A model has been developed, describing the steady state transport of dissolving species of radionuclides from a single canister in a repository for spent nuclear fuel out into the passing water in fractures in the surrounding rock matrix. The transport of nuclides is described by a network of transport resistances, coupled together in the same way as an electrical circuit network. With the model a number of calculations are done for various sets of fracture geometry data. The calculations indicate that the resistance network model gives results comparable to those of a complex 3-dimensional numerical model. (au).