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Infrastructure for thulium-170 isotope power systems for autonomous underwater vehicle fleets

Description: The radioisotope thulium-170 is a safe and environmentally benign heat source for providing the high endurance and energy densities needed by advanced power systems for autonomous underwater vehicles (AUV). Thulium Isotope Power (TIP) systems have an endurance of {approximately}3000 h, and gravimetric and volumetric energy densities of 3 {times} 10{sup 4} Wh/kg and 3 {times} 10{sup 8} Wh/m{sup 3}, respectively. These energy densities are more than 200 times higher than those currently provided … more
Date: July 1, 1991
Creator: Walter, C.E.
Partner: UNT Libraries Government Documents Department
open access

Performance and flow characteristics of MHD seawater thruster

Description: The main goal of the research is to investigate the effects of strong magnetic fields on the electrical and flow fields inside MHD thrusters. The results of this study is important in the assessment of the feasibility of MHD seawater propulsion for the Navy. To accomplish this goal a three-dimensional fluid flow computer model has been developed and applied to study the concept of MHD seawater propulsion. The effects of strong magnetic fields on the current and electric fields inside the MHD th… more
Date: January 1, 1990
Creator: Doss, E.D.
Partner: UNT Libraries Government Documents Department
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MHD (magnetohydrodynamic) undersea propulsion: A novel concept with renewed interest

Description: This paper discusses the reasons for the national and international renewed interest in the concept of MHD seawater propulsion. The main advantages of this concept are presented, together with some of the technical challenges that need to be overcome to achieve reliability, performance, and stealth. The paper discusses in more detail some of the technical issues and loss mechanisms influencing the thruster performance in terms of its electrical efficiency. Among the issues discussed are the jet… more
Date: January 1, 1990
Creator: Doss, E.D.; Geyer, H.K. (Argonne National Lab., IL (USA)) & Roy, G.D. (Office of Naval Research, Arlington, VA (USA))
Partner: UNT Libraries Government Documents Department
open access

Design of a high power density, permanent magnet, axial gap dc motor

Description: In the design of drive motors for undersea vehicles, the premium placed on noise suppression suggests the use of a brush-commutated dc motor. The additional constraints of weight and volume, as well as unusual configuration, presents the axial air-gap configuration, with a permanent magnet field, as a viable candidate. In such a configuration the design of the brushes and commutator and the resulting structure becomes critical. The report describes a novel solution to this problem. The basic mo… more
Date: January 1, 1990
Creator: Hawsey, R. A.; Daniel, D. S.; Thomas, R. J. (Oak Ridge National Lab., TN (USA)) & Bailey, J. M. (Tennessee Univ., Knoxville, TN (USA))
Partner: UNT Libraries Government Documents Department
open access

Evolution of federal support of science

Description: Evolution of Federal Support of Science'' is Dr. G. T. Seaborg's speech presented at the symposium on the Establishment of Research Support Agencies, held on August 30, 1990, in Washington, DC. He gives a brief history on the development of nuclear energy from the discovery of fission in 1938 to the completion of uranium bombs in 1944. He also covered the scientific activities during the war, which included the establishment of National Defense Research Committee, the Office of Scientific Resea… more
Date: August 1, 1990
Creator: Seaborg, G. T.
Partner: UNT Libraries Government Documents Department
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Model-based ocean acoustic passive localization

Description: The detection, localization and classification of acoustic sources (targets) in a hostile ocean environment is a difficult problem -- especially in light of the improved design of modern submarines and the continual improvement in quieting technology. Further the advent of more and more diesel-powered vessels makes the detection problem even more formidable than ever before. It has recently been recognized that the incorporation of a mathematical model that accurately represents the phenomenolo… more
Date: January 24, 1994
Creator: Candy, J. V. & Sullivan, E. J.
Partner: UNT Libraries Government Documents Department
open access

Experimental determination of magnetohydrodynamic seawater thruster performance in a two Tesla test facility

Description: A two Tesla test facility was designed, built, and operated to investigate the performance of magnetohydrodynamic (MHD) seawater thrusters. The results of this investigation are used to validate MHD thruster performance computer models. The facility test loop, its components, and their design are presented in detail. Additionally, the test matrix and its rational are discussed. finally, representative experimental results of the test program are presented, and are compared to pretest computer m… more
Date: September 1, 1992
Creator: Picologlou, B.; Doss, E.; Black, D. & Sikes, W. C.
Partner: UNT Libraries Government Documents Department
open access

Doubly Fed Induction Generator in an Offshore Wind Power Plant Operated at Rated V/Hz: Preprint

Description: This paper introduces the concept of constant Volt/Hz operation of offshore wind power plants. The deployment of offshore WPPs requires power transmission from the plant to the load center inland. Since this power transmission requires submarine cables, there is a need to use High-Voltage Direct Current transmission, which is economical for transmission distances longer than 50 kilometers. In the concept presented here, the onshore substation is operated at 60 Hz synced with the grid, and the o… more
Date: June 1, 2012
Creator: Muljadi, E.; Singh, M. & Gevorgian, V.
Partner: UNT Libraries Government Documents Department
open access

Special Issue for the 9th International Conference on Carbonaceous Particles in the Atmosphere

Description: Carbonaceous particles are a minor constituent of the atmosphere but have a profound effect on air quality, human health, visibility and climate. The importance of carbonaceous particles has been increasingly recognized and become a mainstream topic at numerous conferences. Such was not the case in 1978, when the 1st International Conference on Carbonaceous Particles in the Atmosphere (ICCPA), or ''Carbon Conference'' as it is widely known, was introduced as a new forum to bring together scient… more
Date: December 11, 2009
Creator: Strawa, A.W.; Kirchstetter, T.W. & Puxbaum, H.
Partner: UNT Libraries Government Documents Department
open access

XRD Technique: A way to disseminate structural changes in iron-based amorphous materials

Description: Prevention of corrosion is a vital goal for the Department of Defense when billions of dollars are spent every year. Corrosion resistant materials have applications in all sort of military vehicles, and more importantly in naval vessels and submarines which come in contact with the seawater. It is known that corrosion resistance property can be improved by the used of structurally designed materials in the amorphous state where the atoms are arranged in a non-periodic fashion and specific atoms… more
Date: May 24, 2007
Creator: Saw, C. K.; Lian, T.; Day, D. & Farmer, J.
Partner: UNT Libraries Government Documents Department
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Petrology and Geochemistry of Boninite Series Volcanic Rocks,Chichi-jima, Bonin Islands, Japan

Description: An Eocene submarine boninite series volcanic center isexposed on the island of Chichi-jima, Bonin Islands, Japan. Five rocktypes, boninite, bronzite andesite, dacite, quartz dacite, and rhyolite,were distinguished within the boninite volcanic sequence on the basis ofpetrographic and geochemical observations. Boninite lavas contain highmagnesium, nickel, and chromium contentsindicative of primitive melts,but have high silica contents relative to other mantle-derived magmas.All boninite series la… more
Date: January 1, 1977
Creator: Dobson, Patrick F.; Blank, Jennifer G.; Maruyama, Shigenori & Liou, J.G.
Partner: UNT Libraries Government Documents Department
open access

Potential Impact of Atmospheric Releases at Russian Far East Nuclear Submarine Complexes

Description: An ''Assessment of the Impact of Russian Nuclear Fleet Operations on Far Eastern Coastal Regions'' is being performed as part of the Radiation Safety of the Biosphere Project (RAD) of the International Institute for Applied Systems Analysis (IIASA) of Laxenburg, Austria. To the best of our knowledge, this is the first comprehensive unclassified analysis of the potential impact of accidents at the Russian Far East nuclear submarine sites near Vladivostok and Petropavlovsk. We have defined the si… more
Date: February 25, 2003
Creator: Parker, F.; Mahura, A.; Compton, K.; Brown, K.; Takano, M.; Novikov, V. et al.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of Management Routes for the Paldiski Sarcophagi

Description: The necessity to develop the submarine fleet in Russia required constructing a special training base for the training of submarine crews. To this purpose two prototypes of nuclear power units, close analogous to those fitting out nuclear submarines were constructed and commissioned in the sixties on the Navy training centre's base located in Paldiski (Pakri peninsula, Estonia). In 1994, nuclear fuel was discharged from the reactors and transported to Russia while the reactors themselves were pr… more
Date: February 27, 2002
Creator: Antonel, L.; Robin, B.; Miller, J. W.; Putnik, H. & Simanovski, Y.
Partner: UNT Libraries Government Documents Department
open access

Radiation Monitoring at FGUP Atomflot and the Polyarninski Shipyard

Description: The Arctic Military Environmental Cooperation (AMEC) Program is a cooperative effort between military establishments of the Russian Federation, United States and Norway to reduce potential environmental threats from military installations and activities in the Arctic and enhancing the environmental security of all three countries. The goal of this project is to enhance the ability to effectively and safely perform radiological monitoring of objects at selected facilities for dismantlement of nu… more
Date: February 26, 2003
Creator: Pomerville, J.; Griffith, A. G.; Moskowitz, P. D.; Endregard, M.; Sidhu, R. S.; Sundling, C-V. et al.
Partner: UNT Libraries Government Documents Department
open access

Lessons Learned and Present Day Challenges of Addressing 20th Century Radiation Legacies of Russia and the United States

Description: The decommissioning of nuclear submarines, disposal of highly-enriched uranium and weapons-grade plutonium, and processing of high-level radioactive wastes represent the most challenging issues facing the cleanup of 20th century radiation legacy wastes and facilities. The US and Russia are the two primary countries dealing with these challenges, because most of the world's fissile inventory is being processed and stored at multiple industrial sites and nuclear weapons production facilities in t… more
Date: October 26, 2000
Creator: KRISTOFZSKI, J.G.
Partner: UNT Libraries Government Documents Department
open access

Membrane Treatment of Liquid Salt Bearing Radioactive Wastes

Description: The main fields of introduction and application of membrane methods for preliminary treatment and processing salt liquid radioactive waste (SLRW) can be nuclear power stations (NPP) and enterprises on atomic submarines (AS) utilization. Unlike the earlier developed technology for the liquid salt bearing radioactive waste decontamination and concentrating this report presents the new enhanced membrane technology for the liquid salt bearing radioactive waste processing based on the state-of-the-a… more
Date: February 25, 2003
Creator: Dmitriev, S. A.; Adamovich, D. V.; Demkin, V. I. & Timofeev, E. M.
Partner: UNT Libraries Government Documents Department
open access

Adaptive ocean acoustic processing for a shallow ocean experiment

Description: A model-based approach is developed to solve an adaptive ocean acoustic signal processing problem. Here we investigate the design of model-based identifier (MBID) for a normal-mode model developed from a shallow water ocean experiment and then apply it to a set of experimental data demonstrating the feasibility of this approach. In this problem we show how the processor can be structured to estimate the horizontal wave numbers directly from measured pressure sound speed thereby eliminating the … more
Date: July 19, 1995
Creator: Candy, J. V. & Sullivan, E. J.
Partner: UNT Libraries Government Documents Department
open access

Experimental determination of magnetohydrodynamic seawater thruster performance in a two Tesla test facility

Description: A two Tesla test facility was designed, built, and operated to investigate the performance of magnetohydrodynamic (MHD) seawater thrusters. The results of this investigation are used to validate MHD thruster performance computer models. The facility test loop, its components, and their design are presented in detail. Additionally, the test matrix and its rational are discussed. finally, representative experimental results of the test program are presented, and are compared to pretest computer m… more
Date: January 1, 1992
Creator: Picologlou, B.; Doss, E.; Black, D. (Argonne National Lab., IL (United States)) & Sikes, W. C. (Newport News Shipbuilding and Dry Dock Co., VA (United States))
Partner: UNT Libraries Government Documents Department
open access

The Enemy Below - The Global Diffusion of Submarines and Related Technology

Description: The end of the Cold War seemed to create a more peaceful international environment. September 11 reminded us of the dangers of complacency. Indeed, even before September 11 US forces had intervened in a number of wars and crises, including Panama, the Persian Gulf War, Somalia, Rwanda, Bosnia, Kosovo, several Taiwan Straits crises, the North Korea nuclear weapons crisis, and most recently Afghanistan. US ability to intervene in remote areas of the world is often dependent on the Navy's ability … more
Date: September 5, 2002
Creator: Weiss, K G
Partner: UNT Libraries Government Documents Department
open access

Challenges Posed by Retired Russian Nuclear Submarines

Description: The purpose of this paper is to provide an overview of the challenges posed by retired Russian nuclear submarines, review current U.S. and International efforts and provide an assessment of the success of these efforts.
Date: February 27, 2003
Creator: Rudolph, Dieter; Kroken, Ingjerd; Latyshev, Eduard & Griffith, Andrew
Partner: UNT Libraries Government Documents Department
open access

Integrated Treatment and Storage Solutions for Solid Radioactive Waste at the Russian Shipyard Near Polyarny

Description: Russian Navy Yard No. 10 (Shkval), near the city of Murmansk, has been designated as the recipient for Solid Radioactive Waste (SRW) pretreatment and storage facilities under the Arctic Military Environmental Cooperation (AMEC) Program. This shipyard serves the Northern Fleet by servicing, repairing, and dismantling naval vessels. Specifically, seven nuclear submarines of the first and second generation and Victor class are laid up at this shipyard, awaiting defueling and dismantlement. One fir… more
Date: February 27, 2002
Creator: Griffith, A.; Engoy, T.; Endregard, M.; Busmundrud, O.; Schwab, P.; Nazarian, A. et al.
Partner: UNT Libraries Government Documents Department
open access

Thulium heat source for high-endurance and high-energy density power systems

Description: We are studying the performance characteristics of radioisotope heat source designs for high-endurance and high-energy-density power systems that use thulium-170. Heat sources in the power range of 5--50 kW{sub th} coupled with a power conversion efficiency of {approximately}30%, can easily satisfy current missions for autonomous underwater vehicles. New naval missions will be possible because thulium isotope power systems have a factor of one-to-two hundred higher endurance and energy density … more
Date: May 1, 1991
Creator: Walter, Carl E.; Kammeraad, Judith E.; Van Konynenburg, Richard & VanSant, James H.
Partner: UNT Libraries Government Documents Department
open access

Broadband acoustic source processing in a noisy shallow ocean environment

Description: Acoustic sources found in the ocean environment are spatially complex and broadband, complicating the analysis of received acoustic data considerably. A model-based approach is developed for a broadband source in a shallow ocean environment characterized by a normal-mode propagation model. Here we develop the optimal Bayesian solution to the broadband pressure-field enhancement and modal function extraction problem.
Date: July 18, 1996
Creator: Candy, J. V. & Sullivan, E. J.
Partner: UNT Libraries Government Documents Department
open access

Model-based processing for shallow ocean environments: The broadband problem

Description: Most acoustic sources found is the ocean environmental are spatially complex and broadband. When propagating in a shallow ocean these source characteristics complicate the analysis of received acoustic data considerably. The enhancement of broadband acoustic pressure- field measurements using a vertical array is discussed. Here a model- based approach is developed for a broadband source using a normal- mode propagation model.
Date: January 31, 1996
Creator: Candy, J. V. & Sullivan, E. J.
Partner: UNT Libraries Government Documents Department
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