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A Pressurized Water Reactor fuel rod is 1 2 f t long and 0 . 3 7 4 inches in diameter ( outer ) on

A Pressurized Water Reactor fuel rod is 12ft long and 0.374 inches in diameter (outer) on a 0.496 inch square pitch. The fuel pellet diameter is 0.3225 inches. The fuel rod gap is constant with a width of 0.0065 inches. The system pressure is 2250 psia and can be assumed to be constant. The coolant at the inlet is at 557F with an injection mass flow rate of 2475lbmhr. The average linear heat rate is 8.5kWft. The peak to average power ratio is given as 1.37 for a sine power shape. Assume no extrapolation distance, a constant gap heat transfer coefficient of 1000BTUhrr-ft2-F, and a constant convective heat transfer coefficient of 7000BTUhr-ft2-F. Also assume constant fluid properties given as:
=46.39lbmft3,cp=1.261BTUlbm-F,k=0.334BTUhr-ft-F,=0.222lbmft-hr
The fuel thermal conductivity is constant at 1.2BTUhr-ft-F and the cladding thermal conductivity is 10.5 BTU/hr-ft-F.
Calculate and plot the axial distributions for the coolant, outer cladding, inner cladding, pellet surface, and pellet centerline temperatures.(5 points)
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