In view of
publication in Mass Media of information on detection of minimal iodine-131
content in European countries, SNRIU informs on the following. In accordance
with the information of the nuclear regulatory authorities of the European
Union, small amount of
radioactive iodine was detected in the outdoor air in several European
countries in January 2017. Presence of iodine-131, content of which could exceed
sensitivity of measuring equipment, was registered in Finland, Norway, Poland,
Czech Republic, Germany, France and Spain.
According to information of the Norwegian
Radiation Protection Authority (NRPA), minimum
detectable level of radioactive iodine of 0,5 µBq/m3
during second week of January 2017 was registered at the Svanhovd
According to information of the Finnish Radiation and Nuclear Safety Authority
(STUK), the amount of iodine-131 in the atmosphere was
very small, but detectable in the samples collected at the air radioactivity
monitoring stations in Rovaniemi (0,27 µBq/m3)
and Kotka (0,3 µBq/m3) in January 2017.
According to information provided by the French Institute for Radiation Protection and
Nuclear Safety (IRSN), minimum content of the iodine
isotope was detected at the level of 0,1 – 0,31 µBq/m3 in January 2017 in France.
The existing Ukrainian radiation and ecological
monitoring system ensures continuous monitoring of the radiation state of the
surface outdoor air by taking air samples using stationary equipment.
According to information provided by the SSE “Ecocenter” the radionuclide 131I was detected in the air
samples taken in the Exclusion Zone in the period from 24 to 30 January 2017 at
the automated radiation situation monitoring system points (ARMS). The volume
activity of the detected radionuclide did not exceed 0,6
µBq/m3 – 0,9 µBq/m3. The volume activity
from 0,6 µBq/m3 to 1,6 µBq/m3 was
registered in the air samples taken in the period from 27 January 2017 to 03
February 2017 at ARMS.
According to data received from the ARMS points by present time
and analyzed meteorological conditions, most likely, the contamination
was spread from the north-eastern and south-eastern directions. The origin of
the iodine isotope is unidentified, but normally, iodine-131 is used for
medical purposes in many countries of the world.
We emphasize, that
the registered 131I levels are much lower than the permissible
concentration level, and do not pose any threat to human health. The permissible
concentration of the iodine-131
is 4 Bq/m3, or 4 000 000 µBq/m3.