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Fundamental studies of fusion plasmas. Final report

Description: Lodestar has carried out a vigorous research program in the areas of rf, edge plasma and divertor physics, with emphasis largely geared towards improving the understanding and performance of ion-cyclotron heating and current drive (ICRF) systems. Additionally, a research program in the field of edge plasma and divertor modeling was initiated. Theoretical work on high power rf sheath formation for multi-strap rf arrays was developed and benchmarked against recent experimental data from the new JET A2 antennas. Sophisticated modeling tools were employed to understand the sheath formation taking into account realistic three-dimensional antenna geometry. A novel physics explanation of an observed anomaly in the low power loading of antennas was applied to qualitatively interpret data on DIII-D in terms of rf sheaths, and potential applications of the idea to develop a near-field sheath diagnostic were explored. Other rf-wave related topics were also investigated. Full wave ICRF modeling studies were carried out in support of ongoing and planned tokamaks experiments, including the investigation of low frequency plasma heating and current drive regimes for IGNITOR. In a cross-disciplinary study involving both MHD and ICRF physics, ponderomotive feedback stabilization by rf was investigated as a potential means of controlling external kink mode disruptions. In another study, the instability of the ion hybrid wave (IHW) in the presence of fusion alpha particles was studied. In the field of edge plasma and divertor modeling studies, Lodestar began the development of a theory of generalized ballooning and sheath instabilities in the scrape off layer (SOL) of divertor tokamaks. A detailed summary of the technical progress in these areas during the contract period is included, as well as where references to published work can be found. A separate listing of publications, meeting abstracts, and other presentations is also given at the end of this final report.
Date: January 30, 1998
Creator: Aamodt, R.E.
Partner: UNT Libraries Government Documents Department

Life-sustaining technology and the elderly: geriatric expertise in the context of critical and terminal care

Description: This report of OTA has conducted a study of a wide range of topics, some of which have recently been receiving a great deal of scrutiny inside and outside the government. In order to derive information specific enough to guide possible congressional action and to be responsive to the requesting Committees, this examination of the issues is specifically tied to particular life-sustaining technologies and their use with patients who are elderly. At the same time, much of this information is applicable to life-sustaining technology in general and to citizens of all ages.
Date: November 22, 1985
Creator: American Geriatrics Society
Partner: UNT Libraries Government Documents Department

Properties of Compounds in Coal-Carbonization Products

Description: Report issued by the Bureau of Mines over studies conducted on the compounds of coal carbonization. Descriptions of these compounds are discussed. This report includes tables.
Date: 1963
Creator: Anderson, Hazel C.
Partner: UNT Libraries Government Documents Department

Environmental Research Division Technical Progress Report: January 1986-October 1987

Description: Report of Argonne Environmental Research Division activities, including atmospheric physics, environmental effects research, organic geochemistry and environmental instrumentation, and fundamental molecular physics and chemistry.
Date: June 1988
Creator: Argonne National Laboratory. Environmental Research Division.
Partner: UNT Libraries Government Documents Department

Environmental Sciences Laboratory dedication, February 26-27, 1979

Description: The dedication of the new Environmental Sciences Laboratory coincided with the 25th year of the establishment of the science of ecology at Oak Ridge National Laboratory. That quarter century witnessed the evolution of ecology from an obscure, backwater discipline of biology to a broadly used, everyday household word. The transition reflected broad and basic changes in our social and cultural view of the world. This was brought about as a result of the awareness developed in our society of the importance of the environment, coupled with efforts of ecologists and other environmental scientists who identified, clarified, and formulated the issues and challenges of environmental protection for both the lay public and the scientific community. In many respects, the activities in ecology at ORNL were a microcosm of the broader social scene; the particular problems of the environment associated with atomic energy needed to be defined in scientific terms and articulated in both the specific and general sense for a larger audience which was unfamiliar with the field and somewhat alien to its concepts and philosophy. The success of this effort is reflected in the existence of the new Environmental Sciences Laboratory. This dedication volume brings together the thoughts and reflections of many of these scientists whose efforts contributed in a unique and individualistic fashion not only to ORNL but also to the national identification of ecology and its importance to the achievement of our national goals. Their remarks and presentations are not only a pleasant and personally gratifying recapitulation of the past and of ORNL's contributions to ecology but also portend some of the challenges to ecology in the future.
Date: September 1, 1980
Creator: Auerbach, S.I. & Millemann, N.T. (eds.)
Partner: UNT Libraries Government Documents Department

A review of plutonium environmental data with a bibliography for use in risk assessments

Description: Plutonium fueled radioisotopic heat sources find space, terrestrial, and undersea applications to generate electrical power. Such systems under postulated accident conditions could release radioactivity into the environment resulting in risks to the general population in the form of radiological doses and associated health effects. The evaluation of the radiological impact of postulated scenarios involving releases of activity into the environment includes identification of postulated accident release modes, including the probability of release and the release location; source term definition, including the activity of each radionuclide released and the corresponding chemical form and particle size distribution; analysis of the environmental behavior of the released radioactivity to determine the concentrations in environmental media (air, soil, and water) as a function of time; and analysis of the interaction between the environmental concentrations and man, leading to ingestion, inhalation, and external doses through each environmental exposure pathway. 443 refs., 2 figs., 4 tabs.
Date: June 15, 1983
Creator: Bartram, B.W. & Wilkinson, M.J.
Partner: UNT Libraries Government Documents Department

ORNL Long-Range Environmental and Waste Management Plan: Program overview and summary

Description: The primary purpose is to provide a thorough and systematic planning document to reflect the continuing process of site assessment, strategy development, and planning for the current and long-term control of environmental issues, waste management practices, and remedial action requirments. The document also provides an estimate of the resources required to implenent the current plan. As with any document of this nature, the near-term (one to three years) part of the plan is a realistic assessment of the current program and ongoing capital projects and relects the efforts preceived to be necesary to comply with all current state and federal regulations and DOE orders. It also should be in general agreement with current budget (funding) requests and obligations for these immediate years. Beyond the immediate time frame, the document reflects the strategy and the project and funding estimates as a snapshot at the time of publication. 15 figs., 10 tabs.
Date: December 1, 1987
Creator: Bates, L.D.; Berry, J.B.; Butterworth, G.E.; du Mont, S.P. III; Easterday, C.A.; Geisler, A.H. et al.
Partner: UNT Libraries Government Documents Department

ORNL long-range environmental and waste management plan: Program overview and summary

Description: The primary purpose of this report is to provide a thorough and systematic planning document to reflect the continuing process of site assessment, strategy development, and planning for the current and long-term control of environmental issues, waste management practices, and remedial action requirements. The docuemnt also provides an estimate of the resources required to implement the current plan. This document is not intended to be a budget document: it is, however, intended to provide guidance to both Martin Marietta Energy Systems, Inc., and the US Department of Energy (DOE) Management as to the near order of magnitude of the resources (primarily funding requirements) and the time frame required to execute the strategy in the present revision of the plan. The near-term (one to three years) part of the plan is a realistic assessment of the current program and ongoing capital projects and reflects the efforts preceived to be necessary to comply with all current state and federal regulations and DOE orders. It also should be in general agreement with current budget (funding) requests and obligations for these immediate years. Beyond the immediate time frame, the document reflects the strategy and the project and funding estimates as a snapshot at the time of publication. Annual revision will reflect the continuing evoltuion and development of environmental and waste management processes, characterizations, remedial actions, regulations, an strategies for the establishment and conduct of a comprehensive environmental and waste management program. 15 figs., 10 tabs.
Date: April 1, 1988
Creator: Bates, L.D.; Berry, J.B.; Butterworth, G.E.; du Mont, S.P.; Easterday, C.A.; Geisler, A.H. et al.
Partner: UNT Libraries Government Documents Department

Experimental study of toroidicity-induced Alfven eigenmode (TAE) stability at high q(0)

Description: Experiments to destabilize the Toroidicity-induced Alfven Eigenmode (TAE) by energetic alpha particles were performed on the Tokamak Fusion Test Reactor using deuterium and tritium fuel. To decrease the alpha particle pressure instability threshold, discharges with an elevated value of q(0) > 1.5 were used. By raising q(0), the radial location of the low toroidal-mode-number TAE gaps moves toward the magnetic axis and into alignment with the region of maximum alpha pressure gradient, thereby (in theory) lowering the value of {beta}{sub {alpha}}(0) required for instability. No TAE activity was observed when the central alpha particle {beta}{sub {alpha}} reached 0.08% in a discharge with fusion power of 2.4 MW. Calculations show that the fusion power is within a factor of 1.5 to 3 of the instability threshold.
Date: July 1, 1995
Creator: Batha, S.H.; Levinton, F.M. & Spong, D.A.
Partner: UNT Libraries Government Documents Department

Nevada Test Site Environmental Report 2003

Description: The Nevada Test Site Environmental Report 2003 was prepared by Bechtel Nevada to meet the requirements and guidelines of the U.S. Department of Energy and the information needs of the public. This report is meant to be useful to members of the public, public officials, regulators, and Nevada Test Site contractors. The Executive Summary strives to present in a concise format the purpose of the document, the NTS mission and major programs, a summary of radiological releases and doses to the public resulting from site operations, a summary of non-radiological releases, and an overview of the Nevada Test Site Environmental Management System. The Executive Summary, combined with the following Compliance Summary, are written to meet all the objectives of the report and to be stand-alone sections for those who choose not to read the entire document.
Date: October 2004
Creator: Bechtel Nevada
Partner: UNT Libraries Government Documents Department

Bibliography on augmentation of convective heat and mass transfer-II

Description: Heat transfer augmentation has developed into a major specialty area in heat transfer research and development. This report presents and updated bibliography of world literature on augmentation. The literature is classified into passive augmentation techniques, which require no external power, and active techniques, which do require external power. The fifteen techniques are grouped in terms of their applications to the various modes of heat transfer. Mass transfer is included for completeness. Key words are included with each citation for technique/mode identification. The total number of publications cited is 3045, including 135 surveys of various techniques and 86 papers on performance evaluation of passive techniques. Patents are not included, as they are the subject of a separate bibliographic report.
Date: December 1, 1983
Creator: Bergles, A.E.; Nirmalan, V.; Junkhan, G.H. & Webb, R.L.
Partner: UNT Libraries Government Documents Department

Nonlinear response of driven systems in weak turbulence theory

Description: A method is presented for predicting the saturation levels and particle transport in weakly unstable systems where there are a discrete number of modes. Conditions are established for either steady state or pulsating responses when several modes are excited for cases where there is and there is not resonance overlap. The conditions for achieving different levels of saturation are discussed. Depending on details, the saturation level can be quite low, where only a small fraction of the available free energy is released to waves, or the saturation level can be quite high, with almost a complete conversion of free energy to wave energy coupled with rapid transport.
Date: November 1995
Creator: Berk, H. L.; Breizman, B. N.; Fitzpatrick, J.; Pekker, M. S.; Wong, H. V. & Wong, K. L.
Partner: UNT Libraries Government Documents Department

Nonlinear theory of kinetic instabilities near threshold

Description: A new nonlinear equation has been derived and solved for the evolution of an unstable collective mode in a kinetic system close to the threshold of linear instability. The resonant particle response produces the dominant nonlinearity, which can be calculated iteratively in the near-threshold regime as long as the mode doe snot trap resonant particles. With sources and classical relaxation processes included, the theory describes both soft nonlinear regimes, where the mode saturation level is proportional to an increment above threshold, and explosive nonlinear regimes, where the mode grows to a level that is independent of the closeness to threshold. The explosive solutions exhibit mode frequency shifting. For modes that exist in the absence of energetic particles, the frequency shift is both upward and downward. For modes that require energetic particles for their existence, there is a preferred direction of the frequency shift. The frequency shift continues even after the mode traps resonant particles.
Date: May 1, 1997
Creator: Berk, H.L.; Pekker, M.S. & Breizman, B.N.
Partner: UNT Libraries Government Documents Department

Health and Safety Research Division progress report for the period October 1, 1991--March 31, 1993

Description: This is a progress report from the Health and Safety Research Division of Oak Ridge National Laboratory. Information is presented in the following sections: Assessment Technology, Biological and Radiation Physics, Chemical Physics, Biomedical and Environmental Information Analysis, Risk Analysis, Center for Risk Management, Associate Laboratories for Excellence in Radiation Technology (ALERT), and Contributions to National and Lead Laboratory Programs and Assignments--Environmental Restoration.
Date: September 1, 1993
Creator: Berven, B. A.
Partner: UNT Libraries Government Documents Department