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3,956 Matching Results
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Creep of Structural Nuclear Composites
A research program has been established to investigate fiber reinforced ceramic composites to be used as control rod components within a Very High Temperature Reactor (VHTR) design. Two candidate systems have been identified, carbon fiber reinforced carbon (Cf/C) and silicon carbide fiber reinforced silicon carbide (SiCf/SiC) composites. One of the primary degradation mechanisms anticipated for these core components is high temperature thermal and irradiation enhanced creep. As a consequence, high temperature test equipment, testing methodologies, and test samples for very high temperature (up to 1600º C) tensile strength and long duration creep studies have been established. Actual testing of both tubular and flat, "dog-bone"-shaped tensile composite specimens will begin next year. Since there is no precedence for using ceramic composites within a nuclear reactor, ASTM standard test procedures are currently being established from these high temperature mechanical tests.
Date:
September 1, 2005
Creator:
Windes, Will & Lloyd, R. W.
Object Type:
Report
System:
The UNT Digital Library
Critical Experiments that Simulated Damp MOX Powders - Do They Meet the Need?
The OECD Nuclear Energy Agency (NEA) Working Party on Nuclear Criticality Safety (WPNCS) identified the MOX fuel manufacturing process as an area in which there is a need for additional integral benchmark data. The specific need focused on damp MOX powders. The WPNCS was ultimately asked by the NEA Nuclear Science Committee (NSC) to provide the framework for the selection and performance of new experiments that fill the identified need. A set of criteria was established to enable uniform comparison of experimental proposals with generic MOX application data. Criteria were established for five general characteristics: (1) neutronic parameters, (2) type of experiments, (3) financial aspects, (4) schedule, and (5) other considerations. Proposals were judged most importantly on their ability to match the neutronic parameters of predetermined MOX applications. The neutronic parameters that formed the basis for comparison included core average values (not local values) for flux, fission and capture rate; detailed balance data (fission and capture) for the main isotopes (Actinides, H and O); sensitivity coefficients to important nuclear reactions (fission, capture, elastic and inelastic scatter, nu-bar, mu-bar) for all uranium and plutonium isotopes, hydrogen, and oxygen; sensitivity profiles to the main nuclear reactions for uranium and plutonium isotopes; energy …
Date:
September 1, 2005
Creator:
Briggs, J. Blair; Nouri, Dr. Ali & Nordborg, Dr. Claes
Object Type:
Article
System:
The UNT Digital Library
The Cross Timbers Gazette (Flower Mound, Tex.), Vol. 31, No. 9, Ed. 1, September 2005
Monthly newspaper from Flower Mound, Texas that includes news and information for communities in southern Denton County along with advertising.
Date:
September 2005
Creator:
Johnson, LaRue
Object Type:
Newspaper
System:
The Portal to Texas History
Cryogenics for the MuCool Test Area (MTA)
MuCool Test Area (MTA) is a complex of buildings at Fermi National Accelerator Laboratory, which are dedicated to operate components of a cooling cell to be used for Muon Collider and Neutrino Factory R&D. The long-term goal of this facility is to test ionization cooling principles by operating a 25-liter liquid hydrogen (LH{sub 2}) absorber embedded in a 5 Tesla superconducting solenoid magnet. The MTA solenoid magnet will be used with RF cavities exposed to a high intensity beam. Cryogens used at the MTA include LHe, LN{sub 2} and LH{sub 2}. The latter dictates stringent system design for hazardous locations. The cryogenic plant is a modified Tevatron refrigerator based on the Claude cycle. The implementation of an in-house refrigerator system and two 300 kilowatt screw compressors is under development. The helium refrigeration capacity is 500 W at 14 K. In addition the MTA solenoid magnet will be batch-filled with LHe every 2 days using the same cryo-plant. This paper reviews cryogenic systems used to support the Muon Collider and Neutrino Factory R&D programs and emphasizes the feasibility of handling cryogenic equipment at MTA in a safe manner.
Date:
September 1, 2005
Creator:
Darve, Christine; Norris, Barry; Pei, Liu-Jin & /Fermilab
Object Type:
Article
System:
The UNT Digital Library
Current topics in D0 B physics
None
Date:
September 1, 2005
Creator:
Maciel, Arthur
Object Type:
Presentation
System:
The UNT Digital Library
CW Mode of Operation of a Proton FFAG Accelerator
N/A
Date:
September 1, 2005
Creator:
A., Ruggiero
Object Type:
Report
System:
The UNT Digital Library
DART offers passes to Hurricane Katrina evacuees
News release about DART's participation in supporting evacuees from Hurricane Katrina.
Date:
September 1, 2005
Creator:
Lyons, Morgan
Object Type:
Text
System:
The Portal to Texas History
Decommissioning of Experimental Breeder Reactor - II Complex, Post Sodium Draining
The Experimental Breeder Reactor - II (EBR-II) was shutdown in September 1994 as mandated by the United States Department of Energy. This sodium-cooled reactor had been in service since 1964. The bulk sodium was drained from the primary and secondary systems and processed. Residual sodium remaining in the systems after draining was converted into sodium bicarbonate using humid carbon dioxide. This technique was tested at Argonne National Laboratory in Illinois under controlled conditions, then demonstrated on a larger scale by treating residual sodium within the EBR-II secondary cooling system, followed by the primary tank. This process, terminated in 2002, was used to place a layer of sodium bicarbonate over all exposed surfaces of sodium. Treatment of the remaining EBR-II sodium is governed by the Resource Conservation and Recovery Act (RCRA). The Idaho Department of Environmental Quality issued a RCRA Operating Permit in 2002, mandating that all hazardous materials be removed from EBR-II within a 10 year period, with the ability to extend the permit and treatment period for another 10 years. A preliminary plan has been formulated to remove the remaining sodium and NaK from the primary and secondary systems using moist carbon dioxide, steam and nitrogen, and a water …
Date:
September 1, 2005
Creator:
Michelbacher, J. A. (Bart); Henslee, S. Paul; Knight, Collin J. & Sherman, Steven R.
Object Type:
Article
System:
The UNT Digital Library
Demand Shifting With Thermal Mass in Large Commercial Buildings:Field Tests, Simulation and Audits
The principle of pre-cooling and demand limiting is to pre-cool buildings at night or in the morning during off-peak hours, storing cooling in the building thermal mass and thereby reducing cooling loads and reducing or shedding related electrical demand during the peak periods. Cost savings are achieved by reducing on-peak energy and demand charges. The potential for utilizing building thermal mass for load shifting and peak demand reduction has been demonstrated in a number of simulation, laboratory, and field studies (Braun 1990, Ruud et al. 1990, Conniff 1991, Andresen and Brandemuehl 1992, Mahajan et al. 1993, Morris et al. 1994, Keeney and Braun 1997, Becker and Paciuk 2002, Xu et al. 2003). This technology appears to have significant potential for demand reduction if applied within an overall demand response program. The primary goal associated with this research is to develop information and tools necessary to assess the viability of and, where appropriate, implement demand response programs involving building thermal mass in buildings throughout California. The project involves evaluating the technology readiness, overall demand reduction potential, and customer acceptance for different classes of buildings. This information can be used along with estimates of the impact of the strategies on energy use …
Date:
September 1, 2005
Creator:
Xu, Peng; Haves, Philip; Piette, Mary Ann & Zagreus, Leah
Object Type:
Report
System:
The UNT Digital Library
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission pertaining to an interim reply on contractors.
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission pertaining to an interim reply on contractors.
Date:
September 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission pertaining to Naval Support Activity New Orleans.
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission pertaining to Naval Support Activity New Orleans.
Date:
September 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding AF/IE letter to Senator Domenici, NM pertaining to Airborne Laser.
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding AF/IE letter to Senator Domenici, NM pertaining to Airborne Laser.
Date:
September 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding AFIP.
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding AFIP.
Date:
September 1, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding BRAC proposed move of DCMA to Ft. Lee, VA.
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding BRAC proposed move of DCMA to Ft. Lee, VA.
Date:
September 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding Cecil Field.
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding Cecil Field.
Date:
September 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding COBRA run to account for additional TACOM positions at Rock Island.
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding COBRA run to account for additional TACOM positions at Rock Island.
Date:
September 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding DISA and NGA.
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding DISA and NGA.
Date:
September 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding Fast Attack Submarines.
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding Fast Attack Submarines.
Date:
September 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding Fleet Reserve Centers MILCON.
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding Fleet Reserve Centers MILCON.
Date:
September 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding MILCON projects programmed for NAS New London.
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding MILCON projects programmed for NAS New London.
Date:
September 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding Naval Weapons Station Seal Beach.
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding Naval Weapons Station Seal Beach.
Date:
September 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding Naval Weapons Station Seal Beach.
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding Naval Weapons Station Seal Beach.
Date:
September 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding Naval Weapons Station Seal Beach.
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding Naval Weapons Station Seal Beach.
Date:
September 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding new Air Force COBRA runs for Niagara Falls, ARS; Mansfield Lahm; Gen Mitchell; Realign Boise AT AGS and Grand Forks AFB.
Department of Defense Clearinghouse Response: DoD Clearinghouse Response to a letter from the BRAC Commission regarding new Air Force COBRA runs for Niagara Falls, ARS; Mansfield Lahm; Gen Mitchell; Realign Boise AT AGS and Grand Forks AFB.
Date:
September 1, 2005
Creator:
United States. Department of Defense.
Object Type:
Letter
System:
The UNT Digital Library