The individuals' 1-131 exposure from the Chornobyl accident had been estimated using individual radioactivity measurements taken within two months of the accident, interview data, and ecological models of the fallout pattern
. The study participants also were screened for thyroid cancer and other thyroid diseases a total of four times between 1998 and 2007.
In the 1950s for example, government officials notified suppliers of photographic film of expected fallout patterns
so they could protect their film, but did not share the information with milk producers.
The maps were drawn up by applying the fallout patterns
from the Chernobyl explosion 20 years ago and adapting them to a similar disaster at Wylfa.
Ortmeyer says the officials also knew details of fallout patterns
. After Eastman Kodak Co.
The passage of the Chernobyl plume over Finland led to various fallout patterns
for different radionuclides.