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Lithium Isotope Separation by Electrolysis

Description: Two approaches to lithium isotope separation have been followed in this research and are described and compared. One is electrolysis in non-aqueous systems at high cathode efficiency. The other is electrolysis in aqueous systems with anode depolarizers.
Date: September 4, 1950
Creator: Kennedy, Joseph W
Partner: UNT Libraries Government Documents Department


Description: This report provides detailed and timely information on the results of the isotopic fuels program and related research being conducted at the Pacific Northwest Laboratory by Battelle-Northwest for the U.S. Atomic Energy Commission. This report covers the 3-month period, February through April 1970.
Date: May 1, 1970
Creator: Hansen, J. E.
Partner: UNT Libraries Government Documents Department


Description: This report examines the feasibility of radioluminescent light applications for rural Alaskan airports. The work presented in this report covers four tasks: State of the Art Evaluation of Radioluminescent Lights, Environmental, Radiological, and Regulatory Evaluations, Engineering Evaluations, and Demonstration Plan Development.
Date: January 1, 1984
Creator: Jensen, G.; Perrigo, L.; Leonard, L. & Hegdal, L
Partner: UNT Libraries Government Documents Department

Improved Production and Separation Technologies for Non-standard PET Radionuclides

Description: Brief summary of activity issues, concerns, successes: Project 1 is completed. We have optimized plating parameters with the new target bodies and slanted target plating system. The target station has been mounted on the end of the beamline, service lines have been nstalled to allow for helium and water cooling. We have routinely produced copper-64 using the new slanted target system in conjunction with our automated system. In project 2, we successfully fabricated and tested microfluidic extraction devices made out of two organic solvent-resistant polymers, thiolene and SIFEL. Initially, we developed analytical and computational models to describe the extraction process, and used the model to design the microfluidic devices. Then we optimized the microfabrication procedures to manufacture microreactors, followed by optimization of the operational parameters to obtain a stable aqueous-organic interface, which is critical for efficient extraction. When we tested the thiolene devices for extraction of copper-64, we observed very low extraction efficiencies (less than 5%) due to adhesion of copper to thiolene. However, we observed very high extraction efficiencies with SIFEL devices (greater than 95%), which are due to the high interfacial area for extraction and shorter diffusion lengths.
Date: December 1, 2012
Creator: Welch, Michael J. & Lapi, Suzanne
Partner: UNT Libraries Government Documents Department


Description: The Savannah River Tritium Plant (TP) relies on well understood but aging sensor technology for process gas analysis. Though new sensor technologies have been brought to various readiness levels, the TP has been reluctant to install technologies that have not been tested in tritium service. This gap between sensor technology development and incorporating new technologies into practical applications demonstrates fundamental challenges that exist when transitioning from status quo to state-of-the-art in an extreme environment such as a tritium plant. These challenges stem from three root obstacles: 1) The need for a comprehensive assessment of process sensing needs and requirements; 2) The lack of a pick-list of process-compatible sensor technologies; and 3) The need to test technologies in a tritium-contaminated process environment without risking production. At Savannah River, these issues are being addressed in a two phase project. In the first phase, TP sensing requirements were determined by a team of process experts. Meanwhile, Savannah River National Laboratory sensor experts identified candidate technologies and related them to the TP processing requirements. The resulting roadmap links the candidate technologies to actual plant needs. To provide accurate assessments of how a candidate sensor technology would perform in a contaminated process environment, an instrument demonstration station was established within a TP glove box. This station was fabricated to TP process requirements and designed to handle high activity samples. The combination of roadmap and demonstration station provides the following assets: � Creates a partnership between the process engineers and researchers for sensor selection, maturation, and insertion, � Selects the right sensors for process conditions � Provides a means for safely inserting new sensor technology into the process without risking production, and � Provides a means to evaluate off normal occurrences where and when they occur. This paper discusses the process to identify and demonstrate new ...
Date: October 2, 2013
Creator: Tovo, L.; Wright, J.; Torres, R. & Peters, B.
Partner: UNT Libraries Government Documents Department


Description: Savannah River Site plays a critical role in the Tritium Production Supply Chain for the National Nuclear Security Administration (NNSA). The entire process includes: • Production of Tritium Producing Burnable Absorber Rods (TPBARs) at the Westinghouse WesDyne Nuclear Fuels Plant in Columbia, South Carolina • Production of unobligated Low Enriched Uranium (LEU) at the United States Enrichment Corporation (USEC) in Portsmouth, Ohio • Irradiation of TPBARs with the LEU at the Tennessee Valley Authority (TVA) Watts Bar Reactor • Extraction of tritium from the irradiated TPBARs at the Tritium Extraction Facility (TEF) at Savannah River Site • Processing the tritium at the Savannah River Site, which includes removal of nonhydrogen species and separation of the hydrogen isotopes of protium, deuterium and tritium.
Date: August 21, 2013
Creator: Wyrick, Steven; Cordaro, Joseph; Founds, Nanette & Chambellan, Curtis
Partner: UNT Libraries Government Documents Department

Novel Cyclotron-Based Radiometal Production

Description: Accomplishments: (1) Construction of prototype solution target for radiometal production; (2) Testing of prototype target for production of following isotopes: a. Zr-89. Investigation of Zr-89 production from Y-89 nitrate solution. i. Defined problems of gas evolution and salt precipitation. ii. Solved problem of precipitation by addition of nitric acid. iii. Solved gas evolution problem with addition of backpressure regulator and constant degassing of target during irradiations. iv. Investigated effects of Y-89 nitrate concentration and beam current. v. Published abstracts at SNM and ISRS meetings; (3) Design of 2nd generation radiometal solution target. a. Included reflux chamber and smaller target volume to conserve precious target materials. b. Included aluminum for prototype and tantalum for working model. c. Included greater varicosities for improved heat transfer; and, (4) Construction of 2nd generation radiometal solution target started.
Date: October 31, 2013
Creator: DeGrado, Timothy R.
Partner: UNT Libraries Government Documents Department

Cobalt Source Calibration

Description: The data obtained from these tests determine the dose rate of the two cobalt sources in SRTC. This testing used chemical dosimetry to measure the dose rate of a radioactive source.
Date: October 25, 1999
Creator: Barnes, M.
Partner: UNT Libraries Government Documents Department

Characteristics of the 7-GeV Advanced Photon Source : a Guide for Users

Description: In this document we present the characteristics of the electromagnetic radiation from various types of sources on the 7-GeV Advanced Photon Source (APS) storage ring. The sources include bending magnets, undulators, and wigglers. The characteristics are compared with those of other synchrotron sources when operated at their design specifications. The influence of positron beam size on the on-axis brilliance is discussed, along with the power distribution from these sources. The goal of this document is to provide users with enough information on the characteristics of radiation from the APS storage ring so that experiments can be efficiently planned.
Date: February 1988
Creator: Shenoy, G. K.; Viccaro, P. J. & Mills, Dennis M.
Partner: UNT Libraries Government Documents Department

LOCA mitigation studies for the advanced neutron source: The inertial flow diode concept

Description: This paper documents a study of the consequences of loss of coolant accidents in the Advanced Neutron Source reactor, and it introduces the concept of an inertial flow diodes to mitigate the effect of large cold leg breaks. 2 refs., 1 fig.
Date: January 1, 1991
Creator: Khayat, M.I.; Perez, R.B. (Tennessee Univ., Knoxville, TN (USA)) & March-Leuba, J. (Oak Ridge National Lab., TN (USA))
Partner: UNT Libraries Government Documents Department

(International Collaboration on Advanced Neutron Sources)

Description: The International Collaboration on Advanced Neutron Sources was started about a decade ago with the purpose of sharing information throughout the global neutron community. The collaboration has been extremely successful in optimizing the use of resources, and the discussions are open and detailed, with reasons for failure shared as well as reasons for success. Although the meetings have become increasingly oriented toward pulsed neutron sources, many of the neutron instrumentation techniques, such as the development of better monochromators, fast response detectors and various data analysis methods, are highly relevant to the Advanced Neutron Source (ANS). I presented one paper on the ANS, and another on the neutron optical polarizer design work which won a 1989 R D-100 Award. I also gained some valuable design ideas, in particular for the ANS hot source, in discussions with individual researchers from Canada, Western Europe, and Japan.
Date: November 8, 1990
Creator: Hayter, J.B.
Partner: UNT Libraries Government Documents Department


Description: In recent years there has been an increased interest in the use of transuranium isctopes for special power applications. Moreover, as the civilian power reactor economy expands, a large quantity of such isotopes will be formed in reactors using slightly enriched uranium fuel and, more particularly, in reactors which recycle the higher isotopes they form. This report, consisting mainly of computer printouts, indicates the yields of transuranium isotopes from different fueling methods. Since water reactors will be the predominate type of power reactor for at least a decade, most of the values presented here are derived from simulated water reactors.
Date: January 1, 1966
Creator: Deonigi, D.E.
Partner: UNT Libraries Government Documents Department

Use of the ARM Measurement of Spectral Zenith Radiance For Better Understanding Of 3D Cloud-Radiation Processes and Aerosol-Cloud Interaction

Description: Our proposal focuses on cloud-radiation processes in a general 3D cloud situation, with particular emphasis on cloud optical depth and effective particle size. We also focus on zenith radiance measurements, both active and passive. The proposal has three main parts. Part One exploits the “solar-background” mode of ARM lidars to allow them to retrieve cloud optical depth not just for thin clouds but for all clouds. This also enables the study of aerosol cloud interactions with a single instrument. Part Two exploits the large number of new wavelengths offered by ARM’s zenith-pointing ShortWave Spectrometer (SWS), especially during CLASIC, to develop better retrievals not only of cloud optical depth but also of cloud particle size. We also propose to take advantage of the SWS’ 1 Hz sampling to study the “twilight zone” around clouds where strong aerosol-cloud interactions are taking place. Part Three involves continuing our cloud optical depth and cloud fraction retrieval research with ARM’s 2NFOV instrument by, first, analyzing its data from the AMF-COPS/CLOWD deployment, and second, making our algorithms part of ARM’s operational data processing.
Date: October 19, 2010
Creator: Chiu, D. Jui-Yuan
Partner: UNT Libraries Government Documents Department


Description: Fifty-watt, triply encapsulated radiation sources, supplied by the Division of Isotopes Development, AEC, and consisting of about 125 g of {sup 238}PuO{sub 2}{sup 16} (87.8 g of {sup 238}Pu in 110.2 g of Pu mixture, total activity 1500 Ci), are to be used in studies of the biologic effects of heat and radiation in support of the artificial heart program, under sponsorship of the Division of Biology and Medicine, AEC. A review of the circumstances which could lead to a loss of control of this moterial while in the Biology Laboratories (331 Building, 300 Area) has been made and steps taken to minimize the likelihood of such an occurrence. Significant external dose and criticality accidents are not judged to be credible. Credibility of an internal exposure accident is marginal to insignificant. An internal exposure accident is postulated; however, it is concluded that loss of control is unlikely and the studies would not result in significant risk to the public.
Date: September 1, 1971
Creator: Cross, F. T. & Gillis, M F.
Partner: UNT Libraries Government Documents Department