Abstract: Methods and systems for separation of thorium from uranium and their decay products are provided. The method comprises combining a nuclear fuel feedstock comprising thorium and uranium with a first acid to form a first solution. The first solution is contacted an ion exchange resin that is selective for thorium or uranium. The thorium or uranium is at least partially removed from the first solution by binding the thorium or uranium to the ion exchange resin thereby forming a second solution. The second solution is combined with oxalic acid to precipitate uranium or thorium from the second solution to form a precipitate. The precipitate is separated from the second solution.

Abstract: A remote heat removal system that pumps a secondary fluid from a remote reservoir through a secondary side of a heat exchanger in heat exchange relationship with a primary fluid to be cooled. The secondary fluid drives a motive device that drives the primary fluid through the primary side of the heat exchanger.

Abstract: A remote heat removal system that pumps a secondary fluid from a remote reservoir through a secondary side of a heat exchanger in heat exchange relationship with a primary fluid to be cooled. The secondary fluid drives a motive device that drives the primary fluid through the primary side of the heat exchanger.