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Low-Level Radioactive Waste: Disposal Availability Adequate in the Short Term, but Oversight Needed to Identify Any Future Shortfalls

Description: A letter report issued by the General Accounting Office with an abstract that begins "Low-level radioactive waste (LLRW) management concerns persist despite enactment of the LLRW Policy Act of 1980, as amended, which made states responsible for providing for disposal of most LLRW. It also enumerated guidance and oversight responsibilities for DOE and NRC. When GAO last reported on LLRW disposal, in 1999, the only existing facility accepting the more highly radioactive types of LLRW (known as cl… more
Date: June 10, 2004
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Reciprocating Pump Systems for Space Propulsion

Description: Small propellant pumps can reduce rocket hardware mass, while increasing chamber pressure to improve specific impulse. The maneuvering requirements for planetary ascent require an emphasis on mass, while those of orbiting spacecraft indicate that I{sub SP} should be prioritized during pump system development. Experimental efforts include initial testing with prototype lightweight components while raising pump efficiency to improve system I{sub SP}.
Date: June 10, 2004
Creator: Whitehead, J C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

New Performance Levels for TPV Front Surface Filters

Description: Front surface spectral control filters significantly improve the efficiency of thermophotovoltaic (TPV) converters. Tandem filter designs for 0.52 and 0.60 eV cells were fabricated. Energy and angle weighted spectral efficiencies of {approx}83% for the 0.52 eV application and {approx}76% for the 0.60 eV applications were achieved with {approx}78% angle weighted above bandgap transmission. Manufacturing demonstrations of both designs were completed with good yield. Design improvements were made … more
Date: June 10, 2004
Creator: Rahmlow, T. D., Jr.; Lazo-Wasem, J. E.; Gratrix, E. J.; Fourspring, P. M. & DePoy, D. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

PHYSICAL, CHEMICAL AND STRUCTURAL EVOLUTIION OF ZEOLITE-CONTAINING WASTE FORMS PRODUCED FROM METAKAOLINITE AND CALCINED SODUIM BEARING WASTE (HLW AND/OR LLW)

Description: Zeolites are extremely versatile. They can adsorb liquids and gases and serve as cation exchange media. They occur in nature as well cemented deposits. The Romans used blocks of zeolitized tuff as a building material. Using zeolites for the management of radioactive waste is not new, but a process by which the zeolites can be made to act as a cementing agent is. Zeolitic materials are relatively easy to synthesize from a wide range of both natural and man-made precursors. The process under stud… more
Date: June 10, 2004
Creator: Grutzeck, Michael W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Stability of High-Level Waste Forms

Description: The objective of the proposed effort is to use a new approach to develop solution models of complex waste glass systems and spent fuel that are predictive with regard to composition, phase separation, and volatility. The effort will also yield thermodynamic values for waste components that are fundamentally required for corrosion models used to predict the leaching/corrosion behavior for waste glass and spent fuel material. This basic information and understanding of chemical behavior can subse… more
Date: June 10, 2004
Creator: Besmann, Theodore M. & Vienna, John D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

SIMULATION OF INTENSE BEAMS FOR HEAVY ION FUSION

Description: Computer simulations of intense ion beams play a key role in the Heavy Ion Fusion research program. Along with analytic theory, they are used to develop future experiments, guide ongoing experiments, and aid in the analysis and interpretation of experimental results. They also afford access to regimes not yet accessible in the experimental program. The U.S. Heavy Ion Fusion Virtual National Laboratory and its collaborators have developed state-of-the art computational tools, related both to cod… more
Date: June 10, 2004
Creator: Friedman, A
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Safe and Environmentally Acceptable Sol-gel Derived Pyrophoric Pyrotechnics

Description: It was demonstrated that highly porous sol-gel derived iron (III) oxide materials could be reduced to sub-micron-sized metallic iron by heating the materials to intermediate temperatures in a hydrogen atmosphere. Through a large number of experiments complete reduction of the sol-gel based materials was realized with a variety of hydrogen-based atmospheres (25-100% H{sub 2} in Ar, N{sub 2}, CO{sub 2}, or CO) at intermediate temperatures (350 C to 700 C). All of the resulting sol-gel-derived met… more
Date: June 10, 2004
Creator: Simspon, R L; Satcher, J H & Gash, A
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The International Monetary Fund: Future Directions

Description: This report discusses seven proposed ways that different authors believe the IMF should be changed. Each is discussed and analyzed. In this way, the report hopes to give readers a better understanding of the basic issues and choices which affect the future direction of the IMF.
Date: June 10, 2004
Creator: Sanford, Jonathan E. & Weiss, Martin A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Rapid Deployment of Rich Catalytic Combustion

Description: The overall objective of this research under the Turbines Program is the deployment of fuel flexible rich catalytic combustion technology into high-pressure ratio industrial gas turbines. The resulting combustion systems will provide fuel flexibility for gas turbines to burn coal derived synthesis gas or natural gas and achieve NO{sub x} emissions of 2 ppmvd or less (at 15 percent O{sub 2}), cost effectively. This advance will signify a major step towards environmentally friendly electric power… more
Date: June 10, 2004
Creator: Tuthill, Richard S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Global Climate Change: The Kyoto Protocol

Description: This report discusses the Kyoto Protocol to the United Nations Framework Convention on Climate Change (UNFCCC) that was completed December 11, 1997, committing the industrialized nations to specified, legally binding reductions in emissions of six “greenhouse gases.”
Date: June 10, 2004
Creator: Fletcher, Susan R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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