Search - Number 24 - CONTROL OF RELEASES OF RADIOACTIVE AEROSOLS FROM OBJECT “UKRYTTYA” IN 2014

CONTROL OF RELEASES OF RADIOACTIVE AEROSOLS FROM OBJECT “UKRYTTYA” IN 2014
Cover not present CONTROL OF RELEASES OF RADIOACTIVE AEROSOLS FROM OBJECT “UKRYTTYA” IN 2014
Category: Number 24
Publication: 24
Summary

The results of control of radioactive particulate emission are presented from the object “Ukryttya” in 2014. The maximal rate of unorganized releases of beta-radiating products of Chernobyl accident was in winter period and reached 3.6 MBq/day. The concentration of long-lived beta-radiating aerosols released in atmosphere from system “Bypass” was within the range 0.3 – 5 Bq/m3 (maximal concentration was 14 Bq/m3). Them carriers were particles with active median aerodynamic diameter (AMAD) 0.6 – 6 µm. Mean ratio of concentrations were: 137Cs/241Am = 97 и 241Am/154Eu = 6.2. The concentration of 212Pb – daughter products of thoron consisted as a rule 0.8 – 4 Bq/m3. Maximal concentration of 212Pb aerosols was 9 Bq/m3. The relation of concentrations of daughter products of radon and thoron and 212Pb were about 4. They have AMAD 0.06 0.3 µm. A volume activity and dispersity of radioactive aerosols in releases from object “Ukryttya” remain constant the last ten years.

Keywords: object “Ukryttya”, aerosols, volume activity, activity median aerodynamic diameter.

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