What is the most technically challenging part of using uranium to generate electricity?

A) mining and milling the radioactive material, because of environmental regulations
B) separating the uranium from the rock in which it occurs
C) using gas centrifuges to preferentially enrich the more energetic uranium isotope ²³⁵U)
D) finding a material to moderate the reaction within the reactor

Gas Centrifuges

Devices used in the uranium enrichment process that rapidly spin gas to separate isotopes, particularly to increase the percentage of uranium-235 for use in nuclear reactors or weapons.

Uranium Isotope

Variants of the element uranium that contain the same number of protons but different numbers of neutrons in their nuclei, with different isotopes having different nuclear properties.

Radioactive Material

Substances that emit radiation as a result of the spontaneous disintegration of atomic nuclei.