5-4. A UO₂-fuel manufacturer made fuel pellets 0.05 in. in diameter and 0.60 in. long placed end to end in a 0.032-in.-t

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5 4 A Uo Fuel Manufacturer Made Fuel Pellets 0 05 In In Diameter And 0 60 In Long Placed End To End In A 0 032 In T 1 (763.95 KiB) Viewed 41 times

5-4. A UO₂-fuel manufacturer made fuel pellets 0.05 in. in diameter and 0.60 in. long placed end to end in a 0.032-in.-thick Zircaloy 2 can, 0.57 in. OD. The gap between fuel and cladding was filled with helium gas during the can welding process. The fuel was 1.5 percent enriched. The pellets were to be used in a 50-Mw(t) boiling-water reactor where the average core heat flux is 74,444 Btu/hr ft² of can OD. Four percent of the thermal output of the core is produced in the moderator. Because of manufacturing considerations, the manufacturer decided to reduce all diameters by 0.12 in. (cladding thickness remains constant). What should be the new average core heat flux (based on