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U-Mo Foil/Cladding Interactions in Friction Stir Welded Monolithic RERTR Fuel Plates
Interaction between U-Mo fuel and Al has proven to dramatically impact the overall irradiation performance of RERTR dispersion fuels. It is of interest to better understand how similar interactions may affect the performance of monolithic fuel plates, where a uranium alloy fuel is sandwiched between aluminum alloy cladding. The monolithic fuel plate removes the fuel matrix entirely, which reduces the total surface area of the fuel that is available to react with the aluminum and moves the interface between the fuel and cladding to a colder region of the fuel plate. One of the major fabrication techniques for producing monolithic fuel plates is friction stir welding. This paper will discuss the interactions that can occur between the U-Mo foil and 6061 Al cladding when applying this fabrication technique. It has been determined that the time at high temperatures should be limited as much as is possible during fabrication or any post-fabrication treatment to reduce as much as possible the interactions between the foil and cladding. Without careful control of the fabrication process, significant interaction between the U-Mo foil and Al alloy cladding can result. The reaction layers produced from such interactions can exhibit notably different morphologies vis-à -vis those typically observed …
Date:
October 1, 2006
Creator:
Keiser, D. D.; Jue, J. F. & Clark, C. R.
Object Type:
Article
System:
The UNT Digital Library
U.N. Convention Against Torture (CAT): Overview and Application to Interrogation Techniques
None
Date:
January 25, 2006
Creator:
Garcia, Michael John
Object Type:
Report
System:
The UNT Digital Library
The U.N. Convention Against Torture: Overview of U.S. Implementation Policy Concerning the Removal of Aliens
None
Date:
January 26, 2006
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The U.N. Convention Against Torture: Overview of U.S. Implementation Policy Concerning the Removal of Aliens
None
Date:
April 4, 2006
Creator:
Garcia, Michael John
Object Type:
Report
System:
The UNT Digital Library
The U.N. Law of the Sea Convention and the United States: Developments Since October 2003
None
Date:
January 27, 2006
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
U-PLANT GEOGRAPHIC ZONE CLEANUP PROTOTYPE
The U Plant geographic zone (UPZ) occupies 0.83 square kilometers on the Hanford Site Central Plateau (200 Area). It encompasses the U Plant canyon (221-U Facility), ancillary facilities that supported the canyon, soil waste sites, and underground pipelines. The UPZ cleanup initiative coordinates the cleanup of the major facilities, ancillary facilities, waste sites, and contaminated pipelines (collectively identified as ''cleanup items'') within the geographic zone. The UPZ was selected as a geographic cleanup zone prototype for resolving regulatory, technical, and stakeholder issues and demonstrating cleanup methods for several reasons: most of the area is inactive, sufficient characterization information is available to support decisions, cleanup of the high-risk waste sites will help protect the groundwater, and the zone contains a representative cross-section of the types of cleanup actions that will be required in other geographic zones. The UPZ cleanup demonstrates the first of 22 integrated zone cleanup actions on the Hanford Site Central Plateau to address threats to groundwater, the environment, and human health. The UPZ contains more than 100 individual cleanup items. Cleanup actions in the zone will be undertaken using multiple regulatory processes and decision documents. Cleanup actions will include building demolition, waste site and pipeline excavation, and the …
Date:
February 1, 2006
Creator:
ROMINE, L.D.
Object Type:
Article
System:
The UNT Digital Library
U.S. Aerospace Industry: Progress in Implementing Aerospace Commission Recommendations, and Remaining Challenges
A letter report issued by the Government Accountability Office with an abstract that begins "The U.S. aerospace industry's wide-ranging activities--including commercial aviation, national security, and space exploration--make it critical to the economic health and strategic strength of our nation. However, the industry faces challenges, such as a national air traffic management system that, in its present form, cannot handle expected increases in demand; an aging aerospace workforce; and an increasingly competitive global market. In response to these and other challenges, Congress established the Commission on the Future of the United States Aerospace Industry in 2001 to recommend potential actions by the federal government and others to support a robust aerospace industry in the 21st century. In 2002, the Commission made recommendations to address these challenges. This report discusses (1) the extent to which federal agencies have addressed selected Commission recommendations and (2) the challenges that remain in addressing the recommendations. Based on the opinions of former Commissioners and GAO research, GAO selected recommendations dealing with the national airspace system, space policy, government-wide management structure, international issues, the aerospace workforce, and research and development. This report is based on reviews of agency documents, literature, and interviews with aerospace experts and officials …
Date:
September 13, 2006
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
U.S. Agricultural Policy Response to WTO Cotton Decision
None
Date:
March 31, 2006
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
U.S. Agricultural Policy Response to WTO Cotton Decision
None
Date:
September 8, 2006
Creator:
Schnepf, Randy
Object Type:
Report
System:
The UNT Digital Library
U.S. Agricultural Policy Response to WTO Cotton Decision
None
Date:
January 18, 2006
Creator:
Schnepf, Randy
Object Type:
Report
System:
The UNT Digital Library
U.S. Agricultural Trade: Trends, Composition, Direction, and Policy
Leading markets for U.S. agricultural exports are Canada, Mexico, Japan, China, the European Union (EU), Taiwan, and Korea. The United States dominates world markets for corn, wheat, and cotton. Most U.S. agricultural imports are high-value products. The biggest import suppliers are Canada and the EU. Among the fastest-growing markets for U.S. agricultural exports are Canada and Mexico. Both the EU and the U.S. subsidize their agricultural sectors, but overall the EU out subsidizes the U.S. The U.S. has the most diverse food aid programs; others limit food aid to development assistance and emergencies.
Date:
September 25, 2006
Creator:
Hanrahan, Charles; Banks, Beverly & Canada, Carol
Object Type:
Report
System:
The UNT Digital Library
U.S. Agricultural Trade: Trends, Composition, Direction, and Policy
Leading markets for U.S. agricultural exports are Canada, Mexico, Japan, China, the European Union (EU), Taiwan, and Korea. The United States dominates world markets for corn, wheat, and cotton. Most U.S. agricultural imports are high-value products. The biggest import suppliers are Canada and the EU. Among the fastest-growing markets for U.S. agricultural exports are Canada and Mexico. Both the EU and the U.S. subsidize their agricultural sectors, but overall the EU out subsidizes the U.S. The U.S. has the most diverse food aid programs; others limit food aid to development assistance and emergencies.
Date:
August 11, 2006
Creator:
Hanrahan, Charles; Banks, Beverly & Canada, Carol
Object Type:
Report
System:
The UNT Digital Library
U.S. Agricultural Trade: Trends, Composition, Direction, and Policy
None
Date:
August 11, 2006
Creator:
Hanrahan, Charles E.; Banks, Beverly & Canada, Carol
Object Type:
Report
System:
The UNT Digital Library
U.S. Agricultural Trade: Trends, Composition, Direction, and Policy
None
Date:
August 11, 2006
Creator:
Hanrahan, Charles E.; Banks, Beverly & Canada, Carol
Object Type:
Report
System:
The UNT Digital Library
U.S. Agricultural Trade: Trends, Composition, Direction, and Policy
None
Date:
September 25, 2006
Creator:
Hanrahan, Charles E.; Banks, Beverly & Canada, Carol
Object Type:
Report
System:
The UNT Digital Library
U.S. Aid to the Palestinians
None
Date:
February 2, 2006
Creator:
Sharp, Jeremy M.
Object Type:
Report
System:
The UNT Digital Library
U.S. Aid to the Palestinians
None
Date:
February 2, 2006
Creator:
Sharp, Jeremy M.
Object Type:
Report
System:
The UNT Digital Library
U.S. Aims for Zero-Energy: Support for PV on New Homes
As a market segment for solar photovoltaic (PV) adoption, new homes have a number of attractive attributes. Homebuyers can easily roll the cost of the PV system into their mortgage and, with rebates or other financial incentives, potentially realize an immediate net positive cash flow from the investment. PV system performance can be optimized by taking roof orientation, shading, and other structural factors into account in the design of new homes. Building-integrated photovoltaics (BIPV), which are subject to fewer aesthetic concerns than traditional, rack-mounted systems, are well-suited to new construction applications. In large new residential developments, costs can be reduced through bulk purchases and scale economies in system design and installation. Finally, the ability to install PV as a standard feature in new developments - like common household appliances - creates an opportunity to circumvent the high transaction costs and other barriers typically confronted when each individual homeowner must make a distinct PV purchase decision.
Date:
May 11, 2006
Creator:
Barbose, Galen; Wiser, Ryan & Bolinger, Mark
Object Type:
Article
System:
The UNT Digital Library
U.S. and Coalition Military Operations in Afghanistan: Issues for Congress
None
Date:
June 9, 2006
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
U.S. and Coalition Military Operations in Afghanistan: Issues for Congress
None
Date:
December 11, 2006
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
U.S. and International Responses to the Global Spread of Avian Flu: Issues for Congress
This report will provide an account of global H5N1-related human infections and deaths, outline U.S. government and international responses to the global spread of H5N1, discuss situations in various countries affected by H5N1, and present some foreign policy issues for Congress.
Date:
February 6, 2006
Creator:
Salaam-Blyther, Tiaji & Chanlett-Avery, Emma
Object Type:
Report
System:
The UNT Digital Library
U.S. and International Responses to the Global Spread of Avian Flu: Issues for Congress
None
Date:
January 9, 2006
Creator:
Salaam-Blyther, Tiaji & Chanlett-Avery, Emma
Object Type:
Report
System:
The UNT Digital Library
U.S. and International Responses to the Global Spread of Avian Flu: Issues for Congress
None
Date:
January 11, 2006
Creator:
Salaam-Blyther, Tiaji & Chanlett-Avery, Emma
Object Type:
Report
System:
The UNT Digital Library
U.S. and International Responses to the Global Spread of Avian Flu: Issues for Congress
None
Date:
April 4, 2006
Creator:
Salaam-Blyther, Tiaji
Object Type:
Report
System:
The UNT Digital Library