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Robot pulled from Fukushima reactor due to radiation

serveimage.jpg

December 6, 2019

Cleaner robot pulled from Fukushima reactor as record radiation levels damage its camera

A remote-controlled cleaning robot sent into a damaged reactor at Japan‘s Fukushima nuclear plant had to be removed before it completed its work because of camera problems most likely caused by high radiation levels.

It was the first time a robot has entered the chamber inside the Unit 2 reactor since a March 2011 earthquake and tsunami critically damaged the Fukushima Da-ichi nuclear plant.

Tokyo Electric Power Co. said it was trying to inspect and clean a passage before another robot does a fuller examination to assess damage to the structure and its fuel. 

WHAT HAPPENED? 

The robot went only part way into a space under the core that TEPCO wants to inspect closely. 

It crawled down the passage while peeling debris with a scraper and using water spray to blow some debris away. 

The dark brown deposits grew thicker and harder to remove as the robot went further.

After about two hours, the two cameras on the robot suddenly developed a lot of noise and their images quickly darkened — a sign of a problem caused by high radiation.

 

The second robot, known as the ‘scorpion,‘ will also measure radiation and temperatures.

Thursday‘s problem underscores the challenges in decommissioning the wrecked nuclear plant. 

Inadequate cleaning, high radiation and structural damage could limit subsequent probes, and may require more radiation-resistant cameras and other equipment, TEPCO spokesman Takahiro Kimoto said.

We will further study (Thursday‘s) outcome before deciding on the deployment of the scorpion,‘ he said.

TEPCO needs to know the melted fuel‘s exact location and condition and other structural damage in each of the three wrecked reactors to figure out the best and safest ways to remove the fuel. 

It is part of the decommissioning work, which is expected to take decades.

During Thursday‘s cleaning mission, the robot went only part way into a space under the core that TEPCO wants to inspect closely. 

It crawled down the passage while peeling debris with a scraper and using water spray to blow some debris away. The dark brown deposits grew thicker and harder to remove as the robot went further.

After about two hours, the two cameras on the robot suddenly developed a lot of noise and their images quickly darkened — a sign of a problem caused by high radiation.

Operators of the robot pulled it out of the chamber before completely losing control of it.

The outcome means the second robot will encounter more obstacles and have less time than expected for examination on its mission, currently planned for later this month, though Thursday‘s results may cause a delay.

Both of the robots are designed to withstand up to 1,000 Sieverts of radiation. 

The cleaner‘s two-hour endurance roughly matches an estimated radiation of 650 Sieverts per hour based on noise analysis of the images transmitted by the robot-mounted cameras. 

That‘s less than one-tenth of the radiation levels inside a running reactor, but still would kill a person almost instantly.

Kimoto said the noise-based radiation analysis of the Unit 2‘s condition showed a spike in radioactivity along a connecting bridge used to slide control rods in and out, a sign of a nearby source of high radioactivity, while levels were much lower in areas underneath the core, the opposite of what would normally be the case. 

He said the results are puzzling and require further analysis.

TEPCO officials said that despite the dangerously high figures, radiation is not leaking outside of the reactor.

Images recently captured from inside the chamber showed damage and structures coated with molten material, possibly mixed with melted nuclear fuel, and part of a disc platform hanging below the core that had been melted through. 

https://insiderfinancial.net/robot-pulled-from-fukushima-reactor-due-to-radiation.html

December 8, 2019 Posted by | fukushima 2019 | , , | Leave a comment

Radiation levels inside Fukushima high enough to kill robot sent to clean

serveimage

December 6, 2019

A remote-controlled cleaning robot sent into a damaged reactor at Japan‘s Fukushima nuclear plant had to be removed Thursday before it completed its work because of camera problems most likely caused by high radiation levels.

It was the first time a robot has entered the chamber inside the Unit 2 reactor since a March 2011 earthquake and tsunami critically damaged the Fukushima Da-ichi nuclear plant.

Tokyo Electric Power Co. (TEPCO) said it was trying to inspect and clean a passage before another robot does a fuller examination to assess damage to the structure and its fuel. The second robot, known as the “scorpion,” will also measure radiation and temperatures.

Thursday‘s problem underscores the challenges in decommissioning the wrecked nuclear plant. Inadequate cleaning, high radiation and structural damage could limit subsequent probes, and may require more radiation-resistant cameras and other equipment, TEPCO spokesman Takahiro Kimoto said.

“We will further study (Thursday‘s) outcome before deciding on the deployment of the scorpion,” he said.

TEPCO needs to know the melted fuel‘s exact location and condition and other structural damage in each of the three wrecked reactors to figure out the best and safest ways to remove the fuel. It is part of the decommissioning work, which is expected to take decades.

The remote-controlled “cleaning” robot, bottom, was sent in to inspect and clean a passage for another robot in the damaged nuclear facility. (TEPCO/Associated Press)

During Thursday‘s cleaning mission, the robot went only part way into a space under the core that TEPCO wants to inspect closely. It crawled down the passage while peeling debris with a scraper and using water spray to blow some debris away. The dark brown deposits grew thicker and harder to remove as the robot went further.

More obstacles for second mission

After about two hours, the two cameras on the robot suddenly developed a lot of noise and their images quickly darkened — a sign of a problem caused by high radiation. Operators of the robot pulled it out of the chamber before completely losing control of it.

The outcome means the second robot will encounter more obstacles and have less time than expected for examination on its mission, currently planned for later this month, though Thursday‘s results may cause a delay.

Both of the robots are designed to withstand up to 1,000 Sieverts of radiation. The cleaner‘s two-hour endurance roughly matches an estimated radiation of 650 Sieverts per hour based on noise analysis of the images transmitted by the robot-mounted cameras. That‘s less than one-tenth of the radiation levels inside a running reactor, but still would kill a person almost instantly.

Kimoto said the noise-based radiation analysis of the Unit 2‘s condition showed a spike in radioactivity along a connecting bridge used to slide control rods in and out, a sign of a nearby source of high radioactivity, while levels were much lower in areas underneath the core, the opposite of what would normally be the case. He said the results are puzzling and require further analysis.

TEPCO officials said that despite the dangerously high figures, radiation is not leaking outside of the reactor.

Images recently captured from inside the chamber showed damage and structures coated with molten material, possibly mixed with melted nuclear fuel, and part of a disc platform hanging below the core that had been melted through.

https://livingstonledger.com/radiation-levels-inside-fukushima-high-enough-to-kill-robot-sent-to-clean/

December 8, 2019 Posted by | fukushima 2019 | , , | Leave a comment

High-level radiation hot spots found at J-Village, the starting point of Tokyo 2020 Olympic Torch Relay

1e892707-191026_j_villageThe Japan leg of the 2020 Tokyo Olympic torch relay will start at a the J-Village soccer facility in Fukushima Prefecture.

Tokyo, Japan, 4 December 2019 – High-level radiation hot spots have been found at the sports complex where the 2020 Tokyo Olympic torch relays will begin, according to a survey to be released by Greenpeace Japan. The radiation levels around J-Village Stadium in Fukushima Prefecture were as high as 71 microsieverts per hour at surface level. This is 1,775 times higher than the 0.04 microsieverts per hour prior to the Fukushima Daiichi triple reactor meltdown in 2011.

Greenpeace’s Nuclear Monitoring & Radiation Protection Advisors detected and documented several radiation hot spots on 26 October during its annual survey, which will be published in spring 2020. On 18 November, Greenpeace Japan sent a letter to Minister Koizumi of the Japanese Ministry of the Environment

, demanding immediate decontamination measures and assurance that the public will not be exposed to radiation hot spots during the Olympics and Paralympics events at J-Village. Copies were also sent to the President of the International Olympic Committee, as well as the Presidents of the International Paralympic Committee, Japanese Olympic and Paralympic Committees, and the Governor of Fukushima Prefecture, who is also the President of J-Village. 

Greenpeace has yet to receive a response from the Japanese government but is publicly releasing the information on the radiation hot spots due to an article published today (4 December) by Sankei Shimbun.

The article reports some details of Greenpeace Japan’s letter to the Japanese government and Olympic bodies, which was leaked to the media by an unknown official. The article states that the soil around the particular hotspot with 71 microsieverts per hour at surface level was removed by TEPCO yesterday (3 December).

While general radiation levels were low at the J-Village, these radiation hot spots are of significant public health concern. Radiation hot spots of such high levels can be found in the closed area around Fukushima (so-called Area 3), but should not be present in publicly accessible areas. Yet, they are at a location that has been the focus of an extensive decontamination program and is also the starting point for the Olympic torch relay in Japan. 

These radiation hot spots highlight both the scale of contamination caused by the Fukushima Daiichi disaster, and the failure of decontamination efforts. We have called on the Ministry of Environment to act urgently and to initiate immediate decontamination,” said Kazue Suzuki, Energy Campaigner at Greenpeace Japan. 

The radiation hot spots at the parking lot close to J-Village are of particular concern because they are located in an area that is currently visited by a large number of people. The highest figures were: 71µSv/h at contact, 32µSv/h at 10cm, 6µSv/h at 50cm and 1.7µSv/h at 1m, while the official Japanese government’s decontamination threshold is 0.23µSv/h. 

There is a risk that heavy rain will spread these higher levels of contamination on public roads, and thus re-contaminate already decontaminated surfaces. This could partially undo earlier efforts to decontaminate the public areas in J-Village. From our observations, it is unlikely that radiation hot spots of such high levels re-emerged from re-contamination after the previous decontamination. It is more logical that the decontamination was not sufficiently and thoroughly conducted in the first place,” said Shaun Burnie, Senior Nuclear Specialist at Greenpeace Germany and the team leader of the survey.

To protect public safety, Greenpeace Japan demands that the Japanese government conduct an immediate and extensive radiation survey of the public areas in and around J-Village and nearby Olympic/Paralympic venues. Furthermore, they should promptly conduct decontamination if further radiation hot spots are identified. Regular screenings of the radiation levels in J-Village should be also conducted to monitor possible re-contamination of public areas.

Greenpeace’s Nuclear Monitoring & Radiation Protection Advisors will soon re-test the J-Village to determine if subsequent decontamination attempts have been adequately conducted.

https://www.greenpeace.org/japan/uncategorized/press-release/2019/12/04/11770/?fbclid=IwAR2ipzVjeLhwCvAc4szkNbgg_tBfcL4SU7RM9eeLbY6Zt_W43D3qYfZSbHg

December 8, 2019 Posted by | fukushima 2019 | , , , | Leave a comment

OLYMPICS/ S. Korea to bring food, check for radiation at Tokyo Games

korea japan.jpg

December 4, 2019

SEOUL–South Korea’s Olympic committee plans to buy radiation detectors and ship homegrown ingredients to Japan for its athletes at the Tokyo Games because of worries local food may be contaminated by the 2011 Fukushima nuclear disaster.

Japan has posted data to show the country is safe from Fukushima radiation and many countries have lifted Fukushima-related food restrictions.

The Korea Sports & Olympic Committee (KSOC) plans to ship red pepper paste, a key ingredient in Korean dishes, and other foods, and check for radiation in meat and vegetables that can only be sourced locally due to stringent quarantine rules, a KSOC meals plan report shows.

“Apparently, ingredients and food will be transported from South Korea as much as possible, possibly including canned food,” Shin Dong-keun, a ruling Democratic Party member of the parliamentary sports committee who was recently briefed by KSOC, told Reuters in an interview.

“For this Olympic games, food is our team’s main focus so they can provide safe meals for the athletes to erase radiation worries, as opposed to in the past, food was meant to play the supplementary role of helping with their morale.”

KSOC plans to arrange local Korean restaurants to prepare meals for baseball and softball players competing in Fukushima, as shipping boxed lunches from Tokyo is not feasible, it said in the “2020 Tokyo Summer Olympics Meals Support Center Plan.”

“These Korean restaurants should only handle food confirmed as radiation free,”

The Fukushima No. 1 nuclear power plant, located about 220 kilometers northeast of Tokyo, was rocked by a magnitude 9.0 earthquake and subsequent tsunami in March 2011, sparking three reactor meltdowns.

More than 160,000 residents fled nearby towns in the aftermath as radiation from the reactors contaminated water, food and air.

RADIATION HOT SPOTS

Greenpeace said on Wednesday that radiation hot spots have been found at the J-Village sports facility in Fukushima where the Tokyo 2020 Olympic torch relay will begin.

South Korea has stepped up demands for a Japanese response to concerns food produced in the Fukushima area and nearby sea could be contaminated by radiation from the Fukushima plant.

Japan is having trouble removing more than 1 million tons of contaminated water from the crippled plant.

When it finalizes menus around April, the KSOC will consider asking Tokyo to ease its stringent quarantine ban on South Korean produce, an official at the committee said.

The official said South Korea was preparing a separate meals plan due to concerns from the public and politicians over food safety, unlike the United States and Australia whose athletes will mainly eat food provided by the host country, Japan.

The official requested anonymity due to the sensitivity of the matter.

South Korea’s concerns about possible contamination from the nuclear disaster has become a thorn in already contentious ties with Japan.

Seoul has banned imports of seafood from Japan’s Fukushima region since the nuclear disaster, prompting Tokyo to launch a World Trade Organization complaint. Japan has said many nations such as the United States and Australia had lifted or eased Fukushima-related restrictions.

Japanese officials use international events to promote the recovery of areas hit by the 2011 tsunami and nuclear disaster to show produce from Fukushima Prefecture is safe.

Mineral water from Fukushima was served on tables at the last month’s Group of 20 foreign ministers meeting it hosted in Nagoya.

The South Korean Olympic committee plan to purchase radiation detecting equipment by February and station an inspector at its own cafeteria in Tokyo during the games to check contamination levels, according to the KSOC report.

The budget for the Tokyo Olympics meals service is earmarked at 1.7 billion won ($1.44 million or 155 million yen), which includes twice the amount of money for buying and shipping ingredients than previous games, according to the committee.

http://www.asahi.com/ajw/articles/AJ201912040049.html?fbclid=IwAR1CWlV5oDPx_ROTX5jh4WMeFnTmh7rykUwnbPa3dPHgYGTPqZZUmicAUxo

December 8, 2019 Posted by | fukushima 2019 | , , , | Leave a comment

Olympics-Radiation hot spots found at Tokyo 2020 torch relay start – Greenpeace

1e892707-191026_j_village.pngJ-village

December 4, 2019

TOKYO, Dec 4 (Reuters) – Radiation hot spots have been found at the J-Village sports facility in Fukushima where the Tokyo 2020 Olympic torch relay will begin, Greenpeace Japan said on Wednesday.

Greenpeace found that radiation levels around the recently refurbished venue, which also hosted the Argentina team during the Rugby World Cup earlier this year, were significantly higher than before the Fukushima Daiichi nuclear reactor meltdown following the March 2011 earthquake and tsunami.

Greenpeace’s survey found radioactivity readings taken at J-Village on Oct. 26 as high as 71 microsieverts per hour at surface level.

People are exposed to natural radiation of 2,000-3,000 microsieverts a year, so anyone staying in the vicinity of J-Village for two or more days could be exposed to more than that.

These readings, although not deemed life-threatening if exposed for a short length of time, are 1,775 times higher than prior to the March 2011 disaster, according to the NGO.

The Olympic flame is due to arrive from Greece in Japan on March 20, with the torch relay officially starting from J-Village on March 26.

Greenpeace said in a statement that it had sent its findings to Japan’s Ministry of Environment, but had received no response.

“There is a risk that heavy rain will spread these higher levels of contamination on public roads, and thus re-contaminate already decontaminated surfaces,” warned Greenpeace nuclear specialist Shaun Burnie, team leader of the J-Village survey, in a statement.

An ministry official acknowledged to Reuters on Wednesday that the ministry had been alerted to higher radiation level readings in an area surrounding J-Village and that decontamination measures had been taken.

“The ministry cooperated with related groups to decrease radiation levels in that area,” said the official.

“On Dec. 3, Tokyo Electric Power (Tepco) took measures to decrease radiation levels in said area.”

The Fukushima Daiichi nuclear station, located about 220 km (130 miles) northeast of Tokyo, was rocked by a magnitude 9.0 earthquake and subsequent tsunami in March 2011, sparking three reactor meltdowns.

More than 160,000 residents fled nearby towns in the aftermath as radiation from the reactors contaminated water, food and air. Greenpeace called on the Japanese government to conduct more extensive radiation surveys in the area and the NGO planned to return to J-Village soon to “determine if subsequent decontamination attempts have been adequately conducted.”

Tokyo 2020 organisers could not be immediately reached for comment.

Worries that local food could be contaminated by the nuclear disaster has prompted plans by South Korea’s Olympic committee to buy radiation detectors and ship homegrown ingredients to Japan for its athletes at the Tokyo Games. (Additional reporting by Mari Saito; editing by Simon Cameron-Moore)

https://af.reuters.com/article/africaTech/idAFL8N28E0L7?fbclid=IwAR01no7I0LUG2acAbapUgk9ERcWBHsndxvGdEeC1mYvj_fEYJZ-SEHlEr6g

December 8, 2019 Posted by | fukushima 2019 | , , , , | Leave a comment

Radiation hotspots ‘found near Fukushima Olympic site’

Greenpeace calls for fresh monitoring of region where nuclear disaster occurred

 

1002.jpegThe Fukushima Daiichi power plant, which was the site of a nuclear disaster in 2011. Officials are keen to showcase the area’s recovery.

Wed 4 Dec 2019

Greenpeace has said it detected radiation hotspots near the starting point of the upcoming Olympic torch relay in Fukushima.

Japan’s environment ministry said the area was generally safe but it was in talks with local communities to survey the region before the 2020 Games, which open on 24 July.

The government is keen to use the Olympics to showcase Fukushima’s recovery from the 2011 tsunami. It intends to use J-Village, a sports complex located about 12 miles from the nuclear plant that was damaged in the disaster, as the starting point for the Japan leg of the torch relay taking place in March.

Originally designed as a training centre for athletes, J-Village functioned for years as a logistics hub for crews working to control and decommission the defunct reactors.

After a cleanup process, the sports centre became fully operational again in April this year, shortly after the torch relay decision.

Greenpeace urged fresh radiation monitoring and continued cleanup efforts, saying it had detected some spots with radiation levels as high as 1.7 microsieverts per hour when measured one metre above the surface.

This compared with the national safety standard of 0.23 microsieverts per hour, and a normal reading in Tokyo of about 0.04 microsieverts per hour. The hotspots showed a reading of 71 microsieverts per hour at the surface level, Greenpeace said.

However, J-Village’s website said the radiation reading at its main entrance was 0.111 microsieverts per hour on Wednesday, while one of its fields showed a reading of 0.085 microsieverts per hour.

The Tokyo Electric Power Company, which operates the Fukushima plant, said it cleaned the spots on Tuesday after the environment ministry told the firm about them.

Greenpeace said it relayed its findings to the Japanese government as well as local and international Olympic organisers. The group will publish a report of its findings in the region next year.

https://www.theguardian.com/world/2019/dec/04/radiation-hotspots-found-near-fukushima-olympic-site-greenpeace

December 8, 2019 Posted by | fukushima 2019 | , , , | Leave a comment

Fukushima launches first sake promotion event in New York

Fukushima ‘hot’ sake anyone?
n-sake-a-20191204-870x603.jpg
Customers at a Japanese restaurant in New York drink Fukushima sake
Dec 3, 2019
NEW YORK – The Fukushima Prefectural Government launched a weeklong sake promotion event in New York City on Monday, hoping to boost recognition of its Japanese rice wine among U.S. consumers amid a sales slump in the domestic market.
Ten Japanese restaurants in the city are participating in the first-ever Fukushima Sake Week through Sunday, offering 23 varieties of sake from 13 breweries.
The event is aimed at increasing sake sales in the U.S. and European markets as Japanese sake brewers face declining domestic sales due partly to changing consumer tastes.
Sake brewers in Fukushima Prefecture are also facing export restrictions to some countries such as China following the nuclear disaster triggered by a powerful earthquake and tsunami in March 2011.
Sakamai, one of the restaurants taking part, is offering three brands.
Ken Chino, floor manager at Sakamai, said, “I am always impressed by Fukushima sake.”
The Fukushima Prefectural Government official in charge of trade promotion said, “By holding this event in New York where information is disseminated, we hope that the high quality (of Fukushima’s sake products) will be spread to the world and also shared by people in the regions where safety concerns still take root.”

December 8, 2019 Posted by | fukushima 2019 | , | Leave a comment

Fukushima nuclear debris removal to begin in 2021

1111111.jpg(Photo taken in Fukushima Prefecture on Aug. 10, 2018, shows the Fukushima Daiichi nuclear power plant.)

December 3, 2019

Japan on Monday unveiled a revised plan to remove molten nuclear fuel debris from the crisis-hit Fukushima Daiichi power plant in 2021, a process said to be the biggest hurdle in the cleanup of the devastated facility.

The debris removal work should start at the plant’s No. 2 reactor, according to the medium- to long-term road map released by the government.

The plan also called for completing the removal of 4,741 fuel rods left inside the pools of Nos. 1 to 6 units by 2031, giving a specific time frame for the first time.

“As more people return and rebuilding progresses in the areas around the Daiichi plant, we will take measures based on the basic principle of balancing rebuilding and decommissioning,” said industry minister Hiroshi Kajiyama, who heads the government team tasked with decommissioning.

(Photo taken in Fukushima Prefecture on Aug. 10, 2018, shows the Fukushima Daiichi nuclear power plant )

The plan, revised for the fifth time, maintained the outlook of completing the decommissioning of the plant operated by Tokyo Electric Power Company Holdings Inc. in 30 to 40 years following the nuclear meltdowns triggered by a massive earthquake and tsunami on March 11, 2011.

But given issues that have halted work and caused delays so far, it remains uncertain whether the plan will proceed as scheduled.

The No. 2 unit was in operation when the crisis began and some fuel has apparently melted through the reactor pressure vessel that holds the fuel and accumulated at the bottom of the outer primary containment vessel.

Among the three reactors that experienced core meltdowns, the reactor building housing the No. 2 unit did not suffer hydrogen explosions. The radiation levels near the reactor containment vessel are also estimated to be lower than others.

Prior to removing the nuclear debris, an earlier plan called for taking samples from the reactor within fiscal 2019 ending in March, but the revised plan states it will be done in time for the 2021 removal, and the removal to expand to 2031.

Removal of spent fuel has already begun at some of the reactors as they need to be cooled to avert melting. The fuel, including some unspent fuel, which is currently being stored inside respective pools, need to be taken to a common pool to be stored stably, although its final destination is yet to be decided.

All fuel has been removed from the pool of No. 4, which was being halted for a regular checkup at the time of the crisis, and the removal of fuel from No. 3 began in April. The same work will begin at Nos. 1 and 2 in fiscal 2023, according to the latest plan.

https://english.kyodonews.net/news/2019/12/957487f7b687-fukushima-nuclear-debris-removal-to-begin-in-2021.html

December 8, 2019 Posted by | fukushima 2019 | , | Leave a comment

METI eyes 2031 end to Fukushima No. 1 cleanup

n-fukushima-a-20191203-870x565.jpg
The Fukushima No. 1 nuclear power plant is seen in this photo taken on March 11.
by Mari Yamaguchi
Dec 2, 2019
The industry ministry on Monday unveiled a revised plan to remove molten nuclear fuel debris from the meltdown-hit Fukushima No. 1 power plant in 2021 — a process said to be the biggest hurdle to decommissioning the six-reactor facility.
Work to remove the debris should start with the No. 2 reactor, according to the mid- to long-term road map released by the government.
Designating a specific time frame for the first time, the plan also calls for completing the removal of 4,741 fuel rods left inside the cooling pools for reactor Nos. 1 to 6 by 2031.
“As more people return and rebuilding progresses in the areas around the No. 1 plant, we will take measures based on the basic principle of balancing rebuilding and decommissioning,” said Minister of Economy, Trade and Industry Hiroshi Kajiyama, who heads the state team tasked with decommissioning the heavily damaged plant.
The plan, revised for the fifth time, maintains the general outlook for finishing the cleanup within 30 to 40 years of the triple meltdown, which was triggered by the mega-quake and tsunami on March 11, 2011.
But, given issues that have halted work and caused delays so far, it remains uncertain whether the plan will proceed as scheduled.
Here is a look at some of the challenges facing Fukushima No. 1:
Melted fuel debris
By far the toughest challenge is removing the 800 tons of nuclear fuel that melted in the three reactors before dropping from their cores and hardening at the bottom of the primary containment vessels.
Over the past two years, Tepco has made progress gathering details mainly from two of the reactors. In February, a small telescopic robot sent inside the No. 2 reactor showed that small pieces of debris can come off and be lifted out. Thus debris removal is scheduled to begin there by the end of 2021.
Earlier, assessments of the No. 3 reactor were hampered by high radiation and water levels in the PCVs. A robot survey at the No. 1 reactor also failed from extremely high radiation.
Experts say a 30- to 40-year completion decommissioning target is too optimistic. Some doubt that removing all of the fuel is even doable and suggest an approach like Chernobyl — contain the reactors and wait until radioactivity naturally fades.
Fuel rods
Together, the three reactors have more than 1,500 units of mostly spent nuclear fuel rods inside that must be kept cool in pools of water. They’re among the highest risks at the plant because the pools are uncovered, and loss of water from structural damage or sloshing in the event of another major quake could cause them to melt and release massive radiation.
The manager of the plant, Tokyo Electric Power Company Holdings Inc., started removing rods from the No. 3 reactor pool in April and aims to get all 566 out by March 2021. Removal of rods from units 1 and 2 is to begin in 2023.
By 2031, Tepco plans to remove thousands of rods at the two units that survived the tsunami and store them in dry casks on the compound. Over 6,300 fuel rods were in the six reactor cooling pools at the time, and only the pool at No. 4 has been emptied.
Tainted water
The government and Tepco have been unable to get rid of the more than 1 million tons of radioactive water that has been treated and stored on site, fearing public repercussions. The utility has managed to cut the volume by pumping up and diverting groundwater upstream, as well as by installing a costly underground “ice wall” around the reactor buildings to keep water from entering.
Tepco says it only has space for up to 1.37 million tons until summer 2022, raising speculation it might release the tainted water after the 2020 Olympics. Tepco and experts say that the tanks are hampering decommissioning work and that the space they occupy must be freed up to build storage for the debris and other radioactive materials to be removed. There is also the risk that the tanks might fail and release their contents in the event of another quake, tsunami or flood.
Experts say a controlled release of the water into the ocean is the only realistic option, one that will take decades. For years, a government panel has been discussing methods amid opposition from fishermen and residents who fear it will damage their products and their health.
Radioactive waste
Japan has yet to develop a plan to dispose of the highly radioactive waste that will come out of the reactors. Under the road map, the government and Tepco will compile a plan sometime after the first decade of removal work ends in 2031.
Managing the waste will require new technologies to compact it and reduce its toxicity. Tepco and the government say they plan to build a temporary storage site for the waste. But finding a site and getting public consent to store it there will be nearly impossible, raising doubts the cleanup can be finished within 40 years.
Manpower concerns
Securing a workforce for the decades-long project is yet another challenge, especially in a country with a rapidly aging and declining population. Tepco announced plans to hire foreign workers for the decommissioning process under Japan’s new visa program to attract unskilled foreign labor, but put it on hold after receiving government instructions on careful planning to address concerns about language problems and safety. Universities are also struggling to attract students in nuclear science, a formerly elite major that has become unpopular since the Fukushima crisis.

 

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December 8, 2019 Posted by | fukushima 2019 | , | 1 Comment

Fukushima’s contaminated water is an issue affecting all of humanity

An ocean dump could lead to a global ecological disaster

601575177786An image of the Fukushima nuclear power plant, including storage tanks for contaminated water, taken by Greenpeace campaigner and Swedish photographer Christian Aslund on Oct. 16, 2018.

December 1, 2019

As the possibility of Japan dumping contaminated water from the Fukushima Nuclear Power Plant into the ocean has been raised, concerns are being voiced on the Korean Peninsula and through various international organizations. Obviously, it is South Korea that is leading the efforts at international coordination in organizations like the International Atomic Energy Agency (IAEA), International Maritime Organization (IMO), and World Health Organization (WHO).

The biggest issue that stands to arise if the contaminated water is dumped into the ocean is the major impact on the marine environment in the Western Pacific and the health of residents in the region, and South Korea is the closest neighbor to Japan.

In a recent piece published in the UK’s The Economist, Shaun Burnie of Greenpeace Germany warned that if Japan dumped the water into the pacific, radioactive material will begin flowing into the East Sea within a year. As Japan’s closest neighbor, South Korea has maintained that it has a right to sufficiently discuss the potential environmental threat and demand related information. During a South Korean parliamentary audit, expressions of concern about the Fukushima water release were coupled with demands for response measures to be put in place.

Unfortunately, these messages and warnings are not being expressed as part of a system of guidance and cooperation to permit a fundamental resolution. Rather, they amount more to a form of pressure within international discourse, which runs the risk of being shrugged off with pro forma logic. The predictions that radioactive material will begin washing into the East Sea within a year could change with the actual amounts and concentrations of water dumped; in the absence of real announced concentrations of inflowing contaminants, it does nothing more than to raise a threat.

More than the fact of the inflows over the year after release, we need to be aware that there are migrating species that could enter the waters near South Korea at any time. Also, what is to be done about the destruction to the marine ecosystem or the marine life that is being fished in the Pacific by the different countries? The result would be a disaster for humankind. We need a more in-depth and scientific examination to identify a disposal plan that allays the concerns of Japan’s neighbors as well as those of Japanese civil society and fishers, who are the ones suffering the ill effects first hand.

Plans for handling marine contaminants fall into five main categories. The first involves controlling the source. The most basic means of resolution is to replace materials and production processes and ban production and consumption to ensure that contaminants are not released in the first place. The second involves recirculation and reuse. This means either re-circulating contaminants through nature or reusing them for other purposes. The third involves storing the contaminants. In cases where no disposal method has yet been developed and reuse is not an option, the approach has been to contain and process them at a safe distance from areas of human activity.

The fourth involves controlling contamination through a regional quota system. This means applying different standards for management depending on the uses of particular waters; in South Korea’s case, marine protected areas and special management areas fall into this category. The last approach is contamination control through taxation. Under such a system, penalties are imposed in cases where contamination is unavoidable; as a rule, the party responsible bears the costs for compensation and restoration.
301575177857Lee Suk-mo, professor of ecological engineering at Pukyong National University

An ocean dump from a nuclear power plant at the current level, without any international regulations in place, would be utterly unacceptable and an affront to environmental justice for humanity today and future generations. Radioactive material decays naturally; if set apart and stored, it goes away naturally over time. But because of issues concerning time and space, this is not an economical approach, and new and effective disposal technology could be developed while it is being stored.

This is why the nuclear power plant water issue is something that should be approached as an issue affecting all of humanity, rather than one restricted to Fukushima and Japan. In particular, neighbors and countries possessing nuclear power plants of their own should make it a priority to cooperate fully in technological and economic terms.

Human disasters may start in one country, but it is through international cooperation that a country’s disaster can be resolved.

By Lee Suk-mo, professor of ecological engineering at Pukyong National University

http://www.hani.co.kr/arti/english_edition/e_international/919137.html

December 2, 2019 Posted by | fukushima 2019 | , , , | Leave a comment

Safety concerns linger although Onagawa reactor cleared to restart

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The Onagawa nuclear power plant in Miyagi Prefecture.
November 29, 2019
Tohoku Electric Power Co. announced Nov. 27 that the No.2 reactor at its Onagawa nuclear power plant in Miyagi Prefecture has cleared the regulatory screening for a restart, more than eight years after it was damaged in the earthquake and tsunami that triggered the Fukushima disaster.
The Nuclear Regulation Authority (NRA) has produced a draft report on its safety inspections of the reactor, saying it has met the new safety standards introduced after the 2011 Fukushima nuclear disaster. The NRA’s action means the unit, which is a boiling water reactor like those at the stricken Fukushima No. 1 nuclear power plant, has passed a key test for its reactivation.
The nuclear safety watchdog has spent six years assessing the safety of the reactor since the utility applied for a license to bring the unit back online.
Tohoku Electric Power has taken safety measures to ensure that the reactor will withstand an earthquake with a shaking intensity twice larger than previously assumed. The company has also promised to build a 29-meter high seawall in line with the lessons learned from the 2011 disaster, when the plant came close to being hit by the tsunami. Special facilities to respond to a severe accident will also be installed.
Despite all these new safety measures, the risk of the unexpected occurring, resulting in damage to the reactor, should not be ruled out.
There are still more things that should be done and considered before debating the appropriateness of allowing the utility to restart the reactor when the promised measures have been taken. The work is expected to be completed in fiscal 2020.
The biggest worry about the plan to bring the reactor back on stream is the lack of a viable plan for emergency evacuations of local residents.
The Oshika Peninsula, where the nuclear plant stands, has a rugged coastline that turns back upon itself repeatedly. This topographic feature limits possible emergency escape routes.
The local populations of both Onagawa and Ishinomaki, which host the plant, are aged, with people 65 years or older accounting for more than 30 percent of all the residents. One in every five local residents lives alone.
An evacuation plan based on the use of private cars and buses will be difficult to carry out. That will be all the more so in cases of complex disasters such as an earthquake and tsunami occurring in succession.
Some 210,000 people live within 30 kilometers from the nuclear plant including residents of five other neighboring municipalities. The local governments within this radius are legally required to develop evacuation plans. It will be a herculean task to secure evacuation centers that can take in all these people.
The governments of many nuclear host communities in rural areas where the local economy is heavily dependent on state subsidies and jobs provided by nuclear plants will agree to reactor restarts.
But many local residents in these communities remain deeply concerned about the safety of the reactors in their towns and cities.
Earlier this month, a group of Ishinomaki citizens filed a request with the Sendai District Court for an injunction to ban the Miyagi governor and the Ishinomaki mayor from approving the utility’s plan to restart the reactor. The legal action clearly reflects local residents’ anxiety.
A proposal to hold a local referendum on the planned reactor restart based on 110,000 signatures was submitted to the prefectural assembly although it was rejected.
The heads of some local governments in the region have expressed their opposition to the utility’s plan to resume operation of the reactor, saying they cannot take the responsibility to protect the lives of local residents during emergencies.
The Asahi Shimbun has argued that a wider scope of communities around nuclear power plants should be involved in the process. As for the Onagawa plant, there is a system to communicate the opinions of the five surrounding municipalities to Tohoku Electric Power through the prefectural government.
The Fukushima disaster has shown in a graphic manner that a wide range of areas are affected by any serious nuclear accident.
Both the Miyagi prefectural administration and Tohoku Electric Power should pay serious attention to the voices of local communities in wide areas surrounding the nuclear plant.
Nuclear power generation has been promoted under a national policy while nuclear plants have been operated by private-sector companies.
Commenting on Tohoku Electric Power’s plan to resume operating the reactor at the Onagawa plant, Miyagi Governor Yoshihiro Murai has said the central government should make the final decision and take responsibility for it.
In addition to the local administrations and utilities involved, the central government needs to address doubts and concerns among local residents related to a plan to restart a nuclear reactor.
Already, nine reactors have been reactivated under the new nuclear safety standards.
But the Onagawa plant is located in an area that has been repeatedly hit by earthquakes and tsunami. Experts say there are risks of the plant being struck by a major disaster. These facts should not be forgotten.

December 2, 2019 Posted by | Japan | , | Leave a comment

Possible radioactive water leak at Japan’s crisis hit Fukushima nuke plant

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November 28, 2019
TOKYO, Nov. 28 (Xinhua) — The operator of the disaster-hit Fukushima Daiichi nuclear power plant in northeastern Japan said Thursday that radioactive rainwater may be leaking into the ground through an exhaust stack.
According to Tokyo Electric Power Company (TEPCO), rainwater leaving the ducts of one of the crippled plant’s 120-meter tall exhaust stacks contains high levels of radioactive materials.
The exhaust duct became highly contaminated when an earthquake-triggered tsunami battered the plant in March 2011, knocking out its key cooling systems and leading to core meltdowns and hydrogen explosions, resulting in the worst global nuclear crisis since Chernobyl in 1986.
The embattled utility, in a bid to collect and contain the radioactive water, said it has installed a concrete box designed to automatically distribute the water among storage tanks when the concrete box reaches a certain capacity.
TEPCO said, however, the concrete box it has installed is leaking, with radioactive water possibly flowing freely into the ground through the holes in the box.
The utility said, ostensibly confirming the leak of radioactive water into the ground, that water levels in the concrete box are falling, even when the contaminated rainwater is not being sent to the storage tanks.
TEPCO said it has not detected any “major” changes in levels of radioactivity in groundwater surrounding the leaking box and claimed there has been no adverse affects on the environment.
As the nuclear disaster at the stricken plant in Japan’s northeast continues to rumble on, the government here said earlier this month it would be safe to release radioactive water into the Pacific Ocean.
The plant in Fukushima Prefecture has being storing water that has been used to keep the nuclear cores cool after the meltdowns.
The water used to cool the melted-down cores and the groundwater at the battered plant, however, are contaminated with highly radioactive materials.
The plant is struggling to store the contaminated water in tanks at the plant and the amount of water collected has already exceeded 100 tons, with the amount rising on a daily basis and space rapidly running out.
TEPCO has said it expects the plant’s water storage tanks to become full by the summer of 2020.
Concerns have been voiced, however, over how different factors could affect the impact of the release of contaminated water into the Pacific Ocean, such as the weather and the currents of the sea.
In addition, concerns have also been made over the actual amount of radiation that humans could be internally exposed to, if and when the water is released, when factoring in the consumption of contaminated fish and seaweed.
While the government has suggested dumping the excess water into the ocean would be safe, local fisherman have expressed their vehement opposition to the move.
They argue that such a move would adversely affect the reputation of their produce and, once again, make it extremely difficult if not impossible for them to earn a living.
Some neighboring countries, including South Korea, have also voiced their opposition to the idea, citing concerns over the impact on the environment if radioactive water is released from the crisis-hit plant into the Pacific Ocean.

December 2, 2019 Posted by | fukushima 2019 | , | Leave a comment

Regulator: Venting at Fukushima reactor failed

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Thursday, Nov. 28
Japan’s nuclear regulator says it believes that the operator of the crippled Fukushima Daiichi nuclear plant failed to properly vent a vessel containing one of the plant’s reactors in the days after the March 2011 accident.
Tokyo Electric Power Company attempted to vent the containment vessel of the No.2 reactor to lower interior pressure and prevent equipment from being damaged.
The Nuclear Regulation Authority said on Thursday that its analysts examined parts of piping used in the venting.
They said no significant contamination was found on the piping, showing that radioactive gas was not released through the pipes.
The regulator says it believes the venting was not conducted as planned due to unknown reasons.
An investigation by TEPCO also showed a similar result.
It is believed that a massive amount of radioactive gas was released from the No.2 reactor into the environment, but the source of the leak has not been determined.
The regulator plans to look into the level of radioactivity inside the No.3 reactor next month.

December 2, 2019 Posted by | fukushima 2019 | , , | Leave a comment

Possible water leak from Fukushima exhaust stack

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November 28, 2019
The operator of the crippled Fukushima Daiichi nuclear plant says rainwater contaminated by an exhaust stack may be leaking into the ground.
The 120-meter tall chimney was heavily contaminated in the 2011 accident, and rainwater coming out of the duct contains high levels of radioactive substances.
The Tokyo Electric Power Company has installed a concrete box to collect contaminated rainwater.
The box is designed to automatically send the water to designated tanks when the water level exceeds 40 centimeters.
But TEPCO found that the water level falls even when rainwater is not discharged to the tanks.
The company suspects that’s because the concrete box has holes from which the stored water is leaking.
TEPCO says there are no major changes in radioactivity in surrounding groundwater and that it has not confirmed any impact on the environment so far.
But the operator says it will consider measures to prevent leakage.

December 2, 2019 Posted by | fukushima 2019 | , | Leave a comment

Fukushima Journey, Pt. 2: Olympics Propaganda, Thyroid Cancers, Japanese Govt. Lies – 4 days in Fukushima Prefecture w/Beverly Findlay-Kaneko

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November 28, 2019

This Week’s Featured Interview:

  • Fukushima Journey: The “Disappearing” Nuclear Disaster – 4 days on-the-ground in Fukushima Prefecture with Beverly Findlay-Kaneko continues. She lived in Yokohama, Japan for 20 years until March 2011 after the Great Eastern Japan Earthquake. She worked at Yokohama National University and The Japan Times. Beverly has a Master’s degree in East Asian Studies from Stanford University, and speaks Japanese fluently.

    Since returning from Japan, Beverly and her husband, Yuji Kaneko, have been active in raising awareness about nuclear issues, including the nuclear accident at Fukushima. Their main activities have included organizing speaking tours, giving presentations, networking in activist and nuclear-impacted communities in the U.S. and Japan, and co-producing the annual Nuclear Hotseat podcast “Voices from Japan” special on Fukushima.

    This is the second half of the “Fukushima Journey” Nuclear Hotseat interview, based on more than three hours of source material. Pt. 1 appeared in episode #439 from November 19, 2019.

http://nuclearhotseat.com/2019/11/28/fukushima-journey-pt-2-olympics-propaganda-thyroid-cancers/?fbclid=IwAR0Vqp_ERbtbm8kTjQ8T7m6p5NFBvGVp19Z46nG1SK9zfTQKIbdGO7MKN_c

December 2, 2019 Posted by | fukushima 2019 | , , , , , | 1 Comment