A fuel salt shipping system includes an outer container defining an outer containment volume and an inner container disposed within the outer containment volume, and defining an inner volume configured to contain a molten fuel salt. The inner container and the outer container may cooperate to define an annulus region therebetween. The fuel salt shipping system may further include a fuel salt conduit penetrating the outer container and the inner container and fluidically coupling the inner volume to an external environment of the system. The fuel salt shipping system may further include a heating system including a heater disposed in the annulus space and configured to impart a heat output to the molten fuel salt of the inner volume and change a phase of the molten fuel salt held therein from a solid phase to a liquid phase.