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Reactive Behavior of K-Basin Spent Nuclear Fuel
The Hanford Spent Nuclear Fuel Project focuses its efforts on determining how to safely move the degraded N-Reactor spent fuel from water-stored basins to a dry storage facility. Based on the laboratory data, the project chose to use a conservative enhancement factor in analyzing the oxidation behavior of the spent metallic fuel. However, there is a need for the project to increase the fuel throughput for the drying treatment process by implementing certain design optimization steps. The study discussed in this paper re-evaluated the previous laboratory data in conjunction with the cold vacuum drying (CVD) process experience and determined whether the built-in level of conservatism could accommodate the potential changes in the process without compromising public and worker safety. An established oxidation reaction-rate constant was used to accurately determine the reactive surface areas of corroded N-Reactor fuel elements. The surface areas calculated for 6 different N-Reactor elements that were stored in the K-West Basin and shipped to Pacific Northwest National Laboratory for drying studies ranges from as low as 0.0018 m2 for a broken element to 8.1 m2 for a highly corroded SNF element 5744U. The SNF element 0309M that was a clean broken piece was used to calibrate the …
Date:
September 30, 2002
Creator:
Abrefah, John; Siciliano, Edward R.; Damschen, Dennis W. & Schlahta, Stephan N.
Object Type:
Report
System:
The UNT Digital Library
Longevity of duct tape in residential air distribution systems: 1-D, 2-D, and 3-D joints
The aging tests conducted so far showed that duct tape tends to degrade in its performance as the joint it is applied to requires a geometrical description of a higher number of space dimensions (1-D, 2-D, 3-D). One-dimensional joints are the easiest to seal with duct tape, and thus the least to experience failure. Two-dimensional joints, such as the flexible duct core-to-collar joints tested in this study, are less likely to fail than three-dimensional collar-to-plenum joints, as the shrinkage could have a positive effect in tightening the joint. Three-dimensional joints are the toughest to seal and the most likely to experience failure. The 2-D flexible duct core-to-collar joints passed the six-month period of the aging test in terms of leakage, but with the exception of the foil-butyl tape, showed degradation in terms hardening, brittleness, partial peeling, shrinkage, wrinkling, delamination of the tape layers, flaking, cracking, bubbling, oozing and discoloration. The baking test results showed that the failure in the duct tape joints could be attributed to the type of combination of the duct tape and the material it is applied to, as the duct tape behaves differently with different substrates. Overall, the foil-butyl tape (Tape 4) had the best results, …
Date:
May 30, 2002
Creator:
Abushakra, Bass
Object Type:
Report
System:
The UNT Digital Library
University Press (Beaumont, Tex.), Vol. 79, No. 14, Ed. 1 Wednesday, October 30, 2002
Semiweekly newspaper from Lamar University in Beaumont, Texas that includes local, national, and campus news along with advertising.
Date:
October 30, 2002
Creator:
Achilles, Jenny
Object Type:
Newspaper
System:
The Portal to Texas History
Final report: U.S. competitive position in automotive technologies
Patent data are presented and analyzed to assess the U.S. competitive position in eleven advanced automotive technology categories, including automotive fuel cells, hydrogen storage, advanced batteries, hybrid electric vehicles and others. Inventive activity in most of the technologies is found to be growing at a rapid pace, particularly in advanced batteries, automotive fuel cells and ultracapacitors. The U.S. is the clear leader in automotive fuel cells, on-board hydrogen storage and light weight materials. Japan leads in advanced batteries, hybrid electric vehicles, ultracapacitors, and appears to be close to overtaking the U.S. in other areas of power electronics.
Date:
September 30, 2002
Creator:
Albert, Michael B.; Cheney, Margaret; Thomas, Patrick & Kroll, Peter
Object Type:
Report
System:
The UNT Digital Library
Comparison of STIS and SNAP spectrograph throughputs
This is a comparison of the measured throughput of STIS on HST versus what we might expect from the spectrograph on SNAP. The principle reference is Woodgate et al. (1998) PASP, 110, 1183. Additional material was taken from the STIS Handbook, available on-line at www.stsci.edu. The goal is to demonstrate that there are sound reasons to expect better performance for a SNAP spectrograph (even one with a grating) than would be expected by scaling from HST+STIS.
Date:
June 30, 2002
Creator:
Aldering, Greg
Object Type:
Report
System:
The UNT Digital Library
Reactive Multiphase behavior of CO2 in Saline Aquifers beneath the Colorado Plateau
Gas reservoirs developed within the Colorado Plateau and Southern Rocky Mountains region are natural laboratories for studying the factors that promote long-term storage of CO{sub 2}. They also provide sites for storing additional CO{sub 2} if it can be separated from the flue gases of coal-fired power plants in this part of the U.S.A. These natural reservoirs are developed primarily in sandstones and dolomites; shales, mudstones and anhydrite form seals. In many fields, stacked reservoirs are present, indicating that the gas has migrated up through the section. There are also geologically young travertine deposits at the surface, and CO{sub 2}-charged groundwater and springs in the vicinity of known CO{sub 2} occurrences. These near-surface geological and hydrological features also provide examples of the environmental effects of leakage of CO{sub 2} from reservoirs, and justify further study. During reporting period covered here (the second quarter of Year 2 of the project, i.e. January 1-March 31, 2002), the main achievements were: (1) Field trips to the central Utah and eastern Arizona travertine areas to collect data and water samples to support study of surface CO{sub 2}-rich fluid leakage in these two areas. (2) Partial completion of a manuscript on natural analogues CO{sub 2} …
Date:
June 30, 2002
Creator:
Allis, R. G.; Moore, J. & White, S.
Object Type:
Report
System:
The UNT Digital Library
INTEGRATED SYSTEM TO CONTROL PRIMARY PM 2.5 FROM ELECTRIC POWER PLANTS
The performance tests at E.C. Gaston showed how the Advanced ElectroCore field prototype performance changed as a function of the gas flow, inlet loading and the voltage applied to the central electrode in the separator. With the optimum voltage applied to the electrode, the unit achieved a maximum efficiency of 96.38 percent and a minimum outlet loading of 0.0021 grains/dscf while operating with a specific separating area (SSA) of 100 square feet per thousand acfm. The minimum outlet loading translates to about 0.00575 lb{sub m}/million Btu or less than one fifth of the current NSPS standard of 0.03 lb{sub m}/million Btu. The highest efficiency for the upstream ESP was about 99.75 percent. Together these two systems are capable of removing 99.991 percent of the particulate matter coming from the uncontrolled boiler. This efficiency is higher than the target efficiency of 99.99 percent and the outlet loading of 0.00575 lb{sub m}/million Btu is almost half of the target emission rate of 0.01 lb{sub m}/million stated in the program objectives. In terms of efficiency and outlet concentration, the tests showed that the Advanced ElectroCore can meet or exceed the program goals. The mercury capture tests were conducted using the Ontario Hydro method. …
Date:
June 30, 2002
Creator:
Altman, Ralph
Object Type:
Report
System:
The UNT Digital Library
Selected Privileges and Courtesies Extended to Former Senators
None
Date:
October 30, 2002
Creator:
Amer, Mildred L.
Object Type:
Report
System:
The UNT Digital Library
Cathodic arc plasma deposition
None
Date:
May 30, 2002
Creator:
Anders, Andre
Object Type:
Article
System:
The UNT Digital Library
Armadillo
Photograph of a Armadillo, in the Wichita Wildlife Refuge.
Date:
September 30, 2002
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Buffalo
Photograph of Buffalo, in the Wichita Wildlife Refuge.
Date:
September 30, 2002
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Buffalo
Photograph of Buffalo, in the Wichita Wildlife Refuge.
Date:
September 30, 2002
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Buffalo
Photograph of Buffalo, in the Wichita Wildlife Refuge.
Date:
September 30, 2002
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Buffalo
Photograph of Buffalo, in the Wichita Wildlife Refuge.
Date:
September 30, 2002
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Buffalo
Photograph of Buffalo, in the Wichita Wildlife Refuge.
Date:
September 30, 2002
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Buffalo
Photograph of Buffalo, in the Wichita Wildlife Refuge.
Date:
September 30, 2002
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Buffalo
Photograph of Buffalo, in the Wichita Wildlife Refuge.
Date:
September 30, 2002
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Buffalo
Photograph of Buffalo, in the Wichita Wildlife Refuge.
Date:
September 30, 2002
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Buffalo
Photograph of Buffalo, in the Wichita Wildlife Refuge.
Date:
September 30, 2002
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Buffalo
Photograph of Buffalo, in the Wichita Wildlife Refuge.
Date:
September 30, 2002
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Buffalo
Photograph of Buffalo, in the Wichita Wildlife Refuge.
Date:
September 30, 2002
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Buffalo
Photograph of Buffalo, in the Wichita Wildlife Refuge.
Date:
September 30, 2002
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Buffalo
Photograph of Buffalo, in the Wichita Wildlife Refuge.
Date:
September 30, 2002
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Buffalo
Photograph of Buffalo, in the Wichita Wildlife Refuge.
Date:
September 30, 2002
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History