Location: US - United States
Data for material and energy requirements for construction and decommissioning are from an old study, which does not differenciate between dry and wet process. The material inventory may not correspond to currently operating facilities, which is taken into account in the uncertainties. The land use is based on actual data for the Sequoyah facility. The lifetime is assumed to be 40 years with a throughput of 5000 t/a. Although Sequoyah was operating only for 22 years, 40 years can be assumed as an average for currently operating plants.
[The full documentation of this dataset was originally provided in the corresponding ecoinvent report from the Swiss Centre for Life Cycle Inventories, which is accessible for free to guests and users of ecoinvent version 2 (https://www.ecoinvent.org/login-databases.html). The dataset may subsequently have been subjected to central changes to the database, as described in the respective change report for each new release.]
Undefined unit processes (UPRs) are the unlinked, multi-product activity datasets that form the basis for all of the system models available in the ecoinvent database. This is the way the datasets are obtained and entered into the database by the data providers. These activity datasets are useful for investigating the environmental impacts of a specific activity (gate-to-gate), without regard to its upstream or downstream impacts.