The Ministry of Education and Science of Japan today announced that in the soil located 45 kilometers to the northwest of the nuclear power plant "Fukushima-1" village and 5 places discovered plutonium. This is the first detection of plutonium by the Japanese government, the release of which occurred in the nuclear power plant accident, outside the territory of the nuclear power plant "Fukushima-1". However, the Ministry of Education and Science reported that the plutonium concentration is extremely low, the radioactivity of it as low.
The half-life of plutonium is an extremely long one. Plutonium can enter the human body in the breathing process and other ways and has a strong carcinogenic effect. Since the density of plutonium is very high, previously it was thought that he is not likely to be smashed away. In connection with this company, "Tokyo Electric Power" reported that after the accident at the nuclear power plant "Fukushima-1" plutonium could spread over large distances with water vapor or dust. In June and July, the Ministry of Education and Science of Japan collected soil samples at 100 locations within 80 km from the nuclear power plant "Fukushima-1" to explore the content of plutonium and other radioactive substances. Of the six sites where detected plutonium, the most remote village is 45 kilometers from the nuclear power plant, plutonium-238, it reaches 0.82 becquerels per square meter, the total amount of plutonium-239 and plutonium-240 is 2.5 becquerels per square meter .
The Ministry of Education and Science of Japan has also conducted research on the content of the radioactive element strontium. Of the 100 sites where samples were collected for the study, strontium because of the accident at the nuclear power plant is found in dozens of places, including several located about 80 km from the plant. This confirms the fact that strontium also spread to a great distance.