Abstract
An exact analytical solution for transient heat conduction in the ground from buried radioactive nuclear waste has been derived. The heat sources are assumed to be an array of arbitrarily located point sources in an infinite ground. The solution accounts for orthotropic thermal conductivity effects in three dimensions and for the timevarying nature of the heat generation rate of each source due to radioactive decay. Owing to the point source nature of the assumed heat sources, the solution derived is valid only at intermediateand far-field distances from real finite-size sources. Numerical results are presented for several typical waste repository situations in shale, salt, and basalt.
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