Question: Fuel utilization is defined as amount of initial fissile material required per unit energy (g/MWd). For example, CANDU uses natural uranium with (0.71 %) U-235
Fuel utilization is defined as amount of initial fissile material required per unit energy (g/MWd). For example, CANDU uses natural uranium with \(0.71 \%\) U-235 and generates 7.0 GWd/t. It implies that CANDU uses \(7100 \mathrm{~g} / \mathrm{t}\) for energy of \(7000 \mathrm{MWd} / \mathrm{t}\), so the fissile requirement works out as \(7100 / 7000=1.01 \mathrm{~g} / \mathrm{MWd}\), Calculate the similar requirement for BWR and PWR where the discharge burnups are \(20 \mathrm{GWd} / \mathrm{t}\) and \(33 \mathrm{GWd} / \mathrm{t}\) and the initial average enrichments are \(2.1 \%\) and \(3.0 \%\) respectively.
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