Tag Archives: Fukushima nuclear waste

Forever Fukushima: Cleaning Up the Huge Mess

By the end of 2019, Japan further delayed the removal of thousands of spent fuel units that remain in cooling pools since the 2011 disaster The government and the plant operator, Tokyo Electric Power Co., are keeping a 30- to 40-year completion target.

More than 4,700 units of fuel rods remain at the three melted reactors and two others that survived the 2011 earthquake and tsunami. They pose a high risk because their storage pools are uncovered and a loss of water in case of another major disaster could cause the fuel rods to melt, releasing massive radiation. Their removal at Units 1 and 2, after repeated delays, is now postponed by up to 10 years from the initial target of 2018, with more preparation needed to reduce radiation and clear debris and other risks.

Fuel rod removal at the Unit 1 reactor pool will begin sometime in 2027-2028, after debris is cleaned up and a huge rooftop cover installed to contain radioactive dust. Fuel removal at Unit 2 pool is to begin in 2024-2026. Work at the Unit 3 reactor pool began in April 2019 and all 566 units will be removed by March 2021. TEPCO has emptied the pool at Unit 4, which was offline and only suffered building damage, and aims to have all remaining rods in reactor pools removed by 2031 for safer storage in dry casks.

TEPCO has been unable to release the 1.2 million tons of treated but still radioactive water kept in nearly 1,000 tanks at the plant, fearing public repercussions and the impact on the area’s struggling fishing and agriculture. The amount of water is growing by 170 tons daily because it is used to cool the melted fuel inside the reactors.

The Ministry of Economy, Trade and Industry recently drafted a proposal to release the water to the sea or the air, or a combination of both. TEPCO says it can only store up to 1.37 million tons, or until the summer of 2022. Time is limited because preparation is needed before any water release. TEPCO and the government say the tanks pose risks if they were to spill their contents in another major earthquake, tsunami or flood…. The water is still somewhat contaminated, but TEPCO says further treatment can remove all but radioactive tritium to levels allowed for release. Experts say tritium is not harmful to humans in small amounts and has been routinely released from nuclear plants around the world.

Removing an estimated 880 tons of molten fuel from Fukushima’s three melted reactors is the toughest and unprecedented challenge. It’s six times the amount dealt with in the aftermath of the 1979 Three Mile Island partial core melt in the United States.  Removal is to begin in 2021 at Unit 2, where robotic probes have made more progress than at Units 1 and 3. A robotic arm was developed to enter the reactor from the side to reach the melted fuel, which has largely fallen to the bottom of the primary containment vessel… The first decade through 2031 is a crucial phase that will affect future progress…

Japan has yet to develop a plan to dispose of the highly radioactive melted fuel and other debris that come out of the reactors. TEPCO will compile a plan for those after the first decade of melted fuel removal. Managing the waste will require new technologies to reduce its volume and toxicity. TEPCO and the government say they plan to build a site to store waste and debris removed from the reactors, but finding one and obtaining public consent will be difficult.

Additionally, there will be an estimated 770,000 tons of solid radioactive waste by 2030, including contaminated debris and soil, sludge from water treatment, scrapped tanks and other waste. They will be sorted, treated and compacted for safe storage under a plan to be compiled by 2028.

The government says Fukushima’s decommissioning cost is estimated at 8 trillion yen ($73 billion), though adding compensation, decontamination of surrounding areas and medium-term storage facilities would bring the total to an estimated 22 trillion yen ($200 billion). The Japan Center for Economic Research, a think tank, estimates that decommissioning alone would cost 51 trillion yen ($470 billion) if the water is not released and tritium removal technology is pursued.

More than 10,000 workers will be needed annually in coming years, about one third assigned to work related to the radioactive water. 

Excerpts from MARI YAMAGUCHI,  Japan revises Fukushima cleanup plan, delays key steps, Associated Press, Dec. 27, 2019

A Huge Headache: the Radioactive Water at Fukushima

What to do with the enormous amount of radioactive  water, which grows by around 150 tons a day at Fukushima, is a thorny question, with controversy surrounding a long-standing proposal to discharge it into the sea, after extensive decontamination.  The water comes from several different sources: Some is used for cooling at the plant, which suffered a meltdown after it was hit by a tsunami triggered by a massive earthquake in March 2011.  Groundwater that seeps into the plant daily, along with rainwater, add to the problem.

A thousand, towering tanks have now replaced many of the cherry trees that once dotted the plant’s ground. Each can hold 1,200 tons, and most of them are already full.  “We will build more on the site until the end of 2020, and we think all the tanks will be full by around the summer of 2022,” said Junichi Matsumoto, an official with the unit of plant operator TEPCO in charge of dismantling the site.

TEPCO has been struggling with the problem for years, taking various measures to limit the amount of groundwater entering the site.  There is also an extensive pumping and filtration system, that each day brings up tons of newly contaminated water and filters out as many of the radioactive elements as possible.

The hangar where the decontamination system runs is designated “Zone Y” — a danger zone requiring special protections.  All those entering must wear elaborate protection: a full body suit, three layers of socks, three layers of gloves, a double cap topped by a helmet, a vest with a pocket carrying a dosimeter, a full-face respirator mask and special shoes.  Most of the outfit has to burned after use.

“The machinery filters contain radionuclides, so you have to be very protected here, just like with the buildings where the reactors are,” explained TEPCO risk communicator Katsutoshi Oyama.  TEPCO has been filtering newly contaminated water for years, but much of it needs to go through the process again because early versions of the filtration process did not fully remove some dangerous radioactive elements, including strontium 90.

The current process is more effective, removing or reducing around 60 radionuclides to levels accepted by the International Atomic Energy Agency (IAEA) for water being discharged.  But there is one that remains, which cannot be removed with the current technology: tritium.

Tritium is naturally present in the environment, and has also been discharged in its artificial form into the environment by the nuclear industry around the world.  There is little evidence that it causes harm to humans except in very high concentrations and the IAEA argues that properly filtered Fukushima water could be diluted with seawater and then safely released into the ocean without causing environmental problems.

But those assurances are of little comfort to many in the region, particularly Fukushima’s fishing industry which, like local farmers, has suffered from the outside perception that food from the region is unsafe.

Karyn Nishimura, At Fukushima plant, a million-ton headache: radioactive water, Japan Times, Oct. 7, 2019
 

Where to Go? 1 Million Tons Radioactive Water at Fukushima

In August 2019, Tepco projected that storage of radioactive water at the Fukushima nuclear plant would reach full capacity by around summer 2022 even after the expansion — the first time it has issued such a precise estimate.  According to Tepco, the Fukushima No. 1 plant had 960 massive tanks containing 1.15 million tons of treated water as of July 18, 2019. Water that has touched the highly radioactive melted fuel debris has been cleaned up through water treatment machines and is stored in the tanks, but the high-tech treatment machines are able to remove most radionuclides except tritium. The plant currently sees an increase of contaminated water by 170 tons a day, Tepco says.

Releasing tritium-tainted water into the sea in a controlled manner is common practice at nuclear power plants around the world, and it was generally considered the most viable option as it could be done quickly and would cost the least.  The head of the Nuclear Regulation Authority, Toyoshi Fuketa, has long said that releasing the treated water into the sea is the most reasonable option, but people in Fukushima, especially fishermen, fear it will damage the region’s reputation.

Addressing those concerns, the government panel, launched in November 2016, has been looking for the best option in terms of guarding against reputational damage. Injecting it into the ground, discharging it as steam or hydrogen, or solidification followed by underground burial have all been on the table. Under the current plan, Tepco is set to increase the tank space to store 1.37 million tons of water a total, but estimates show that will only last until summer 2022.  But the more space it creates, the bigger the decommissioning headache becomes.

Excerpts from KAZUAKI NAGAT, Fukushima nuclear plant to run out of tanks to store tritium-laced water in three years, Tepco says, Japan Times, Aug. 9, 2019
BY KAZUAKI NAGATA

Never-Ending CleanUp: Fukushima

 The operator of Japan’s wrecked Fukushima nuclear plant completed in April 2019 the removal of the first fuel rods from a cooling pool high up in a badly damaged reactor building, a rare success in the often fraught battle to control the site.  The batch of 22 unused fuel assemblies, which each contain 50-70 of the fuel rods, was transferred by a trailer to a safer storage pool, the last day of a four-day operation, Tokyo Electric Power Co, or Tepco, said in a statement.

The company must carefully pluck more than 1,500 brittle and potentially damaged assemblies from the unstable reactor No.4., the early stages of a decommissioning process following the 2011 earthquake and tsunami that wrecked the site.

Tepco estimates removing the damaged assemblies from reactor No.4 alone will take a year. Some experts say that timeline is ambitious.  Still, it is an urgent operation. They are being stored 18 meters (59 feet) above ground level in a building that has buckled and tilted and could collapse if another quake strikes.  Carefully plucking the damaged fuel assemblies from the reactor building is being seen as a test of Tepco’s ability to move ahead with decommissioning the whole facility – a task likely to cost tens of billions of dollars and take decades.  The removal has to be conducted under water. If the rods are exposed to air or if they break, huge amounts of radioactive gases could be released into the atmosphere. Each assembly weighs around 300 kg (660 pounds) and is 4.5 meters (15 feet) long.  The hazardous removal operation has been likened by Arnie Gundersen, a veteran U.S. nuclear engineer and director of Fairewinds Energy Education, to trying to pull cigarettes from a crushed pack

Exerpts from In Start of Long Operation, Fukushima Removes First Fuel Rods, Reuters, April 2019

What to Do with Radioactive Pools

More than 60,000 tons of highly radioactive spent nuclear fuel is stored on the shores of four of the five Great Lakes at the Border between United States and Canada — in some cases, mere yards from the waterline — in still-growing stockpiles…It remains on the shorelines because there’s still nowhere else to put it…

The nuclear power industry and its federal regulator, the U.S. Nuclear Regulatory Commission, point to spent nuclear fuel’s safe on-site storage over decades. But the remote possibility of a worst-case scenario release — from a natural disaster, a major accident, or an act of terrorism — could cause unthinkable consequences for the Great Lakes region.   Scientific research has shown a radioactive cloud from a spent fuel pool fire would span hundreds of miles, and force the evacuation of millions of residents in Detroit, Chicago, Cleveland, Toronto or other population centers, depending on where the accident occurred and wind patterns.

For five years, Michigan residents, lawmakers, environmental groups and others around the Midwest have, loudly and nearly unanimously, opposed a planned Canadian underground repository for low-to-medium radioactive waste at Kincardine, Ontario, near the shores of Lake Huron. Meanwhile, spent nuclear fuel, vastly more radioactive, sits not far from the shores of  four Great Lakes — Michigan, Huron, Erie and Ontario — at 15 currently operating or former nuclear power plant sites on the U.S. side. In Michigan, that includes Fermi 2; the Donald C. Cook nuclear plant in Berrien County; the Palisades nuclear plant in Van Buren County, and the former Big Rock Point nuclear plant in Charlevoix County, which ceased operation in 1997 and where now only casks of spent nuclear fuel remain.

Neither the U.S. nor the Canadian government has constructed a central collection site for the spent nuclear fuel. It’s not just a problem in the Great Lakes region — more than 88,000 tons of spent nuclear fuel, an amount that is rising, is stored at 121 U.S. locations across 39 states.

Spent nuclear fuel isn’t only radioactive, it continues to generate heat. It requires storage in pools with circulating water for typically five years before it can be moved into so-called dry-cask storage — concrete-and-steel obelisks where spent fuel rods receive continued cooling by circulating air.In practice, however, because of the high costs associated with transferring waste from wet pools to dry casks, nuclear plants have kept decades worth of spent fuel in wet storage. Plant officials instead “re-rack” the pools, reconfiguring them to add more and more spent fuel, well beyond the capacities for which the pools were originally designed.

Only in recent years have nuclear plants stepped up the transition to dry cask storage because there’s no room left in the wet pools. Still, about two-thirds of on-site spent nuclear fuel remains in wet pools in the U.S….That’s a safety concern, critics contend. A catastrophe or act of terrorism that drains a spent fuel pool could cause rising temperatures that could eventually cause zirconium cladding — special brackets that hold the spent fuel rods in bundles — to catch fire.  Such a disaster could be worse than a meltdown in a nuclear reactor, as spent nuclear fuel is typically stored with nowhere near the fortified containment of a reactor core.

At Fukushima…what almost happened — at the plant’s Unit 4 spent-fuel pool that gives nuclear watchdogs nightmares.  A hydrogen explosion four days into the disaster left the building housing the Unit 4 spent-fuel pool in ruins. The pool was seven stories up in a crumbling, inaccessible building.  It “was so radioactive, you couldn’t put people up there,” von Hippel said. “For about a month after Fukushima, people didn’t know how much water was in the pool. They were shooting water up there haphazardly with a hose, trying to drop it by helicopter.”  Two weeks after the earthquake and tsunami, the Japanese Atomic Energy Commission secretly conducted a worst-case scenario study of the ongoing disaster. The biggest fear that emerged: that a self-sustaining fire would start in the Unit 4 spent fuel pool, spreading to the nearby, damaged reactors. That, they found, would release radiation requiring evacuations as far away as 150 miles, to the outskirts of Tokyo and its more than 13.4 million residents. “That was the devil’s scenario that was on my mind,” Chief Cabinet Secretary Yukio Edano said during a special commission’s 2014 investigation of the accident.“Common sense dictated that, if that came to pass, then it was the end of Tokyo.”   What kept the spent fuel rods covered with water in Unit 4 was a miraculous twist of fate: The explosion had jarred open a gate that typically separated the Unit 4 spent fuel pool from an adjacent reactor pool.  “Leakage through the gate seals was essential for keeping the fuel in the Unit 4 pool covered with water,” a 2016 report on the Fukushima accident by the U.S. National Academies of Sciences, Engineering and Medicine concluded. “Had there been no water in the reactor well, there could well have been severe damage to the stored fuel and substantial releases of radioactive material to the environment.”

The U.S. nuclear industry sees Fukushima differently — in some ways as a success story.  “At Fukushima, you not only had a tsunami, you blew up the buildings … and you still did not drain the pool,” said Rod McCullum, senior director for fuel and decommissioning at the Nuclear Energy Institute, the trade association for nuclear utilities in the U.S.  “Those pools and those casks withstood explosions and earthquakes and tsunamis, all on the same day.”  A scenario where a fire can occur by the draining of water from a spent-fuel pool “has never been demonstrated,” McCullum said. He noted safety measures added in the U.S. since Fukushima include the ability to provide extra pumps and water supplies, in minutes or hours, should a spent fuel pool become breached and lose water — even if the disaster required that the resources be brought in by air from farther away….

Because nuclear power is much more widely used in Canada — the province of Ontario alone has 20 nuclear reactors at three plants — it also generates much more nuclear waste.  In Ontario, nearly 52,000 tons of spent nuclear fuel is stored on-site at nuclear plants along Lakes Huron and Ontario.“There’s a huge amount of high-level, radioactive waste stored right along the water,” said Edwards, the president of the nonprofit Canadian Coalition for Nuclear Responsibility  Like the U.S., Canada is seeking a long-term storage solution that will involve a central underground repository. Unlike the U.S., the Canadian government is seeking willing hosts, promising jobs and economic activity. …Even if a central repository is one day approved, another complication arises — how to get two generations of the most dangerous industrial waste man has ever created from sites all over the country to one point….

Germany, in the 1980s, tried using an abandoned salt and potash mine to store barrels of nuclear waste over 30 years, the Asse II mine.  It’s now prompting a cleanup that may take 30 years and cost nearly $12 billion U.S. dollars. The government has disputed the contention of workers at the mine that they were exposed to excessive levels of radiation, causing an unusual number of cancers….Nuclear power is projected to drop as a percentage of the world’s power generation mix from 10 percent in 2017 to just 5.6 percent by 2050, a report issued by the International Atomic Energy Agency this summer found…

If central repository solutions aren’t found, within years, the re-licensing of some early dry-cask storage facilities will come into play, as they meet a lifespan they were never expected to reach. “The age of nuclear power is winding down, but the age of nuclear waste is just beginning,” Edwards said.

Excerpts from Keith Matheny, 60,000 tons of dangerous radioactive waste sits on Great Lakes shores, Detroit Free Press, Oct. 19, 2018

Fukushima in 2018: Radioactive Mud

Radioactive cesium from the crippled Fukushima No. 1 nuclear power plant continued to flow into Tokyo Bay for five years after the disaster unfolded in March 2011, according to a researcher.  Hideo Yamazaki, a former professor of environmental analysis at Kindai University, led the study on hazardous materials that spewed from the nuclear plant after it was hit by the Great East Japan Earthquake and tsunami on March 11, 2011.

Five months after disaster caused the triple meltdown at the plant, Yamazaki detected 20,100 becquerels of cesium per square meter in mud collected at the mouth of the Kyu-Edogawa river, which empties into Tokyo Bay.  In July 2016, the study team detected a maximum 104,000 becquerels of cesium per square meter from mud collected in the same area of the bay, Yamazaki said.

He said cesium released in the early stages of the Fukushima disaster remained on the ground upstream of the river, such as in Chiba Prefecture. The radioactive substances were eventually washed into the river and carried to Tokyo Bay, where they accumulated in the mud, he said.

On a per kilogram basis, the maximum level of radioactivity of cesium detected in mud that was dried in the July 2016 study was 350 becquerels.  The government says soil with 8,000 becquerels or lower of radioactive cesium per kilogram can be used in road construction and other purposes.  The amount of radioactive cesium in fish in Tokyo remains lower than 100 becquerels per kilogram, the national safety standard for consumption.

Excerpts from  NOBUTARO KAJI,  Cesium from Fukushima flowed to Tokyo Bay for 5 years, June 7, 2018

Nuclear Waste at Fukushima: total amount

Each form of waste at the Fukushima Daiichi Nuclear Power Station, where three reactors melted down after an earthquake and a tsunami on March 11, 2011, presents its own challenges.

400 Tons of Contaminated Water Per Day
The Tokyo Electric Power Company is pumping water nonstop through the three reactors to cool melted fuel that remains too hot and radioactive to remove. About 400 tons of water pass through the reactors every day, including groundwater that seeps in. The water picks up radiation in the reactors and then is diverted into a decontamination facility.  But the decontamination filters cannot remove all the radioactive material. So for now, all this water is being stored in 1,000 gray, blue and white tanks on the grounds. The tanks already hold 962,000 tons of contaminated water, and Tokyo Electric is installing more tanks. It is also trying to slow the flow of groundwater through the reactors by building an underground ice wall.

Within a few years, though, and no one is sure exactly when, the plant may run out of room to store the contaminated water. “We cannot continue to build tanks forever,” said Shigenori Hata, an official at the Ministry of Economy, Trade and Industry.  The authorities are debating whether it might be acceptable, given the relatively low radioactive levels in the water, to dilute the contaminated water and then dump it into the ocean. But local fishermen are vehemently opposed. Many people still do not trust Tokyo Electric because of its bungled response to the disaster, the worst nuclear accident since Chernobyl.

3,519 Containers of Radioactive Sludge
The process of decontaminating the water leaves radioactive sludge trapped in filters, which are being held in thousands of containers of different sizes.Tokyo Electric says it cannot quantify the amount of radioactive sludge being generated. But it says it is experimenting with what to do with it, including mixing it with cement or iron. Then it will have to decide how to store it.

64,700 Cubic Meters of Discarded Protective Clothing
The estimated 6,000 cleanup workers at the site put on new protective gear every day. These hazmat suits, face masks, rubber gloves and shoe coverings are thrown out at the end of each shift. The clothing is compressed and stored in 1,000 steel boxes stacked around the site.To date, more than 64,700 cubic meters of gear has been discarded, the equivalent of 17 million one-gallon containers. Tokyo Electric says it will eventually incinerate all this contaminated clothing to reduce the space needed to store it.

Branches and Logs From 220 Acres of Deforested Land
The plant’s grounds were once dotted with trees, and a portion was even designated as a bird sanctuary. But workers have cleared about 220 acres of trees since the meltdown spewed radiation over them.Now, piles of branches and tree trunks are stacked all over the site. Officials say there are about 80,000 cubic meters of this waste, and all of it will have to be incinerated and stored someday.

200,400 Cubic Meters of Radioactive Rubble
Explosions during the meltdown filled the reactors with rubble. Workers and robots are slowly and carefully trying to remove this tangled mass of crushed concrete, pipes, hoses and metal.  Tokyo Electric estimates that more than 200,400 cubic meters of rubble — all of it radioactive — have been removed so far and stored in custom-made steel boxes. That is the equivalent of about 3,000 standard 40-foot shipping containers.

3.5 Billion Gallons of Soil

Thousands of plastic garbage bags sit in neat rows in the fields and abandoned towns surrounding the Fukushima plant. They contain soil that was scraped from land that was exposed to radiation in the days after the accident.  Japan’s Ministry of the Environment estimates that it has bagged 3.5 billion gallons of soil, and plans to collect much more. It will eventually incinerate some of the soil, but that will only reduce the volume of the radioactive waste, not eliminate it.  The ministry has already begun building a massive, interim storage facility in Fukushima prefecture and negotiating with 2,360 landowners for the thousands of acres needed to complete it. And that is not even a long-term solution: The government says that after 30 years it will need another site — or sites — to store radioactive waste.

1,573 Nuclear Fuel Rods
The ultimate goal of the cleanup is to cool and, if possible, remove the uranium and plutonium fuel that was inside the three reactors at the time of the disaster.  Hundreds of spent fuel rods are in cooling pools inside the reactors, and the company hopes to have cleared away enough rubble to begin removing them next year. The much bigger challenge will be removing the fuel that was in use in the reactor core at the time of the meltdown.

The condition and location of this molten fuel debris are still largely unknown. In one reactor where a robot was sent in January, much of the melted fuel is believed to have burned through the bottom of the inner reactor vessel and burrowed into the thick concrete foundation of the containment structure.  The plan is to completely seal the containment vessels, fill them with water and use robots to find and remove the molten fuel debris. But the rubble, the lethal levels of radiation and the risk of letting radiation escape make this an exceedingly difficult task.

In January 2017, the robot sent into one of the reactors discovered radiation levels high enough to kill a person in less than a minute. Another had to be abandoned last month after debris blocked its path and radiation disabled it.

Tokyo Electric hopes to begin removing fuel debris from the reactor cores in 2021. The entire effort could take decades. Some say the radioactive material may prove impossible to remove safely and have suggested leaving it and entombing Fukushima under a concrete and steel sarcophagus like the one used at Chernobyl.

But the Japanese government and Tokyo Electric say they are committed to removing all the waste and cleaning the site, estimated at a cost of $188.6 billion.

Excerpts from MOTOKO RICH, Struggling With Japan’s Nuclear Waste, Six Years After Disaster, Mar. 11, 2017

Fukushima Waste or Trash?

The Chiba Municipal Government of Japan  on June 28, 2016  filed for Environment Ministry approval to lift the radioactive designation for waste stored in the city that was contaminated by the Fukushima reactor meltdowns five years ago.  This marked the first application in Japan seeking to lift the radioactive designation for waste tainted by the 2011 meltdowns at Tokyo Electric Power Company Holdings Inc.’s Fukushima No. 1 nuclear power plant.  The move came after the city found that levels of radioactive materials in the designated waste are lower than the national designation standards of over 8,000 becquerels per kilogram.

At present, designated radioactive waste generated by the nuclear disaster is stored in 12 prefectures in eastern Japan, including Tokyo.

In Chiba, 7.7 tons of designated waste is currently stored at a waste disposal center.The lifting of the designation will allow the city to dispose of the waste the same way as general waste…

Excerpt from Chiba wants radioactive designation lifted from Fukushima-contaminated waste, The Japan Times, June 29, 2016

A Schoolyard at Fukushima

Highly radioactive soil that should by law be removed by the central government has been left dumped in the corner of a schoolyard here because the construction of a local storage site for waste has been stalled.  Students at the school were not given an official warning that the radioactive soil was potentially hazardous to their health.

When a teacher scooped up soil samples at the site and had their radiation levels measured by two nonprofit monitoring entities–one in Fukushima and another in Tokyo–the results showed 27,000-33,000 becquerels of radioactive cesium per kilogram. The law stipulates that the central government is responsible for disposing of waste measuring more than 8,000 becquerels per kilogram. But as a central government project to build an interim storage site for highly radioactive waste near the nuclear power plant has been stalled, the school appears to have no alternative to indefinitely keeping it in the schoolyard…

Radioactive soil turns up at Fukushima high school,The Asahi Shimbun, June 15, 2016

Nothing Outlasts the Fukushima Disaster

As Prime Minister Shinzo Abe moves to reopen Japanese nuclear plants that were all shut after the disaster on March 11, 2011, a distrustful public is pushing back. A court on March 9, 2016ordered Kansai Electric Power Co. to halt two of the four reactors that have been restarted, saying the utility had failed to show the public they were safe. The utility called the ruling “unacceptable” and said it would appeal….However, near the ruined Fukushima reactors……Growing swaths of land are covered with black bags full of slightly radioactive soil.

The hardest parts of the cleanup haven’t even begun. Tepco, as Tokyo Electric is known, has yet to draw up plans for removing highly radioactive nuclear fuel that melted through steel containment vessels and now sits at the bottom of three Fukushima reactors.The company estimates that the nearly $20 billion job of decommissioning the plant could take another three or four decades. That is not counting damages and cleanup costs expected to reach some $100 billion or more, including about $50 billion paid to evacuees. Legal wrangling over the disaster continues. In February 2016, three former Tepco executives were charged with professional negligence.

Tepco also is working to reduce a total 400 tons of rain and groundwater that breach the plant’s defenses daily, becoming contaminated and requiring treatment and storage. But a wall of frozen earth meant to reduce the flow has run into resistance from regulators.On large parts of the site, workers can now walk around without full-face shields or hazmat suits, using simple surgical masks for protection.Fukushima was once a prized post for elite engineers and technicians in Japan’s nuclear heyday. Now, unskilled laborers make up the bulk of a workforce of about 6,000 workers, down from a peak of 7,450 in 2014. “There’s a constant stream of people who can’t find work elsewhere,” said Hiroyuki Watanabe, a Communist city councilman in Iwaki, about 30 miles away. “They drift and collect in Fukushima.”…

Looking ahead, the biggest issue remains the reactors. No one knows exactly where the molten nuclear debris sits or how to clean it. Humans couldn’t survive a journey inside the containment vessels, so Tepco hopes to use robots guided by computer simulations and video images. But two attempts had to be abandoned after the robots got tripped up on rubble.“The nature of debris may depend on when the nuclear fuel and concrete reacted,” said Pascal Piluso, an official of France’s Alternative Energies and Atomic Energy Commission. “We are talking about extremely varied and complex debris.”….A government panel recently questioned Tepco’s ability to tackle the daunting task of decommissioning while seeking profit for its shareholders. The disaster nearly pushed the company to bankruptcy, prompting the government to buoy it with ¥1 trillion ($9 billion  (really????) in public money and pledge government grants and guarantees to help Tepco compensate victims.”…

Excerpts  from Fukushima Still Rattles Japan, Five Years After Nuclear Disaster, Wall Street Journal, Mar. 8, 2016

Land for Nuclear Waste – Fukushima

The March 11, 2011 earthquake and subsequent tsunami tore through coastal towns in northern Japan and set off meltdowns at Tokyo Electric Power’s Fukushima Daiichi plant, which sits partly in Okuma.  Japan has since allocated more than $15 billion to an unprecedented project to lower radiation in towns around the plant, such as Okuma. Every day across Fukushima prefecture, teams of workers blast roads with water, scrub down houses, cut branches and scrape contaminated soil off farmland.  That irradiated trash now sits in blue and black plastic sacks across Fukushima, piled up in abandoned rice paddies, parking lots and even residents’ backyards.  Japan plans to build a more permanent storage facility over the coming years in Okuma and Futaba, another now-abandoned town close to the Fukushima nuclear plant – over the opposition of some local residents.

“This land has our blood and sweat running through it and I can’t just let go of it like that,” said Koji Monma, 60, an Okuma resident who heads a local landowners’ group.  Fukushima’s governor agreed to take the waste facility after Tokyo said it would provide $2.5 billion in subsidies, and promised to take the waste out of the prefecture after 30 years. Mayors of Futaba and Okuma have since agreed to host the 16 square km (6.2 square mile) facility – about five times the size of New York’s Central Park – which will wrap around the Fukushima plant and house multiple incinerators.

Some 2,300 residents who own plots of land in Futaba and Okuma which the government needs for the waste plant face what many describe as an impossible choice...Distrust of government promises runs deep among residents here. …

The ministry has hired around 140 real estate representatives to negotiate land sales with individual owners.

Excerpts from BY MARI SAITO, Fukushima residents torn over nuclear waste storage plan, Reuters, Mar. 9, 2014

70 000 Nuclear Refugees: Fukushima

The first three of Fukushima Dai-ichi’s six reactors melted down in March 2011 and the fourth was damaged. TEPCO’s early guess was that decommissioning would take 30-40 years. That is certainly optimistic.

Engineers are grappling with problems with little precedent. Akira Ono, the plant manager, says cameras have begun peeking into the first reactor to check the state of 100 tonnes of molten fuel. A robot needs to be developed to extract the fuel. Last October the utility pushed back the start of this removal work by five years, to 2025. Dale Klein, a former chairman of America’s Nuclear Regulatory Commission, says that the schedule for decommissioning the plant is pure supposition until engineers figure out how to remove all the fuel.

One victory for engineers is with reactor four. Late last year the last of 1,535 highly toxic fuel rods was plucked from the spent-fuel pool a year ahead of schedule. The fear was that the complex could not withstand another strong earthquake.  Solutions create new problems. Water is pumped in to keep melted uranium at the bottom of reactors one, two and three from overheating. A purification system, known on-site as the “seven samurai”, is struggling to keep up with the flow of contaminated water being produced—370,000 tonnes and rising is stored in vast tanks. Even when the worst nuclides are filtered out, TEPCO will face huge opposition with plans to dump the water into the Pacific.

Then there is the ice wall. TEPCO is attempting to freeze the ground in a huge ring around the four damaged reactors to prevent toxins from reaching the groundwater and flowing into the sea. Workers have dug vast holes and filled them with coolant. In May they will begin refrigerating the coolant to up to -40ºC. Whether the wall can take another big earthquake or work in the baking summer is not proven. The cost for this so far: ¥32 billion ($272m).

Meanwhile, a lower-tech clean-up is taking place beyond the Dai-ichi site over a big swathe of Fukushima’s rolling countryside. Armed with Geiger counters, men in mechanical diggers or with shovels are skimming off contaminated soil. Once the land is clean, at least some residents have a hope of returning home—71,000 nuclear refugees remain in temporary housing. But it could take years.

The price tag for the whole clean-up is as uncertain as its duration. For one, decontamination costs depend on lowering annual radiation to 1 millisievert, a goal now widely seen as unrealistic, says Tatsujiro Suzuki, a former vice-chairman of the Japan Atomic Energy Commission.

TEPCO says decommissioning Dai-ichi’s four damaged reactors will cost ¥980 billion, but that does not include the clean-up, fuel storage or compensation. On a broader reckoning, the Japan Centre for Economic Research, a private research institute, puts the bill over the next decade at ¥5.7 trillion-¥20 trillion, but that still excludes compensation to the fisheries and farming industries. A still broader calculation by the same institute puts the entire cost of the disaster at ¥40 trillion-¥50 trillion. Thanks to government bail-outs, the company that so mismanaged Fukushima Dai-ichi carries on. It even says it will make a profit this year.

Fukushima Daiichi: Mission impossible, Economist, Feb.7, 2015, at 36

Fukushima Mess – Radioactive Water

The [Japanese] government picked three overseas companies to participate in a subsidized project to determine the best available technology for separating radioactive tritium from the toxic water building up at the Fukushima No. 1 nuclear plant.  Tokyo Electric Power Co. is currently test-running a system it says is capable of removing 62 types of radioactive substances from the contaminated water, but not tritium.  Thus tritium-laced water is expected to accumulate at the plant in the absence of any method to remove the isotope.

The three firms chosen from 29 applicants are U.S. firm Kurion Inc., which offers technologies to treat nuclear and hazardous waste; GE Hitachi Nuclear Energy Canada Inc., a joint venture of Hitachi Ltd. and U.S. firm General Electric Co.; and Federal State Unitary Enterprise RosRAO, a Russian radioactive waste management firm.

The government will provide up to ¥1 billion for each examination of the technologies and running costs, and consider whether any of them can be applied to treat the water at Fukushima No. 1, the industry ministry said.  The three companies are to conclude their experiments by the end of March 2016, a ministry official said.  The official cautioned there is no guarantee that any of the technologies will be put to practical use.

Three firms picked to help tackle toxic water at Fukushima No. 1, Japan Times, Aug. 26, 2014

In January 2014 it was made public that a total of 875 terabecquerels (2.45 g) of tritium are on the site of Fukushima Daiichi,and the amount of tritium contained in the contaminated water is increasing by approximately 230 terabecquerel (0.64 g) per year. According to a report by Tepco “Tritium could be separated theoretically, but there is no practical separation technology on an industrial scale.”  See Wikipedia

Interim Disposal of Fukushima Nuclear Waste

anti-nuclear protesters in Japan pushing fake nuclear waste

Fukushima Prefecture is set to accept the construction of an interim facility to store radioactive waste from cleanup work due to the nuclear disaster, advancing the stalled process of decontaminating the affected areas.  The prefectural government has decided to shoulder the difference between the appraised value of land in Okuma and Futaba, where the structure will be built, and the price it would have fetched before the 2011 accident at the Fukushima No. 1 nuclear power plant.

The decision came after landowners insisted that the land should be bought at a fair market value because the current appraisals are much lower than pre-disaster estimates.  Consent from local governments is expected to move forward the central government’s plan to start transporting radioactive soil and other contaminated waste to the storage site in January.

Okuma and Futaba host the crippled Fukushima No. 1 nuclear power plant. The residents of the two towns are still living as evacuees due to high levels of radiation in their hometowns. Talks between local officials and the central government over the planned facility reached an impasse after Environment Minister Nobuteru Ishihara enraged landowners with a comment in June.  “In the end, it will come down to money,” Ishihara said, referring to efforts to gain local approval for the storage facilities. Residents were angry because of the implication they could be easily bought.

The stalemate threatened to jeopardize the entire decontamination operation in the prefecture since the storage site is indispensable to advance the work to clean up and rebuild the affected communities.  In an effort to break the stalemate, the central government on Aug. 8 offered to double the funds to be provided to the local governments to 301 billion yen ($2.9 billion).

Fukushima Prefecture to accept intermediate storage facility for radioactive waste, THE ASAHI SHIMBUN, August 23, 2014

Pacific Ring of Fire: Nuclear Power in Taiwan

Taiwan’s ruling Kuomintang party agreed with the opposition on suspending construction for a nuclear power plant that attracted tens of thousands in a demonstration in April 2014.  Premier Jiang Yi-huah said the government won’t be seeking additional funding to complete the project, located 40 kilometers (25 miles) east of Taipei, as a gesture of goodwill to the opposition Democratic Progressive Party, during a press briefing carried on cable television networks.

Pressure was mounting on President Ma Ying-jeou’s administration to halt the $9.4 billion project, after about 28,500 people rallied against it in front of the president’s office yesterday, according to police. Opposition DPP Chairman Su Tseng-chang lcalled for a suspension of the project in a televised meeting with Ma. A former chairman of Su’s party has been on a hunger strike since April 22.

“We’re putting the No. 4 nuclear power plant on hold in the spirit of leaving the next generation an option,” President Ma said on a post on his Facebook page yesterday, after a meeting with cabinet members including the premier, ministers of economy and atomic energy, as well as Taipei and Taichung city mayors. “When we need it in the future, it can offer an additional choice.”

Safety inspections on the plant’s first unit will be exempt from the halt, Jiang said, though the start of operations will need to follow a referendum vote. The plant is being built by Taiwan Power Co., a state-run utility.  S

Planning for Taiwan’s Longmen Nuclear Power Plant, the island’s fourth, began in 1980. Its two units have a planned electricity-generation capacity of 2,700 megawatts, which would account for about 6 percent of Taiwan’s installed capacity once completed. Atomic reactors made up 13 percent of the island’s electricity capacity, compared with 27 percent from coal-fired generators and 37 percent from gas-fueled units, according to Taipower’s website.

Like Japan, Taiwan lies on the Pacific Ring of Fire, an area bordering the Pacific Ocean that is tectonically active.

Excerpt, Yu-Huay Sun Taiwan Ruling Party Concedes on Halting Nuclear Power Plant, Economist,  May 3, 2014, at 36

Graves for Nuclear Waste – Fukushima

The central government [of Japan] is compiling a generous compensation plan to overcome the reluctance of two towns to host intermediate storage facilities for radioactive waste from the Fukushima nuclear disaster.  Measures being considered for the municipalities of Okuma and Futaba include buying or renting properties at inflated real estate values and covering the costs to relocate the grave sites of relatives.

Okuma and Futaba are hosts to Tokyo Electric Power Co.’s crippled Fukushima No. 1 nuclear power plant. The two towns and the Fukushima prefectural government have not given their consent for the intermediate storage facilities, with many residents fearing the facilities will become permanent fixtures in their backyards.  The waste, expected to fill the equivalent of 23 Tokyo Domes, is currently being kept temporarily in various locations in Fukushima Prefecture where decontamination work has been conducted.

The government under then Prime Minister Naoto Kan announced in August 2011 that intermediate storage facilities would be needed to take in the waste from those locations.  However, little progress has been made on constructing intermediate storage facilities, and the government says the delay has affected further decontamination efforts and overall reconstruction in Fukushima.

Large parts of Okuma and Futaba continue to have high levels of radiation, and prospects are dim that residents who fled the areas can return to their homes in the near future. The radiation levels have also pushed down real estate values in the two municipalities.  Under the central government’s compensation plan, the real estate values will be calculated on the assumption that the land and buildings will one day be available for use after radiation levels have fallen far enough for the evacuation orders to be lifted.  Government compensation will be separate from the compensation that local residents can receive from TEPCO.

Residents have also raised concerns that they would be unable to visit graves in Okuma and Futaba if the intermediate storage facilities are constructed there.  The central government’s plan would not only cover the costs of moving the gravestones and remains away from the storage facilities, but it would also pay for memorial services that would be needed in line with the transfer. In addition, the government would provide support if the local communities decide to construct a new cemetery in a location where radiation levels are comparatively low.

For families that do not want to move the graves, the central government will consider allowing the graves to remain at their current sites. The intermediate storage facilities could be designed to avoid such grave sites, and family members would be allowed to visit the graves even after the facilities are completed.

Government sweetening the pot for storage of Fukushima radioactive waste, THE ASAHI SHIMBUN, May 18, 2014

Where? to Place Fukushima Nuclear Waste

Fukushima prefectural authorities have asked the Environment Ministry to reduce from three to two the number of sites it plans for the temporary storage of radioactive debris generated by the Fukushima No. 1 nuclear power plant disaster.  Fukushima Governor Yuhei Sato on Feb. 12 submitted a request to Environment Minister Nobuteru Ishihara and Takumi Nemoto, the minister in charge of post-quake reconstruction, asking them not to build a storage facility in the town of Naraha so that its residents can return home earlier.  Based on the request, Ishihara said the Environment Ministry will review the initial plan to erect facilities in Naraha, as well as the towns of Okuma and Futaba.

The central government intended to construct intermediate storage facilities in the three towns, all in Fukushima Prefecture, that are capable of storing 13.1 million, 12.4 million and 2.5 million cubic meters of debris, respectively. The smallest of the sites was to be built in Naraha.

However, Sato argued in his request that if collected debris were burned to reduce its volume, the two larger sites could accommodate all the waste.  The governor also proposed that the ministry build a plant to process the ash from debris with radioactive values at 100,000 becquerels per kilogram or lower in Naraha instead…Elsewhere though, many other municipalities in the prefecture have urged the prefectural government to quickly facilitate the building of those facilities because radioactive soil and other associated waste generated by the Fukushima nuclear disaster are filling up temporary storage sites throughout the prefecture. The Environment Ministry estimates that 1.6 million cubic meters of debris was stored across Fukushima Prefecture as of the end of last October.

Excerpt, Fukushima seeks limit on radioactive waste disposal sites, THE ASAHI SHIMBUN, Feb. 13, 2014