Abstract
In order to study aerosol behavior in a cover gas region of LMFRs (Liquid Metal Fast Reactors) , a numerical method was developed by considering the aerosol radius as one of the space coordinates. In our previous model, heterogeneous nucleation was assumed for the aerosol generation. However, homogeneous nucleation might be included since sodium cluster are considered to be produced in the cover gas region, which subsequently form aerosol particles. Therefore we developed a new calculation model by taking into account the homogeneous nucleation. The same governing equations for mixed gas and the calculation schemes as the previous study were employed in the model. As a result, although the new model gave the same distributions of temperature and mass fraction of the sodium vapor as those by the previous model and the experimental data, the previous model without homogeneous nucleation was found to give better prediction for the aerosol mass concentration in the cover gas region. From these results, it can be said that there would be almost no possibility of aerosol production via the sodium cluster and therefore heterogeneous nucleation model is sufficient for the prediction of aerosol behavior.
