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open access

AN INFORMATION STORAGE AND RETRIEVAL SYSTEM FOR IRRADIATION EFFECTS IN METALS

Description: An information storage and retrieval system (PIC) was developed, utilizing the IBM 7090 computer, for handling data pertaining to the effects of neutron irradiation on metals. The input includes a reference identification, an appropriate abstract or extract summarizing the article, code identification parameters analogous to those used by the ASM-SLA Literature Classification System, and special codes identifying relevant irradiation and testing parameters. The output contains the same data plu… more
Date: August 15, 1963
Creator: Bush, S. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Mechanism Explaining the Instability of EBR-I, Mark III

Description: Presented at the International Atomic Energy Agencysponsored Seminar on the Physics of Fast and Intermediate Reactors. Vienna, August 3-11, 196l. A feedback model, was developed to account for resonant instabilities in the Mark II core. In this model, the prompt positive power coefficient effect is ascribed to fuel rod bowing and the delayed negative power coefficient effect to thermally lnduced motions in the lower shield plate. Since this model is supported by observations, it is concluded th… more
Date: September 1, 1961
Creator: Smith, R. R.; Matlock, R. G.; McGinnis, F. D.; Novick, M. & Thalgott, F. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of the typical meteorological years for solar heating and cooling system studies. Final report

Description: This report is a summary of an evaluation of the weather data set, generated at Sandia Laboratories, known as the Typical Meteorological Year (TMY) Data. The purpose of the evaluation is to determine how well the TMY data represent actual long-term weather data in affecting the performance of solar heating and cooling systems. The two data sets are compared through detailed SHAC simulation.
Date: December 1, 1979
Creator: Freeman, T. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Utilizing Micro-Mechanisms to Extend Fatigue Life in High Temperature Shape Memory Alloys

Description: Shape memory alloys (SMAs) are multifunctional materials with thermoelastic phase transformation behavior capable of recovering the designed geometry after deformation. These alloys can undergo a solid-to-solid phase transformation in response to external stimuli, such as pressure or temperature, to accommodate or alleviate strain. Such a response can be utilized to design solid-state actuators by converting thermal energy into mechanical energy. Interest in these unique alloys is expanding to … more
Date: December 2024
Creator: Gantz, Faith
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
captions transcript

[News Clip: How Hot Is It]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: June 28, 1990, 6:00 p.m.
Duration: 36 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

Chemical Equilibria and Reaction Rates for Hydrofluorination of UO$sub 2$ From "Ammonium Diuranate" and From UO$sub 3$

Description: Reaction rates for the hydrofluorination of UO/sub 2/ derived from two widely different source materials (sulfated pot-denitrated UO/sub 3/ and "ammonium diuranate," (ADU)) were determined in a thermobalance over a wide range of temperatures (460 deg F to 1150 deg F) and with several HF--H/sub 2/O gas phase mixtures varying from 20 to 100 per cent HF. These data were then organized to yield single plots for each type of feed material. From these plots, maximum instantaneous reaction rates may b… more
Date: March 12, 1958
Creator: Briggs, G. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Semi-Empirical Two Step Carbon Corrosion Reaction Model in PEM Fuel Cells

Description: The cathode CL of a polymer electrolyte membrane fuel cell (PEMFC) was exposed to high potentials, 1.0 to 1.4 V versus a reversible hydrogen electrode (RHE), that are typically encountered during start up/shut down operation. While both platinum dissolution and carbon corrosion occurred, the carbon corrosion effects were isolated and modeled. The presented model separates the carbon corrosion process into two reaction steps; (1) oxidation of the carbon surface to carbon-oxygen groups, and (2) f… more
Date: January 1, 2013
Creator: Young, Alan; Colbow, Vesna; Harvey, David; Rogers, Erin & Wessel, Silvia
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

RBU: A Combined Monte Carlo Reactor-Burnup Program for the IBM 709

Description: RBU is a digital computer program for the detailed calculation of the neutron, reactivity, and isotopic history of a reactor in which relatively exact models of the geometry and physical processes are included to permit reliable pre dictions of fuel costs and reactor performance. The program uses the Monte Carlo method to obtain the fine structure of the neutron flux in three space dimensions and energy. Using this fine structure, cross sections are averaged over space and energy to obtain the … more
Date: September 30, 1959
Creator: Leshan, E. J.; Burr, J. R.; Temme, M.; Thompson, G. T. & Triplett, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of Metallic Uranium Fuel Elements of Improved Irradiation Stability. Semiannual Progress Report No. 1

Description: The feasibility of improving swelling resistance in metallic uranium by increasing the dislocation density is under investigation. Increasing the density of dislocations is expected to increase the number of sites at which fission product gas atoms are "pinned," increase the number of gas bubble nuclei, and increase mechanical strength. Dislocations are introduced by a treatment which involves deformation of metastable beta or gamma phase in uranium-rich alloys, followed by transformation. Acti… more
Date: December 14, 1959
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Laboratory-Scale SuperLig 639 Column Tests With Hanford Waste Simulants

Description: This report describes the results of SuperLig{Reg} 639 column tests conducted at the Savannah River Technology Center (SRTC) in support of the Hanford River Protection Project - Waste Treatment Plant (RPP-WTP). The RPP-WTP contract was awarded to Bechtel National Inc. (BNI) for the design, construction, and initial operation of a plant for the treatment and vitrification of millions of gallons of radioactive waste currently stored in tanks at Hanford, WA. Part of the current treatment process i… more
Date: May 16, 2003
Creator: King, William D.; Spencer, William A. & Bussey, Myra Pettis
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Temperature control in a 30 stage, 5-cm Centrifugal Contactor Pilot Plant

Description: Temperature profile testing was performed using a 30 stage 5-cm centrifugal contactor pilot plant. These tests were performed to evaluate the ability to control process temperature by adjusting feed solution temperatures. This would eliminate the need for complex jacketed heat exchanger installation on the centrifugal contactors. Thermocouples were installed on the inlet and outlets of each stage, as well as directly in the mixing zone of several of the contactor stages. Lamp oil, a commerciall… more
Date: September 1, 2009
Creator: Law, Jack D.; Garn, Troy G. & Meikrantz, David H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Geothermal Technologies Program Geoscience and Supporting Technologies 2001 University Research Summaries

Description: The U.S. Department of Energy Office of Wind and Geothermal Technologies (DOE) is funding advanced geothermal research through University Geothermal Research solicitations. These solicitations are intended to generate research proposals in the areas of fracture permeability location and characterization, reservoir management and geochemistry. The work funded through these solicitations should stimulate the development of new geothermal electrical generating capacity through increasing scientifi… more
Date: June 1, 2002
Creator: Creed, Robert John & Laney, Patrick Thomas
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Performance Characteristics of an Extended Throat Flow Nozzle for the Measurement of High Void Fraction Multi-phase Flows

Description: An extended throat flow nozzle has been examined as a device for the measurement of very high void fraction (a ³ 0.95) multi-phase flows. Due to its greater density and partial contact with the wall, the equilibrium velocity of the liquid phase appreciably lags that of the lighter gas phase. The two phases are strongly coupled resulting in pressure drops across the contraction and in the extended throat that are significantly different than those experienced in single-phase flow. Information ab… more
Date: June 1, 1999
Creator: Fincke, James Russell; Jeffery, Charles Lee; Ronnenkamp, C.; Kruse, D.; Krogue, J. & Householder, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Dissolution Studies With Pilot Plant and Actual INTEC Calcines

Description: The dissolution of Idaho Nuclear Technology and Engineering Center (INTEC) pilot plant calcines was examined to determine solubility of calcine matrix components in acidic media. Two representatives pilot plant calcine types were studied: Zirconia calcine and Zirconia/ Sodium calcine. Dissolution of these calcines was evaluated using lower initial concentrations of nitric acid than used in previous tests to decrease the [H+] concentration in the final solutions. Lower [H+] concentrations contri… more
Date: April 1, 1999
Creator: Herbst, Ronald Scott & Garn, Troy Gerry
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Linearity Testing of Photovoltaic Cells: Preprint

Description: Photovoltaic devices are rated in terms of their peak power with respect to a specific spectrum, total irradiance, and temperature. To rate photovoltaic devices, a reference detector is required whose response is linear with total irradiance. This paper describes a procedure to determine the linearity of the short-circuit current (Isc) versus the total irradiance (Etot) by illuminating a reference cell with two lamps. A device is linear if the current measured with both lamps illuminating the c… more
Date: May 1, 2006
Creator: Emery, K.; Winter, S.; Pinegar, S. & D., Nalley
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

High Temperature Thermocouples For In-pile Applications

Description: Traditional methods for measuring temperature in-pile degrade at temperatures above 1080 degrees C. Hence, a project has been initiated to explore the use of specialized thermocouples that are composed of materials that are able to withstand higher temperature, in-pile test conditions. Results from efforts to develop, fabricate and evaluate the performance of these specialized thermocouples are reported in this paper. Candidate materials were evaluated for their ability to withstand irradiation… more
Date: October 1, 2005
Creator: Rempe, J. L. & Wilkins, S. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Literature Review of the Effects of Radiation and Temperature on the Aging of Concrete

Description: The open literature and accessible United States Department of Energy-sponsored reports were reviewed for the effects of radiation and temperature on concrete. No effects of radiation were found for exposures less than 1010 neutron/cm2 or 1010 Gy gamma for periods less than 50 years. Reductions in compressive and tensile strength and a marked increase in volume are reported for exposures greater than 1020 neutron/cm2 or 1010 rads of gamma. There are conflicting reports of damage for doses in th… more
Date: September 1, 2004
Creator: Fillmore, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thermal Velocities Arising from Injection in 2-Phase and Superheated Reservoirs

Description: Production from and injection into geothermal reservoirs gives rise to temperature fronts that move through the porous medium. As many as two temperature fronts are observed in 1-D simulations. The first front is related to the saturation temperature of the production pressure. Its velocity can be calculated from the amount of excess heat in the reservoir, defined as the amount of energy above the interface temperature, Ti = Tsat(Pwf). The second temperature front velocity is the same as for si… more
Date: January 1, 2001
Creator: Shook, George Michael
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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