scholarly journals Comparison of the data from an epithermal neutron log to water content measured from in situ samples in Yucca Flat, Nevada Test Site

1974 ◽  
Author(s):  
J. R. Hearst
Keyword(s):  
Water Content ◽  
Epithermal Neutron ◽  
Test Site ◽  
Nevada Test Site

Site Characterization for Field Radionuclide Migration Studies in Climax Granite

1981 ◽  
Vol 6 ◽  
Author(s):  
Dana Isherwood ◽  
Ellen Raber ◽  
Randolph Stone
Keyword(s):  
Flow Model ◽  
Test Site ◽  
Hydraulic Testing ◽  
Nevada Test Site ◽  
Radionuclide Migration ◽  
Critical Question ◽  
Initial Field ◽  
In Situ Conditions ◽  
Fracture Apertures

ABSTRACTRadionuclide migration experiments in fractured granite at the Climax Stock, Nevada Test Site, are needed to compare field and laboratory measured retardation factors to determine whether laboratory studies accurately reflect in situ conditions. Initial field activities have concentrated on hydrological investigations to determine whether the fractures in Climax granite are suitable for migration experiments. A critical question was whether we could isolate a single vertical fracture between two boreholes and establish flow along that fracture from an upper to a lower borehole. Of the ten fractures tested, one fracture would not take water at pressures up to 200 psig for 24 hours. Several fractures were so permeable they accepted water at a rate which exceeded the pumping capacity of the equipment. Other fractures failed to show a connection between the two boreholes. In two fractures, we were able to establish a circulating system with up to 95 percent of the injected water being recovered. Constant pressure injection tests were conducted. Intrinsic permeabilities of 33 and 75 (μm)2 were estimated using a radial nonsteady flow model. These values correspond to effective fracture apertures of 20 and 30 μm respectively. Concurrent with the hydraulic testing activities is a study of the Climax ground-water chemistry. Our analyses show the natural water to be very different in composition from the granite equilibrated water used in laboratory sorption studies. This paper includes the results of the hydrogeological and geochemical investigations, and describes the overall experimental design plans for the radionuclide migration experiments.

scholarly journals In situ geomechanics: Climax granite, Nevada Test Site

10.2172/59219 ◽  
1981 ◽  
Author(s):  
F.E. Heuze ◽  
W.C. Patrick ◽  
R.V. De la Cruz ◽  
C.F. Voss
Keyword(s):  
Test Site ◽  
Nevada Test Site

ELECTRICAL RESISTIVITY OF ROCKS IN THE AREA 12 TUNNELS, NEVADA TEST SITE, NYE COUNTY, NEVADA

Geophysics ◽  
1962 ◽  
Vol 27 (2) ◽  
pp. 242-252 ◽  
Author(s):  
George V. Keller
Keyword(s):  
Electrical Resistivity ◽  
Water Content ◽  
Phase Ii ◽  
Test Site ◽  
Atomic Energy ◽  
Test Series ◽  
Nevada Test Site ◽  
Resistivity Measurements ◽  
Drill Holes ◽  
Semiquantitative Method

Electrical resistivity measurements provide a semiquantitative method for estimating the water content of a rock. Techniques for measuring resistivity along tunnel walls and in horizontal drill holes were used in the Area 12 tunnel complex at the Nevada Test Site prior to the Atomic Energy Commission’s Hardtack Phase II test series during the fall of 1958. The results indicate that in future underground tests where the amount of water in the rock must be determined, resistivity measurements can be used to estimate water content, with only a limited number of samples needed to check the results.

Secondary ion mass spectrometry measurements of volcanic tuffs containing radionuclides from underground nuclear tests

2000 ◽  
Vol 88 (8) ◽  
Author(s):  
T.P. Rose ◽  
D.K. Smith ◽  
D.L. Phinney
Keyword(s):  
Mass Spectrometry ◽  
Secondary Ion Mass Spectrometry ◽  
Test Site ◽  
Nevada Test Site ◽  
Anthropogenic Radionuclides ◽  
Close Proximity ◽  
Ion Mass Spectrometry ◽  
Nuclear Tests ◽  
Secondary Ion

The in situ distribution of anthropogenic radionuclides in volcanic tuffs was measured using secondary ion mass spectrometry (SIMS). Samples were obtained from boreholes drilled in close proximity to expended underground nuclear test cavities at the Nevada Test Site, USA. SIMS measurements revealed the presence of

A Comparison of in Situ Gamma Soil Analysis and Soil Sampling Data for Mapping 241Am and 239Pu Soil Concentrations at the Nevada Test Site

1977 ◽  
Vol 24 (1) ◽  
pp. 587-590 ◽  
Author(s):  
John A. Kirby ◽  
Lynn R. Anspaugh ◽  
Paul L. Phelps ◽  
George W. Huckabay ◽  
Frank Markwell ◽  
...  
Keyword(s):  
Soil Analysis ◽  
Test Site ◽  
Soil Sampling ◽  
Nevada Test Site
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