Full Analysis for the uranium 238  Yellow powder

U_________ 72.1 

W_________0.148

K________15.68

Ca_________1.74

Ti ___________0.364

Mn_________0.150

Ba________7.75

Sa__________0.337

Uranium-238 is the most stable and makes up over 99% of the naturally occurring uranium. Interesting Facts about Uranium Yellowcake is an intermediate step in refining pure uranium. It is a yellow powder made up of mostly Uranium oxide 238 U can be used as a source material for creating plutonium-239, which can in turn be used as nuclear fuel. Breeder reactors carry out such a process of transmutation to convert the fertile isotope 238 U into fissile 239 PU