Serial/Series Title
Fiscal Year 1998
4
ARM Facilities Newsletter
2
Fiscal Year 1997
2
Fiscal Year 2004
2
Natural Gas Monthly
2
Acoustic Detecting and Locating Gas Pipe Line Infringement Quarterly Report
1
Annual Illness and Injury Surveillance Report
1
Application of Reservoir Characterization and Advanced Technology to Improve Recovery and Economics in a Lower Quality Shallow Shelf San Andres Reservoir Progress Report
1
Downhole Power Generation and Wireless Communications for Intelligent Completions Applications, Quarterly Report
1
Federal Emergency Management Information System (FEMIS)
1
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2,843 Matching Results
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ALS user meeting features 10th anniversary celebration
The Advanced Light Source (ALS) saw first light on October 5, 1993, not quite to the day but close to 10 years before the 2003 ALS Users Association meeting, held October 6-8. Fittingly, the proceedings included retrospectives from two of the key players in the early history of the ALS, David Attwood and Jay Marx, and a display of photographs chronicling its construction and commissioning. Science highlights, highlights from young researchers, and posters constituted the meat of the program on Monday and Tuesday morning, while workshops took over Tuesday afternoon and all day Wednesday.
Date:
December 5, 2003
Creator:
Robinson, Art
Object Type:
Article
System:
The UNT Digital Library
Alternative Enhanced Chemical Cleaning Basic Studies Results FY09
This report is about an Alternative Enhanced Chemical Cleaning Basic Studies Results FY09
Date:
May 5, 2010
Creator:
Hay, M. & King, W.
Object Type:
Report
System:
The UNT Digital Library
Alternative Enhanced Chemical Cleaning Basic Studies Results FY09
Due to the need to close waste storage tanks, chemical cleaning methods are needed for the effective removal of the heels. Oxalic acid is the preferred cleaning reagent for sludge heel dissolution, particularly for iron-based sludge, due to the strong complexing strength of the oxalate. However, the large quantity of oxalate added to the tank farm from oxalic acid based chemical cleaning has significant downstream impacts. Optimization of the oxalic acid cleaning process can potentially reduce the downstream impacts from chemical cleaning. To optimize oxalic acid usage, a detailed understanding of the chemistry of oxalic acid based sludge dissolution is required. Additionally, other acid systems may be required for specific waste components with low solubility in oxalic acid and as a means to reduce oxalic acid usage in general. Solubility tests were conducted using non-radioactive, pure metal phases known to be the primary phases present in High Level Waste sludge. The metal phases studied included the aluminum phases gibbsite and boehmite and the iron phases magnetite and hematite. Hematite and boehmite are expected to be the most difficult iron and aluminum phases to dissolve. These mineral phases have been identified in both SRS and Hanford High Level Waste sludge. Acids …
Date:
May 5, 2010
Creator:
Hay, M. & King, W.
Object Type:
Report
System:
The UNT Digital Library
Aluminum--Industry of the Future; Industrial Partnerships: Advancing Energy and Environmental Goals
This tri-fold brochure describe the partnering activities of the Office of Industrial Technologies' (OIT) Industries of the Future (IOF) for Aluminum. Information on what works for the Aluminum industry, examples of successful partnerships, and benefits of partnering with OIT are included.
Date:
February 5, 2001
Creator:
Jones, A.
Object Type:
Book
System:
The UNT Digital Library
Ambient Air Radionuclide Concentrations at and near TA-50 from 2003 through the First Quarter of 2004
The Meteorology and Air Quality (MAQ) group at Los Alamos National Laboratory maintains and operates a large network of environmental air samplers called AIRNET. Some of these samplers are located near Material Disposal Area C at TA-50, a low-level radioactive waste burial site in the semiarid environment of the Pajarito Plateau, near Los Alamos. AIRNET sampling media consist of a filter and silica gel. They are exchanged once every 2 weeks. Presented are 5 months of air sampling results for 5 stations operating in the vicinity of Material Disposal Area C.
Date:
September 5, 2005
Creator:
Jacobson, Keith W. & Eberhart, Craig F.
Object Type:
Report
System:
The UNT Digital Library
Ambient Radon-222 Monitoring in Amargosa Valley, Nevada
As part of a program to characterize and baseline selected environmental parameters in the region around the proposed repository at Yucca Mountain, Nevada, ambient radon-222 monitoring was conducted in the rural community of Amargosa Valley, the community closest to the proposed repository site. Passive integrating radon monitors and a continuous radon monitoring instrument were deployed adjacent to the Community Environmental Monitoring Program (CEMP) (http://www.cemp.dri.edu/index.html) station located in the Amargosa Valley Community Center near the library. The CEMP station provided real-time ambient gamma exposure and meteorological data used to correct the integrated radon measurements as well as verify meteorological data collected by the continuous radon monitoring instrument. Additionally, different types of environmental enclosures that housed the monitors and instrument were used to determine if particular designs influenced the ambient radon measurements.
Date:
June 5, 2008
Creator:
Karr, L. H.; Tappen, J. J.; Shafer, D. & Gray, K. J.
Object Type:
Article
System:
The UNT Digital Library
Ambipolar potential formation in TMX
TMX experimental data on ambipolar potential control and on the accompanying electrostatic confinement are reported. New results on the radial dependence of the central-cell confining potential are given. Radial and axial particle losses as well as scaling of the central-cell axial confinement are discussed.
Date:
May 5, 1981
Creator:
Correl, D. L.; Allen, S. L. & Casper, T. A.
Object Type:
Report
System:
The UNT Digital Library
Ambipolar potential formation in TMX
TMX experimental data on ambipolar potential control and on the accompanying electrostatic confinement are reported. New results on the radial dependence of the central-cell confining potential are given. Radial and axial particle losses as well as scaling of the central-cell axial confinement are discussed.
Date:
May 5, 1981
Creator:
Correll, D. L.; Allen, S. L. & Casper, T. A.
Object Type:
Article
System:
The UNT Digital Library
Anaerobic biprocessing of low rank coals. Final technical report, September 12, 1990--August 10, 1993
Coal solubilization under aerobic conditions results in oxygenated coal product which, in turn, makes the coal poorer fuel than the starting material. A novel approach has been made in this project is to remove oxygen from coal by reductive decarboxylation. In Wyodak subbituminous coal the major oxygen functionality is carboxylic groups which exist predominantly as carboxylate anions strongly chelating metal cations like Ca{sup 2+} and forming strong macromolecular crosslinks which contribute in large measure to network polymer structure. Removal of the carboxylic groups at ambient temperature by anaerobic organisms would unravel the macromoleculer network, resulting in smaller coal macromolecules with increased H/C ratio which has better fuel value and better processing prospects. These studies described here sought to find biological methods to remove carboxylic functionalities from low rank coals under ambient conditions and to assess the properties of these modified coals towards coal liquefaction. Efforts were made to establish anaerobic microbial consortia having decarboxylating ability, decarboxylate coal with the adapted microbial consortia, isolate the organisms, and characterize the biotreated coal products. Production of CO{sup 2} was used as the primary indicator for possible coal decarboxylation.
Date:
August 5, 1993
Creator:
Jain, M. K. & Narayan, R.
Object Type:
Report
System:
The UNT Digital Library
Analysis and Modeling of Laser Ramps and Shocks in Tiitatium and Zirconium With Phase Transitions
None
Date:
August 5, 2011
Creator:
Heuze, O. & Swift, D. C.
Object Type:
Article
System:
The UNT Digital Library
Analysis and Summary Report of Historical Dry Well Gamma Logs for the 241-B Tank Farm 200 East
This report provides a summary of the gross gamma ray data for the 241-B Tank Farm and is intended to identify changes in the gamma activity of gamma-emitting radionuclide contaminants around each accessible borehole, and is not intended to provide interpretation of the data relative to vadose zone mechanics. Trends in data, as well as areas where additional information would be helpful in evaluating the unusual nature of some of the data, are discussed.
Date:
June 5, 2000
Creator:
SYDNOR, H.A.
Object Type:
Report
System:
The UNT Digital Library
Analysis and Summary Report of Historical Dry Well Gamma Logs for the 241-T Tank Farm 200 West
This report provides a summary of the gross gamma ray data for the 241-T Tank Farm and is intended to identify changes in the gamma activity of gamma-emitting radionuclide contaminants around each accessible borehole.
Date:
June 5, 2000
Creator:
SYDNOR, H.A.
Object Type:
Report
System:
The UNT Digital Library
Analysis and System Design Framework for Infrared Spatial Heterodyne Spectrometers
The authors present a preliminary analysis and design framework developed for the evaluation and optimization of infrared, Imaging Spatial Heterodyne Spectrometer (SHS) electro-optic systems. Commensurate with conventional interferometric spectrometers, SHS modeling requires an integrated analysis environment for rigorous evaluation of system error propagation due to detection process, detection noise, system motion, retrieval algorithm and calibration algorithm. The analysis tools provide for optimization of critical system parameters and components including : (1) optical aperture, f-number, and spectral transmission, (2) SHS interferometer grating and Littrow parameters, and (3) image plane requirements as well as cold shield, optical filtering, and focal-plane dimensions, pixel dimensions and quantum efficiency, (4) SHS spatial and temporal sampling parameters, and (5) retrieval and calibration algorithm issues.
Date:
April 5, 1999
Creator:
Cooke, Bradly J.; Smith, Barham W.; Laubscher, Bryan E.; Villeneuve, Pierre V. & Briles, Scott D.
Object Type:
Article
System:
The UNT Digital Library
Analysis of a Nuclear Accident: Fission and Activation Product Releases from the Fukushima Daiichi Nuclear Facility as Remote Indicators of Source Identification, Extent of Release, and State of Damaged Spent Nuclear Fuel
Evidence of the release Pu from the Fukushima Daiichi nuclear power station to the local environment and surrounding communities and estimates on fraction of total fuel inventory released
Date:
December 5, 2011
Creator:
Schwantes, Jon M.; Orton, Christopher R. & Clark, Richard A.
Object Type:
Report
System:
The UNT Digital Library
Analysis of advanced conceptual designs for single-family-sized absorption chillers. Semi-annual report
The objective of the research program is to develop and analyze new concepts for absorption cycles to improve the performance or reduce the cost (or both) of a 3-ton absorption chiller that can be used with solar-collected heat. New refrigerant-absorbent pairs, additives to currently used refrigerant-absorbent pairs, and modifications to the cycle are being investigated. For the initial analyses the use of a fluid at 160 to 230/sup 0/F from a solar collector as a heating source is assumed. In the initial analyses the chiller is to provide chilled water at 45/sup 0/F at full load; alternatively, if a new refrigerant-absorbent pair appears to be amenable for direct cooling of the occupied space, the temperature of the evaporator is to be 45/sup 0/F. Both water cooling and air cooling of the absorber and the condenser are being studied. The use of ambient air at 95/sup 0/F dry bulb and 75/sup 0/F wet bulb temperatures is assumed. With the water-cooled cycles, the initial and operating costs of a properly sized cooling tower will be included. The research consists of five principal tasks: (a) acquisition of information for analysis, (b) definition of criteria for selection of promising refrigerant-absorbent pairs, additives for currently …
Date:
April 5, 1978
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Analysis of Constrained Optimization Variants of the Map-Seeking Circuit Algorithm
The map-seeking circuit algorithm (MSC) was developed by Arathorn to efficiently solve the combinatorial problem of correspondence maximization, which arises in applications like computer vision, motion estimation, image matching, and automatic speech recognition [D. W. Arathorn, Map-Seeking Circuits in Visual Cognition: A Computational Mechanism for Biological and Machine Vision, Stanford University Press, 2002]. Given an input image, a template image, and a discrete set of transformations, the goal is to find a composition of transformations which gives the best fit between the transformed input and the template. We imbed the associated combinatorial search problem within a continuous framework by using superposition, and we analyze a resulting constrained optimization problem. We present several numerical schemes to compute local solutions, and we compare their performance on a pair of test problems: an image matching problem and the challenging problem of automatically solving a Rubik's cube.
Date:
September 5, 2005
Creator:
Harker, S.R.; Vogel, C.R. & Gedeon, T.
Object Type:
Report
System:
The UNT Digital Library
Analysis of Deformation Twinning in Tantalum Single Crystals Under Shock Loading Conditions
None
Date:
December 5, 2012
Creator:
Florando, J. N.; Barton, N. R.; El-Dasher, B.; McNaney, J. M. & Kumar, M.
Object Type:
Article
System:
The UNT Digital Library
Analysis of Dry Storage Temperature Limits for Zircaloy-Clad Spent Nuclear Fuel
Safe interim dry storage of spent nuclear fuel (SNF) must be maintained for a minimum of twenty years according to the Code of Federal Regulations. The most important variable that must be regulated by dry storage licensees in order to meet current safety standards is the temperature of the SNF. The two currently accepted models to define the maximum allowable initial storage temperature for SNF are based on the diffusion controlled cavity growth (DCCG) failure mechanism proposed by Raj and Ashby. These models may not give conservative temperature limits. Some have suggested using a strain-based failure model to predict the maximum allowable temperatures, but we have shown that this is not applicable to the SNF as long as DCCG is the assumed failure mechanism. Although the two accepted models are based on the same fundamental failure theory (DCCG), the researchers who developed the models made different assumptions, including selection of some of the most critical variables in the DCCG failure equation. These inconsistencies are discussed together with recommended modifications to the failure models based on more recent data.
Date:
November 5, 1999
Creator:
Hayes, T.A.; Kassner, M.D. & Vecchio, K.S.
Object Type:
Article
System:
The UNT Digital Library
Analysis of Electron Cloud at Rhic.
Pressure rises with high intense beams are among the main luminosity limitations at RHIC. Observations during the latest runs show beam induced electron multipacting as one of the causes for these pressure rises. Experimental studies are carried out at RHIC using devoted instrumentation to understand the mechanism leading to electron clouds. In the following, we report the experimental electron cloud data and the analyzed results using computer simulation codes.
Date:
July 5, 2004
Creator:
Iriso, U.; Blaskiewicz, M.; Cameron, P.; Drees, A.; Fischer, W. & Al., Et
Object Type:
Article
System:
The UNT Digital Library
Analysis of Enriched Uranium and Weapons Plutonium Reloads for PWRs Using BRACC
Comparisons of the multicycle results demonstrate that the correlation coefficients based on the CASMO3 data were implemented correctly and that the Linear Reactivity Model is acceptably accurate for missed reloads containing both uranium and weapons plutonium fuel. The expanded set of correlation coefficients make BRACC a useful tool for performing multi-cycle in-core fuel management studies of PWR cores containing weapons plutonium.
Date:
June 5, 1997
Creator:
Alonso, G. & Parish, T. A.
Object Type:
Article
System:
The UNT Digital Library
Analysis of Geomechanical Behavior for the Drift Scale Test
The Drift Scale Test (DST) now underway at Yucca Mountain has been simulated using a Drift Scale Distinct Element (DSDE) model. Simulated deformations show good agreement with field deformation measurements. Results indicate most fracture deformation is located above the crown of the Heated Drift. This work is part of the model validation effort for the DSDE model, which is used to assess thermal-mechanical effects on the hydrology of the rock mass surrounding a potential repository.
Date:
March 5, 2001
Creator:
Blair, S.C.; Carlson, S.R. & Wagoner, J.L.
Object Type:
Article
System:
The UNT Digital Library
Analysis of Geomechanical Behavior for the Drift Scale Test
The Drift Scale Test (DST) now underway at Yucca Mountain has been simulated using a Drift Scale Distinct Element (DSDE) model. Simulated deformations show good agreement with field deformation measurements. Results indicate most fracture deformation is located above the crown of the Heated Drift. This work is part of the model validation effort for the DSDE model, which is used to assess thermal-mechanical effects on the hydrology of the rock mass surrounding a potential repository.
Date:
March 5, 2001
Creator:
Blair, S. C.; Carlson, S. R. & Wagoner, J. L.
Object Type:
Article
System:
The UNT Digital Library
Analysis of Ground-Water Levels and Associated Trends in Yucca Flat, Nevada Test Site, Nye County, Nevada, 1951-2003
Almost 4,000 water-level measurements in 216 wells in the Yucca Flat area from 1951 to 2003 were quality assured and analyzed. An interpretative database was developed that describes water-level conditions for each water level measured in Yucca Flat. Multiple attributes were assigned to each water-level measurement in the database to describe the hydrologic conditions at the time of measurement. General quality, temporal variability, regional significance, and hydrologic conditions are attributed for each water-level measurement. The database also includes narratives that discuss the water-level history of each well. Water levels in 34 wells were analyzed for variability and for statistically significant trends. An attempt was made to identify the cause of many of the water-level fluctuations or trends. Potential causes include equilibration following well construction or development, pumping in the monitoring well, withdrawals from a nearby supply well, recharge from precipitation, earthquakes, underground nuclear tests, land subsidence, barometric pressure, and Earth tides. Some of the naturally occurring fluctuations in water levels may result from variations in recharge. The magnitude of the overall water-level change for these fluctuations generally is less than 2 feet. Long-term steady-state hydrographs for most of the wells open to carbonate rock have a very similar pattern. Carbonate-rock …
Date:
October 5, 2005
Creator:
Fenelon, J.M.
Object Type:
Report
System:
The UNT Digital Library
Analysis of high resolution scatter images from laser damage experiments performed on KDP
Interest in producing high damage threshold KH{sub 2}PO{sub 4} (KDP) and (D{sub x}H{sub 1-x}){sub 2}PO{sub 4} (KD*P, DKDP) for optical switching and frequency conversion applications is being driven by the system requirements for the National Ignition Facility (NIF) at Lawrence Livermore National Lab (LLNL). Historically, the path to achieving higher damage thresholds has been to improve the purity of crystal growth solutions. Application of advanced filtration technology has increased the damage threshold, but gives little insight into the actual mechanisms of laser damage. We have developed a laser scatter diagnostic to better study bulk defects and laser damage mechanisms in KDP and KD*P crystals. This diagnostic consists of a cavity doubled, kilohertz class, Nd:YLF laser (527 nm) and high dynamic range CCD camera which allows imaging of bulk scatter signals. With it, we have performed damage tests at 355 nm on four different {open_quotes}vintages{close_quotes} of KDP crystals, concentrating on crystals produced via fast growth methods. We compare the diagnostic`s resolution to LLNL`s standard damage detection method of 100X darkfield microscopy and discuss its impact on damage threshold determination. We have observed the disappearance of scatter sites upon exposure to subthreshold irradiation. In contrast, we have seen scatterers appear where none …
Date:
January 5, 1996
Creator:
Runkel, M.; Woods, B. & Yan, M.
Object Type:
Article
System:
The UNT Digital Library