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Before the Fukushima accident brought to light the parlous state of the Japanese nuclear industry, for years temporary workers have jumped in and out of remunerative short-term jobs at the power plants ignoring the risk of their profession. Takeshi Kawakami (川上武志) was one of the so-called ‘nuclear gypsies’ and just like many other colleagues of his, for about 30 years he made a livelihood working at the different nuclear plants of the country for short periods. For years he earned money helping repair or replace malfunctioning parts of nuclear reactors and carrying out dangerous operations, with a high-risk of radiation exposure.

In his blog, Kawakami denounced the corruption and collusion between the government and the nuclear industry, focusing his coverage on the Hamaoka nuclear power plant. This power plant was recently shut down at the request of the Japanese government for remedial work after it was deemed dangerous to continue operating in light of its position on one of the major seismic faults lines in the Japanese archipelago. In the post partly translated here, he tells of his experiences as a temporary worker when he worked for the first time inside a steam generator at the Genkai nuclear power plant in southern Japan.

The following post was originally published on December 26th, 2010 and translated with the author's consent:

Here, based simplified, are the chemical reactions in the atmosphere, which explain how the Fukushima disaster impacted the Arctic ozone hole.   The cold winter in 2010-2011 produced dense stratospheric clouds over the Arctic, which due to the presence of water promoted chemical reactions with various gases to produce compounds that deplete ozone over the Arctic Circle.   The Arctic ozone hole, that began expanding due to the clouds, radically widened in March and April, coinciding with the Fukushima disaster.

"Our results show that Arctic ozone holes are possible even with temperatures much milder than those in the Antarctic," it also said.   It is harder for ozone-destroying chlorine monoxide to form in the stratosphere of the Arctic as winter temperatures are higher than in the Antarctic, according to the group.   But the depletion of the ozone layer over the Arctic appears to have progressed greatly this winter to spring because unusually cold temperatures from December through the end of March enhanced ozone-destroying forms of chlorine.   "The 2010-11 Arctic winter-spring was characterized by an anomalously strong stratospheric polar vortex and an atypically long continuously cold period," the team said in the article contributed to Nature.

From the Mainichi newspaper...   Researchers Report Unprecedented Ozone Loss In Arctic   10-3-11   TSUKUBA, Japan (Kyodo) -- The depletion of the Arctic ozone layer reached an unprecedented level in early 2011 and was "comparable to that in the Antarctic," an international research team said Sunday in the online version of the British science magazine Nature.   "For the first time, sufficient loss occurred to reasonably be described as an Arctic ozone hole," said the nine-country team, including Hideaki Nakajima of the National Institute for Environmental Studies in Tsukuba in Ibaraki Prefecture.

TEPCO to conduct endoscopy of Fukushima reactors, NHK, Dec. 26, 2011: Tokyo Electric Power Company says it will use an industrial endoscope to study the inside of a damaged reactor at the Fukushima Nuclear power plant. [...] The firm will start drilling a hole in the northwest wall of the containment vessel at the No. 2 reactor next month so that the high-level radiation proof endoscope can be inserted through it. [...] See also: Ex-Fukushima Worker: Tepco to open up a hole in Reactor No. 2 containment vessel by year's end (VIDEO)

After drilling a hole in the containment vessel of Fukushima reactor 2, Tepco cannot find the fuel. As AP notes: The steam-blurred photos taken by remote control Thursday found none of the reactor’s melted fuel …. The photos also showed inner wall of the container heavily deteriorated after 10 months of exposure to high temperature and humidity, Matsumoto said.

TEPCO workers inserted the endoscope — an industrial version of the kind of endoscope doctors use — through a hole in the beaker-shaped container at the Fukushima Dai-ichi plant’s No. 2 reactor …. The probe failed to find the water surface, which indicate the water sits at lower-than-expected levels inside the primary containment vessel and questions the accuracy of the current water monitors, Matsumoto said.

And while cold shutdown means that the water inside the reactors is below the boiling point, CNN reports: Massive steam and water drops made it difficult to get a clear vision…. Given that steam forms when water boils, this is an indication that the reactor is not in cold shutdow

Ever since the nuclear crisis erupted six months ago, the public has been clamoring to know when the damaged reactors at the Fu ku shi ma No. 1 power plant will be brought under control and when the nightmare will end. The government and Tokyo Electric Power Co., which runs the crippled plant, are working to bring the three reactors into cold shutdown by mid-January.

Cold shutdown means the temperature at the bottom of the pressure vessel, which holds the core, has been lowered to less than 100 degrees. This critical milestone, known as "Step 2" in Tepco's road map for containing the crisis, would limit the release of radioactive materials from the plant to less than 1 millisievert per year, a level that poses no health risks.

Since work at the plant is proceeding relatively smoothly, it appears likely the mid-January target will be met. But Fukushima No. 1 will still have a long way to go before the flooded plant's reactors are stable enough to be considered safe, experts warn. The main reason is the abundance of highly radioactive water.

The Japanese government seems to be "instructing" TEPCO not to release certain information in English.TEPCO submitted the report to its regulatory agency Nuclear and Industrial Safety Agency (NISA) "on the measures to continue water injection into reactors of Units 1 to 3 at Fukushima Daiichi Nuclear Power Station" on August 3. It's in Japanese only, and it may or may not be translated into English.According to TEPCO:We have provided a Japanese press release version of the instruction document received from NISA. However, at this time we have reserved the right not to provide an English version due to potential misunderstandings that may arise from an inaccurate rendering of the original Japanese text. We may provide the English translation that NISA releases in our press releases. However, in principle we would advise you to visit the NISA website for timely and accurate information.(From TEPCO's English press release on August 3 explaining why they are releasing the information only in Japanese.)The 34-page Japanese report is here.

The report talks about the fuel inside the Reactor Pressure Vessels;It talks about the reactors as if they were sound;It states that zirconium will start to interact with water at a certain temperature (1,200 degrees Celsius).

Most likely, there is no fuel left inside the RPVs at Fukushima I Nuke Plant. Even if there is, it is not fuel any more but "corium" - fuel, control rods, instruments, whatever inside the RPV, melted together. TEPCO has already admitted that there are holes in the RPV, and holes in the Containment Vessels. There is no zirconium left because there is no cladding left.

Six months after the accident at Fukushima Daiichi, the news flow from the stricken nuclear power plant has slowed, but scientific studies of radioactive material in the ocean are just beginning to bear fruit.The word from the land is bad enough. As my colleague Hiroko Tabuchi reported on Saturday, Japanese officials have detected elevated radiation levels in rice near the crippled reactors. Worrying radiation levels had already been detected in beef, milk, spinach and tea leaves, leading to recalls and bans on shipments.

Off the coast, the early results indicate that very large amounts of radioactive materials were released, and may still be leaking, and that rather than being spread through the whole ocean, currents are keeping a lot of the material concentrated. Most of that contamination came from attempts to cool the reactors and spent fuel pools, which flushed material from the plant into the ocean, and from direct leaks from the damaged facilities.

Working with a team of scientists from other institutions, including the University of Tokyo and Columbia University, Mr. Buesseler’s Woods Hole group in June spent 15 days in the waters off northeast Japan, studying the levels and dispersion of radioactive substances there and the effect on marine life.The project, financed primarily by the Moore Foundation after governments declined to participate, continued to receive samples from Japanese cruises into July.

The impacts on the ocean of releases of radionuclides from the Fukushima Dai-ichi nuclear power plants remain unclear. However, information has been made public regarding the concentrations of radioactive isotopes of iodine and cesium in ocean water near the discharge point. These data allow us to draw some basic conclusions about the relative levels of radionuclides released which can be compared to prior ocean studies and be used to address dose consequences as discussed by Garnier-Laplace et al. in this journal.(1) The data show peak ocean discharges in early April, one month after the earthquake and a factor of 1000 decrease in the month following. Interestingly, the concentrations through the end of July remain higher than expected implying continued releases from the reactors or other contaminated sources, such as groundwater or coastal sediments. By July, levels of 137Cs are still more than 10 000 times higher than levels measured in 2010 in the coastal waters off Japan. Although some radionuclides are significantly elevated, dose calculations suggest minimal impact on marine biota or humans due to direct exposure in surrounding ocean waters, though considerations for biological uptake and consumption of seafood are discussed and further study is warranted.

there was no large explosive release of core reactor material, so most of the isotopes reported to have spread thus far via atmospheric fallout are primarily the radioactive gases plus fission products such as cesium, which are volatilized at the high temperatures in the reactor core, or during explosions and fires. However, some nonvolatile activation products and fuel rod materials may have been released when the corrosive brines and acidic waters used to cool the reactors interacted with the ruptured fuel rods, carrying radioactive materials into the ground and ocean. The full magnitude of the release has not been well documented, nor is there data on many of the possible isotopes released, but we do have significant information on the concentration of several isotopes of Cs and I in the ocean near the release point which have been publically available since shortly after the accident started.

We present a comparison of selected data made publicly available from a Japanese company and agencies and compare these to prior published radionuclide concentrations in the oceans. The primary sources included TEPCO (Tokyo Electric Power Company), which reported data in regular press releases(3) and are compiled here (Supporting Information Table S1). These TEPCO data were obtained by initially sampling 500 mL surface ocean water from shore and direct counting on high-purity germanium gamma detectors for 15 min at laboratories at the Fukushima Dai-ni NPPs. They reported initially results for 131I (t1/2 = 8.02 days), 134Cs (t1/2 = 2.065 years) and 137Cs (t1/2 = 30.07 years). Data from MEXT (Ministry of Education, Culture, Sports, Science and Technology—Japan) were also released on a public Web site(4) and are based on similar direct counting methods. In general MEXT data were obtained by sampling 2000 mL seawater and direct counting on high-purity germanium gamma detectors for 1 h in a 2 L Marinelli beaker at laboratories in the Japan Atomic Energy Agency. The detection limit of 137Cs measurements are about 20 000 Bq m–3 for TEPCO data and 10 000 Bq m–3 for MEXT data, respectively. These measurements were conducted based on a guideline described by MEXT.(5) Both sources are considered reliable given the common activity ratios and prior studies and expertise evident by several Japanese groups involved in making these measurements. The purpose of these early monitoring activities was out of concern for immediate health effects, and thus were often reported relative to statutory limits adopted by Japanese authorities, and thus not in concentration units (reported as scaling factors above “normal”). Here we convert values from both sources to radionuclide activity units common to prior ocean studies of fallout in the ocean (Bq m–3) for ease of comparison to previously published data.

expected to take more than 30 years to decommission crippled reactors at the Fukushima No. 1 Nuclear Power Plant, and workers tasked with the difficult mission would have to venture into "uncharted territory" filled with hundreds of metric tons of highly radioactive nuclear fuel,

After the expert committee of the Japan Atomic Energy Commission (JAEC) compiled a report on procedures to decommission the No. 1 to 4 reactors at the Fukushima No. 1 Nuclear Power Plant on Dec. 7, the actual work is expected to move into high gear after the turn of the year. As in the case of the 1979 Three Mile Island accident, the workers would try to remove melted nuclear fuel after shielding radiation with water, a technique called a "water tomb." But the work would have to be done in a "territory where humans have not stepped into before," said a senior official of Tokyo Electric Power Co. (TEPCO), the operator of the troubled Fukushima nuclear power station. The work is so difficult that it is expected to take more than 30 years to finish decommissioning the reactors.

Up to about 5,000 millisieverts per hour of radiation -- lethal levels -- have been detected in the reactor building of the No. 1 reactor.

The NRC had declared delays in the new reactor approval process for AP1000 and ESBWR reactor designs. They NRC wants to complete their analysis on information from Fukushima Daiichi before moving ahead with the process to possibly approve either new design. Meanwhile Nuclear power companies are forging ahead with preparing sites for the reactors they hope to build. An interesting twist in that power companies can start a project before getting approval for the reactor they intend to build. This is then frequently used to pressure the NRC because work and spending is already underway. It was a key circumstance during the initial approval process at North Anna.

The Oyster Creek reactor in New Jersey, one of the oldest in the US has announced they will shut down for good in 2019. In 2010 Excelon threatened to close Oyster Creek unless a mandate requiring them to build cooling towers was removed. It appears that the cooling tower issues may have been a major factor in the decision to cease operations.  Containment corrosion and lawsuits over the lack of metals testing on the reactor were mounting against Oyster Creek. The people in the region and the state authorities were all working various angles to shut down the plant due to its many problems. They have succeeded. Now to just hope nothing bad happens at Oyster Creek before 2019.

At Davis Besse in Ohio, as they are replacing the reactor cap that has a pineapple sized hole in it, they discovered a long crack in the containment concrete. They had already sliced a hole in the containment dome to put the replacement reactor cap in. FirstEnergy claims none of this will degrade safety…..

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.

American Energy Fields, Inc. (OTCBB:AEFI), formerly Sienna Resources, Inc. is a uranium exploration and development company based in Arizona. Their focus is uranium deposits in the United States. The Company’s three main projects (in which they have sole interest) are  the Coso and Blythe  projects in California, and Artillery Peak project in Arizona. All three properties have been previously explored and developed, and are currently in early exploration stages.  A 43-101 technical report for the Artillery Peak project is available for review on American Energy Field’s website. What we like about American Energy Fields, Inc: Over 9.2 million pounds U3O8 historic resources with 2.8 million pounds 43-101 verified More than $25 million in development work, by past operators, has been spent on AEFI’s current projects Committed to near term production of low cost U.S. Uranium

The Artillery Peak property consists of 1,777 acres of federal land and is located 112 miles northeast of Phoenix, Arizona. American Energy Fields’ historic records indicate 1.7 million pounds of uranium was previously identified through exploration on Artillery Peak. There has been significant exploration work completed on the property, including over 400 holes drilled by Jacquays Mining, Homestake Mining, Hecla Mining, Getty Oil, Public Service Company of Oklahoma, and Santa Fe Mining between the 1950s-1970s. A 1979 report by Central and South West Fuels, Inc. found that the northern portion of the property contains a historical resource of 1.7 million pounds U3O8 with an average grade of 0.113%. In 2007/2008 new exploration was conducted which included 34 additional drill holes to verify historic drilling and further delineate mineralization. In 1979, the Department of Energy conducted an evaluation of the Date Creek Basin and the Artillery Mountains where they estimated that the area could contain as much as 1,260,000,000 pounds of U3O8. The Company will begin a preliminary exploration program to verify the historic data reported by Central and South West Fuels Inc.

Coso – Inyo County – California The Coso project covers 169 federal mining claims and 800 state-owned acres and was previously developed by Western Nuclear, Pioneer Resources, Federal Resources, and Union Pacific Mining/Rocky Mountain Energy. An estimated U.S. $20,000,000.00 was spent on exploration and development of the project, including an engineered pit design, where exploration records indicate 5.5 million lbs. of uranium was identified with an average grade of 0.07 U3O8. American Energy Fields recently received its exploration permit for the 800 state-owned acres from the California Land Department and is currently developing an exploration plan to confirm the historic data with the goal of moving the project towards production. Blythe – Riverside County – California The Blythe project consists of 66 Federal mining claims in Riverside County, California covering 3 historic mines, the Safranek, the McCoy Wash, and the Little Ore Hill operated by Humbug Mining and Bokum Corporation. According to Bokum’s records during the years of 1963 to 1964, the Safranek Mine produced and shipped 1,400 tons of uranium ore averaging 0.80% U308 to the VCA mill in Salt Lake City, Utah for processing. These records also indicate the Safranek site currently contains 100 tons at 0.40% U3O8 and 4,000 tons at 0.30% U3O8 of stockpiled ore, while the McCoy Wash has 3,000 tons of stockpiled ore with a grade of 0.20% U3O8. Bokum Corporation drilled the property in the early 1970s and the results indicated approximately 153,000 lbs of U3O8 while outlining a further potential for an additional 2,000,000 lbs of U3O8. American Energy Fields aims to identify, expand, and develop the ore body with the goal of putting the past producing mines back into production. Management

Radioactive material from the Fukushima nuclear disaster has been found in tiny sea creatures and ocean water some 186 miles (300 kilometers) off the coast of Japan, revealing the extent of the release and the direction pollutants might take in a future environmental disaster. In some places, the researchers from Woods Hole Oceanographic Institution (WHOI) discovered cesium radiation hundreds to thousands of times higher than would be expected naturally, with ocean eddies and larger currents both guiding the " radioactive debris " and concentrating it.

With these results, detailed Monday in the journal Proceedings of the National Academy of Sciences, the team estimates it will take at least a year or two for the radioactive material released at Fukushima to get across the Pacific Ocean. And that information is useful when looking at all the other pollutants and debris released as a result of the tsunami that destroyed towns up and down the eastern coast of Japan.

TONY EASTLEY: Still in Japan and the ABC has obtained documents revealing the lengths being taken to keep work at the crippled Fukushima nuclear plant secret and to stop workers there from actually talking to the media.One former worker at the plant has told the ABC how they were given sub-standard protective gear after the accidents.North Asia correspondent Mark Willacy reports from Iwaki City in Fukushima.MARK WILLACY: Inside the leeching and twisted remains of the Fukushima nuclear plant 3000 workers are labouring to stabilise the melted reactor cores.It's dirty and dangerous work, and some workers claim they're being exposed and exploited.

: "I was not told how much radiation I would be exposed to or how high the radiation would be," says this man who worked at the Fukushima plant during the meltdowns. "They just gave me an anorak to wear and sent me to work. I worked at installing vents inside the reactor buildings to get rid of the steam so we could avert another explosion," he tells me.There's a good reason why this Fukushima worker doesn't want his identity revealed and that's because like others, he's been gagged.The ABC has obtained a document drawn up by one of the Fukushima subcontractors. It demands that its employees at the plant keep all of their work secret and under no circumstances are they permitted to talk to the media.

But that hasn't stopped Hiroyuki Watanabe from snooping about

Why did such massive amounts of radioactive substances escape from the crippled Fukushima No. 1 nuclear power plant? Why did explosions tear through its reactor buildings? Tokyo Electric Power Co.'s interim report on the accident at the nuclear plant shed some light on some causes of the nation's worst-ever nuclear crisis, but these and other crucial questions remain unanswered. The release of radioactive substances is believed to have peaked on the morning of March 15. As radiation spewed from the plant's reactors, residents in an extensive area--even as far as Iitatemura, Fukushima Prefecture, about 30 kilometers from the plant--were forced to evacuate.

The report said the air pressure in the containment vessel of the plant's No. 2 reactor dropped drastically that morning. However, TEPCO says the causal relationship between the pressure drop and the radioactive release is "unclear at this moment." It had been assumed that a blast in the pressure control chamber below the No. 2 reactor's containment vessel caused the increase in radiation leaked into the environment. Analysis of data from a seismometer and other equipment at the complex later showed this hypothesis was incorrect.

The report's verification of TEPCO's initial response to the nuclear accident also lacked details. After a hydrogen blast wrecked the No. 1 reactor building shortly after 3:30 p.m. on March 12--a development nobody had anticipated--TEPCO scrambled to prevent similar blasts from occurring at the other reactors.

A whistle-blower of Tepco leaked the actual situation of Fukushima plant. He left his comments on a Japanese forum. Here are the messages.

Boring survey around reactor 2 is coming to the climax. As a result, the announcement of the government and Tepco has to be denied. If it’s soft material, they can do horizontal boring with such a weak equipment (like the top picture ) but when it comes to the concrete of the reactor building it’s impossible. They need to do boring with a foreign heavy equipment at an angle. They do boring to reach to under the container vessel. (like the bottom 2 pictures)

When they do boring where they don’t need to take a sample they drill roughly with this green rotary diamond bit but the dust is lethal because it’s too radioactive. When they need to take a sample, they change the diamond bit to hole saw type of bit. However, diamond is weak for the heat so when it’s hotter than 500℃ they use the standard type of the tungsten carbide instead.    The bottom 3 pictures are the samples taken.

Preparations are under way to use an endoscope to examine the inside of a containment vessel of the damaged No. 2 reactor at the Fukushima Daiichi nuclear power plant. At the No.1, 2, and 3 reactors of the plant, the nuclear fuel has melted down, but the exact state of the fuel and details of the inside of the containment vessels are yet to be confirmed. This is causing a big problem for the operator, Tokyo Electric Power Company, in its continued efforts to stabilize the cooling of the reactors and its plans to decommission them. The reactors were damaged by the March 11th earthquake and tsunami.

On Tuesday, 10 groups of 4 workers each entered the first floor of the No.2 reactor building from the northwestern side. The workers drilled a hole in the containment vessel to insert an endoscope. An industrial endoscope that can withstand high levels of radiation will be used. The utility says the workers were exposed to up to 3 millisieverts of radiation. The company says the workers had rehearsed the job at the No. 5 reactor, the same type as the No.2, in order to minimize their exposure.

TEPCO says Tuesday's operation went smoothly and it will insert the endoscope on Thursday as scheduled. It hopes to gain the first internal view of one of the damaged reactors since the accident.

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.”