In a normal water-cooled reactor Uranium is split, generating highly active short-lived waste and energy. But also heavier elements are generated, which are less active, but remain radiotoxic for a long time. Especially these heavier elements require very long term safe storage, to avoid being released into the environment. However, there is still a lot of energy stored in these materials, and in the Thorizon system we also split these heavy elements, and turn it into short-lived waste and energy, without generating new long-lived waste.