The Effect of Dustiness of Combustion Products and Coagulation Processes on the Parameters of Submicron Particles Resulting from Coal Burning

Kortsenshteyn, N. M.; Petrov, L. V.

doi:10.1134/s1061933x19030086

Cited by 1 publication

(3 citation statements)

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“…The general matters of heterogeneous condensation are considered in the fundamental reviews [2,3]. In the general case, in modeling heterogeneous condensation, the question about taking into account the polydispersity of condensation nuclei arises.…”

Section: Nuclear Power Plantsmentioning

confidence: 99%

“…The kinetic equation for solid particles is given by (2) where is the size distribution function of particles with a condensate layer on their surfaces, m -1 kg -1 . The right-hand side of equation ( 2) is equal to zero because the number of particles is constant and is equal to the number of heterogeneous condensation nuclei.…”

Section: Aerosol Particles' Nucleationmentioning

confidence: 99%

“…The right-hand side of equation ( 2) is equal to zero because the number of particles is constant and is equal to the number of heterogeneous condensation nuclei. Similarly to [2], the initial conditions for equations (1) and (2) are specified with respect to the distribution functions in the inlet section, and an assumption is made that heterogeneous condensation nuclei (solid aerosol particles) have the ideal wettability. The assumed polydispersity of heterogeneous condensation results in that the condensation modeling results are overestimated by no more than 10% [9].…”

Section: Aerosol Particles' Nucleationmentioning

confidence: 99%

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The Impact of Cesium Vapor Bulk Condensation on the Transport of Aerosols in the Reactor Plant’s Primary Circuit during a Severe Accident at a Nuclear Power Plant with VVER

2020

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The article presents the results from numerical modeling of aerosol particles' deposition process during their transportation in the horizontal section of the reactor plant's primary circuit model for the conditions typical for a severe accident at an NPP equipped with VVER reactors. The effect that the bulk condensation of cesium vapors has on the growth and deposition of aerosols during their transportation is analyzed. The influence of the initial size and concentration of aerosol particles on their growth rate and subsequent deposition is considered. Homogeneous condensation occurring in the absence of heterogeneous condensation nuclei (solid aerosol particles) and also heterogeneous condensation under the conditions in which nuclei of the new phase do not emerge according to the homogeneous mechanism are considered as the limit cases. Data on the average size of the produced droplets and aerosol particles along the channel axis in the condensation zone with the varied value of aerosol particles mass fraction in the flow have been obtained, which corresponded to different ratios of the condensate mass fraction in the form of droplets and liquid layer on the surface of solid aerosol particles. It has been established that the general deposition rate decreases if the flow contains droplets generated as a result of homogeneous bulk condensation and having a size smaller than the size of grown aerosol particles. The article describes the analysis scheme of the modeled section whose geometrical shape was specified based on the horizontal section of the experimental installation in the FALCON-ISP1 series of experiments on the deposition and transport of radionuclide aerosols. The cesium vapor homogeneous-heterogeneous condensation process is modeled by numerically solvingusing the method of moments-the kinetic equation for the droplet size distribution function with involvement of the authors' COND-KINET-1 computer program. The transport and deposition of aerosol particles in the primary circuit channel were modeled using the MAVR-TA computer code developed at the National Research Center Kurchatov Institute.

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Section: Nuclear Power Plantsmentioning

confidence: 99%

Section: Aerosol Particles' Nucleationmentioning

confidence: 99%