Archipelago Novaya Zemlya will be free of radioactive cesium in 150 years
«The maximal level of contamination of soils by radioactive cesium is found on the south cap of the archipelago Novaya Zemlya which is the part of Archangelsk Region. The most contaminated bottom sediments are located in the water area situated in the south-east part of the Barents Sea bordering on the south cape of the archipelago. The period of half-decay of radiocesium is about 30.2 years. According to our estimations, the soils in this region will reach the background radioactivity in 100−120 years, while the bottom sediments will be free of cesium in 100−150 years,» - Grigoriev said.
In their estimations, the researchers have taken into account the nuclear explosion, emergency cases at atomic industry and power plants, and radioactive emissions. The most substantial impact to the overall level of contamination of the archipelago has been made by the Chernobyl accident in 1986 and nuclear test operations on the Central Nuclear Ground on the archipelago Novaya Zemlya between Barents and Kara Seas which took place from 1955 on