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

To prevent high radioactive waste water from Fukushima first nuclear power The station spread to the sea, and Tokyo electric power company began to carry out water blocking works on the 9 th. Emitting low radioactivity into the sea sewage The day of homework also came to an end.

Tokyo electric power company began to carry out the "iron plate blocking" project before the sluice of unit 2 of Fukushima No. 1 nuclear power plant, which had been leaked radioactive waste on the 9 day. The iron plate is 4 meters wide and 8 meters high, a total of 7 pieces, which are directly inserted into the sea bottom from the sea surface.

In addition, the Tokyo electric power company is also preparing to set up a sand blocking net at the front of the unit 2 sluice, near the dyke near the south side of unit 4, and 3 outlets of the north side sluice gate. Sand blocking nets are made of polyester materials and are usually used in river or coastal engineering to prevent the spread of dirty water. The sand blocking net has floats and heavy objects floating on the water surface and sinking to the bottom of the sea. Its height is 10 meters and its width is 120 meters.

As the embankment on the south side of the nuclear power plant has been partially damaged, Tokyo electric power company is considering installing iron plates in the sea near the embankment to prevent the sewage from flowing out.

Japanese nuclear research and development agency researcher Zhong Ye Zheng also speculated that the radioactive materials discharged into the sea at the Fukushima Dai Ichi nuclear power plant can reach North America after 5 years of ocean currents, and reach the eastern part of Asia 10 years later. After 30 years, it will almost spread to the entire Pacific Ocean. However, even if the 20 thousand tons of high radioactive waste water in the nuclear power plant is still leaking into the sea at present, the radioactive activity in its diffusion area will also be diluted to less than 1 BKR in less than 1 years.

Aoyama Michio, a researcher at the Japan Meteorological Research Institute, said that although the concentration of radioactive substances would be very low as time went by and sea water spread, it would be difficult to recover radioactive materials once it was leaked in accordance with current technological conditions. Therefore, it is necessary to strengthen monitoring to see if it will accumulate in food organisms through the food chain.