A nuclear reactor provides $3,600$ MW of thermal power. The reactor operates

with $4\%$ enriched uranium. Assuming that only the U$-235$ isotope participates in

fission in the reactor, determine

$($a$)$ the daily consumption of fuel in the reactor; $($Solution: $111\mathrm{.}40$ kg$)$

$($b$)$ the burn$-$up rate, defined as the ratio of energy produced in MWh per ton of

fuel consumed.