Criticality Safety Survey Computations of Uranium Hexafluoride Freezer/Sublimer Tube Lattices

摘要

The ANISN computer code has been used at the Oak Ridge Gaseous Diffusion Plant to survey the nuclear properties of infinite UF sub 6 freezer/sublimer tube lattices immersed in hydrogen fluoride-moderated UF sub 6 over the 1.0 to 5.0% exp 235 U enrichment range. Refrigerant-114 (R-114) at various densities was present with each freezer/sublimer tube. Infinite-medium multiplication factors were also determined for homogeneous UF sub 6 /HF and UF sub 6 /R-114 systems. The survey provides a broad overview of the nuclear properties of UF sub 6 freezer/sublimers and guidance for future computations on specific designs of these units proposed for gaseous diffusion plant application at a maximum exp 235 U enrichment of 5%. (ERA citation 02:057272)