Calculate the ratio of volume of moderator to the volume of fuel for typical PHWR and PWR
Question:
Calculate the ratio of volume of moderator to the volume of fuel for typical PHWR and PWR lattices using the data given below. Assume that height of the fuel is \(1 \mathrm{~mm}\). It may be noted that the PHWR fuel assembly is housed in a pressure tube. Also calculate the moderator to fuel volume ratio for a single pin.
Transcribed Image Text:
PWR PHWR Arrangement Square Cylindrical Fuel pin diameter (mm) 8.2 14.45 Fuel pellet diameter (mm) 9.6 15.21 Clad thickness (mm) 0.6 0.38 Pressure tube dimensions inner/outer diameter (mm) 91.0/103 No. of pins per assembly 289 19 Lattice pitch (mm) 218 228.6
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