Fukushima Radioactive Sewage Will Spread To The Entire Pacific Ocean 30 Years Later

To prevent highly radioactive sewage from Fukushima first nuclear power The station spread to the sea, and Tokyo Electric Power Company began to implement the water blocking project on the 9th. Discharge of low radioactivity into the sea sewage The day of the operation also came to an end.

Tokyo Electric Power Company began to implement the "iron plate blocking" project in front of the sluice gate of Unit 2 of Fukushima Daiichi Nuclear Power Station, where radioactive sewage leaked, on the 9th. The iron plates are 4 meters wide and 8 meters high, with a total of 7 pieces, straight from the sea to the sea floor.

In addition, Tokyo Electric Power Company also plans to set up sand retaining nets in front of the Unit 2 sluice, near the dike on the south side of Unit 4 and at the entrance of the sluice on the north side. The sand screen is made of polyester material and is usually used in river or coastal works to prevent the spread of dirty water. This sand trap has floats and weights, which float on the water surface while sinking into the sea bottom, with a height of 10 meters and a width of 120 meters.

As the dike on the south side of the nuclear power plant has been partially damaged, Tokyo Electric Power Company is considering setting iron plates in the sea beside the dike to prevent sewage from flowing out, in addition to stacking sandbags.

Nakano Masato, a researcher at the Japan Atomic Energy Research and Development Agency, speculated that the radioactive materials discharged into the sea by the Fukushima Daiichi Nuclear Power Station could reach North America five years later, reach eastern Asia 10 years later, and almost spread to the entire Pacific Ocean 30 years later. However, even though 20000 tons of highly radioactive sewage still exists in the nuclear power station at present has leaked into the sea, The radioactivity in the diffusion area will also be diluted to less than 1 Becquerel per liter in one year, and less than 0. 5% in 10 years 1 Becquerel will not affect the human body.

Aoyama Daofu, a researcher at the Japan Meteorological Research Institute, said that although the concentration of radioactive substances will become very low as time goes on and seawater spreads, according to the current technical conditions, once radioactive substances leak, it will be difficult to recover them. Therefore, it is necessary to strengthen monitoring and pay attention to whether they will accumulate in organisms through the food chain.