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58
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Corrosion Behavior of Reactor Materials in Fluoride Salt Mixtures
Molten fluoride salts, because of their radiation stability and ability to contain both Th and U, offer important advantages as high-temperature fuel solutions for nuclear reactors and as media suitable for nuclear fuel processing. Both applications have stimulated experimental and theoretical studies of the corrosion processes by which molten salt mixtures attack potential reactor materials. Corrosion experiments with fluoride salts which were conducted in support of the Molten-Salt Reactor E xperiment and analytical methods employed to interpret corrosion and masstransfer behavior in this reactor system are discussed. The products of corrosion of metals by fluoride melts are soluble in the molten salt; accordingly passivation is precluded and corrosion depends directly on the thermodynamic driving force of the corrosion reactions. Compatibility of the container metal and molten salt, therefore, demands the selection of salt constituents which are not appreciably reduced by useful structural alloys and the development of container materials whose components are in near thermodynamic equilibrium with the salt medium. Utilizing information gained in corrosion testing of commercial alloys and in fundamental interpretations of the corrosion process, an alloy development program was conducted to provide a high temperature container material that combined corrosion resistance with useful mechanical properties. The program …
Date:
September 19, 1962
Creator:
DeVan, J. H. & Evans, R. B., III
Object Type:
Report
System:
The UNT Digital Library
Marketing of coal mining equipment. Evaluation of present techniques: suggestions to aid commercialization. Final report
This report is an examination of the equipment preferences and decision-making methodology of the coal industry. The prime purpose is to indicate directions in which equipment research might proceed and also to indicate methods by which investment in new, more productive mining equipment could be encouraged. In addition to this, an investigation of the research and development decisions of major mining equipment manufacturers was conducted. The findings can best be condensed into three categories: needs for equipment in underground mining, needs for equipment in surface mining, and the purchase decision by coal mine operators.
Date:
September 19, 1980
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Military Justice: A Summary of its Legislative and Judicial Development
This report discusses the military justice system and legislation and judicial decisions regarding it.
Date:
September 19, 1969
Creator:
Ujevich, Robert M.
Object Type:
Report
System:
The UNT Digital Library
CERENKOV RADIATION INTENSITY CALCULATIONS FOR Sr$sup 90$ AND Co$sup 60$ IN WATER
A method for calculating Cherenkov radiation intensity from an initial electron energy distribution is presented. The Cherenkov radiation intensity from 1 curie of Sr/sup 90/ in secular equilibrium with Y/sup 90/ in water was calculated from the beta energy spectrum to illustrate the use of the method for a pure beta emitter. The Cherenkov radiation intensity from 1 curie of Co/sup 60/ in water was calculated from the Compton electron energy spectrum to illustrate the use of the method for a gamma emitter. The steps necessary to obtain the Compton electron energy spectrum from a gamma emitter are indicated. (auth)
Date:
September 19, 1961
Creator:
Wymer, R.G. & Biggers, R.E.
Object Type:
Report
System:
The UNT Digital Library
Effect of strain-gage surface preparation techniques on beryllium
Beryllium is a metal sensitive to machining damage, causing a loss in mechanical properties. Since some mechanical abrading is often used in surface preparation for mounting strain gages, it is desirable to know whether the abrading produces flaws. Metallographic study of beryllium subjected to four different surface preparation methods was carried out. It was determined that the gentle abrading necessary for affixing strain gages produced a negligible density and depth of flaws and did not lower the mechanical properties. 5 figures, 2 tables.
Date:
September 19, 1977
Creator:
Hanafee, J. E.; Hughes, Jr., J. W. & McInturff, S. A.
Object Type:
Report
System:
The UNT Digital Library
Performance of Argus as a laser fusion facility
During the fifteen months that the Argus laser facility has been operating we have had two primary goals. These are: (1) to provide focusable, well characterized, high power beams for laser fusion experiments and (2) to further understand the propagation of high power and energy pulses. The propagation experiments have already led to increases in the laser output power and system reliability. Pulses appropriate for advanced targets are shaped to optimize the compression and heating of the target. In general they stress the laser in both limits of energy and power. In this work several results significant to the laser fusion program were realized. The neutron output of fusion targets increased by almost two orders of magnitude to more than 10/sup 9/ neutron/shot. An improved beam propagation technique (image relaying) was developed and partially implemented. It increased the focusable output power for short pulses (30-100 ps) to more than 4.0 TW. More than one kilojoule/beam was extracted from the laser in a high quality beam in a one nanosecond Gaussian pulse. A complex two step optical pulse was generated and successfully amplified to peak powers of more than 3.0 TW. The most recent of the system upgrades are complete image …
Date:
September 19, 1977
Creator:
Speck, D. R.; Simmons, W. W.; Hunt, J. T.; Boyle, M. J.; Rainer, F.; Storm, E. K. et al.
Object Type:
Article
System:
The UNT Digital Library
Use of x-ray imaging on laser fusion experiments
A variety of x-ray imaging techniques have been used to study the absorption, transport and implosion characteristics of exploding pusher microsphere targets irradiated with 1.06 ..mu..m light. Multichannel grazing incidence reflection microscopy, zone plate coded imaging and spatially resolved x-ray spectroscopy have observed the thermal and suprathermal x-ray emission associated with these phenomena. A second generation of x-ray imaging devices, designed for forthcoming high density implosion experiments, including axisymmetric x-ray microscopes and 1- and 2-D crystal line imaging devices, will also be briefly discussed.
Date:
September 19, 1977
Creator:
Boyle, M. J.; Attwood, D. T.; Ceglio, N. M.; Koppel, L. N.; Slivinsky, V. W.; Larsen, J. T. et al.
Object Type:
Article
System:
The UNT Digital Library
Austenitic stainless steels for cryogenic service
Presently available information on austenitic Fe-Cr-Ni stainless steel plate, welds, and castings for service below 77 K are reviewed with the intent (1) of developing systematic relationships between mechanical properties, composition, microstructure, and processing, and (2) of assessing the adequacy of these data bases in the design, fabrication, and operation of engineering systems at 4 K.
Date:
September 19, 1985
Creator:
Dalder, E.N.C. & Juhas, M.C.
Object Type:
Report
System:
The UNT Digital Library
Selective generation and extraction of low emittance electrons from plasmas: A new concept for E-beam cathodes
It is shown that hollow cathode discharges can operate in a mode characterized by a two-component electron energy distribution: bulk electrons with a thermal distribution with a temperature of a few electron volts, and a component of fast electrons with an energy of about 30 eV and a thermal spread of about 0.1 eV. Measurements of both parallel and perpendicular energy spreads confirm the existence of fast, low energy spread electrons. Selective extraction of these electrons can form the basis of a high current, high brightness electron gun which could be well suited for EBIS applications. 8 refs., 4 figs., 1 tab.
Date:
September 19, 1991
Creator:
Hershcovitch, A.
Object Type:
Article
System:
The UNT Digital Library
Army Corps Supplemental Appropriations: Recent History, Trends, and Policy Issues
This report provides analysis of Corps supplemental funding. Its focus is recent decades of supplemental funding provided directly to the Corps, and it does not include extensive analysis of regular Corps appropriations.
Date:
September 19, 2013
Creator:
Stern, Charles V. & Carter, Nicole T.
Object Type:
Report
System:
The UNT Digital Library
Medicare Financing
This report provides an overview of how the Medicare program is financed, including a description of the Medicare trust funds and a summary of key findings and estimates from the 2013 Report of the Medicare Board of Trustees regarding 2012 program operations and future financial soundness.
Date:
September 19, 2013
Creator:
Davis, Patricia A.
Object Type:
Report
System:
The UNT Digital Library
Reaching the Debt Limit: Background and Potential Effects on Government Operations
This report examines the possibility of the federal government reaching its statutory debt limit and not raising it, with a particular focus on government operations. First, the report explains the nature of the federal government's debt, the processes associated with federal borrowing, and historical events that may influence prospective actions. It also includes an analysis of what could happen if the federal government may no longer issue debt, has exhausted alternative sources of cash, and, therefore, depends on incoming receipts or other sources of funds to provide any cash needed to liquidate federal obligations.2 Finally, this report lays out considerations for increasing the debt limit under current policy and what impact fiscal policy could have on the debt limit going forward.
Date:
September 19, 2013
Creator:
Levit, Mindy R.; Brass, Clinton T.; Nicola, Thomas J. & Nuschler, Dawn
Object Type:
Report
System:
The UNT Digital Library
Patient Protection and Affordable Care Act (ACA): Resources for Frequently Asked Questions
The report provides basic consumer sources, including broad overviews of the ACA law. The next sections focus on health coverage: the individual mandate, private health insurance, and exchanges, as well as public health care programs, such as Medicaid and the State Children's Health Insurance Program (CHIP), Medicare, Indian health care, and veterans' and military health care. The report then lists sources on employer-sponsored coverage, including sources on employer penalties, small businesses, federal workers' health plans, and union health plans. The report also provides sources on ACA's provisions on mental health, public health, workforce, quality, and taxes. Finally, the report lists sources on ACA costs and appropriations, and sources for obtaining the law's full-text.
Date:
September 19, 2013
Creator:
Napili, Angela
Object Type:
Report
System:
The UNT Digital Library
Private Health Plans Under the ACA: In Brief
This report provides short descriptions of health plans that may be offered inside and outside of exchanges, and includes information about interaction with other selected ACA provisions. The descriptions are displayed in a side-by-side format to facilitate comparison of exchange and nonexchange plans.
Date:
September 19, 2013
Creator:
Fernandez, Bernadette & Mach, Annie L.
Object Type:
Report
System:
The UNT Digital Library
The Northeast Home Heating Oil Reserve and the National Oilheat Research Alliance
This report discusses the price of home heating oil in the Northeast. The Northeast demand for home heating oil has declined by 47% since 2000, from nearly 7 billion gallons to 3.6 billion gallons in 2011. The report provides detailed information regarding northeast home heating oil reserve and national Oilheat Research Alliance.
Date:
September 19, 2013
Creator:
Andrews, Anthony
Object Type:
Report
System:
The UNT Digital Library
Nuclear Energy Policy
This report discusses nuclear energy issues currently facing Congress, such as federal incentives for new commercial reactors, radioactive waste management policy, research and development priorities, power plant safety and regulation, nuclear weapons proliferation, and security against terrorist attacks.
Date:
September 19, 2013
Creator:
Holt, Mark
Object Type:
Report
System:
The UNT Digital Library
Suspension and Debarment: DOD Has Active Referral Processes, but Action Needed to Promote Transparency
A letter report issued by the Government Accountability Office with an abstract that begins "The four Department of Defense (DOD) components GAO examined have active processes for referring identified cases of contractor misconduct for appropriate action, including suspension or debarment. The components identify numerous cases of actual or alleged contractor misconduct each year from various internal and external sources. The figure below shows the process for identifying and referring cases to the suspension and debarment official for consideration."
Date:
September 19, 2012
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Waivers Related to the Temporary Assistance for Needy Families Block Grant
Correspondence issued by the Government Accountability Office with an abstract that begins "In response to a Congressional request for information on waivers related to TANF, we addressed the following questions:"
Date:
September 19, 2012
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Weapons Acquisition Reform: Actions Needed to Address Systems Engineering and Developmental Testing Challenges
A letter report issued by the Government Accountability Office with an abstract that begins "For the past 2 years, the Department of Defense (DOD) has been implementing the Weapon Systems Acquisition Reform Act (Reform Act) requirements for systems engineering and developmental testing. These activities are important to DOD's ability to control acquisition costs, which increased by $135 billion over the past 2 years for 98 major defense acquisition programs. GAO was asked to determine (1) DOD's progress in implementing the Reform Act's requirements and (2) whether there are challenges at the military service level that could affect their systems engineering and developmental testing activities. To do this, GAO analyzed implementation status documents, discussed developmental testing office concerns with current and former DOD officials, and analyzed military service workforce growth plans and test range funding data.."
Date:
September 19, 2011
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Defense Logistics: Army and Marine Corps Cannot Be Assured That Equipment Reset Strategies Will Sustain Equipment Availability While Meeting Ongoing Operational Requirements
A letter report issued by the Government Accountability Office with an abstract that begins "Congress has appropriated billions of dollars for equipment repair, replacement, and recapitalization, collectively known as equipment reset. Because of the potential for equipment reset costs to affect the Department of Defense's (DOD) future budget requirements and related readiness concerns, GAO initiated this review under the Comptroller General's authority. GAO's objectives were to determine the extent to which the Army and Marine Corps (1) track and report equipment reset expenditures in a way that confirms that funds appropriated for reset are expended for that purpose and (2) can be assured that their reset strategies will sustain equipment availability while meeting ongoing operational requirements. GAO reviewed equipment reset policies and analyzed related budget data."
Date:
September 19, 2007
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Managing Critical Isotopes: Stewardship of Lithium-7 Is Needed to Ensure a Stable Supply
A letter report issued by the Government Accountability Office with an abstract that begins "Little is known about lithium-7 production in China and Russia and whether their supplies can meet future domestic demand. According to industry representatives, China and Russia produce enough lithium-7 to meet demand from U.S. pressurized water reactors, a type of commercial nuclear power reactor that requires lithium-7 for safe operation. However, China's continued supply may be reduced by its own growing demand, according to an expert that is familiar with China's plans. Specifically, China is building several pressurized water reactors and developing a new type of reactor that will require 1,000s of kilograms of lithium-7 to operate, rather than the 300 kilograms needed annually for all 65 U.S. pressurized water reactors. Relying on two producers of lithium-7 leaves U.S. pressurized water reactors vulnerable to lithium-7 supply disruptions."
Date:
September 19, 2013
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Human Service Programs: Demonstration Projects Could Identify Ways to Simplify Policies and Facilitate Technology Enhancements to Reduce Administrative Costs
A letter report issued by the Government Accountability Office with an abstract that begins "The cost of administering human service programs has been a long-standing concern among policy makers interested in ensuring that federal programs are run in a cost-efficient manner so that federal funds go directly to helping vulnerable people. Little is known about how administrative costs compare among programs, or about opportunities to better manage these costs. GAO looked at (1) how administrative costs are defined and what rules govern federal and state participation in funding these costs; (2) what is known about the amounts of administrative spending and how they have changed over time; and (3) what opportunities exist at the federal level to help states balance cost savings with program effectiveness and integrity. GAO's review included seven programs: Adoption Assistance, Child Care and Development Fund (CCDF), Child Support Enforcement (CSE), food stamps, Foster Care, Temporary Assistance for Needy Families (TANF), and Unemployment Insurance (UI). To address the questions, GAO reviewed laws, analyzed spending data, and visited five states."
Date:
September 19, 2006
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Federal Real Property: Greater Transparency and Strategic Focus Needed for High-Value GSA Leases
A letter report issued by the Government Accountability Office with an abstract that begins "The General Services Administration's (GSA) 218 high-value leases GAO reviewed represented only about 3 percent of the total number of GSA leases, yet made up about one-third of its leased portfolio in terms of cost and size. GSA has reduced the costs of its high-value leases in line with the administration's goal to reduce real property costs. GSA's efforts include helping agencies improve space utilization. However, for leases nearing expiration, GSA and tenant agencies have faced challenges in funding space renovations and moving costs. This lack of funds has contributed to delays and some cases in which GSA continues to occupy space after the lease expires."
Date:
September 19, 2013
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Alaska Native Corporations: Increased Use of Special 8(a) Provisions Calls for Tailored Oversight
Testimony issued by the Government Accountability Office with an abstract that begins "Alaska Native corporations (ANC) were created to settle land claims with Alaska Natives and foster economic development. In 1986, legislation passed that allowed ANCs to participate in the Small Business Administration's (SBA) 8(a) program. Since then, Congress has extended special procurement advantages to 8(a) ANC firms, such as the ability to receive sole-source contracts for any dollar amount and to own multiple subsidiaries in the 8(a) program. We were asked to testify on an earlier report where we identified (1) trends in the government's 8(a) contracting with ANC firms, (2) the reasons agencies have awarded 8(a) sole-source contracts to ANC firms and the facts and circumstances behind some of these contracts, and (3) how ANCs are using the 8(a) program. GAO also evaluated SBA's oversight of 8(a) ANC firms. GAO made recommendations aimed at improving SBA's oversight of 8(a) ANC contracting activity and ensuring that procuring agencies properly oversee 8(a) contracts they award to ANC firms. SBA has either taken action or plans to take action on the recommendations. The procuring agencies generally agreed with our recommendation to them. We believe implementation of our recommendations will provide better …
Date:
September 19, 2007
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library