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The advanced computational testing and simulation toolkit (ACTS)

Description: During the past decades there has been a continuous growth in the number of physical and societal problems that have been successfully studied and solved by means of computational modeling and simulation. Distinctively, a number of these are important scientific problems ranging in scale from the atomic to the cosmic. For example, ionization is a phenomenon as ubiquitous in modern society as the glow of fluorescent lights and the etching on silicon computer chips; but it was not until 1999 that… more
Date: May 21, 2002
Creator: Drummond, L. A. & Marques, O. A.
Item Type: Refine your search to only Article
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Advanced High-Temperature Reactor for Production of Electricity and Hydrogen: Molten-Salt-Coolant, Graphite-Coated-Particle-Fuel

Description: The objective of the Advanced High-Temperature Reactor (AHTR) is to provide the very high temperatures necessary to enable low-cost (1) efficient thermochemical production of hydrogen and (2) efficient production of electricity. The proposed AHTR uses coated-particle graphite fuel similar to the fuel used in modular high-temperature gas-cooled reactors (MHTGRs), such as the General Atomics gas turbine-modular helium reactor (GT-MHR). However, unlike the MHTGRs, the AHTR uses a molten salt coola… more
Date: February 21, 2002
Creator: Forsberg, Charles W.
Item Type: Refine your search to only Report
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Advanced Hydrogen Transport Membranes for Vision 21 Fossil Fuel Plants

Description: During this quarter, work was focused on characterizing the stability of layered composite membranes in a one hundred percent permeate environment. Permeation data was also collected on cermets as a function of thickness. A thin film deposition procedure was used to deposit dense thin BCY/Ni onto a tubular porous support. Thin film tubes were then tested for permeation at ambient pressure. Process flow diagrams were prepared for inclusion of hydrogen separation membranes into IGCC power plants … more
Date: October 21, 2004
Creator: Evenson, Carl R.; Sammells, Anthony F.; Treglio, Richard T.; Balachandran, U.; Kleiner, Richard N.; Stephan, James E. et al.
Item Type: Refine your search to only Report
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Advanced Oil Recovery Technologies for Improved Recovery from Slope Basin Clastic Reservoirs, Nash Draw Brushy Canyon Pool, Eddy County, New Mexico, Class III

Description: The overall objective of this project is to demonstrate that a development program based on advanced reservoir management methods can significantly improve oil recovery at the Nash Draw Pool (NDP). The plan includes developing a control area using standard reservoir management techniques and comparing its performance to an area developed using advanced reservoir management methods. Specific goals are (1) to demonstrate that an advanced development drilling and pressure maintenance program can s… more
Date: February 21, 2002
Creator: Murphy, Michael B.
Item Type: Refine your search to only Report
open access

Advanced sensors for real-time control of advanced natural-gas reciprocating engine combustion.

Description: This is the final report of a three-year project under a Department of Energy Advanced Reciprocating Engine Systems contract. The goal of this project is to develop advanced sensors for real-time combustion monitoring of advanced natural-gas reciprocating engines. Two sensor technologies, ion-mobility spectrometry (IMS) and acoustic gas sensing, were tested for detection of NO{sub x} emissions and monitoring of natural-gas composition. This project examined two novel approaches: use of a corona… more
Date: November 21, 2003
Creator: Sheen, S. H.; Chien, H. T. & Raptis, A. C.
Item Type: Refine your search to only Report
open access

ADVANCED TURBINE SYSTEMS PROGRAM

Description: Natural gas combustion turbines are rapidly becoming the primary technology of choice for generating electricity. At least half of the new generating capacity added in the US over the next twenty years will be combustion turbine systems. The Department of Energy has cosponsored with Siemens Westinghouse, a program to maintain the technology lead in gas turbine systems. The very ambitious eight year program was designed to demonstrate a highly efficient and commercially acceptable power plant, w… more
Date: April 21, 2004
Creator: Gaul, Gregory
Item Type: Refine your search to only Report
open access

Advanced Wavefront Control Techniques

Description: Programs at LLNL that involve large laser systems--ranging from the National Ignition Facility to new tactical laser weapons--depend on the maintenance of laser beam quality through precise control of the optical wavefront. This can be accomplished using adaptive optics, which compensate for time-varying aberrations that are often caused by heating in a high-power laser system. Over the past two decades, LLNL has developed a broad capability in adaptive optics technology for both laser beam con… more
Date: February 21, 2001
Creator: Olivier, S. S.; Brase, J. M.; Avicola, K.; Thompson, C. A.; Kartz, M. W.; Winters, S. et al.
Item Type: Refine your search to only Report
open access

Advances in HFE Methods and Their Implications for Regulatory Reviews.

Description: There is renewed interest in the United States (U.S.) to construct new Generation III and III+ reactors within the next decade and Generation IV reactors in the future. Licensing by the U.S. Nuclear Regulatory Commission (NRC) is a significant consideration and these new plants may pose new challenges. One such challenge is the advances in human factors engineering (HFE) methods that are used. These methods are used to design and evaluate the HFE aspects of a plant, such as the human-system int… more
Date: March 21, 2006
Creator: O'hara, J.; Persensky, J. & Szabo, A.
Item Type: Refine your search to only Article
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Advances in Target Design for Heavy-Ion Fusion

Description: Over the past few years, the emphasis in heavy ion target design has moved from the distributed radiator target to the 'hybrid' target because the hybrid target allows a larger beam focal spot than the distributed radiator ({approx} 5 mm radius rather than {approx} 2 mm radius). The larger spot relaxes some of the requirements on the driver, but introduces some new target physics issues. Most notable is the use of shine shields and shims in the hohlraum to achieve symmetry rather than achieving… more
Date: June 21, 2005
Creator: Callahan, D. A.; Tabak, M.; Bennett, G. R.; Cuneo, M. E.; Vesey, R. A.; Nikroo, A. et al.
Item Type: Refine your search to only Article
open access

The Adverse Effect Wage Rate (AEWR)

Description: This report introduces the adverse effect wage rate (AEWR) and the concerns out of which it grew, from the perspective of labor policy (not of immigration policy). American agricultural employers have long utilized foreign workers on a temporary basis, regarding them as an important manpower resource. Often employed at low wages and under adverse conditions, such alien workers, some argue, may compete unfairly with U.S. workers. To mitigate any "adverse effect" for the domestic workforce, a sys… more
Date: January 21, 2005
Creator: Whittaker, William G.
Item Type: Refine your search to only Report
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