干旱区生态环境知识资源中心(Arid): The application of borehole logging to characterize the hydrogeology of the Faultless site, Central Nevada Test Area

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DOI	10.2172/10106453
报告编号	DOE/NV/10845--35
来源ID	OSTI_ID: 10106453
	The application of borehole logging to characterize the hydrogeology of the Faultless site, Central Nevada Test Area
	Chapman, J.B.; Mihevc, T.M.; Lyles, B.F.
英文摘要	The Central Nevada Test Area was the site of the Faultless underground nuclear test that could be a source of radionuclide contamination to aquifers in Hot Creek Valley, Nevada. Field studies in 1992 and 1993 have used hydrologic logging and water sampling to determine the adequacy of the current groundwater monitoring network and the status of water-level recovery to pre-shot levels in the nuclear chimney. The field studies have determined that there is a possibility for contaminant migration away from the Faultless event though the pre-event water level has not been attained, while new data raise questions about the ability of the current monitoring network to detect migration. Hydrologic logs from the postshot hole (drilled into the chimney created by the nuclear detonation) reveal inflow around 485 m below land surface. The physical and chemical characteristics of the inflow water indicate that its source is much deeper in the chimney, perhaps driven upward in a convection cell generated by heat near the nuclear cavity. Logging and sampling at monitoring wells HTH-1 and HTH-2 revealed that the completion of HTH-1 may be responsible for its elevated water level (as compared to pre-nuclear test levels) and may have also created a local mound in the water table in the alluvium that accounts for higher post-test water levels at HTH-2. This mound would serve to divert flow around the monitoring wells, so that only migration of contaminants through the underlying, higher pressure, volcanic units is currently monitored. A hydraulic high found in an abandoned hole located between the nuclear chimney and the monitoring wells further reduces the likelihood of HTH-1 or HTH-2 intercepting contaminant migration.
出版年	1994
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	54 ENVIRONMENTAL SCIENCES ; 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE ; NEVADA TEST SITE ; RADIONUCLIDE MIGRATION ; HYDROLOGY ; SAMPLERS ; ACCURACY ; AQUIFERS ; NUCLEAR EXPLOSIONS ; UNDERGROUND EXPLOSIONS ; ENVIRONMENTAL EFFECTS ; WELL LOGGING EQUIPMENT ; WATER TABLES ; LIQUID FLOW ; GROUND WATER ; WATER POLLUTION MONITORS ; WATER WELLS ; CHEMICAL LOGGING ; TEMPERATURE LOGGING ; EXPERIMENTAL DATA 540230 ; 450200 ; RADIOACTIVE MATERIALS MONITORING AND TRANSPORT ; NUCLEAR EXPLOSIONS AND EXPLOSIVES
URL	http://www.osti.gov/scitech/servlets/purl/10106453
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/265731
推荐引用方式 GB/T 7714	Chapman, J.B.,Mihevc, T.M.,Lyles, B.F.. The application of borehole logging to characterize the hydrogeology of the Faultless site, Central Nevada Test Area,1994.