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A small amount of atmospheric radioactive iodine again in Rovaniemi

A small amount of atmospheric radioactive iodine again in Rovaniemi

3 Mar 2017 16:38
Webnews

The Radiation and Nuclear Safety Authority of Finland detected a radioactive isotope of iodine in the air in Rovaniemi at the end of February. The atmospheric concentration of Iodine-131 in the measurement period 20–27 February was 0.3 microbecquerels per cubic metre of air. This is a detectable but very small amount.

The finding in Rovaniemi was the only one made in Finland in late February. The last time that radioactive iodine was measured was in samples collected from the second week of January to the start of February. At that time, radioactive iodine was detected both in Rovaniemi and in Kotka.

In January and the first days of February, iodine was detected in many other European cities also. The concentrations in all the places the isotope in question, iodine-131, were so small that they posed no threat to humans or the environment.

The origin of the iodine is still unknown. Iodine 131 is commonly used for medical purposes to treat hyperthyroidism and thyroid cancer, and it is produced in many countries worldwide.

Addition 8 March:

The air particle sample collected in Kajaani in the period of 7 February to 28 February also contained iodine-131. The concentration in Kajaani was 0.3 microbecquerels per cubic metre of air. The Kajaani collection period was 21 days long, and the measurement results were ready on Monday 6 March. It is possible that the iodine detected in Kajaani originated from the same source, and from the same emission, as the iodine detected in Rovaniemi at the end February.

 

More information:

Radioactivity in outdoor air

Head of Laboratory Maarit Muikku, tel. +358 9 759 88 509
Communication Specialist Risto Isaksson, tel. +358 9 759 88 208

Environmental radiation
Updated
8 Mar 2017 10:44
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