Search - Number 24 - COMPOSITION AND CONCENTRATIONS OF RADIOACTIVE AEROSOLS NEAR LAVALIKED FUEL CONTAINED MATERIALS IN PREMISE 210/7 OF THE OBJECT “UKRITTYA”

COMPOSITION AND CONCENTRATIONS OF RADIOACTIVE AEROSOLS NEAR LAVALIKED FUEL CONTAINED MATERIALS IN PREMISE 210/7 OF THE OBJECT “UKRITTYA”
Cover not present COMPOSITION AND CONCENTRATIONS OF RADIOACTIVE AEROSOLS NEAR LAVALIKED FUEL CONTAINED MATERIALS IN PREMISE 210/7 OF THE OBJECT “UKRITTYA”
Category: Number 24
Publication: 24
Summary

Composition, concentrations and dispersity of radiactive aerosols in premise 210/7 of the ”Ukryttya” object in 2013 are presented. The sumples were taken on Petryanov three-layer filtrs near south-west side of lavaliked fuel contained materials. It was stated that concentration of beta-radiating (Σβ) aerosol-carriers (90Sr + 90Y and 137Cs) was fluctuating with the range 0.2 – 180 Bq/m3. Besides, 137Cs share made 50 %. Ratio 137Cs/241Am concentrations was close to 140 and 241Am/154Eu – to 6 – 7. Theirs carriers were the particles of size more than 1 μm. Gamma-spectrometric measurements have demonstrated that content and ratio of radionuclides in aerosols were other than in sumples of the lavaliked fuel contained materials. Maximum volume activity of radon reached 100 Bq/m3. 212Pb concentrations – thoron daugther products were fluctuating with the range 0.5 – 36 Bq/m3. Theirs carriers were the particles of size, prevailing, 0.1 μm.

Keywords: ”Ukryttya” object, lavaliked fuel contained materials, radioactive materials, concentration, dispersity, radon, thoron, daugther products of radon and thoron.

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