Page:4SIGHT manual- a computer program for modelling degradation of underground low level waste concrete vaults (IA 4sightmanualcomp5612snyd).pdf/35



As per the linear model for sulfate attack, the sulfate front increases linearly with time. The chloride depth has a t1/2 because of the low Peclet number (the ratio of Darcy to ‘diffusive’ flow [2]). At sufficiently high Peclet number (greater permeability or hydraulic head) the chloride depth approaches a linear relationship to time.

5.4Failure Data

After reporting the time dependent behavior, reports the reason for termination and the status of the sulfate and chloride penetration: