Then the clay of the bentonite barrier initially will be unsaturated. Therefore, as a result of this heat, there is a hydration from the rock, that is the water comes in from the rock, so here you have water, although it gives a limited supply of water, but then water will flow in the bentonite barrier. And the heat is flowing in this direction. And heat-fluxes mainly due to the conduction and advection. And then we have liquid flux going towards canister, and then because of the heat there is water evaporation, and then there is a heat flux in the gas-phase, and the vapour flux is basically the transport of moisture rather than transport of heat. But in the diffusion of vapour, and there is a condensation of water because it goes into a cooler area from a hotter area, then we have liquid, and then we have solids.
So, it is quite a complex coupled analysis and on the other side of the host rock you have again the liquid flux and the heat flux.
The whole objective is: can we predict temperatures, and can we predict the moisture levels within this rock and see whether the flow of radionuclear is, whether they are okay or above limits, of they are below limit.
