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Neutron Damage in Mechanically-Cooled High-Purity Germanium Detectors for Field-Portable Prompt Gamma Neutron Activation Analysis (PGNAA) Systems

Description: Prompt Gamma Neutron Activation (PGNAA) systems require the use of a gamma-ray spectrometer to record the gamma-ray spectrum of an object under test and allow the determination of the object’s composition. Field-portable systems, such as Idaho National Laboratory’s PINS system, have used standard liquid-nitrogen-cooled high-purity germanium (HPGe) detectors to perform this function. These detectors have performed very well in the past, but the requirement of liquid-nitrogen cooling limits their… more
Date: October 1, 2013
Creator: Seabury, E. H.; Wharton, C. J.; Caffrey, A. J.; McCabe, J. B. & Van Siclen, C. Dew.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The oxidation of aluminum at high temperature studied by Thermogravimetric Analysis and Differential Scanning Calorimetry.

Description: The oxidation in air of high-purity Al foil was studied as a function of temperature using Thermogravimetric Analysis with Differential Scanning Calorimetry (TGA/DSC). The rate and/or extent of oxidation was found to be a non-linear function of the temperature. Between 650 and 750 %C2%B0C very little oxidation took place; at 850 %C2%B0C oxidation occurred after an induction period, while at 950 %C2%B0C oxidation occurred without an induction period. At oxidation temperatures between 1050 and 11… more
Date: October 1, 2013
Creator: Coker, Eric Nicholas
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation and Testing of the ADVANTG Code on SNM Detection

Description: Pacific Northwest National Laboratory (PNNL) has been tasked with evaluating the effectiveness of ORNL’s new hybrid transport code, ADVANTG, on scenarios of interest to our NA-22 sponsor, specifically of detection of diversion of special nuclear material (SNM). PNNL staff have determined that acquisition and installation of ADVANTG was relatively straightforward for a code in its phase of development, but probably not yet sufficient for mass distribution to the general user. PNNL staff also det… more
Date: September 24, 2013
Creator: Shaver, Mark W.; Casella, Andrew M.; Wittman, Richard S. & Hayes, John W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Executive Summary - Natural Gas and the Transformation of the U.S. Energy Sector: Electricity

Description: In November 2012, the Joint Institute for Strategic Energy Analysis (JISEA) released a new report, 'Natural Gas and the Transformation of the U.S. Energy Sector: Electricity.' The study provides a new methodological approach to estimate natural gas related greenhouse gas (GHG) emissions, tracks trends in regulatory and voluntary industry practices, and explores various electricity futures. The Executive Summary provides key findings, insights, data, and figures from this major study.
Date: January 1, 2013
Creator: Logan, J.; Heath, G.; Macknick, J.; Paranhos, E.; Boyd, W. & Carlson, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

REMOVAL OF LEGACY PLUTONIUM MATERIALS FROM SWEDEN

Description: U.S. Department of Energy’s National Nuclear Security Administration (NNSA) Office of Global Threat Reduction (GTRI) recently removed legacy plutonium materials from Sweden in collaboration with AB SVAFO, Sweden. This paper details the activities undertaken through the U.S. receiving site (Savannah River Site (SRS)) to support the characterization, stabilization, packaging and removal of legacy plutonium materials from Sweden in 2012. This effort was undertaken as part of GTRI’s Gap Materials P… more
Date: August 18, 2013
Creator: Dunn, Kerry A.; Bellamy, J. Steve; Chandler, Greg T.; Iyer, Natraj C.; Koenig, Rich E.; Leduc, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

NREL Invention Speeds Solar Cell Quality Testing for Industry (Fact Sheet)

Description: A solid-state optical system, invented by the National Renewable Energy Laboratory (NREL), measures solar cell quantum efficiency (QE) in less than a second, enabling a suite of new capabilities for solar cell manufacturers. QE is a measurement of how cells respond to light across the solar spectrum, but traditional methods for measuring QE had been too slow, limiting its application to small samples pulled from the production line and analyzed in laboratories. NREL's technique, commercialized … more
Date: August 1, 2013
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Energy Retrofit Field Study and Best Practices in a Hot-Humid Climate

Description: Energy efficiency improvement as a component of comprehensive renovation was investigated under U.S. Department of Energy (DOE) funding of the Building America Partnership for Improved Residential Construction (BA-PIRC). Researchers at the Florida Solar Energy Center (FSEC) worked with affordable housing partners renovating foreclosed homes built from the 1950's through the 2000's in the hot-humid climate (within the Southern census region), primarily in Florida. Researchers targeted a 30% impr… more
Date: March 1, 2013
Creator: McIvaine, J.; Sutherland, K. & Martin, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Multitasking mesoporous nanomaterials for biorefinery applications

Description: Mesoporous silica nanoparticles (MSNs) have attracted great interest for last two decades due to their unique and advantageous structural properties, such as high surface area, pore volume, stable mesostructure, tunable pore size and controllable particle morphology. The robust silica framework provides sites for organic modifications, making MSNs ideal platforms for adsorbents and supported organocatalysts. In addition, the pores of MSNs provide cavities/ channels for incorporation of metal an… more
Date: May 2, 2013
Creator: Kandel, Kapil
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Study of Heterogeneouse Processes Related to the Chemistry of Tropospheric Oxidants and Aerosols

Description: The objective of the studies was to elucidate the heterogeneous chemistry of tropospheric aerosols. Experiments were designed to measure both specifically needed parameters, and to obtain systematic data required to build a fundamental understanding of the nature of gas-surface physical and chemical interactions
Date: February 13, 2013
Creator: Davidovits, Paul; Worsnop, D R; Jayne, J T & Colb, C E
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Efficient Multifamily Homes in a Hot-Humid Climate by Atlantic Housing Partners

Description: With assistance from the Florida Solar Energy Center (FSEC) and its Building America Partnership for Improved Residential Construction (BA-PIRC), Atlantic Housing Partners (AHP) has implemented a high performance, systems engineered package of measures. This report demonstrates how the initiative achieves Building America (BA) goals of 30%-50% energy savings. Specifically, the goals are documented as being achieved in the new construction multifamily housing sector in the hot humid climate. Res… more
Date: April 1, 2013
Creator: Chasar, D. & Martin, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Addendum to the Closure Report for Corrective Action Unit 547: Miscellaneous Contaminated Waste Sites, Nevada National Security Site, Nevada

Description: This addendum to the Closure Report for Corrective Action Unit 547: Miscellaneous Contaminated Waste Sites, Nevada National Security Site, Nevada, DOE/NV--1480, dated July 2012, documents repairs of erosion and construction of engineered erosion protection features at Corrective Action Site (CAS) 02-37-02 (MULLET) and CAS 09-99-06 (PLAYER). The final as-built drawings are included in Appendix A, and photographs of field work are included in Appendix B. Field work was completed on March 11, 2013. more
Date: July 31, 2013
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Feasibility Study of Economics and Performance of Solar Photovoltaics at the Brisbane Baylands Brownfield Site in Brisbane, California.

Description: The U.S. Environmental Protection Agency (EPA), in accordance with the RE-Powering America's Land initiative, selected the Brisbane Baylands site in Brisbane, California, for a feasibility study of renewable energy production. The National Renewable Energy Laboratory (NREL) provided technical assistance for this project. The purpose of this report is to assess the site for a possible photovoltaic (PV) system installation and estimate the cost, performance, and site impacts of different PV optio… more
Date: April 1, 2013
Creator: Salasovich, J.; Geiger, J.; Healey, V. & Mosey, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Bay Ridge Gardens - Mixed-Humid Affordable Multifamily Housing Deep Energy Retrofit

Description: Under this project, Newport Partners (as part of the BA-PIRC research team) evaluated the installation, measured performance, and cost-effectiveness of efficiency upgrade measures for a tenant-in-place DER at the Bay Ridge multifamily (MF) development in Annapolis, Maryland. The design and construction phase of the Bay Ridge project was completed in August 2012. This report summarizes system commissioning, short-term test results, utility bill data analysis, and analysis of real-time data colle… more
Date: August 1, 2013
Creator: Lyons, J.; Moore, M. & Thompson, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

GPU-optimized Code for Long-term Simulations of Beam-beam Effects in Colliders

Description: We report on the development of the new code for long-term simulation of beam-beam effects in particle colliders. The underlying physical model relies on a matrix-based arbitrary-order symplectic particle tracking for beam transport and the Bassetti-Erskine approximation for beam-beam interaction. The computations are accelerated through a parallel implementation on a hybrid GPU/CPU platform. With the new code, a previously computationally prohibitive long-term simulations become tractable. We … more
Date: June 1, 2013
Creator: Roblin, Yves; Morozov, Vasiliy; Terzic, Balsa; Aturban, Mohamed A.; Ranjan, D. & Zubair, Mohammed
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Retail Buildings: Assessing and Reducing Plug and Process Loads in Retail Buildings (Fact Sheet)

Description: Plug and process loads (PPLs) in commercial buildings account for almost 5% of U.S. primary energy consumption. Minimizing these loads is a primary challenge in the design and operation of an energy-efficient building. PPLs are not related to general lighting, heating, ventilation, cooling, and water heating, and typically do not provide comfort to the occupants. They use an increasingly large fraction of the building energy use pie because the number and variety of electrical devices have incr… more
Date: April 1, 2013
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Tritium Formation and Mitigation in High-Temperature Reactor Systems

Description: Tritium is a radiologically active isotope of hydrogen. It is formed in nuclear reactors by neutron absorption and ternary fission events and can subsequently escape into the environment. To prevent the tritium contamination of proposed reactor buildings and surrounding sites, this study examines the root causes and potential mitigation strategies for permeation of tritium (such as: materials selection, inert gas sparging, etc...). A model is presented that can be used to predict permeation rat… more
Date: March 1, 2013
Creator: Sabharwall, Piyush; Stoots, Carl & Schmutz, Hans A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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