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An Assessment of Potential Health Impacts on Utrok Atoll from Exposure to Cesium-137 (137Cs) and Plutonium

Description: Residual fallout contamination from the nuclear test program in the Marshall Islands is a concern to Marshall Islanders because of the potential health risks associated with exposure to residual fallout contamination in the environment. Scientists from Lawrence Livermore National Laboratory (LLNL) have been monitoring the amount of fallout radiation delivered to Utrok Atoll residents over the past 4 years. This briefing document gives an outline of our findings from the whole body counting and … more
Date: July 24, 2007
Creator: Hamilton, T.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Brightness Limitations in Multi-Kiloampere Electron Beam Sources

Description: Heuristic relationships such as the Lawson-Penner criterion, used to scale Free Electron Laser (FEL) amplifier gain and efficiency over orders of magnitude in beam current and brightness, have no fundamental basis. The brightness of a given source is set by practical design choices such as peak voltage, cathode type, gun electrode geometry, and focusing field topology. The design of low emittance, high current electron guns has received considerable attention at Livermore over the past few year… more
Date: August 24, 1984
Creator: Barletta, W. A.; Boyd, J. K.; Paul, A. C. & Prono, D. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Carbon-14 extraction from reactor gas, Progress report. Production test authorization {number_sign}124

Description: Carbon-14 is by far the most popular of the labeled isotopes because of its adaptability to so many chemical compounds and its relatively harmless characteristic beta radiation. Because the inert gas atmosphere contains up to 30% nitrogen, carbon-14 is generated within the K Reactors by the conversion of nitrogen-14, and if not immediately oxidized, carbon-14 may remain in the reactor core for some time. It is eventually oxidized and escapes when the outward gas leakage from the reactor is vent… more
Date: January 24, 1969
Creator: Cooke, J. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Degradation of Magnet Epoxy at NSLS X-Ray Ring.

Description: Epoxy resin degradation was analyzed for NSLS X-ring magnets after two decades of 2.58-2.8 GeV continuous electron-beam operation, based on results obtained from thermoluminescent dosimeters irradiated along the NSLS ring and epoxy samples irradiated at the beamline target location. A Monte Carlo-based particle transport code, MCNP, was utilized to verify the dose from synchrotron radiation distributed along the axial- and transverse-direction in a ring model, which simulates the geometry of a … more
Date: May 24, 2004
Creator: HU,J. P.; Zhong, Z.; Haas, E.; Hulbert, S. & Hubbard, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development of ultrafiltration and inorganic adsorbents: January--March 1977. [Beta and. gamma. rays]

Description: Ultrafiltration media with and without the assistance of bone char filters were evaluated to determine their effectiveness in removing radionuclides from contaminated solutions. Precipitants, resin, adsorbents, and inorganic adsorbents were studied to determine their effectiveness in decontaminating solutions. A study of the effects of radiation on ultrafiltration media was initiated. An ultrafiltration media pilot plant was ordered and is being installed.
Date: June 24, 1977
Creator: Koenst, J. W. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

FLOW ANALYSIS OF DIFFUSER-GETTER-DIFFUSER SYSTEMS

Description: Tritium clean-up systems typically deploy gas processing technologies between stages of palladium-silver (Pd/Ag) diffusers/permeators. The number of diffusers positioned before and after a gas clean-up process to obtain optimal system performance will vary with feed gas inert composition. A simple method to analyze optimal diffuser configuration is presented. The method assumes equilibrium across the Pd/Ag tubes and system flows are limited by diffuser vacuum pump speeds preceding or following … more
Date: July 24, 2007
Creator: Klein, J & Dave W. Howard, D
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Ghanaian Approach to the Development of an Effective Waste Management Regime

Description: In Ghana, radioactive waste is generated mainly from spent sealed sources, various nuclear applications--diagnostic and therapeutic procedures in medicine and measurement and processing techniques in industry. The radionuclide composition in the waste arising from industry, research and teaching includes 14C, 137Cs, 60Co, 241Am, 3H, 32P, 125I, 192Ir, 131I, 99m Tc, 35S and 90Sr. Ghana is strengthening its radioactive waste management infrastructure, which include the development of a legal frame… more
Date: February 24, 2003
Creator: Adu, P. S.; Gbadago, J. K. & Glover, E. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

GPHS (General Purpose Heat Source) uranium oxide encapsulations supporting satellite safety tests

Description: General Purpose Heat Source (GPHS) simulant-fueled capsules were assembled, welded, nondestructively examined, and shipped to Los Alamos National Laboratory (LANL) for satellite safety tests. Simulant-fueled iridium capsules contain depleted uranium oxide pellets that serve as a stand-in for plutonium-238 oxide pellets. Information on forty seven capsules prepared during 1987 and 1988 is recorded in this memorandum along with a description of the processes used for encapsulation and evaluation.… more
Date: April 24, 1989
Creator: Kanne, W. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

GPHS-RTGs in support of the Cassini mission. Semi-annual technical report, 29 March 1993--26 September 1993

Description: The following tasks were reported on: Spacecraft integration and liaison, engineering support, safety, qualified unicouple fabrication, ETG fabrication/assembly/test, ground support equipment, RTG shipping and launch support, designs/reviews/mission applications, project management/quality assurance/contract changes.
Date: October 24, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

GPHS-RTGs in support of the Cassini Mission. Semiannual technical progress report, 27 September 1993--27 March 1994

Description: This report is organized by the program task structure as follows: (1) spacecraft integration and liaison; (2) engineering support; (3) safety; (4) qualified unicouple fabrication; (5) ETG fabrication, assembly, and test; (6) ground support equipment (GSE); (7) RTG shipping and launch support; (8) designs, reviews, and mission applications; (9) project management, quality assurance and reliability, contract changes, non-capital CAGO acquisition, and CAGO maintenance; and (H) contractor acquired… more
Date: April 24, 1994
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mercury control in the RTF

Description: Engineering controls, described in this report, limit the amount of mercury and moisture introduced to the RTF (233-H). These controls include liquid nitrogen chilled gold traps for mercury and zeolite beds for moisture which are installed in-line. All gas transfers between 232-H or 236-H to 233-H will pass through these traps. Barring unforeseen catastrophic failure of the traps, no detectable amounts of mercury will be introduced via this route. However, a small amount of mercury (near detect… more
Date: March 24, 1993
Creator: Malstrom, R. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrate Biogeochemistry and Reactive Transport in California Groundwater: LDRD Final Report

Description: Nitrate is the number one drinking water contaminant in the United States. It is pervasive in surface and groundwater systems,and its principal anthropogenic sources have increased dramatically in the last 50 years. In California alone, one third of the public drinking-water wells has been lost since 1988 and nitrate contamination is the most common reason for abandonment. Effective nitrate management in groundwater is complicated by uncertainties related to multiple point and non-point sources… more
Date: February 24, 2006
Creator: Esser, B. K.; Beller, H.; Carle, S.; Cey, B.; Hudson, G. B.; Leif, R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Resonances in near-threshold x-ray photoabsorption of inner shells

Description: Synchrotron radiation measurements of near-threshold and broad-range (20 eV - 3 keV) absolute photoabsorption cross sections were made at the Brookhaven National Laboratory (NSLS) and at Stanford (SSRL). Transmission data for well-characterized multilayer foils provided absolute cross sections with 10% overall uncertainties and better than 0.2% energy resolution. Several examples of our results are presented.
Date: August 24, 1987
Creator: Del Grande, N. K.; Tirsell, K. G.; Schneider, M. B.; Garrett, R. F.; Kneedler, E. M. & Manson, S. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

STAR: The Secure Tranportable Autonomous Reactor system, Encapsulated Fission Heat Source. Progress report for period terminating March 31, 2000

Description: Significant progress has been made since the beginning of this project, in September 1999. Part of the project findings are described in References 1 and 2. So far we have found no ''show-stopper''. In fact, based on the findings accumulated so far it appears to us that the Encapsulated Nuclear Heat Source (ENHS) is technologically feasible and looks even more attractive than initially conceived.
Date: April 24, 2000
Creator: Greenspan, Ehud
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

SUBURFACE SHIELDING-SPECIFIC SOURCE TERM EVALUATION

Description: The purpose of this work is to provide supporting calculations for determination of the radiation source terms specific to subsurface shielding design and analysis. These calculations are not intended to provide the absolute values of the source terms, which are under the charter of the Waste Package Operations (WPO) Group. Rather, the calculations focus on evaluation of the various combinations of fuel enrichment, burnup and cooling time for a given decay heat output, consistent with the waste… more
Date: August 24, 1999
Creator: Su, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thulium oxide fuel characterization study: Thulium-170 fueled capsule parametric design

Description: An analytical parametric study was made of an infinitely long, cylindrical fuel capsule containing thulia (Tm/sub 2//sup 170/O/sub 3/) encapsulated in two different physical forms and in two different liner configurations. Diameters of wafers maintained at 0.060 inch thickness were varied between 0.6 and 3.0 inches. Radial temperature profiles were determined for thulia power densities ranging from 8 to 24 W/cc and fuel capsule surface temperatures ranging from 1000 to 2732/sup 0/F. Hastelloy-X… more
Date: June 24, 1970
Creator: DesChamps, N.H.; Fink, C.R. & Nelson, C.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Toward Control of Matter: Basic Energy Science Needs for a New Class of X-Ray Light Sources

Description: Over the past quarter century, light-source user facilities have transformed research in areas ranging from gas-phase chemical dynamics to materials characterization. The ever-improving capabilities of these facilities have revolutionized our ability to study the electronic structure and dynamics of atoms, molecules, and even the most complex new materials, to understand catalytic reactions, to visualize magnetic domains, and to solve protein structures. Yet these outstanding facilities still h… more
Date: September 24, 2008
Creator: Arenholz, Elke; Belkacem, Ali; Cocke, Lew; Corlett, John; Falcone, Roger; Fischer, Peter et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

X-Ray Optics Research for the Linac Coherent Light Source: Interaction of Ultra-Short X-Ray Laser Pulses with Optical Materials

Description: Free electron lasers operating in the 0.1 to 1.5 nm wavelength have been proposed for the Stanford Linear Accelerator Center and DESY (Germany). The unprecedented brightness and associated fluence predicted for pulses <300 fs pose new challenges for optical components. A criterion for optical component design is required, implying an understanding of x-ray-matter interactions at these extreme conditions. In our experimental effort, the extreme conditions are simulated by currently available … more
Date: July 24, 2002
Creator: Kuba, J; Wootton, A; Bionta, R M; Shepherd, R; Dunn, J; Smith, R F et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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