A homogeneous thermal cylindrical reactor core is D=4 ft diameter and H=4 ft high. The extrapolation...

 

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A homogeneous thermal cylindrical reactor core is D=4 ft diameter and H=4 ft high. The extrapolation lengths in all directions are 0.5 ft. Use following values for calculation. N₁-6×1020 atoms/cm³, co-1013 neutrons/cm². sec, Tmod=500°F. (a) Find the volumetric power density (q") in W/m³ unit at a point 0.832 ft radial distance and 1.667 ft above the center of the core. (b) Assume that D₂O coolant at 120 bars is flowing over the core with inlet temperature at 230 °C with velocity of 2 m/sec. The equivalent hydraulic diameter is 1.2 m. What is the bulk temperature at the axial location of H=1.667 ft? What is the heat transfer coefficient at this location? Use following values of μ=1×10-4 Pa-sec, c=4200 J/kg°C, p=800 kg/m³, k=0.6 W/mK. (c) What is the D₂O temperature at channel outlet? Discuss if this temperature is realistic. A homogeneous thermal cylindrical reactor core is D=4 ft diameter and H=4 ft high. The extrapolation lengths in all directions are 0.5 ft. Use following values for calculation. N₁-6×1020 atoms/cm³, co-1013 neutrons/cm². sec, Tmod=500°F. (a) Find the volumetric power density (q") in W/m³ unit at a point 0.832 ft radial distance and 1.667 ft above the center of the core. (b) Assume that D₂O coolant at 120 bars is flowing over the core with inlet temperature at 230 °C with velocity of 2 m/sec. The equivalent hydraulic diameter is 1.2 m. What is the bulk temperature at the axial location of H=1.667 ft? What is the heat transfer coefficient at this location? Use following values of μ=1×10-4 Pa-sec, c=4200 J/kg°C, p=800 kg/m³, k=0.6 W/mK. (c) What is the D₂O temperature at channel outlet? Discuss if this temperature is realistic.

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a q N4 co Tmod q 6 1020 atomscm3 1013 neutronscm2sec 500F q 31 1016 Wm3 b ... View the full answer