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Title: Research Needs for Deep Boreholes.


Abstract not provided.

; ; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE), Fuel Cycle Technologies (NE-5)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Proposed for presentation at the IHLRWM held April 12-16, 2014 in Charleston, SC.
Country of Publication:
United States

Citation Formats

Brady, Patrick Vane., Arnold, Bill Walter, Mackinnon, Robert James, Hardin, Ernest, Sassani, David Carl, Kuhlman, Kristopher L, and Freeze, Geoffrey A. Research Needs for Deep Boreholes.. United States: N. p., 2015. Web.
Brady, Patrick Vane., Arnold, Bill Walter, Mackinnon, Robert James, Hardin, Ernest, Sassani, David Carl, Kuhlman, Kristopher L, & Freeze, Geoffrey A. Research Needs for Deep Boreholes.. United States.
Brady, Patrick Vane., Arnold, Bill Walter, Mackinnon, Robert James, Hardin, Ernest, Sassani, David Carl, Kuhlman, Kristopher L, and Freeze, Geoffrey A. 2015. "Research Needs for Deep Boreholes.". United States. doi:.
title = {Research Needs for Deep Boreholes.},
author = {Brady, Patrick Vane. and Arnold, Bill Walter and Mackinnon, Robert James and Hardin, Ernest and Sassani, David Carl and Kuhlman, Kristopher L and Freeze, Geoffrey A.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2015,
month = 1

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  • The problem of the radiation of a current loop antenna in a multicylindrical layer medium is formulated exactly in terms of an integral and an iterative scheme making the integral more tenable to approximation. This closely approximates the response of the Deep Propagation Tool in invaded boreholes. To enhance the understanding of the wave due to the current loop antenna, the integral is approximated in the limit in which the antenna spacing is much greater than the diameter of invasion, or the frequency is low. The approximation shows that the wave, for the case of shallow invasion, resembles the responsemore » of a loop antenna in an unbounded medium. An iterative scheme is devised to systematically compute the approximation for an arbitrary number of cylindrical layers. The approximation to the response allows one to understand easily the present operating principle of the Deep Propagation Tool and provides better physical insight into the problem.« less
  • Short communication.
  • Argon-40//sup 39/Ar age spectrums have been obtained by incremental heating experiments for eight whole-rock samples of Columbia River basalt from deep boreholes in south-central Washington. The samples analyzed bracket major stratigraphic horizons within the Grande Ronde Basalt portion of the Columbia River Basalt Group, including the Vantage horizon, the Mg horizon, and the N/sub 2/-R/sub 2/ paleomagnetic horizon. Diffusive loss of radiogenic argon has occurred in most samples, but reliable crystallization ages are apparently preserved in the higher temperature gas increments. Best estimates of crystallization ages for six Grande Ronde Basalt samples from core well DC-12 range from 15.6 tomore » 16.1 million years old (+-0.2 million years old, 1/sup sigma/). Stratigraphic considerations suggest that the age difference between the N/sub 2/-R/sub 2/ paleomagnetic horizon and the Vantage horizon (top of Grande Ronde Basalt) is within the resolution of the technique. We, therefore, conclude that this sequence of approx. 15 Grande Ronde Basalt flows was deposited in <500,000 yr. The age of the Vantage horizon is estimated to be 15.6 +- 0.2 million years of approx. 1 million years greater than estimates based on conventional potassium-argon techniques.« less
  • A gas sampling system, designed to withdraw nearly vapor-saturated gases (93 to 100% relative humidity) from deep, unsaturated zone boreholes, was developed by the U.S. Geological Survey for use in the unsaturated zone borehole instrumentation and monitoring program at Yucca Mountain, Nye County, Nevada. This gas sampling system will be used to: (1) sample formation rock gases in support of the unsaturated zone hydrochemical characterization program; and (2) verify downhole, thermocouple psychrometer measurements of water potential in support of the unsaturated zone borehole instrumentation and monitoring program. Using this sampling system, nearly vapor-saturated formation rock-gases can be withdrawn from deepmore » boreholes without condensing water vapor in the sampling tubes, and fractionating heavy isotopes of oxygen, hydrogen, and carbon. The sampling system described in this paper uses a dry carrier-gas (nitrogen) to lower the dew point temperature of the formation rock-gas at its source. Mixing of the dry carrier gas with the source gas takes place inside a specially designed downhole instrument station apparatus (DISA). Nitrogen inflow is regulated in a manner that lowers the dew point temperature of the source gas to a temperature that is colder than the coldest temperature that the mixed gas will experience in moving from warmer, deeper depths, to colder, shallower depths near the land surface. A test of this gas sampling system was conducted in December, 1992, in a 12.2 meter deep borehole that was instrumented in October, 1991. The water potential calculated using this system reproduced in-situ measurements of water potential to within five percent of the average value, as recorded by two thermocouple psychrometers that had been in operation for over 12 months.« less
  • As a result of recent changes throughout the world, a substantial inventory of excess separated plutonium is expected to result from dismantlement of US nuclear weapons. The safe and secure management and eventual disposition of this plutonium, and of a similar inventory in Russia, is a high priority. A variety of options (both interim and permanent) are under consideration to manage this material. The permanent solutions can be categorized into two broad groups: direct disposal and utilization. Plutonium utilization options have in common the generation of high-level radioactive waste which will be disposed of in a mined geologic disposal systemmore » to be developed for spent reactor fuel and defense high level waste. Other final disposition forms, such as plutonium metal, plutonium oxide and plutonium immobilized without high-level radiation sources may be better suited to placement in a custom facility. This paper discusses a leading candidate for such a facility; deep (several kilometer) borehole disposition. The deep borehole disposition concept involves placing excess plutonium deep into old stable rock formations with little free water present. The safety argument centers around ancient groundwater indicating lack of migration, and thus no expected communication with the accessible environment until the plutonium has decayed.« less