Cesium-137 is a radioactive isotope of cesium, which is formed during the fission of nuclei in nuclear reactorsNPP. It is one of the main components of the pollution of the biosphere and at high concentrations represents a mortal danger to humans.
The collection of sand and groundwater samples on the coast of Fukushima Prefecture and their analysis was conducted in 2013-2016. It turned out that the level of radiocaesium in brackish groundwaters was about 10 times higher than in the harbor near the nuclear power plant itself. According to scientists, after the disaster in 2011, a large number of radionuclides were released into the environment, which fell into the sea current and were spread along the shore.
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