Search - Number 16 - RADIOACTIVE AEROSOLS OF OBJECT “UKRYTTYA” 304/3 ROOM AND DUST GENERATING ABILITY IN IT

RADIOACTIVE AEROSOLS OF OBJECT “UKRYTTYA” 304/3 ROOM AND DUST GENERATING ABILITY IN IT
Cover not present RADIOACTIVE AEROSOLS OF OBJECT “UKRYTTYA” 304/3 ROOM AND DUST GENERATING ABILITY IN IT
Category: Number 16
Publication: 16
Summary

During 2009 - 2011 years was made monitoring of radioactive aerosol (RA) in object "Ukryttya" la-va fuels containing materials (LFCM) containing premise 304/3. Researches were provided on distribution RA volumetric concentrations which contained long-living alpha-, beta-emitters, separately 137Cs and 212Pb among three groups of aerodynamical diameter sizes ? 2,0 ?m, ? 0,6 ?m but ? 2,0 ?m, and ? 0,6 ?m Pres-ence of fuel RA and containing only 137Cs RA with average concentrations of 2?10-3 and 10-1 Bk/m3 in year was defined. In fuel RA concentration of 90Sr to concentration of ?-emitters ratio is 1,5 times more than for 24 year exposure fuel but for 137Cs it is 1,5 - 2 times less. Is expected that compensation of subsided part of RA, occurs by particles with radio nuclides tearing off from LFCM surface. Fuel RA measured concentra-tions can be came up if surface contamination density by these particles will be commensurable with LFCM radio nuclides density. Arguments for the benefit of these particles layer, forming out of LFCM surface fragment given. Increment of fuel RA fine dispersed fraction concentration exposed with value of (5 ± 3,1)·10-5 Bk/m3 in year.

Keywords: object "Ukryttya" radioactive aerosol, fuel aerosol, LFCM surface, virtual impactor.

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