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Leakage of liquid from frozen soil wall caused by misalignment of pipe joints TEPCO

January 25, 2022

Leakage of liquid from frozen soil wall caused by misalignment of pipe joints TEPCO

As part of the measures to deal with contaminated water at the Fukushima Daiichi Nuclear Power Plant, liquid used to freeze the ground leaked from the “frozen earth wall” that was installed to prevent underground water from flowing into the buildings. The Tokyo Electric Power Company (TEPCO) is investigating the cause of the damage and replacing the pipes.

On the 16th of this month at the Fukushima Daiichi Nuclear Power Plant, an estimated 4 tons of liquid at minus 30 degrees Celsius, which is used as a “refrigerant” to build a “frozen earth wall” to freeze the ground around the buildings, leaked. The leakage was estimated to be about 4 tons.

Tokyo Electric Power Company (TEPCO) investigated the leak and found that the joints between the pipes that feed the refrigerant and the underground pipes used to freeze the ground had shifted.

The parts of the joint were replaced by the 22nd of this month. The parts of other pipes will be replaced in the future and the cause of the shift of the joint is still being investigated.
https://www3.nhk.or.jp/lnews/fukushima/20220125/6050017050.html?fbclid=IwAR2oxPXF79fFf2r3EpIMvW7CLRrpys6OdsKPbPJuOeGf0_344tVeP6VBaxo

January 26, 2022 Posted by | Fuk 2022 | , , | Leave a comment

TEPCO reports coolant solution leakage at Fukushima nuclear plant

University students rally in front of the Japanese Embassy in South Korea to protest the Japanese government’s decision to dump nuclear wastewater into the sea, in Seoul, April 14, 2021. /CFP

23-Jan-2022

Tokyo Electric Power Company (TEPCO), the operator of Japan’s crippled Fukushima nuclear power plant, has discovered that a coolant solution used to create an ice wall halting groundwater seepage into the reactor buildings has leaked from two storage tanks, Reuters reported on Sunday.

The company claims that there has been no impact on the wall or the environment, according to the report.

Still, it underscores the unpredictable challenges in the clean-up of the site, nearly 11 years after an earthquake and tsunami ravaged Japan’s northeastern coast, causing the world’s worst nuclear disaster since the Chernobyl accident in 1986.

On Sunday, TEPCO spokesperson Tsuyoshi Shiraishi said about four tonnes of a calcium chloride solution used to maintain the ice wall had leaked for the eighth time.

In the last such accident in December 2019, 16 tonnes spilled, likely due to metal fatigue resulting from vibrations caused by construction vehicles, Shiraishi said, adding that TEPCO is “now confirming the reason.”

There was no immediate impact on the wall’s function as it takes several months for the wall to thaw in the absence of coolant, he said.

Work on the underground frozen wall around unit 1-4began in June 2014 to block the flow of groundwater into the plant’s basements, according to China Media Group.

The 1.5-kilometer wall, which became operational in 2017, is made up of 1,568 pipes filled with a refrigerant and inserted 30 meters underground, turning the soil into a solid mass.

Only last year, Japan’s government approved the release of over 1 million tonnes of irradiated water from the site after treatment, starting around spring 2023. TEPCO last month said it would build a tunnel reaching into the sea for the operation.

Separately, a group of six men and women is set to file on January 27 a lawsuit against TEPCO claiming they developed thyroid cancer due to exposure to radiation from the Fukushima disaster, the Mainichi newspaper reported.

https://news.cgtn.com/news/2022-01-23/TEPCO-admits-coolant-solution-leaked-at-Fukushima-nuclear-plant-173qEVNvCPm/index.html

January 24, 2022 Posted by | Fuk 2022 | , , | Leave a comment

Coolant solution leaks at Fukushima Daiichi plant

The frozen wall was a temporary solution for maximum 7 years and the time has run out anyway.

Jan. 22, 2022

The operator of the crippled Fukushima Daiichi nuclear power plant says coolant solution used to create a frozen soil wall around reactor buildings has leaked.

The underground barrier is meant to block groundwater from flowing into the reactor buildings that were damaged as a result of the 2011 earthquake and tsunami.

Tokyo Electric Power Company has been using a calcium chloride solution to maintain the barrier. The firm has been storing the liquid at minus 30 degrees Celsius in four tanks.

TEPCO says liquid levels in two of the tanks dropped on January 16. It says its workers found a pool of the solution near the wall and estimated roughly 4 tons of it had leaked.

The utility says the wall remains capable of keeping groundwater out as it takes several months before the barrier begins to thaw. It adds that the solution does not harm the environment.

TEPCO says the pipe circulating the solution may have been partially damaged. It says it will pinpoint the damaged section and fix it as soon as possible.

January 24, 2022 Posted by | Fuk 2022 | , , | Leave a comment

Japan’s Tepco hit by setback in clean-up of crippled Fukushima nuclear plant

Good faith does not exist in Tepco’s dictionary!

TOKYO, Jan 23 (Reuters) – The operator of Japan’s crippled Fukushima nuclear power plant has found that a coolant solution, used to create an ice wall halting the seepage of groundwater into reactor buildings, has leaked from two storage tanks.

The leakage has had no impact on the wall or environment, said Tokyo Electric Power Co Holdings Inc (Tepco) (9501.T).

Still, it underscores the unpredictable challenges in the clean-up of the site, nearly 11 year after an earthquake and tsunami ravaged Japan’s northeastern coast, causing the world’s worst nuclear disaster since Chernobyl, Ukraine, in 1986.

Only last year, Japan’s government approved the release of over 1 million tonnes of irradiated water from the site after treatment, starting around spring 2023. Tepco last month said it would build a tunnel reaching into the sea for the operation. read more

On Sunday, Tepco spokesperson Tsuyoshi Shiraishi said about four tonnes of a calcium chloride solution used to maintain the ice wall had leaked in what was the eighth such leakage.

“We’re now confirming the reason,” he said.

The last leak in December 2019 saw 16 tonnes spilled, likely due to metal fatigue resulting from vibrations caused by construction vehicles, Shiraishi said.

There was no immediate impact on the wall’s function as it takes several months for the wall to thaw in the absence of coolant, he said.

Separately, a group of six men and women is set to file on Jan. 27 a lawsuit against Tepco claiming they developed thyroid cancer due to exposure to radiation from the Fukushima disaster, the Mainichi newspaper reported.

The plaintiffs, who were minors living in Fukushima prefecture at the time of the 2011 disaster, are seeking 616 million yen ($5.42 million) in compensation from the electricity provider, the Mainichi said.

If the complaint was served, Tepco would respond in good faith after hearing the contents of the claims and arguments in detail, the firm said in a statement.

https://www.reuters.com/world/asia-pacific/japans-tepco-hit-by-setback-clean-up-crippled-fukushima-nuclear-plant-2022-01-23/

January 24, 2022 Posted by | Fuk 2022 | , , | Leave a comment

Leakage of 4 tons of liquid at minus 30 degrees Celsius at Fukushima Daiichi Nuclear Power Plant

The frozen wall was a temporary solution for maximum 7 years and the time has run out anyway.

January 23, 2022

There was a problem at the Fukushima Daiichi Nuclear Power Plant where about 4 tons of liquid leaked out of a pipe that was injected into the ground to freeze the ground as part of the “frozen earth wall” that forms an “ice wall” around the buildings to prevent the inflow of underground water. Tokyo Electric Power Company (TEPCO) believes that a part of the pipe may have been damaged, and has decided to hurry to identify the location and repair it.

According to TEPCO, on January 16, the water level dropped in two of the four tanks that contain liquid at minus 30 degrees Celsius, which is used to freeze the ground around the buildings at the Fukushima Daiichi Nuclear Power Plant, and when they checked the area around the frost wall, they found a place where this liquid had accumulated.

The leaked liquid is a calcium chloride solution that acts as a “refrigerant” to freeze the ground, and it is estimated that about 4 tons of the liquid leaked from the water level of the tanks.

Even if the refrigerant leaks out, there is still a few months before the freezing wall itself starts to melt, so it is still functioning to prevent the inflow of groundwater, according to the report.

Tokyo Electric Power Company (TEPCO) believes that part of the pipe may have been damaged, and is hurrying to identify the location and repair it.

The freezing wall has been in operation since 2016, but last year some parts of the freezing wall experienced problems with the underground temperature remaining above 0 degrees Celsius, and TEPCO is investigating the cause and taking countermeasures.
https://www3.nhk.or.jp/news/html/20220123/k10013445291000.html?fbclid=IwAR06soHF-koVniJxnYVyMeADSSul3AXZTrGbMAW7folqVBtmfgk93cS5TLs

January 24, 2022 Posted by | Fuk 2022 | , , | Leave a comment

Test to stop water leakage conducted in Fukushima

 

A research institute working on decommissioning the Fukushima Nuclear Power Plant has started testing a method to stop leakage of highly contaminated water.

Nuclear fuels in reactors No. 1 through No. 3 melted during the 2011accident. This caused highly contaminated water to flow into the containment vessels outside the reactors.

It’s believed the water is leaking inside the buildings through cracks in equipment that link the reactor with the containment vessel.

The International Research Institute for Nuclear Decommissioning is developing a method to fill the equipment with concrete.

The institute has started testing the new method at its facility in Naraha Town, Fukushima Prefecture.

Mock equipment containing water was set up in a building at the facility.

Concrete was poured into it through pipes and hoses.

The test is being remotely controlled, with the height of the accumulating concrete measured every 10 minutes.

About 200 cubic meters, or 4,800 tons of concrete will be infused over an 8-hour period.

Researchers at the institute say they will see if the concrete will solidify and stop the water leakage.

https://www3.nhk.or.jp/nhkworld/en/news/20170624_16/

June 26, 2017 Posted by | Fukushima 2017 | , , | Leave a comment

Prosecutors innocent TEPCO over radioactive water leakage into the ocean

The court said there is no evidence that proves that radioactive water flew out of the Fukushima nuclear power plant to the ocean. I hope this would finally convince those who haven’t been convinced that the state of Japan denies truth and violates peoples lives. Its time to get rid of Abe et al.

Prosecutors drop TEPCO case over radioactive water leakage

FUKUSHIMA–The Fukushima District Public Prosecutor’s Office announced on March 29 that it will not prosecute Tokyo Electric Power Co. or its executives for violating an environmental pollution law.

The decision came two and a half years after a group of plaintiffs, including residents of Fukushima Prefecture, filed a criminal complaint against TEPCO, operator of the crippled Fukushima No. 1 nuclear power plant, and its 32 current and former executives.

The group sought to bring charges against the utility and its executives for allowing radioactive contaminated water to be discharged into the sea.

In its decision, the prosecutors said there was “insufficient” evidence to press charges against TEPCO and some of its executives, including Naomi Hirose, company president. The remaining executives, the prosecutors said, “had no authority or responsibility to set measures to avoid the leakage in the first place,” therefore, the accusation has “no grounds.”

“The Fukushima police investigated the case for almost two years. It is extremely disappointing,” said Ruiko Muto, 62, the head of the plaintiff’s group, at a news conference in Tokyo on March 29. “We wanted them to look into the case further. We can’t accept this decision.”

The group is planning to appeal to the Committee for the Inquest of Prosecution. The group will meet with its lawyers on March 30 and decide on whether it will pursue further action.

http://ajw.asahi.com/article/0311disaster/fukushima/AJ201603300068

Charges ruled out for Tepco figures over Fukushima No. 1 radioactive water spillage into sea

FUKUSHIMA – Public prosecutors decided on Tuesday not to indict Tokyo Electric Power Co. President Naomi Hirose and other current and former executives of the utility over radioactive water leaks from the crippled Fukushima No. 1 nuclear power plant into the ocean.

Sufficient evidence was not found, the Fukushima District Public Prosecutor’s Office said.

In September 2013, a civic group filed a criminal complaint against 32 current and former Tepco executives, including Hirose and Tsunehisa Katsumata, former chairman of the operator of the northeastern nuclear power plant, saying tainted water leaked from storage tanks into the ocean due to their failure to take preventive measures.

Through its investigation, the Fukushima Prefectural Police concluded that some 300 tons of stored radioactive water had flowed into the sea as of July 2013 because Tepco executives neglected to monitor the tanks or take leak-prevention measures, and sent the case to the prosecutors last October.

The prosecutors said there was no evidence supporting the allegation that the leaked tainted water was carried into the sea by groundwater at the plant, which suffered meltdowns following the massive earthquake and tsunami in March 2011.

The group said it will ask for a prosecution inquest panel’s investigation.

http://www.japantimes.co.jp/news/2016/03/30/national/crime-legal/charges-ruled-tepco-figures-fukushima-no-1-radioactive-water-spillage-sea/#.VvtU1-IrLIU

 

March 30, 2016 Posted by | Fukushima 2016 | , , , , , , | Leave a comment