The behavior of contained aerosols following a hypothetical accident of a liquid-metal fast breeder reactor is analyzed. The effects of turbulent coagulation, thermophoretic deposition, and reduced agglomerate density are included in the analysis. The method of moments is utilized as a solution procedure and is discussed in some detail. Calculated results are compared with previous laboratory measurements. The predictions of the suspended aerosol concentration are found to be somewhat conservative but in general agreement with experimental results.