Aluminum is currently used in not only research reactor components but also nuclear batteries and spacecraft, and it has been proposed as material for storage containers for nuclear waste. (sciencedaily.com)
In 1961, he returned to industry as Manager of Nuclear R&D for Martin Marietta, where he participated in the development of nuclear batteries for terrestrial and space applications and in the construction and operation of small nuclear power reactors for remote locations (Wyoming and Antarctica). (cooperalumni.org)
Such nuclear batteries could in principle be sealed, placed in the ground, and run for a decade before being swapped out for an entirely new modular reactor. (scientificamerican.com)