A thousand reactor factor consume half of its fuel in 5.00 y . How much $_{92} U^{235}$ did it contain initially ? Assume that the reactor operates $80\%$ of the time and that all the energy generated arises from the fission of $_{92}U^{235}$ and that this nuclide is consumed by the fission process ?

Question

$\begin{array}{1 1} 308.8\;kg \\ 3088\;kg \\ 154.4\;kg \\ 1544\;kg \end{array}$