Arid
Report Number1462008
Unreviewed Disposal Question Evaluation: Impact of Delayed Revegetation of Closure Covers at the Area 5 Radioactive Waste Management Site, Nevada National Security Site, Nye County, Nevada
Shott, Gregory J.; Reed, Dawn N.
Abstract in EnglishThis Unreviewed Disposal Question Evaluation (UDQE) assesses the impacts of delayed revegetation of the 92-acre (ac) Low-Level Waste Management Unit (LLWMU) closure covers in the Area 5 Radioactive Waste Management Site (RWMS) on the Nevada National Security Site (NNSS). The Area 5 RWMS Performance Assessment (PA) assumes closure with fully functional evapotranspiration (ET) covers. A key safety function of ET covers is to prevent percolation of water through waste by absorbing and storing precipitation in near-surface soil until it is returned to the atmosphere by ET. The closure cover’s ET function relies heavily on native desert vegetation to transpire moisture from dry soils. Final ET closure covers were installed on the 92-ac LLWMU in 2012. Since then attempts to reestablish native vegetation on the closure covers have failed. As of 2018, perennial native vegetation is mostly absent on the covers, but a dense population of invasive weeds (e.g., Salsola paulsenii and Halogeton glomeratus) is present. This UDQE assesses the effect of delayed restoration of native desert vegetation on the hydrologic performance of the Area 5 RWMS ET covers.
Year Published2018-07-30
CountryUnited States
Subject of Source12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES ; Nevada National Security Site ; NNSS ; Performance Assessment ; evapotranspiration ; precipitation ; percolation ; Low-Level Waste Management ; vegetation ; hydrology
URLhttp://r.cnki.net/KCMS/detail/detail.aspx?DbCode=KJBG&dbname=KJBGW&filename=5c1c6bb4413c33143c7b144b
Document Type科技报告
Identifierhttp://119.78.100.177/qdio/handle/2XILL650/274085
Recommended Citation
GB/T 7714
Shott, Gregory J.,Reed, Dawn N.. Unreviewed Disposal Question Evaluation: Impact of Delayed Revegetation of Closure Covers at the Area 5 Radioactive Waste Management Site, Nevada National Security Site, Nye County, Nevada,2018.
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