211 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Lithium Fluorides"  
Results: 1 - 24 next
open access

TCT hybrid preconceptual blanket design studies

Description: The conceptual design of a tokamak fusion-fission (hybrid) reactor, which produces electric power and fissile material, has been performed in a cooperative effort between Princeton's Plasma Physics Laboratory (PPPL) and Battelle's Pacific Northwest Laboratories (PNL). PPPL, who had overall project lead responsibility, designed the fusion driver system. Its core consists of a tokamak plasma maintained in the two-component torus (TCT) mode by both D and T beams and having a single null poloidal d… more
Date: January 1, 1978
Creator: Aase, D. T.; Bampton, M. C. C.; Doherty, T. J.; Leonard, B. R.; McCann, R. A.; Newman, D. F. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Energy dependence of metallic-encapsulated thermoluminescent dosimeters. Annual report

Description: The gamma-ray energy responses of encapsulated /sup 7/LiF and CaF/sub 2/:Mn thermoluminescent dosimeters were measured and compred to calculated values. This study was performed in order to improve the accuracy of gamma-ray heating measurements made in polyenergetic gamma-ray fields such as Argonne National Laboratory's Zero Power Reactors. Equations used in the development of the TERC/III computer code and code input parameters are specified. A section on TLD precision is also included. Compar… more
Date: June 1980
Creator: Simons, G. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Temperature and shock testing of lithium-organic electrolyte cells. [Li/LiAsF/sub 6/ + LiBF/sub 4/ in methyl formate/V/sub 2/O/sub 5/, Honeywell G2655, performance from -40/sup 0/ to +70/sup 0/C, shock levels up to 17,000 g's]

Description: Honeywell G2655 lithium cells were tested over the temperature range -40/sup 0/ to +70/sup 0/C and subjected to shock levels up to 17,000 g's. Output at -40/sup 0/C was approximately 50 percent of that at +25/sup 0/C, while at +70/sup 0/C the output was 150 percent that at +25/sup 0/C. Shock had no noticeable effect on performance. 99 figures, 6 tables. (auth)
Date: January 1, 1976
Creator: Levy, S.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Personnel dosimetry intercomparison studies at the ORNL Health Physics Research Reactor

Description: The Health Physics Research Reactor (HPRR), used unshielded, with a 12-cm-thick Lucite shield or a 13-cm-thick steel shield, provided three neutron and gamma-ray spectra for personnel dosimetry intercomparison studies. The characterisitcs of these fields, such as neutron energy spectrum, intensity, and uniformity, had been measured previously during nuclear accident dosimetry studies. Exposures were made to simulate total exposures likely to be encountered in personnel dosimetry. Neutron dose e… more
Date: January 1, 1977
Creator: Dickson, H.W. & Gilley, L.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Auger decay mechanism in photon-stimulated desorption of ions from surfaces

Description: Photon-stimulated desorption (PSD) of positive ions was studied with synchrotron radiation using an angle-integrating time-of-flight mass spectrometer. Ion yields as functions of photon energy near core levels were measured from condensed gases, alkali fluorides, and other alkali and alkaline earth halides. These results are compared to bulk photoabsorption measurements with emphasis on understanding fundamental desorption mechanisms. The applicability of the Auger decay mechanism, in which ion… more
Date: November 1, 1983
Creator: Parks, C.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Scattering of phonons by dislocations

Description: By 1950, an explicit effort had been launched to use lattice thermal conductivity measurements in the investigation of defect structures in solids. This technique has been highly successful, especially when combined with the measurements of other properties such as optical absorption. One exception has been the study of dislocations. Although dislocations have a profound effect on the phonon thermal conductivity, the mechanisms of the phonon-dislocation interaction are poorly understood. The mo… more
Date: January 1, 1979
Creator: Anderson, A. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hydrides and Metal-Hydrogen Systems. Final Report

Description: The work reported deals with the preparation and physical properties, especially thermal dissociation pressures, and densities of hydrides, hydrogen- metal systems, and mixtures of hydrides with other substances. Possible applicatlons as moderators, high-temperature neutron shields, and low-temperature shields are cited and design problems discussed. Most of the data on dissociation pressures cover ranges and compounds not hltherto explored because of experimental difficulties and the basic kno… more
Date: April 30, 1951
Creator: Gibb, T. R. P., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radiation damage in diagnostic window materials for the TFTR

Description: The general problem of evaluating diagnostic window materials for the TFTR at the tank wall location is described. Specific evaluations are presented for several materials: vitreous silica, crystal quartz, sapphire, zinc selenide, and several fluorides: lithium fluoride, magnesium fluoride, and calcium fluoride; and seal glasses are discussed. The effects of the neutrons will be minimal. The major problems arise from the high flux of ionizing radiation, mainly the soft x rays which are absorbed… more
Date: July 1, 1981
Creator: Primak, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Molten Salt Reactor option for beneficial use of fissile material from dismantled weapons

Description: The Molten Salt Reactor (MSR) option for burning fissile fuel from dismantled weapons is examined. It is concluded that MSRs are very suitable for beneficial utilization of the dismantled fuel. The MSRs can utilize any fissile fuel in continuous operation with no special modifications, as demonstrated in the Molten Salt Reactor Experiment. Thus MSRs are flexible while maintaining their economy. MSRs further require a minimum of special fuel preparation and can tolerate denaturing and dilution o… more
Date: January 1, 1991
Creator: Gat, U.; Engel, J.R. (Oak Ridge National Lab., TN (USA)) & Dodds, H.L. (Tennessee Univ., Knoxville, TN (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Planar Channeling Radiation From Relativistic Positrons and Electrons in LiF

Description: Channeling radiation has been measured for planar-channeled 54- and 83-MeV positrons and 17-, 31-, and 54-MeV electrons in the ionic crystal LiF. The results are shown to be in reasonable, but not perfect, agreement with the results of many-beam calculations based upon a model of the crystal as an array of isolated Li/sup +/ and F/sup -/ ions.
Date: July 1, 1983
Creator: Berman, B. L.; Datz, S.; Fearick, R. W.; Swent, R. L.; Pantell, R. H.; Park, H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A positronium beam and positronium reflection from LiF

Description: A positronium (Ps) beam has been constructed by transmitting monoenergetic, low energy positrons through a gas cell containing either Ar or He which provide an electron to form positronium. The positrons were obtained by magnetically deflecting positrons in the straight section of the positron beamline into a beamline which contained the gas cell and a Ps detection chamber. The two beamlines provide the capability of switching from an experiment which uses positrons (a study of the angular corr… more
Date: 1987~
Creator: Weber, M.; Berko, S.; Brown, B. L.; Canter, K. F.; Lynn, K. G.; Mills, A. P., Jr. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Cladding hull decontamination and densification process. Part 1. The prototype cladding hull decontamination system

Description: A prototype system for decontaminating Zircaloy-4 cladding hulls has been assembled and tested at Pacific Northwest Laboratory. The decontamination process consists of treatment with a gaseous mixture of hydrogen fluoride (HF) and argon (Ar) followed by a dilute aqueous etch of ammonium oxalate, ammonium citrate, ammonium fluoride, and hydrogen peroxide. The continuous cleaning process described in this report successfully descaled small portions of most charges, but was unable to handle the or… more
Date: April 1, 1980
Creator: Lambright, T.M. & Montgomery, D.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Detonation reaction zone studies on TATB explosives. [PBX 9502 (95/5 wt % TATB/Kel-F), PBX 9503 (80/15/5 wt % TATB/HMX/Kel-F), X-0407 (70/25/5 wt % TATB/PETN/Kel-F)]

Description: Interface velocity histories between heterogeneous detonating explosives and transparent windows, separated by a thin (13 ..mu..m) aluminum shim, have been obtained with an image-intensified rotating-mirror streak camera and a Fabry-Perot velocity interferometer system. Seven TATB-based explosives were studied with PMMA windows for typically three charge lengths. Two of the explosives were also studied with LiF windows. In each case a non-steady detonation was observed, with each increasing cha… more
Date: January 1, 1985
Creator: Seitz, W.L.; Stacy, H.L. & Wackerle, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Press forging and optical properties of lithium fluoride

Description: Lithium fluoride is an important candidate material for windows on high-power, short-pulse ultraviolet and visible lasers. Lithium fluoride crystals have been press forged in one step over the temperature range 300 to 600/sup 0/c to obtain fine-grained polycrystalline material with improved mechanical properties. The deformation that can be given to a lithium fluoride crystal during forging is limited by the formation of internal cloudiness (veiling) with the deformation limit increasing with i… more
Date: January 1, 1979
Creator: Ready, J.F. & Vora, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Nuclear performance optimization of the molten-salt fusion breeder

Description: Improved nuclear analysis, including the treatment of resonance and spatial self-shielding, coupled with an optimization procedure, has resulted in an improved performance estimate for the molten salt blanket. Net U-233 breeding ratio ranges between 0.58 and 0.63, and blanket energy multiplication ranges between 1.8 and 1.9.
Date: June 5, 1986
Creator: Lee, J. D. & Bandini, B. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Corrosion of type 316 stainless steel in molten LiF-LiCl-LiBr

Description: The properties of LiF-LiCl-LiBr salt make it attractive as a solvent for extracting tritium from a fusion reactor lithium blanket. Consequently, the corrosion of type 316 stainless steel by flowing (about 15 mm/s) LiF-LiCl-LiBr at a maximum temperature of 535/sup 0/C was studied to determine whether compatibility with the structural material would be limiting in such a system. The corrosion rate was found to be low (<2 ..mu..m/year) except immediately after the addition of a small amount of lit… more
Date: January 1, 1981
Creator: Tortorelli, P. F.; DeVan, J. H. & Keiser, J. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Beta dosimetry using pulsed laser heating of TLD materials

Description: Use of a pulsed CO/sub 2/ laser to heat the surface of hot-pressed LiF chips has been investigated. The thermoluminescent traps in the first 10 to 20 ..mu..m of depth may be read out with good efficiency, which will allow entrance dose and exit dose to be determined using a standard chip. These dose data can be used to calculate beta dose and gamma dose separately. Readout speed is estimated to be a few milliseconds per chip.
Date: January 1, 1983
Creator: Quam, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Chemical processing of liquid lithium fusion reactor blankets

Description: A 50-gallon-capacity lithium loop constructed mostly from 304L stainless steel has been operated for over 6000 hours at temperatures in the range from 360 to 480/sup 0/C. This facility, the Lithium Processing Test Loop (LPTL), is being used to develop processing and monitoring technology for liquid lithium fusion reactor blankets. Results of tests of a molten-salt extraction method for removing impurities from liquid lithium have yielded remarkably good distribution coefficients for several of … more
Date: January 1, 1979
Creator: Weston, J.R.; Calaway, W.F.; Yonco, R.M.; Hines, J.B. & Maroni, V.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The effect of visible light on Harshaw Model 8801 thermoluminescent dosimeters

Description: It has been known for some time that illumination of lithium fluoride (LiF) thermoluminescent dosimeters, particularly with ultraviolet wavelengths, causes these dosimeters to emit thermoluminescence (TL), similar to that caused by exposure to radiation. However the effect of incandescent light on dosimeters is not well documented. In this study the growth, saturation and spectral dependence of this luminescence is studied for open dosimeter cards illuminated with room incandescent light, and f… more
Date: September 1, 1990
Creator: Sonder, E.; Ahmed, A. B.; McMahan, K. L.; Colwell, D. S. & Smith, P. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mixed field peronnel dosimetry: Part 1, High temperature peak characteristics of the reader-annealed TLD-600

Description: The high temperature peaks (TL peaks 6--7) of TLD-600 are known to have higher responses to high LET radiation than to low LET radiation. These high temperature peak characteristics were studied for the automatic reader-annealed Harshaw albedo neutron TLD. The high temperature peaks response is linear for neutrons over the dose equivalent range tested (0.05--3 mSv of a {sup 252}Cf source moderated by a 15 cm radius polyethylene sphere), but is supralinear above 20 mSv of {sup 137}Cs photons. Th… more
Date: February 1, 1991
Creator: Liu, J.C. (Stanford Linear Accelerator Center, Menlo Park, CA (USA)) & Sims, C.S. (Oak Ridge National Lab., TN (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Acquisition of powder diffraction data with synchrotron radiation

Description: During the past year, a dedicated triple-axis powder diffractometer has been in routine operation at the Brookhaven National Synchrotron Light Source as a user-oriented facility. The diffractometer is designed to allow easy interchange between energy-dispersive and monochromatic beam experiments. In the latter mode of operation, high resolution data have been collected for a variety of samples with the use of the crystal-analyzer technique, and in several cases these data sets have been used su… more
Date: January 1, 1987
Creator: Cox, D. E.; Toby, B. H. & Eddy, M. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen