Skip to main content

Home/ Open Intelligence / Energy/ Group items tagged rubble

Rss Feed Group items tagged

D'coda Dcoda

Fukushima Update: Why We Should (Still) Be Worried [20Jan12] - 0 views

  • you would think the Japanese government would be doing everything in its power to contain the disaster. You would be wrong—dead wrong.
  • nstead of collecting, isolating, and guarding the millions of tons of radioactive rubble that resulted from the chain reaction of the 9.0 earthquake, the subsequent 45- to 50-foot wall of water that swamped the plant and disabled the cooling systems for the reactors, and the ensuing meltdowns, Japanese Environment Minister Goshi Hosono says that the entire country must share Fukushima’s plight by accepting debris from the disaster.
  • an estimated 20 million tons of wreckage on the land, much of which—now ten months after the start of the disaster—is festering in stinking piles throughout the stricken region. (Up to 20 million more tons of rubble from the disaster—estimated to cover an area approximately the size of California—is also circulating in the Pacific.)
  • ...9 more annotations...
  • the sheer amount of radioactive rubble is proving difficult to process. The municipal government of Kashiwa, in Chiba Prefecture to the west and south of Tokyo, recently shut down one of its main incinerators, because it can’t store any more than the 200 metric tons of radioactive ash it already has that is too contaminated to bury in a landfill.
  • According to the California-based Fukushima Fallout Awareness Network (FFAN), burning Fukushima’s radioactive rubble is the worst possible way to deal with the problem. That’s because incinerating it releases much more radioactivity into the air, not only magnifying the contamination all over Japan but also sending it up into the jet stream. Once in the jet stream, the radioactive particles travel across the Northern Hemisphere, coming back down to earth with rain, snow, or other precipitation.
  • Radiation used to be a word that evoked serious concern in a lot of people. However, the nuclear industry and its supporters have done a masterful job in allaying public fears about it. They do this in significant part by relying on outdated and highly questionable data collected on Japanese atom bomb survivors, while at the same time ignoring and dismissing inconvenient but much more relevant evidence that shows the actual harmful effects of radiation exposure from nuclear accidents. Author Gayle Greene explains this well in a recent article here. In their attempt to win the public over to their viewpoint, nuclear proponents even trot out the dubious theory of radiation hormesis, which says that low doses of radiation are actually good for you, because they stimulate an immune response. Well, so does something that causes an allergic reaction. But I digress…
  • “Plutonium is biologically and chemically attracted to bone as is the naturally occurring radioactive chemical radium. However, plutonium clumps on the surface of bone, delivering a concentrated dose of alpha radiation to surrounding cells, whereas radium diffuses homogeneously in bone and thus has a lesser localized cell damage effect. This makes plutonium, because of the concentration, much more biologically toxic than a comparable amount of radium.”
  • different radioisotopes give off different kinds of radiation—alpha, beta, gamma, X ray, or neutron emissions—all of which behave differently. Alpha emitters, such as plutonium and radon, are intensely ionizing but don’t penetrate very far and generally can’t get through the dead layers of cells covering skin. But when they are inhaled from the air or ingested from radiation-contaminated food or water, they emit high-energy particles that can do serious damage to the cells of sensitive internal soft tissues and organs. The lighter, faster-moving beta particles can penetrate far more deeply than alpha particles, though sheets of metal and heavy clothing can block them. Beta particles are also very dangerous when inhaled or ingested. Strontium-90 and tritium, a radioactive form of hydrogen, are both beta emitters. Gamma radiation is a form of electromagnetic energy like X rays, and it passes through clothing and skin straight into the body. A one-inch shield of either lead or iron, or eight inches of concrete are needed to stop gamma rays, examples of which include cobalt-60 and cesium-137—one of the radionuclides of most concern in the Fukushima fallout
  • The behavior of radioisotopes out in the environment also varies depending on what they encounter. They can combine with one another or with stable chemicals to form molecules that may or may not dissolve in water. They can combine with solids, liquids, or gases at ordinary temperature and pressure. They may be able to enter into biochemical reactions, or they may be biologically inert.
  • In her book No Immediate Danger: Prognosis for a Radioactive Earth, Bertell notes that if they enter the body either through air, food, water, or an open wound, “They may remain near the place of entry into the body or travel in the bloodstream or lymph fluid. They can be incorporated into the tissue or bone. They may remain in the body for minutes or hours or a lifetime.”
  • radioactive elements, also known as radioisotopes or radionuclides, are unstable atoms. They seek stability by giving off particles and energy—ionizing radiation—until the radioisotope becomes stable. This process occurs within the nucleus of the radioisotope, and the shedding of these particles and energy is commonly referred to as ‘‘nuclear disintegration.’’ Nuclear radiation expert Rosalie Bertell describes the release of energy in each disintegration as ‘‘an explosion on the microscopic level.” This process is known as the “decay chain,” and during their decay, most radioactive elements morph into yet other radioactive elements on their journey to becoming lighter, stable atoms at the end of the chain. Some of the morphed-into elements are much more dangerous than the original radioisotope, and the decay chain can take a very long time. This is the reason that radioactive contamination can last so long
  • the EPA was so confident that Fukushima fallout would not be a problem for U.S. citizens that it stopped its specific monitoring of fallout from Fukushima less than two months after the meltdowns began. But neglecting to monitor the fallout will not make it go away. In fact, another enormous problem with radioactive contamination is that it bioaccumulates in the environment, which means it concentrates as it moves up the food chain.
D'coda Dcoda

Fukushima Part II? Tokyo to begin burning massive amounts of radioactive waste from dis... - 0 views

  • We are basically recreating Fukushima all over again -Arnie Gundersen, nuclear engineer Rubble from quake- and tsunami-hit areas to be disposed in Tokyo, Mainichi, September 29, 2011: [Emphasis Added] [...] Tokyo decided to process rubble from disaster-hit areas after detecting only 133 becquerels of radioactive cesium per kilogram of ash generated after rubble was incinerated [...] [D]ue to radiation fears, little progress has been made in efforts to dispose of such waste. [...] The metropolitan government intends to transport approximately 500,000 metric tons of rubble to facilities in the capital and dispose of them over a 2 1/2-year period from this coming October to March 2014. [...] The waste will be separate into burnable and unburnable items. Burnable waste will be incinerated [...] Tokyo Metropolitan Government will regularly measure the amount of radiation in the incinerated ash [...]
  • See also: “We are basically recreating Fukushima all over again” — Clouds of radiation continue across to Pacific Northwest (VIDEO): At 7:30 in (Transcript Summary) Arnie Gundersen, chief nuclear engineer at Fairewinds Associates: US would be burying 8,000 Bq/kg radioactive waste underground for thousands of years Lots of serious ramifications from burning of nuclear waste Material from Fukushima that was on the ground is now going airborne again Towns now getting cesium redeposited on them by the burning of nuclear material Clouds of radiation recontaminating areas deemed clean or low Continues across to the Pacific Northwest We are basically recreating Fukushima all over again >> Have your voice be heard. Visit the discussion thread: What should be done about Japan burning radioactive debris until at least March 2014? <<
D'coda Dcoda

The Economist: Fukushima engineer reveals workers "often keeled over" while clearing ra... - 0 views

  • Setting the scene for its revealing report on the plight of workers at Fukushima Daiichi, the Economist details conditions outside the stricken plant. “Patrol cars stop passing vehicles,” notes the reporter, “The police are particularly vigilant in preventing unauthorised people getting near the stricken plant.” Meet the Workers
  • The air of secrecy is compounded when you try to approach workers involved in the nightmarish task of stabilising the nuclear plant. Many are not salaried Tepco staff but low-paid contract workers lodging in Iwaki, just south of the exclusion zone.” “It is easy to spot them, in their nylon tracksuits — They seem to have been recruited from the poorest corners of society”: One calls home from a pay phone because he can’t afford a mobile phone Another has a single front tooth Both are reluctant to talk to journalist (condition of employment is silence) They share their concerns about safety One said he got 30 minutes of safety training He said almost everything he learned about radiation risks came from TV
  • Conditions On-site Hiroyuki Watanabe, an Iwaki official reports there are “many safety breaches.” “Workers wading through contaminated water complain that their boots have holes in them — Some are not instructed in when to change the filters on their safety masks,” according to Watanabe. “Even such basic tools as wrenches are in short supply, he claims. Tepco is shielded by a lack of media scrutiny. The councillor shows a Tepco gagging order that one local boss had to sign. Article four bans all discussion of the work with outsiders. All requests for media interviews must be rejected.”
  • ...1 more annotation...
  • The Engineer “One engineer who has played a front-line role in helping cool the meltdown of Fukushima’s three reactors spoke unwittingly to The Economist.” The engineer revealed to the Econominst the in May, “The hardest work was done by the low-level labourers. They had so much rubble to clear, he says, that they often keeled over in the heat under the weight of their protective gear. Taken out in ambulances, they would usually be back the following day.”
D'coda Dcoda

Accelerate decontamination , Japan [26Aug11] - 1 views

  • Some 100,000 people are still living as evacuees away from their homes in the wake of the severe accidents at Tokyo Electric Power Co.'s Fukushima No. 1 nuclear power plant. Kyodo News has reported that some 17,000 children in Fukushima Prefecture have changed schools or kindergartens because of radiation fears. Of these children, some 8,000 moved out of the prefecture.
  • Given this situation, it is imperative that the central government vigorously push the work of decontaminating areas contaminated with radioactive substances released from the nuclear power reactors. The central and local governments also should provide psychological care to both children who moved to new schools or kindergartens and children who have remained at their schools and kindergartens.
  • The Diet is expected to soon enact a special law under which the central government will be responsible for disposing of highly radioactive rubble and sludge, and decontaminating radioactive soil. In some cases, the central and local governments will carry out decontamination work together. The cost will be shouldered by Tepco.
  • ...8 more annotations...
  • To accelerate the decontamination work, the Kan administration has decided to set up an office to deal with radioactive contamination within the Cabinet and a decontamination team in Fukushima Prefecture.
  • The education and science ministry estimates that radiation accumulation at 35 places inside the warning area in a period of one year from the start of the nuclear fiasco will exceed 20 millisieverts per year, a level sufficient enough to trigger an evacuation order. At 14 of these places, it is estimated that the radiation level will be more than 100 millisieverts per year. At one place, it is estimated that the level will be 508.1 millisieverts per year and at another 223.7 millisieverts per year.
  • The data underline the need for the central government to carry out decontamination work methodically and with perseverance. It also should take a serious look at the fact that radioactive contamination has spread outside Fukushima Prefecture. Beef cows in many parts of eastern Japan were fed on radioactive rice straw and the cows were was shipped to all the prefectures except Okinawa. Radioactive contamination has also been detected in sludge of sewage treatment plants in many parts of eastern Japan.
  • The central government must establish methods to decontaminate areas so that local governments can easily emulate them. It is expected to collect necessary data from a model project in the Ryozan area in Date, Fukushima Prefecture. Decontamination will be carried out in an area of 100-meter-by-100-meter square that will include agricultural fields and houses with extremely high radiation levels.
  • Depending on the nature of soil, the central government will try several decontamination methods such as directing high pressure water to wash away radioactive substances and removing soil after hardening it with chemicals. After determining the cost and benefit of the contamination work, and the amount of radioactive substances collected, it will write a decontamination manual as well as develop computer software to measure the effect of decontamination work.
  • Another problem is how to deal with radioactive rubble in areas devastated by the March 11 earthquake and tsunami, and radioactive sludge that has accumulated at sewage treatment plants. Decontamination of areas contaminated with radioactive substances will also produce contaminated soil. The central government must hurriedly find places for long-term storage of contaminated rubble, sludge and soil.
  • Your Party has made a reasonable proposal concerning decontamination work. It calls for giving priority to decontaminating areas close to Fukushima No. 1, radiation "hot spots," as well as kindergartens and parks. Its main aim is to minimize the effect of radiation on children and pregnant women. The central government and other parties should carefully study the proposal and take legislative and other necessary actions.
  • To ensure effective decontamination, detailed radiation maps will be indispensable. A reliable system to accurately gauge radiation levels of various foods also should be set up. Decontamination will be a difficult and time-consuming task. It is important that the central and local governments give accurate information about the situation to local residents and avoid giving a false hope about when evacuees can return to their homes. The central government envisages a long-term goal of limiting people's radiation exposure to 1 millisievert per year. But Mr. Shunichi Tanaka, a former acting chairman of the Atomic Energy Commission, who carried out decontamination work in Iidate and Date in Fukushima Prefecture, says that in some places in the prefecture, it is impossible to lower the radiation level to 1 millisievert per year and that a realistic goal should be 5 millisieverts per year. Informed public discussions should be held on this point.
  •  
    A letter to the editor of Japan Times
D'coda Dcoda

Experts split on how to decommission Fukushima nuclear plant [29Aug11] - 0 views

  • What is actually going to take place at the Fukushima No. 1 Nuclear Power Plant, where word is that the four reactors that were crippled in the Great East Japan Earthquake and tsunami will eventually be decommissioned? The Ministry of Economy, Trade and Industry's Nuclear and Industrial Safety Agency (NISA) defines "decommissioning" as the process of removing spent fuel from reactors and dismantling all facilities. Ultimately, the site of a decommissioned reactor is meant to be reverted into a vacant lot.
  • In 1996, the then Japan Atomic Energy Research Institute (JAERI) -- now the Japan Atomic Energy Agency (JAEA) -- finished decommissioning its Japan Power Demonstration Reactor. The decommissioning process of the Tokai Nuclear Power Plant in the Ibaraki Prefecture village of Tokai began in 1998 and is set to end in fiscal 2020, while the No. 1 and No. 2 nuclear reactors at the Hamaoka Nuclear Power Plant in the Shizuoka Prefecture city of Omaezaki are slated for decommissioning by fiscal 2036. Around the world, only around 15 nuclear reactors have thus far been dismantled.
  • The standard decommissioning process entails six major steps: 1. Remove spent fuel rods, 2. Remove radioactive materials that have become affixed to reactor pipes and containers, 3. Wait for radiation levels to go down with time, 4. Dismantle reactors and other internal vessels and pipes, 5. Dismantle the reactor buildings, and 6. Make the site into a vacant lot.
  • ...17 more annotations...
  • "Cleaning," "waiting," and "dismantling" are the three key actions in this process. Needless to say, this all needs to be done while simultaneously containing radioactive materials.
  • In the case of the Tokai Nuclear Power Plant, the first commercial plant to undergo decommissioning, spent fuel was removed over a span of three years beginning in 1998, and was transported to Britain for reprocessing. Dismantling of the facilities began in 2001, with current efforts being made toward the dismantling of heat exchangers; workers have not yet begun to take the reactor itself apart. The entire process is expected to be an 88.5-billion-yen project involving 563,000 people.
  • Hitachi Ltd., which manufactures nuclear reactors, says that it "generally takes about 30 years" to decommission a reactor. The Hamaoka Nuclear Power Plant's No. 1 and No. 2 reactors operated by Chubu Electric Power Co. are also expected to take about 30 years before they are decommissioned.
  • In the case of the Fukushima No. 1 Nuclear Power Plant, meanwhile, the biggest challenge lies in how to remove the fuel, says Tadashi Inoue, a research advisor at the Central Research Institute of Electric Power Industry (CRIEPI), a foundation that conducts research on energy and environmental issues in relation to the electrical power industry.
  • "we must deal with rubble contaminated with radioactive materials that were scattered in the hydrogen blasts and treat the radiation-tainted water being used to cool nuclear fuel before we can go on to fuel removal."
  • Currently, the Fukushima plant's operator, Tokyo Electric Power Co. (TEPCO), is desperately trying to treat the contaminated water. Huge challenges remain with regards to the contaminated rubble, as radiation levels of over 10 sieverts per hour were found near outdoor pipes on the plant grounds just the other day. Exposure to such high levels would mean death for most people.
  • Each step in the process toward decommissioning is complicated and requires great numbers of people. It's a race against time because the maximum amount of radiation that workers can be exposed to is 250 millisieverts.
  • The breached reactor core is a bigger problem. It is believed that raising water levels inside the reactor has been difficult because of a hole in the bottom of the vessel. It will be necessary to plug the hole, and continue filling the vessel with water while extracting the melted fuel. How to fill the vessel with water is still being debated. If the reactor can be filled with water, steps taken after the 1979 Three Mile Island nuclear accident can serve as a guide because in that case, in which approximately 50 percent of the core had melted, workers were able to fill the reactor with water and remove the fuel within.
  • Two types of fuel removal must take place. One is to take out the spent fuel in the containment pools, and the other is to remove the melted fuel from the reactor cores. Because the radiation levels of the water in the spent fuel pools have not shown any significant changes from before the crisis, it is believed that the spent fuel has not suffered much damage. However, removing it will require repairing and reinstalling cranes to hoist the fuel rods out.
  • Prefacing the following as "a personal opinion," Inoue says: "Building a car that can protect the people inside as much as possible from radioactive materials, and attaching an industrial robotic arm to the car that can be manipulated by those people could be one way to go about it."
  • Inoue predicts that removal of spent fuel from the containment pools will begin about five years after the crisis, and about 10 years in the case of melted fuel from the reactor core. Work on the four reactors at the Fukushima plant will probably take several years.
  • "Unless we look at the actual reactors and take and analyze fuel samples, we can't know for sure," Inoue adds. Plus, even if workers succeed in removing the fuel, reprocessing it is an even more difficult task. A review of processing methods and storage sites, moreover, has yet to take place.
  • Meanwhile, at least one expert says he doesn't believe that workers will be able to remove the melted fuel from the crippled plant.
  • "If there's 10 sieverts per hour of radiation outside, then the levels must be much higher closer to the reactor core," says Tadahiro Katsuta, an associate professor at Meiji University and an expert in reactor engineering and reactor policy who was once a member of an anti-nuclear non-profit organization called Citizens' Nuclear Information Center (CNIC). "The fuel has melted, and we haven't been able to cool it consistently. If work is begun five or 10 years from now when radiation levels have not yet sufficiently gone down, workers' health could be at serious risk."
  • Katsuta predicts that it will probably take at least 10 years just to determine whether it is possible to remove the fuel. He adds that it could very well take 50 years before the task of dismantling the reactor and other facilities is completed.
  • What Katsuta has in mind is a Chernobyl-style concrete sarcophagus, which would entail cloaking the melted tomb with massive amounts of concrete. "How could we simultaneously dismantle four reactors that have been contaminated to the extent that they have by radioactive materials?" asks Katsuta. "Japan has little experience in decommissioning reactors, and this case is quite different from standard decommissioning processes. It's not realistic to think we can revert the site back to a vacant lot. I think we should be considering options such as entombing the site with concrete or setting up a protective dome over the damaged reactor buildings
  • what we face is a great unknown to all of mankind.
D'coda Dcoda

6 months into Japan's cleanup, radiation a major worry [20Sep11] - 0 views

  • Related Story Content Story Sharing Tools Share with Add This Print this story E-mail this story Related Related Links Japan PM feared nuclear disaster worse than Chornobyl Special Report: Disaster in Japan Japan ignored own radiation forecasts FAQ: Radiation's health effects Timeline of events at the Fukushima Daiichi nuclear complex FAQ: Nuclear reactorsAccessibility Links Beginning of Story Content TOKYO –
  •  Related Story Content Story Sharing Tools Share with Add This Print this story E-mail this story Related Related Links Japan PM feared nuclear disaster worse than Chornobyl Special Report: Disaster in Japan Japan ignored own radiation forecasts FAQ: Radiation's health effects Timeline of events at the Fukushima Daiichi nuclear complex FAQ: Nuclear reactors Accessibility Links Beginning of Story Content TOKYO –  The scars of Japan’s March 11 disaster are both glaringly evident and deceptively hidden. Six months after a tsunami turned Japan’s northeast into a tangled mess of metal, concrete, wood and dirt, legions of workers have made steady progress hauling away a good portion of the more than 20 million tonnes of debris covering ravaged coastal areas. The Environment Ministry says it expects to have it all removed by next March, and completely disposed of by 2014. 'I think Tokyo Electric Power Company (TEPCO), as well as the Japanese government, made many mistakes.' —Shoji Sawada, theoretical particle physicist But a weightless byproduct of this country’s March 11 disaster is expected to linger for much longer.  The Japanese learned a lot about the risks posed by radiation after the United States dropped atomic bombs on Hiroshima and Nagasaki in 1945. Now, once again, they are facing this invisible killer. This time, the mistake is of their own making. "I’m afraid," says Shoji Sawada, a theoretical particle physicist who is opposed to the use of nuclear energy .  Sawada has been carefully monitoring the fallout from the accident at the Fukushima Daiichi power plant. “I think many people were exposed to radiation. I am afraid [they] will experience delayed effects, such as cancer and leukemia.” Evacuation zone Japan's government maintains a 20-kilometre evacuation zone around the Fukushima Daiichi plant, with no unauthorized entry allowed. The government has urged people within a 30-km radius of the plant to leave, but it's not mandatory. Some people say the evacuation zone should include Fukushima City, which is 63 km away from the plant. At the moment, the roughly 100,000 local children are kept indoors, schools have banned soccer and outdoor sports, pools were closed this summer, and building windows are generally kept closed. A handful of people argue the government should evacuate all of Fukushima prefecture, which has a population of about 2 million.  Sawada dedicated his career to studying the impact radiation has on human health, particularly among the survivors of Japan’s atomic bombings. His interest is both professional and personal. When he was 13 years old, his mother urged him to flee their burning home in Hiroshima. She died, trapped beneath rubble . “I think Tokyo Electric Power Company [TEPCO], as well as the Japanese government, made many mistakes,” he says. Those mistakes have been clearly documented since the earthquake and tsunami triggered meltdowns and explosions at TEPCO’s Fukushima Daiichi, some 220 kilometres northeast of Tokyo. Warnings to build a higher tsunami wall were ignored; concerns about the safety of aging reactors covered up; and a toothless nuclear watchdog exposed as being more concerned with promoting atomic energy than protecting the public
  • The scars of Japan’s March 11 disaster are both glaringly evident and deceptively hidden. Six months after a tsunami turned Japan’s northeast into a tangled mess of metal, concrete, wood and dirt, legions of workers have made steady progress hauling away a good portion of the more than 20 million tonnes of debris covering ravaged coastal areas. The Environment Ministry says it expects to have it all removed by next March, and completely disposed of by 2014.
  • ...5 more annotations...
  • The Japanese learned a lot about the risks posed by radiation after the United States dropped atomic bombs on Hiroshima and Nagasaki in 1945. Now, once again, they are facing this invisible killer. This time, the mistake is of their own making. "I’m afraid," says Shoji Sawada, a theoretical particle physicist who is opposed to the use of nuclear energy
  • Sawada has been carefully monitoring the fallout from the accident at the Fukushima Daiichi power plant. “I think many people were exposed to radiation. I am afraid [they] will experience delayed effects, such as cancer and leukemia.”
  • Sawada dedicated his career to studying the impact radiation has on human health, particularly among the survivors of Japan’s atomic bombings. His interest is both professional and personal. When he was 13 years old, his mother urged him to flee their burning home in Hiroshima. She died, trapped beneath rubble
  • The result: a nuclear crisis with an international threat level rating on par with the 1986 disaster in Chernobyl.
  • “The Japanese government has a long history of lying or hiding the truth,” insists Gianni Simone, citing the cover-up of mercury poisoning in the 1950s and the HIV-tainted blood scandal of the 1980s. The freelance writer and Italian teacher lives just south of Tokyo with his wife, Hisako, and their eight and 10-year-old sons
D'coda Dcoda

TEPCO Notes Rise in Radioactive Leaks from Damaged Reactors [23Jan12] - 0 views

shared by D'coda Dcoda on 24 Jan 12 - No Cached
  • Tokyo Electric Power Co. <9501> on Monday reported an increase in radioactive materials leaking from damaged nuclear reactors at the Fukushima No. 1 power plant.    The total amount of radioactive cesium that leaked from the containment vessels of the No. 1 to No. 3 reactors reached 70 million becquerels per hour, up 12 million becquerels from the December level, the power firm said.   It seems that radioactive dusts were stirred up because plant workers went inside reactor buildings and removed rubble, TEPCO officials said.
  •  The outcome was reported to the second meeting on medium- to long-term measures toward decommissioning of the damaged reactors held between the firm and the government on Monday.   Last month, the leaked amount was put at 10 million becquerels each for the No. 1 and No. 2 reactors and 40 million becquerels for the No. 3 reactor.
D'coda Dcoda

Is any job worth this risk? I speak to Fukushima clear-up workers [19Aug11] - 0 views

  • Why on earth would anyone choose to work at what’s left of the Fukushima-Daiichi nuclear power station? The job description probably goes something like this: - must spend day in full body suit, gloves, thick rubber boots and full-facial mask
  • - must endure extremely high temperatures in aforementioned suits - must work on badly damaged site containing the remains of 4 crippled nuclear reactors
  • Employees are under strict instructions not to speak to journalists – and supervisors from their various employers keep an active eye on them when they return to Iwaki in the evening. We were thrown out of one hotel when we had the audacity to approach a group of men employed to clear rubble from the site. Yet there were others who wanted to talk – albeit anonymously. Their working conditions I asked? Terrible, they said: “a burning-hell”, “terrifying” and “very troubling” – phrases I recorded in my notebook. But I wasn’t getting any closer to answering my question – why work there?
  • ...8 more annotations...
  • This blindingly obvious question was firmly in my mind when we travelled to Iwaki City – a mid-sized, non-descript sort of place that now finds itself uncomfortably close to the world’s worst nuclear accident since Chernobyl. Many of its residents have now evacuated, fearing the radioactive leaks that continue to spew from the plant. Many of the 3,000 workers now employed in clean-up operations at the plant have taken their place, cramming the local hotels and renting otherwise deserted family homes.
  • These employment “opportunities” are an unfortunate by-product of Japan’s great earthquake and tsunami. The folks at the “Tokyo Electric Power Company” (TEPCO), built a 5.7m seawall to protect the complex from natural disasters – but the tsunami wave was 13.1 m high.
  • - must brave dangerously high levels of radiation (you may feel like you a suffocating in full-facial mask but no, you cannot take it off).
  • Money is certainly the big motivator. Japan has been mired in recession for decades and the country’s 54 nuclear power plants have long provided work to low or non-skilled, itinerant workers. Fukushima is no different – although it is much more dangerous.
  • A Channel 4 News researcher rang a number on a “jobs-available” poster that we found plastered on a wall in Iwaki. “What sort of experience do you have,” said the man on the phone to our researcher. “Well I’ve done some car maintenance,” said our researcher. “Good enough,” said the man, presumably one of the 600 “subcontractors” engaged by TEPCO. Our researcher asked about the daily rate. “Six-thousand yen (£50),” he said. That quickly went up to 8,500 yen (£67) as our researcher hummed and hawed a bit. But there was something special on offer said the subcontractor. “You can earn 40,000 yen (£315) an hour if you want, but what you have to do is dangerous.” We didn’t find out what that job entailed but it probably involved some sort of increased risk of radiation exposure.
  • One man told us he had come out of “a sense of duty” and there were others who were simply told by their employers that they had to work at Fukushima. “Could you refuse?” I asked one technician. “Well, that would put you in a very uncomfortable position,” he said before adding, “Japanese workers are very obedient.”
  • If they don’t challenge their superiors in the workplace, what do these men (and we didn’t meet any women working at the plant) tell their loved ones at home? Well, it turns out some of them don’t actually tell their wives and children what they’re up to. “Wives just get panicked,” said one. “It is better just to say that I’m working on the clean-up (of the coast) in Myagi,” he added.  Another employee described how his mother took the news. “She was totally shocked – but she didn’t stop me. (My family) are very worried about me – about the heat and my health and radiation exposure.”
  • It’s a long-term form of job security I suppose – the containment and maintenance of highly toxic materials that will take thousands of years to decompose. But is any job worth these sorts of risks? Workers told us they couldn’t afford to be choosey about where they take jobs – but I got the distinct impression the majority wished it was somewhere else.
D'coda Dcoda

Editorial: Say "no" to nuclear energy and autocratic governments [26Aug11] - 0 views

  • Editorial: Say “no” to nuclear energy and autocratic governments Translated by Lydia Ma A recent article in Business Today (763 edition) claimed that Taiwanese people are living under the threat of more than 10,000 nuclear bombs that, if detonated, would reduce their homes to rubble and their stocks to less than the paper they’re written on.
  • The article goes on to introduce Hirai Norio, a Japanese worker who worked at a power plant in Tokyo for 20 years before dying from cancer. Shortly before his death, Hirai Norio disclosed publicly all that he’d learned about nuclear energy. He also predicted the nuclear accident that happened this year in Japan before his death 15 years ago.
  • Hirai Norio wasn’t the first one to sound the alarm on the perils of nuclear energy. In 1973, E. F. Schumacher, author of Small is Beautiful, pointed out that it wasn’t right to use highly radioactive and poisonous energy solely for economic gain. He had misgivings about using such a powerful and destructive technology that no human being could confidently control.
  • ...2 more annotations...
  • world leaders are beginning to back away from nuclear energy, some even setting a timetable to transition their country into a nuclear-free zone. In contrast, Taiwanese leaders seem unperturbed and deaf to popular sentiments about nuclear accidents and very intent on making Taiwan a dictatorship and a technocracy.
  • Beginning October 2011, PCT will host 24 seminars on how to create a nuclear-free Taiwan. The purpose of these seminars is to educate and involve the public by raising awareness on nuclear energy and autocratic governments. The choice before us all is whether to live under the shadow or threat of a nuclear meltdown or to live at ease in a nuclear-free country.
  •  
    Translation of piece about nuclear industry in Taiwan and efforts to stop nuclear development
D'coda Dcoda

Japan: piles of tsunami debris turning into giant bonfires [19Sep11] - 0 views

  • Piles of decomposing organic waste, metals and rubble from the devastated towns of north-east Japan have been bursting into fire, posing a new hazard to emergency teams tasked with clearing away the debris and people who are still picking through the remains of their homes.
  • Fire departments in Miyagi and Iwate prefectures have been called out to deal with 24 blazes that had started inside the towering piles of debris that are being gathered on the outskirts of towns that were devastated by the March 11 earthquake and the tsunami that it triggered. Smoke has been reported emerging from wreckage at a further 13 sites.
  • The fires are apparently being caused by bacteria in the organic debris or metal reacting with water, fuel or other chemicals that were released when the tsunami - which in places reached a height of 132 feet - swept through these communities. In many places, pools of oil are still visible in areas that are being cleared, while tens of thousands of vehicles are leaking fuel where they have been piled atop one another as they wait to be taken away to be recycled. The heat of the summer months have also served to dry out wood, paper, foam and other combustible materials that are being collected together.
D'coda Dcoda

Despite Fukushima demonstration, NRC task force ignores warning on dangerous ... - 0 views

  • The Nuclear Regulatory Commission’s (NRC) “Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident” publicly released its 92-page well intentioned near-term review on the implications of the Fukushima Daiichi nuclear disaster for US reactors on July 13, 2011.  The federal agency proposes to improve its “patchwork of regulatory requirements” developed “piece by piece over the decades.” Beyond Nuclear remains concerned that many critical reactor safety areas are still dominated by industry “voluntary initiatives” where non-compliance continues to elude federal enforcement and  Capitol Hill pro-nuclear champions announced their resistance to any costly safety improvements
  • Of most concern, the NRC is still ignoring warnings as did its predecessor, the Atomic Energy Commission,  in 1972 from their senior safety officer, Dr. Steven Hanuaer to “discourage all further use” in the US of the Fukushima-style General Electric Mark I boiling water reactor. The federal regulators instead issued three more construction permits and eventually 16 more operating licenses in the 1970s for this same dangerous design. There are now 23 Fukushima-style reactors operating in the United States as part of a total of 32 Mark I’s worldwide---counting the smoldering radioactive rubble at Fukushima.   The NRC task force report does not fundamentally address the most critical issue coming out of the Fukushima catastrophe, namely, the design vulnerability of all Mark I containment structures to catastrophic failure during a severe accident
  • The NRC report further ignores that these same Mark I reactors, like Vermont Yankee and Oyster Creek, are not currently in compliance with their operating licenses that were originally required to have a reliable "leak tight" containment structure. If the NRC were looking for the most significant and meaningful safety upgrade to the US reactors directly impacted by the Fukushima disaster they would require that all Mark I reactor operators restore containment integrity to the original licensed leak tight condition. Or order that they be shut them down, permanently.  All of the Mark I reactors voluntarily installed retrofits to vent all a substandard and undersized containment to save it from rupturing during a severe accident. The same experimental vent was installed at Fukushima in 1991. The same experimental fix failed on three containments buildings to prevent the uncontrolled releases of radioactivity to the air and water that are still occurring now four months after the accident.
  • ...2 more annotations...
  • Instead, in order to keep these dangerous reactors operational, many now with twenty year license extensions, the NRC task force is recommending that rather than the industry volunteering a dubious containment vent system, the NRC should order the nuclear industry to take another try at an experimental venting fix which fundamentally compromises their own defense in depth philosophy.
  • the same day that the NRC  publicly released its report in the USA, Japanese Prime Minister Naoto Kan announced that the implications of Fukushima for nuclear power in Japan meant that “’We will aim to bring about a society that can exist without nuclear power,’ he said.” Perhaps, now too late for a society to live without the threat of increasing radioactivity levels.
D'coda Dcoda

Worker dies while decontaminating in Fukushima [12Oct11] - 0 views

  • SOURCE: News: Sending people to hell, Fukushima Diary, October 10, 2011 [...] a man died all of a sudden while he was decontaminating in Date shi of Fukushima. [...] @touchan3 [Oct. 9 at 10:00p EDT]
  • He was involved in decontamination of school play grounds and rubble.
  • @touchan3 [Oct. 10 at 12:00a EDT]
  • ...1 more annotation...
  • When someone found him, he was dead in the rice field.
D'coda Dcoda

Shutdown of Fukushima Reactors Is Ahead of Schedule [Nov11] - 0 views

  • Editor's Note: This is part of the IEEE Spectrum special report: Fukushima and the Future of Nuclear Power.
  • This past April, when the Japanese government and Tokyo Electric Power Co. (TEPCO) jointly unveiled their plan to bring the damaged reactors of the Fukushima Dai-ichi nuclear power plant to a cold shutdown and gain control of the release of radioactive materials, they set a tentative completion date for mid-January 2012. And "tentative" had to be the operative word, for the obstacles TEPCO faced—and to some extent still does face—are challenging in the extreme. They include:
  • Fuel rod meltdowns in reactors 1, 2, and 3 due to loss of cooling systems following the 11 March earthquake and tsunami; Severe damage to the upper levels of reactor buildings 1, 3, and 4 and slight damage to building 2, stemming from hydrogen explosions; High levels of radiation and contaminated rubble, making working conditions hazardous and difficult; Thousands of metric tons of contaminated water accumulating on the site and leaking out of the reactors.
  • ...5 more annotations...
  • Critics, however, were quick to question the stability of the system and its ad hoc design. The combination of filtering and decontamination technologies—mainly from the French nuclear giant Areva and the U.S. nuclear waste management company Kurion—includes some 4 kilometers of piping. The critics have a point. Even with the addition of a reportedly more robust system (to be used in parallel or as backup as needed) from Toshiba and IHI Corp., TEPCO admits the system underwent 39 disruptions between 10 July and 8 September. One consequence is that roughly 100 000 metric tons of water still need to be decontaminated.
  • It appears, however, that the process is now ahead of schedule. Environment Minister Goshi Hosono, who is also in charge of the Fukushima nuclear accident recovery, told the International Atomic Energy Agency's annual general conference in Vienna on 19 September that Japan was now aiming to complete a cold shutdown of the Fukushima plant by December 2011, instead of mid-January 2012. Progress was already evident in July, when Hosono announced that workers had completed step 1 of the two-step road map on schedule, reducing radioactive emissions and starting to bring down the core temperatures in reactors 1, 2, and 3. Hosono attributed the success to the construction of a new cooling system, which had begun pumping water into all three damaged reactors. In addition to cooling, the system also decontaminates the water accumulating in the basements of the reactor and turbine buildings. The contamination is the result of injected water coming into contact with the molten fuel in the pressure vessels.
  • Disruptions and remaining challenges notwithstanding, TEPCO has been making progress toward step 2 of the road map: a cold shutdown. According to TEPCO, that means achieving and maintaining a temperature of less than 100 °C as measured at the bottom of a reactor pressure vessel—the steel vessel containing the fuel rods—which itself is enclosed inside a protective containment vessel. A major advance came at the beginning of September, when TEPCO was able to start up the core spray lines to cool reactors 1 and 3. The core spray lines apply water directly to the cores from above, while the system installed in July has been cooling the cores by injecting water from the bottom. TEPCO has also begun increasing the amount of water being injected into reactor 2. The core spray line could not be used until recently because TEPCO first had to survey the subsystem's piping and valves. Given the high radiation in the area, this was difficult, but workers completed the job in July and confirmed the system's operability in August.
  • By late September, as a result of these efforts, the temperatures in all three reactors had dropped below 100 °C for the first time since the accident. As of 29 September, the temperatures for reactors 1, 2, and 3, respectively, were 77.5 °C, 99.7 °C, and 78.7 °C. "We are steadily bringing the postaccident situation under control," says Hosono. "To achieve step 2 this year, we'll move the schedule forward and do our best." But Yoshinori Moriyama, deputy director-general of Japan's Nuclear and Industrial Safety Agency (NISA) is cautious. "We need to maintain this state over the midterm," he says. "Temporary lower temperatures and the nonrelease of radioactive substances do not immediately mean that this is a cold shutdown." In order for NISA to declare a cold shutdown, the temperatures must remain stable and below 100 °C into December. So NISA won't officially declare a cold shutdown until near the end of 2011.
  • Despite these positive developments, nuclear experts point out that achieving a cold shutdown does not make the troubled plant completely safe, given that even spent fuel continues to generate heat for years after use. And upon achieving a cold shutdown, TEPCO must take on a new series of challenges. These include finding where the injected water is escaping, stopping those leaks, dealing with the accumulated contaminated water, removing and storing the thousands of spent fuel rods from the pools in reactors 1 to 4, and then figuring out a way to remove the melted fuel. The last is a task that could take a decade or more, according to experts.
D'coda Dcoda

18M tonnes of tsunami debris drifting to B.C. [25Oct11] - 0 views

  • Up to 18 million tonnes of tsunami debris floating from Japan could arrive on British Columbia's shores by 2014, according to estimates by University of Hawaii scientists. A Russian training ship spotted the junk — including a refrigerator, a television set and other appliances — in an area of the Pacific Ocean where the scientists from the university's International Pacific Research Center predicted it would be. The biggest proof that the debris is from the Japanese tsunami is a fishing boat that's been traced to the Fukushima Prefecture, the area hardest hit by the March 11 disaster.
  • Jan Hafner, a scientific programmer, told The Associated Press on Tuesday that researchers' projections show the debris would reach Hawaii's shores by early 2013, before reaching the West Coast. They estimate the debris field is spread out across an area that's roughly 3,200 kilometres long and 1,600 kilometres wide located between Japan and Midway Atoll, where pieces could wash up in January.Computer models to track debris pathJust how much has already sunk and what portion is still floating is unknown.
  • "It's a common misconception it's like one mat that you could walk on," he said. Hafner and the principal researcher in the project, oceanographer Nikolai Maximenko, have been researching surface ocean currents since 2009. When the Japan earthquake and tsunami struck, they applied their research to the rubble sucked into the Pacific Ocean from Japan.
1 - 16 of 16
Showing 20 items per page