4 (a) Why in graphite or heavy water moderated reactors it is possible to use natural...
4 (a) Why in graphite or heavy water moderated reactors it is possible to use natural uranium as the fuel, but in light water moderated reactors enriched fuel must be used? [4 marks] (b) What's the meaning and significance of 160(n, p)1N? [4 marks] (c) Compare a Gen IV fast reactor with a Gen II thermal reactor, what are the main differences, advantages and disadvantages? Keep your answer brief, in the form of bullet points or table. [12 marks]