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Chart of the Day: Japan to launch Fukushima wastewater from Thursday

Japan will begin releasing handled radioactive wastewater from the wrecked Fukushima nuclear plant on Thursday in defiance of fierce objections from the worldwide group, stated the plant’s operator, Tokyo Electric Power (TEPCO), when saying an in depth plan on Tuesday.

The first discharge will whole 7,800 cubic meters of handled water over about 17 days. The operator plans to launch 31,200 tonnes of the handled water by the tip of March 2024, with an emission of tritium at 5 megabecquerels, about 20 p.c of TEPCO’s annual discharge restrict.

The plan got here months after controversy, as authorities and specialists are divided on the chance the radioactive substance tritium, which the wastewater accommodates and cannot be eliminated by the water filtration expertise, could pose.

Advanced Liquid Processing System is the expertise that TEPCO used to take away the radioactive supplies from the wastewater. Over the years, the wastewater has been regularly handled to filter out all of the detachable dangerous components besides tritium, then saved in tanks.

The operator constructed over 1,000 metal tanks on the location with a capability of about 1.37 million cubic meters. As of August 3, 2023, over 1.34 million cubic meters of nuclear wastewater are presently saved within the tanks, which is 98 p.c of the full capability, based on TEPCO.

As the area is working out, the operator stated constructing extra tanks is not an choice, and it has to release area to securely decommission the plant. Under TEPCO’s plan, it will take as much as 30 years and even longer for wastewater to be launched into the ocean.

The nuclear wastewater will likely be closely diluted with clear water to a fortieth of the focus of radioactive materials permitted underneath Japanese security requirements earlier than being pumped into the Pacific Ocean through an undersea tunnel a kilometer off the coast.

Nuclear wastewater has elementary variations from the discharge of a usually operated nuclear plant, both when it comes to the unique supply, class of radionuclides, or disposal therapy, stated Wang Wenbin, a Chinese Foreign Ministry spokesperson, in July. 

The Fukushima wastewater got here from the cooling water injected into the melted reactor core after the nuclear accident, in addition to groundwater and rainwater that permeated the reactor. The nuclear accident, which occurred on March 11, 2011, was attributable to the devastating earthquake and tsunami.

Source: CGTN