Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Study of atmosphere parameters of the IVV-2M reactor hall

  • M.E. Vasyanovich (Institute of Industrial Ecology UB RAS) ;
  • M.V. Zhukovsky (Institute of Industrial Ecology UB RAS) ;
  • E.I. Nazarov (Institute of Industrial Ecology UB RAS) ;
  • I.M. Russkikh (Research Institute of Nuclear Materials)
  • Received : 2022.12.12
  • Accepted : 2023.07.05
  • Published : 2023.11.25
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Abstract

The paper presents the results of a study of radioactive noble gases and from decay products in the atmosphere of the reactor hall of the research nuclear reactor IVV-2M. The distribution of short-lived 88Rb and 138Cs activity by sizes of aerosol particles was measured in the range of 0.5-1000 nm. It is shown that radioactive aerosols are characterized by three main modes with AMTD 2-3 nm, 7-15 nm and 400 nm. About 70% of aerosol activity is due to 88Rb. The equilibrium factor between 88Kr and 88Rb is 0.2 ± 0.1. The total concentration of aerosols particles was measured using an aerosol diffusion spectrometer. The value of unattached fraction of radioactive aerosols in the atmosphere of reactor hall IVV2M was f = 0.15-0.25 at the average total aerosol particles concentration from 20,000 cm3 to 53,000 cm3.

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