Q9 (10 pts): A uranium enrichment facility produces nuclear reactor fuel enriched to 5% 235U to fuel the reactor. For each tonne of natural uranium, the enrichment facility produces 120 kg of fuel. 1) What is the concentration of 235U in the 900 kg of depleted uranium? 2) Assume that the percentage of 235U in spent nuclear fuel removed from the reactor is the same as in natural uranium. How many tonnes of fuel are used in a year, if 0.9 tonnes of 235U have to be consumed by the reactor?