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A Pressurized Water Reactor 1 5 1 5 reload fuel assembly has 2 0 4 fuel rods with 0 . 4 2 2 inch diameters

A Pressurized Water Reactor 1515 reload fuel assembly has 204 fuel rods with 0.422 inch diameters on a 0.563 inch square pitch. There are 21 guide tube thimbles in the assembly with a diameter of 0.533 inches. The fuel assembly has a pitch of 8.466 inches. For a system pressure of 2250 psia, a bulk fluid temperature of 580F, and an assembly mass flux of 2.5106lbmhr-ft2 in the rodded region of the bundle. The fluid properties are given as:
=44.81lbmft3,cp=1.322BTUlbm-F,k=0.3188BTUhr-ft-F,=0.2188lbmft-hr
determine the single phase pressure drop from the inlet nozzle to the top of the fuel assembly. The fuel rod length is 12 feet. The top and bottom nozzles are each 6 inches high for an overall assembly length of 13 feet. There are 8 spacer grids equally spaced along the rod bundle. The top and bottom grids are egg crate style grids which have a blockage ratio of 24% of the bundle flow area. The remaining 6 grids are mixing vane grids which a grid blockage ratio of 23% of the bundle flow area and a mixing vane blockage of 30% of the bundle flow area. The inlet fuel nozzle has a loss coefficient of 2.5, and the exit nozzle has a loss coefficient of 2.0. Both of the nozzle loss coefficients account for the contraction/expansion of the flow from the plenum regions into the rodded regions. The flow area through the nozzles is 60% of the open area characterized by the assembly pitch(For determining the rod friction factor, use the correlations given in the notes for a smooth tube McAdams/Blausis and for both spacer grids, cv=6.5 and use Yao et al. model)(5 points)
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