Deep borehole disposal is the concept of disposing of high-level radioactive waste from nuclear reactors in extremely deep boreholes (Deep geological repository). Deep borehole disposal seeks to place the waste as much as five kilometers beneath the surface of the Earth and relies primarily on the thickness of the natural geological barrier to safely isolate the waste from the biosphere for a very long period of time so that it should not pose a threat to man and the environment. In the diagram the solution domain is used for the purpose of computer modelling of heat flow around the borehole.
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