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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

Defect reaction network in Si-doped InP : numerical predictions.

Description: This Report characterizes the defects in the defect reaction network in silicon-doped, n-type InP deduced from first principles density functional theory. The reaction network is deduced by following exothermic defect reactions starting with the initially mobile interstitial defects reacting with common displacement damage defects in Si-doped InP until culminating in immobile reaction products. The defect reactions and reaction energies are tabulated, along with the properties of all the silico… more
Date: October 1, 2013
Creator: Schultz, Peter Andrew
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Advanced Materials in Support of EERE Needs to Advance Clean Energy Technologies Program Implementation

Description: The goal of this activity was to carry out program implementation and technical projects in support of the ARRA-funded Advanced Materials in Support of EERE Needs to Advance Clean Energy Technologies Program of the DOE Advanced Manufacturing Office (AMO) (formerly the Industrial Technologies Program (ITP)). The work was organized into eight projects in four materials areas: strategic materials, structural materials, energy storage and production materials, and advanced/field/transient processin… more
Date: October 1, 2013
Creator: Liby, Alan L & Rogers, Hiram
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of DC voltage pulses on memristor behavior.

Description: Current knowledge of memristor behavior is limited to a few physical models of which little comprehensive data collection has taken place. The purpose of this research is to collect data in search of exploitable memristor behavior by designing and implementing tests on a HP Labs Rev2 Memristor Test Board. The results are then graphed in their optimal format for conceptualizing behavioral patterns. This series of experiments has concluded the existence of an additional memristor state affecting … more
Date: October 1, 2013
Creator: Evans, Brian R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Site Suitability and Hazard Assessment Guide for Small Modular Reactors

Description: Commercial nuclear reactor projects in the U.S. have traditionally employed large light water reactors (LWR) to generate regional supplies of electricity. Although large LWRs have consistently dominated commercial nuclear markets both domestically and abroad, the concept of small modular reactors (SMRs) capable of producing between 30 MW(t) and 900 MW(t) to generating steam for electricity is not new. Nor is the idea of locating small nuclear reactors in close proximity to and in physical conne… more
Date: October 1, 2013
Creator: Moe, Wayne
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: Annapolis, Maryland. Building America Case Study: Whole-House Solutions for Existing Homes (Fact Sheet)

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: October 1, 2013
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Timing is everything : along the fossil fuel transition pathway.

Description: People save for retirement throughout their career because it is virtually impossible to save all you'll need in retirement the year before you retire. Similarly, without installing incremental amounts of clean fossil, renewable or transformative energy technologies throughout the coming decades, a radical and immediate change will be near impossible the year before a policy goal is set to be in place. Therefore, our research question is,<U+2018>To meet our desired technical and policy goals, w… more
Date: October 1, 2013
Creator: Kobos, Peter Holmes; Walker, La Tonya Nicole & Malczynski, Leonard A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

First Determination of the Weak Charge of the Proton

Description: The Qweak experiment has measured the parity-violating asymmetry in polarized e-p elastic scattering at Q^2 = 0.025(GeV/c)^2, employing 145 microamps of 89% longitudinally polarized electrons on a 34.4cm long liquid hydrogen target at Jefferson Lab. The results of the experiment&#x27;s commissioning run are reported here, constituting approximately 4% of the data collected in the experiment. From these initial results the measured asymmetry is A_e_p = -279 +- 35 (statistics) +- 31 (systematics)… more
Date: October 1, 2013
Creator: Androic, D.; Armstrong, D. S.; Asaturyan, A.; Averett, T.; Balewski, J.; Beaufait, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Dynamic temperature measurements with embedded optical sensors.

Description: This report summarizes LDRD project number 151365, %5CDynamic Temperature Measurements with Embedded Optical Sensors%22. The purpose of this project was to develop an optical sensor capable of detecting modest temperature states (<1000 K) with nanosecond time resolution, a recurring diagnostic need in dynamic compression experiments at the Sandia Z machine. Gold sensors were selected because the visible re ectance spectrum of gold varies strongly with temperature. A variety of static and dynami… more
Date: October 1, 2013
Creator: Dolan, Daniel H.,; Seagle, Christopher T & Ao, Tommy
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Computer–Based Procedures for Nuclear Power Plant Field Workers: Preliminary Results from Two Evaluation Studies

Description: The Idaho National Laboratory and participants from the U.S. nuclear industry are collaborating on a research effort aimed to augment the existing guidance on computer-based procedure (CBP) design with specific guidance on how to design CBP user interfaces such that they support procedure execution in ways that exceed the capabilities of paper-based procedures (PBPs) without introducing new errors. Researchers are employing an iterative process where the human factors issues and interface desig… more
Date: October 1, 2013
Creator: Blanc, Katya L Le & Oxstrand, Johanna H
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Sandia National Laboratories, California proposed CREATE facility environmental baseline survey.

Description: Sandia National Laboratories, Environmental Programs completed an environmental baseline survey (EBS) of 12.6 acres located at Sandia National Laboratories/California (SNL/CA) in support of the proposed Collaboration in Research and Engineering for Advanced Technology and Education (CREATE) Facility. The survey area is comprised of several parcels of land within SNL/CA, County of Alameda, California. The survey area is located within T 3S, R 2E, Section 13. The purpose of this EBS is to documen… more
Date: October 1, 2013
Creator: Catechis, Christopher Spyros
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Impeller deflection and modal finite element analysis.

Description: Deflections of an impeller due to centripetal forces are calculated using finite element analysis. The lateral, or out of plane, deflections are an important design consideration for this particular impeller because it incorporates an air bearing with critical gap tolerances. The target gap distance is approximately 10 microns at a rotational velocity of 2500 rpm. The centripetal forces acting on the impeller cause it deflect in a concave fashion, decreasing the initial gap distance as a functi… more
Date: October 1, 2013
Creator: Spencer, Nathan A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

PVWatts Version 1 Technical Reference

Description: The NREL PVWatts(TM) calculator is a web application developed by the National Renewable Energy Laboratory (NREL) that estimates the electricity production of a grid-connected photovoltaic system based on a few simple inputs. PVWatts combines a number of sub-models to predict overall system performance, and makes several hidden assumptions about performance parameters. This technical reference details the individual sub-models, documents assumptions and hidden parameters, and explains the seque… more
Date: October 1, 2013
Creator: Dobos, A. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optimizing Hydronic System Performance in Residential Applications

Description: Even though new homes constructed with hydronic heat comprise only 3% of the market (US Census Bureau 2009), of the 115 million existing homes in the United States, almost 14 million of those homes (11%) are heated with steam or hot water systems according to 2009 US Census data. Therefore, improvements in hydronic system performance could result in significant energy savings in the US. When operating properly, the combination of a gas-fired condensing boiler with baseboard convectors and an in… more
Date: October 1, 2013
Creator: Arena, L. & Faakye, O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thermochemical plots using JCZS2i piece-wise curve fits.

Description: This report presents plots of specific heat, enthalpy, entropy, and Gibbs free energy for 1439 species in the JCZS2i database. Included in this set of species are 496 condensed-phase species and 943 gas-phase species. The gas phase species contain 80 anions and 112 cations for a total of 192 ions. The JCZS2i database is used in conjunction with the TIGER thermochemical code to predict thermodynamic states from ambient conditions to high temperatures and pressures. Predictions from the TIGER cod… more
Date: October 1, 2013
Creator: Miller, David L.; Schoof, Justin C. & Hobbs, Michael L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Potential use of battery packs from NCAP tested vehicles.

Description: Several large electric vehicle batteries available to the National Highway Traffic Safety Administration are candidates for use in future safety testing programs. The batteries, from vehicles subjected to NCAP crashworthiness testing, are considered potentially damaged due to the nature of testing their associated vehicles have been subjected to. Criteria for safe shipping to Sandia is discussed, as well as condition the batteries must be in to perform testing work. Also discussed are potential… more
Date: October 1, 2013
Creator: Lamb, Joshua & Orendorff, Christopher J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Novel Experiments to Characterize Creep-Fatigue Degradation in VHTR Alloys

Description: It is well known in energy systems that the creep lifetime of high temperature alloys is significantly degraded when a cyclic load is superimposed on components operating in the creep regime. A test method has been developed in an attempt to characterize creep-fatigue behavior of alloys at high temperature. The test imposes a hold time during the tensile phase of a fully reversed strain-controlled low cycle fatigue test. Stress relaxation occurs during the strain-controlled hold period. This ty… more
Date: October 1, 2013
Creator: Wright, J. K.; Simpson, J. A.; Carroll, L. J.; Wright, R. N. & Sham, T.-L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Saving Energy Through Advanced Power Strips (Poster)

Description: Advanced Power Strips (APS) look just like ordinary power strips, except that they have built-in features that are designed to reduce the amount of energy used by many consumer electronics. There are several different types of APSs on the market, but they all operate on the same basic principle of shutting off the supply power to devices that are not in use. By replacing your standard power strip with an APS, you can signifcantly cut the amount of electricity used by your home office and entert… more
Date: October 1, 2013
Creator: Christensen, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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