Question: 1 kg of uranium produces how much energy in joules?
Answer: Nuclear Reactors II In the previous question, we determined that 1 kg of pure uranium- 235 will produce about 7·1013 J of energy. However, enriched uranium fuel used in nuclear reactors only contains about 5% of uranium-235. What is the energy density of uranium fuel? Note that 1 GJ is equivalent to 109 J.