Uranium in Yellowcake calculations.
let p = the proportion of Uranium in Yellowcake (U3O8) by mass.
So 1500 tonnes of Yellowcake contains 1272 tonnes (= 1500 X 84.8%) of Uranium.
The atomic weight of Uranium is based upon an average of the three naturally occurring isotopes:
|
atomic weight of U = |
atomic weight of 238U x abundance of 238U + atomic weight of 235U x abundance of 235U + atomic weight of 234U x abundance of 234U |
|
= |
238.05078 x 0.992745 + 235.04392 x 0.007200 + 234.04095 x 0.000055 |
|
= |
238.02891 |
The abundances are for "typical" yellowcake and vary from place to place.