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The REBUS-MCNP Linkage.
The Reduced Enrichment Research and Test Reactor (RERTR) Program uses the REBUS-PC computer code to provide reactor physics and core design information such as neutron flux distributions in space, energy, and time, and to track isotopic changes in fuel and neutron absorbers with burnup. REBUS-PC models the complete fuel cycle including shuffling capability. REBUS-PC evolved using the neutronic capabilities of multi-group diffusion theory code DIF3D 9.0, but was extended to apply the continuous energy Monte Carlo code MCNP for one-group fluxes and cross-sections. The linkage between REBUS-PC and MCNP has recently been modernized and extended, as described in this manual. REBUS-PC now calls MCNP via a system call so that the user can apply any valid MCNP executable. The interface between REBUS-PC and MCNP requires minimal changes to an existing MCNP model, and little additional input. The REBUS-MCNP interface can also be used in conjunction with DIF3D neutronics to update an MCNP model with fuel compositions predicted using a DIF3D based depletion.
Date:
April 24, 2009
Creator:
Stevens, J. G.
Object Type:
Report
System:
The UNT Digital Library
Restructuring of hex-Pt(100) under CO gas environments: formation of 2-D nanoclusters
The atomic-scale restructuring of hex-Pt(100) induced by carbon monoxide with a wide pressure range was studied with a newly designed chamber-in-chamber high-pressure STM and theoretical calculations. Both experimental and DFT calculation results show that CO molecules are bound to Pt nanoclusters through a tilted on-top configuration with a separation of {approx}3.7-4.1 {angstrom}. The phenomenon of restructuring of metal catalyst surfaces induced by adsorption, and in particular the formation of small metallic clusters suggests the importance of studying structures of catalyst surfaces under high pressure conditions for understanding catalytic mechanisms.
Date:
April 24, 2009
Creator:
Tao, Feng; Dag, Sefa; Wang, Lin-Wang; Liu, Zhi; Butcher, Derek; Salmeron, Miquel et al.
Object Type:
Article
System:
The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 94, No. 185, Ed. 1 Friday, April 24, 2009
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 24, 2009
Creator:
Shance, Brenda
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Senior Recital: 2009-04-24 - Sara Staples, mezzo-soprano
Access:
Use of this item is restricted to the UNT Community
A senior recital presented at the UNT College of Music Concert Hall.
Date:
April 24, 2009
Creator:
Staples, Sara
Object Type:
Sound
System:
The UNT Digital Library
Study of metallic materials for solid oxide fuel cell interconnect applications.
Metallic interconnect acts as a gas separator and a gas distributor and therefore, it needs to function adequately in two widely different environments. The interconnect material will be exposed to air on one side and natural gas or coal-derived synthesis gas on the other side. The viable material for the interconnect application must be resistant not only to oxidation but also carburization in hydrocarbon containing low-oxygen environments. In addition, the scales that develop on the exposed surfaces must possess adequate electrical conductivity for them to function as current leads over long service life of the fuel cell. This report addresses five topics of interest for the development of metallic interconnects with adequate performance in fuel cells for long service life. The research conducted over the years and the conclusions reached were used to identify additional areas of research on materials for improved performance of components, especially metallic interconnects, in the complex fuel cell environments. This report details research conducted in the following areas: measurement of area specific electrical resistivity, corrosion performance in dual gas environments by experiments using alloy 446, long term corrosion performance of ferritic and austenitic alloys in hydrogen and methane-reformed synthesis fuel-gas environments, approaches to reduce the …
Date:
April 24, 2009
Creator:
Natesan, K. & Zeng, Z.
Object Type:
Report
System:
The UNT Digital Library
Sweetwater Reporter (Sweetwater, Tex.), Vol. 111, No. 136, Ed. 1 Friday, April 24, 2009
Daily newspaper from Sweetwater, Texas that includes local, state, and national news along with advertising.
Date:
April 24, 2009
Creator:
Rodriguez, Tatiana
Object Type:
Newspaper
System:
The Portal to Texas History
Texas Register, Volume 34, Number 17, Pages 2569-2634, April 24, 2009
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
April 24, 2009
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
U.S.-Funded Assistance Programs in China
This report explores the United States' relationship with the People's Republic of China (PRC) in the context of law and civil society programs that promote democratic change in China, discussions of human rights, and public diplomacy programs. This report explores in particular the economics of said relationship, including U.S.-funded programs to promote democratic-leaning policy changes. This report also discusses the opinions of analysts and other experts who both defend and oppose such efforts.
Date:
April 24, 2009
Creator:
Lum, Thomas
Object Type:
Report
System:
The UNT Digital Library
U.S.-Iraw Withdrawal/Status of Forces Agreement: Issues for Congressional Oversight
This report begins by discussing the historical legal framework governing U.S. military operations in Iraq. The report then provides a general background as to the contents of agreements traditionally considered Status of Forces Agreements (SOFAs). Finally, the report discusses specific aspects of the SOFA, highlighting issues that may require continued congressional oversight.
Date:
April 24, 2009
Creator:
Mason, R. Chuck
Object Type:
Report
System:
The UNT Digital Library
Wind-To-Hydrogen Energy Pilot Project
WIND-TO-HYDROGEN ENERGY PILOT PROJECT: BASIN ELECTRIC POWER COOPERATIVE In an effort to address the hurdles of wind-generated electricity (specifically wind's intermittency and transmission capacity limitations) and support development of electrolysis technology, Basin Electric Power Cooperative (BEPC) conducted a research project involving a wind-to-hydrogen system. Through this effort, BEPC, with the support of the Energy & Environmental Research Center at the University of North Dakota, evaluated the feasibility of dynamically scheduling wind energy to power an electrolysis-based hydrogen production system. The goal of this project was to research the application of hydrogen production from wind energy, allowing for continued wind energy development in remote wind-rich areas and mitigating the necessity for electrical transmission expansion. Prior to expending significant funding on equipment and site development, a feasibility study was performed. The primary objective of the feasibility study was to provide BEPC and The U.S. Department of Energy (DOE) with sufficient information to make a determination whether or not to proceed with Phase II of the project, which was equipment procurement, installation, and operation. Four modes of operation were considered in the feasibility report to evaluate technical and economic merits. Mode 1 - scaled wind, Mode 2 - scaled wind with off-peak, Mode …
Date:
April 24, 2009
Creator:
Rebenitsch, Ron; Bush, Randall; Boushee, Allen; Stevens, Brad G.; Williams, Kirk D.; Woeste, Jeremy et al.
Object Type:
Report
System:
The UNT Digital Library