Page:4SIGHT manual- a computer program for modelling degradation of underground low level waste concrete vaults (IA 4sightmanualcomp5612snyd).pdf/21

 are for sodium chloride, NaCl, calcium hydroxide, Ca(OH)2, and sodium sulfate, Na2SO4, respectively.

Below is a list of all possible input parameters. At the end of each description is an example of usage. In cases where a default value exists, the default value is used as the example value. Whether or not the value is a default value is noted next to the example.

4.1Material Properties

expr m2 / sec

expr:The ultimate Cl diffusivity of the concrete. This value represents the diffusivity of the undamaged concrete. The default value given below is suitable for a w/c=0.45 ordinary portland concrete.

default:

expr m2

expr:The ultimate permeability of the concrete. This value represents the permeability of the undamaged concrete.

default:

expr

expr:Concrete water:cement weight ratio during mixing.

default:

4.2Ion/Fluid Initial Conditions

ion =expr mol/L

ion:The ion of interest.

expr:The external concentration of ion above the roof. This command can be repeated for each ion external to the roof slab.

example:

ion = expr mol/L