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Date: 2013-08-29 07:59 pm (UTC)Spallation reactors might make sense for destroying higher transuranics (curium, etc.), which tend to have so few delayed neutrons when fissioned that you cannot operate a conventional reactor using them (far too much risk of going prompt supercritical -- BOOM). But if you're extracting and concentrating the transuranics for destruction, it's probably easier to just package them up and shoot them into space instead.
Fusors are fun toys, but cannot work as an energy source. Even as neutron sources, they really suck.