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Radioactivity in the Air of Zagreb in the Year 2011

The monitoring of radioactivity in the air on a regular daily basis is being carried out at the Institute for Medical Research and Occupational Health, Zagreb (IMI). Monitoring includes absorbed dose rate measurement, determination of total beta activity in the air, gammaspectrometric determination of radioactivity in the air by large-volume air sampling on cellulose filters, determination of quantity of particulate matter with a defined aerodynamic diameter (PM10) etc. Tragic events in Japan on March 2011 have resulted with a relatively large amount of radioactivity released into the atmosphere. Since then, from 11th March onward, no significant increase of the absorbed dose rate has been observed at the IMI location in Zagreb.

absorbed dose rate; PM10 particle fraction; total beta activity; 131I and 134Cs

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