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Microbial Characterization for the Source-Term Waste Test Program (Sttp) at Los Alamos

Description: The effects of microbial activity on the performance of the proposed underground nuclear waste repository, the Waste Isolation Pilot Plant (WIPP) at Carlsbad, New Mexico are being studied at Los Alamos National Laboratory (LANL) as part of an ex situ large-scale experiment. Actual actinide-containing waste is being used to predict the effect of potential brine inundation in the repository in the distant future. The study conditions are meant to simulate what might exist should the underground r… more
Date: April 1, 1999
Creator: Leonard, P. A.; Strietelmeier, B. A.; Pansoy-Hjelvik, M. E. & Villarreal, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Pu and Gd Chemistry of Zirconolite Polytypes in a Titanate Ceramic

Description: Titanate-based ceramics are being developed as possible candidates for immobilizing excess plutonium from dismantled nuclear weapons. Evidence from testing of similar ceramics and natural analogues suggests that this material is very resistant to aqueous corrosion. The purpose of this work is to describe the phase(s) present in these ceramics. In particular the authors are interested in the disposition of important elements such as Pu and Gd (to be incorporated into the wasteform as a neutron a… more
Date: October 1, 1997
Creator: Bakel, A. J.; Buck, E. C. & Ebbinghaus, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Incorporation of Technetium Into a Representative Low-Activity Waste Glass

Description: A glass that has been tested to understand the corrosion behavior of waste glasses with high soda contents for immobilizing Hanford incidental wastes has been made by melting crushed glass with either TcO{sub 2} or NaTcO{sub 4} at 1,100--1,300 C. Incorporation of technetium in the glass was affected by solubility or kinetic effects. Metallic technetium inclusions formed in all the TcO{sub 2}-doped glasses. Inclusions also formed in glasses with added NaTcO{sub 4} that were melted at 1,100 C, bu… more
Date: August 1, 1997
Creator: Ebert, W. L.; Bakel, A. J.; Bowers, D. L.; Buck, E. C. & Emery, J. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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An indirect sensing technique for diesel fuel quantity control. Progress report, April 1--June 30, 1998

Description: This reports on a project to develop an indirect sensing technique for diesel fuel quantity control. Development has continued on a vehicle-installed prototype for EPA certification and demonstration. Focus of development is on the use of this technology for retrofitting existing diesel vehicles to reduce emissions rather than exclusively upon deployment in the OEM market. Technical obstacles that have been encountered and their solutions and remaining project tasks are described.
Date: August 31, 1998
Creator: MacCarley, C. Arthur
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Formation of drug-bearing vesicles in mixed colloids of bile salts and phosphatidylcholine

Description: This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The authors used small-angle neutron scattering to study drug interactions with mixed colloids of bile salt and phosphatidylcholine. Because the mixed colloids form liposomes spontaneously, this system is a model for drug-bile interactions that are important in understanding the efficacy of oral drug formulations and in advanced applications for lip… more
Date: November 1, 1997
Creator: Hjelm, Rex P.; Mang, Joe; Hofmann, Alan F.; Schteingart, Claudio; Alkan-Onyuksel, Hayat & Ayd, Sharon
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Stability of purgeable VOCs in water samples during pre-analytical holding. Part 2: Analyses by an EPA regional laboratory

Description: This study was undertaken to examine the hypothesis that prevalent and priority purgeable VOCs in properly preserved water samples are stable for at least 28 days. For the purposes of this study, VOCs were considered functionally stable if concentrations measured after 28 days did not change by more than 10% from the initial values. An extensive stability experiment was performed on freshly-collected surface water spiked with a suite of 44 purgeable VOCs. The spiked water was then distributed i… more
Date: March 1, 1997
Creator: West, Olivia R.; Bayne, Charles K.; Siegrist, Robert L.; Holden, William L. & Bottrell, David W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An infrared/video fusion system for military robotics

Description: Sensory information is critical to the telerobotic operation of mobile robots. In particular, visual sensors are a key component of the sensor package on a robot engaged in urban military operations. Visual sensors provide the robot operator with a wealth of information including robot navigation and threat assessment. However, simple countermeasures such as darkness, smoke, or blinding by a laser, can easily neutralize visual sensors. In order to provide a robust visual sensing system, an infr… more
Date: August 5, 1997
Creator: Davis, Anthony W. & Roberts, Randy S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Numerical simulation of explosive volcanism and its effects on the atmosphere

Description: This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The objective of this project was to begin work on combining two modeling approaches in order to advance the state-of-the-art in simulating and predicting explosive volcanic eruption dynamics and their effects. The authors began applying the CFDLIB family of codes for the near field (high temperature, velocity, and particle concentration) region of an… more
Date: December 31, 1998
Creator: Valentine, Greg A. & Bossert, James E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electrochemical and spectroscopic evaluation of lithium intercalation in tailored polymethacrylonitrile carbons

Description: Disordered polymethacrylonitrile (PMAN) carbon monoliths have been studied as potential tailored electrodes for lithium ion batteries. A combination of electrochemical and surface spectroscopic probes have been used to investigate irreversible loss mechanisms. Voltammetric measurements show that Li intercalates readily into the carbon at potentials 1V positive of the reversible Li potential. The coulometric efficiency rises rapidly from 50% for the first potential cycle to greater than 85% for … more
Date: December 1, 1997
Creator: Zavadil, Kevin R.; Guidotti, Ronald A. & Even, William R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Uncooled Thin Film Pyroelectric Ir Detector With Aerogel Thermal Isolation

Description: Uncooled pyroelectric IR imaging systems, such as night vision goggles, offer important strategic advantages in battlefield scenarios and reconnaissance surveys. Until now, the current technology for fabricating these devices has been limited by low throughput and high cost which ultimately limit the availability of these sensor devices. We have developed and fabricated an alternative design for pyroelectric IR imaging sensors that utilizes a multilayered thin film deposition scheme to create a… more
Date: January 1, 1998
Creator: Ruffner, J. A.; Clem, P. G. & Tuttle, B. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Data mining

Description: This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The objective of this project was to develop and implement data mining technology suited to the analysis of large collections of unstructured data. This has taken the form of a software tool, PADMA (Parallel Data Mining Agents), which incorporates parallel data accessing, parallel scalable hierarchical clustering algorithms, and a web-based user inter… more
Date: December 31, 1998
Creator: Lee, Kenneth; Kargupta, Hillol; Stafford, Brian G.; Buescher, Kevin L. & Ravindran, Binoy
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Exploration of technologies of use to civil security forces

Description: This is the final report of a two-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The objective was to determine whether armor tile technology could be used to solve problems of civil law enforcement as identified by the New Mexico State Police. Most of the effort focused on the design and construction of a lightweight, portable box that could contain the shrapnel and redirect the blast from a steel-pipe/black-powder bomb. The bomb… more
Date: December 1, 1998
Creator: Farnum, Eugene H.; Petrovic, John; McClellan, Kenneth; Trujillo, Eralio; Neuman, Angelique; Lounsbury, Brad et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application of advanced seismic reflection imaging techniques to mapping permeable zones at Dixie Valley, Nevada. Final technical report

Description: Multifold seismic reflection data from the Dixie Valley geothermal field in Nevada were reprocessed using a nonlinear optimization scheme called simulated annealing to model subsurface acoustic velocities, followed by a pre-stack Kirchhoff migration to produce accurate and detailed depth-migrated images of subsurface structure. In contrast to conventional processing techniques, these methods account for significant lateral variations in velocity and thus have the potential ability to image stee… more
Date: February 18, 1998
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fundamental and applied studies of helium ingrowth and aging in plutonium

Description: This is the final report of a two-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The purpose of this project was to develop new capabilities to assess the nucleation and growth of helium-associated defects in aged plutonium metal. This effort involved both fundamental and applied models to assist in predicting the transport and kinetics of helium in the metal lattice as well as ab initio calculations of the disposition of gallium … more
Date: December 31, 1998
Creator: Stevens, Michael F.; Zocco, Thomas; Albers, Robert; Becker, J. David; Walter, Kevin; Cort, Barbara et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fuel-cycle energy and emissions impacts of tripled fuel economy vehicles

Description: This paper presents estimates of the full cycle energy and emissions impacts of light-duty vehicles with tripled fuel economy (3X vehicles) as currently being developed by the Partnership for a New Generation of Vehicles (PNGV). Seven engine and fuel combinations were analyzed: reformulated gasoline, methanol, and ethanol in spark-ignition, direct-injection engines; low sulfur diesel and dimethyl ether in compression-ignition, direct-injection engines; and hydrogen and methanol in fuel-cell veh… more
Date: December 31, 1998
Creator: Mintz, Marianne M.; Wang, Michael Q. & Vyas, Anant D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Future{at}Labs.Prosperity Game{trademark}

Description: Prosperity Games{trademark} are an outgrowth and adaptation of move/countermove and seminar War Games, Prosperity Games{trademark} are simulations that explore complex issues in a variety of areas including economics, politics, sociology, environment, education, and research. These issues can be examined from a variety of perspectives ranging from global, macroeconomic and geopolitical viewpoint down to the details of customer/supplier/market interactions specific industries. All Prosperity Gam… more
Date: October 1, 1996
Creator: Beck, David F.; Boyack, Kevin W. & Berman, Marshall
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

System design description for the whole element furnace testing system

Description: This document provides a detailed description of the Hanford Spent Nuclear Fuel (SNF) Whole Element Furnace Testing System located in the Postirradiation Testing Laboratory G-Cell (327 Building). Equipment specifications, system schematics, general operating modes, maintenance and calibration requirements, and other supporting information are provided in this document. This system was developed for performing cold vacuum drying and hot vacuum drying testing of whole N-Reactor fuel elements, whi… more
Date: May 1, 1998
Creator: Ritter, G. A.; Marschman, S. C.; MacFarlan, P. J. & King, D. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Probabilistic safety assessment for high-level waste tanks at Hanford

Description: Los Alamos National Laboratory has performed a comprehensive probabilistic safety assessment (PSA), including consideration of external events, for the 18 tank farms at the Hanford Tank Farm (HTF). This work was sponsored by the Department of Energy/Environmental Restoration and Waste Management Division (DOE/EM).
Date: December 31, 1996
Creator: Sullivan, L. Harold; MacFarlane, D. R. & Stack, D. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A water balance study of four landfill cover designs varying in slope for semiarid regions

Description: The goal of disposing of radioactive and hazardous waste in shallow landfills is to reduce risk to human health and to the environment by isolating contaminants until they no longer pose a hazard. In order to achieve this, the performance of a landfill cover design without an engineered barrier (Conventional Design) was compared with three designs containing either a hydraulic barrier (EPA Design) or a capillary barrier (Loam and Clay Loam Capillary Barrier Designs). Water balance parameters we… more
Date: February 1, 1997
Creator: Nyhan, J. W.; Schofield, T. G. & Salazar, J. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Laser weld penetration estimation using temperature measurements

Description: Penetration depth is an important factor critical to the quality of a laser weld. This paper examines the feasibility of using temperature measurements on the bottom surface of the work-piece to estimate weld penetration. A three-dimensional analytical model relating penetration depth, weld bead width and welding speed to temperature distribution at the bottom surface of the workpiece is developed. Temperatures on the bottom surface of the workpiece are measured using infrared thermocouples loc… more
Date: October 1, 1997
Creator: Lankalapalli, Kishore N.; Tu, Jay F.; Leong, Keng H. & Gartner, Mark
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nonlinear processes in earthquakes

Description: This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). Three-dimensional, elastic-wave-propagation calculations were performed to define the effects of near-source geologic structure on the degree to which seismic signals produced by earthquakes resemble {open_quotes}non-double-couple{close_quotes} sources. Signals from sources embedded in a subducting slab showed significant phase and amplitude differences c… more
Date: December 31, 1998
Creator: Jones, Eric M. & Frohlich, Clifford
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Regional to global scale atmospheric effects of the emerging mainland Chinese transportation system

Description: This is the final report of a one-year Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). The People`s Republic of China will be moving toward considerably increased use of motorized vehicles over the next human generation. Estimates are for a fleet of 100 million vehicles or more. Large increases in ozone and other types of pollution associated with automobiles will result and this will have significant impact across Asia and into the Pacific.… more
Date: October 1, 1997
Creator: Elliott, Scott; Kao, C. Y. J.; Streit, Gerald E.; McCreary, Edward I.; Brown, Michael J.; Shen, Mei et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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