The Near-Depleted Uranium Cell is rarely produced when a Uranium Cell decays in the Nuclear Reactor. It can be enriched to produce a Re-Enriched Uranium Cell. Another way to obtain the Near-Depleted Uranium Cell is to evenly distribute Refined Uranium between 8 Empty Cells. This way, it's possible to increase the energy yield of a single Refined Uranium ingot up to 8-fold. The cell will produce one point of heat each reactor tick but will not interact with any of the adjacent components.
Depleted Isotope Cell Shapeless Recipe