Click any button for sharing!
The previous episodes covered the science behind how nuclear reactions and weapons work, but the real barrier to building a device is the creation of the fissile material. Uranium in its natural form cannot sustain a fast chain reaction, it needs to be enriched to eliminate the non fissile isotopes, and developing this process was one of the largest projects in the Manhattan Project.
This is largely a broad overview, much of the details are classified.
This is Cody’s video on Uranium refining for those interested in the Chemistry: