#Nuclear reactor meltdown fukushima full
#Nuclear reactor meltdown fukushima plus

Then in March 2011, everything fell apart. Haruo Ono from Shinchi Town, Fukushima was born into a family of three generations of fishermen, and has helped out with the family business from as early as he can remember. “The ocean’s alive, too, you know!” The hand that gripped the newspaper turned white. As he scanned the newspaper in his home, his eyes came to rest on an article and comments about the plan, announced by TEPCO the previous day, to discharge radioactive water from the Fukushima Daiichi Nuclear Power Station into the ocean. “How can such a thing be allowed to happen,” sighed Mr. © Greenpeace It has taken us 10 years to get to where we are Greenpeace Japan has been regularly conducting radiation survey in the Fukushima Prefecture after the meltdown of the Fukushima Daiichi Nuclear Power Station in March 2011, and conducted its 33rd survey in November 2021. Ono opens up about the pain he feels, saying that discharging radioactive water into the ocean will throw Fukushima’s fishing industry back down into the abyss. In November, Greenpeace conducted its 33rd Fukushima radiation survey since the nuclear disaster, during which we had the opportunity to interview local fisherman Mr. TEPCO’s plan is to build a pipeline along the ocean bed and release diluted processed radioactive water 1 km off the coast of Fukushima.

#Nuclear reactor meltdown fukushima full

Full scale frozen soil barrier operations are to begin after authorization from NRA.In April 2021, the Japanese government decided to discharge radioactive water stored inside the TEPCO Fukushima Daiichi Nuclear Power Station into the Pacific Ocean. TEPCO is currently working with the Japanese Nuclear Regulatory Authority (NRA), providing operational plans/strategies for the frozen soil barrier and modeling results of the projected performance. These factors increase the confidence in the frozen soil barrier project underway at Fukushima. The on-site pilot test at Fukushima indicated predictable ground freezing and supported the full scale design parameters. The scale of the Fukushima barrier is bounded by industry experience and the equipment and infrastructure proposed for the ground freezing is well understood. The DOE laboratory independent assessment of the frozen soil barrier concluded that the technical characteristics of a frozen barrier are relatively well suited to Fukushima-specific hydrogeologic conditions and the need for reducing the inflow of water into damaged reactors at the F1 Site. Construction of the refrigeration plant is complete and all of the above ground piping/manifolds are in the final stages of construction. Drilling of all of the boreholes was completed November 9, 2015.

#Nuclear reactor meltdown fukushima plus

The barrier required 1927 total boreholes: 1568 for freeze pipes plus 359 for temperature monitoring arrays. The frozen soil barrier design extends to about 30 m depth the bottom of the barrier is in a low permeability interval, and the total barrier length around the reactors is just over 1.5 km. A group of scientists and engineers from US Department of Energy National Laboratories provided independent evaluation of the frozen barrier design and operational plans along with technical recommendations to the TEPCO team. The frozen soil barrier was designed and installed by a team from TEPCO and Kajima Corporation.

The frozen barrier is intended to limit the flow of water into the area, reduce the amount of water entering damaged reactors, and reduce the resulting volume of contaminated water that requires treatment and storage. One of the key countermeasures is a frozen soil barrier encircling more » the damaged reactor facilities. In general, the strategy represents an example of a 'defense in depth' concept that is used for nuclear facilities around the world. The diverse countermeasures work together in an integrated manner to provide different types, and several levels, of environmental protection. In response, the Tokyo Electric Power Company (TEPCO) is implementing a number of countermeasures to limit the releases and impacts of contaminated water to the surrounding environment.

Reactor buildings and support facilities at the Fukushima Daiichi Nuclear Power Station (F1 Site) were damaged by a March 2011 tsunami.