Search - Number 12 - AEROSOL CHARACTERISTIC RESEARCHING IN BASIC FUEL-CONTAINING PREMISES AT OBJECT “UKRYTTYA”

AEROSOL CHARACTERISTIC RESEARCHING IN BASIC FUEL-CONTAINING PREMISES AT OBJECT “UKRYTTYA”
Cover not present AEROSOL CHARACTERISTIC RESEARCHING IN BASIC FUEL-CONTAINING PREMISES AT OBJECT “UKRYTTYA”
Category: Number 12
Publication: 12
Summary

During 2008 - 2009 years was made monitoring of radioactive aerosol (r/a) in under-reactor premises (p) No 304/3, 305/2 of object "Ukryttya". Researches were provided on distribution among three groups of sizes (aerodynamical diameter (AD) ? 2,0 ?m, AD ? 0,6 ?m bat ? 2,0 ?m, and AD ? 0,6 ?m) and total volumetric concentrations (VC) of r/a which contained long-living (LL) alpha-, beta-emitters, separately 137Cs and 212Pb. Ratio for VC of r/a which contain 137Cs to concentration of r/a with all LL beta emitters for groups with AD ? 0,6 и ?0,6 µm is 0,58 and 0,72 respectively and ratio VC r/a with all LL beta-emitters to r/a which contained alpha-emitters for same groups is 110 and 300 respectively. Tendency to increase of VC alpha-emitters fine r/a component is discovered. Increase speed is from 103 to 104 fuel particles in volume 10-3 ?m3 per month from 1 m3 of analyzed air. Aerosol dimensions' bimodal distribution characterize experimental data well.
Keywords: object "Ukryttya" radioactive aerosol, submicron aerosol, virtual impactor.