The behaviour of aerosol in the reactor containment following a severe accident is an important determinant of the threat to the environment. The deposition of the aerosol onto surfaces within the containment causes that it is much less likely to be released. Some deposition processes are very sensitive to particle size, so it is important to consider aerosol growth processes, namely coagulation and condensation.
The Brownian and gravitational coagulation, removal due to gravitational settling and condensation of water vapour on aerosol particles are considered. The calculations are performed for different values of the initial mass of particles per unit volume and the log-normal initial distribution.
The method of moments is used to solve the aerosol dynamics equation.