Standalone Containment Analysis of Four Phébus Tests with the ASTEC and the MELCOR Codes

Table 6

Summary of the investigated parameters and influence for each Phébus test.

Common parameters
Parameter	FPT-0		FPT-1		FPT-2		FPT-3
	AS	ME	AS	ME	AS	ME	AS	ME
Number of Particle Size Classes	No	No	Yes	No	No	No	No	No
Dynamic Shape Factor for Agglomeration Processes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Aerosol density	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Agglomeration shape factor	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Turbulence dissipation rates	No	Yes	No	No	No	Yes	No	No
Particle sticking probability	Yes	Yes	No	Yes	No	Yes	No	Yes
Ratio of the thermal conductivity of the gas phase to the	No	No	Yes	No	No	No	No	No
thermal conductivity of the aerosol particles
Aerodynamic Mass Median Diameter	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes
Geometric Standard Deviation	No	No	Yes	No	No	No	No	No
ASTEC-specific parameters
Influence of the aerosol particles on the gas density	No	/	No	/	No	/	No	/
Flag to dynamically calculate the condensation time step	No	/	No	/	No	/	No	/
Air molecular weight	No	/	No	/	No	/	No	/
Relation employed to calculate the collision efficiency for	Yes	/	No	/	No	/	No	/
gravitational and turbulent coagulation
Water film thickness used for drainage and aerosol wash-down	No	/	No	/	No	/	No	/
Aerosol deposition velocity for each aerosol component	No	/	No	/	No	/	No	/
MELCOR-specific parameters
Condensation of water on all the aerosol particles or only	/	No	/	No	/	No	/	No
on aerosol particles containing water
Particle slip coefficient influencing the gravitational	/	No	/	No	/	No	/	No
deposition
Constant associated with the thermal accommodation	/	No	/	No	/	No	/	No
coefficient for the thermophoresis deposition
mechanism
Diffusion boundary layer thickness	/	No	/	No	/	No	/	No
Partition of I- between atmosphere and sump	/	Yes	/	Yes	/	/	/	No
Partition of HIO between atmosphere and sump	/	Yes	/	Yes	/	No	/	No