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Geologic components of site characterization and performance assessment for a radioactive waste management facility at the Nevada Test Site

Snyder, K.E. ; Gustafson, D.L. ; Miller, J.J.

United States 1994

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  • Título:
    Geologic components of site characterization and performance assessment for a radioactive waste management facility at the Nevada Test Site
  • Autor: Snyder, K.E. ; Gustafson, D.L. ; Miller, J.J.
  • Assuntos: 05 NUCLEAR FUELS ; GEOLOGY ; GEOPHYSICAL SURVEYS ; GEOSCIENCES ; HYDROLOGY ; LOW-LEVEL RADIOACTIVE WASTES ; MIOCENE EPOCH ; NEVADA TEST SITE ; QUATERNARY PERIOD ; RADIOACTIVE WASTE DISPOSAL ; RADIOACTIVE WASTE FACILITIES ; VOLCANISM
  • Notas: CONF-940225-Vol.2
  • Descrição: The Radioactive Waste Management Site (RWMS), located along the eastern boundary of the Nevada Test Site, has been proposed as a location for a long-term, low-level radioactive waste management facility. The geologic setting of the RWMS requires a program with three major components: tectonism, volcanism, and surficial geology. Rather than treating these as independent activities, these components have been organized to construct a model of the late-Cenozoic landscape evolution of northern Frenchman Flat. To help identify faults that could impact the proposed facility, lineaments in the northern Frenchman Flat area were mapped using remotely-sensed data. To date, the only lineament confirmed by field evidence to be fault-related and associated with surficial deposits is 3.5 km northwest of the RWMS in the longitudinal valley of the Massachusetts Mountains; the faulting is late-Tertiary to Quaternary. No evidence of faulting was found during mapping of alluvium in pit walls at the RWMS proper. The hazard of volcanism at the RWMS within the 10,000-year regulatory period is considered very low due to the lack of evidence for post-Miocene volcanism in the vicinity of Frenchman Flat. Middle Miocene to Quaternary alluvium overlies the faulted middle Miocene rocks in northern Frenchman Flat meaning that a proto-Frenchman Flat basin had formed by middle Miocene time. Drillhole investigations and pit wall mapping at the RWMS obtained detailed near-surface information about the Quaternary alluvium. Soils characterized by structural development and the accumulation of calcium carbonate are present throughout the exposures at the RWMS. Large-scale (1:6,000) surficial geology maps are being made of northern Frenchman Flat. These will provide both fundamental data and the platform needed to reconstruct the Quaternary history of the area. At present, seven geomorphic surfaces are recognized, spanning from early Quaternary to historic site.
  • Editor: United States
  • Data de criação/publicação: 1994
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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