On the 27th, Tokyo Electric Power Company (TEPCO) released the work status of the Fukushima Daiichi Nuclear Power Plant (Okuma Town and Futaba Town, Fukushima Prefecture) to the press regarding the discharge of water after purification treatment to the sea. (Kenta Onozawa)
◆To ensure safety, the state of water falling into the tank is not disclosed.
Four days after the start of release on the 24th. When I stood near the water tank that was directly connected to the undersea tunnel, I could hear the water sound like a waterfall. The water, a mixture of treated water and seawater, appears to be falling into a tank about 18 meters deep, and it smells like the sea.
The upper part (back) of the aquarium directly connected to the undersea tunnel. The sound of water mixed with treated water and seawater falling can be heard = at Tokyo Electric Power Company’s Fukushima Daiichi Nuclear Power Plant on the 27th (representative photo)
The water level in this tank is higher than the sea level. Treated water flows through the tunnel and out to sea from an outlet about 1 km offshore. For safety reasons, TEPCO did not allow people to see or take pictures of water falling into the tank.
The discharge will be carried out continuously for 24 hours, and as the first discharge, about 7,800 tons of treated water will be discharged into the sea over 17 days. On this day, approximately 19 tons of treated water was pumped out every hour, mixed with more than 700 times that amount of seawater, and put into the tank.
Operation of discharge equipment such as pumps is carried out in two shifts a day by one team of nine people. In the control room, a graph of the water level of the tank that stores the treated water prior to discharge was displayed on the computer screen. It was found that the water level gradually decreased and the amount of treated water decreased steadily.
According to TEPCO, there have been no abnormalities in the release work so far, and the tritium concentrations measured in the surrounding seawater that have been found so far have all fallen below the lower limit of what the equipment can detect. A spokesperson for TEPCO emphasized, “We are proceeding as planned. We will be able to dismantle the tank by releasing it and build new facilities for decommissioning on the vacant site.”
Discharge of treated water from the Fukushima Daiichi Nuclear Power Plant into the oceanContaminated water generated during the cooling work of melted nuclear fuel (debris) in Units 1 to 3 has been purified by the “Multi-Nuclear Species Removal System (ALPS)”. Radioactive tritium remains unremoved. The treated water is mixed with a large amount of seawater to reduce the tritium concentration to less than 1/40 of the national wastewater standard, and then discharged from the seafloor about 1km offshore. The release is expected to take about 30 years.
2023-08-27 12:46:28
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