Engineering analysis for disposal of depleted uranium tetrafluoride (UF4)

摘要

This report presents and evaluates options for disposing of depleted uranium inthe chemical form of uranium tetrafluoride (UF(sub 4)). Two depleted uranium inventories are considered. One results from the original U.S. Department of Energy (DOE) inventory of 560,000 metric tons (te) of depleted uranium hexafluoride (UF(sub 6)); the other inventory is the original DOE inventory augmented by 145,000 te of depleted UF(sub 6) from the United States Enrichment Corporation. Preconceptual designs are included for three disposal options: disposal in a vault, disposal in an engineered trench, and disposal in a deep mine cavity. The disposal container is taken to be either a 30-gallon drum or a 55-gallon drum. Descriptions of the facilities associated with the three disposal options are provided. Staffing estimates for the construction and operation of the facilities are also provided. Wastes and emissions from the facilities during construction, operation, and maintenance have been estimated. Parametric studies have also been performed on the basis of 25% and 50% of the original inventory.