body from living in a dentist’s office over a lifetime, versus Rhonda with exactly the same dose as alpha absorbed by the lung from a hot particle. Standard health physics theory says that Fred will almost certainly be fine, but Rhonda has about a 10 percent chance of dying from lung cancer — even though the doses are the same.

External radiation and internal hot particles both follow exactly the same health physics rules, even though they cause different kinds of biological damage. Our data simply shows that you can’t understand radiation risk without measuring both.

Some isotopes, like plutonium, only pose danger to an organism inside the body. As an alpha emitter, plutonium’s rays are blocked by the skin and not strong enough to penetrate deep into bodily tissue. However, when inhaled or ingested, plutonium’s ionizing alpha rays twist and shred cells, making it one of the most carcinogenic and mutagenic substances on the planet.

“Measuring radioactive dust exposures can be like sitting by a fireplace,” Dr. Kaltofen explained in a press release. “Near the fire you get a little warm, but once in a while the fire throws off a spark that can actually burn you.”

“We weren’t trying to see just somebody’s theoretical average result,” Kaltofen continued in the press release. “We looked at how people actually encounter radioactive dust in their real lives. [By] combining microanalytical methods with traditional health physics models… we found that some people were breathing or ingesting enough radioactive dust to have a real increase in their risk of suffering a future health problem. This was especially true of children and younger people, who inhale or ingest proportionately more dust than adults.”

“Individuals in the contaminated zone, and potentially well outside of the mapped contaminated zone, may receive a dose that is higher than the mean dose calculated from average environmental data, due to inhalation or ingestion of radioactively-hot dust and soil particles,” the study says in summation. “Accurate radiation risk assessments therefore require data for hot particle exposure as well as for exposure to more uniform environmental radioactivity levels.” ”

source with video by Arnie Gundersen

Increases in perinatal mortality in prefectures contaminated by the Fukushima nuclear power plant accident in Japan — U.S. National Library of Medicine

This is a spatially stratified longitudinal study.

” Abstract

Descriptive observational studies showed upward jumps in secular European perinatal mortality trends after Chernobyl. The question arises whether the Fukushima nuclear power plant accident entailed similar phenomena in Japan. For 47 prefectures representing 15.2 million births from 2001 to 2014, the Japanese government provides monthly statistics on 69,171 cases of perinatal death of the fetus or the newborn after 22 weeks of pregnancy to 7 days after birth. Employing change-point methodology for detecting alterations in longitudinal data, we analyzed time trends in perinatal mortality in the Japanese prefectures stratified by exposure to estimate and test potential increases in perinatal death proportions after Fukushima possibly associated with the earthquake, the tsunami, or the estimated radiation exposure. Areas with moderate to high levels of radiation were compared with less exposed and unaffected areas, as were highly contaminated areas hit versus untroubled by the earthquake and the tsunami. Ten months after the earthquake and tsunami and the subsequent nuclear accident, perinatal mortality in 6 severely contaminated prefectures jumped up from January 2012 onward: jump odds ratio 1.156; 95% confidence interval (1.061, 1.259), P-value 0.0009. There were slight increases in areas with moderate levels of contamination and no increases in the rest of Japan. In severely contaminated areas, the increases of perinatal mortality 10 months after Fukushima were essentially independent of the numbers of dead and missing due to the earthquake and the tsunami. Perinatal mortality in areas contaminated with radioactive substances started to increase 10 months after the nuclear accident relative to the prevailing and stable secular downward trend. These results are consistent with findings in Europe after Chernobyl. Since observational studies as the one presented here may suggest but cannot prove causality because of unknown and uncontrolled factors or confounders, intensified research in various scientific disciplines is urgently needed to better qualify and quantify the association of natural and artificial environmental radiation with detrimental genetic health effects at the population level. ”

by Hagen Heinrich Scherb, Dr rer nat Dipl-Math, Kuniyoshi Mori, MD, and Keiji Hayashi, MD

source