Search - Number 25 - CHARACTERISTICS OF RADIOACTIVE AEROSOLS IN 2014 NEAR LAVALIKED FUEL CONTAINED MATERIALS IN PREMISE 012/15 OF THE “UKRYTTYA” OBJECT

CHARACTERISTICS OF RADIOACTIVE AEROSOLS IN 2014 NEAR LAVALIKED FUEL CONTAINED MATERIALS IN PREMISE 012/15 OF THE “UKRYTTYA” OBJECT
Cover not present CHARACTERISTICS OF RADIOACTIVE AEROSOLS IN 2014  NEAR LAVALIKED FUEL CONTAINED MATERIALS IN PREMISE 012/15 OF THE “UKRYTTYA” OBJECT
Category: Number 25
Publication: 25
Summary

Composition, concentrations and dispersity of radioactive aerosols in 2014 in premise 012/15 of the ”Ukryttya” object, were are existed the lavaliked fuel contained materials (LCFM) are presented. The sumples were taken on Petryanov´s three-layer filters. At the same time concentrations of radon, thoron and their daugther products were definition with help of the seismic radon station and of radiometer “Alfarad plus A”. It was stated that concentration of beta-radiating (Σβ) aerosol-carriers (90Sr+90Y and 137Cs) was fluctuating with the range 0.2 – 3 Bq/m3. Besides, 137Cs share made 30 – 40 %. Ratio of 137Cs/241Am concentrations was close to 150. Radionuclide carriers were aerosols with AMAD near 1 μm. Gamma-spectrometric measurements have demonstrated that ratios of radionuclides-products ChNPP Unit 4 accident in aerosol samples and LCFM specimens were characteristically different. It mean that LCFM destruction  is altered slightly. Maximum volume activity of radon reached 200 – 300 Bq/m3. 212Pb concentrations – thoron daugther products were fluctuating within the range 0.7 – 33 Bq/m3, and its carriers were the particles of diameter, prevailing, 0.1 – 0.3 μm.

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

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