Partner
UNT Libraries Government Documents Department
26,810
UNT Libraries Special Collections
1,759
Oklahoma Historical Society
937
Texas Historical Commission
606
UNT Libraries
379
UNT College of Information
308
National Museum of the Pacific War/Admiral Nimitz Foundation
171
Sterling Municipal Library
116
Oklahoma State Firefighters Museum
100
UNT Music Library
57
99 More
Collection
Office of Scientific & Technical Information Technical Reports
24,856
Texas Digital Newspaper Program
1,320
The Black Academy of Arts and Letters Records
1,131
Congressional Research Service Reports
769
Oklahoma Digital Newspaper Program
698
THC National Register Collection
597
Defense Base Closure and Realignment Commission
579
Tocker Foundation Grant
538
Government Accountability Office Reports
442
Jim Argo Collection
410
178 More
Degree Department
Degree Discipline
Degree Level
Country
States
Decade
Year
Month
Day
Results:
1 - 24 of
32,451
next
Performance Demonstration Program Plan for Nondestructive Assay of Drummed Wastes for the TRU Waste Characterization Program
Each testing and analytical facility performing waste characterization activities for the Waste Isolation Pilot Plant (WIPP) participates in the Performance Demonstration Program (PDP) to comply with the Transuranic Waste Acceptance Criteria for the Waste Isolation Pilot Plant (WAC) (DOE/WIPP-02-3122) and the Quality Assurance Program Document (QAPD) (CBFO-94-1012). The PDP serves as a quality control check for data generated in the characterization of waste destined for WIPP. Single blind audit samples are prepared and distributed to each of the facilities participating in the PDP. The PDP evaluates analyses of simulated headspace gases, constituents of the Resource Conservation and Recovery Act (RCRA), and transuranic (TRU) radionuclides using nondestructive assay (NDA) techniques.
Date:
April 1, 2009
Creator:
/A, N
Object Type:
Report
System:
The UNT Digital Library
Overview of Low-Level Waste Disposal Operations at the Nevada Test Site
The U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office Environmental Management Program is charged with the responsibility to carry out the disposal of on-site and off-site generated low-level radioactive waste at the Nevada Test Site. Core elements of this mission are ensuring that disposal take place in a manner that is safe and cost-effective while protecting workers, the public, and the environment. This paper focuses on giving an overview of the Nevada Test Site facilities regarding currant design of disposal. In addition, technical attributes of the facilities established through the site characterization process will be further described. An update on current waste disposal volumes and capabilities will also be provided. This discussion leads to anticipated volume projections and disposal site requirements as the Nevada Test Site disposal operations look towards the future.
Date:
February 1, 2007
Creator:
/Navarro, DOE
Object Type:
Article
System:
The UNT Digital Library
The Changing Adventures of Mixed Low-Level Waste Disposal at the Nevada Test Site
After a 15-year hiatus, the United States Department of Energy (DOE) National Nuclear Security Administration Nevada Site Office (NNSA/NSO) began accepting DOE off-site generated mixed low-level radioactive waste (MLLW) for disposal at the Nevada Test Site (NTS) in December 2005. This action was predicated on the acceptance by the Nevada Division of Environmental Protection (NDEP) of a waste analysis plan (WAP). The NNSA/NSO agreed to limit mixed waste disposal to 20,000 cubic meters (approximately 706,000 cubic feet) and close the facility by December 2010 or sooner, if the volume limit is reached. The WAP and implementing procedures were developed based on Hanford’s system of verification to the extent possible so the two regional disposal sites could have similar processes. Since the NNSA/NSO does not have a breaching facility to allow the opening of boxes at the site, verification of the waste occurs by visual inspection at the generator/treatment facility or by Real-Time-Radiography (RTR) at the NTS. This system allows the NTS to effectively, efficiently, and compliantly accept MLLW for disposal. The WAP, NTS Waste Acceptance Criteria, and procedures have been revised based on learning experiences. These changes include: RTR expectations; visual inspection techniques; tamper-indicating device selection; void space requirements; and …
Date:
February 1, 2007
Creator:
/Navarro/NSTec, DOE
Object Type:
Article
System:
The UNT Digital Library
Scaled Experimental Modeling of VHTR Plenum Flows
Abstract The Very High Temperature Reactor (VHTR) is the leading candidate for the Next Generation Nuclear Power (NGNP) Project in the U.S. which has the goal of demonstrating the production of emissions free electricity and hydrogen by 2015. Various scaled heated gas and water flow facilities were investigated for modeling VHTR upper and lower plenum flows during the decay heat portion of a pressurized conduction-cooldown scenario and for modeling thermal mixing and stratification (“thermal striping”) in the lower plenum during normal operation. It was concluded, based on phenomena scaling and instrumentation and other practical considerations, that a heated water flow scale model facility is preferable to a heated gas flow facility and to unheated facilities which use fluids with ranges of density to simulate the density effect of heating. For a heated water flow lower plenum model, both the Richardson numbers and Reynolds numbers may be approximately matched for conduction-cooldown natural circulation conditions. Thermal mixing during normal operation may be simulated but at lower, but still fully turbulent, Reynolds numbers than in the prototype. Natural circulation flows in the upper plenum may also be simulated in a separate heated water flow facility that uses the same plumbing as the lower …
Date:
April 1, 2007
Creator:
15, ICONE
Object Type:
Article
System:
The UNT Digital Library
IN-VIVO DIAGNOSIS OF CHEMICALLY INDUCED MELANOMA IN AN ANIMAL MODEL USING UV-VISIBLE AND NIR ELASTIC SCATTERING SPECTROSCOPY: PRELIMINARY TESTING.
Elastic light scattering spectroscopy (ESS) has the potential to provide spectra that contain both morphological and chromophore information from tissue. We report on a preliminary study of this technique, with the hope of developing a method for diagnosis of highly-pigmented skin lesions, commonly associated with skin cancer. Four opossums were treated with dimethylbenz(a)anthracene to induce both malignant melanoma and benign pigmented lesions. Skin lesions were examined in vivo using both UV-visible and near infrared (NIR) ESS, with wavelength ranges of 330-900 nm and 900-1700 nm, respectively. Both portable systems used identical fiber-optic probe geometry throughout all of the measurements. The core diameters for illuminating and collecting fibers were 400 and 200 {micro}m, respectively, with center-to-center separation of 350 {micro}m. The probe was placed in optical contact with the tissue under investigation. Biopsies from lesions were analyzed by two standard histopathological procedures. Taking into account only the biopsied lesions, UV-visible ESS showed distinct spectral correlation for 11/13 lesions. The NIR-ESS correlated well with 12/13 lesions correctly. The results of these experiments showed that UV-visible and NIR-ESS have the potential to classify benign and malignant skin lesions, with encouraging agreement to that provided by standard histopathological examination. These initial results show potential …
Date:
January 1, 2001
Creator:
A'AMAR, C.; LEY, R. & AL, ET
Object Type:
Article
System:
The UNT Digital Library
Development of Advanced Wear and Corrosion Resistant Systems Through Laser Surface Alloying and Materials Processing
The stability of tungsten carbide particles in iron-rich and nickel-rich liquid during the laser surface alloying (LSA) process was investigated. Kinetic calculations indicate a rapid dissolution of tungsten carbide particles in iron-rich liquid, as compared with the dissolution rate in nickel-rich liquid. Optical microscopy indicated a heterogeneous microstructure around the tungsten particles that is in agreement with concentration gradients predicted by kinetic calculation. The work demonstrates the applicability of computational thermodynamics and kinetic models for the LSA process.
Date:
April 1, 2002
Creator:
A, Babu S S Martukanitz R P Parks K D David S
Object Type:
Article
System:
The UNT Digital Library
Buffer Chemical Polishing and RF Testing of the 56 MHz SRF Cavity
N/A
Date:
January 1, 2009
Creator:
A., Burrill
Object Type:
Report
System:
The UNT Digital Library
IBS and Expected Luminosity Performance For RHIC Beams At Top Energy With 56 MHz SRF Cavity
N/A
Date:
October 1, 2008
Creator:
A., Fedotov
Object Type:
Report
System:
The UNT Digital Library
IBS and Potential Luminosity Improvement for RHIC Operation Below Transition Energy
N/A
Date:
January 1, 2009
Creator:
A., Fedotov
Object Type:
Report
System:
The UNT Digital Library
RHIC Performance with 56 MHz RF and Gold Ion Beams Pre-cooled at Lower Energy
N/A
Date:
October 1, 2008
Creator:
A., Fedotov
Object Type:
Report
System:
The UNT Digital Library
Emittance Reduction between EBIS LINAC and Booster by Electron Beam Cooling - Is Single Pass Cooling Possible?
N/A
Date:
April 1, 2008
Creator:
A., Hershcovitch
Object Type:
Report
System:
The UNT Digital Library
Issues Concerning High Current Low Energy Electron Beams Required for Ion Cooling between EBIS LINAC and Booster
N/A
Date:
March 1, 2009
Creator:
A., Hershcovitch
Object Type:
Report
System:
The UNT Digital Library
Novel Source Ionizer Options for Polarized Ions
N/A
Date:
September 1, 2000
Creator:
A., Hershcovitch
Object Type:
Report
System:
The UNT Digital Library
Parallel Ion Energy Spread Due to Interaction With an Electron Bunch in the RHIC Electron Beam Cooling Solenoid
N/A
Date:
June 1, 2003
Creator:
A., Hershcovitch
Object Type:
Report
System:
The UNT Digital Library
Part II/Addendum Electron Beam Cooling between EBIS LINAC and Booster; Is Single Pass Cooling Possible?
N/A
Date:
July 1, 2008
Creator:
A., Hershcovitch
Object Type:
Report
System:
The UNT Digital Library
Plasma Lens for Super Neutrino Beam at BNL and Other Applications
N/A
Date:
November 1, 2005
Creator:
A., Hershcovitch
Object Type:
Report
System:
The UNT Digital Library
Plasma Micro-Stability Analysis for the RHIC Electron Beam Cooler
N/A
Date:
January 1, 2004
Creator:
A., Hershcovitch
Object Type:
Report
System:
The UNT Digital Library
Polarized proton beam acceleration with a single Siberian Snake in each RHIC ring
N/A
Date:
March 1, 2000
Creator:
A., Lehrach; Luccio, A. U. & Roser, T.
Object Type:
Report
System:
The UNT Digital Library
Electron Gun for RHIC EBIS
N/A
Date:
July 1, 2006
Creator:
A., Pikin
Object Type:
Report
System:
The UNT Digital Library
Optical simulations of the ion beam emittance growth in different types of a gridded lens
N/A
Date:
April 1, 2007
Creator:
A., Pikin
Object Type:
Report
System:
The UNT Digital Library
Spherical Aberration Corrections for an Electrostatic Gridded Lens
N/A
Date:
May 1, 2008
Creator:
A., Pikin
Object Type:
Report
System:
The UNT Digital Library
Optical, Thermal and Stress Simulations of a 300-kwatt Electron Collector
N/A
Date:
July 1, 2006
Creator:
A., Pikin; Kponou, A. & Snydstrup, L.
Object Type:
Report
System:
The UNT Digital Library
Cancellation of the Chromatic Effects with proper Field Profile
N/A
Date:
April 1, 2004
Creator:
A., Ruggiero
Object Type:
Report
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