It was in July that for the first time they were able to take samples right at the wreck of the submarine, which was a prestige project for the Soviet Union. In 1989, the nuclear submarine sank off Björnön, and has since been at 1,700 meters deep in the Norwegian Sea.
It measured radiation values in some places 800,000 times higher than normal.
Because there are both streams and large bodies of water surrounding the wreck, the researchers believe that it should not have affected people, and in addition, few fish move so deeply. However, radioactivity will continue to be monitored.