QUESTION 4 [20 MARKS] For PWR design with 4000MWth net power and a linear heat generation rate of 17.8kW/m. a). Compute the margin for this PWR when the failure limit is established by centerline melting of the fuel at 70kW/m. Use the following factors: Radial flux factor =1.55 Axial and local flux factor =1.7 Engineering uncertainty factor =1.08 Overpower factor =1.15 [10 Marks] b). Deduce the maximum heat generation rate below which the plant should operate. [10 Marks]