Abstract
General formulas for gas-driven permeation, plasma-driven permeation and simultaneous gas- and plasma-driven permeation have been derived by a circuit analogy, in which permeation resistance and permeation potential are newly defined for both diffusion in the bulk and recombination on the surface and the gradient of permeation potential against permeation resistance is considered to be the general driving force for tritium permeation through a laminate. The formula is applied to the assessment of tritium permeation and inventory in ITER divertor.
