The key raw material for the project was uranium, which was used as fuel for the reactors, as feed that was transformed into plutonium, and, in its enriched form, in the atomic bomb itself.
Det vigtigste råmateriale for projektet var uran, som blev anvendt som brændstof i reaktorerne, som materiale, der blev omdannet til plutonium, og, i dens berigede form, i selve atombomben.